4827 lines
179 KiB
C++
4827 lines
179 KiB
C++
/*
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/javaAssertions.hpp"
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#include "classfile/moduleEntry.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/symbolTable.hpp"
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#include "gc/shared/cardTableRS.hpp"
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#include "gc/shared/genCollectedHeap.hpp"
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#include "gc/shared/referenceProcessor.hpp"
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#include "gc/shared/taskqueue.hpp"
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#include "logging/log.hpp"
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#include "logging/logConfiguration.hpp"
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#include "logging/logStream.hpp"
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#include "logging/logTag.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/universe.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/arguments_ext.hpp"
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#include "runtime/commandLineFlagConstraintList.hpp"
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#include "runtime/commandLineFlagWriteableList.hpp"
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#include "runtime/commandLineFlagRangeList.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/globals_extension.hpp"
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#include "runtime/java.hpp"
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#include "runtime/os.hpp"
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#include "runtime/vm_version.hpp"
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#include "services/management.hpp"
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#include "services/memTracker.hpp"
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#include "utilities/defaultStream.hpp"
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#include "utilities/macros.hpp"
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#include "utilities/stringUtils.hpp"
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#if INCLUDE_JVMCI
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#include "jvmci/jvmciRuntime.hpp"
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#endif
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#if INCLUDE_ALL_GCS
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#include "gc/cms/compactibleFreeListSpace.hpp"
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#include "gc/g1/g1CollectedHeap.inline.hpp"
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#include "gc/parallel/parallelScavengeHeap.hpp"
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#endif // INCLUDE_ALL_GCS
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// Note: This is a special bug reporting site for the JVM
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#define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
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#define DEFAULT_JAVA_LAUNCHER "generic"
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char* Arguments::_jvm_flags_file = NULL;
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char** Arguments::_jvm_flags_array = NULL;
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int Arguments::_num_jvm_flags = 0;
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char** Arguments::_jvm_args_array = NULL;
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int Arguments::_num_jvm_args = 0;
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char* Arguments::_java_command = NULL;
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SystemProperty* Arguments::_system_properties = NULL;
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const char* Arguments::_gc_log_filename = NULL;
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bool Arguments::_has_profile = false;
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size_t Arguments::_conservative_max_heap_alignment = 0;
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size_t Arguments::_min_heap_size = 0;
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Arguments::Mode Arguments::_mode = _mixed;
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bool Arguments::_java_compiler = false;
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bool Arguments::_xdebug_mode = false;
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const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
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const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
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int Arguments::_sun_java_launcher_pid = -1;
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bool Arguments::_sun_java_launcher_is_altjvm = false;
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// These parameters are reset in method parse_vm_init_args()
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bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
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bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
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bool Arguments::_BackgroundCompilation = BackgroundCompilation;
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bool Arguments::_ClipInlining = ClipInlining;
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intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
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intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
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char* Arguments::SharedArchivePath = NULL;
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AgentLibraryList Arguments::_libraryList;
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AgentLibraryList Arguments::_agentList;
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abort_hook_t Arguments::_abort_hook = NULL;
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exit_hook_t Arguments::_exit_hook = NULL;
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vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
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SystemProperty *Arguments::_sun_boot_library_path = NULL;
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SystemProperty *Arguments::_java_library_path = NULL;
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SystemProperty *Arguments::_java_home = NULL;
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SystemProperty *Arguments::_java_class_path = NULL;
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SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
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GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
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PathString *Arguments::_system_boot_class_path = NULL;
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bool Arguments::_has_jimage = false;
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char* Arguments::_ext_dirs = NULL;
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// Check if head of 'option' matches 'name', and sets 'tail' to the remaining
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// part of the option string.
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static bool match_option(const JavaVMOption *option, const char* name,
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const char** tail) {
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size_t len = strlen(name);
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if (strncmp(option->optionString, name, len) == 0) {
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*tail = option->optionString + len;
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return true;
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} else {
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return false;
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}
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}
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// Check if 'option' matches 'name'. No "tail" is allowed.
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static bool match_option(const JavaVMOption *option, const char* name) {
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const char* tail = NULL;
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bool result = match_option(option, name, &tail);
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if (tail != NULL && *tail == '\0') {
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return result;
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} else {
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return false;
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}
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}
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// Return true if any of the strings in null-terminated array 'names' matches.
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// If tail_allowed is true, then the tail must begin with a colon; otherwise,
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// the option must match exactly.
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static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
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bool tail_allowed) {
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for (/* empty */; *names != NULL; ++names) {
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if (match_option(option, *names, tail)) {
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if (**tail == '\0' || tail_allowed && **tail == ':') {
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return true;
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}
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}
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}
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return false;
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}
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static void logOption(const char* opt) {
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if (PrintVMOptions) {
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jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
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}
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}
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bool needs_module_property_warning = false;
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#define MODULE_PROPERTY_PREFIX "jdk.module."
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#define MODULE_PROPERTY_PREFIX_LEN 11
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#define ADDEXPORTS "addexports"
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#define ADDEXPORTS_LEN 10
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#define ADDREADS "addreads"
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#define ADDREADS_LEN 8
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#define ADDOPENS "addopens"
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#define ADDOPENS_LEN 8
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#define PATCH "patch"
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#define PATCH_LEN 5
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#define ADDMODS "addmods"
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#define ADDMODS_LEN 7
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#define LIMITMODS "limitmods"
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#define LIMITMODS_LEN 9
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#define PATH "path"
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#define PATH_LEN 4
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#define UPGRADE_PATH "upgrade.path"
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#define UPGRADE_PATH_LEN 12
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// Return TRUE if option matches 'property', or 'property=', or 'property.'.
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static bool matches_property_suffix(const char* option, const char* property, size_t len) {
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return ((strncmp(option, property, len) == 0) &&
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(option[len] == '=' || option[len] == '.' || option[len] == '\0'));
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}
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// Return true if property starts with "jdk.module." and its ensuing chars match
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// any of the reserved module properties.
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// property should be passed without the leading "-D".
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bool Arguments::is_internal_module_property(const char* property) {
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assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
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if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
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const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
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if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
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matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
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matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
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matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
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matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
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matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
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matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
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matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
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return true;
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}
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}
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return false;
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}
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// Process java launcher properties.
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void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
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// See if sun.java.launcher, sun.java.launcher.is_altjvm or
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// sun.java.launcher.pid is defined.
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// Must do this before setting up other system properties,
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// as some of them may depend on launcher type.
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for (int index = 0; index < args->nOptions; index++) {
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const JavaVMOption* option = args->options + index;
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const char* tail;
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if (match_option(option, "-Dsun.java.launcher=", &tail)) {
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process_java_launcher_argument(tail, option->extraInfo);
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continue;
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}
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if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
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if (strcmp(tail, "true") == 0) {
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_sun_java_launcher_is_altjvm = true;
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}
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continue;
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}
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if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
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_sun_java_launcher_pid = atoi(tail);
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continue;
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}
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}
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}
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// Initialize system properties key and value.
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void Arguments::init_system_properties() {
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// Set up _system_boot_class_path which is not a property but
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// relies heavily on argument processing and the jdk.boot.class.path.append
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// property. It is used to store the underlying system boot class path.
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_system_boot_class_path = new PathString(NULL);
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
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"Java Virtual Machine Specification", false));
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
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PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
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// Following are JVMTI agent writable properties.
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// Properties values are set to NULL and they are
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// os specific they are initialized in os::init_system_properties_values().
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_sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
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_java_library_path = new SystemProperty("java.library.path", NULL, true);
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_java_home = new SystemProperty("java.home", NULL, true);
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_java_class_path = new SystemProperty("java.class.path", "", true);
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// jdk.boot.class.path.append is a non-writeable, internal property.
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// It can only be set by either:
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// - -Xbootclasspath/a:
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// - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
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_jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
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// Add to System Property list.
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PropertyList_add(&_system_properties, _sun_boot_library_path);
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PropertyList_add(&_system_properties, _java_library_path);
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PropertyList_add(&_system_properties, _java_home);
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PropertyList_add(&_system_properties, _java_class_path);
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PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
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// Set OS specific system properties values
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os::init_system_properties_values();
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}
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// Update/Initialize System properties after JDK version number is known
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void Arguments::init_version_specific_system_properties() {
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enum { bufsz = 16 };
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char buffer[bufsz];
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const char* spec_vendor = "Oracle Corporation";
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uint32_t spec_version = JDK_Version::current().major_version();
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jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.specification.version", buffer, false));
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
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}
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/*
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* -XX argument processing:
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*
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* -XX arguments are defined in several places, such as:
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* globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
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* -XX arguments are parsed in parse_argument().
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* -XX argument bounds checking is done in check_vm_args_consistency().
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*
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* Over time -XX arguments may change. There are mechanisms to handle common cases:
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*
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* ALIASED: An option that is simply another name for another option. This is often
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* part of the process of deprecating a flag, but not all aliases need
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* to be deprecated.
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*
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* Create an alias for an option by adding the old and new option names to the
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* "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
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*
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* DEPRECATED: An option that is supported, but a warning is printed to let the user know that
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* support may be removed in the future. Both regular and aliased options may be
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* deprecated.
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*
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* Add a deprecation warning for an option (or alias) by adding an entry in the
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* "special_jvm_flags" table and setting the "deprecated_in" field.
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* Often an option "deprecated" in one major release will
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* be made "obsolete" in the next. In this case the entry should also have it's
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* "obsolete_in" field set.
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*
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* OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
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* on the command line. A warning is printed to let the user know that option might not
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* be accepted in the future.
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*
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* Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
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* table and setting the "obsolete_in" field.
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*
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* EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
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* to the current JDK version. The system will flatly refuse to admit the existence of
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* the flag. This allows a flag to die automatically over JDK releases.
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*
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* Note that manual cleanup of expired options should be done at major JDK version upgrades:
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* - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
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* - Newly obsolete or expired deprecated options should have their global variable
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* definitions removed (from globals.hpp, etc) and related implementations removed.
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*
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* Recommended approach for removing options:
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*
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* To remove options commonly used by customers (e.g. product, commercial -XX options), use
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* the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
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*
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* To remove internal options (e.g. diagnostic, experimental, develop options), use
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* a 2-step model adding major release numbers to the obsolete and expire columns.
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*
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* To change the name of an option, use the alias table as well as a 2-step
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* model adding major release numbers to the deprecate and expire columns.
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* Think twice about aliasing commonly used customer options.
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*
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* There are times when it is appropriate to leave a future release number as undefined.
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*
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* Tests: Aliases should be tested in VMAliasOptions.java.
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* Deprecated options should be tested in VMDeprecatedOptions.java.
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*/
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// The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
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// "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
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// When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
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// the command-line as usual, but will issue a warning.
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// When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
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// the command-line, while issuing a warning and ignoring the flag value.
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// Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
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// existence of the flag.
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//
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// MANUAL CLEANUP ON JDK VERSION UPDATES:
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// This table ensures that the handling of options will update automatically when the JDK
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// version is incremented, but the source code needs to be cleanup up manually:
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// - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
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// variable should be removed, as well as users of the variable.
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// - As "deprecated" options age into "obsolete" options, move the entry into the
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// "Obsolete Flags" section of the table.
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// - All expired options should be removed from the table.
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static SpecialFlag const special_jvm_flags[] = {
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// -------------- Deprecated Flags --------------
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// --- Non-alias flags - sorted by obsolete_in then expired_in:
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{ "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
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{ "AutoGCSelectPauseMillis", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "UseAutoGCSelectPolicy", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "ExplicitGCInvokesConcurrentAndUnloadsClasses", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
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{ "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
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// --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
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{ "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
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{ "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
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{ "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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{ "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
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// -------------- Obsolete Flags - sorted by expired_in --------------
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{ "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
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{ "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
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{ "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
#ifndef ZERO
|
|
{ "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
#endif // ZERO
|
|
{ "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "JNIDetachReleasesMonitors", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "UseAltSigs", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "SegmentedHeapDumpThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "PrintOopAddress", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
|
|
{ "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::jdk(10) },
|
|
{ "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::jdk(10) },
|
|
|
|
#ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
|
|
{ "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
|
|
{ "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
|
|
{ "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
|
|
{ "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
|
|
{ "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
{ "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
{ "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
|
|
#endif
|
|
|
|
{ NULL, JDK_Version(0), JDK_Version(0) }
|
|
};
|
|
|
|
// Flags that are aliases for other flags.
|
|
typedef struct {
|
|
const char* alias_name;
|
|
const char* real_name;
|
|
} AliasedFlag;
|
|
|
|
static AliasedFlag const aliased_jvm_flags[] = {
|
|
{ "DefaultMaxRAMFraction", "MaxRAMFraction" },
|
|
{ "CMSMarkStackSizeMax", "MarkStackSizeMax" },
|
|
{ "CMSMarkStackSize", "MarkStackSize" },
|
|
{ "G1MarkStackSize", "MarkStackSize" },
|
|
{ "ParallelMarkingThreads", "ConcGCThreads" },
|
|
{ "ParallelCMSThreads", "ConcGCThreads" },
|
|
{ "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
|
|
{ NULL, NULL}
|
|
};
|
|
|
|
// NOTE: A compatibility request will be necessary for each alias to be removed.
|
|
static AliasedLoggingFlag const aliased_logging_flags[] = {
|
|
{ "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
|
|
{ "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
|
|
{ "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
|
|
{ "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
|
|
{ "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
|
|
{ "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
|
|
{ "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
|
|
{ "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
|
|
{ "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
|
|
{ "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
|
|
{ "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
|
|
{ "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
|
|
{ "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
|
|
{ NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
|
|
};
|
|
|
|
#ifndef PRODUCT
|
|
// These options are removed in jdk9. Remove this code for jdk10.
|
|
static AliasedFlag const removed_develop_logging_flags[] = {
|
|
{ "TraceClassInitialization", "-Xlog:class+init" },
|
|
{ "TraceClassLoaderData", "-Xlog:class+loader+data" },
|
|
{ "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
|
|
{ "TraceItables", "-Xlog:itables=debug" },
|
|
{ "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
|
|
{ "TraceSafepoint", "-Xlog:safepoint=debug" },
|
|
{ "TraceStartupTime", "-Xlog:startuptime" },
|
|
{ "TraceVMOperation", "-Xlog:vmoperation=debug" },
|
|
{ "PrintVtables", "-Xlog:vtables=debug" },
|
|
{ "VerboseVerification", "-Xlog:verification" },
|
|
{ NULL, NULL }
|
|
};
|
|
#endif //PRODUCT
|
|
|
|
// Return true if "v" is less than "other", where "other" may be "undefined".
|
|
static bool version_less_than(JDK_Version v, JDK_Version other) {
|
|
assert(!v.is_undefined(), "must be defined");
|
|
if (!other.is_undefined() && v.compare(other) >= 0) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
|
|
|
|
static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
|
|
// Allow extensions to have priority
|
|
if (lookup_special_flag_ext(flag_name, flag)) {
|
|
return true;
|
|
}
|
|
|
|
for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
|
|
if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
|
|
flag = special_jvm_flags[i];
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
|
|
assert(version != NULL, "Must provide a version buffer");
|
|
SpecialFlag flag;
|
|
if (lookup_special_flag(flag_name, flag)) {
|
|
if (!flag.obsolete_in.is_undefined()) {
|
|
if (version_less_than(JDK_Version::current(), flag.expired_in)) {
|
|
*version = flag.obsolete_in;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
|
|
assert(version != NULL, "Must provide a version buffer");
|
|
SpecialFlag flag;
|
|
if (lookup_special_flag(flag_name, flag)) {
|
|
if (!flag.deprecated_in.is_undefined()) {
|
|
if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
|
|
version_less_than(JDK_Version::current(), flag.expired_in)) {
|
|
*version = flag.deprecated_in;
|
|
return 1;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
const char* Arguments::removed_develop_logging_flag_name(const char* name){
|
|
for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
|
|
const AliasedFlag& flag = removed_develop_logging_flags[i];
|
|
if (strcmp(flag.alias_name, name) == 0) {
|
|
return flag.real_name;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif // PRODUCT
|
|
|
|
const char* Arguments::real_flag_name(const char *flag_name) {
|
|
for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
|
|
const AliasedFlag& flag_status = aliased_jvm_flags[i];
|
|
if (strcmp(flag_status.alias_name, flag_name) == 0) {
|
|
return flag_status.real_name;
|
|
}
|
|
}
|
|
return flag_name;
|
|
}
|
|
|
|
#ifdef ASSERT
|
|
static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
|
|
for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
|
|
if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool verify_special_jvm_flags() {
|
|
bool success = true;
|
|
for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
|
|
const SpecialFlag& flag = special_jvm_flags[i];
|
|
if (lookup_special_flag(flag.name, i)) {
|
|
warning("Duplicate special flag declaration \"%s\"", flag.name);
|
|
success = false;
|
|
}
|
|
if (flag.deprecated_in.is_undefined() &&
|
|
flag.obsolete_in.is_undefined()) {
|
|
warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
if (!flag.deprecated_in.is_undefined()) {
|
|
if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
|
|
warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
|
|
warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
|
|
if (!flag.obsolete_in.is_undefined()) {
|
|
if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
|
|
warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
// if flag has become obsolete it should not have a "globals" flag defined anymore.
|
|
if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
|
|
if (Flag::find_flag(flag.name) != NULL) {
|
|
warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!flag.expired_in.is_undefined()) {
|
|
// if flag has become expired it should not have a "globals" flag defined anymore.
|
|
if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
|
|
if (Flag::find_flag(flag.name) != NULL) {
|
|
warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
return success;
|
|
}
|
|
#endif
|
|
|
|
// Parses a size specification string.
|
|
bool Arguments::atojulong(const char *s, julong* result) {
|
|
julong n = 0;
|
|
|
|
// First char must be a digit. Don't allow negative numbers or leading spaces.
|
|
if (!isdigit(*s)) {
|
|
return false;
|
|
}
|
|
|
|
bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
|
|
char* remainder;
|
|
errno = 0;
|
|
n = strtoull(s, &remainder, (is_hex ? 16 : 10));
|
|
if (errno != 0) {
|
|
return false;
|
|
}
|
|
|
|
// Fail if no number was read at all or if the remainder contains more than a single non-digit character.
|
|
if (remainder == s || strlen(remainder) > 1) {
|
|
return false;
|
|
}
|
|
|
|
switch (*remainder) {
|
|
case 'T': case 't':
|
|
*result = n * G * K;
|
|
// Check for overflow.
|
|
if (*result/((julong)G * K) != n) return false;
|
|
return true;
|
|
case 'G': case 'g':
|
|
*result = n * G;
|
|
if (*result/G != n) return false;
|
|
return true;
|
|
case 'M': case 'm':
|
|
*result = n * M;
|
|
if (*result/M != n) return false;
|
|
return true;
|
|
case 'K': case 'k':
|
|
*result = n * K;
|
|
if (*result/K != n) return false;
|
|
return true;
|
|
case '\0':
|
|
*result = n;
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
|
|
if (size < min_size) return arg_too_small;
|
|
// Check that size will fit in a size_t (only relevant on 32-bit)
|
|
if (size > max_uintx) return arg_too_big;
|
|
return arg_in_range;
|
|
}
|
|
|
|
// Describe an argument out of range error
|
|
void Arguments::describe_range_error(ArgsRange errcode) {
|
|
switch(errcode) {
|
|
case arg_too_big:
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The specified size exceeds the maximum "
|
|
"representable size.\n");
|
|
break;
|
|
case arg_too_small:
|
|
case arg_unreadable:
|
|
case arg_in_range:
|
|
// do nothing for now
|
|
break;
|
|
default:
|
|
ShouldNotReachHere();
|
|
}
|
|
}
|
|
|
|
static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
|
|
if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
|
|
char* end;
|
|
errno = 0;
|
|
double v = strtod(value, &end);
|
|
if ((errno != 0) || (*end != 0)) {
|
|
return false;
|
|
}
|
|
|
|
if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
|
|
julong v;
|
|
int int_v;
|
|
intx intx_v;
|
|
bool is_neg = false;
|
|
Flag* result = Flag::find_flag(name, strlen(name));
|
|
|
|
if (result == NULL) {
|
|
return false;
|
|
}
|
|
|
|
// Check the sign first since atojulong() parses only unsigned values.
|
|
if (*value == '-') {
|
|
if (!result->is_intx() && !result->is_int()) {
|
|
return false;
|
|
}
|
|
value++;
|
|
is_neg = true;
|
|
}
|
|
if (!Arguments::atojulong(value, &v)) {
|
|
return false;
|
|
}
|
|
if (result->is_int()) {
|
|
int_v = (int) v;
|
|
if (is_neg) {
|
|
int_v = -int_v;
|
|
}
|
|
return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
|
|
} else if (result->is_uint()) {
|
|
uint uint_v = (uint) v;
|
|
return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
|
|
} else if (result->is_intx()) {
|
|
intx_v = (intx) v;
|
|
if (is_neg) {
|
|
intx_v = -intx_v;
|
|
}
|
|
return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
|
|
} else if (result->is_uintx()) {
|
|
uintx uintx_v = (uintx) v;
|
|
return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
|
|
} else if (result->is_uint64_t()) {
|
|
uint64_t uint64_t_v = (uint64_t) v;
|
|
return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
|
|
} else if (result->is_size_t()) {
|
|
size_t size_t_v = (size_t) v;
|
|
return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
|
|
if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
|
|
// Contract: CommandLineFlags always returns a pointer that needs freeing.
|
|
FREE_C_HEAP_ARRAY(char, value);
|
|
return true;
|
|
}
|
|
|
|
static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
|
|
const char* old_value = "";
|
|
if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
|
|
size_t old_len = old_value != NULL ? strlen(old_value) : 0;
|
|
size_t new_len = strlen(new_value);
|
|
const char* value;
|
|
char* free_this_too = NULL;
|
|
if (old_len == 0) {
|
|
value = new_value;
|
|
} else if (new_len == 0) {
|
|
value = old_value;
|
|
} else {
|
|
size_t length = old_len + 1 + new_len + 1;
|
|
char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
|
|
// each new setting adds another LINE to the switch:
|
|
jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
|
|
value = buf;
|
|
free_this_too = buf;
|
|
}
|
|
(void) CommandLineFlags::ccstrAtPut(name, &value, origin);
|
|
// CommandLineFlags always returns a pointer that needs freeing.
|
|
FREE_C_HEAP_ARRAY(char, value);
|
|
if (free_this_too != NULL) {
|
|
// CommandLineFlags made its own copy, so I must delete my own temp. buffer.
|
|
FREE_C_HEAP_ARRAY(char, free_this_too);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
|
|
const char* real_name = real_flag_name(arg);
|
|
JDK_Version since = JDK_Version();
|
|
switch (is_deprecated_flag(arg, &since)) {
|
|
case -1:
|
|
return NULL; // obsolete or expired, don't process normally
|
|
case 0:
|
|
return real_name;
|
|
case 1: {
|
|
if (warn) {
|
|
char version[256];
|
|
since.to_string(version, sizeof(version));
|
|
if (real_name != arg) {
|
|
warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
|
|
arg, version, real_name);
|
|
} else {
|
|
warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
|
|
arg, version);
|
|
}
|
|
}
|
|
return real_name;
|
|
}
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
}
|
|
|
|
void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
|
|
LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
|
|
// Set tagset string buffer at max size of 256, large enough for any alias tagset
|
|
const int max_tagset_size = 256;
|
|
int max_tagset_len = max_tagset_size - 1;
|
|
char tagset_buffer[max_tagset_size];
|
|
tagset_buffer[0] = '\0';
|
|
|
|
// Write tag-set for aliased logging option, in string list form
|
|
int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
|
|
for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
|
|
if (i > 0) {
|
|
strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
|
|
}
|
|
strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
|
|
}
|
|
if (!alf.exactMatch) {
|
|
strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
|
|
}
|
|
log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
|
|
(on) ? "+" : "-",
|
|
name,
|
|
tagset_buffer,
|
|
(on) ? LogLevel::name(alf.level) : "off");
|
|
}
|
|
|
|
AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
|
|
for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
|
|
const AliasedLoggingFlag& alf = aliased_logging_flags[i];
|
|
if (strcmp(alf.alias_name, name) == 0) {
|
|
log_deprecated_flag(name, on, alf);
|
|
return alf;
|
|
}
|
|
}
|
|
AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
|
|
return a;
|
|
}
|
|
|
|
bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
|
|
|
|
// range of acceptable characters spelled out for portability reasons
|
|
#define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
|
|
#define BUFLEN 255
|
|
char name[BUFLEN+1];
|
|
char dummy;
|
|
const char* real_name;
|
|
bool warn_if_deprecated = true;
|
|
|
|
if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
|
|
AliasedLoggingFlag alf = catch_logging_aliases(name, false);
|
|
if (alf.alias_name != NULL){
|
|
LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
|
|
return true;
|
|
}
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
return set_bool_flag(real_name, false, origin);
|
|
}
|
|
if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
|
|
AliasedLoggingFlag alf = catch_logging_aliases(name, true);
|
|
if (alf.alias_name != NULL){
|
|
LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
|
|
return true;
|
|
}
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
return set_bool_flag(real_name, true, origin);
|
|
}
|
|
|
|
char punct;
|
|
if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
|
|
const char* value = strchr(arg, '=') + 1;
|
|
Flag* flag;
|
|
|
|
// this scanf pattern matches both strings (handled here) and numbers (handled later))
|
|
AliasedLoggingFlag alf = catch_logging_aliases(name, true);
|
|
if (alf.alias_name != NULL) {
|
|
LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
|
|
return true;
|
|
}
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
flag = Flag::find_flag(real_name);
|
|
if (flag != NULL && flag->is_ccstr()) {
|
|
if (flag->ccstr_accumulates()) {
|
|
return append_to_string_flag(real_name, value, origin);
|
|
} else {
|
|
if (value[0] == '\0') {
|
|
value = NULL;
|
|
}
|
|
return set_string_flag(real_name, value, origin);
|
|
}
|
|
} else {
|
|
warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
|
|
}
|
|
}
|
|
|
|
if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
|
|
const char* value = strchr(arg, '=') + 1;
|
|
// -XX:Foo:=xxx will reset the string flag to the given value.
|
|
if (value[0] == '\0') {
|
|
value = NULL;
|
|
}
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
return set_string_flag(real_name, value, origin);
|
|
}
|
|
|
|
#define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
|
|
#define SIGNED_NUMBER_RANGE "[-0123456789]"
|
|
#define NUMBER_RANGE "[0123456789eE+-]"
|
|
char value[BUFLEN + 1];
|
|
char value2[BUFLEN + 1];
|
|
if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
|
|
// Looks like a floating-point number -- try again with more lenient format string
|
|
if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
return set_fp_numeric_flag(real_name, value, origin);
|
|
}
|
|
}
|
|
|
|
#define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
|
|
if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
|
|
real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
|
|
if (real_name == NULL) {
|
|
return false;
|
|
}
|
|
return set_numeric_flag(real_name, value, origin);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
|
|
assert(bldarray != NULL, "illegal argument");
|
|
|
|
if (arg == NULL) {
|
|
return;
|
|
}
|
|
|
|
int new_count = *count + 1;
|
|
|
|
// expand the array and add arg to the last element
|
|
if (*bldarray == NULL) {
|
|
*bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
|
|
} else {
|
|
*bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
|
|
}
|
|
(*bldarray)[*count] = os::strdup_check_oom(arg);
|
|
*count = new_count;
|
|
}
|
|
|
|
void Arguments::build_jvm_args(const char* arg) {
|
|
add_string(&_jvm_args_array, &_num_jvm_args, arg);
|
|
}
|
|
|
|
void Arguments::build_jvm_flags(const char* arg) {
|
|
add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
|
|
}
|
|
|
|
// utility function to return a string that concatenates all
|
|
// strings in a given char** array
|
|
const char* Arguments::build_resource_string(char** args, int count) {
|
|
if (args == NULL || count == 0) {
|
|
return NULL;
|
|
}
|
|
size_t length = 0;
|
|
for (int i = 0; i < count; i++) {
|
|
length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
|
|
}
|
|
char* s = NEW_RESOURCE_ARRAY(char, length);
|
|
char* dst = s;
|
|
for (int j = 0; j < count; j++) {
|
|
size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
|
|
jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
|
|
dst += offset;
|
|
length -= offset;
|
|
}
|
|
return (const char*) s;
|
|
}
|
|
|
|
void Arguments::print_on(outputStream* st) {
|
|
st->print_cr("VM Arguments:");
|
|
if (num_jvm_flags() > 0) {
|
|
st->print("jvm_flags: "); print_jvm_flags_on(st);
|
|
st->cr();
|
|
}
|
|
if (num_jvm_args() > 0) {
|
|
st->print("jvm_args: "); print_jvm_args_on(st);
|
|
st->cr();
|
|
}
|
|
st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
|
|
if (_java_class_path != NULL) {
|
|
char* path = _java_class_path->value();
|
|
st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
|
|
}
|
|
st->print_cr("Launcher Type: %s", _sun_java_launcher);
|
|
}
|
|
|
|
void Arguments::print_summary_on(outputStream* st) {
|
|
// Print the command line. Environment variables that are helpful for
|
|
// reproducing the problem are written later in the hs_err file.
|
|
// flags are from setting file
|
|
if (num_jvm_flags() > 0) {
|
|
st->print_raw("Settings File: ");
|
|
print_jvm_flags_on(st);
|
|
st->cr();
|
|
}
|
|
// args are the command line and environment variable arguments.
|
|
st->print_raw("Command Line: ");
|
|
if (num_jvm_args() > 0) {
|
|
print_jvm_args_on(st);
|
|
}
|
|
// this is the classfile and any arguments to the java program
|
|
if (java_command() != NULL) {
|
|
st->print("%s", java_command());
|
|
}
|
|
st->cr();
|
|
}
|
|
|
|
void Arguments::print_jvm_flags_on(outputStream* st) {
|
|
if (_num_jvm_flags > 0) {
|
|
for (int i=0; i < _num_jvm_flags; i++) {
|
|
st->print("%s ", _jvm_flags_array[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Arguments::print_jvm_args_on(outputStream* st) {
|
|
if (_num_jvm_args > 0) {
|
|
for (int i=0; i < _num_jvm_args; i++) {
|
|
st->print("%s ", _jvm_args_array[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Arguments::process_argument(const char* arg,
|
|
jboolean ignore_unrecognized,
|
|
Flag::Flags origin) {
|
|
JDK_Version since = JDK_Version();
|
|
|
|
if (parse_argument(arg, origin)) {
|
|
return true;
|
|
}
|
|
|
|
// Determine if the flag has '+', '-', or '=' characters.
|
|
bool has_plus_minus = (*arg == '+' || *arg == '-');
|
|
const char* const argname = has_plus_minus ? arg + 1 : arg;
|
|
|
|
size_t arg_len;
|
|
const char* equal_sign = strchr(argname, '=');
|
|
if (equal_sign == NULL) {
|
|
arg_len = strlen(argname);
|
|
} else {
|
|
arg_len = equal_sign - argname;
|
|
}
|
|
|
|
// Only make the obsolete check for valid arguments.
|
|
if (arg_len <= BUFLEN) {
|
|
// Construct a string which consists only of the argument name without '+', '-', or '='.
|
|
char stripped_argname[BUFLEN+1]; // +1 for '\0'
|
|
jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
|
|
if (is_obsolete_flag(stripped_argname, &since)) {
|
|
char version[256];
|
|
since.to_string(version, sizeof(version));
|
|
warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
|
|
return true;
|
|
}
|
|
#ifndef PRODUCT
|
|
else {
|
|
const char* replacement;
|
|
if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
|
|
log_warning(arguments)("%s has been removed. Please use %s instead.",
|
|
stripped_argname,
|
|
replacement);
|
|
return false;
|
|
}
|
|
}
|
|
#endif //PRODUCT
|
|
}
|
|
|
|
// For locked flags, report a custom error message if available.
|
|
// Otherwise, report the standard unrecognized VM option.
|
|
Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
|
|
if (found_flag != NULL) {
|
|
char locked_message_buf[BUFLEN];
|
|
Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
|
|
if (strlen(locked_message_buf) == 0) {
|
|
if (found_flag->is_bool() && !has_plus_minus) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Missing +/- setting for VM option '%s'\n", argname);
|
|
} else if (!found_flag->is_bool() && has_plus_minus) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unexpected +/- setting in VM option '%s'\n", argname);
|
|
} else {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Improperly specified VM option '%s'\n", argname);
|
|
}
|
|
} else {
|
|
#ifdef PRODUCT
|
|
bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
|
|
(msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
|
|
if (ignore_unrecognized && mismatched) {
|
|
return true;
|
|
}
|
|
#endif
|
|
jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
|
|
}
|
|
} else {
|
|
if (ignore_unrecognized) {
|
|
return true;
|
|
}
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unrecognized VM option '%s'\n", argname);
|
|
Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
|
|
if (fuzzy_matched != NULL) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Did you mean '%s%s%s'? ",
|
|
(fuzzy_matched->is_bool()) ? "(+/-)" : "",
|
|
fuzzy_matched->_name,
|
|
(fuzzy_matched->is_bool()) ? "" : "=<value>");
|
|
}
|
|
}
|
|
|
|
// allow for commandline "commenting out" options like -XX:#+Verbose
|
|
return arg[0] == '#';
|
|
}
|
|
|
|
bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
|
|
FILE* stream = fopen(file_name, "rb");
|
|
if (stream == NULL) {
|
|
if (should_exist) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not open settings file %s\n", file_name);
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
char token[1024];
|
|
int pos = 0;
|
|
|
|
bool in_white_space = true;
|
|
bool in_comment = false;
|
|
bool in_quote = false;
|
|
char quote_c = 0;
|
|
bool result = true;
|
|
|
|
int c = getc(stream);
|
|
while(c != EOF && pos < (int)(sizeof(token)-1)) {
|
|
if (in_white_space) {
|
|
if (in_comment) {
|
|
if (c == '\n') in_comment = false;
|
|
} else {
|
|
if (c == '#') in_comment = true;
|
|
else if (!isspace(c)) {
|
|
in_white_space = false;
|
|
token[pos++] = c;
|
|
}
|
|
}
|
|
} else {
|
|
if (c == '\n' || (!in_quote && isspace(c))) {
|
|
// token ends at newline, or at unquoted whitespace
|
|
// this allows a way to include spaces in string-valued options
|
|
token[pos] = '\0';
|
|
logOption(token);
|
|
result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
|
|
build_jvm_flags(token);
|
|
pos = 0;
|
|
in_white_space = true;
|
|
in_quote = false;
|
|
} else if (!in_quote && (c == '\'' || c == '"')) {
|
|
in_quote = true;
|
|
quote_c = c;
|
|
} else if (in_quote && (c == quote_c)) {
|
|
in_quote = false;
|
|
} else {
|
|
token[pos++] = c;
|
|
}
|
|
}
|
|
c = getc(stream);
|
|
}
|
|
if (pos > 0) {
|
|
token[pos] = '\0';
|
|
result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
|
|
build_jvm_flags(token);
|
|
}
|
|
fclose(stream);
|
|
return result;
|
|
}
|
|
|
|
//=============================================================================================================
|
|
// Parsing of properties (-D)
|
|
|
|
const char* Arguments::get_property(const char* key) {
|
|
return PropertyList_get_value(system_properties(), key);
|
|
}
|
|
|
|
bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
|
|
const char* eq = strchr(prop, '=');
|
|
const char* key;
|
|
const char* value = "";
|
|
|
|
if (eq == NULL) {
|
|
// property doesn't have a value, thus use passed string
|
|
key = prop;
|
|
} else {
|
|
// property have a value, thus extract it and save to the
|
|
// allocated string
|
|
size_t key_len = eq - prop;
|
|
char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
|
|
|
|
jio_snprintf(tmp_key, key_len + 1, "%s", prop);
|
|
key = tmp_key;
|
|
|
|
value = &prop[key_len + 1];
|
|
}
|
|
|
|
if (strcmp(key, "java.compiler") == 0) {
|
|
process_java_compiler_argument(value);
|
|
// Record value in Arguments, but let it get passed to Java.
|
|
} else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
|
|
strcmp(key, "sun.java.launcher.pid") == 0) {
|
|
// sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
|
|
// private and are processed in process_sun_java_launcher_properties();
|
|
// the sun.java.launcher property is passed on to the java application
|
|
} else if (strcmp(key, "sun.boot.library.path") == 0) {
|
|
// append is true, writable is true, internal is false
|
|
PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
|
|
WriteableProperty, ExternalProperty);
|
|
} else {
|
|
if (strcmp(key, "sun.java.command") == 0) {
|
|
char *old_java_command = _java_command;
|
|
_java_command = os::strdup_check_oom(value, mtArguments);
|
|
if (old_java_command != NULL) {
|
|
os::free(old_java_command);
|
|
}
|
|
} else if (strcmp(key, "java.vendor.url.bug") == 0) {
|
|
const char* old_java_vendor_url_bug = _java_vendor_url_bug;
|
|
// save it in _java_vendor_url_bug, so JVM fatal error handler can access
|
|
// its value without going through the property list or making a Java call.
|
|
_java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
|
|
if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
|
|
assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
|
|
os::free((void *)old_java_vendor_url_bug);
|
|
}
|
|
}
|
|
|
|
// Create new property and add at the end of the list
|
|
PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
|
|
}
|
|
|
|
if (key != prop) {
|
|
// SystemProperty copy passed value, thus free previously allocated
|
|
// memory
|
|
FreeHeap((void *)key);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#if INCLUDE_CDS
|
|
void Arguments::check_unsupported_dumping_properties() {
|
|
assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
|
|
const char* unsupported_properties[] = { "jdk.module.main",
|
|
"jdk.module.limitmods",
|
|
"jdk.module.path",
|
|
"jdk.module.upgrade.path",
|
|
"jdk.module.addmods.0",
|
|
"jdk.module.patch.0" };
|
|
const char* unsupported_options[] = { "-m", // cannot use at dump time
|
|
"--limit-modules", // ignored at dump time
|
|
"--module-path", // ignored at dump time
|
|
"--upgrade-module-path", // ignored at dump time
|
|
"--add-modules", // ignored at dump time
|
|
"--patch-module" // ignored at dump time
|
|
};
|
|
assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
|
|
// If a vm option is found in the unsupported_options array with index less than the info_idx,
|
|
// vm will exit with an error message. Otherwise, it will print an informational message if
|
|
// PrintSharedSpaces is enabled.
|
|
uint info_idx = 1;
|
|
SystemProperty* sp = system_properties();
|
|
while (sp != NULL) {
|
|
for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
|
|
if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
|
|
if (i < info_idx) {
|
|
vm_exit_during_initialization(
|
|
"Cannot use the following option when dumping the shared archive", unsupported_options[i]);
|
|
} else {
|
|
if (PrintSharedSpaces) {
|
|
tty->print_cr(
|
|
"Info: the %s option is ignored when dumping the shared archive", unsupported_options[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
sp = sp->next();
|
|
}
|
|
|
|
// Check for an exploded module build in use with -Xshare:dump.
|
|
if (!has_jimage()) {
|
|
vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
//===========================================================================================================
|
|
// Setting int/mixed/comp mode flags
|
|
|
|
void Arguments::set_mode_flags(Mode mode) {
|
|
// Set up default values for all flags.
|
|
// If you add a flag to any of the branches below,
|
|
// add a default value for it here.
|
|
set_java_compiler(false);
|
|
_mode = mode;
|
|
|
|
// Ensure Agent_OnLoad has the correct initial values.
|
|
// This may not be the final mode; mode may change later in onload phase.
|
|
PropertyList_unique_add(&_system_properties, "java.vm.info",
|
|
VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
|
|
|
|
UseInterpreter = true;
|
|
UseCompiler = true;
|
|
UseLoopCounter = true;
|
|
|
|
// Default values may be platform/compiler dependent -
|
|
// use the saved values
|
|
ClipInlining = Arguments::_ClipInlining;
|
|
AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
|
|
UseOnStackReplacement = Arguments::_UseOnStackReplacement;
|
|
BackgroundCompilation = Arguments::_BackgroundCompilation;
|
|
if (TieredCompilation) {
|
|
if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
|
|
Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
|
|
}
|
|
if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
|
|
Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
|
|
}
|
|
}
|
|
|
|
// Change from defaults based on mode
|
|
switch (mode) {
|
|
default:
|
|
ShouldNotReachHere();
|
|
break;
|
|
case _int:
|
|
UseCompiler = false;
|
|
UseLoopCounter = false;
|
|
AlwaysCompileLoopMethods = false;
|
|
UseOnStackReplacement = false;
|
|
break;
|
|
case _mixed:
|
|
// same as default
|
|
break;
|
|
case _comp:
|
|
UseInterpreter = false;
|
|
BackgroundCompilation = false;
|
|
ClipInlining = false;
|
|
// Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
|
|
// We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
|
|
// compile a level 4 (C2) and then continue executing it.
|
|
if (TieredCompilation) {
|
|
Tier3InvokeNotifyFreqLog = 0;
|
|
Tier4InvocationThreshold = 0;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Conflict: required to use shared spaces (-Xshare:on), but
|
|
// incompatible command line options were chosen.
|
|
static void no_shared_spaces(const char* message) {
|
|
if (RequireSharedSpaces) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Class data sharing is inconsistent with other specified options.\n");
|
|
vm_exit_during_initialization("Unable to use shared archive.", message);
|
|
} else {
|
|
FLAG_SET_DEFAULT(UseSharedSpaces, false);
|
|
}
|
|
}
|
|
|
|
// Returns threshold scaled with the value of scale.
|
|
// If scale < 0.0, threshold is returned without scaling.
|
|
intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
|
|
if (scale == 1.0 || scale < 0.0) {
|
|
return threshold;
|
|
} else {
|
|
return (intx)(threshold * scale);
|
|
}
|
|
}
|
|
|
|
// Returns freq_log scaled with the value of scale.
|
|
// Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
|
|
// If scale < 0.0, freq_log is returned without scaling.
|
|
intx Arguments::scaled_freq_log(intx freq_log, double scale) {
|
|
// Check if scaling is necessary or if negative value was specified.
|
|
if (scale == 1.0 || scale < 0.0) {
|
|
return freq_log;
|
|
}
|
|
// Check values to avoid calculating log2 of 0.
|
|
if (scale == 0.0 || freq_log == 0) {
|
|
return 0;
|
|
}
|
|
// Determine the maximum notification frequency value currently supported.
|
|
// The largest mask value that the interpreter/C1 can handle is
|
|
// of length InvocationCounter::number_of_count_bits. Mask values are always
|
|
// one bit shorter then the value of the notification frequency. Set
|
|
// max_freq_bits accordingly.
|
|
intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
|
|
intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
|
|
if (scaled_freq == 0) {
|
|
// Return 0 right away to avoid calculating log2 of 0.
|
|
return 0;
|
|
} else if (scaled_freq > nth_bit(max_freq_bits)) {
|
|
return max_freq_bits;
|
|
} else {
|
|
return log2_intptr(scaled_freq);
|
|
}
|
|
}
|
|
|
|
void Arguments::set_tiered_flags() {
|
|
// With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
|
|
if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
|
|
FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
|
|
}
|
|
if (CompilationPolicyChoice < 2) {
|
|
vm_exit_during_initialization(
|
|
"Incompatible compilation policy selected", NULL);
|
|
}
|
|
// Increase the code cache size - tiered compiles a lot more.
|
|
if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
|
|
FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
|
|
MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
|
|
}
|
|
// Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
|
|
if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
|
|
FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
|
|
}
|
|
if (!UseInterpreter) { // -Xcomp
|
|
Tier3InvokeNotifyFreqLog = 0;
|
|
Tier4InvocationThreshold = 0;
|
|
}
|
|
|
|
if (CompileThresholdScaling < 0) {
|
|
vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
|
|
}
|
|
|
|
// Scale tiered compilation thresholds.
|
|
// CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
|
|
if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
|
|
FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
|
|
FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
|
|
|
|
FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
|
|
FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
|
|
FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
|
|
FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
|
|
|
|
// Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
|
|
// once these thresholds become supported.
|
|
|
|
FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
|
|
FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
|
|
|
|
FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
|
|
FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
|
|
|
|
FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
|
|
|
|
FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
|
|
FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
|
|
FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
|
|
FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
|
|
}
|
|
}
|
|
|
|
#if INCLUDE_ALL_GCS
|
|
static void disable_adaptive_size_policy(const char* collector_name) {
|
|
if (UseAdaptiveSizePolicy) {
|
|
if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
|
|
warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
|
|
collector_name);
|
|
}
|
|
FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
|
|
}
|
|
}
|
|
|
|
void Arguments::set_parnew_gc_flags() {
|
|
assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
|
|
"control point invariant");
|
|
assert(UseConcMarkSweepGC, "CMS is expected to be on here");
|
|
assert(UseParNewGC, "ParNew should always be used with CMS");
|
|
|
|
if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
|
|
FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
|
|
assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
|
|
} else if (ParallelGCThreads == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
|
|
vm_exit(1);
|
|
}
|
|
|
|
// By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
|
|
// these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
|
|
// we set them to 1024 and 1024.
|
|
// See CR 6362902.
|
|
if (FLAG_IS_DEFAULT(YoungPLABSize)) {
|
|
FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
|
|
}
|
|
if (FLAG_IS_DEFAULT(OldPLABSize)) {
|
|
FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
|
|
}
|
|
|
|
// When using compressed oops, we use local overflow stacks,
|
|
// rather than using a global overflow list chained through
|
|
// the klass word of the object's pre-image.
|
|
if (UseCompressedOops && !ParGCUseLocalOverflow) {
|
|
if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
|
|
warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
|
|
}
|
|
FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
|
|
}
|
|
assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
|
|
}
|
|
|
|
// Adjust some sizes to suit CMS and/or ParNew needs; these work well on
|
|
// sparc/solaris for certain applications, but would gain from
|
|
// further optimization and tuning efforts, and would almost
|
|
// certainly gain from analysis of platform and environment.
|
|
void Arguments::set_cms_and_parnew_gc_flags() {
|
|
assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
|
|
assert(UseConcMarkSweepGC, "CMS is expected to be on here");
|
|
assert(UseParNewGC, "ParNew should always be used with CMS");
|
|
|
|
// Turn off AdaptiveSizePolicy by default for cms until it is complete.
|
|
disable_adaptive_size_policy("UseConcMarkSweepGC");
|
|
|
|
set_parnew_gc_flags();
|
|
|
|
size_t max_heap = align_size_down(MaxHeapSize,
|
|
CardTableRS::ct_max_alignment_constraint());
|
|
|
|
// Now make adjustments for CMS
|
|
intx tenuring_default = (intx)6;
|
|
size_t young_gen_per_worker = CMSYoungGenPerWorker;
|
|
|
|
// Preferred young gen size for "short" pauses:
|
|
// upper bound depends on # of threads and NewRatio.
|
|
const size_t preferred_max_new_size_unaligned =
|
|
MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
|
|
size_t preferred_max_new_size =
|
|
align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
|
|
|
|
// Unless explicitly requested otherwise, size young gen
|
|
// for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
|
|
|
|
// If either MaxNewSize or NewRatio is set on the command line,
|
|
// assume the user is trying to set the size of the young gen.
|
|
if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
|
|
|
|
// Set MaxNewSize to our calculated preferred_max_new_size unless
|
|
// NewSize was set on the command line and it is larger than
|
|
// preferred_max_new_size.
|
|
if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
|
|
FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
|
|
} else {
|
|
FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
|
|
}
|
|
log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
|
|
|
|
// Code along this path potentially sets NewSize and OldSize
|
|
log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT,
|
|
min_heap_size(), InitialHeapSize, max_heap);
|
|
size_t min_new = preferred_max_new_size;
|
|
if (FLAG_IS_CMDLINE(NewSize)) {
|
|
min_new = NewSize;
|
|
}
|
|
if (max_heap > min_new && min_heap_size() > min_new) {
|
|
// Unless explicitly requested otherwise, make young gen
|
|
// at least min_new, and at most preferred_max_new_size.
|
|
if (FLAG_IS_DEFAULT(NewSize)) {
|
|
FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
|
|
FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
|
|
log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
|
|
}
|
|
// Unless explicitly requested otherwise, size old gen
|
|
// so it's NewRatio x of NewSize.
|
|
if (FLAG_IS_DEFAULT(OldSize)) {
|
|
if (max_heap > NewSize) {
|
|
FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
|
|
log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Unless explicitly requested otherwise, definitely
|
|
// promote all objects surviving "tenuring_default" scavenges.
|
|
if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
|
|
FLAG_IS_DEFAULT(SurvivorRatio)) {
|
|
FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
|
|
}
|
|
// If we decided above (or user explicitly requested)
|
|
// `promote all' (via MaxTenuringThreshold := 0),
|
|
// prefer minuscule survivor spaces so as not to waste
|
|
// space for (non-existent) survivors
|
|
if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
|
|
FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
|
|
}
|
|
|
|
// OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
|
|
// but rather the number of free blocks of a given size that are used when
|
|
// replenishing the local per-worker free list caches.
|
|
if (FLAG_IS_DEFAULT(OldPLABSize)) {
|
|
if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
|
|
// OldPLAB sizing manually turned off: Use a larger default setting,
|
|
// unless it was manually specified. This is because a too-low value
|
|
// will slow down scavenges.
|
|
FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166
|
|
} else {
|
|
FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
|
|
}
|
|
}
|
|
|
|
// If either of the static initialization defaults have changed, note this
|
|
// modification.
|
|
if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
|
|
CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight);
|
|
}
|
|
|
|
log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
|
|
}
|
|
#endif // INCLUDE_ALL_GCS
|
|
|
|
void set_object_alignment() {
|
|
// Object alignment.
|
|
assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
|
|
MinObjAlignmentInBytes = ObjectAlignmentInBytes;
|
|
assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
|
|
MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
|
|
assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
|
|
MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
|
|
|
|
LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
|
|
LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
|
|
|
|
// Oop encoding heap max
|
|
OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
|
|
|
|
if (SurvivorAlignmentInBytes == 0) {
|
|
SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
|
|
}
|
|
|
|
#if INCLUDE_ALL_GCS
|
|
// Set CMS global values
|
|
CompactibleFreeListSpace::set_cms_values();
|
|
#endif // INCLUDE_ALL_GCS
|
|
}
|
|
|
|
size_t Arguments::max_heap_for_compressed_oops() {
|
|
// Avoid sign flip.
|
|
assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
|
|
// We need to fit both the NULL page and the heap into the memory budget, while
|
|
// keeping alignment constraints of the heap. To guarantee the latter, as the
|
|
// NULL page is located before the heap, we pad the NULL page to the conservative
|
|
// maximum alignment that the GC may ever impose upon the heap.
|
|
size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
|
|
_conservative_max_heap_alignment);
|
|
|
|
LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
|
|
NOT_LP64(ShouldNotReachHere(); return 0);
|
|
}
|
|
|
|
bool Arguments::should_auto_select_low_pause_collector() {
|
|
if (UseAutoGCSelectPolicy &&
|
|
!FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
|
|
(MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
|
|
log_trace(gc)("Automatic selection of the low pause collector based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Arguments::set_use_compressed_oops() {
|
|
#ifndef ZERO
|
|
#ifdef _LP64
|
|
// MaxHeapSize is not set up properly at this point, but
|
|
// the only value that can override MaxHeapSize if we are
|
|
// to use UseCompressedOops is InitialHeapSize.
|
|
size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
|
|
|
|
if (max_heap_size <= max_heap_for_compressed_oops()) {
|
|
#if !defined(COMPILER1) || defined(TIERED)
|
|
if (FLAG_IS_DEFAULT(UseCompressedOops)) {
|
|
FLAG_SET_ERGO(bool, UseCompressedOops, true);
|
|
}
|
|
#endif
|
|
} else {
|
|
if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
|
|
warning("Max heap size too large for Compressed Oops");
|
|
FLAG_SET_DEFAULT(UseCompressedOops, false);
|
|
FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
|
|
}
|
|
}
|
|
#endif // _LP64
|
|
#endif // ZERO
|
|
}
|
|
|
|
|
|
// NOTE: set_use_compressed_klass_ptrs() must be called after calling
|
|
// set_use_compressed_oops().
|
|
void Arguments::set_use_compressed_klass_ptrs() {
|
|
#ifndef ZERO
|
|
#ifdef _LP64
|
|
// UseCompressedOops must be on for UseCompressedClassPointers to be on.
|
|
if (!UseCompressedOops) {
|
|
if (UseCompressedClassPointers) {
|
|
warning("UseCompressedClassPointers requires UseCompressedOops");
|
|
}
|
|
FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
|
|
} else {
|
|
// Turn on UseCompressedClassPointers too
|
|
if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
|
|
FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
|
|
}
|
|
// Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
|
|
if (UseCompressedClassPointers) {
|
|
if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
|
|
warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
|
|
FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
|
|
}
|
|
}
|
|
}
|
|
#endif // _LP64
|
|
#endif // !ZERO
|
|
}
|
|
|
|
void Arguments::set_conservative_max_heap_alignment() {
|
|
// The conservative maximum required alignment for the heap is the maximum of
|
|
// the alignments imposed by several sources: any requirements from the heap
|
|
// itself, the collector policy and the maximum page size we may run the VM
|
|
// with.
|
|
size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
|
|
#if INCLUDE_ALL_GCS
|
|
if (UseParallelGC) {
|
|
heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
|
|
} else if (UseG1GC) {
|
|
heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
|
|
}
|
|
#endif // INCLUDE_ALL_GCS
|
|
_conservative_max_heap_alignment = MAX4(heap_alignment,
|
|
(size_t)os::vm_allocation_granularity(),
|
|
os::max_page_size(),
|
|
CollectorPolicy::compute_heap_alignment());
|
|
}
|
|
|
|
bool Arguments::gc_selected() {
|
|
#if INCLUDE_ALL_GCS
|
|
return UseSerialGC || UseParallelGC || UseParallelOldGC || UseConcMarkSweepGC || UseG1GC;
|
|
#else
|
|
return UseSerialGC;
|
|
#endif // INCLUDE_ALL_GCS
|
|
}
|
|
|
|
#ifdef TIERED
|
|
bool Arguments::compilation_mode_selected() {
|
|
return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
|
|
!FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
|
|
|
|
}
|
|
|
|
void Arguments::select_compilation_mode_ergonomically() {
|
|
#if defined(_WINDOWS) && !defined(_LP64)
|
|
if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
|
|
FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
|
|
}
|
|
#endif
|
|
if (NeverActAsServerClassMachine) {
|
|
set_client_compilation_mode();
|
|
}
|
|
}
|
|
#endif //TIERED
|
|
|
|
void Arguments::select_gc_ergonomically() {
|
|
#if INCLUDE_ALL_GCS
|
|
if (os::is_server_class_machine()) {
|
|
if (!UseAutoGCSelectPolicy) {
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true);
|
|
} else {
|
|
if (should_auto_select_low_pause_collector()) {
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseConcMarkSweepGC, true);
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseParNewGC, true);
|
|
} else {
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseParallelGC, true);
|
|
}
|
|
}
|
|
} else {
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
|
|
}
|
|
#else
|
|
UNSUPPORTED_OPTION(UseG1GC);
|
|
UNSUPPORTED_OPTION(UseParallelGC);
|
|
UNSUPPORTED_OPTION(UseParallelOldGC);
|
|
UNSUPPORTED_OPTION(UseConcMarkSweepGC);
|
|
UNSUPPORTED_OPTION(UseParNewGC);
|
|
FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
|
|
#endif // INCLUDE_ALL_GCS
|
|
}
|
|
|
|
void Arguments::select_gc() {
|
|
if (!gc_selected()) {
|
|
select_gc_ergonomically();
|
|
if (!gc_selected()) {
|
|
vm_exit_during_initialization("Garbage collector not selected (default collector explicitly disabled)", NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
#if INCLUDE_JVMCI
|
|
void Arguments::set_jvmci_specific_flags() {
|
|
if (UseJVMCICompiler) {
|
|
if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
|
|
FLAG_SET_DEFAULT(TypeProfileWidth, 8);
|
|
}
|
|
if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
|
|
FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
|
|
}
|
|
if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
|
|
FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
|
|
}
|
|
if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
|
|
FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
|
|
}
|
|
if (FLAG_IS_DEFAULT(MetaspaceSize)) {
|
|
FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
|
|
}
|
|
if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
|
|
FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
|
|
}
|
|
if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
|
|
FLAG_SET_DEFAULT(TypeProfileLevel, 0);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void Arguments::set_ergonomics_flags() {
|
|
#ifdef TIERED
|
|
if (!compilation_mode_selected()) {
|
|
select_compilation_mode_ergonomically();
|
|
}
|
|
#endif
|
|
select_gc();
|
|
|
|
#if defined(COMPILER2) || INCLUDE_JVMCI
|
|
// Shared spaces work fine with other GCs but causes bytecode rewriting
|
|
// to be disabled, which hurts interpreter performance and decreases
|
|
// server performance. When -server is specified, keep the default off
|
|
// unless it is asked for. Future work: either add bytecode rewriting
|
|
// at link time, or rewrite bytecodes in non-shared methods.
|
|
if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces &&
|
|
(FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
|
|
no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
|
|
}
|
|
#endif
|
|
|
|
set_conservative_max_heap_alignment();
|
|
|
|
#ifndef ZERO
|
|
#ifdef _LP64
|
|
set_use_compressed_oops();
|
|
|
|
// set_use_compressed_klass_ptrs() must be called after calling
|
|
// set_use_compressed_oops().
|
|
set_use_compressed_klass_ptrs();
|
|
|
|
// Also checks that certain machines are slower with compressed oops
|
|
// in vm_version initialization code.
|
|
#endif // _LP64
|
|
#endif // !ZERO
|
|
|
|
}
|
|
|
|
void Arguments::set_parallel_gc_flags() {
|
|
assert(UseParallelGC || UseParallelOldGC, "Error");
|
|
// Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
|
|
if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
|
|
FLAG_SET_DEFAULT(UseParallelOldGC, true);
|
|
}
|
|
FLAG_SET_DEFAULT(UseParallelGC, true);
|
|
|
|
// If no heap maximum was requested explicitly, use some reasonable fraction
|
|
// of the physical memory, up to a maximum of 1GB.
|
|
FLAG_SET_DEFAULT(ParallelGCThreads,
|
|
Abstract_VM_Version::parallel_worker_threads());
|
|
if (ParallelGCThreads == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
|
|
vm_exit(1);
|
|
}
|
|
|
|
if (UseAdaptiveSizePolicy) {
|
|
// We don't want to limit adaptive heap sizing's freedom to adjust the heap
|
|
// unless the user actually sets these flags.
|
|
if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
|
|
FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
|
|
}
|
|
if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
|
|
FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
|
|
}
|
|
}
|
|
|
|
// If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
|
|
// SurvivorRatio has been set, reset their default values to SurvivorRatio +
|
|
// 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
|
|
// See CR 6362902 for details.
|
|
if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
|
|
if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
|
|
FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
|
|
}
|
|
if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
|
|
FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
|
|
}
|
|
}
|
|
|
|
if (UseParallelOldGC) {
|
|
// Par compact uses lower default values since they are treated as
|
|
// minimums. These are different defaults because of the different
|
|
// interpretation and are not ergonomically set.
|
|
if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
|
|
FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Arguments::set_g1_gc_flags() {
|
|
assert(UseG1GC, "Error");
|
|
#if defined(COMPILER1) || INCLUDE_JVMCI
|
|
FastTLABRefill = false;
|
|
#endif
|
|
FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
|
|
if (ParallelGCThreads == 0) {
|
|
assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
|
|
vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
|
|
}
|
|
|
|
#if INCLUDE_ALL_GCS
|
|
if (FLAG_IS_DEFAULT(G1ConcRefinementThreads)) {
|
|
FLAG_SET_ERGO(uint, G1ConcRefinementThreads, ParallelGCThreads);
|
|
}
|
|
#endif
|
|
|
|
// MarkStackSize will be set (if it hasn't been set by the user)
|
|
// when concurrent marking is initialized.
|
|
// Its value will be based upon the number of parallel marking threads.
|
|
// But we do set the maximum mark stack size here.
|
|
if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
|
|
FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
|
|
}
|
|
|
|
if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
|
|
// In G1, we want the default GC overhead goal to be higher than
|
|
// it is for PS, or the heap might be expanded too aggressively.
|
|
// We set it here to ~8%.
|
|
FLAG_SET_DEFAULT(GCTimeRatio, 12);
|
|
}
|
|
|
|
// Below, we might need to calculate the pause time interval based on
|
|
// the pause target. When we do so we are going to give G1 maximum
|
|
// flexibility and allow it to do pauses when it needs to. So, we'll
|
|
// arrange that the pause interval to be pause time target + 1 to
|
|
// ensure that a) the pause time target is maximized with respect to
|
|
// the pause interval and b) we maintain the invariant that pause
|
|
// time target < pause interval. If the user does not want this
|
|
// maximum flexibility, they will have to set the pause interval
|
|
// explicitly.
|
|
|
|
if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
|
|
// The default pause time target in G1 is 200ms
|
|
FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
|
|
}
|
|
|
|
// Then, if the interval parameter was not set, set it according to
|
|
// the pause time target (this will also deal with the case when the
|
|
// pause time target is the default value).
|
|
if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
|
|
FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
|
|
}
|
|
|
|
log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
|
|
}
|
|
|
|
void Arguments::set_gc_specific_flags() {
|
|
#if INCLUDE_ALL_GCS
|
|
// Set per-collector flags
|
|
if (UseParallelGC || UseParallelOldGC) {
|
|
set_parallel_gc_flags();
|
|
} else if (UseConcMarkSweepGC) {
|
|
set_cms_and_parnew_gc_flags();
|
|
} else if (UseG1GC) {
|
|
set_g1_gc_flags();
|
|
}
|
|
if (AssumeMP && !UseSerialGC) {
|
|
if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
|
|
warning("If the number of processors is expected to increase from one, then"
|
|
" you should configure the number of parallel GC threads appropriately"
|
|
" using -XX:ParallelGCThreads=N");
|
|
}
|
|
}
|
|
if (MinHeapFreeRatio == 100) {
|
|
// Keeping the heap 100% free is hard ;-) so limit it to 99%.
|
|
FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
|
|
}
|
|
|
|
// If class unloading is disabled, also disable concurrent class unloading.
|
|
if (!ClassUnloading) {
|
|
FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
|
|
FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
|
|
FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
|
|
}
|
|
#endif // INCLUDE_ALL_GCS
|
|
}
|
|
|
|
julong Arguments::limit_by_allocatable_memory(julong limit) {
|
|
julong max_allocatable;
|
|
julong result = limit;
|
|
if (os::has_allocatable_memory_limit(&max_allocatable)) {
|
|
result = MIN2(result, max_allocatable / MaxVirtMemFraction);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Use static initialization to get the default before parsing
|
|
static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
|
|
|
|
void Arguments::set_heap_size() {
|
|
julong phys_mem =
|
|
FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
|
|
: (julong)MaxRAM;
|
|
|
|
// Experimental support for CGroup memory limits
|
|
if (UseCGroupMemoryLimitForHeap) {
|
|
// This is a rough indicator that a CGroup limit may be in force
|
|
// for this process
|
|
const char* lim_file = "/sys/fs/cgroup/memory/memory.limit_in_bytes";
|
|
FILE *fp = fopen(lim_file, "r");
|
|
if (fp != NULL) {
|
|
julong cgroup_max = 0;
|
|
int ret = fscanf(fp, JULONG_FORMAT, &cgroup_max);
|
|
if (ret == 1 && cgroup_max > 0) {
|
|
// If unlimited, cgroup_max will be a very large, but unspecified
|
|
// value, so use initial phys_mem as a limit
|
|
log_info(gc, heap)("Setting phys_mem to the min of cgroup limit ("
|
|
JULONG_FORMAT "MB) and initial phys_mem ("
|
|
JULONG_FORMAT "MB)", cgroup_max/M, phys_mem/M);
|
|
phys_mem = MIN2(cgroup_max, phys_mem);
|
|
} else {
|
|
warning("Unable to read/parse cgroup memory limit from %s: %s",
|
|
lim_file, errno != 0 ? strerror(errno) : "unknown error");
|
|
}
|
|
fclose(fp);
|
|
} else {
|
|
warning("Unable to open cgroup memory limit file %s (%s)", lim_file, strerror(errno));
|
|
}
|
|
}
|
|
|
|
// If the maximum heap size has not been set with -Xmx,
|
|
// then set it as fraction of the size of physical memory,
|
|
// respecting the maximum and minimum sizes of the heap.
|
|
if (FLAG_IS_DEFAULT(MaxHeapSize)) {
|
|
julong reasonable_max = phys_mem / MaxRAMFraction;
|
|
|
|
if (phys_mem <= MaxHeapSize * MinRAMFraction) {
|
|
// Small physical memory, so use a minimum fraction of it for the heap
|
|
reasonable_max = phys_mem / MinRAMFraction;
|
|
} else {
|
|
// Not-small physical memory, so require a heap at least
|
|
// as large as MaxHeapSize
|
|
reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
|
|
}
|
|
if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
|
|
// Limit the heap size to ErgoHeapSizeLimit
|
|
reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
|
|
}
|
|
if (UseCompressedOops) {
|
|
// Limit the heap size to the maximum possible when using compressed oops
|
|
julong max_coop_heap = (julong)max_heap_for_compressed_oops();
|
|
|
|
// HeapBaseMinAddress can be greater than default but not less than.
|
|
if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
|
|
if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
|
|
// matches compressed oops printing flags
|
|
log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
|
|
" (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
|
|
DefaultHeapBaseMinAddress,
|
|
DefaultHeapBaseMinAddress/G,
|
|
HeapBaseMinAddress);
|
|
FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
|
|
}
|
|
}
|
|
|
|
if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
|
|
// Heap should be above HeapBaseMinAddress to get zero based compressed oops
|
|
// but it should be not less than default MaxHeapSize.
|
|
max_coop_heap -= HeapBaseMinAddress;
|
|
}
|
|
reasonable_max = MIN2(reasonable_max, max_coop_heap);
|
|
}
|
|
reasonable_max = limit_by_allocatable_memory(reasonable_max);
|
|
|
|
if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
|
|
// An initial heap size was specified on the command line,
|
|
// so be sure that the maximum size is consistent. Done
|
|
// after call to limit_by_allocatable_memory because that
|
|
// method might reduce the allocation size.
|
|
reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
|
|
}
|
|
|
|
log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
|
|
FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
|
|
}
|
|
|
|
// If the minimum or initial heap_size have not been set or requested to be set
|
|
// ergonomically, set them accordingly.
|
|
if (InitialHeapSize == 0 || min_heap_size() == 0) {
|
|
julong reasonable_minimum = (julong)(OldSize + NewSize);
|
|
|
|
reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
|
|
|
|
reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
|
|
|
|
if (InitialHeapSize == 0) {
|
|
julong reasonable_initial = phys_mem / InitialRAMFraction;
|
|
|
|
reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
|
|
reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
|
|
|
|
reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
|
|
|
|
log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
|
|
FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
|
|
}
|
|
// If the minimum heap size has not been set (via -Xms),
|
|
// synchronize with InitialHeapSize to avoid errors with the default value.
|
|
if (min_heap_size() == 0) {
|
|
set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
|
|
log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
|
|
}
|
|
}
|
|
}
|
|
|
|
// This option inspects the machine and attempts to set various
|
|
// parameters to be optimal for long-running, memory allocation
|
|
// intensive jobs. It is intended for machines with large
|
|
// amounts of cpu and memory.
|
|
jint Arguments::set_aggressive_heap_flags() {
|
|
// initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
|
|
// VM, but we may not be able to represent the total physical memory
|
|
// available (like having 8gb of memory on a box but using a 32bit VM).
|
|
// Thus, we need to make sure we're using a julong for intermediate
|
|
// calculations.
|
|
julong initHeapSize;
|
|
julong total_memory = os::physical_memory();
|
|
|
|
if (total_memory < (julong) 256 * M) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
|
|
vm_exit(1);
|
|
}
|
|
|
|
// The heap size is half of available memory, or (at most)
|
|
// all of possible memory less 160mb (leaving room for the OS
|
|
// when using ISM). This is the maximum; because adaptive sizing
|
|
// is turned on below, the actual space used may be smaller.
|
|
|
|
initHeapSize = MIN2(total_memory / (julong) 2,
|
|
total_memory - (julong) 160 * M);
|
|
|
|
initHeapSize = limit_by_allocatable_memory(initHeapSize);
|
|
|
|
if (FLAG_IS_DEFAULT(MaxHeapSize)) {
|
|
if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// Currently the minimum size and the initial heap sizes are the same.
|
|
set_min_heap_size(initHeapSize);
|
|
}
|
|
if (FLAG_IS_DEFAULT(NewSize)) {
|
|
// Make the young generation 3/8ths of the total heap.
|
|
if (FLAG_SET_CMDLINE(size_t, NewSize,
|
|
((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
|
|
#if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
|
|
FLAG_SET_DEFAULT(UseLargePages, true);
|
|
#endif
|
|
|
|
// Increase some data structure sizes for efficiency
|
|
if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// See the OldPLABSize comment below, but replace 'after promotion'
|
|
// with 'after copying'. YoungPLABSize is the size of the survivor
|
|
// space per-gc-thread buffers. The default is 4kw.
|
|
if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// OldPLABSize is the size of the buffers in the old gen that
|
|
// UseParallelGC uses to promote live data that doesn't fit in the
|
|
// survivor spaces. At any given time, there's one for each gc thread.
|
|
// The default size is 1kw. These buffers are rarely used, since the
|
|
// survivor spaces are usually big enough. For specjbb, however, there
|
|
// are occasions when there's lots of live data in the young gen
|
|
// and we end up promoting some of it. We don't have a definite
|
|
// explanation for why bumping OldPLABSize helps, but the theory
|
|
// is that a bigger PLAB results in retaining something like the
|
|
// original allocation order after promotion, which improves mutator
|
|
// locality. A minor effect may be that larger PLABs reduce the
|
|
// number of PLAB allocation events during gc. The value of 8kw
|
|
// was arrived at by experimenting with specjbb.
|
|
if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Enable parallel GC and adaptive generation sizing
|
|
if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
FLAG_SET_DEFAULT(ParallelGCThreads,
|
|
Abstract_VM_Version::parallel_worker_threads());
|
|
|
|
// Encourage steady state memory management
|
|
if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// This appears to improve mutator locality
|
|
if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Get around early Solaris scheduling bug
|
|
// (affinity vs other jobs on system)
|
|
// but disallow DR and offlining (5008695).
|
|
if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
// This must be called after ergonomics.
|
|
void Arguments::set_bytecode_flags() {
|
|
if (!RewriteBytecodes) {
|
|
FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
|
|
}
|
|
}
|
|
|
|
// Aggressive optimization flags -XX:+AggressiveOpts
|
|
jint Arguments::set_aggressive_opts_flags() {
|
|
#ifdef COMPILER2
|
|
if (AggressiveUnboxing) {
|
|
if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
|
|
FLAG_SET_DEFAULT(EliminateAutoBox, true);
|
|
} else if (!EliminateAutoBox) {
|
|
// warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
|
|
AggressiveUnboxing = false;
|
|
}
|
|
if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
|
|
FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
|
|
} else if (!DoEscapeAnalysis) {
|
|
// warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
|
|
AggressiveUnboxing = false;
|
|
}
|
|
}
|
|
if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
|
|
if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
|
|
FLAG_SET_DEFAULT(EliminateAutoBox, true);
|
|
}
|
|
if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
|
|
FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
|
|
}
|
|
|
|
// Feed the cache size setting into the JDK
|
|
char buffer[1024];
|
|
jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
|
|
if (!add_property(buffer)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
|
|
FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
|
|
}
|
|
#endif
|
|
|
|
if (AggressiveOpts) {
|
|
// Sample flag setting code
|
|
// if (FLAG_IS_DEFAULT(EliminateZeroing)) {
|
|
// FLAG_SET_DEFAULT(EliminateZeroing, true);
|
|
// }
|
|
}
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
//===========================================================================================================
|
|
// Parsing of java.compiler property
|
|
|
|
void Arguments::process_java_compiler_argument(const char* arg) {
|
|
// For backwards compatibility, Djava.compiler=NONE or ""
|
|
// causes us to switch to -Xint mode UNLESS -Xdebug
|
|
// is also specified.
|
|
if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
|
|
set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
|
|
}
|
|
}
|
|
|
|
void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
|
|
_sun_java_launcher = os::strdup_check_oom(launcher);
|
|
}
|
|
|
|
bool Arguments::created_by_java_launcher() {
|
|
assert(_sun_java_launcher != NULL, "property must have value");
|
|
return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
|
|
}
|
|
|
|
bool Arguments::sun_java_launcher_is_altjvm() {
|
|
return _sun_java_launcher_is_altjvm;
|
|
}
|
|
|
|
//===========================================================================================================
|
|
// Parsing of main arguments
|
|
|
|
#if INCLUDE_JVMCI
|
|
// Check consistency of jvmci vm argument settings.
|
|
bool Arguments::check_jvmci_args_consistency() {
|
|
return JVMCIGlobals::check_jvmci_flags_are_consistent();
|
|
}
|
|
#endif //INCLUDE_JVMCI
|
|
|
|
// Check consistency of GC selection
|
|
bool Arguments::check_gc_consistency() {
|
|
// Ensure that the user has not selected conflicting sets
|
|
// of collectors.
|
|
uint i = 0;
|
|
if (UseSerialGC) i++;
|
|
if (UseConcMarkSweepGC) i++;
|
|
if (UseParallelGC || UseParallelOldGC) i++;
|
|
if (UseG1GC) i++;
|
|
if (i > 1) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Conflicting collector combinations in option list; "
|
|
"please refer to the release notes for the combinations "
|
|
"allowed\n");
|
|
return false;
|
|
}
|
|
|
|
if (UseConcMarkSweepGC && !UseParNewGC) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"It is not possible to combine the DefNew young collector with the CMS collector.\n");
|
|
return false;
|
|
}
|
|
|
|
if (UseParNewGC && !UseConcMarkSweepGC) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Check the consistency of vm_init_args
|
|
bool Arguments::check_vm_args_consistency() {
|
|
// Method for adding checks for flag consistency.
|
|
// The intent is to warn the user of all possible conflicts,
|
|
// before returning an error.
|
|
// Note: Needs platform-dependent factoring.
|
|
bool status = true;
|
|
|
|
if (TLABRefillWasteFraction == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"TLABRefillWasteFraction should be a denominator, "
|
|
"not " SIZE_FORMAT "\n",
|
|
TLABRefillWasteFraction);
|
|
status = false;
|
|
}
|
|
|
|
if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
|
|
MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
|
|
}
|
|
|
|
if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
|
|
FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
|
|
}
|
|
|
|
if (GCTimeLimit == 100) {
|
|
// Turn off gc-overhead-limit-exceeded checks
|
|
FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
|
|
}
|
|
|
|
status = status && check_gc_consistency();
|
|
|
|
// CMS space iteration, which FLSVerifyAllHeapreferences entails,
|
|
// insists that we hold the requisite locks so that the iteration is
|
|
// MT-safe. For the verification at start-up and shut-down, we don't
|
|
// yet have a good way of acquiring and releasing these locks,
|
|
// which are not visible at the CollectedHeap level. We want to
|
|
// be able to acquire these locks and then do the iteration rather
|
|
// than just disable the lock verification. This will be fixed under
|
|
// bug 4788986.
|
|
if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
|
|
if (VerifyDuringStartup) {
|
|
warning("Heap verification at start-up disabled "
|
|
"(due to current incompatibility with FLSVerifyAllHeapReferences)");
|
|
VerifyDuringStartup = false; // Disable verification at start-up
|
|
}
|
|
|
|
if (VerifyBeforeExit) {
|
|
warning("Heap verification at shutdown disabled "
|
|
"(due to current incompatibility with FLSVerifyAllHeapReferences)");
|
|
VerifyBeforeExit = false; // Disable verification at shutdown
|
|
}
|
|
}
|
|
|
|
if (PrintNMTStatistics) {
|
|
#if INCLUDE_NMT
|
|
if (MemTracker::tracking_level() == NMT_off) {
|
|
#endif // INCLUDE_NMT
|
|
warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
|
|
PrintNMTStatistics = false;
|
|
#if INCLUDE_NMT
|
|
}
|
|
#endif
|
|
}
|
|
#if INCLUDE_JVMCI
|
|
|
|
status = status && check_jvmci_args_consistency();
|
|
|
|
if (EnableJVMCI) {
|
|
if (!ScavengeRootsInCode) {
|
|
warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
|
|
ScavengeRootsInCode = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Check lower bounds of the code cache
|
|
// Template Interpreter code is approximately 3X larger in debug builds.
|
|
uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
|
|
if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
|
|
os::vm_page_size()/K);
|
|
status = false;
|
|
} else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
|
|
ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
|
|
status = false;
|
|
} else if (ReservedCodeCacheSize < min_code_cache_size) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
|
|
min_code_cache_size/K);
|
|
status = false;
|
|
} else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
|
|
// Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
|
|
CODE_CACHE_SIZE_LIMIT/M);
|
|
status = false;
|
|
} else if (NonNMethodCodeHeapSize < min_code_cache_size) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
|
|
min_code_cache_size/K);
|
|
status = false;
|
|
}
|
|
|
|
#ifdef _LP64
|
|
if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
|
|
warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
|
|
}
|
|
#endif
|
|
|
|
#ifndef SUPPORT_RESERVED_STACK_AREA
|
|
if (StackReservedPages != 0) {
|
|
FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
|
|
warning("Reserved Stack Area not supported on this platform");
|
|
}
|
|
#endif
|
|
|
|
if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
|
|
if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
|
|
warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
|
|
}
|
|
FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
|
|
}
|
|
if (UseCompiler && is_interpreter_only()) {
|
|
if (!FLAG_IS_DEFAULT(UseCompiler)) {
|
|
warning("UseCompiler disabled due to -Xint.");
|
|
}
|
|
FLAG_SET_CMDLINE(bool, UseCompiler, false);
|
|
}
|
|
#ifdef COMPILER2
|
|
if (PostLoopMultiversioning && !RangeCheckElimination) {
|
|
if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
|
|
warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
|
|
}
|
|
FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
|
|
}
|
|
#endif
|
|
return status;
|
|
}
|
|
|
|
bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
|
|
const char* option_type) {
|
|
if (ignore) return false;
|
|
|
|
const char* spacer = " ";
|
|
if (option_type == NULL) {
|
|
option_type = ++spacer; // Set both to the empty string.
|
|
}
|
|
|
|
if (os::obsolete_option(option)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Obsolete %s%soption: %s\n", option_type, spacer,
|
|
option->optionString);
|
|
return false;
|
|
} else {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unrecognized %s%soption: %s\n", option_type, spacer,
|
|
option->optionString);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static const char* user_assertion_options[] = {
|
|
"-da", "-ea", "-disableassertions", "-enableassertions", 0
|
|
};
|
|
|
|
static const char* system_assertion_options[] = {
|
|
"-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
|
|
};
|
|
|
|
bool Arguments::parse_uintx(const char* value,
|
|
uintx* uintx_arg,
|
|
uintx min_size) {
|
|
|
|
// Check the sign first since atojulong() parses only unsigned values.
|
|
bool value_is_positive = !(*value == '-');
|
|
|
|
if (value_is_positive) {
|
|
julong n;
|
|
bool good_return = atojulong(value, &n);
|
|
if (good_return) {
|
|
bool above_minimum = n >= min_size;
|
|
bool value_is_too_large = n > max_uintx;
|
|
|
|
if (above_minimum && !value_is_too_large) {
|
|
*uintx_arg = n;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
unsigned int addreads_count = 0;
|
|
unsigned int addexports_count = 0;
|
|
unsigned int addopens_count = 0;
|
|
unsigned int addmods_count = 0;
|
|
unsigned int patch_mod_count = 0;
|
|
|
|
bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
|
|
size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
|
|
char* property = AllocateHeap(prop_len, mtArguments);
|
|
int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
|
|
if (ret < 0 || ret >= (int)prop_len) {
|
|
FreeHeap(property);
|
|
return false;
|
|
}
|
|
bool added = add_property(property, UnwriteableProperty, internal);
|
|
FreeHeap(property);
|
|
return added;
|
|
}
|
|
|
|
bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
|
|
// Make sure count is < 1,000. Otherwise, memory allocation will be too small.
|
|
if (count < 1000) {
|
|
size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + 5;
|
|
char* property = AllocateHeap(prop_len, mtArguments);
|
|
int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
|
|
if (ret < 0 || ret >= (int)prop_len) {
|
|
FreeHeap(property);
|
|
return false;
|
|
}
|
|
bool added = add_property(property, UnwriteableProperty, InternalProperty);
|
|
FreeHeap(property);
|
|
return added;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
|
|
julong* long_arg,
|
|
julong min_size) {
|
|
if (!atojulong(s, long_arg)) return arg_unreadable;
|
|
return check_memory_size(*long_arg, min_size);
|
|
}
|
|
|
|
// Parse JavaVMInitArgs structure
|
|
|
|
jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
|
|
const JavaVMInitArgs *java_options_args,
|
|
const JavaVMInitArgs *cmd_line_args) {
|
|
bool patch_mod_javabase = false;
|
|
|
|
// Save default settings for some mode flags
|
|
Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
|
|
Arguments::_UseOnStackReplacement = UseOnStackReplacement;
|
|
Arguments::_ClipInlining = ClipInlining;
|
|
Arguments::_BackgroundCompilation = BackgroundCompilation;
|
|
if (TieredCompilation) {
|
|
Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
|
|
Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
|
|
}
|
|
|
|
// Setup flags for mixed which is the default
|
|
set_mode_flags(_mixed);
|
|
|
|
// Parse args structure generated from JAVA_TOOL_OPTIONS environment
|
|
// variable (if present).
|
|
jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
// Parse args structure generated from the command line flags.
|
|
result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE);
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
// Parse args structure generated from the _JAVA_OPTIONS environment
|
|
// variable (if present) (mimics classic VM)
|
|
result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
// Do final processing now that all arguments have been parsed
|
|
result = finalize_vm_init_args();
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
#if INCLUDE_CDS
|
|
if (UseSharedSpaces && patch_mod_javabase) {
|
|
no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
|
|
}
|
|
#endif
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
// Checks if name in command-line argument -agent{lib,path}:name[=options]
|
|
// represents a valid JDWP agent. is_path==true denotes that we
|
|
// are dealing with -agentpath (case where name is a path), otherwise with
|
|
// -agentlib
|
|
bool valid_jdwp_agent(char *name, bool is_path) {
|
|
char *_name;
|
|
const char *_jdwp = "jdwp";
|
|
size_t _len_jdwp, _len_prefix;
|
|
|
|
if (is_path) {
|
|
if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
|
|
return false;
|
|
}
|
|
|
|
_name++; // skip past last path separator
|
|
_len_prefix = strlen(JNI_LIB_PREFIX);
|
|
|
|
if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
|
|
return false;
|
|
}
|
|
|
|
_name += _len_prefix;
|
|
_len_jdwp = strlen(_jdwp);
|
|
|
|
if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
|
|
_name += _len_jdwp;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
|
|
if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (strcmp(name, _jdwp) == 0) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
|
|
// --patch-module=<module>=<file>(<pathsep><file>)*
|
|
assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
|
|
// Find the equal sign between the module name and the path specification
|
|
const char* module_equal = strchr(patch_mod_tail, '=');
|
|
if (module_equal == NULL) {
|
|
jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
|
|
return JNI_ERR;
|
|
} else {
|
|
// Pick out the module name
|
|
size_t module_len = module_equal - patch_mod_tail;
|
|
char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
|
|
if (module_name != NULL) {
|
|
memcpy(module_name, patch_mod_tail, module_len);
|
|
*(module_name + module_len) = '\0';
|
|
// The path piece begins one past the module_equal sign
|
|
add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
|
|
FREE_C_HEAP_ARRAY(char, module_name);
|
|
if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) {
|
|
// For match_option to return remaining or value part of option string
|
|
const char* tail;
|
|
|
|
// iterate over arguments
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
bool is_absolute_path = false; // for -agentpath vs -agentlib
|
|
|
|
const JavaVMOption* option = args->options + index;
|
|
|
|
if (!match_option(option, "-Djava.class.path", &tail) &&
|
|
!match_option(option, "-Dsun.java.command", &tail) &&
|
|
!match_option(option, "-Dsun.java.launcher", &tail)) {
|
|
|
|
// add all jvm options to the jvm_args string. This string
|
|
// is used later to set the java.vm.args PerfData string constant.
|
|
// the -Djava.class.path and the -Dsun.java.command options are
|
|
// omitted from jvm_args string as each have their own PerfData
|
|
// string constant object.
|
|
build_jvm_args(option->optionString);
|
|
}
|
|
|
|
// -verbose:[class/gc/jni]
|
|
if (match_option(option, "-verbose", &tail)) {
|
|
if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
|
|
} else if (!strcmp(tail, ":gc")) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
|
|
} else if (!strcmp(tail, ":jni")) {
|
|
if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// -da / -ea / -disableassertions / -enableassertions
|
|
// These accept an optional class/package name separated by a colon, e.g.,
|
|
// -da:java.lang.Thread.
|
|
} else if (match_option(option, user_assertion_options, &tail, true)) {
|
|
bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
|
|
if (*tail == '\0') {
|
|
JavaAssertions::setUserClassDefault(enable);
|
|
} else {
|
|
assert(*tail == ':', "bogus match by match_option()");
|
|
JavaAssertions::addOption(tail + 1, enable);
|
|
}
|
|
// -dsa / -esa / -disablesystemassertions / -enablesystemassertions
|
|
} else if (match_option(option, system_assertion_options, &tail, false)) {
|
|
bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
|
|
JavaAssertions::setSystemClassDefault(enable);
|
|
// -bootclasspath:
|
|
} else if (match_option(option, "-Xbootclasspath:", &tail)) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Xbootclasspath is no longer a supported option.\n");
|
|
return JNI_EINVAL;
|
|
// -bootclasspath/a:
|
|
} else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
|
|
Arguments::append_sysclasspath(tail);
|
|
// -bootclasspath/p:
|
|
} else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Xbootclasspath/p is no longer a supported option.\n");
|
|
return JNI_EINVAL;
|
|
// -Xrun
|
|
} else if (match_option(option, "-Xrun", &tail)) {
|
|
if (tail != NULL) {
|
|
const char* pos = strchr(tail, ':');
|
|
size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
|
|
char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
|
|
jio_snprintf(name, len + 1, "%s", tail);
|
|
|
|
char *options = NULL;
|
|
if(pos != NULL) {
|
|
size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
|
|
options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
|
|
}
|
|
#if !INCLUDE_JVMTI
|
|
if (strcmp(name, "jdwp") == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Debugging agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
add_init_library(name, options);
|
|
}
|
|
} else if (match_option(option, "--add-reads=", &tail)) {
|
|
if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-exports=", &tail)) {
|
|
if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-opens=", &tail)) {
|
|
if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-modules=", &tail)) {
|
|
if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--limit-modules=", &tail)) {
|
|
if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--module-path=", &tail)) {
|
|
if (!create_property("jdk.module.path", tail, ExternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--upgrade-module-path=", &tail)) {
|
|
if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--patch-module=", &tail)) {
|
|
// --patch-module=<module>=<file>(<pathsep><file>)*
|
|
int res = process_patch_mod_option(tail, patch_mod_javabase);
|
|
if (res != JNI_OK) {
|
|
return res;
|
|
}
|
|
// -agentlib and -agentpath
|
|
} else if (match_option(option, "-agentlib:", &tail) ||
|
|
(is_absolute_path = match_option(option, "-agentpath:", &tail))) {
|
|
if(tail != NULL) {
|
|
const char* pos = strchr(tail, '=');
|
|
size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
|
|
char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
|
|
name[len] = '\0';
|
|
|
|
char *options = NULL;
|
|
if(pos != NULL) {
|
|
options = os::strdup_check_oom(pos + 1, mtArguments);
|
|
}
|
|
#if !INCLUDE_JVMTI
|
|
if (valid_jdwp_agent(name, is_absolute_path)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Debugging agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
add_init_agent(name, options, is_absolute_path);
|
|
}
|
|
// -javaagent
|
|
} else if (match_option(option, "-javaagent:", &tail)) {
|
|
#if !INCLUDE_JVMTI
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Instrumentation agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
#else
|
|
if (tail != NULL) {
|
|
size_t length = strlen(tail) + 1;
|
|
char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
|
|
jio_snprintf(options, length, "%s", tail);
|
|
add_init_agent("instrument", options, false);
|
|
// java agents need module java.instrument
|
|
if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
// -Xnoclassgc
|
|
} else if (match_option(option, "-Xnoclassgc")) {
|
|
if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xconcgc
|
|
} else if (match_option(option, "-Xconcgc")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
|
|
// -Xnoconcgc
|
|
} else if (match_option(option, "-Xnoconcgc")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
|
|
// -Xbatch
|
|
} else if (match_option(option, "-Xbatch")) {
|
|
if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xmn for compatibility with other JVM vendors
|
|
} else if (match_option(option, "-Xmn", &tail)) {
|
|
julong long_initial_young_size = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid initial young generation size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xms
|
|
} else if (match_option(option, "-Xms", &tail)) {
|
|
julong long_initial_heap_size = 0;
|
|
// an initial heap size of 0 means automatically determine
|
|
ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid initial heap size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
set_min_heap_size((size_t)long_initial_heap_size);
|
|
// Currently the minimum size and the initial heap sizes are the same.
|
|
// Can be overridden with -XX:InitialHeapSize.
|
|
if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xmx
|
|
} else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
|
|
julong long_max_heap_size = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum heap size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// Xmaxf
|
|
} else if (match_option(option, "-Xmaxf", &tail)) {
|
|
char* err;
|
|
int maxf = (int)(strtod(tail, &err) * 100);
|
|
if (*err != '\0' || *tail == '\0') {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Bad max heap free percentage size: %s\n",
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// Xminf
|
|
} else if (match_option(option, "-Xminf", &tail)) {
|
|
char* err;
|
|
int minf = (int)(strtod(tail, &err) * 100);
|
|
if (*err != '\0' || *tail == '\0') {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Bad min heap free percentage size: %s\n",
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// -Xss
|
|
} else if (match_option(option, "-Xss", &tail)) {
|
|
julong long_ThreadStackSize = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid thread stack size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
// Internally track ThreadStackSize in units of 1024 bytes.
|
|
if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
|
|
round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads, -Xusealtsigs
|
|
} else if (match_option(option, "-Xoss", &tail) ||
|
|
match_option(option, "-Xsqnopause") ||
|
|
match_option(option, "-Xoptimize") ||
|
|
match_option(option, "-Xboundthreads") ||
|
|
match_option(option, "-Xusealtsigs")) {
|
|
// All these options are deprecated in JDK 9 and will be removed in a future release
|
|
char version[256];
|
|
JDK_Version::jdk(9).to_string(version, sizeof(version));
|
|
warning("Ignoring option %s; support was removed in %s", option->optionString, version);
|
|
} else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
|
|
julong long_CodeCacheExpansionSize = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid argument: %s. Must be at least %luK.\n", option->optionString,
|
|
os::vm_page_size()/K);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
|
|
match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
|
|
julong long_ReservedCodeCacheSize = 0;
|
|
|
|
ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum code cache size: %s.\n", option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -XX:NonNMethodCodeHeapSize=
|
|
} else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
|
|
julong long_NonNMethodCodeHeapSize = 0;
|
|
|
|
ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -XX:ProfiledCodeHeapSize=
|
|
} else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
|
|
julong long_ProfiledCodeHeapSize = 0;
|
|
|
|
ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum profiled code heap size: %s.\n", option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -XX:NonProfiledCodeHeapSizee=
|
|
} else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
|
|
julong long_NonProfiledCodeHeapSize = 0;
|
|
|
|
ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -green
|
|
} else if (match_option(option, "-green")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Green threads support not available\n");
|
|
return JNI_EINVAL;
|
|
// -native
|
|
} else if (match_option(option, "-native")) {
|
|
// HotSpot always uses native threads, ignore silently for compatibility
|
|
// -Xrs
|
|
} else if (match_option(option, "-Xrs")) {
|
|
// Classic/EVM option, new functionality
|
|
if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xprof
|
|
} else if (match_option(option, "-Xprof")) {
|
|
#if INCLUDE_FPROF
|
|
_has_profile = true;
|
|
#else // INCLUDE_FPROF
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Flat profiling is not supported in this VM.\n");
|
|
return JNI_ERR;
|
|
#endif // INCLUDE_FPROF
|
|
// -Xconcurrentio
|
|
} else if (match_option(option, "-Xconcurrentio")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// -Xinternalversion
|
|
} else if (match_option(option, "-Xinternalversion")) {
|
|
jio_fprintf(defaultStream::output_stream(), "%s\n",
|
|
VM_Version::internal_vm_info_string());
|
|
vm_exit(0);
|
|
#ifndef PRODUCT
|
|
// -Xprintflags
|
|
} else if (match_option(option, "-Xprintflags")) {
|
|
CommandLineFlags::printFlags(tty, false);
|
|
vm_exit(0);
|
|
#endif
|
|
// -D
|
|
} else if (match_option(option, "-D", &tail)) {
|
|
const char* value;
|
|
if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
|
|
*value!= '\0' && strcmp(value, "\"\"") != 0) {
|
|
// abort if -Djava.endorsed.dirs is set
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
|
|
"in modular form will be supported via the concept of upgradeable modules.\n", value);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (match_option(option, "-Djava.ext.dirs=", &value) &&
|
|
*value != '\0' && strcmp(value, "\"\"") != 0) {
|
|
// abort if -Djava.ext.dirs is set
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
|
|
return JNI_EINVAL;
|
|
}
|
|
// Check for module related properties. They must be set using the modules
|
|
// options. For example: use "--add-modules=java.sql", not
|
|
// "-Djdk.module.addmods=java.sql"
|
|
if (is_internal_module_property(option->optionString + 2)) {
|
|
needs_module_property_warning = true;
|
|
continue;
|
|
}
|
|
|
|
if (!add_property(tail)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
// Out of the box management support
|
|
if (match_option(option, "-Dcom.sun.management", &tail)) {
|
|
#if INCLUDE_MANAGEMENT
|
|
if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// management agent in module java.management
|
|
if (!create_numbered_property("jdk.module.addmods", "java.management", addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
#else
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Dcom.sun.management is not supported in this VM.\n");
|
|
return JNI_ERR;
|
|
#endif
|
|
}
|
|
// -Xint
|
|
} else if (match_option(option, "-Xint")) {
|
|
set_mode_flags(_int);
|
|
// -Xmixed
|
|
} else if (match_option(option, "-Xmixed")) {
|
|
set_mode_flags(_mixed);
|
|
// -Xcomp
|
|
} else if (match_option(option, "-Xcomp")) {
|
|
// for testing the compiler; turn off all flags that inhibit compilation
|
|
set_mode_flags(_comp);
|
|
// -Xshare:dump
|
|
} else if (match_option(option, "-Xshare:dump")) {
|
|
if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
set_mode_flags(_int); // Prevent compilation, which creates objects
|
|
// -Xshare:on
|
|
} else if (match_option(option, "-Xshare:on")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xshare:auto
|
|
} else if (match_option(option, "-Xshare:auto")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xshare:off
|
|
} else if (match_option(option, "-Xshare:off")) {
|
|
if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xverify
|
|
} else if (match_option(option, "-Xverify", &tail)) {
|
|
if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (strcmp(tail, ":remote") == 0) {
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (strcmp(tail, ":none") == 0) {
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xdebug
|
|
} else if (match_option(option, "-Xdebug")) {
|
|
// note this flag has been used, then ignore
|
|
set_xdebug_mode(true);
|
|
// -Xnoagent
|
|
} else if (match_option(option, "-Xnoagent")) {
|
|
// For compatibility with classic. HotSpot refuses to load the old style agent.dll.
|
|
} else if (match_option(option, "-Xloggc:", &tail)) {
|
|
// Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
|
|
log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
|
|
_gc_log_filename = os::strdup_check_oom(tail);
|
|
} else if (match_option(option, "-Xlog", &tail)) {
|
|
bool ret = false;
|
|
if (strcmp(tail, ":help") == 0) {
|
|
LogConfiguration::print_command_line_help(defaultStream::output_stream());
|
|
vm_exit(0);
|
|
} else if (strcmp(tail, ":disable") == 0) {
|
|
LogConfiguration::disable_logging();
|
|
ret = true;
|
|
} else if (*tail == '\0') {
|
|
ret = LogConfiguration::parse_command_line_arguments();
|
|
assert(ret, "-Xlog without arguments should never fail to parse");
|
|
} else if (*tail == ':') {
|
|
ret = LogConfiguration::parse_command_line_arguments(tail + 1);
|
|
}
|
|
if (ret == false) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid -Xlog option '-Xlog%s'\n",
|
|
tail);
|
|
return JNI_EINVAL;
|
|
}
|
|
// JNI hooks
|
|
} else if (match_option(option, "-Xcheck", &tail)) {
|
|
if (!strcmp(tail, ":jni")) {
|
|
#if !INCLUDE_JNI_CHECK
|
|
warning("JNI CHECKING is not supported in this VM");
|
|
#else
|
|
CheckJNICalls = true;
|
|
#endif // INCLUDE_JNI_CHECK
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized,
|
|
"check")) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "vfprintf")) {
|
|
_vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
|
|
} else if (match_option(option, "exit")) {
|
|
_exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
|
|
} else if (match_option(option, "abort")) {
|
|
_abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
|
|
// -XX:+AggressiveHeap
|
|
} else if (match_option(option, "-XX:+AggressiveHeap")) {
|
|
jint result = set_aggressive_heap_flags();
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
// Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
|
|
// and the last option wins.
|
|
} else if (match_option(option, "-XX:+NeverTenure")) {
|
|
if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+AlwaysTenure")) {
|
|
if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
|
|
uintx max_tenuring_thresh = 0;
|
|
if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
if (MaxTenuringThreshold == 0) {
|
|
if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
} else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
|
|
if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
|
|
if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
|
|
#if defined(DTRACE_ENABLED)
|
|
if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#else // defined(DTRACE_ENABLED)
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"ExtendedDTraceProbes flag is not applicable for this configuration\n");
|
|
return JNI_EINVAL;
|
|
#endif // defined(DTRACE_ENABLED)
|
|
#ifdef ASSERT
|
|
} else if (match_option(option, "-XX:+FullGCALot")) {
|
|
if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// disable scavenge before parallel mark-compact
|
|
if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#endif
|
|
#if !INCLUDE_MANAGEMENT
|
|
} else if (match_option(option, "-XX:+ManagementServer")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"ManagementServer is not supported in this VM.\n");
|
|
return JNI_ERR;
|
|
#endif // INCLUDE_MANAGEMENT
|
|
} else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
|
|
// Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
|
|
// already been handled
|
|
if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
|
|
(strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
|
|
if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// Unknown option
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized)) {
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
|
|
// PrintSharedArchiveAndExit will turn on
|
|
// -Xshare:on
|
|
// -Xlog:class+path=info
|
|
if (PrintSharedArchiveAndExit) {
|
|
if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
|
|
}
|
|
|
|
// Change the default value for flags which have different default values
|
|
// when working with older JDKs.
|
|
#ifdef LINUX
|
|
if (JDK_Version::current().compare_major(6) <= 0 &&
|
|
FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
|
|
FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
|
|
}
|
|
#endif // LINUX
|
|
fix_appclasspath();
|
|
return JNI_OK;
|
|
}
|
|
|
|
void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
|
|
// For java.base check for duplicate --patch-module options being specified on the command line.
|
|
// This check is only required for java.base, all other duplicate module specifications
|
|
// will be checked during module system initialization. The module system initialization
|
|
// will throw an ExceptionInInitializerError if this situation occurs.
|
|
if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
|
|
if (*patch_mod_javabase) {
|
|
vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
|
|
} else {
|
|
*patch_mod_javabase = true;
|
|
}
|
|
}
|
|
|
|
// Create GrowableArray lazily, only if --patch-module has been specified
|
|
if (_patch_mod_prefix == NULL) {
|
|
_patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
|
|
}
|
|
|
|
_patch_mod_prefix->push(new ModulePatchPath(module_name, path));
|
|
}
|
|
|
|
// Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
|
|
//
|
|
// This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
|
|
// in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
|
|
// Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
|
|
// path is treated as the current directory.
|
|
//
|
|
// This causes problems with CDS, which requires that all directories specified in the classpath
|
|
// must be empty. In most cases, applications do NOT want to load classes from the current
|
|
// directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
|
|
// scripts compatible with CDS.
|
|
void Arguments::fix_appclasspath() {
|
|
if (IgnoreEmptyClassPaths) {
|
|
const char separator = *os::path_separator();
|
|
const char* src = _java_class_path->value();
|
|
|
|
// skip over all the leading empty paths
|
|
while (*src == separator) {
|
|
src ++;
|
|
}
|
|
|
|
char* copy = os::strdup_check_oom(src, mtArguments);
|
|
|
|
// trim all trailing empty paths
|
|
for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
|
|
*tail = '\0';
|
|
}
|
|
|
|
char from[3] = {separator, separator, '\0'};
|
|
char to [2] = {separator, '\0'};
|
|
while (StringUtils::replace_no_expand(copy, from, to) > 0) {
|
|
// Keep replacing "::" -> ":" until we have no more "::" (non-windows)
|
|
// Keep replacing ";;" -> ";" until we have no more ";;" (windows)
|
|
}
|
|
|
|
_java_class_path->set_writeable_value(copy);
|
|
FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
|
|
}
|
|
}
|
|
|
|
static bool has_jar_files(const char* directory) {
|
|
DIR* dir = os::opendir(directory);
|
|
if (dir == NULL) return false;
|
|
|
|
struct dirent *entry;
|
|
char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments);
|
|
bool hasJarFile = false;
|
|
while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
|
|
const char* name = entry->d_name;
|
|
const char* ext = name + strlen(name) - 4;
|
|
hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
|
|
}
|
|
FREE_C_HEAP_ARRAY(char, dbuf);
|
|
os::closedir(dir);
|
|
return hasJarFile ;
|
|
}
|
|
|
|
static int check_non_empty_dirs(const char* path) {
|
|
const char separator = *os::path_separator();
|
|
const char* const end = path + strlen(path);
|
|
int nonEmptyDirs = 0;
|
|
while (path < end) {
|
|
const char* tmp_end = strchr(path, separator);
|
|
if (tmp_end == NULL) {
|
|
if (has_jar_files(path)) {
|
|
nonEmptyDirs++;
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"Non-empty directory: %s\n", path);
|
|
}
|
|
path = end;
|
|
} else {
|
|
char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments);
|
|
memcpy(dirpath, path, tmp_end - path);
|
|
dirpath[tmp_end - path] = '\0';
|
|
if (has_jar_files(dirpath)) {
|
|
nonEmptyDirs++;
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"Non-empty directory: %s\n", dirpath);
|
|
}
|
|
FREE_C_HEAP_ARRAY(char, dirpath);
|
|
path = tmp_end + 1;
|
|
}
|
|
}
|
|
return nonEmptyDirs;
|
|
}
|
|
|
|
jint Arguments::finalize_vm_init_args() {
|
|
// check if the default lib/endorsed directory exists; if so, error
|
|
char path[JVM_MAXPATHLEN];
|
|
const char* fileSep = os::file_separator();
|
|
jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
|
|
|
|
if (CheckEndorsedAndExtDirs) {
|
|
int nonEmptyDirs = 0;
|
|
// check endorsed directory
|
|
nonEmptyDirs += check_non_empty_dirs(path);
|
|
// check the extension directories
|
|
nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
|
|
if (nonEmptyDirs > 0) {
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
|
|
DIR* dir = os::opendir(path);
|
|
if (dir != NULL) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
|
|
"in modular form will be supported via the concept of upgradeable modules.\n");
|
|
os::closedir(dir);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
|
|
dir = os::opendir(path);
|
|
if (dir != NULL) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
|
|
"Use -classpath instead.\n.");
|
|
os::closedir(dir);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
// This must be done after all arguments have been processed.
|
|
// java_compiler() true means set to "NONE" or empty.
|
|
if (java_compiler() && !xdebug_mode()) {
|
|
// For backwards compatibility, we switch to interpreted mode if
|
|
// -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
|
|
// not specified.
|
|
set_mode_flags(_int);
|
|
}
|
|
|
|
// CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
|
|
// but like -Xint, leave compilation thresholds unaffected.
|
|
// With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
|
|
if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
|
|
set_mode_flags(_int);
|
|
}
|
|
|
|
// eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
|
|
if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
|
|
FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
|
|
}
|
|
|
|
#if !defined(COMPILER2) && !INCLUDE_JVMCI
|
|
// Don't degrade server performance for footprint
|
|
if (FLAG_IS_DEFAULT(UseLargePages) &&
|
|
MaxHeapSize < LargePageHeapSizeThreshold) {
|
|
// No need for large granularity pages w/small heaps.
|
|
// Note that large pages are enabled/disabled for both the
|
|
// Java heap and the code cache.
|
|
FLAG_SET_DEFAULT(UseLargePages, false);
|
|
}
|
|
|
|
#elif defined(COMPILER2)
|
|
if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
|
|
FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
|
|
}
|
|
#endif
|
|
|
|
#if !defined(COMPILER2) && !INCLUDE_JVMCI
|
|
UNSUPPORTED_OPTION(ProfileInterpreter);
|
|
NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
|
|
#endif
|
|
|
|
#ifndef TIERED
|
|
// Tiered compilation is undefined.
|
|
UNSUPPORTED_OPTION(TieredCompilation);
|
|
#endif
|
|
|
|
#if INCLUDE_JVMCI
|
|
if (EnableJVMCI &&
|
|
!create_numbered_property("jdk.module.addmods", "jdk.vm.ci", addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
// If we are running in a headless jre, force java.awt.headless property
|
|
// to be true unless the property has already been set.
|
|
// Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
|
|
if (os::is_headless_jre()) {
|
|
const char* headless = Arguments::get_property("java.awt.headless");
|
|
if (headless == NULL) {
|
|
const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
|
|
if (headless_env == NULL) {
|
|
if (!add_property("java.awt.headless=true")) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else {
|
|
char buffer[256];
|
|
jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
|
|
if (!add_property(buffer)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
|
|
// CMS can only be used with ParNew
|
|
FLAG_SET_ERGO(bool, UseParNewGC, true);
|
|
}
|
|
|
|
if (!check_vm_args_consistency()) {
|
|
return JNI_ERR;
|
|
}
|
|
|
|
#if INCLUDE_JVMCI
|
|
if (UseJVMCICompiler) {
|
|
Compilation_mode = CompMode_server;
|
|
}
|
|
#endif
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
// Helper class for controlling the lifetime of JavaVMInitArgs
|
|
// objects. The contents of the JavaVMInitArgs are guaranteed to be
|
|
// deleted on the destruction of the ScopedVMInitArgs object.
|
|
class ScopedVMInitArgs : public StackObj {
|
|
private:
|
|
JavaVMInitArgs _args;
|
|
char* _container_name;
|
|
bool _is_set;
|
|
char* _vm_options_file_arg;
|
|
|
|
public:
|
|
ScopedVMInitArgs(const char *container_name) {
|
|
_args.version = JNI_VERSION_1_2;
|
|
_args.nOptions = 0;
|
|
_args.options = NULL;
|
|
_args.ignoreUnrecognized = false;
|
|
_container_name = (char *)container_name;
|
|
_is_set = false;
|
|
_vm_options_file_arg = NULL;
|
|
}
|
|
|
|
// Populates the JavaVMInitArgs object represented by this
|
|
// ScopedVMInitArgs object with the arguments in options. The
|
|
// allocated memory is deleted by the destructor. If this method
|
|
// returns anything other than JNI_OK, then this object is in a
|
|
// partially constructed state, and should be abandoned.
|
|
jint set_args(GrowableArray<JavaVMOption>* options) {
|
|
_is_set = true;
|
|
JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
|
|
JavaVMOption, options->length(), mtArguments);
|
|
if (options_arr == NULL) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
_args.options = options_arr;
|
|
|
|
for (int i = 0; i < options->length(); i++) {
|
|
options_arr[i] = options->at(i);
|
|
options_arr[i].optionString = os::strdup(options_arr[i].optionString);
|
|
if (options_arr[i].optionString == NULL) {
|
|
// Rely on the destructor to do cleanup.
|
|
_args.nOptions = i;
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
|
|
_args.nOptions = options->length();
|
|
_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
|
|
return JNI_OK;
|
|
}
|
|
|
|
JavaVMInitArgs* get() { return &_args; }
|
|
char* container_name() { return _container_name; }
|
|
bool is_set() { return _is_set; }
|
|
bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
|
|
char* vm_options_file_arg() { return _vm_options_file_arg; }
|
|
|
|
void set_vm_options_file_arg(const char *vm_options_file_arg) {
|
|
if (_vm_options_file_arg != NULL) {
|
|
os::free(_vm_options_file_arg);
|
|
}
|
|
_vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
|
|
}
|
|
|
|
~ScopedVMInitArgs() {
|
|
if (_vm_options_file_arg != NULL) {
|
|
os::free(_vm_options_file_arg);
|
|
}
|
|
if (_args.options == NULL) return;
|
|
for (int i = 0; i < _args.nOptions; i++) {
|
|
os::free(_args.options[i].optionString);
|
|
}
|
|
FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
|
|
}
|
|
|
|
// Insert options into this option list, to replace option at
|
|
// vm_options_file_pos (-XX:VMOptionsFile)
|
|
jint insert(const JavaVMInitArgs* args,
|
|
const JavaVMInitArgs* args_to_insert,
|
|
const int vm_options_file_pos) {
|
|
assert(_args.options == NULL, "shouldn't be set yet");
|
|
assert(args_to_insert->nOptions != 0, "there should be args to insert");
|
|
assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
|
|
|
|
int length = args->nOptions + args_to_insert->nOptions - 1;
|
|
GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
|
|
GrowableArray<JavaVMOption>(length, true); // Construct new option array
|
|
for (int i = 0; i < args->nOptions; i++) {
|
|
if (i == vm_options_file_pos) {
|
|
// insert the new options starting at the same place as the
|
|
// -XX:VMOptionsFile option
|
|
for (int j = 0; j < args_to_insert->nOptions; j++) {
|
|
options->push(args_to_insert->options[j]);
|
|
}
|
|
} else {
|
|
options->push(args->options[i]);
|
|
}
|
|
}
|
|
// make into options array
|
|
jint result = set_args(options);
|
|
delete options;
|
|
return result;
|
|
}
|
|
};
|
|
|
|
jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
|
|
return parse_options_environment_variable("_JAVA_OPTIONS", args);
|
|
}
|
|
|
|
jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
|
|
return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
|
|
}
|
|
|
|
jint Arguments::parse_options_environment_variable(const char* name,
|
|
ScopedVMInitArgs* vm_args) {
|
|
char *buffer = ::getenv(name);
|
|
|
|
// Don't check this environment variable if user has special privileges
|
|
// (e.g. unix su command).
|
|
if (buffer == NULL || os::have_special_privileges()) {
|
|
return JNI_OK;
|
|
}
|
|
|
|
if ((buffer = os::strdup(buffer)) == NULL) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Picked up %s: %s\n", name, buffer);
|
|
|
|
int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
|
|
|
|
os::free(buffer);
|
|
return retcode;
|
|
}
|
|
|
|
jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
|
|
// read file into buffer
|
|
int fd = ::open(file_name, O_RDONLY);
|
|
if (fd < 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not open options file '%s'\n",
|
|
file_name);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
struct stat stbuf;
|
|
int retcode = os::stat(file_name, &stbuf);
|
|
if (retcode != 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not stat options file '%s'\n",
|
|
file_name);
|
|
os::close(fd);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
if (stbuf.st_size == 0) {
|
|
// tell caller there is no option data and that is ok
|
|
os::close(fd);
|
|
return JNI_OK;
|
|
}
|
|
|
|
// '+ 1' for NULL termination even with max bytes
|
|
size_t bytes_alloc = stbuf.st_size + 1;
|
|
|
|
char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
|
|
if (NULL == buf) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not allocate read buffer for options file parse\n");
|
|
os::close(fd);
|
|
return JNI_ENOMEM;
|
|
}
|
|
|
|
memset(buf, 0, bytes_alloc);
|
|
|
|
// Fill buffer
|
|
// Use ::read() instead of os::read because os::read()
|
|
// might do a thread state transition
|
|
// and it is too early for that here
|
|
|
|
ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
|
|
os::close(fd);
|
|
if (bytes_read < 0) {
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not read options file '%s'\n", file_name);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
if (bytes_read == 0) {
|
|
// tell caller there is no option data and that is ok
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
return JNI_OK;
|
|
}
|
|
|
|
retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
|
|
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
return retcode;
|
|
}
|
|
|
|
jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
|
|
GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
|
|
|
|
// some pointers to help with parsing
|
|
char *buffer_end = buffer + buf_len;
|
|
char *opt_hd = buffer;
|
|
char *wrt = buffer;
|
|
char *rd = buffer;
|
|
|
|
// parse all options
|
|
while (rd < buffer_end) {
|
|
// skip leading white space from the input string
|
|
while (rd < buffer_end && isspace(*rd)) {
|
|
rd++;
|
|
}
|
|
|
|
if (rd >= buffer_end) {
|
|
break;
|
|
}
|
|
|
|
// Remember this is where we found the head of the token.
|
|
opt_hd = wrt;
|
|
|
|
// Tokens are strings of non white space characters separated
|
|
// by one or more white spaces.
|
|
while (rd < buffer_end && !isspace(*rd)) {
|
|
if (*rd == '\'' || *rd == '"') { // handle a quoted string
|
|
int quote = *rd; // matching quote to look for
|
|
rd++; // don't copy open quote
|
|
while (rd < buffer_end && *rd != quote) {
|
|
// include everything (even spaces)
|
|
// up until the close quote
|
|
*wrt++ = *rd++; // copy to option string
|
|
}
|
|
|
|
if (rd < buffer_end) {
|
|
rd++; // don't copy close quote
|
|
} else {
|
|
// did not see closing quote
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unmatched quote in %s\n", name);
|
|
delete options;
|
|
return JNI_ERR;
|
|
}
|
|
} else {
|
|
*wrt++ = *rd++; // copy to option string
|
|
}
|
|
}
|
|
|
|
// steal a white space character and set it to NULL
|
|
*wrt++ = '\0';
|
|
// We now have a complete token
|
|
|
|
JavaVMOption option;
|
|
option.optionString = opt_hd;
|
|
option.extraInfo = NULL;
|
|
|
|
options->append(option); // Fill in option
|
|
|
|
rd++; // Advance to next character
|
|
}
|
|
|
|
// Fill out JavaVMInitArgs structure.
|
|
jint status = vm_args->set_args(options);
|
|
|
|
delete options;
|
|
return status;
|
|
}
|
|
|
|
void Arguments::set_shared_spaces_flags() {
|
|
if (DumpSharedSpaces) {
|
|
if (FailOverToOldVerifier) {
|
|
// Don't fall back to the old verifier on verification failure. If a
|
|
// class fails verification with the split verifier, it might fail the
|
|
// CDS runtime verifier constraint check. In that case, we don't want
|
|
// to share the class. We only archive classes that pass the split verifier.
|
|
FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
|
|
}
|
|
|
|
if (RequireSharedSpaces) {
|
|
warning("Cannot dump shared archive while using shared archive");
|
|
}
|
|
UseSharedSpaces = false;
|
|
#ifdef _LP64
|
|
if (!UseCompressedOops || !UseCompressedClassPointers) {
|
|
vm_exit_during_initialization(
|
|
"Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
|
|
}
|
|
} else {
|
|
if (!UseCompressedOops || !UseCompressedClassPointers) {
|
|
no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// Sharing support
|
|
// Construct the path to the archive
|
|
static char* get_shared_archive_path() {
|
|
char *shared_archive_path;
|
|
if (SharedArchiveFile == NULL) {
|
|
char jvm_path[JVM_MAXPATHLEN];
|
|
os::jvm_path(jvm_path, sizeof(jvm_path));
|
|
char *end = strrchr(jvm_path, *os::file_separator());
|
|
if (end != NULL) *end = '\0';
|
|
size_t jvm_path_len = strlen(jvm_path);
|
|
size_t file_sep_len = strlen(os::file_separator());
|
|
const size_t len = jvm_path_len + file_sep_len + 20;
|
|
shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
|
|
if (shared_archive_path != NULL) {
|
|
jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
|
|
jvm_path, os::file_separator());
|
|
}
|
|
} else {
|
|
shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
|
|
}
|
|
return shared_archive_path;
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
// Determine whether LogVMOutput should be implicitly turned on.
|
|
static bool use_vm_log() {
|
|
if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
|
|
PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
|
|
PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
|
|
PrintAssembly || TraceDeoptimization || TraceDependencies ||
|
|
(VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
|
|
return true;
|
|
}
|
|
|
|
#ifdef COMPILER1
|
|
if (PrintC1Statistics) {
|
|
return true;
|
|
}
|
|
#endif // COMPILER1
|
|
|
|
#ifdef COMPILER2
|
|
if (PrintOptoAssembly || PrintOptoStatistics) {
|
|
return true;
|
|
}
|
|
#endif // COMPILER2
|
|
|
|
return false;
|
|
}
|
|
|
|
#endif // PRODUCT
|
|
|
|
bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption* option = args->options + index;
|
|
const char* tail;
|
|
if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
|
|
const char* vm_options_file,
|
|
const int vm_options_file_pos,
|
|
ScopedVMInitArgs* vm_options_file_args,
|
|
ScopedVMInitArgs* args_out) {
|
|
jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
if (vm_options_file_args->get()->nOptions < 1) {
|
|
return JNI_OK;
|
|
}
|
|
|
|
if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"A VM options file may not refer to a VM options file. "
|
|
"Specification of '-XX:VMOptionsFile=<file-name>' in the "
|
|
"options file '%s' in options container '%s' is an error.\n",
|
|
vm_options_file_args->vm_options_file_arg(),
|
|
vm_options_file_args->container_name());
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
return args_out->insert(args, vm_options_file_args->get(),
|
|
vm_options_file_pos);
|
|
}
|
|
|
|
// Expand -XX:VMOptionsFile found in args_in as needed.
|
|
// mod_args and args_out parameters may return values as needed.
|
|
jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
|
|
ScopedVMInitArgs* mod_args,
|
|
JavaVMInitArgs** args_out) {
|
|
jint code = match_special_option_and_act(args_in, mod_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
if (mod_args->is_set()) {
|
|
// args_in contains -XX:VMOptionsFile and mod_args contains the
|
|
// original options from args_in along with the options expanded
|
|
// from the VMOptionsFile. Return a short-hand to the caller.
|
|
*args_out = mod_args->get();
|
|
} else {
|
|
*args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
|
|
ScopedVMInitArgs* args_out) {
|
|
// Remaining part of option string
|
|
const char* tail;
|
|
ScopedVMInitArgs vm_options_file_args(args_out->container_name());
|
|
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption* option = args->options + index;
|
|
if (ArgumentsExt::process_options(option)) {
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:Flags=", &tail)) {
|
|
Arguments::set_jvm_flags_file(tail);
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
|
|
if (vm_options_file_args.found_vm_options_file_arg()) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The option '%s' is already specified in the options "
|
|
"container '%s' so the specification of '%s' in the "
|
|
"same options container is an error.\n",
|
|
vm_options_file_args.vm_options_file_arg(),
|
|
vm_options_file_args.container_name(),
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
vm_options_file_args.set_vm_options_file_arg(option->optionString);
|
|
// If there's a VMOptionsFile, parse that
|
|
jint code = insert_vm_options_file(args, tail, index,
|
|
&vm_options_file_args, args_out);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
|
|
if (args_out->is_set()) {
|
|
// The VMOptions file inserted some options so switch 'args'
|
|
// to the new set of options, and continue processing which
|
|
// preserves "last option wins" semantics.
|
|
args = args_out->get();
|
|
// The first option from the VMOptionsFile replaces the
|
|
// current option. So we back track to process the
|
|
// replacement option.
|
|
index--;
|
|
}
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+PrintVMOptions")) {
|
|
PrintVMOptions = true;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:-PrintVMOptions")) {
|
|
PrintVMOptions = false;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
|
|
IgnoreUnrecognizedVMOptions = true;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
|
|
IgnoreUnrecognizedVMOptions = false;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+PrintFlagsInitial")) {
|
|
CommandLineFlags::printFlags(tty, false);
|
|
vm_exit(0);
|
|
}
|
|
if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
|
|
#if INCLUDE_NMT
|
|
// The launcher did not setup nmt environment variable properly.
|
|
if (!MemTracker::check_launcher_nmt_support(tail)) {
|
|
warning("Native Memory Tracking did not setup properly, using wrong launcher?");
|
|
}
|
|
|
|
// Verify if nmt option is valid.
|
|
if (MemTracker::verify_nmt_option()) {
|
|
// Late initialization, still in single-threaded mode.
|
|
if (MemTracker::tracking_level() >= NMT_summary) {
|
|
MemTracker::init();
|
|
}
|
|
} else {
|
|
vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
|
|
}
|
|
continue;
|
|
#else
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Native Memory Tracking is not supported in this VM\n");
|
|
return JNI_ERR;
|
|
#endif
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
if (match_option(option, "-XX:+PrintFlagsWithComments")) {
|
|
CommandLineFlags::printFlags(tty, true);
|
|
vm_exit(0);
|
|
}
|
|
#endif
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
static void print_options(const JavaVMInitArgs *args) {
|
|
const char* tail;
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption *option = args->options + index;
|
|
if (match_option(option, "-XX:", &tail)) {
|
|
logOption(tail);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Arguments::handle_deprecated_print_gc_flags() {
|
|
if (PrintGC) {
|
|
log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
|
|
}
|
|
if (PrintGCDetails) {
|
|
log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
|
|
}
|
|
|
|
if (_gc_log_filename != NULL) {
|
|
// -Xloggc was used to specify a filename
|
|
const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
|
|
|
|
LogTarget(Error, logging) target;
|
|
LogStreamCHeap errstream(target);
|
|
return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
|
|
} else if (PrintGC || PrintGCDetails) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void Arguments::handle_extra_cms_flags(const char* msg) {
|
|
SpecialFlag flag;
|
|
const char *flag_name = "UseConcMarkSweepGC";
|
|
if (lookup_special_flag(flag_name, flag)) {
|
|
handle_aliases_and_deprecation(flag_name, /* print warning */ true);
|
|
warning("%s", msg);
|
|
}
|
|
}
|
|
|
|
// Parse entry point called from JNI_CreateJavaVM
|
|
|
|
jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
|
|
assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
|
|
|
|
// Initialize ranges, constraints and writeables
|
|
CommandLineFlagRangeList::init();
|
|
CommandLineFlagConstraintList::init();
|
|
CommandLineFlagWriteableList::init();
|
|
|
|
// If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
|
|
const char* hotspotrc = ".hotspotrc";
|
|
bool settings_file_specified = false;
|
|
bool needs_hotspotrc_warning = false;
|
|
ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
|
|
ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
|
|
|
|
// Pointers to current working set of containers
|
|
JavaVMInitArgs* cur_cmd_args;
|
|
JavaVMInitArgs* cur_java_options_args;
|
|
JavaVMInitArgs* cur_java_tool_options_args;
|
|
|
|
// Containers for modified/expanded options
|
|
ScopedVMInitArgs mod_cmd_args("cmd_line_args");
|
|
ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
|
|
ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
|
|
|
|
|
|
jint code =
|
|
parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = parse_java_options_environment_variable(&initial_java_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
|
|
&mod_java_tool_options_args,
|
|
&cur_java_tool_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_cmd_args,
|
|
&mod_cmd_args,
|
|
&cur_cmd_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_java_options_args.get(),
|
|
&mod_java_options_args,
|
|
&cur_java_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
const char* flags_file = Arguments::get_jvm_flags_file();
|
|
settings_file_specified = (flags_file != NULL);
|
|
|
|
if (IgnoreUnrecognizedVMOptions) {
|
|
cur_cmd_args->ignoreUnrecognized = true;
|
|
cur_java_tool_options_args->ignoreUnrecognized = true;
|
|
cur_java_options_args->ignoreUnrecognized = true;
|
|
}
|
|
|
|
// Parse specified settings file
|
|
if (settings_file_specified) {
|
|
if (!process_settings_file(flags_file, true,
|
|
cur_cmd_args->ignoreUnrecognized)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else {
|
|
#ifdef ASSERT
|
|
// Parse default .hotspotrc settings file
|
|
if (!process_settings_file(".hotspotrc", false,
|
|
cur_cmd_args->ignoreUnrecognized)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#else
|
|
struct stat buf;
|
|
if (os::stat(hotspotrc, &buf) == 0) {
|
|
needs_hotspotrc_warning = true;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (PrintVMOptions) {
|
|
print_options(cur_java_tool_options_args);
|
|
print_options(cur_cmd_args);
|
|
print_options(cur_java_options_args);
|
|
}
|
|
|
|
// Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
|
|
jint result = parse_vm_init_args(cur_java_tool_options_args,
|
|
cur_java_options_args,
|
|
cur_cmd_args);
|
|
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
// Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
|
|
SharedArchivePath = get_shared_archive_path();
|
|
if (SharedArchivePath == NULL) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
|
|
// Set up VerifySharedSpaces
|
|
if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
|
|
VerifySharedSpaces = true;
|
|
}
|
|
|
|
// Delay warning until here so that we've had a chance to process
|
|
// the -XX:-PrintWarnings flag
|
|
if (needs_hotspotrc_warning) {
|
|
warning("%s file is present but has been ignored. "
|
|
"Run with -XX:Flags=%s to load the file.",
|
|
hotspotrc, hotspotrc);
|
|
}
|
|
|
|
if (needs_module_property_warning) {
|
|
warning("Ignoring system property options whose names match the '-Djdk.module.*'."
|
|
" names that are reserved for internal use.");
|
|
}
|
|
|
|
#if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
|
|
UNSUPPORTED_OPTION(UseLargePages);
|
|
#endif
|
|
|
|
ArgumentsExt::report_unsupported_options();
|
|
|
|
#ifndef PRODUCT
|
|
if (TraceBytecodesAt != 0) {
|
|
TraceBytecodes = true;
|
|
}
|
|
if (CountCompiledCalls) {
|
|
if (UseCounterDecay) {
|
|
warning("UseCounterDecay disabled because CountCalls is set");
|
|
UseCounterDecay = false;
|
|
}
|
|
}
|
|
#endif // PRODUCT
|
|
|
|
if (ScavengeRootsInCode == 0) {
|
|
if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
|
|
warning("Forcing ScavengeRootsInCode non-zero");
|
|
}
|
|
ScavengeRootsInCode = 1;
|
|
}
|
|
|
|
if (!handle_deprecated_print_gc_flags()) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Set object alignment values.
|
|
set_object_alignment();
|
|
|
|
#if !INCLUDE_CDS
|
|
if (DumpSharedSpaces || RequireSharedSpaces) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Shared spaces are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
|
|
warning("Shared spaces are not supported in this VM");
|
|
FLAG_SET_DEFAULT(UseSharedSpaces, false);
|
|
FLAG_SET_DEFAULT(PrintSharedSpaces, false);
|
|
}
|
|
no_shared_spaces("CDS Disabled");
|
|
#endif // INCLUDE_CDS
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::apply_ergo() {
|
|
// Set flags based on ergonomics.
|
|
set_ergonomics_flags();
|
|
|
|
#if INCLUDE_JVMCI
|
|
set_jvmci_specific_flags();
|
|
#endif
|
|
|
|
set_shared_spaces_flags();
|
|
|
|
// Check the GC selections again.
|
|
if (!check_gc_consistency()) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
if (TieredCompilation) {
|
|
set_tiered_flags();
|
|
} else {
|
|
int max_compilation_policy_choice = 1;
|
|
#ifdef COMPILER2
|
|
if (is_server_compilation_mode_vm()) {
|
|
max_compilation_policy_choice = 2;
|
|
}
|
|
#endif
|
|
// Check if the policy is valid.
|
|
if (CompilationPolicyChoice >= max_compilation_policy_choice) {
|
|
vm_exit_during_initialization(
|
|
"Incompatible compilation policy selected", NULL);
|
|
}
|
|
// Scale CompileThreshold
|
|
// CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
|
|
if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
|
|
FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
|
|
}
|
|
}
|
|
|
|
#ifdef COMPILER2
|
|
#ifndef PRODUCT
|
|
if (PrintIdealGraphLevel > 0) {
|
|
FLAG_SET_ERGO(bool, PrintIdealGraph, true);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
// Set heap size based on available physical memory
|
|
set_heap_size();
|
|
|
|
ArgumentsExt::set_gc_specific_flags();
|
|
|
|
// Initialize Metaspace flags and alignments
|
|
Metaspace::ergo_initialize();
|
|
|
|
// Set bytecode rewriting flags
|
|
set_bytecode_flags();
|
|
|
|
// Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
|
|
jint code = set_aggressive_opts_flags();
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
// Turn off biased locking for locking debug mode flags,
|
|
// which are subtly different from each other but neither works with
|
|
// biased locking
|
|
if (UseHeavyMonitors
|
|
#ifdef COMPILER1
|
|
|| !UseFastLocking
|
|
#endif // COMPILER1
|
|
#if INCLUDE_JVMCI
|
|
|| !JVMCIUseFastLocking
|
|
#endif
|
|
) {
|
|
if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
|
|
// flag set to true on command line; warn the user that they
|
|
// can't enable biased locking here
|
|
warning("Biased Locking is not supported with locking debug flags"
|
|
"; ignoring UseBiasedLocking flag." );
|
|
}
|
|
UseBiasedLocking = false;
|
|
}
|
|
|
|
#ifdef CC_INTERP
|
|
// Clear flags not supported on zero.
|
|
FLAG_SET_DEFAULT(ProfileInterpreter, false);
|
|
FLAG_SET_DEFAULT(UseBiasedLocking, false);
|
|
LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
|
|
LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
|
|
#endif // CC_INTERP
|
|
|
|
#ifdef COMPILER2
|
|
if (!EliminateLocks) {
|
|
EliminateNestedLocks = false;
|
|
}
|
|
if (!Inline) {
|
|
IncrementalInline = false;
|
|
}
|
|
#ifndef PRODUCT
|
|
if (!IncrementalInline) {
|
|
AlwaysIncrementalInline = false;
|
|
}
|
|
#endif
|
|
if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
|
|
// nothing to use the profiling, turn if off
|
|
FLAG_SET_DEFAULT(TypeProfileLevel, 0);
|
|
}
|
|
#endif
|
|
|
|
if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
|
|
warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
|
|
DebugNonSafepoints = true;
|
|
}
|
|
|
|
if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
|
|
warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
|
|
}
|
|
|
|
if (UseOnStackReplacement && !UseLoopCounter) {
|
|
warning("On-stack-replacement requires loop counters; enabling loop counters");
|
|
FLAG_SET_DEFAULT(UseLoopCounter, true);
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
|
|
if (use_vm_log()) {
|
|
LogVMOutput = true;
|
|
}
|
|
}
|
|
#endif // PRODUCT
|
|
|
|
if (PrintCommandLineFlags) {
|
|
CommandLineFlags::printSetFlags(tty);
|
|
}
|
|
|
|
// Apply CPU specific policy for the BiasedLocking
|
|
if (UseBiasedLocking) {
|
|
if (!VM_Version::use_biased_locking() &&
|
|
!(FLAG_IS_CMDLINE(UseBiasedLocking))) {
|
|
UseBiasedLocking = false;
|
|
}
|
|
}
|
|
#ifdef COMPILER2
|
|
if (!UseBiasedLocking || EmitSync != 0) {
|
|
UseOptoBiasInlining = false;
|
|
}
|
|
#endif
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::adjust_after_os() {
|
|
if (UseNUMA) {
|
|
if (UseParallelGC || UseParallelOldGC) {
|
|
if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
|
|
FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
|
|
}
|
|
}
|
|
// UseNUMAInterleaving is set to ON for all collectors and
|
|
// platforms when UseNUMA is set to ON. NUMA-aware collectors
|
|
// such as the parallel collector for Linux and Solaris will
|
|
// interleave old gen and survivor spaces on top of NUMA
|
|
// allocation policy for the eden space.
|
|
// Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
|
|
// all platforms and ParallelGC on Windows will interleave all
|
|
// of the heap spaces across NUMA nodes.
|
|
if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
|
|
FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
|
|
}
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
int Arguments::PropertyList_count(SystemProperty* pl) {
|
|
int count = 0;
|
|
while(pl != NULL) {
|
|
count++;
|
|
pl = pl->next();
|
|
}
|
|
return count;
|
|
}
|
|
|
|
// Return the number of readable properties.
|
|
int Arguments::PropertyList_readable_count(SystemProperty* pl) {
|
|
int count = 0;
|
|
while(pl != NULL) {
|
|
if (pl->is_readable()) {
|
|
count++;
|
|
}
|
|
pl = pl->next();
|
|
}
|
|
return count;
|
|
}
|
|
|
|
const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
|
|
assert(key != NULL, "just checking");
|
|
SystemProperty* prop;
|
|
for (prop = pl; prop != NULL; prop = prop->next()) {
|
|
if (strcmp(key, prop->key()) == 0) return prop->value();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// Return the value of the requested property provided that it is a readable property.
|
|
const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
|
|
assert(key != NULL, "just checking");
|
|
SystemProperty* prop;
|
|
// Return the property value if the keys match and the property is not internal or
|
|
// it's the special internal property "jdk.boot.class.path.append".
|
|
for (prop = pl; prop != NULL; prop = prop->next()) {
|
|
if (strcmp(key, prop->key()) == 0) {
|
|
if (!prop->internal()) {
|
|
return prop->value();
|
|
} else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
|
|
return prop->value();
|
|
} else {
|
|
// Property is internal and not jdk.boot.class.path.append so return NULL.
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
|
|
int count = 0;
|
|
const char* ret_val = NULL;
|
|
|
|
while(pl != NULL) {
|
|
if(count >= index) {
|
|
ret_val = pl->key();
|
|
break;
|
|
}
|
|
count++;
|
|
pl = pl->next();
|
|
}
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
|
|
int count = 0;
|
|
char* ret_val = NULL;
|
|
|
|
while(pl != NULL) {
|
|
if(count >= index) {
|
|
ret_val = pl->value();
|
|
break;
|
|
}
|
|
count++;
|
|
pl = pl->next();
|
|
}
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
|
|
SystemProperty* p = *plist;
|
|
if (p == NULL) {
|
|
*plist = new_p;
|
|
} else {
|
|
while (p->next() != NULL) {
|
|
p = p->next();
|
|
}
|
|
p->set_next(new_p);
|
|
}
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
|
|
bool writeable, bool internal) {
|
|
if (plist == NULL)
|
|
return;
|
|
|
|
SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
|
|
PropertyList_add(plist, new_p);
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty *element) {
|
|
PropertyList_add(&_system_properties, element);
|
|
}
|
|
|
|
// This add maintains unique property key in the list.
|
|
void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
|
|
PropertyAppendable append, PropertyWriteable writeable,
|
|
PropertyInternal internal) {
|
|
if (plist == NULL)
|
|
return;
|
|
|
|
// If property key exist then update with new value.
|
|
SystemProperty* prop;
|
|
for (prop = *plist; prop != NULL; prop = prop->next()) {
|
|
if (strcmp(k, prop->key()) == 0) {
|
|
if (append == AppendProperty) {
|
|
prop->append_value(v);
|
|
} else {
|
|
prop->set_value(v);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
|
|
}
|
|
|
|
// Copies src into buf, replacing "%%" with "%" and "%p" with pid
|
|
// Returns true if all of the source pointed by src has been copied over to
|
|
// the destination buffer pointed by buf. Otherwise, returns false.
|
|
// Notes:
|
|
// 1. If the length (buflen) of the destination buffer excluding the
|
|
// NULL terminator character is not long enough for holding the expanded
|
|
// pid characters, it also returns false instead of returning the partially
|
|
// expanded one.
|
|
// 2. The passed in "buflen" should be large enough to hold the null terminator.
|
|
bool Arguments::copy_expand_pid(const char* src, size_t srclen,
|
|
char* buf, size_t buflen) {
|
|
const char* p = src;
|
|
char* b = buf;
|
|
const char* src_end = &src[srclen];
|
|
char* buf_end = &buf[buflen - 1];
|
|
|
|
while (p < src_end && b < buf_end) {
|
|
if (*p == '%') {
|
|
switch (*(++p)) {
|
|
case '%': // "%%" ==> "%"
|
|
*b++ = *p++;
|
|
break;
|
|
case 'p': { // "%p" ==> current process id
|
|
// buf_end points to the character before the last character so
|
|
// that we could write '\0' to the end of the buffer.
|
|
size_t buf_sz = buf_end - b + 1;
|
|
int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
|
|
|
|
// if jio_snprintf fails or the buffer is not long enough to hold
|
|
// the expanded pid, returns false.
|
|
if (ret < 0 || ret >= (int)buf_sz) {
|
|
return false;
|
|
} else {
|
|
b += ret;
|
|
assert(*b == '\0', "fail in copy_expand_pid");
|
|
if (p == src_end && b == buf_end + 1) {
|
|
// reach the end of the buffer.
|
|
return true;
|
|
}
|
|
}
|
|
p++;
|
|
break;
|
|
}
|
|
default :
|
|
*b++ = '%';
|
|
}
|
|
} else {
|
|
*b++ = *p++;
|
|
}
|
|
}
|
|
*b = '\0';
|
|
return (p == src_end); // return false if not all of the source was copied
|
|
}
|