606 lines
24 KiB
C++
606 lines
24 KiB
C++
/*
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* Copyright (c) 1999, 2015, 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 "jvmci/jvmciEnv.hpp"
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#include "classfile/javaAssertions.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "code/codeCache.hpp"
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#include "code/scopeDesc.hpp"
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#include "runtime/sweeper.hpp"
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#include "compiler/compileBroker.hpp"
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#include "compiler/compileLog.hpp"
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#include "compiler/compilerOracle.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/universe.inline.hpp"
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#include "oops/methodData.hpp"
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#include "oops/objArrayKlass.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/init.hpp"
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#include "runtime/reflection.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "utilities/dtrace.hpp"
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#include "jvmci/jvmciRuntime.hpp"
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#include "jvmci/jvmciJavaClasses.hpp"
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JVMCIEnv::JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter):
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_task(task),
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_system_dictionary_modification_counter(system_dictionary_modification_counter),
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_failure_reason(NULL),
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_retryable(true)
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{
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// Get Jvmti capabilities under lock to get consistent values.
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MutexLocker mu(JvmtiThreadState_lock);
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_jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
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_jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
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_jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
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}
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// ------------------------------------------------------------------
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// Note: the logic of this method should mirror the logic of
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// constantPoolOopDesc::verify_constant_pool_resolve.
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bool JVMCIEnv::check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass) {
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if (accessing_klass->is_objArray_klass()) {
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accessing_klass = ObjArrayKlass::cast(accessing_klass())->bottom_klass();
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}
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if (!accessing_klass->is_instance_klass()) {
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return true;
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}
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if (resolved_klass->is_objArray_klass()) {
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// Find the element klass, if this is an array.
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resolved_klass = ObjArrayKlass::cast(resolved_klass())->bottom_klass();
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}
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if (resolved_klass->is_instance_klass()) {
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return Reflection::verify_class_access(accessing_klass(), resolved_klass(), true);
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}
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return true;
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}
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// ------------------------------------------------------------------
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KlassHandle JVMCIEnv::get_klass_by_name_impl(KlassHandle& accessing_klass,
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const constantPoolHandle& cpool,
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Symbol* sym,
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bool require_local) {
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JVMCI_EXCEPTION_CONTEXT;
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// Now we need to check the SystemDictionary
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if (sym->byte_at(0) == 'L' &&
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sym->byte_at(sym->utf8_length()-1) == ';') {
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// This is a name from a signature. Strip off the trimmings.
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// Call recursive to keep scope of strippedsym.
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TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
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sym->utf8_length()-2,
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CHECK_(KlassHandle()));
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return get_klass_by_name_impl(accessing_klass, cpool, strippedsym, require_local);
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}
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Handle loader(THREAD, (oop)NULL);
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Handle domain(THREAD, (oop)NULL);
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if (!accessing_klass.is_null()) {
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loader = Handle(THREAD, accessing_klass->class_loader());
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domain = Handle(THREAD, accessing_klass->protection_domain());
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}
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KlassHandle found_klass;
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{
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ttyUnlocker ttyul; // release tty lock to avoid ordering problems
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MutexLocker ml(Compile_lock);
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Klass* kls;
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if (!require_local) {
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kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, CHECK_(KlassHandle()));
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} else {
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kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain, CHECK_(KlassHandle()));
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}
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found_klass = KlassHandle(THREAD, kls);
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}
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// If we fail to find an array klass, look again for its element type.
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// The element type may be available either locally or via constraints.
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// In either case, if we can find the element type in the system dictionary,
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// we must build an array type around it. The CI requires array klasses
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// to be loaded if their element klasses are loaded, except when memory
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// is exhausted.
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if (sym->byte_at(0) == '[' &&
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(sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
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// We have an unloaded array.
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// Build it on the fly if the element class exists.
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TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
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sym->utf8_length()-1,
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CHECK_(KlassHandle()));
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// Get element Klass recursively.
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KlassHandle elem_klass =
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get_klass_by_name_impl(accessing_klass,
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cpool,
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elem_sym,
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require_local);
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if (!elem_klass.is_null()) {
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// Now make an array for it
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return elem_klass->array_klass(CHECK_(KlassHandle()));
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}
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}
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if (found_klass.is_null() && !cpool.is_null() && cpool->has_preresolution()) {
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// Look inside the constant pool for pre-resolved class entries.
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for (int i = cpool->length() - 1; i >= 1; i--) {
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if (cpool->tag_at(i).is_klass()) {
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Klass* kls = cpool->resolved_klass_at(i);
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if (kls->name() == sym) {
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return kls;
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}
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}
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}
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}
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return found_klass();
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}
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// ------------------------------------------------------------------
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KlassHandle JVMCIEnv::get_klass_by_name(KlassHandle accessing_klass,
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Symbol* klass_name,
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bool require_local) {
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ResourceMark rm;
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constantPoolHandle cpool;
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return get_klass_by_name_impl(accessing_klass,
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cpool,
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klass_name,
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require_local);
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}
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// ------------------------------------------------------------------
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// Implementation of get_klass_by_index.
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KlassHandle JVMCIEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
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int index,
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bool& is_accessible,
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KlassHandle accessor) {
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JVMCI_EXCEPTION_CONTEXT;
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KlassHandle klass (THREAD, ConstantPool::klass_at_if_loaded(cpool, index));
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Symbol* klass_name = NULL;
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if (klass.is_null()) {
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klass_name = cpool->klass_name_at(index);
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}
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if (klass.is_null()) {
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// Not found in constant pool. Use the name to do the lookup.
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KlassHandle k = get_klass_by_name_impl(accessor,
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cpool,
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klass_name,
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false);
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// Calculate accessibility the hard way.
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if (k.is_null()) {
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is_accessible = false;
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} else if (k->class_loader() != accessor->class_loader() &&
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get_klass_by_name_impl(accessor, cpool, k->name(), true).is_null()) {
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// Loaded only remotely. Not linked yet.
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is_accessible = false;
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} else {
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// Linked locally, and we must also check public/private, etc.
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is_accessible = check_klass_accessibility(accessor, k);
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}
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if (!is_accessible) {
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return KlassHandle();
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}
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return k;
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}
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// It is known to be accessible, since it was found in the constant pool.
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is_accessible = true;
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return klass;
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}
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// ------------------------------------------------------------------
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// Get a klass from the constant pool.
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KlassHandle JVMCIEnv::get_klass_by_index(const constantPoolHandle& cpool,
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int index,
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bool& is_accessible,
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KlassHandle accessor) {
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ResourceMark rm;
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KlassHandle result = get_klass_by_index_impl(cpool, index, is_accessible, accessor);
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return result;
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}
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// ------------------------------------------------------------------
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// Implementation of get_field_by_index.
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//
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// Implementation note: the results of field lookups are cached
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// in the accessor klass.
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void JVMCIEnv::get_field_by_index_impl(instanceKlassHandle klass, fieldDescriptor& field_desc,
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int index) {
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JVMCI_EXCEPTION_CONTEXT;
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assert(klass->is_linked(), "must be linked before using its constant-pool");
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constantPoolHandle cpool(thread, klass->constants());
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// Get the field's name, signature, and type.
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Symbol* name = cpool->name_ref_at(index);
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int nt_index = cpool->name_and_type_ref_index_at(index);
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int sig_index = cpool->signature_ref_index_at(nt_index);
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Symbol* signature = cpool->symbol_at(sig_index);
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// Get the field's declared holder.
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int holder_index = cpool->klass_ref_index_at(index);
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bool holder_is_accessible;
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KlassHandle declared_holder = get_klass_by_index(cpool, holder_index,
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holder_is_accessible,
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klass);
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// The declared holder of this field may not have been loaded.
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// Bail out with partial field information.
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if (!holder_is_accessible) {
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return;
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}
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// Perform the field lookup.
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Klass* canonical_holder =
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InstanceKlass::cast(declared_holder())->find_field(name, signature, &field_desc);
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if (canonical_holder == NULL) {
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return;
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}
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assert(canonical_holder == field_desc.field_holder(), "just checking");
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}
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// ------------------------------------------------------------------
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// Get a field by index from a klass's constant pool.
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void JVMCIEnv::get_field_by_index(instanceKlassHandle accessor, fieldDescriptor& fd, int index) {
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ResourceMark rm;
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return get_field_by_index_impl(accessor, fd, index);
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}
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// ------------------------------------------------------------------
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// Perform an appropriate method lookup based on accessor, holder,
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// name, signature, and bytecode.
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methodHandle JVMCIEnv::lookup_method(instanceKlassHandle h_accessor,
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instanceKlassHandle h_holder,
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Symbol* name,
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Symbol* sig,
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Bytecodes::Code bc) {
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JVMCI_EXCEPTION_CONTEXT;
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LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
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methodHandle dest_method;
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LinkInfo link_info(h_holder, name, sig, h_accessor, /*check_access*/true);
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switch (bc) {
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case Bytecodes::_invokestatic:
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dest_method =
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LinkResolver::resolve_static_call_or_null(link_info);
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break;
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case Bytecodes::_invokespecial:
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dest_method =
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LinkResolver::resolve_special_call_or_null(link_info);
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break;
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case Bytecodes::_invokeinterface:
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dest_method =
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LinkResolver::linktime_resolve_interface_method_or_null(link_info);
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break;
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case Bytecodes::_invokevirtual:
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dest_method =
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LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
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break;
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default: ShouldNotReachHere();
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}
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return dest_method;
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}
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// ------------------------------------------------------------------
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methodHandle JVMCIEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
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int index, Bytecodes::Code bc,
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instanceKlassHandle accessor) {
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if (bc == Bytecodes::_invokedynamic) {
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ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
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bool is_resolved = !cpce->is_f1_null();
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if (is_resolved) {
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// Get the invoker Method* from the constant pool.
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// (The appendix argument, if any, will be noted in the method's signature.)
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Method* adapter = cpce->f1_as_method();
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return methodHandle(adapter);
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}
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return NULL;
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}
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int holder_index = cpool->klass_ref_index_at(index);
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bool holder_is_accessible;
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KlassHandle holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
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// Get the method's name and signature.
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Symbol* name_sym = cpool->name_ref_at(index);
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Symbol* sig_sym = cpool->signature_ref_at(index);
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if (cpool->has_preresolution()
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|| (holder() == SystemDictionary::MethodHandle_klass() &&
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MethodHandles::is_signature_polymorphic_name(holder(), name_sym))) {
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// Short-circuit lookups for JSR 292-related call sites.
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// That is, do not rely only on name-based lookups, because they may fail
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// if the names are not resolvable in the boot class loader (7056328).
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switch (bc) {
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case Bytecodes::_invokevirtual:
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case Bytecodes::_invokeinterface:
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case Bytecodes::_invokespecial:
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case Bytecodes::_invokestatic:
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{
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Method* m = ConstantPool::method_at_if_loaded(cpool, index);
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if (m != NULL) {
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return m;
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}
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}
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break;
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}
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}
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if (holder_is_accessible) { // Our declared holder is loaded.
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instanceKlassHandle lookup = get_instance_klass_for_declared_method_holder(holder);
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methodHandle m = lookup_method(accessor, lookup, name_sym, sig_sym, bc);
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if (!m.is_null() &&
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(bc == Bytecodes::_invokestatic
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? InstanceKlass::cast(m->method_holder())->is_not_initialized()
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: !InstanceKlass::cast(m->method_holder())->is_loaded())) {
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m = NULL;
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}
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if (!m.is_null()) {
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// We found the method.
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return m;
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}
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}
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// Either the declared holder was not loaded, or the method could
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// not be found.
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return NULL;
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}
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// ------------------------------------------------------------------
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instanceKlassHandle JVMCIEnv::get_instance_klass_for_declared_method_holder(KlassHandle method_holder) {
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// For the case of <array>.clone(), the method holder can be an ArrayKlass*
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// instead of an InstanceKlass*. For that case simply pretend that the
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// declared holder is Object.clone since that's where the call will bottom out.
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if (method_holder->is_instance_klass()) {
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return instanceKlassHandle(method_holder());
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} else if (method_holder->is_array_klass()) {
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return instanceKlassHandle(SystemDictionary::Object_klass());
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} else {
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ShouldNotReachHere();
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}
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return NULL;
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}
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// ------------------------------------------------------------------
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methodHandle JVMCIEnv::get_method_by_index(const constantPoolHandle& cpool,
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int index, Bytecodes::Code bc,
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instanceKlassHandle accessor) {
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ResourceMark rm;
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return get_method_by_index_impl(cpool, index, bc, accessor);
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}
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// ------------------------------------------------------------------
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// Check for changes to the system dictionary during compilation
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// class loads, evolution, breakpoints
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JVMCIEnv::CodeInstallResult JVMCIEnv::check_for_system_dictionary_modification(Dependencies* dependencies, Handle compiled_code,
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JVMCIEnv* env, char** failure_detail) {
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// If JVMTI capabilities were enabled during compile, the compilation is invalidated.
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if (env != NULL) {
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if (!env->_jvmti_can_hotswap_or_post_breakpoint && JvmtiExport::can_hotswap_or_post_breakpoint()) {
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*failure_detail = (char*) "Hotswapping or breakpointing was enabled during compilation";
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return JVMCIEnv::dependencies_failed;
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}
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}
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// Dependencies must be checked when the system dictionary changes
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// or if we don't know whether it has changed (i.e., env == NULL).
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// In debug mode, always check dependencies.
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bool counter_changed = env != NULL && env->_system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
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bool verify_deps = env == NULL || trueInDebug || JavaAssertions::enabled(SystemDictionary::HotSpotInstalledCode_klass()->name()->as_C_string(), true);
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if (!counter_changed && !verify_deps) {
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return JVMCIEnv::ok;
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}
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for (Dependencies::DepStream deps(dependencies); deps.next(); ) {
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Klass* witness = deps.check_dependency();
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if (witness != NULL) {
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// Use a fixed size buffer to prevent the string stream from
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// resizing in the context of an inner resource mark.
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char* buffer = NEW_RESOURCE_ARRAY(char, O_BUFLEN);
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stringStream st(buffer, O_BUFLEN);
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deps.print_dependency(witness, true, &st);
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*failure_detail = st.as_string();
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if (env == NULL || counter_changed) {
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return JVMCIEnv::dependencies_failed;
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} else {
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// The dependencies were invalid at the time of installation
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// without any intervening modification of the system
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// dictionary. That means they were invalidly constructed.
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return JVMCIEnv::dependencies_invalid;
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}
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}
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if (LogCompilation) {
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deps.log_dependency();
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}
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}
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return JVMCIEnv::ok;
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}
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// ------------------------------------------------------------------
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JVMCIEnv::CodeInstallResult JVMCIEnv::register_method(
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const methodHandle& method,
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nmethod*& nm,
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int entry_bci,
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CodeOffsets* offsets,
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int orig_pc_offset,
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CodeBuffer* code_buffer,
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int frame_words,
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OopMapSet* oop_map_set,
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ExceptionHandlerTable* handler_table,
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AbstractCompiler* compiler,
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DebugInformationRecorder* debug_info,
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Dependencies* dependencies,
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JVMCIEnv* env,
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int compile_id,
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bool has_unsafe_access,
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bool has_wide_vector,
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Handle installed_code,
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Handle compiled_code,
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Handle speculation_log) {
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JVMCI_EXCEPTION_CONTEXT;
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nm = NULL;
|
|
int comp_level = CompLevel_full_optimization;
|
|
char* failure_detail = NULL;
|
|
JVMCIEnv::CodeInstallResult result;
|
|
{
|
|
// To prevent compile queue updates.
|
|
MutexLocker locker(MethodCompileQueue_lock, THREAD);
|
|
|
|
// Prevent SystemDictionary::add_to_hierarchy from running
|
|
// and invalidating our dependencies until we install this method.
|
|
MutexLocker ml(Compile_lock);
|
|
|
|
// Encode the dependencies now, so we can check them right away.
|
|
dependencies->encode_content_bytes();
|
|
|
|
// Check for {class loads, evolution, breakpoints} during compilation
|
|
result = check_for_system_dictionary_modification(dependencies, compiled_code, env, &failure_detail);
|
|
if (result != JVMCIEnv::ok) {
|
|
// While not a true deoptimization, it is a preemptive decompile.
|
|
MethodData* mdp = method()->method_data();
|
|
if (mdp != NULL) {
|
|
mdp->inc_decompile_count();
|
|
#ifdef ASSERT
|
|
if (mdp->decompile_count() > (uint)PerMethodRecompilationCutoff) {
|
|
ResourceMark m;
|
|
tty->print_cr("WARN: endless recompilation of %s. Method was set to not compilable.", method()->name_and_sig_as_C_string());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// All buffers in the CodeBuffer are allocated in the CodeCache.
|
|
// If the code buffer is created on each compile attempt
|
|
// as in C2, then it must be freed.
|
|
//code_buffer->free_blob();
|
|
} else {
|
|
ImplicitExceptionTable implicit_tbl;
|
|
nm = nmethod::new_nmethod(method,
|
|
compile_id,
|
|
entry_bci,
|
|
offsets,
|
|
orig_pc_offset,
|
|
debug_info, dependencies, code_buffer,
|
|
frame_words, oop_map_set,
|
|
handler_table, &implicit_tbl,
|
|
compiler, comp_level, installed_code, speculation_log);
|
|
|
|
// Free codeBlobs
|
|
//code_buffer->free_blob();
|
|
if (nm == NULL) {
|
|
// The CodeCache is full. Print out warning and disable compilation.
|
|
{
|
|
MutexUnlocker ml(Compile_lock);
|
|
MutexUnlocker locker(MethodCompileQueue_lock);
|
|
CompileBroker::handle_full_code_cache(CodeCache::get_code_blob_type(comp_level));
|
|
}
|
|
} else {
|
|
nm->set_has_unsafe_access(has_unsafe_access);
|
|
nm->set_has_wide_vectors(has_wide_vector);
|
|
|
|
// Record successful registration.
|
|
// (Put nm into the task handle *before* publishing to the Java heap.)
|
|
CompileTask* task = env == NULL ? NULL : env->task();
|
|
if (task != NULL) {
|
|
task->set_code(nm);
|
|
}
|
|
|
|
if (installed_code->is_a(HotSpotNmethod::klass()) && HotSpotNmethod::isDefault(installed_code())) {
|
|
if (entry_bci == InvocationEntryBci) {
|
|
if (TieredCompilation) {
|
|
// If there is an old version we're done with it
|
|
nmethod* old = method->code();
|
|
if (TraceMethodReplacement && old != NULL) {
|
|
ResourceMark rm;
|
|
char *method_name = method->name_and_sig_as_C_string();
|
|
tty->print_cr("Replacing method %s", method_name);
|
|
}
|
|
if (old != NULL ) {
|
|
old->make_not_entrant();
|
|
}
|
|
}
|
|
if (TraceNMethodInstalls) {
|
|
ResourceMark rm;
|
|
char *method_name = method->name_and_sig_as_C_string();
|
|
ttyLocker ttyl;
|
|
tty->print_cr("Installing method (%d) %s [entry point: %p]",
|
|
comp_level,
|
|
method_name, nm->entry_point());
|
|
}
|
|
// Allow the code to be executed
|
|
method->set_code(method, nm);
|
|
} else {
|
|
if (TraceNMethodInstalls ) {
|
|
ResourceMark rm;
|
|
char *method_name = method->name_and_sig_as_C_string();
|
|
ttyLocker ttyl;
|
|
tty->print_cr("Installing osr method (%d) %s @ %d",
|
|
comp_level,
|
|
method_name,
|
|
entry_bci);
|
|
}
|
|
InstanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
|
|
}
|
|
}
|
|
}
|
|
result = nm != NULL ? JVMCIEnv::ok :JVMCIEnv::cache_full;
|
|
}
|
|
}
|
|
|
|
// String creation must be done outside lock
|
|
if (failure_detail != NULL) {
|
|
// A failure to allocate the string is silently ignored.
|
|
Handle message = java_lang_String::create_from_str(failure_detail, THREAD);
|
|
HotSpotCompiledNmethod::set_installationFailureMessage(compiled_code, message());
|
|
}
|
|
|
|
// JVMTI -- compiled method notification (must be done outside lock)
|
|
if (nm != NULL) {
|
|
nm->post_compiled_method_load_event();
|
|
|
|
if (env == NULL) {
|
|
// This compile didn't come through the CompileBroker so perform the printing here
|
|
DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, compiler);
|
|
nm->maybe_print_nmethod(directive);
|
|
DirectivesStack::release(directive);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|