185 lines
7.6 KiB
C++
185 lines
7.6 KiB
C++
/*
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* Copyright (c) 1999, 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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#ifndef SHARE_VM_JVMCI_JVMCIENV_HPP
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#define SHARE_VM_JVMCI_JVMCIENV_HPP
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#include "classfile/systemDictionary.hpp"
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#include "code/debugInfoRec.hpp"
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#include "code/dependencies.hpp"
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#include "code/exceptionHandlerTable.hpp"
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#include "compiler/oopMap.hpp"
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#include "runtime/thread.hpp"
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class CompileTask;
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// Bring the JVMCI compiler thread into the VM state.
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#define JVMCI_VM_ENTRY_MARK \
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JavaThread* thread = JavaThread::current(); \
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ThreadInVMfromNative __tiv(thread); \
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ResetNoHandleMark rnhm; \
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HandleMarkCleaner __hm(thread); \
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Thread* THREAD = thread; \
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debug_only(VMNativeEntryWrapper __vew;)
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#define JVMCI_EXCEPTION_CONTEXT \
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JavaThread* thread=JavaThread::current(); \
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Thread* THREAD = thread;
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//
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// This class is the top level broker for requests from the compiler
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// to the VM.
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class JVMCIEnv : StackObj {
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CI_PACKAGE_ACCESS_TO
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friend class JVMCIVMStructs;
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friend class CompileBroker;
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friend class Dependencies; // for get_object, during logging
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public:
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enum CodeInstallResult {
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ok,
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dependencies_failed,
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dependencies_invalid,
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cache_full,
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code_too_large
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};
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// Look up a klass by name from a particular class loader (the accessor's).
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// If require_local, result must be defined in that class loader, or NULL.
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// If !require_local, a result from remote class loader may be reported,
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// if sufficient class loader constraints exist such that initiating
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// a class loading request from the given loader is bound to return
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// the class defined in the remote loader (or throw an error).
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//
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// Return an unloaded klass if !require_local and no class at all is found.
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//
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// The CI treats a klass as loaded if it is consistently defined in
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// another loader, even if it hasn't yet been loaded in all loaders
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// that could potentially see it via delegation.
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static Klass* get_klass_by_name(Klass* accessing_klass, Symbol* klass_name, bool require_local);
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// Constant pool access.
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static Klass* get_klass_by_index(const constantPoolHandle& cpool,
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int klass_index,
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bool& is_accessible,
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Klass* loading_klass);
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static void get_field_by_index(InstanceKlass* loading_klass, fieldDescriptor& fd,
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int field_index);
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static methodHandle get_method_by_index(const constantPoolHandle& cpool,
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int method_index, Bytecodes::Code bc,
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InstanceKlass* loading_klass);
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JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
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private:
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CompileTask* _task;
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int _system_dictionary_modification_counter;
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// Compilation result values
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const char* _failure_reason;
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bool _retryable;
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// Cache JVMTI state
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bool _jvmti_can_hotswap_or_post_breakpoint;
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bool _jvmti_can_access_local_variables;
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bool _jvmti_can_post_on_exceptions;
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// Implementation methods for loading and constant pool access.
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static Klass* get_klass_by_name_impl(Klass* accessing_klass,
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const constantPoolHandle& cpool,
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Symbol* klass_name,
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bool require_local);
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static Klass* get_klass_by_index_impl(const constantPoolHandle& cpool,
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int klass_index,
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bool& is_accessible,
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Klass* loading_klass);
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static void get_field_by_index_impl(InstanceKlass* loading_klass, fieldDescriptor& fd,
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int field_index);
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static methodHandle get_method_by_index_impl(const constantPoolHandle& cpool,
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int method_index, Bytecodes::Code bc,
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InstanceKlass* loading_klass);
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// Helper methods
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static bool check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass);
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static methodHandle lookup_method(InstanceKlass* accessor,
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Klass* holder,
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Symbol* name,
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Symbol* sig,
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Bytecodes::Code bc,
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constantTag tag);
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private:
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// Is this thread currently in the VM state?
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static bool is_in_vm();
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// Helper routine for determining the validity of a compilation
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// with respect to concurrent class loading.
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static JVMCIEnv::CodeInstallResult validate_compile_task_dependencies(Dependencies* target, Handle compiled_code,
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JVMCIEnv* env, char** failure_detail);
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public:
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CompileTask* task() { return _task; }
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const char* failure_reason() { return _failure_reason; }
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bool retryable() { return _retryable; }
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void set_failure(const char* reason, bool retryable) {
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_failure_reason = reason;
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_retryable = retryable;
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}
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// Register the result of a compilation.
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static JVMCIEnv::CodeInstallResult register_method(
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const methodHandle& target,
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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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// converts the Klass* representing the holder of a method into a
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// InstanceKlass*. This is needed since the holder of a method in
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// the bytecodes could be an array type. Basically this converts
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// array types into java/lang/Object and other types stay as they are.
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static InstanceKlass* get_instance_klass_for_declared_method_holder(Klass* klass);
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};
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#endif // SHARE_VM_JVMCI_JVMCIENV_HPP
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