author | herrick |
Wed, 27 Mar 2019 08:27:58 -0400 | |
branch | JDK-8200758-branch |
changeset 57288 | 0be43184f52a |
parent 53430 | ccfd4e614bb8 |
child 54669 | ad45b3802d4e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2019, 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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||
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#ifndef SHARE_JVMCI_JVMCIENV_HPP |
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#define SHARE_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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bool _retryable; |
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const char* _failure_reason; |
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// Specifies if _failure_reason is on the C heap. |
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bool _failure_reason_on_C_heap; |
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// Cache JVMTI state. Defined as bytes so that reading them from Java |
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// via Unsafe is well defined (the C++ type for bool is implementation |
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// defined and may not be the same as a Java boolean). |
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jbyte _jvmti_can_hotswap_or_post_breakpoint; |
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jbyte _jvmti_can_access_local_variables; |
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jbyte _jvmti_can_post_on_exceptions; |
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jbyte _jvmti_can_pop_frame; |
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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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bool jvmti_state_changed() const; |
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bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint != 0; } |
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bool jvmti_can_access_local_variables() const { return _jvmti_can_access_local_variables != 0; } |
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bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions != 0; } |
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bool jvmti_can_pop_frame() const { return _jvmti_can_pop_frame != 0; } |
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const char* failure_reason() { return _failure_reason; } |
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bool failure_reason_on_C_heap() { return _failure_reason_on_C_heap; } |
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bool retryable() { return _retryable; } |
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void set_failure(bool retryable, const char* reason, bool reason_on_C_heap = false) { |
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_failure_reason = reason; |
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_failure_reason_on_C_heap = reason_on_C_heap; |
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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_JVMCI_JVMCIENV_HPP |