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/*
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* Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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#include "incls/_precompiled.incl"
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#include "incls/_ciEnv.cpp.incl"
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// ciEnv
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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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ciObject* ciEnv::_null_object_instance;
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ciMethodKlass* ciEnv::_method_klass_instance;
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ciSymbolKlass* ciEnv::_symbol_klass_instance;
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ciKlassKlass* ciEnv::_klass_klass_instance;
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ciInstanceKlassKlass* ciEnv::_instance_klass_klass_instance;
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ciTypeArrayKlassKlass* ciEnv::_type_array_klass_klass_instance;
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ciObjArrayKlassKlass* ciEnv::_obj_array_klass_klass_instance;
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ciInstanceKlass* ciEnv::_ArrayStoreException;
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ciInstanceKlass* ciEnv::_Class;
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ciInstanceKlass* ciEnv::_ClassCastException;
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ciInstanceKlass* ciEnv::_Object;
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ciInstanceKlass* ciEnv::_Throwable;
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ciInstanceKlass* ciEnv::_Thread;
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ciInstanceKlass* ciEnv::_OutOfMemoryError;
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ciInstanceKlass* ciEnv::_String;
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ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
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ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
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ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
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jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
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jobject ciEnv::_ArrayStoreException_handle = NULL;
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jobject ciEnv::_ClassCastException_handle = NULL;
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#ifndef PRODUCT
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static bool firstEnv = true;
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#endif /* PRODUCT */
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// ------------------------------------------------------------------
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// ciEnv::ciEnv
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ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) {
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VM_ENTRY_MARK;
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// Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
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thread->set_env(this);
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assert(ciEnv::current() == this, "sanity");
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_oop_recorder = NULL;
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_debug_info = NULL;
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_dependencies = NULL;
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_failure_reason = NULL;
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_compilable = MethodCompilable;
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_break_at_compile = false;
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_compiler_data = NULL;
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#ifndef PRODUCT
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assert(!firstEnv, "not initialized properly");
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#endif /* !PRODUCT */
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_system_dictionary_modification_counter = system_dictionary_modification_counter;
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_num_inlined_bytecodes = 0;
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assert(task == NULL || thread->task() == task, "sanity");
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_task = task;
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_log = NULL;
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// Temporary buffer for creating symbols and such.
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_name_buffer = NULL;
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_name_buffer_len = 0;
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_arena = &_ciEnv_arena;
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_factory = new (_arena) ciObjectFactory(_arena, 128);
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// Preload commonly referenced system ciObjects.
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// During VM initialization, these instances have not yet been created.
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// Assertions ensure that these instances are not accessed before
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// their initialization.
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assert(Universe::is_fully_initialized(), "should be complete");
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oop o = Universe::null_ptr_exception_instance();
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assert(o != NULL, "should have been initialized");
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_NullPointerException_instance = get_object(o)->as_instance();
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o = Universe::arithmetic_exception_instance();
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assert(o != NULL, "should have been initialized");
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_ArithmeticException_instance = get_object(o)->as_instance();
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_ArrayIndexOutOfBoundsException_instance = NULL;
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_ArrayStoreException_instance = NULL;
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_ClassCastException_instance = NULL;
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}
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ciEnv::ciEnv(Arena* arena) {
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ASSERT_IN_VM;
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// Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
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CompilerThread* current_thread = CompilerThread::current();
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assert(current_thread->env() == NULL, "must be");
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current_thread->set_env(this);
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assert(ciEnv::current() == this, "sanity");
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_oop_recorder = NULL;
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_debug_info = NULL;
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_dependencies = NULL;
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_failure_reason = NULL;
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_compilable = MethodCompilable_never;
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_break_at_compile = false;
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_compiler_data = NULL;
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#ifndef PRODUCT
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assert(firstEnv, "must be first");
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firstEnv = false;
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#endif /* !PRODUCT */
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_system_dictionary_modification_counter = 0;
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_num_inlined_bytecodes = 0;
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_task = NULL;
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_log = NULL;
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// Temporary buffer for creating symbols and such.
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_name_buffer = NULL;
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_name_buffer_len = 0;
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_arena = arena;
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_factory = new (_arena) ciObjectFactory(_arena, 128);
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// Preload commonly referenced system ciObjects.
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// During VM initialization, these instances have not yet been created.
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// Assertions ensure that these instances are not accessed before
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// their initialization.
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assert(Universe::is_fully_initialized(), "must be");
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oop o = Universe::null_ptr_exception_instance();
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assert(o != NULL, "should have been initialized");
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_NullPointerException_instance = get_object(o)->as_instance();
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o = Universe::arithmetic_exception_instance();
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assert(o != NULL, "should have been initialized");
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_ArithmeticException_instance = get_object(o)->as_instance();
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_ArrayIndexOutOfBoundsException_instance = NULL;
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_ArrayStoreException_instance = NULL;
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_ClassCastException_instance = NULL;
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}
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ciEnv::~ciEnv() {
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CompilerThread* current_thread = CompilerThread::current();
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current_thread->set_env(NULL);
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}
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// ------------------------------------------------------------------
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// helper for lazy exception creation
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ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) {
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VM_ENTRY_MARK;
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if (handle == NULL) {
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// Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
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klassOop k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
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jobject objh = NULL;
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if (!HAS_PENDING_EXCEPTION && k != NULL) {
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oop obj = instanceKlass::cast(k)->allocate_permanent_instance(THREAD);
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if (!HAS_PENDING_EXCEPTION)
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objh = JNIHandles::make_global(obj);
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}
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if (HAS_PENDING_EXCEPTION) {
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CLEAR_PENDING_EXCEPTION;
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} else {
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handle = objh;
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}
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}
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oop obj = JNIHandles::resolve(handle);
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return obj == NULL? NULL: get_object(obj)->as_instance();
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}
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// ------------------------------------------------------------------
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// ciEnv::ArrayIndexOutOfBoundsException_instance, etc.
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ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
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if (_ArrayIndexOutOfBoundsException_instance == NULL) {
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_ArrayIndexOutOfBoundsException_instance
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= get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
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vmSymbolHandles::java_lang_ArrayIndexOutOfBoundsException());
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}
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return _ArrayIndexOutOfBoundsException_instance;
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}
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ciInstance* ciEnv::ArrayStoreException_instance() {
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if (_ArrayStoreException_instance == NULL) {
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_ArrayStoreException_instance
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= get_or_create_exception(_ArrayStoreException_handle,
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vmSymbolHandles::java_lang_ArrayStoreException());
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}
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return _ArrayStoreException_instance;
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}
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ciInstance* ciEnv::ClassCastException_instance() {
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if (_ClassCastException_instance == NULL) {
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_ClassCastException_instance
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= get_or_create_exception(_ClassCastException_handle,
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vmSymbolHandles::java_lang_ClassCastException());
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}
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return _ClassCastException_instance;
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}
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// ------------------------------------------------------------------
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// ciEnv::get_method_from_handle
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ciMethod* ciEnv::get_method_from_handle(jobject method) {
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VM_ENTRY_MARK;
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return get_object(JNIHandles::resolve(method))->as_method();
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}
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// ------------------------------------------------------------------
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// ciEnv::make_array
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ciArray* ciEnv::make_array(GrowableArray<ciObject*>* objects) {
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VM_ENTRY_MARK;
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int length = objects->length();
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objArrayOop a = oopFactory::new_system_objArray(length, THREAD);
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if (HAS_PENDING_EXCEPTION) {
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CLEAR_PENDING_EXCEPTION;
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record_out_of_memory_failure();
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return NULL;
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}
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for (int i = 0; i < length; i++) {
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a->obj_at_put(i, objects->at(i)->get_oop());
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}
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assert(a->is_perm(), "");
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return get_object(a)->as_array();
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}
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// ------------------------------------------------------------------
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// ciEnv::array_element_offset_in_bytes
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int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
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VM_ENTRY_MARK;
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objArrayOop a = (objArrayOop)a_h->get_oop();
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assert(a->is_objArray(), "");
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int length = a->length();
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oop o = o_h->get_oop();
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for (int i = 0; i < length; i++) {
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if (a->obj_at(i) == o) return i;
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}
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return -1;
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}
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// ------------------------------------------------------------------
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// ciEnv::check_klass_accessiblity
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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 ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
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klassOop resolved_klass) {
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if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
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return true;
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}
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if (accessing_klass->is_obj_array()) {
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accessing_klass = accessing_klass->as_obj_array_klass()->base_element_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->klass_part()->oop_is_objArray()) {
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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->klass_part()->oop_is_instance()) {
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return Reflection::verify_class_access(accessing_klass->get_klassOop(),
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resolved_klass,
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true);
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}
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return true;
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}
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// ------------------------------------------------------------------
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// ciEnv::get_klass_by_name_impl
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ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
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ciSymbol* name,
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bool require_local) {
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ASSERT_IN_VM;
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EXCEPTION_CONTEXT;
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// Now we need to check the SystemDictionary
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symbolHandle sym(THREAD, name->get_symbolOop());
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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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sym = oopFactory::new_symbol_handle(sym->as_utf8()+1,
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sym->utf8_length()-2,
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KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
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name = get_object(sym())->as_symbol();
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}
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// Check for prior unloaded klass. The SystemDictionary's answers
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// can vary over time but the compiler needs consistency.
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ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
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if (unloaded_klass != NULL) {
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if (require_local) return NULL;
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return unloaded_klass;
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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 != NULL) {
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loader = Handle(THREAD, accessing_klass->loader());
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domain = Handle(THREAD, accessing_klass->protection_domain());
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}
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// setup up the proper type to return on OOM
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ciKlass* fail_type;
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if (sym->byte_at(0) == '[') {
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fail_type = _unloaded_ciobjarrayklass;
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} else {
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fail_type = _unloaded_ciinstance_klass;
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}
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klassOop found_klass;
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if (!require_local) {
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found_klass =
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SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
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KILL_COMPILE_ON_FATAL_(fail_type));
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} else {
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found_klass =
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SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
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KILL_COMPILE_ON_FATAL_(fail_type));
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}
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if (found_klass != NULL) {
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// Found it. Build a CI handle.
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return get_object(found_klass)->as_klass();
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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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symbolOop elem_sym = oopFactory::new_symbol(sym->as_utf8()+1,
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sym->utf8_length()-1,
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KILL_COMPILE_ON_FATAL_(fail_type));
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// Get element ciKlass recursively.
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ciKlass* elem_klass =
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get_klass_by_name_impl(accessing_klass,
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get_object(elem_sym)->as_symbol(),
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require_local);
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if (elem_klass != NULL && elem_klass->is_loaded()) {
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// Now make an array for it
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return ciObjArrayKlass::make_impl(elem_klass);
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}
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}
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if (require_local) return NULL;
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// Not yet loaded into the VM, or not governed by loader constraints.
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// Make a CI representative for it.
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return get_unloaded_klass(accessing_klass, name);
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}
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// ------------------------------------------------------------------
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// ciEnv::get_klass_by_name
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ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
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ciSymbol* klass_name,
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bool require_local) {
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GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
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klass_name,
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require_local);)
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}
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// ------------------------------------------------------------------
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|
391 |
// ciEnv::get_klass_by_index_impl
|
|
392 |
//
|
|
393 |
// Implementation of get_klass_by_index.
|
|
394 |
ciKlass* ciEnv::get_klass_by_index_impl(ciInstanceKlass* accessor,
|
|
395 |
int index,
|
|
396 |
bool& is_accessible) {
|
|
397 |
assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool");
|
|
398 |
EXCEPTION_CONTEXT;
|
|
399 |
constantPoolHandle cpool(THREAD, accessor->get_instanceKlass()->constants());
|
|
400 |
KlassHandle klass (THREAD, constantPoolOopDesc::klass_at_if_loaded(cpool, index));
|
|
401 |
symbolHandle klass_name;
|
|
402 |
if (klass.is_null()) {
|
|
403 |
// The klass has not been inserted into the constant pool.
|
|
404 |
// Try to look it up by name.
|
|
405 |
{
|
|
406 |
// We have to lock the cpool to keep the oop from being resolved
|
|
407 |
// while we are accessing it.
|
|
408 |
ObjectLocker ol(cpool, THREAD);
|
|
409 |
|
|
410 |
constantTag tag = cpool->tag_at(index);
|
|
411 |
if (tag.is_klass()) {
|
|
412 |
// The klass has been inserted into the constant pool
|
|
413 |
// very recently.
|
|
414 |
klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
|
|
415 |
} else if (tag.is_symbol()) {
|
|
416 |
klass_name = symbolHandle(THREAD, cpool->symbol_at(index));
|
|
417 |
} else {
|
|
418 |
assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
|
|
419 |
klass_name = symbolHandle(THREAD, cpool->unresolved_klass_at(index));
|
|
420 |
}
|
|
421 |
}
|
|
422 |
}
|
|
423 |
|
|
424 |
if (klass.is_null()) {
|
|
425 |
// Not found in constant pool. Use the name to do the lookup.
|
|
426 |
ciKlass* k = get_klass_by_name_impl(accessor,
|
|
427 |
get_object(klass_name())->as_symbol(),
|
|
428 |
false);
|
|
429 |
// Calculate accessibility the hard way.
|
|
430 |
if (!k->is_loaded()) {
|
|
431 |
is_accessible = false;
|
|
432 |
} else if (k->loader() != accessor->loader() &&
|
|
433 |
get_klass_by_name_impl(accessor, k->name(), true) == NULL) {
|
|
434 |
// Loaded only remotely. Not linked yet.
|
|
435 |
is_accessible = false;
|
|
436 |
} else {
|
|
437 |
// Linked locally, and we must also check public/private, etc.
|
|
438 |
is_accessible = check_klass_accessibility(accessor, k->get_klassOop());
|
|
439 |
}
|
|
440 |
return k;
|
|
441 |
}
|
|
442 |
|
|
443 |
// Check for prior unloaded klass. The SystemDictionary's answers
|
|
444 |
// can vary over time but the compiler needs consistency.
|
|
445 |
ciSymbol* name = get_object(klass()->klass_part()->name())->as_symbol();
|
|
446 |
ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
|
|
447 |
if (unloaded_klass != NULL) {
|
|
448 |
is_accessible = false;
|
|
449 |
return unloaded_klass;
|
|
450 |
}
|
|
451 |
|
|
452 |
// It is known to be accessible, since it was found in the constant pool.
|
|
453 |
is_accessible = true;
|
|
454 |
return get_object(klass())->as_klass();
|
|
455 |
}
|
|
456 |
|
|
457 |
// ------------------------------------------------------------------
|
|
458 |
// ciEnv::get_klass_by_index
|
|
459 |
//
|
|
460 |
// Get a klass from the constant pool.
|
|
461 |
ciKlass* ciEnv::get_klass_by_index(ciInstanceKlass* accessor,
|
|
462 |
int index,
|
|
463 |
bool& is_accessible) {
|
|
464 |
GUARDED_VM_ENTRY(return get_klass_by_index_impl(accessor, index, is_accessible);)
|
|
465 |
}
|
|
466 |
|
|
467 |
// ------------------------------------------------------------------
|
|
468 |
// ciEnv::get_constant_by_index_impl
|
|
469 |
//
|
|
470 |
// Implementation of get_constant_by_index().
|
|
471 |
ciConstant ciEnv::get_constant_by_index_impl(ciInstanceKlass* accessor,
|
|
472 |
int index) {
|
|
473 |
EXCEPTION_CONTEXT;
|
|
474 |
instanceKlass* ik_accessor = accessor->get_instanceKlass();
|
|
475 |
assert(ik_accessor->is_linked(), "must be linked before accessing constant pool");
|
|
476 |
constantPoolOop cpool = ik_accessor->constants();
|
|
477 |
constantTag tag = cpool->tag_at(index);
|
|
478 |
if (tag.is_int()) {
|
|
479 |
return ciConstant(T_INT, (jint)cpool->int_at(index));
|
|
480 |
} else if (tag.is_long()) {
|
|
481 |
return ciConstant((jlong)cpool->long_at(index));
|
|
482 |
} else if (tag.is_float()) {
|
|
483 |
return ciConstant((jfloat)cpool->float_at(index));
|
|
484 |
} else if (tag.is_double()) {
|
|
485 |
return ciConstant((jdouble)cpool->double_at(index));
|
|
486 |
} else if (tag.is_string() || tag.is_unresolved_string()) {
|
|
487 |
oop string = cpool->string_at(index, THREAD);
|
|
488 |
if (HAS_PENDING_EXCEPTION) {
|
|
489 |
CLEAR_PENDING_EXCEPTION;
|
|
490 |
record_out_of_memory_failure();
|
|
491 |
return ciConstant();
|
|
492 |
}
|
|
493 |
ciObject* constant = get_object(string);
|
|
494 |
assert (constant->is_instance(), "must be an instance, or not? ");
|
|
495 |
return ciConstant(T_OBJECT, constant);
|
|
496 |
} else if (tag.is_klass() || tag.is_unresolved_klass()) {
|
|
497 |
// 4881222: allow ldc to take a class type
|
|
498 |
bool ignore;
|
|
499 |
ciKlass* klass = get_klass_by_index_impl(accessor, index, ignore);
|
|
500 |
if (HAS_PENDING_EXCEPTION) {
|
|
501 |
CLEAR_PENDING_EXCEPTION;
|
|
502 |
record_out_of_memory_failure();
|
|
503 |
return ciConstant();
|
|
504 |
}
|
|
505 |
assert (klass->is_instance_klass() || klass->is_array_klass(),
|
|
506 |
"must be an instance or array klass ");
|
|
507 |
return ciConstant(T_OBJECT, klass);
|
|
508 |
} else {
|
|
509 |
ShouldNotReachHere();
|
|
510 |
return ciConstant();
|
|
511 |
}
|
|
512 |
}
|
|
513 |
|
|
514 |
// ------------------------------------------------------------------
|
|
515 |
// ciEnv::is_unresolved_string_impl
|
|
516 |
//
|
|
517 |
// Implementation of is_unresolved_string().
|
|
518 |
bool ciEnv::is_unresolved_string_impl(instanceKlass* accessor, int index) const {
|
|
519 |
EXCEPTION_CONTEXT;
|
|
520 |
assert(accessor->is_linked(), "must be linked before accessing constant pool");
|
|
521 |
constantPoolOop cpool = accessor->constants();
|
|
522 |
constantTag tag = cpool->tag_at(index);
|
|
523 |
return tag.is_unresolved_string();
|
|
524 |
}
|
|
525 |
|
|
526 |
// ------------------------------------------------------------------
|
|
527 |
// ciEnv::is_unresolved_klass_impl
|
|
528 |
//
|
|
529 |
// Implementation of is_unresolved_klass().
|
|
530 |
bool ciEnv::is_unresolved_klass_impl(instanceKlass* accessor, int index) const {
|
|
531 |
EXCEPTION_CONTEXT;
|
|
532 |
assert(accessor->is_linked(), "must be linked before accessing constant pool");
|
|
533 |
constantPoolOop cpool = accessor->constants();
|
|
534 |
constantTag tag = cpool->tag_at(index);
|
|
535 |
return tag.is_unresolved_klass();
|
|
536 |
}
|
|
537 |
|
|
538 |
// ------------------------------------------------------------------
|
|
539 |
// ciEnv::get_constant_by_index
|
|
540 |
//
|
|
541 |
// Pull a constant out of the constant pool. How appropriate.
|
|
542 |
//
|
|
543 |
// Implementation note: this query is currently in no way cached.
|
|
544 |
ciConstant ciEnv::get_constant_by_index(ciInstanceKlass* accessor,
|
|
545 |
int index) {
|
|
546 |
GUARDED_VM_ENTRY(return get_constant_by_index_impl(accessor, index); )
|
|
547 |
}
|
|
548 |
|
|
549 |
// ------------------------------------------------------------------
|
|
550 |
// ciEnv::is_unresolved_string
|
|
551 |
//
|
|
552 |
// Check constant pool
|
|
553 |
//
|
|
554 |
// Implementation note: this query is currently in no way cached.
|
|
555 |
bool ciEnv::is_unresolved_string(ciInstanceKlass* accessor,
|
|
556 |
int index) const {
|
|
557 |
GUARDED_VM_ENTRY(return is_unresolved_string_impl(accessor->get_instanceKlass(), index); )
|
|
558 |
}
|
|
559 |
|
|
560 |
// ------------------------------------------------------------------
|
|
561 |
// ciEnv::is_unresolved_klass
|
|
562 |
//
|
|
563 |
// Check constant pool
|
|
564 |
//
|
|
565 |
// Implementation note: this query is currently in no way cached.
|
|
566 |
bool ciEnv::is_unresolved_klass(ciInstanceKlass* accessor,
|
|
567 |
int index) const {
|
|
568 |
GUARDED_VM_ENTRY(return is_unresolved_klass_impl(accessor->get_instanceKlass(), index); )
|
|
569 |
}
|
|
570 |
|
|
571 |
// ------------------------------------------------------------------
|
|
572 |
// ciEnv::get_field_by_index_impl
|
|
573 |
//
|
|
574 |
// Implementation of get_field_by_index.
|
|
575 |
//
|
|
576 |
// Implementation note: the results of field lookups are cached
|
|
577 |
// in the accessor klass.
|
|
578 |
ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
|
|
579 |
int index) {
|
|
580 |
ciConstantPoolCache* cache = accessor->field_cache();
|
|
581 |
if (cache == NULL) {
|
|
582 |
ciField* field = new (arena()) ciField(accessor, index);
|
|
583 |
return field;
|
|
584 |
} else {
|
|
585 |
ciField* field = (ciField*)cache->get(index);
|
|
586 |
if (field == NULL) {
|
|
587 |
field = new (arena()) ciField(accessor, index);
|
|
588 |
cache->insert(index, field);
|
|
589 |
}
|
|
590 |
return field;
|
|
591 |
}
|
|
592 |
}
|
|
593 |
|
|
594 |
// ------------------------------------------------------------------
|
|
595 |
// ciEnv::get_field_by_index
|
|
596 |
//
|
|
597 |
// Get a field by index from a klass's constant pool.
|
|
598 |
ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
|
|
599 |
int index) {
|
|
600 |
GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
|
|
601 |
}
|
|
602 |
|
|
603 |
// ------------------------------------------------------------------
|
|
604 |
// ciEnv::lookup_method
|
|
605 |
//
|
|
606 |
// Perform an appropriate method lookup based on accessor, holder,
|
|
607 |
// name, signature, and bytecode.
|
|
608 |
methodOop ciEnv::lookup_method(instanceKlass* accessor,
|
|
609 |
instanceKlass* holder,
|
|
610 |
symbolOop name,
|
|
611 |
symbolOop sig,
|
|
612 |
Bytecodes::Code bc) {
|
|
613 |
EXCEPTION_CONTEXT;
|
|
614 |
KlassHandle h_accessor(THREAD, accessor);
|
|
615 |
KlassHandle h_holder(THREAD, holder);
|
|
616 |
symbolHandle h_name(THREAD, name);
|
|
617 |
symbolHandle h_sig(THREAD, sig);
|
|
618 |
LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
|
|
619 |
methodHandle dest_method;
|
|
620 |
switch (bc) {
|
|
621 |
case Bytecodes::_invokestatic:
|
|
622 |
dest_method =
|
|
623 |
LinkResolver::resolve_static_call_or_null(h_holder, h_name, h_sig, h_accessor);
|
|
624 |
break;
|
|
625 |
case Bytecodes::_invokespecial:
|
|
626 |
dest_method =
|
|
627 |
LinkResolver::resolve_special_call_or_null(h_holder, h_name, h_sig, h_accessor);
|
|
628 |
break;
|
|
629 |
case Bytecodes::_invokeinterface:
|
|
630 |
dest_method =
|
|
631 |
LinkResolver::linktime_resolve_interface_method_or_null(h_holder, h_name, h_sig,
|
|
632 |
h_accessor, true);
|
|
633 |
break;
|
|
634 |
case Bytecodes::_invokevirtual:
|
|
635 |
dest_method =
|
|
636 |
LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, h_name, h_sig,
|
|
637 |
h_accessor, true);
|
|
638 |
break;
|
|
639 |
default: ShouldNotReachHere();
|
|
640 |
}
|
|
641 |
|
|
642 |
return dest_method();
|
|
643 |
}
|
|
644 |
|
|
645 |
|
|
646 |
// ------------------------------------------------------------------
|
|
647 |
// ciEnv::get_method_by_index_impl
|
|
648 |
ciMethod* ciEnv::get_method_by_index_impl(ciInstanceKlass* accessor,
|
|
649 |
int index, Bytecodes::Code bc) {
|
|
650 |
// Get the method's declared holder.
|
|
651 |
|
|
652 |
assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool");
|
|
653 |
constantPoolHandle cpool = accessor->get_instanceKlass()->constants();
|
|
654 |
int holder_index = cpool->klass_ref_index_at(index);
|
|
655 |
bool holder_is_accessible;
|
|
656 |
ciKlass* holder = get_klass_by_index_impl(accessor, holder_index, holder_is_accessible);
|
|
657 |
ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
|
|
658 |
|
|
659 |
// Get the method's name and signature.
|
|
660 |
int nt_index = cpool->name_and_type_ref_index_at(index);
|
|
661 |
int sig_index = cpool->signature_ref_index_at(nt_index);
|
|
662 |
symbolOop name_sym = cpool->name_ref_at(index);
|
|
663 |
symbolOop sig_sym = cpool->symbol_at(sig_index);
|
|
664 |
|
|
665 |
if (holder_is_accessible) { // Our declared holder is loaded.
|
|
666 |
instanceKlass* lookup = declared_holder->get_instanceKlass();
|
|
667 |
methodOop m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
|
|
668 |
if (m != NULL) {
|
|
669 |
// We found the method.
|
|
670 |
return get_object(m)->as_method();
|
|
671 |
}
|
|
672 |
}
|
|
673 |
|
|
674 |
// Either the declared holder was not loaded, or the method could
|
|
675 |
// not be found. Create a dummy ciMethod to represent the failed
|
|
676 |
// lookup.
|
|
677 |
|
|
678 |
return get_unloaded_method(declared_holder,
|
|
679 |
get_object(name_sym)->as_symbol(),
|
|
680 |
get_object(sig_sym)->as_symbol());
|
|
681 |
}
|
|
682 |
|
|
683 |
|
|
684 |
// ------------------------------------------------------------------
|
|
685 |
// ciEnv::get_instance_klass_for_declared_method_holder
|
|
686 |
ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
|
|
687 |
// For the case of <array>.clone(), the method holder can be a ciArrayKlass
|
|
688 |
// instead of a ciInstanceKlass. For that case simply pretend that the
|
|
689 |
// declared holder is Object.clone since that's where the call will bottom out.
|
|
690 |
// A more correct fix would trickle out through many interfaces in CI,
|
|
691 |
// requiring ciInstanceKlass* to become ciKlass* and many more places would
|
|
692 |
// require checks to make sure the expected type was found. Given that this
|
|
693 |
// only occurs for clone() the more extensive fix seems like overkill so
|
|
694 |
// instead we simply smear the array type into Object.
|
|
695 |
if (method_holder->is_instance_klass()) {
|
|
696 |
return method_holder->as_instance_klass();
|
|
697 |
} else if (method_holder->is_array_klass()) {
|
|
698 |
return current()->Object_klass();
|
|
699 |
} else {
|
|
700 |
ShouldNotReachHere();
|
|
701 |
}
|
|
702 |
return NULL;
|
|
703 |
}
|
|
704 |
|
|
705 |
|
|
706 |
|
|
707 |
|
|
708 |
// ------------------------------------------------------------------
|
|
709 |
// ciEnv::get_method_by_index
|
|
710 |
ciMethod* ciEnv::get_method_by_index(ciInstanceKlass* accessor,
|
|
711 |
int index, Bytecodes::Code bc) {
|
|
712 |
GUARDED_VM_ENTRY(return get_method_by_index_impl(accessor, index, bc);)
|
|
713 |
}
|
|
714 |
|
|
715 |
// ------------------------------------------------------------------
|
|
716 |
// ciEnv::name_buffer
|
|
717 |
char *ciEnv::name_buffer(int req_len) {
|
|
718 |
if (_name_buffer_len < req_len) {
|
|
719 |
if (_name_buffer == NULL) {
|
|
720 |
_name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
|
|
721 |
_name_buffer_len = req_len;
|
|
722 |
} else {
|
|
723 |
_name_buffer =
|
|
724 |
(char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
|
|
725 |
_name_buffer_len = req_len;
|
|
726 |
}
|
|
727 |
}
|
|
728 |
return _name_buffer;
|
|
729 |
}
|
|
730 |
|
|
731 |
// ------------------------------------------------------------------
|
|
732 |
// ciEnv::is_in_vm
|
|
733 |
bool ciEnv::is_in_vm() {
|
|
734 |
return JavaThread::current()->thread_state() == _thread_in_vm;
|
|
735 |
}
|
|
736 |
|
|
737 |
bool ciEnv::system_dictionary_modification_counter_changed() {
|
|
738 |
return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
|
|
739 |
}
|
|
740 |
|
|
741 |
// ------------------------------------------------------------------
|
|
742 |
// ciEnv::check_for_system_dictionary_modification
|
|
743 |
// Check for changes to the system dictionary during compilation
|
|
744 |
// class loads, evolution, breakpoints
|
|
745 |
void ciEnv::check_for_system_dictionary_modification(ciMethod* target) {
|
|
746 |
if (failing()) return; // no need for further checks
|
|
747 |
|
|
748 |
// Dependencies must be checked when the system dictionary changes.
|
|
749 |
// If logging is enabled all violated dependences will be recorded in
|
|
750 |
// the log. In debug mode check dependencies even if the system
|
|
751 |
// dictionary hasn't changed to verify that no invalid dependencies
|
|
752 |
// were inserted. Any violated dependences in this case are dumped to
|
|
753 |
// the tty.
|
|
754 |
|
|
755 |
bool counter_changed = system_dictionary_modification_counter_changed();
|
|
756 |
bool test_deps = counter_changed;
|
|
757 |
DEBUG_ONLY(test_deps = true);
|
|
758 |
if (!test_deps) return;
|
|
759 |
|
|
760 |
bool print_failures = false;
|
|
761 |
DEBUG_ONLY(print_failures = !counter_changed);
|
|
762 |
|
|
763 |
bool keep_going = (print_failures || xtty != NULL);
|
|
764 |
|
|
765 |
int violated = 0;
|
|
766 |
|
|
767 |
for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
|
|
768 |
klassOop witness = deps.check_dependency();
|
|
769 |
if (witness != NULL) {
|
|
770 |
++violated;
|
|
771 |
if (print_failures) deps.print_dependency(witness, /*verbose=*/ true);
|
|
772 |
// If there's no log and we're not sanity-checking, we're done.
|
|
773 |
if (!keep_going) break;
|
|
774 |
}
|
|
775 |
}
|
|
776 |
|
|
777 |
if (violated != 0) {
|
|
778 |
assert(counter_changed, "failed dependencies, but counter didn't change");
|
|
779 |
record_failure("concurrent class loading");
|
|
780 |
}
|
|
781 |
}
|
|
782 |
|
|
783 |
// ------------------------------------------------------------------
|
|
784 |
// ciEnv::register_method
|
|
785 |
void ciEnv::register_method(ciMethod* target,
|
|
786 |
int entry_bci,
|
|
787 |
CodeOffsets* offsets,
|
|
788 |
int orig_pc_offset,
|
|
789 |
CodeBuffer* code_buffer,
|
|
790 |
int frame_words,
|
|
791 |
OopMapSet* oop_map_set,
|
|
792 |
ExceptionHandlerTable* handler_table,
|
|
793 |
ImplicitExceptionTable* inc_table,
|
|
794 |
AbstractCompiler* compiler,
|
|
795 |
int comp_level,
|
|
796 |
bool has_debug_info,
|
|
797 |
bool has_unsafe_access) {
|
|
798 |
VM_ENTRY_MARK;
|
|
799 |
nmethod* nm = NULL;
|
|
800 |
{
|
|
801 |
// To prevent compile queue updates.
|
|
802 |
MutexLocker locker(MethodCompileQueue_lock, THREAD);
|
|
803 |
|
|
804 |
// Prevent SystemDictionary::add_to_hierarchy from running
|
|
805 |
// and invalidating our dependencies until we install this method.
|
|
806 |
MutexLocker ml(Compile_lock);
|
|
807 |
|
|
808 |
if (log() != NULL) {
|
|
809 |
// Log the dependencies which this compilation declares.
|
|
810 |
dependencies()->log_all_dependencies();
|
|
811 |
}
|
|
812 |
|
|
813 |
// Encode the dependencies now, so we can check them right away.
|
|
814 |
dependencies()->encode_content_bytes();
|
|
815 |
|
|
816 |
// Check for {class loads, evolution, breakpoints} during compilation
|
|
817 |
check_for_system_dictionary_modification(target);
|
|
818 |
|
|
819 |
methodHandle method(THREAD, target->get_methodOop());
|
|
820 |
|
|
821 |
if (failing()) {
|
|
822 |
// While not a true deoptimization, it is a preemptive decompile.
|
|
823 |
methodDataOop mdo = method()->method_data();
|
|
824 |
if (mdo != NULL) {
|
|
825 |
mdo->inc_decompile_count();
|
|
826 |
}
|
|
827 |
|
|
828 |
// All buffers in the CodeBuffer are allocated in the CodeCache.
|
|
829 |
// If the code buffer is created on each compile attempt
|
|
830 |
// as in C2, then it must be freed.
|
|
831 |
code_buffer->free_blob();
|
|
832 |
return;
|
|
833 |
}
|
|
834 |
|
|
835 |
assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
|
|
836 |
assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
|
|
837 |
|
|
838 |
nm = nmethod::new_nmethod(method,
|
|
839 |
compile_id(),
|
|
840 |
entry_bci,
|
|
841 |
offsets,
|
|
842 |
orig_pc_offset,
|
|
843 |
debug_info(), dependencies(), code_buffer,
|
|
844 |
frame_words, oop_map_set,
|
|
845 |
handler_table, inc_table,
|
|
846 |
compiler, comp_level);
|
|
847 |
|
|
848 |
// Free codeBlobs
|
|
849 |
code_buffer->free_blob();
|
|
850 |
|
|
851 |
// stress test 6243940 by immediately making the method
|
|
852 |
// non-entrant behind the system's back. This has serious
|
|
853 |
// side effects on the code cache and is not meant for
|
|
854 |
// general stress testing
|
|
855 |
if (nm != NULL && StressNonEntrant) {
|
|
856 |
MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
|
|
857 |
NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(),
|
|
858 |
SharedRuntime::get_handle_wrong_method_stub());
|
|
859 |
}
|
|
860 |
|
|
861 |
if (nm == NULL) {
|
|
862 |
// The CodeCache is full. Print out warning and disable compilation.
|
|
863 |
record_failure("code cache is full");
|
|
864 |
UseInterpreter = true;
|
|
865 |
if (UseCompiler || AlwaysCompileLoopMethods ) {
|
|
866 |
#ifndef PRODUCT
|
|
867 |
warning("CodeCache is full. Compiler has been disabled");
|
|
868 |
if (CompileTheWorld || ExitOnFullCodeCache) {
|
|
869 |
before_exit(JavaThread::current());
|
|
870 |
exit_globals(); // will delete tty
|
|
871 |
vm_direct_exit(CompileTheWorld ? 0 : 1);
|
|
872 |
}
|
|
873 |
#endif
|
|
874 |
UseCompiler = false;
|
|
875 |
AlwaysCompileLoopMethods = false;
|
|
876 |
}
|
|
877 |
} else {
|
|
878 |
NOT_PRODUCT(nm->set_has_debug_info(has_debug_info); )
|
|
879 |
nm->set_has_unsafe_access(has_unsafe_access);
|
|
880 |
|
|
881 |
// Record successful registration.
|
|
882 |
// (Put nm into the task handle *before* publishing to the Java heap.)
|
|
883 |
if (task() != NULL) task()->set_code(nm);
|
|
884 |
|
|
885 |
if (entry_bci == InvocationEntryBci) {
|
|
886 |
#ifdef TIERED
|
|
887 |
// If there is an old version we're done with it
|
|
888 |
nmethod* old = method->code();
|
|
889 |
if (TraceMethodReplacement && old != NULL) {
|
|
890 |
ResourceMark rm;
|
|
891 |
char *method_name = method->name_and_sig_as_C_string();
|
|
892 |
tty->print_cr("Replacing method %s", method_name);
|
|
893 |
}
|
|
894 |
if (old != NULL ) {
|
|
895 |
old->make_not_entrant();
|
|
896 |
}
|
|
897 |
#endif // TIERED
|
|
898 |
if (TraceNMethodInstalls ) {
|
|
899 |
ResourceMark rm;
|
|
900 |
char *method_name = method->name_and_sig_as_C_string();
|
|
901 |
ttyLocker ttyl;
|
|
902 |
tty->print_cr("Installing method (%d) %s ",
|
|
903 |
comp_level,
|
|
904 |
method_name);
|
|
905 |
}
|
|
906 |
// Allow the code to be executed
|
|
907 |
method->set_code(method, nm);
|
|
908 |
} else {
|
|
909 |
if (TraceNMethodInstalls ) {
|
|
910 |
ResourceMark rm;
|
|
911 |
char *method_name = method->name_and_sig_as_C_string();
|
|
912 |
ttyLocker ttyl;
|
|
913 |
tty->print_cr("Installing osr method (%d) %s @ %d",
|
|
914 |
comp_level,
|
|
915 |
method_name,
|
|
916 |
entry_bci);
|
|
917 |
}
|
|
918 |
instanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
|
|
919 |
|
|
920 |
}
|
|
921 |
}
|
|
922 |
}
|
|
923 |
// JVMTI -- compiled method notification (must be done outside lock)
|
|
924 |
if (nm != NULL) {
|
|
925 |
nm->post_compiled_method_load_event();
|
|
926 |
}
|
|
927 |
|
|
928 |
}
|
|
929 |
|
|
930 |
|
|
931 |
// ------------------------------------------------------------------
|
|
932 |
// ciEnv::find_system_klass
|
|
933 |
ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
|
|
934 |
VM_ENTRY_MARK;
|
|
935 |
return get_klass_by_name_impl(NULL, klass_name, false);
|
|
936 |
}
|
|
937 |
|
|
938 |
// ------------------------------------------------------------------
|
|
939 |
// ciEnv::comp_level
|
|
940 |
int ciEnv::comp_level() {
|
|
941 |
if (task() == NULL) return CompLevel_full_optimization;
|
|
942 |
return task()->comp_level();
|
|
943 |
}
|
|
944 |
|
|
945 |
// ------------------------------------------------------------------
|
|
946 |
// ciEnv::compile_id
|
|
947 |
uint ciEnv::compile_id() {
|
|
948 |
if (task() == NULL) return 0;
|
|
949 |
return task()->compile_id();
|
|
950 |
}
|
|
951 |
|
|
952 |
// ------------------------------------------------------------------
|
|
953 |
// ciEnv::notice_inlined_method()
|
|
954 |
void ciEnv::notice_inlined_method(ciMethod* method) {
|
|
955 |
_num_inlined_bytecodes += method->code_size();
|
|
956 |
}
|
|
957 |
|
|
958 |
// ------------------------------------------------------------------
|
|
959 |
// ciEnv::num_inlined_bytecodes()
|
|
960 |
int ciEnv::num_inlined_bytecodes() const {
|
|
961 |
return _num_inlined_bytecodes;
|
|
962 |
}
|
|
963 |
|
|
964 |
// ------------------------------------------------------------------
|
|
965 |
// ciEnv::record_failure()
|
|
966 |
void ciEnv::record_failure(const char* reason) {
|
|
967 |
if (log() != NULL) {
|
|
968 |
log()->elem("failure reason='%s'", reason);
|
|
969 |
}
|
|
970 |
if (_failure_reason == NULL) {
|
|
971 |
// Record the first failure reason.
|
|
972 |
_failure_reason = reason;
|
|
973 |
}
|
|
974 |
}
|
|
975 |
|
|
976 |
// ------------------------------------------------------------------
|
|
977 |
// ciEnv::record_method_not_compilable()
|
|
978 |
void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
|
|
979 |
int new_compilable =
|
|
980 |
all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
|
|
981 |
|
|
982 |
// Only note transitions to a worse state
|
|
983 |
if (new_compilable > _compilable) {
|
|
984 |
if (log() != NULL) {
|
|
985 |
if (all_tiers) {
|
|
986 |
log()->elem("method_not_compilable");
|
|
987 |
} else {
|
|
988 |
log()->elem("method_not_compilable_at_tier");
|
|
989 |
}
|
|
990 |
}
|
|
991 |
_compilable = new_compilable;
|
|
992 |
|
|
993 |
// Reset failure reason; this one is more important.
|
|
994 |
_failure_reason = NULL;
|
|
995 |
record_failure(reason);
|
|
996 |
}
|
|
997 |
}
|
|
998 |
|
|
999 |
// ------------------------------------------------------------------
|
|
1000 |
// ciEnv::record_out_of_memory_failure()
|
|
1001 |
void ciEnv::record_out_of_memory_failure() {
|
|
1002 |
// If memory is low, we stop compiling methods.
|
|
1003 |
record_method_not_compilable("out of memory");
|
|
1004 |
}
|