--- /dev/null 2015-09-16 15:21:28.000000000 -0700 +++ new/src/share/vm/jvmci/jvmciEnv.hpp 2015-09-16 15:21:28.000000000 -0700 @@ -0,0 +1,172 @@ +/* + * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef SHARE_VM_JVMCI_JVMCIENV_HPP +#define SHARE_VM_JVMCI_JVMCIENV_HPP + +#include "classfile/systemDictionary.hpp" +#include "code/debugInfoRec.hpp" +#include "code/dependencies.hpp" +#include "code/exceptionHandlerTable.hpp" +#include "compiler/oopMap.hpp" +#include "runtime/thread.hpp" + +class CompileTask; + +// Bring the JVMCI compiler thread into the VM state. +#define JVMCI_VM_ENTRY_MARK \ + JavaThread* thread = JavaThread::current(); \ + ThreadInVMfromNative __tiv(thread); \ + ResetNoHandleMark rnhm; \ + HandleMarkCleaner __hm(thread); \ + Thread* THREAD = thread; \ + debug_only(VMNativeEntryWrapper __vew;) + +#define JVMCI_EXCEPTION_CONTEXT \ + JavaThread* thread=JavaThread::current(); \ + Thread* THREAD = thread; + +// +// This class is the top level broker for requests from the compiler +// to the VM. +class JVMCIEnv : StackObj { + CI_PACKAGE_ACCESS_TO + + friend class CompileBroker; + friend class Dependencies; // for get_object, during logging + +public: + + enum CodeInstallResult { + ok, + dependencies_failed, + dependencies_invalid, + cache_full, + code_too_large + }; + + // Look up a klass by name from a particular class loader (the accessor's). + // If require_local, result must be defined in that class loader, or NULL. + // If !require_local, a result from remote class loader may be reported, + // if sufficient class loader constraints exist such that initiating + // a class loading request from the given loader is bound to return + // the class defined in the remote loader (or throw an error). + // + // Return an unloaded klass if !require_local and no class at all is found. + // + // The CI treats a klass as loaded if it is consistently defined in + // another loader, even if it hasn't yet been loaded in all loaders + // that could potentially see it via delegation. + static KlassHandle get_klass_by_name(KlassHandle& accessing_klass, + Symbol* klass_name, + bool require_local); + + // Constant pool access. + static KlassHandle get_klass_by_index(constantPoolHandle& cpool, + int klass_index, + bool& is_accessible, + KlassHandle& loading_klass); + static void get_field_by_index(instanceKlassHandle& loading_klass, fieldDescriptor& fd, + int field_index); + static methodHandle get_method_by_index(constantPoolHandle& cpool, + int method_index, Bytecodes::Code bc, + instanceKlassHandle& loading_klass); + + JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter); + +private: + CompileTask* _task; + int _system_dictionary_modification_counter; + + // Cache JVMTI state + bool _jvmti_can_hotswap_or_post_breakpoint; + bool _jvmti_can_access_local_variables; + bool _jvmti_can_post_on_exceptions; + + // Implementation methods for loading and constant pool access. + static KlassHandle get_klass_by_name_impl(KlassHandle& accessing_klass, + constantPoolHandle& cpool, + Symbol* klass_name, + bool require_local); + static KlassHandle get_klass_by_index_impl(constantPoolHandle& cpool, + int klass_index, + bool& is_accessible, + KlassHandle& loading_klass); + static void get_field_by_index_impl(instanceKlassHandle& loading_klass, fieldDescriptor& fd, + int field_index); + static methodHandle get_method_by_index_impl(constantPoolHandle& cpool, + int method_index, Bytecodes::Code bc, + instanceKlassHandle& loading_klass); + + // Helper methods + static bool check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass); + static methodHandle lookup_method(instanceKlassHandle& accessor, + instanceKlassHandle& holder, + Symbol* name, + Symbol* sig, + Bytecodes::Code bc); + + private: + + // Is this thread currently in the VM state? + static bool is_in_vm(); + + // Helper routine for determining the validity of a compilation + // with respect to concurrent class loading. + static JVMCIEnv::CodeInstallResult check_for_system_dictionary_modification(Dependencies* target, Handle compiled_code, + JVMCIEnv* env, char** failure_detail); + +public: + CompileTask* task() { return _task; } + + // Register the result of a compilation. + static JVMCIEnv::CodeInstallResult register_method( + methodHandle& target, + nmethod*& nm, + int entry_bci, + CodeOffsets* offsets, + int orig_pc_offset, + CodeBuffer* code_buffer, + int frame_words, + OopMapSet* oop_map_set, + ExceptionHandlerTable* handler_table, + AbstractCompiler* compiler, + DebugInformationRecorder* debug_info, + Dependencies* dependencies, + JVMCIEnv* env, + int compile_id, + bool has_unsafe_access, + bool has_wide_vector, + Handle installed_code, + Handle compiled_code, + Handle speculation_log); + + // converts the Klass* representing the holder of a method into a + // InstanceKlass*. This is needed since the holder of a method in + // the bytecodes could be an array type. Basically this converts + // array types into java/lang/Object and other types stay as they are. + static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle& klass); +}; + +#endif // SHARE_VM_JVMCI_JVMCIENV_HPP