/* * Copyright (c) 1999, 2019, 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 JVMCIVMStructs; 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 Klass* get_klass_by_name(Klass* accessing_klass, Symbol* klass_name, bool require_local); // Constant pool access. static Klass* get_klass_by_index(const constantPoolHandle& cpool, int klass_index, bool& is_accessible, Klass* loading_klass); static void get_field_by_index(InstanceKlass* loading_klass, fieldDescriptor& fd, int field_index); static methodHandle get_method_by_index(const constantPoolHandle& cpool, int method_index, Bytecodes::Code bc, InstanceKlass* loading_klass); JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter); private: CompileTask* _task; int _system_dictionary_modification_counter; // Compilation result values const char* _failure_reason; bool _retryable; // Cache JVMTI state. Defined as bytes so that reading them from Java // via Unsafe is well defined (the C++ type for bool is implementation // defined and may not be the same as a Java boolean). jbyte _jvmti_can_hotswap_or_post_breakpoint; jbyte _jvmti_can_access_local_variables; jbyte _jvmti_can_post_on_exceptions; jbyte _jvmti_can_pop_frame; // Implementation methods for loading and constant pool access. static Klass* get_klass_by_name_impl(Klass* accessing_klass, const constantPoolHandle& cpool, Symbol* klass_name, bool require_local); static Klass* get_klass_by_index_impl(const constantPoolHandle& cpool, int klass_index, bool& is_accessible, Klass* loading_klass); static void get_field_by_index_impl(InstanceKlass* loading_klass, fieldDescriptor& fd, int field_index); static methodHandle get_method_by_index_impl(const constantPoolHandle& cpool, int method_index, Bytecodes::Code bc, InstanceKlass* loading_klass); // Helper methods static bool check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass); static methodHandle lookup_method(InstanceKlass* accessor, Klass* holder, Symbol* name, Symbol* sig, Bytecodes::Code bc, constantTag tag); 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 validate_compile_task_dependencies(Dependencies* target, Handle compiled_code, JVMCIEnv* env, char** failure_detail); public: CompileTask* task() { return _task; } bool jvmti_state_changed() const; bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint != 0; } bool jvmti_can_access_local_variables() const { return _jvmti_can_access_local_variables != 0; } bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions != 0; } bool jvmti_can_pop_frame() const { return _jvmti_can_pop_frame != 0; } const char* failure_reason() { return _failure_reason; } bool retryable() { return _retryable; } void set_failure(const char* reason, bool retryable) { _failure_reason = reason; _retryable = retryable; } // Register the result of a compilation. static JVMCIEnv::CodeInstallResult register_method( const 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 InstanceKlass* get_instance_klass_for_declared_method_holder(Klass* klass); }; #endif // SHARE_VM_JVMCI_JVMCIENV_HPP