1 /* 2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_JVMCI_JVMCIENV_HPP 26 #define SHARE_VM_JVMCI_JVMCIENV_HPP 27 28 #include "classfile/systemDictionary.hpp" 29 #include "code/debugInfoRec.hpp" 30 #include "code/dependencies.hpp" 31 #include "code/exceptionHandlerTable.hpp" 32 #include "compiler/oopMap.hpp" 33 #include "runtime/thread.hpp" 34 35 class CompileTask; 36 37 // Bring the JVMCI compiler thread into the VM state. 38 #define JVMCI_VM_ENTRY_MARK \ 39 JavaThread* thread = JavaThread::current(); \ 40 ThreadInVMfromNative __tiv(thread); \ 41 ResetNoHandleMark rnhm; \ 42 HandleMarkCleaner __hm(thread); \ 43 Thread* THREAD = thread; \ 44 debug_only(VMNativeEntryWrapper __vew;) 45 46 #define JVMCI_EXCEPTION_CONTEXT \ 47 JavaThread* thread=JavaThread::current(); \ 48 Thread* THREAD = thread; 49 50 // 51 // This class is the top level broker for requests from the compiler 52 // to the VM. 53 class JVMCIEnv : StackObj { 54 CI_PACKAGE_ACCESS_TO 55 56 friend class JVMCIVMStructs; 57 friend class CompileBroker; 58 friend class Dependencies; // for get_object, during logging 59 60 public: 61 62 enum CodeInstallResult { 63 ok, 64 dependencies_failed, 65 dependencies_invalid, 66 cache_full, 67 code_too_large 68 }; 69 70 // Look up a klass by name from a particular class loader (the accessor's). 71 // If require_local, result must be defined in that class loader, or NULL. 72 // If !require_local, a result from remote class loader may be reported, 73 // if sufficient class loader constraints exist such that initiating 74 // a class loading request from the given loader is bound to return 75 // the class defined in the remote loader (or throw an error). 76 // 77 // Return an unloaded klass if !require_local and no class at all is found. 78 // 79 // The CI treats a klass as loaded if it is consistently defined in 80 // another loader, even if it hasn't yet been loaded in all loaders 81 // that could potentially see it via delegation. 82 static Klass* get_klass_by_name(Klass* accessing_klass, Symbol* klass_name, bool require_local); 83 84 // Constant pool access. 85 static Klass* get_klass_by_index(const constantPoolHandle& cpool, 86 int klass_index, 87 bool& is_accessible, 88 Klass* loading_klass); 89 static void get_field_by_index(InstanceKlass* loading_klass, fieldDescriptor& fd, 90 int field_index); 91 static methodHandle get_method_by_index(const constantPoolHandle& cpool, 92 int method_index, Bytecodes::Code bc, 93 InstanceKlass* loading_klass); 94 95 JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter); 96 97 private: 98 CompileTask* _task; 99 int _system_dictionary_modification_counter; 100 101 // Compilation result values 102 const char* _failure_reason; 103 bool _retryable; 104 105 // Cache JVMTI state 106 bool _jvmti_can_hotswap_or_post_breakpoint; 107 bool _jvmti_can_access_local_variables; 108 bool _jvmti_can_post_on_exceptions; 109 110 // Implementation methods for loading and constant pool access. 111 static Klass* get_klass_by_name_impl(Klass* accessing_klass, 112 const constantPoolHandle& cpool, 113 Symbol* klass_name, 114 bool require_local); 115 static Klass* get_klass_by_index_impl(const constantPoolHandle& cpool, 116 int klass_index, 117 bool& is_accessible, 118 Klass* loading_klass); 119 static void get_field_by_index_impl(InstanceKlass* loading_klass, fieldDescriptor& fd, 120 int field_index); 121 static methodHandle get_method_by_index_impl(const constantPoolHandle& cpool, 122 int method_index, Bytecodes::Code bc, 123 InstanceKlass* loading_klass); 124 125 // Helper methods 126 static bool check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass); 127 static methodHandle lookup_method(InstanceKlass* accessor, 128 Klass* holder, 129 Symbol* name, 130 Symbol* sig, 131 Bytecodes::Code bc, 132 constantTag tag); 133 134 private: 135 136 // Is this thread currently in the VM state? 137 static bool is_in_vm(); 138 139 // Helper routine for determining the validity of a compilation 140 // with respect to concurrent class loading. 141 static JVMCIEnv::CodeInstallResult validate_compile_task_dependencies(Dependencies* target, Handle compiled_code, 142 JVMCIEnv* env, char** failure_detail); 143 144 public: task()145 CompileTask* task() { return _task; } 146 failure_reason()147 const char* failure_reason() { return _failure_reason; } retryable()148 bool retryable() { return _retryable; } 149 set_failure(const char * reason,bool retryable)150 void set_failure(const char* reason, bool retryable) { 151 _failure_reason = reason; 152 _retryable = retryable; 153 } 154 155 // Register the result of a compilation. 156 static JVMCIEnv::CodeInstallResult register_method( 157 const methodHandle& target, 158 nmethod*& nm, 159 int entry_bci, 160 CodeOffsets* offsets, 161 int orig_pc_offset, 162 CodeBuffer* code_buffer, 163 int frame_words, 164 OopMapSet* oop_map_set, 165 ExceptionHandlerTable* handler_table, 166 AbstractCompiler* compiler, 167 DebugInformationRecorder* debug_info, 168 Dependencies* dependencies, 169 JVMCIEnv* env, 170 int compile_id, 171 bool has_unsafe_access, 172 bool has_wide_vector, 173 Handle installed_code, 174 Handle compiled_code, 175 Handle speculation_log); 176 177 // converts the Klass* representing the holder of a method into a 178 // InstanceKlass*. This is needed since the holder of a method in 179 // the bytecodes could be an array type. Basically this converts 180 // array types into java/lang/Object and other types stay as they are. 181 static InstanceKlass* get_instance_klass_for_declared_method_holder(Klass* klass); 182 }; 183 184 #endif // SHARE_VM_JVMCI_JVMCIENV_HPP 185