| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_RUNTIME_JAVA_VM_EXT_H_ |
| #define ART_RUNTIME_JAVA_VM_EXT_H_ |
| |
| #include "jni.h" |
| |
| #include "base/macros.h" |
| #include "base/mutex.h" |
| #include "indirect_reference_table.h" |
| #include "reference_table.h" |
| |
| namespace art { |
| |
| namespace mirror { |
| class Array; |
| } // namespace mirror |
| |
| class ArtMethod; |
| class Libraries; |
| class ParsedOptions; |
| class Runtime; |
| struct RuntimeArgumentMap; |
| |
| class JavaVMExt : public JavaVM { |
| public: |
| JavaVMExt(Runtime* runtime, const RuntimeArgumentMap& runtime_options); |
| ~JavaVMExt(); |
| |
| bool ForceCopy() const { |
| return force_copy_; |
| } |
| |
| bool IsCheckJniEnabled() const { |
| return check_jni_; |
| } |
| |
| bool IsTracingEnabled() const { |
| return tracing_enabled_; |
| } |
| |
| Runtime* GetRuntime() const { |
| return runtime_; |
| } |
| |
| void SetCheckJniAbortHook(void (*hook)(void*, const std::string&), void* data) { |
| check_jni_abort_hook_ = hook; |
| check_jni_abort_hook_data_ = data; |
| } |
| |
| // Aborts execution unless there is an abort handler installed in which case it will return. Its |
| // therefore important that callers return after aborting as otherwise code following the abort |
| // will be executed in the abort handler case. |
| void JniAbort(const char* jni_function_name, const char* msg); |
| |
| void JniAbortV(const char* jni_function_name, const char* fmt, va_list ap); |
| |
| void JniAbortF(const char* jni_function_name, const char* fmt, ...) |
| __attribute__((__format__(__printf__, 3, 4))); |
| |
| // If both "-Xcheck:jni" and "-Xjnitrace:" are enabled, we print trace messages |
| // when a native method that matches the -Xjnitrace argument calls a JNI function |
| // such as NewByteArray. |
| // If -verbose:third-party-jni is on, we want to log any JNI function calls |
| // made by a third-party native method. |
| bool ShouldTrace(ArtMethod* method) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| /** |
| * Loads the given shared library. 'path' is an absolute pathname. |
| * |
| * Returns 'true' on success. On failure, sets 'detail' to a |
| * human-readable description of the error. |
| */ |
| bool LoadNativeLibrary(JNIEnv* env, const std::string& path, jobject javaLoader, |
| std::string* error_msg); |
| |
| /** |
| * Returns a pointer to the code for the native method 'm', found |
| * using dlsym(3) on every native library that's been loaded so far. |
| */ |
| void* FindCodeForNativeMethod(ArtMethod* m) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| void DumpForSigQuit(std::ostream& os) |
| LOCKS_EXCLUDED(Locks::jni_libraries_lock_, globals_lock_, weak_globals_lock_); |
| |
| void DumpReferenceTables(std::ostream& os) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| bool SetCheckJniEnabled(bool enabled); |
| |
| void VisitRoots(RootVisitor* visitor) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| void DisallowNewWeakGlobals() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| void AllowNewWeakGlobals() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| void EnsureNewWeakGlobalsDisallowed() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| void BroadcastForNewWeakGlobals() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| jobject AddGlobalRef(Thread* self, mirror::Object* obj) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| jweak AddWeakGlobalRef(Thread* self, mirror::Object* obj) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| void DeleteGlobalRef(Thread* self, jobject obj); |
| |
| void DeleteWeakGlobalRef(Thread* self, jweak obj); |
| |
| void SweepJniWeakGlobals(IsMarkedVisitor* visitor) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| mirror::Object* DecodeGlobal(Thread* self, IndirectRef ref) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| void UpdateGlobal(Thread* self, IndirectRef ref, mirror::Object* result) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| LOCKS_EXCLUDED(globals_lock_); |
| |
| mirror::Object* DecodeWeakGlobal(Thread* self, IndirectRef ref) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| void UpdateWeakGlobal(Thread* self, IndirectRef ref, mirror::Object* result) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| LOCKS_EXCLUDED(weak_globals_lock_); |
| |
| const JNIInvokeInterface* GetUncheckedFunctions() const { |
| return unchecked_functions_; |
| } |
| |
| void TrimGlobals() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| LOCKS_EXCLUDED(globals_lock_); |
| |
| private: |
| Runtime* const runtime_; |
| |
| // Used for testing. By default, we'll LOG(FATAL) the reason. |
| void (*check_jni_abort_hook_)(void* data, const std::string& reason); |
| void* check_jni_abort_hook_data_; |
| |
| // Extra checking. |
| bool check_jni_; |
| bool force_copy_; |
| const bool tracing_enabled_; |
| |
| // Extra diagnostics. |
| const std::string trace_; |
| |
| // JNI global references. |
| ReaderWriterMutex globals_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; |
| // Not guarded by globals_lock since we sometimes use SynchronizedGet in Thread::DecodeJObject. |
| IndirectReferenceTable globals_; |
| |
| std::unique_ptr<Libraries> libraries_ GUARDED_BY(Locks::jni_libraries_lock_); |
| |
| // Used by -Xcheck:jni. |
| const JNIInvokeInterface* const unchecked_functions_; |
| |
| // JNI weak global references. |
| Mutex weak_globals_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; |
| // Since weak_globals_ contain weak roots, be careful not to |
| // directly access the object references in it. Use Get() with the |
| // read barrier enabled. |
| IndirectReferenceTable weak_globals_ GUARDED_BY(weak_globals_lock_); |
| bool allow_new_weak_globals_ GUARDED_BY(weak_globals_lock_); |
| ConditionVariable weak_globals_add_condition_ GUARDED_BY(weak_globals_lock_); |
| |
| DISALLOW_COPY_AND_ASSIGN(JavaVMExt); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_JAVA_VM_EXT_H_ |