168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers/* 268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * Copyright (C) 2011 The Android Open Source Project 368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * 468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * Licensed under the Apache License, Version 2.0 (the "License"); 568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * you may not use this file except in compliance with the License. 668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * You may obtain a copy of the License at 768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * 868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * http://www.apache.org/licenses/LICENSE-2.0 968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * 1068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * Unless required by applicable law or agreed to in writing, software 1168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * distributed under the License is distributed on an "AS IS" BASIS, 1268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * See the License for the specific language governing permissions and 1468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * limitations under the License. 1568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers */ 1668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 1768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#ifndef ART_RUNTIME_JAVA_VM_EXT_H_ 1868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#define ART_RUNTIME_JAVA_VM_EXT_H_ 1968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 2068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#include "jni.h" 2168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 2268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#include "base/macros.h" 2368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#include "base/mutex.h" 2468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#include "indirect_reference_table.h" 2568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#include "reference_table.h" 2668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 2768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersnamespace art { 2868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 2968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersnamespace mirror { 3068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers class Array; 3168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers} // namespace mirror 3268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 33e401d146407d61eeb99f8d6176b2ac13c4df1e33Mathieu Chartierclass ArtMethod; 3468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersclass Libraries; 3568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersclass ParsedOptions; 3668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersclass Runtime; 37aaebaa0121be3b9d9f13630585304482cbcaeb4bIgor Murashkinstruct RuntimeArgumentMap; 3868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 3968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogersclass JavaVMExt : public JavaVM { 4068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers public: 41aaebaa0121be3b9d9f13630585304482cbcaeb4bIgor Murashkin JavaVMExt(Runtime* runtime, const RuntimeArgumentMap& runtime_options); 4268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers ~JavaVMExt(); 4368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 4468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool ForceCopy() const { 4568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers return force_copy_; 4668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 4768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 4868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool IsCheckJniEnabled() const { 4968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers return check_jni_; 5068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 5168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 5268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool IsTracingEnabled() const { 5368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers return tracing_enabled_; 5468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 5568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 5668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers Runtime* GetRuntime() const { 5768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers return runtime_; 5868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 5968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 6068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void SetCheckJniAbortHook(void (*hook)(void*, const std::string&), void* data) { 6168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers check_jni_abort_hook_ = hook; 6268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers check_jni_abort_hook_data_ = data; 6368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 6468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 6568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Aborts execution unless there is an abort handler installed in which case it will return. Its 6668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // therefore important that callers return after aborting as otherwise code following the abort 6768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // will be executed in the abort handler case. 6868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void JniAbort(const char* jni_function_name, const char* msg); 6968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 7068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void JniAbortV(const char* jni_function_name, const char* fmt, va_list ap); 7168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 7268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void JniAbortF(const char* jni_function_name, const char* fmt, ...) 7368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers __attribute__((__format__(__printf__, 3, 4))); 7468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 7568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // If both "-Xcheck:jni" and "-Xjnitrace:" are enabled, we print trace messages 7668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // when a native method that matches the -Xjnitrace argument calls a JNI function 7768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // such as NewByteArray. 7868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // If -verbose:third-party-jni is on, we want to log any JNI function calls 7968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // made by a third-party native method. 8090443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier bool ShouldTrace(ArtMethod* method) SHARED_REQUIRES(Locks::mutator_lock_); 8168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 8268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers /** 8368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * Loads the given shared library. 'path' is an absolute pathname. 8468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * 85f5a3099c509cf9b8a4ce9c3073a4db47e14a23bcDmitriy Ivanov * Returns 'true' on success. On failure, sets 'error_msg' to a 8668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * human-readable description of the error. 8768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers */ 88c286a7fcd8a446c086127bf03fd07f904e017336Dimitry Ivanov bool LoadNativeLibrary(JNIEnv* env, 89c286a7fcd8a446c086127bf03fd07f904e017336Dimitry Ivanov const std::string& path, 90c286a7fcd8a446c086127bf03fd07f904e017336Dimitry Ivanov jobject class_loader, 91c286a7fcd8a446c086127bf03fd07f904e017336Dimitry Ivanov jstring library_path, 92d5bbadf44032510b1ce12d9e5f2adad9234cf6b9Dimitry Ivanov std::string* error_msg); 9368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 94598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier // Unload native libraries with cleared class loaders. 95598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier void UnloadNativeLibraries() 96598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier REQUIRES(!Locks::jni_libraries_lock_) 97598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_); 98598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier 9968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers /** 10068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * Returns a pointer to the code for the native method 'm', found 10168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers * using dlsym(3) on every native library that's been loaded so far. 10268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers */ 103e401d146407d61eeb99f8d6176b2ac13c4df1e33Mathieu Chartier void* FindCodeForNativeMethod(ArtMethod* m) 10490443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_); 10568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 10668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void DumpForSigQuit(std::ostream& os) 10790443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier REQUIRES(!Locks::jni_libraries_lock_, !globals_lock_, !weak_globals_lock_); 10868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 10968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void DumpReferenceTables(std::ostream& os) 11090443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!globals_lock_, !weak_globals_lock_); 11168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 11268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool SetCheckJniEnabled(bool enabled); 11368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 11490443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void VisitRoots(RootVisitor* visitor) SHARED_REQUIRES(Locks::mutator_lock_) 11590443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier REQUIRES(!globals_lock_); 11668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 11790443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void DisallowNewWeakGlobals() SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!weak_globals_lock_); 11890443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void AllowNewWeakGlobals() SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!weak_globals_lock_); 11990443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void BroadcastForNewWeakGlobals() SHARED_REQUIRES(Locks::mutator_lock_) 12090443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier REQUIRES(!weak_globals_lock_); 12168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 12268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers jobject AddGlobalRef(Thread* self, mirror::Object* obj) 12390443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!globals_lock_); 12468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 12568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers jweak AddWeakGlobalRef(Thread* self, mirror::Object* obj) 12690443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!weak_globals_lock_); 12768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 12890443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void DeleteGlobalRef(Thread* self, jobject obj) REQUIRES(!globals_lock_); 12968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 13090443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void DeleteWeakGlobalRef(Thread* self, jweak obj) REQUIRES(!weak_globals_lock_); 13168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 13297509954404d031594b2ecbda607314d169d512eMathieu Chartier void SweepJniWeakGlobals(IsMarkedVisitor* visitor) 13390443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!weak_globals_lock_); 13468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 13530b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier mirror::Object* DecodeGlobal(IndirectRef ref) 13690443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_); 13768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 13883c81955bfbfe8fbe6daf215ca73e436747e3e60Jeff Hao void UpdateGlobal(Thread* self, IndirectRef ref, mirror::Object* result) 13990443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!globals_lock_); 14083c81955bfbfe8fbe6daf215ca73e436747e3e60Jeff Hao 14168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers mirror::Object* DecodeWeakGlobal(Thread* self, IndirectRef ref) 142673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) 143673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier REQUIRES(!weak_globals_lock_); 144673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier 145673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier mirror::Object* DecodeWeakGlobalLocked(Thread* self, IndirectRef ref) 146673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) 147673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier REQUIRES(weak_globals_lock_); 148673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier 149498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi // Like DecodeWeakGlobal() but to be used only during a runtime shutdown where self may be 150498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi // null. 151498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi mirror::Object* DecodeWeakGlobalDuringShutdown(Thread* self, IndirectRef ref) 152498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi SHARED_REQUIRES(Locks::mutator_lock_) 153498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi REQUIRES(!weak_globals_lock_); 154498b160f0cb61ea4756d8ce859ae73c522366458Hiroshi Yamauchi 15504302dbb106d590ff72c0dfecda23d85b6565059Hiroshi Yamauchi // Checks if the weak global ref has been cleared by the GC without decode (read barrier.) 15604302dbb106d590ff72c0dfecda23d85b6565059Hiroshi Yamauchi bool IsWeakGlobalCleared(Thread* self, IndirectRef ref) 15704302dbb106d590ff72c0dfecda23d85b6565059Hiroshi Yamauchi SHARED_REQUIRES(Locks::mutator_lock_) 15804302dbb106d590ff72c0dfecda23d85b6565059Hiroshi Yamauchi REQUIRES(!weak_globals_lock_); 15904302dbb106d590ff72c0dfecda23d85b6565059Hiroshi Yamauchi 160673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier Mutex& WeakGlobalsLock() RETURN_CAPABILITY(weak_globals_lock_) { 161673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier return weak_globals_lock_; 162673ed3d8aedc5462a47ded827c99f35d46525457Mathieu Chartier } 16368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 16483c81955bfbfe8fbe6daf215ca73e436747e3e60Jeff Hao void UpdateWeakGlobal(Thread* self, IndirectRef ref, mirror::Object* result) 16590443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!weak_globals_lock_); 16683c81955bfbfe8fbe6daf215ca73e436747e3e60Jeff Hao 16768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers const JNIInvokeInterface* GetUncheckedFunctions() const { 16868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers return unchecked_functions_; 16968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers } 17068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 17190443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier void TrimGlobals() SHARED_REQUIRES(Locks::mutator_lock_) 17290443477f9a0061581c420775ce3b7eeae7468bcMathieu Chartier REQUIRES(!globals_lock_); 17391c2f0cde2a009bd52aa1c3d1dee705cc02c932fMathieu Chartier 17468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers private: 17530b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier // Return true if self can currently access weak globals. 17630b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier bool MayAccessWeakGlobalsUnlocked(Thread* self) const SHARED_REQUIRES(Locks::mutator_lock_); 17730b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier bool MayAccessWeakGlobals(Thread* self) const 17830b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier SHARED_REQUIRES(Locks::mutator_lock_) 17930b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier REQUIRES(weak_globals_lock_); 18030b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier 18168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers Runtime* const runtime_; 18268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 18368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Used for testing. By default, we'll LOG(FATAL) the reason. 18468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void (*check_jni_abort_hook_)(void* data, const std::string& reason); 18568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers void* check_jni_abort_hook_data_; 18668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 18768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Extra checking. 18868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool check_jni_; 18968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers bool force_copy_; 19068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers const bool tracing_enabled_; 19168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 19268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Extra diagnostics. 19368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers const std::string trace_; 19468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 19568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // JNI global references. 19668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers ReaderWriterMutex globals_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 19768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Not guarded by globals_lock since we sometimes use SynchronizedGet in Thread::DecodeJObject. 19868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers IndirectReferenceTable globals_; 19968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 200598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier // No lock annotation since UnloadNativeLibraries is called on libraries_ but locks the 201598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier // jni_libraries_lock_ internally. 202598302ac91fd3e990f50e1aa530c3ad61d6d946eMathieu Chartier std::unique_ptr<Libraries> libraries_; 20368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 20468d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Used by -Xcheck:jni. 20568d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers const JNIInvokeInterface* const unchecked_functions_; 20668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 20768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // JNI weak global references. 20868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers Mutex weak_globals_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 20968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // Since weak_globals_ contain weak roots, be careful not to 21068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // directly access the object references in it. Use Get() with the 21168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers // read barrier enabled. 21230b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier // Not guarded by weak_globals_lock since we may use SynchronizedGet in DecodeWeakGlobal. 21330b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier IndirectReferenceTable weak_globals_; 21430b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier // Not guarded by weak_globals_lock since we may use SynchronizedGet in DecodeWeakGlobal. 21530b5e27083913bb711fca0ca89a941797fcf3d5dMathieu Chartier Atomic<bool> allow_accessing_weak_globals_; 21668d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers ConditionVariable weak_globals_add_condition_ GUARDED_BY(weak_globals_lock_); 21768d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 21868d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers DISALLOW_COPY_AND_ASSIGN(JavaVMExt); 21968d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers}; 22068d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 22168d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers} // namespace art 22268d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers 22368d8b42ddec39ec0174162d90d4abaa004d1983eIan Rogers#endif // ART_RUNTIME_JAVA_VM_EXT_H_ 224