blob: b96a4d769b0093966737d3e4996148b648387a35 [file] [log] [blame]
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include "jni.h"
#include "heap.h"
#include "indirect_reference_table.h"
#include "macros.h"
#include "mutex.h"
#include "reference_table.h"
#include "runtime.h"
#include <iosfwd>
#include <string>
#define NATIVE_METHOD(className, functionName, signature) \
{ #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName) }
#define REGISTER_NATIVE_METHODS(jni_class_name) \
RegisterNativeMethods(env, jni_class_name, gMethods, arraysize(gMethods))
namespace art {
class ClassLoader;
class Field;
union JValue;
class Libraries;
class Method;
class ScopedJniThreadState;
class Thread;
void SetJniGlobalsMax(size_t max);
void JniAbortF(const char* jni_function_name, const char* fmt, ...);
void* FindNativeMethod(Thread* thread);
void RegisterNativeMethods(JNIEnv* env, const char* jni_class_name, const JNINativeMethod* methods, size_t method_count);
size_t NumArgArrayBytes(const char* shorty, uint32_t shorty_len);
JValue InvokeWithJValues(const ScopedJniThreadState&, jobject obj, jmethodID mid, jvalue* args);
JValue InvokeWithJValues(const ScopedJniThreadState&, Object* receiver, Method* m, JValue* args);
int ThrowNewException(JNIEnv* env, jclass exception_class, const char* msg, jobject cause);
struct JavaVMExt : public JavaVM {
JavaVMExt(Runtime* runtime, Runtime::ParsedOptions* options);
* 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(const std::string& path, ClassLoader* class_loader, std::string& detail);
* 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(Method* m);
void DumpForSigQuit(std::ostream& os);
void DumpReferenceTables(std::ostream& os);
void SetCheckJniEnabled(bool enabled);
void VisitRoots(Heap::RootVisitor*, void*);
Runtime* 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;
// Extra diagnostics.
std::string trace;
// Used to provide compatibility for apps that assumed direct references.
bool work_around_app_jni_bugs;
// Used to hold references to pinned primitive arrays.
Mutex pins_lock;
ReferenceTable pin_table GUARDED_BY(pins_lock);
// JNI global references.
Mutex globals_lock;
IndirectReferenceTable globals GUARDED_BY(globals_lock);
// JNI weak global references.
Mutex weak_globals_lock;
IndirectReferenceTable weak_globals GUARDED_BY(weak_globals_lock);
Mutex libraries_lock;
Libraries* libraries GUARDED_BY(libraries_lock);
// Used by -Xcheck:jni.
const JNIInvokeInterface* unchecked_functions;
struct JNIEnvExt : public JNIEnv {
JNIEnvExt(Thread* self, JavaVMExt* vm);
void DumpReferenceTables(std::ostream& os);
void SetCheckJniEnabled(bool enabled);
void PushFrame(int capacity);
void PopFrame();
static Offset SegmentStateOffset() {
return Offset(OFFSETOF_MEMBER(JNIEnvExt, locals) +
static Offset LocalRefCookieOffset() {
return Offset(OFFSETOF_MEMBER(JNIEnvExt, local_ref_cookie));
Thread* const self;
JavaVMExt* vm;
// Cookie used when using the local indirect reference table.
uint32_t local_ref_cookie;
// JNI local references.
IndirectReferenceTable locals;
// Stack of cookies corresponding to PushLocalFrame/PopLocalFrame calls.
// TODO: to avoid leaks (and bugs), we need to clear this vector on entry (or return)
// to a native method.
std::vector<uint32_t> stacked_local_ref_cookies;
// Frequently-accessed fields cached from JavaVM.
bool check_jni;
// How many nested "critical" JNI calls are we in?
int critical;
// Entered JNI monitors, for bulk exit on thread detach.
ReferenceTable monitors;
// Used by -Xcheck:jni.
const JNINativeInterface* unchecked_functions;
const JNINativeInterface* GetCheckJniNativeInterface();
const JNIInvokeInterface* GetCheckJniInvokeInterface();
// Used to save and restore the JNIEnvExt state when not going through code created by the JNI
// compiler
class ScopedJniEnvLocalRefState {
explicit ScopedJniEnvLocalRefState(JNIEnvExt* env) : env_(env) {
saved_local_ref_cookie_ = env->local_ref_cookie;
env->local_ref_cookie = env->locals.GetSegmentState();
~ScopedJniEnvLocalRefState() {
env_->local_ref_cookie = saved_local_ref_cookie_;
JNIEnvExt* env_;
uint32_t saved_local_ref_cookie_;
} // namespace art
std::ostream& operator<<(std::ostream& os, const jobjectRefType& rhs);