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/*
* Copyright (C) 2008 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.
*/
#include "java_lang_Runtime.h"
#include <dlfcn.h>
#include <limits.h>
#include <unistd.h>
#include "base/macros.h"
#include "gc/heap.h"
#include "handle_scope-inl.h"
#include "jni_internal.h"
#include "mirror/class_loader.h"
#include "runtime.h"
#include "scoped_thread_state_change.h"
#include "ScopedUtfChars.h"
#include "verify_object-inl.h"
#include <sstream>
#ifdef __ANDROID__
// This function is provided by android linker.
extern "C" void android_update_LD_LIBRARY_PATH(const char* ld_library_path);
#endif // __ANDROID__
namespace art {
static void Runtime_gc(JNIEnv*, jclass) {
if (Runtime::Current()->IsExplicitGcDisabled()) {
LOG(INFO) << "Explicit GC skipped.";
return;
}
Runtime::Current()->GetHeap()->CollectGarbage(false);
}
NO_RETURN static void Runtime_nativeExit(JNIEnv*, jclass, jint status) {
LOG(INFO) << "System.exit called, status: " << status;
Runtime::Current()->CallExitHook(status);
exit(status);
}
static void SetLdLibraryPath(JNIEnv* env, jstring javaLdLibraryPath) {
#ifdef __ANDROID__
if (javaLdLibraryPath != nullptr) {
ScopedUtfChars ldLibraryPath(env, javaLdLibraryPath);
if (ldLibraryPath.c_str() != nullptr) {
android_update_LD_LIBRARY_PATH(ldLibraryPath.c_str());
}
}
#else
LOG(WARNING) << "android_update_LD_LIBRARY_PATH not found; .so dependencies will not work!";
UNUSED(javaLdLibraryPath, env);
#endif
}
static jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader,
jstring javaLdLibraryPath, jstring javaIsolationPath) {
ScopedUtfChars filename(env, javaFilename);
if (filename.c_str() == nullptr) {
return nullptr;
}
int32_t target_sdk_version = Runtime::Current()->GetTargetSdkVersion();
// Starting with N nativeLoad uses classloader local
// linker namespace instead of global LD_LIBRARY_PATH
// (23 is Marshmallow)
if (target_sdk_version <= INT_MAX) {
SetLdLibraryPath(env, javaLdLibraryPath);
}
std::string error_msg;
{
JavaVMExt* vm = Runtime::Current()->GetJavaVM();
bool success = vm->LoadNativeLibrary(env, filename.c_str(), javaLoader,
javaLdLibraryPath, javaIsolationPath, &error_msg);
if (success) {
return nullptr;
}
}
// Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF.
env->ExceptionClear();
return env->NewStringUTF(error_msg.c_str());
}
static jlong Runtime_maxMemory(JNIEnv*, jclass) {
return Runtime::Current()->GetHeap()->GetMaxMemory();
}
static jlong Runtime_totalMemory(JNIEnv*, jclass) {
return Runtime::Current()->GetHeap()->GetTotalMemory();
}
static jlong Runtime_freeMemory(JNIEnv*, jclass) {
return Runtime::Current()->GetHeap()->GetFreeMemory();
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(Runtime, freeMemory, "!()J"),
NATIVE_METHOD(Runtime, gc, "()V"),
NATIVE_METHOD(Runtime, maxMemory, "!()J"),
NATIVE_METHOD(Runtime, nativeExit, "(I)V"),
NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;"),
NATIVE_METHOD(Runtime, totalMemory, "!()J"),
};
void register_java_lang_Runtime(JNIEnv* env) {
REGISTER_NATIVE_METHODS("java/lang/Runtime");
}
} // namespace art
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