java_lang_Runtime.cc revision 8718359763aa3dcd0033a2d2e67e0cb145fb9c53
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <dlfcn.h> 18#include <limits.h> 19#include <unistd.h> 20 21#include "gc/heap.h" 22#include "jni_internal.h" 23#include "mirror/class_loader.h" 24#include "runtime.h" 25#include "scoped_thread_state_change.h" 26#include "ScopedUtfChars.h" 27 28namespace art { 29 30static void Runtime_gc(JNIEnv*, jclass) { 31 if (Runtime::Current()->IsExplicitGcDisabled()) { 32 LOG(INFO) << "Explicit GC skipped."; 33 return; 34 } 35 Runtime::Current()->GetHeap()->CollectGarbage(false); 36} 37 38static void Runtime_nativeExit(JNIEnv*, jclass, jint status) { 39 Runtime::Current()->CallExitHook(status); 40 exit(status); 41} 42 43static jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader, jstring javaLdLibraryPath) { 44 ScopedObjectAccess soa(env); 45 ScopedUtfChars filename(env, javaFilename); 46 if (filename.c_str() == NULL) { 47 return NULL; 48 } 49 50 if (javaLdLibraryPath != NULL) { 51 ScopedUtfChars ldLibraryPath(env, javaLdLibraryPath); 52 if (ldLibraryPath.c_str() == NULL) { 53 return NULL; 54 } 55 void* sym = dlsym(RTLD_DEFAULT, "android_update_LD_LIBRARY_PATH"); 56 if (sym != NULL) { 57 typedef void (*Fn)(const char*); 58 Fn android_update_LD_LIBRARY_PATH = reinterpret_cast<Fn>(sym); 59 (*android_update_LD_LIBRARY_PATH)(ldLibraryPath.c_str()); 60 } else { 61 LOG(ERROR) << "android_update_LD_LIBRARY_PATH not found; .so dependencies will not work!"; 62 } 63 } 64 65 mirror::ClassLoader* classLoader = soa.Decode<mirror::ClassLoader*>(javaLoader); 66 std::string detail; 67 JavaVMExt* vm = Runtime::Current()->GetJavaVM(); 68 bool success = vm->LoadNativeLibrary(filename.c_str(), classLoader, detail); 69 if (success) { 70 return NULL; 71 } 72 73 // Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF. 74 env->ExceptionClear(); 75 return env->NewStringUTF(detail.c_str()); 76} 77 78static jlong Runtime_maxMemory(JNIEnv*, jclass) { 79 return Runtime::Current()->GetHeap()->GetMaxMemory(); 80} 81 82static jlong Runtime_totalMemory(JNIEnv*, jclass) { 83 return Runtime::Current()->GetHeap()->GetTotalMemory(); 84} 85 86static jlong Runtime_freeMemory(JNIEnv*, jclass) { 87 return Runtime::Current()->GetHeap()->GetFreeMemory(); 88} 89 90static JNINativeMethod gMethods[] = { 91 NATIVE_METHOD(Runtime, freeMemory, "()J"), 92 NATIVE_METHOD(Runtime, gc, "()V"), 93 NATIVE_METHOD(Runtime, maxMemory, "()J"), 94 NATIVE_METHOD(Runtime, nativeExit, "(I)V"), 95 NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;"), 96 NATIVE_METHOD(Runtime, totalMemory, "()J"), 97}; 98 99void register_java_lang_Runtime(JNIEnv* env) { 100 REGISTER_NATIVE_METHODS("java/lang/Runtime"); 101} 102 103} // namespace art 104