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 "handle_scope-inl.h" 23 #include "jni_internal.h" 24 #include "mirror/class_loader.h" 25 #include "runtime.h" 26 #include "scoped_thread_state_change.h" 27 #include "ScopedUtfChars.h" 28 #include "verify_object-inl.h" 29 30 namespace art { 31 32 static void Runtime_gc(JNIEnv*, jclass) { 33 if (Runtime::Current()->IsExplicitGcDisabled()) { 34 LOG(INFO) << "Explicit GC skipped."; 35 return; 36 } 37 Runtime::Current()->GetHeap()->CollectGarbage(false); 38 } 39 40 static void Runtime_nativeExit(JNIEnv*, jclass, jint status) { 41 LOG(INFO) << "System.exit called, status: " << status; 42 Runtime::Current()->CallExitHook(status); 43 exit(status); 44 } 45 46 static jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader, jstring javaLdLibraryPath) { 47 ScopedUtfChars filename(env, javaFilename); 48 if (filename.c_str() == NULL) { 49 return NULL; 50 } 51 52 if (javaLdLibraryPath != NULL) { 53 ScopedUtfChars ldLibraryPath(env, javaLdLibraryPath); 54 if (ldLibraryPath.c_str() == NULL) { 55 return NULL; 56 } 57 void* sym = dlsym(RTLD_DEFAULT, "android_update_LD_LIBRARY_PATH"); 58 if (sym != NULL) { 59 typedef void (*Fn)(const char*); 60 Fn android_update_LD_LIBRARY_PATH = reinterpret_cast<Fn>(sym); 61 (*android_update_LD_LIBRARY_PATH)(ldLibraryPath.c_str()); 62 } else { 63 LOG(ERROR) << "android_update_LD_LIBRARY_PATH not found; .so dependencies will not work!"; 64 } 65 } 66 67 std::string detail; 68 { 69 ScopedObjectAccess soa(env); 70 StackHandleScope<1> hs(soa.Self()); 71 Handle<mirror::ClassLoader> classLoader( 72 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(javaLoader))); 73 JavaVMExt* vm = Runtime::Current()->GetJavaVM(); 74 bool success = vm->LoadNativeLibrary(filename.c_str(), classLoader, &detail); 75 if (success) { 76 return nullptr; 77 } 78 } 79 80 // Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF. 81 env->ExceptionClear(); 82 return env->NewStringUTF(detail.c_str()); 83 } 84 85 static jlong Runtime_maxMemory(JNIEnv*, jclass) { 86 return Runtime::Current()->GetHeap()->GetMaxMemory(); 87 } 88 89 static jlong Runtime_totalMemory(JNIEnv*, jclass) { 90 return Runtime::Current()->GetHeap()->GetTotalMemory(); 91 } 92 93 static jlong Runtime_freeMemory(JNIEnv*, jclass) { 94 return Runtime::Current()->GetHeap()->GetFreeMemory(); 95 } 96 97 static JNINativeMethod gMethods[] = { 98 NATIVE_METHOD(Runtime, freeMemory, "!()J"), 99 NATIVE_METHOD(Runtime, gc, "()V"), 100 NATIVE_METHOD(Runtime, maxMemory, "!()J"), 101 NATIVE_METHOD(Runtime, nativeExit, "(I)V"), 102 NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;"), 103 NATIVE_METHOD(Runtime, totalMemory, "!()J"), 104 }; 105 106 void register_java_lang_Runtime(JNIEnv* env) { 107 REGISTER_NATIVE_METHODS("java/lang/Runtime"); 108 } 109 110 } // namespace art 111