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 <limits.h> 18 19 #include "class_linker.h" 20 #include "common_throws.h" 21 #include "debugger.h" 22 #include "dex_file-inl.h" 23 #include "gc/allocator/dlmalloc.h" 24 #include "gc/heap.h" 25 #include "gc/space/dlmalloc_space.h" 26 #include "jni_internal.h" 27 #include "mirror/class-inl.h" 28 #include "mirror/object.h" 29 #include "mirror/object-inl.h" 30 #include "object_utils.h" 31 #include "scoped_thread_state_change.h" 32 #include "thread.h" 33 #include "thread_list.h" 34 #include "toStringArray.h" 35 36 namespace art { 37 38 static jfloat VMRuntime_getTargetHeapUtilization(JNIEnv*, jobject) { 39 return Runtime::Current()->GetHeap()->GetTargetHeapUtilization(); 40 } 41 42 static void VMRuntime_nativeSetTargetHeapUtilization(JNIEnv*, jobject, jfloat target) { 43 Runtime::Current()->GetHeap()->SetTargetHeapUtilization(target); 44 } 45 46 static void VMRuntime_startJitCompilation(JNIEnv*, jobject) { 47 } 48 49 static void VMRuntime_disableJitCompilation(JNIEnv*, jobject) { 50 } 51 52 static jobject VMRuntime_newNonMovableArray(JNIEnv* env, jobject, jclass javaElementClass, jint length) { 53 ScopedObjectAccess soa(env); 54 #ifdef MOVING_GARBAGE_COLLECTOR 55 // TODO: right now, we don't have a copying collector, so there's no need 56 // to do anything special here, but we ought to pass the non-movability 57 // through to the allocator. 58 UNIMPLEMENTED(FATAL); 59 #endif 60 61 mirror::Class* element_class = soa.Decode<mirror::Class*>(javaElementClass); 62 if (element_class == NULL) { 63 ThrowNullPointerException(NULL, "element class == null"); 64 return NULL; 65 } 66 if (length < 0) { 67 ThrowNegativeArraySizeException(length); 68 return NULL; 69 } 70 71 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 72 std::string descriptor; 73 descriptor += "["; 74 descriptor += ClassHelper(element_class).GetDescriptor(); 75 mirror::Class* array_class = class_linker->FindClass(descriptor.c_str(), NULL); 76 mirror::Array* result = mirror::Array::Alloc(soa.Self(), array_class, length); 77 return soa.AddLocalReference<jobject>(result); 78 } 79 80 static jlong VMRuntime_addressOf(JNIEnv* env, jobject, jobject javaArray) { 81 if (javaArray == NULL) { // Most likely allocation failed 82 return 0; 83 } 84 ScopedObjectAccess soa(env); 85 mirror::Array* array = soa.Decode<mirror::Array*>(javaArray); 86 if (!array->IsArrayInstance()) { 87 ThrowIllegalArgumentException(NULL, "not an array"); 88 return 0; 89 } 90 // TODO: we should also check that this is a non-movable array. 91 return reinterpret_cast<uintptr_t>(array->GetRawData(array->GetClass()->GetComponentSize())); 92 } 93 94 static void VMRuntime_clearGrowthLimit(JNIEnv*, jobject) { 95 Runtime::Current()->GetHeap()->ClearGrowthLimit(); 96 } 97 98 static jboolean VMRuntime_isDebuggerActive(JNIEnv*, jobject) { 99 return Dbg::IsDebuggerActive(); 100 } 101 102 static jobjectArray VMRuntime_properties(JNIEnv* env, jobject) { 103 return toStringArray(env, Runtime::Current()->GetProperties()); 104 } 105 106 // This is for backward compatibility with dalvik which returned the 107 // meaningless "." when no boot classpath or classpath was 108 // specified. Unfortunately, some tests were using java.class.path to 109 // lookup relative file locations, so they are counting on this to be 110 // ".", presumably some applications or libraries could have as well. 111 static const char* DefaultToDot(const std::string& class_path) { 112 return class_path.empty() ? "." : class_path.c_str(); 113 } 114 115 static jstring VMRuntime_bootClassPath(JNIEnv* env, jobject) { 116 return env->NewStringUTF(DefaultToDot(Runtime::Current()->GetBootClassPathString())); 117 } 118 119 static jstring VMRuntime_classPath(JNIEnv* env, jobject) { 120 return env->NewStringUTF(DefaultToDot(Runtime::Current()->GetClassPathString())); 121 } 122 123 static jstring VMRuntime_vmVersion(JNIEnv* env, jobject) { 124 return env->NewStringUTF(Runtime::Current()->GetVersion()); 125 } 126 127 static jstring VMRuntime_vmLibrary(JNIEnv* env, jobject) { 128 return env->NewStringUTF(kIsDebugBuild ? "libartd.so" : "libart.so"); 129 } 130 131 static void VMRuntime_setTargetSdkVersion(JNIEnv* env, jobject, jint targetSdkVersion) { 132 // This is the target SDK version of the app we're about to run. 133 // Note that targetSdkVersion may be CUR_DEVELOPMENT (10000). 134 // Note that targetSdkVersion may be 0, meaning "current". 135 if (targetSdkVersion > 0 && targetSdkVersion <= 13 /* honeycomb-mr2 */) { 136 Runtime* runtime = Runtime::Current(); 137 JavaVMExt* vm = runtime->GetJavaVM(); 138 if (vm->check_jni) { 139 LOG(INFO) << "CheckJNI enabled: not enabling JNI app bug workarounds."; 140 } else { 141 LOG(INFO) << "Turning on JNI app bug workarounds for target SDK version " 142 << targetSdkVersion << "..."; 143 144 vm->work_around_app_jni_bugs = true; 145 } 146 } 147 } 148 149 static void VMRuntime_registerNativeAllocation(JNIEnv* env, jobject, jint bytes) { 150 ScopedObjectAccess soa(env); 151 if (bytes < 0) { 152 ThrowRuntimeException("allocation size negative %d", bytes); 153 return; 154 } 155 Runtime::Current()->GetHeap()->RegisterNativeAllocation(bytes); 156 } 157 158 static void VMRuntime_registerNativeFree(JNIEnv* env, jobject, jint bytes) { 159 ScopedObjectAccess soa(env); 160 if (bytes < 0) { 161 ThrowRuntimeException("allocation size negative %d", bytes); 162 return; 163 } 164 Runtime::Current()->GetHeap()->RegisterNativeFree(bytes); 165 } 166 167 static void VMRuntime_trimHeap(JNIEnv*, jobject) { 168 uint64_t start_ns = NanoTime(); 169 170 // Trim the managed heap. 171 gc::Heap* heap = Runtime::Current()->GetHeap(); 172 gc::space::DlMallocSpace* alloc_space = heap->GetAllocSpace(); 173 size_t alloc_space_size = alloc_space->Size(); 174 float managed_utilization = 175 static_cast<float>(alloc_space->GetBytesAllocated()) / alloc_space_size; 176 size_t managed_reclaimed = heap->Trim(); 177 178 uint64_t gc_heap_end_ns = NanoTime(); 179 180 // Trim the native heap. 181 dlmalloc_trim(0); 182 size_t native_reclaimed = 0; 183 dlmalloc_inspect_all(DlmallocMadviseCallback, &native_reclaimed); 184 185 uint64_t end_ns = NanoTime(); 186 187 LOG(INFO) << "Heap trim of managed (duration=" << PrettyDuration(gc_heap_end_ns - start_ns) 188 << ", advised=" << PrettySize(managed_reclaimed) << ") and native (duration=" 189 << PrettyDuration(end_ns - gc_heap_end_ns) << ", advised=" << PrettySize(native_reclaimed) 190 << ") heaps. Managed heap utilization of " << static_cast<int>(100 * managed_utilization) 191 << "%."; 192 } 193 194 static void VMRuntime_concurrentGC(JNIEnv* env, jobject) { 195 Thread* self = static_cast<JNIEnvExt*>(env)->self; 196 Runtime::Current()->GetHeap()->ConcurrentGC(self); 197 } 198 199 static JNINativeMethod gMethods[] = { 200 NATIVE_METHOD(VMRuntime, addressOf, "(Ljava/lang/Object;)J"), 201 NATIVE_METHOD(VMRuntime, bootClassPath, "()Ljava/lang/String;"), 202 NATIVE_METHOD(VMRuntime, classPath, "()Ljava/lang/String;"), 203 NATIVE_METHOD(VMRuntime, clearGrowthLimit, "()V"), 204 NATIVE_METHOD(VMRuntime, concurrentGC, "()V"), 205 NATIVE_METHOD(VMRuntime, disableJitCompilation, "()V"), 206 NATIVE_METHOD(VMRuntime, getTargetHeapUtilization, "()F"), 207 NATIVE_METHOD(VMRuntime, isDebuggerActive, "()Z"), 208 NATIVE_METHOD(VMRuntime, nativeSetTargetHeapUtilization, "(F)V"), 209 NATIVE_METHOD(VMRuntime, newNonMovableArray, "(Ljava/lang/Class;I)Ljava/lang/Object;"), 210 NATIVE_METHOD(VMRuntime, properties, "()[Ljava/lang/String;"), 211 NATIVE_METHOD(VMRuntime, setTargetSdkVersion, "(I)V"), 212 NATIVE_METHOD(VMRuntime, registerNativeAllocation, "(I)V"), 213 NATIVE_METHOD(VMRuntime, registerNativeFree, "(I)V"), 214 NATIVE_METHOD(VMRuntime, startJitCompilation, "()V"), 215 NATIVE_METHOD(VMRuntime, trimHeap, "()V"), 216 NATIVE_METHOD(VMRuntime, vmVersion, "()Ljava/lang/String;"), 217 NATIVE_METHOD(VMRuntime, vmLibrary, "()Ljava/lang/String;"), 218 }; 219 220 void register_dalvik_system_VMRuntime(JNIEnv* env) { 221 REGISTER_NATIVE_METHODS("dalvik/system/VMRuntime"); 222 } 223 224 } // namespace art 225
