| /* |
| * 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. |
| */ |
| |
| /* |
| * java.lang.Runtime |
| */ |
| #include "Dalvik.h" |
| #include "native/InternalNativePriv.h" |
| |
| #include <dlfcn.h> |
| #include <limits.h> |
| #include <unistd.h> |
| |
| /* |
| * public void gc() |
| * |
| * Initiate a gc. |
| */ |
| static void Dalvik_java_lang_Runtime_gc(const u4* args, JValue* pResult) |
| { |
| UNUSED_PARAMETER(args); |
| |
| dvmCollectGarbage(); |
| RETURN_VOID(); |
| } |
| |
| /* |
| * private static void nativeExit(int code) |
| * |
| * Runtime.exit() calls this after doing shutdown processing. Runtime.halt() |
| * uses this as well. |
| */ |
| static void Dalvik_java_lang_Runtime_nativeExit(const u4* args, |
| JValue* pResult) |
| { |
| int status = args[0]; |
| if (gDvm.exitHook != NULL) { |
| dvmChangeStatus(NULL, THREAD_NATIVE); |
| (*gDvm.exitHook)(status); // not expected to return |
| dvmChangeStatus(NULL, THREAD_RUNNING); |
| ALOGW("JNI exit hook returned"); |
| } |
| #if defined(WITH_JIT) && defined(WITH_JIT_TUNING) |
| dvmCompilerDumpStats(); |
| #endif |
| ALOGD("Calling exit(%d)", status); |
| exit(status); |
| } |
| |
| /* |
| * static String nativeLoad(String filename, ClassLoader loader, String ldLibraryPath) |
| * |
| * Load the specified full path as a dynamic library filled with |
| * JNI-compatible methods. Returns null on success, or a failure |
| * message on failure. |
| */ |
| static void Dalvik_java_lang_Runtime_nativeLoad(const u4* args, |
| JValue* pResult) |
| { |
| StringObject* fileNameObj = (StringObject*) args[0]; |
| Object* classLoader = (Object*) args[1]; |
| StringObject* ldLibraryPathObj = (StringObject*) args[2]; |
| |
| assert(fileNameObj != NULL); |
| char* fileName = dvmCreateCstrFromString(fileNameObj); |
| |
| if (ldLibraryPathObj != NULL) { |
| char* ldLibraryPath = dvmCreateCstrFromString(ldLibraryPathObj); |
| void* sym = dlsym(RTLD_DEFAULT, "android_update_LD_LIBRARY_PATH"); |
| if (sym != NULL) { |
| typedef void (*Fn)(const char*); |
| Fn android_update_LD_LIBRARY_PATH = reinterpret_cast<Fn>(sym); |
| (*android_update_LD_LIBRARY_PATH)(ldLibraryPath); |
| } else { |
| ALOGE("android_update_LD_LIBRARY_PATH not found; .so dependencies will not work!"); |
| } |
| free(ldLibraryPath); |
| } |
| |
| StringObject* result = NULL; |
| char* reason = NULL; |
| bool success = dvmLoadNativeCode(fileName, classLoader, &reason); |
| if (!success) { |
| const char* msg = (reason != NULL) ? reason : "unknown failure"; |
| result = dvmCreateStringFromCstr(msg); |
| dvmReleaseTrackedAlloc((Object*) result, NULL); |
| } |
| |
| free(reason); |
| free(fileName); |
| RETURN_PTR(result); |
| } |
| |
| /* |
| * public long maxMemory() |
| * |
| * Returns GC heap max memory in bytes. |
| */ |
| static void Dalvik_java_lang_Runtime_maxMemory(const u4* args, JValue* pResult) |
| { |
| RETURN_LONG(dvmGetHeapDebugInfo(kVirtualHeapMaximumSize)); |
| } |
| |
| /* |
| * public long totalMemory() |
| * |
| * Returns GC heap total memory in bytes. |
| */ |
| static void Dalvik_java_lang_Runtime_totalMemory(const u4* args, |
| JValue* pResult) |
| { |
| RETURN_LONG(dvmGetHeapDebugInfo(kVirtualHeapSize)); |
| } |
| |
| /* |
| * public long freeMemory() |
| * |
| * Returns GC heap free memory in bytes. |
| */ |
| static void Dalvik_java_lang_Runtime_freeMemory(const u4* args, |
| JValue* pResult) |
| { |
| size_t size = dvmGetHeapDebugInfo(kVirtualHeapSize); |
| size_t allocated = dvmGetHeapDebugInfo(kVirtualHeapAllocated); |
| long long result = size - allocated; |
| if (result < 0) { |
| result = 0; |
| } |
| RETURN_LONG(result); |
| } |
| |
| const DalvikNativeMethod dvm_java_lang_Runtime[] = { |
| { "freeMemory", "()J", |
| Dalvik_java_lang_Runtime_freeMemory }, |
| { "gc", "()V", |
| Dalvik_java_lang_Runtime_gc }, |
| { "maxMemory", "()J", |
| Dalvik_java_lang_Runtime_maxMemory }, |
| { "nativeExit", "(I)V", |
| Dalvik_java_lang_Runtime_nativeExit }, |
| { "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;", |
| Dalvik_java_lang_Runtime_nativeLoad }, |
| { "totalMemory", "()J", |
| Dalvik_java_lang_Runtime_totalMemory }, |
| { NULL, NULL, NULL }, |
| }; |