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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.
*/
/*
* java.lang.Runtime
*/
#include "Dalvik.h"
#include "native/InternalNativePriv.h"
#include <unistd.h>
#include <limits.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, boolean isExit)
*
* 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];
bool isExit = (args[1] != 0);
if (isExit && gDvm.exitHook != NULL) {
dvmChangeStatus(NULL, THREAD_NATIVE);
(*gDvm.exitHook)(status); // not expected to return
dvmChangeStatus(NULL, THREAD_RUNNING);
LOGW("JNI exit hook returned");
}
LOGD("Calling exit(%d)", status);
#if defined(WITH_JIT) && defined(WITH_JIT_TUNING)
dvmCompilerDumpStats();
#endif
exit(status);
}
/*
* static String nativeLoad(String filename, ClassLoader loader)
*
* 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];
char* fileName = NULL;
StringObject* result = NULL;
char* reason = NULL;
bool success;
assert(fileNameObj != NULL);
fileName = dvmCreateCstrFromString(fileNameObj);
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", "(IZ)V",
Dalvik_java_lang_Runtime_nativeExit },
{ "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/lang/String;",
Dalvik_java_lang_Runtime_nativeLoad },
{ "totalMemory", "()J",
Dalvik_java_lang_Runtime_totalMemory },
{ NULL, NULL, NULL },
};
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