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/* //device/libs/android_runtime/android_ddm_DdmHandleNativeHeap.cpp
**
** Copyright 2006, 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.
*/
#undef LOG_TAG
#define LOG_TAG "DdmHandleNativeHeap"
#include <JNIHelp.h>
#include <jni.h>
#include <android_runtime/AndroidRuntime.h>
#include <utils/Log.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#if defined(__arm__)
extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
extern "C" void free_malloc_leak_info(uint8_t* info);
#endif
#define MAPS_FILE_SIZE 65 * 1024
struct Header {
size_t mapSize;
size_t allocSize;
size_t allocInfoSize;
size_t totalMemory;
size_t backtraceSize;
};
namespace android {
/*
* Retrieve the native heap information and the info from /proc/<self>/maps,
* copy them into a byte[] with a "struct Header" that holds data offsets,
* and return the array.
*/
static jbyteArray getLeakInfo(JNIEnv *env, jobject clazz)
{
#if defined(__arm__)
// get the info in /proc/[pid]/map
Header header;
memset(&header, 0, sizeof(header));
pid_t pid = getpid();
char path[FILENAME_MAX];
sprintf(path, "/proc/%d/maps", pid);
struct stat sb;
int ret = stat(path, &sb);
uint8_t* mapsFile = NULL;
if (ret == 0) {
mapsFile = (uint8_t*)malloc(MAPS_FILE_SIZE);
int fd = open(path, O_RDONLY);
if (mapsFile != NULL && fd != -1) {
int amount = 0;
do {
uint8_t* ptr = mapsFile + header.mapSize;
amount = read(fd, ptr, MAPS_FILE_SIZE);
if (amount <= 0) {
if (errno != EINTR)
break;
else
continue;
}
header.mapSize += amount;
} while (header.mapSize < MAPS_FILE_SIZE);
LOGD("**** read %d bytes from '%s'", (int) header.mapSize, path);
}
}
uint8_t* allocBytes;
get_malloc_leak_info(&allocBytes, &header.allocSize, &header.allocInfoSize,
&header.totalMemory, &header.backtraceSize);
jbyte* bytes = NULL;
jbyte* ptr = NULL;
jbyteArray array = env->NewByteArray(sizeof(Header) + header.mapSize + header.allocSize);
if (array == NULL) {
goto done;
}
bytes = env->GetByteArrayElements(array, NULL);
ptr = bytes;
// LOGD("*** mapSize: %d allocSize: %d allocInfoSize: %d totalMemory: %d",
// header.mapSize, header.allocSize, header.allocInfoSize, header.totalMemory);
memcpy(ptr, &header, sizeof(header));
ptr += sizeof(header);
if (header.mapSize > 0 && mapsFile != NULL) {
memcpy(ptr, mapsFile, header.mapSize);
ptr += header.mapSize;
}
memcpy(ptr, allocBytes, header.allocSize);
env->ReleaseByteArrayElements(array, bytes, 0);
done:
if (mapsFile != NULL) {
free(mapsFile);
}
// free the info up!
free_malloc_leak_info(allocBytes);
return array;
#else
return NULL;
#endif
}
static JNINativeMethod method_table[] = {
{ "getLeakInfo", "()[B", (void*)getLeakInfo },
};
int register_android_ddm_DdmHandleNativeHeap(JNIEnv *env)
{
return AndroidRuntime::registerNativeMethods(env, "android/ddm/DdmHandleNativeHeap", method_table, NELEM(method_table));
}
};
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