| /* //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)); |
| } |
| |
| }; |