The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* //device/libs/android_runtime/android_ddm_DdmHandleNativeHeap.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #undef LOG_TAG |
| 19 | #define LOG_TAG "DdmHandleNativeHeap" |
| 20 | |
| 21 | #include <JNIHelp.h> |
| 22 | #include <jni.h> |
| 23 | #include <android_runtime/AndroidRuntime.h> |
| 24 | |
| 25 | #include <utils/Log.h> |
| 26 | |
| 27 | #include <fcntl.h> |
| 28 | #include <errno.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #if defined(__arm__) |
| 33 | extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize, |
| 34 | size_t* infoSize, size_t* totalMemory, size_t* backtraceSize); |
| 35 | |
| 36 | extern "C" void free_malloc_leak_info(uint8_t* info); |
| 37 | #endif |
| 38 | |
| 39 | #define MAPS_FILE_SIZE 65 * 1024 |
| 40 | |
| 41 | struct Header { |
| 42 | size_t mapSize; |
| 43 | size_t allocSize; |
| 44 | size_t allocInfoSize; |
| 45 | size_t totalMemory; |
| 46 | size_t backtraceSize; |
| 47 | }; |
| 48 | |
| 49 | namespace android { |
| 50 | |
| 51 | /* |
| 52 | * Retrieve the native heap information and the info from /proc/<self>/maps, |
| 53 | * copy them into a byte[] with a "struct Header" that holds data offsets, |
| 54 | * and return the array. |
| 55 | */ |
| 56 | static jbyteArray getLeakInfo(JNIEnv *env, jobject clazz) |
| 57 | { |
| 58 | #if defined(__arm__) |
| 59 | // get the info in /proc/[pid]/map |
| 60 | Header header; |
| 61 | memset(&header, 0, sizeof(header)); |
| 62 | |
| 63 | pid_t pid = getpid(); |
| 64 | |
| 65 | char path[FILENAME_MAX]; |
| 66 | sprintf(path, "/proc/%d/maps", pid); |
| 67 | |
| 68 | struct stat sb; |
| 69 | int ret = stat(path, &sb); |
| 70 | |
| 71 | uint8_t* mapsFile = NULL; |
| 72 | if (ret == 0) { |
| 73 | mapsFile = (uint8_t*)malloc(MAPS_FILE_SIZE); |
| 74 | int fd = open(path, O_RDONLY); |
| 75 | |
| 76 | if (mapsFile != NULL && fd != -1) { |
| 77 | int amount = 0; |
| 78 | do { |
| 79 | uint8_t* ptr = mapsFile + header.mapSize; |
| 80 | amount = read(fd, ptr, MAPS_FILE_SIZE); |
| 81 | if (amount <= 0) { |
| 82 | if (errno != EINTR) |
| 83 | break; |
| 84 | else |
| 85 | continue; |
| 86 | } |
| 87 | header.mapSize += amount; |
| 88 | } while (header.mapSize < MAPS_FILE_SIZE); |
| 89 | |
Steve Block | 5baa3a6 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 90 | ALOGD("**** read %d bytes from '%s'", (int) header.mapSize, path); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 91 | } |
| 92 | } |
| 93 | |
| 94 | uint8_t* allocBytes; |
| 95 | get_malloc_leak_info(&allocBytes, &header.allocSize, &header.allocInfoSize, |
| 96 | &header.totalMemory, &header.backtraceSize); |
| 97 | |
| 98 | jbyte* bytes = NULL; |
| 99 | jbyte* ptr = NULL; |
| 100 | jbyteArray array = env->NewByteArray(sizeof(Header) + header.mapSize + header.allocSize); |
| 101 | if (array == NULL) { |
| 102 | goto done; |
| 103 | } |
| 104 | |
| 105 | bytes = env->GetByteArrayElements(array, NULL); |
| 106 | ptr = bytes; |
| 107 | |
Steve Block | 5baa3a6 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 108 | // ALOGD("*** mapSize: %d allocSize: %d allocInfoSize: %d totalMemory: %d", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 109 | // header.mapSize, header.allocSize, header.allocInfoSize, header.totalMemory); |
| 110 | |
| 111 | memcpy(ptr, &header, sizeof(header)); |
| 112 | ptr += sizeof(header); |
| 113 | |
| 114 | if (header.mapSize > 0 && mapsFile != NULL) { |
| 115 | memcpy(ptr, mapsFile, header.mapSize); |
| 116 | ptr += header.mapSize; |
| 117 | } |
| 118 | |
| 119 | memcpy(ptr, allocBytes, header.allocSize); |
| 120 | env->ReleaseByteArrayElements(array, bytes, 0); |
| 121 | |
| 122 | done: |
| 123 | if (mapsFile != NULL) { |
| 124 | free(mapsFile); |
| 125 | } |
| 126 | // free the info up! |
| 127 | free_malloc_leak_info(allocBytes); |
| 128 | |
| 129 | return array; |
| 130 | #else |
| 131 | return NULL; |
| 132 | #endif |
| 133 | } |
| 134 | |
| 135 | static JNINativeMethod method_table[] = { |
| 136 | { "getLeakInfo", "()[B", (void*)getLeakInfo }, |
| 137 | }; |
| 138 | |
| 139 | int register_android_ddm_DdmHandleNativeHeap(JNIEnv *env) |
| 140 | { |
| 141 | return AndroidRuntime::registerNativeMethods(env, "android/ddm/DdmHandleNativeHeap", method_table, NELEM(method_table)); |
| 142 | } |
| 143 | |
| 144 | }; |