/*
* Given an open optimized DEX file, map it into read-only shared memory and
* parse the contents.
*
* Returns nonzero on error.
*/
int dvmDexFileOpenFromFd(int fd, DvmDex** ppDvmDex)
{
DvmDex* pDvmDex;
DexFile* pDexFile;
MemMapping memMap;
int parseFlags = kDexParseDefault;
int result = -1;
if (gDvm.verifyDexChecksum)
parseFlags |= kDexParseVerifyChecksum;
if (lseek(fd, 0, SEEK_SET) < 0) {
LOGE("lseek rewind failed\n");
goto bail;
}
if (sysMapFileInShmemWritableReadOnly(fd, &memMap) != 0) {
LOGE("Unable to map file\n");
goto bail;
}
pDexFile = dexFileParse(memMap.addr, memMap.length, parseFlags);
if (pDexFile == NULL) {
LOGE("DEX parse failed\n");
sysReleaseShmem(&memMap);
goto bail;
}
pDvmDex = allocateAuxStructures(pDexFile);
if (pDvmDex == NULL) {
dexFileFree(pDexFile);
sysReleaseShmem(&memMap);
goto bail;
}
//This seems like the best place to initialize the DvmDex mutex.
dvmInitMutex(&pDvmDex->modLock);
/* tuck this into the DexFile so it gets released later */
sysCopyMap(&pDvmDex->memMap, &memMap);
*ppDvmDex = pDvmDex;
result = 0;
bail:
return result;
}
/*
Given an open optimized DEX file, map it into read-only shared memory and
parse the contents.
Returns nonzero on error.
给定一个打开的已优化的DEX文件，映射到只读共享内存并且解析内容。
错误返回非0。
*/
int dvmDexFileOpenFromFd(int fd, DvmDex** ppDvmDex)
{
DvmDex* pDvmDex;
DexFile* pDexFile;
MemMapping memMap;
int parseFlags = kDexParseDefault;
int result = -1;
if (gDvm.verifyDexChecksum)
parseFlags |= kDexParseVerifyChecksum;
if (lseek(fd, 0, SEEK_SET) < 0) {
ALOGE("lseek rewind failed");
goto bail;
}
if (sysMapFileInShmemWritableReadOnly(fd, &memMap) != 0) {
ALOGE("Unable to map file");
goto bail;
}
pDexFile = dexFileParse((u1*)memMap.addr, memMap.length, parseFlags);
if (pDexFile == NULL) {
ALOGE("DEX parse failed");
sysReleaseShmem(&memMap);
goto bail;
}
pDvmDex = allocateAuxStructures(pDexFile);
if (pDvmDex == NULL) {
dexFileFree(pDexFile);
sysReleaseShmem(&memMap);
goto bail;
}
/* tuck this into the DexFile so it gets released later */
sysCopyMap(&pDvmDex->memMap, &memMap);
pDvmDex->isMappedReadOnly = true;
*ppDvmDex = pDvmDex;
result = 0;
bail:
return result;
}
/*
* Prepare to access a ZipArchive in an open file descriptor.
*/
int dexZipPrepArchive(int fd, const char* debugFileName, ZipArchive* pArchive)
{
MemMapping map;
int err;
map.addr = NULL;
memset(pArchive, 0, sizeof(*pArchive));
pArchive->mFd = fd;
if (sysMapFileInShmem(pArchive->mFd, &map) != 0) {
err = -1;
LOGW("Map of '%s' failed\n", debugFileName);
goto bail;
}
if (map.length < kEOCDLen) {
err = -1;
LOGV("File '%s' too small to be zip (%zd)\n", debugFileName,map.length);
goto bail;
}
if (!parseZipArchive(pArchive, &map)) {
err = -1;
LOGV("Parsing '%s' failed\n", debugFileName);
goto bail;
}
/* success */
err = 0;
sysCopyMap(&pArchive->mMap, &map);
map.addr = NULL;
bail:
if (err != 0)
dexZipCloseArchive(pArchive);
if (map.addr != NULL)
sysReleaseShmem(&map);
return err;
}
/*
* Given an open optimized DEX file, map it into read-only shared memory and
* parse the contents.
*
* Returns nonzero on error.
*/
int dvmDexFileOpenFromFd(int fd, DvmDex** ppDvmDex)
{
DvmDex* pDvmDex;
DexFile* pDexFile;
MemMapping memMap;
int parseFlags = kDexParseDefault;
int result = -1;
// //salma //Success here
// All the file manipulation moved to the JarFile.cpp
//DvmConfigFile* pDvmConfigFile;
// int configFd = -1;
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: Try to open config.xml");
// configFd = open("/sdcard/config.xml", O_RDONLY);
// if(configFd < 0)
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: FAIL Try to open config.xml");
// else{
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: SUCCESS Try to open config.xml");
// //success
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: SUCCESS Start Parse config.xml");
// pDvmConfigFile = dvmConfigFileParse(configFd);
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: SUCCESS Finish Parse config.xml");
// dvmConfigFileDebug(pDvmConfigFile);
// __android_log_print(ANDROID_LOG_DEBUG, "DVM DEBUG", "DvmDex.cpp: SUCCESS Finish Debug config.xml");
// }
////endsalma
if (gDvm.verifyDexChecksum)
parseFlags |= kDexParseVerifyChecksum;
if (lseek(fd, 0, SEEK_SET) < 0) {
ALOGE("lseek rewind failed");
goto bail;
}
if (sysMapFileInShmemWritableReadOnly(fd, &memMap) != 0) {
ALOGE("Unable to map file");
goto bail;
}
pDexFile = dexFileParse((u1*)memMap.addr, memMap.length, parseFlags);
if (pDexFile == NULL) {
ALOGE("DEX parse failed");
sysReleaseShmem(&memMap);
goto bail;
}
pDvmDex = allocateAuxStructures(pDexFile);
if (pDvmDex == NULL) {
dexFileFree(pDexFile);
sysReleaseShmem(&memMap);
goto bail;
}
/* tuck this into the DexFile so it gets released later */
sysCopyMap(&pDvmDex->memMap, &memMap);
pDvmDex->isMappedReadOnly = true;
*ppDvmDex = pDvmDex;
result = 0;
bail:
return result;
}