Beispiel #1
0
/*
 * Open a Jar file.  It's okay if it's just a Zip archive without all of
 * the Jar trimmings, but we do insist on finding "classes.dex" inside
 * or an appropriately-named ".odex" file alongside.
 *
 * If "isBootstrap" is not set, the optimizer/verifier regards this DEX as
 * being part of a different class loader.
 */
int dvmJarFileOpen(const char* fileName, const char* odexOutputName,
    JarFile** ppJarFile, bool isBootstrap)
{
    /*
     * TODO: This function has been duplicated and modified to become
     * dvmRawDexFileOpen() in RawDexFile.c. This should be refactored.
     */

    ZipArchive archive;
    DvmDex* pDvmDex = NULL;
    char* cachedName = NULL;
    bool archiveOpen = false;
    bool locked = false;
    int fd = -1;
    int result = -1;

    /* Even if we're not going to look at the archive, we need to
     * open it so we can stuff it into ppJarFile.
     */
    if (dexZipOpenArchive(fileName, &archive) != 0)
        goto bail;
    archiveOpen = true;

    /* If we fork/exec into dexopt, don't let it inherit the archive's fd.
     */
    dvmSetCloseOnExec(dexZipGetArchiveFd(&archive));

    /* First, look for a ".odex" alongside the jar file.  It will
     * have the same name/path except for the extension.
     */
    fd = openAlternateSuffix(fileName, "odex", O_RDONLY, &cachedName);
    if (fd >= 0) {
        ALOGV("Using alternate file (odex) for %s ...", fileName);
        if (!dvmCheckOptHeaderAndDependencies(fd, false, 0, 0, true, true)) {
            ALOGE("%s odex has stale dependencies", fileName);
            free(cachedName);
            cachedName = NULL;
            close(fd);
            fd = -1;
            goto tryArchive;
        } else {
            ALOGV("%s odex has good dependencies", fileName);
            //TODO: make sure that the .odex actually corresponds
            //      to the classes.dex inside the archive (if present).
            //      For typical use there will be no classes.dex.
        }
    } else {
        ZipEntry entry;

tryArchive:
        /*
         * Pre-created .odex absent or stale.  Look inside the jar for a
         * "classes.dex".
         */
        entry = dexZipFindEntry(&archive, kDexInJarName);
        if (entry != NULL) {
            bool newFile = false;

            /*
             * We've found the one we want.  See if there's an up-to-date copy
             * in the cache.
             *
             * On return, "fd" will be seeked just past the "opt" header.
             *
             * If a stale .odex file is present and classes.dex exists in
             * the archive, this will *not* return an fd pointing to the
             * .odex file; the fd will point into dalvik-cache like any
             * other jar.
             */
            if (odexOutputName == NULL) {
                cachedName = dexOptGenerateCacheFileName(fileName,
                                kDexInJarName);
                if (cachedName == NULL)
                    goto bail;
            } else {
                cachedName = strdup(odexOutputName);
            }
            ALOGV("dvmJarFileOpen: Checking cache for %s (%s)",
                fileName, cachedName);
            fd = dvmOpenCachedDexFile(fileName, cachedName,
                    dexGetZipEntryModTime(&archive, entry),
                    dexGetZipEntryCrc32(&archive, entry),
                    isBootstrap, &newFile, /*createIfMissing=*/true);
            if (fd < 0) {
                ALOGI("Unable to open or create cache for %s (%s)",
                    fileName, cachedName);
                goto bail;
            }
            locked = true;

            /*
             * If fd points to a new file (because there was no cached version,
             * or the cached version was stale), generate the optimized DEX.
             * The file descriptor returned is still locked, and is positioned
             * just past the optimization header.
             */
            if (newFile) {
                u8 startWhen, extractWhen, endWhen;
                bool result;
                off_t dexOffset;

                dexOffset = lseek(fd, 0, SEEK_CUR);
                result = (dexOffset > 0);

                if (result) {
                    startWhen = dvmGetRelativeTimeUsec();
                    result = dexZipExtractEntryToFile(&archive, entry, fd) == 0;
                    extractWhen = dvmGetRelativeTimeUsec();
                }
                if (result) {
                    result = dvmOptimizeDexFile(fd, dexOffset,
                                dexGetZipEntryUncompLen(&archive, entry),
                                fileName,
                                dexGetZipEntryModTime(&archive, entry),
                                dexGetZipEntryCrc32(&archive, entry),
                                isBootstrap);
                }

                if (!result) {
                    ALOGE("Unable to extract+optimize DEX from '%s'",
                        fileName);
                    goto bail;
                }

                endWhen = dvmGetRelativeTimeUsec();
                ALOGD("DEX prep '%s': unzip in %dms, rewrite %dms",
                    fileName,
                    (int) (extractWhen - startWhen) / 1000,
                    (int) (endWhen - extractWhen) / 1000);
            }
        } else {
            ALOGI("Zip is good, but no %s inside, and no valid .odex "
                    "file in the same directory", kDexInJarName);
            goto bail;
        }
    }

    /*
     * Map the cached version.  This immediately rewinds the fd, so it
     * doesn't have to be seeked anywhere in particular.
     */
    if (dvmDexFileOpenFromFd(fd, &pDvmDex) != 0) {
        ALOGI("Unable to map %s in %s", kDexInJarName, fileName);
        goto bail;
    }

    if (locked) {
        /* unlock the fd */
        if (!dvmUnlockCachedDexFile(fd)) {
            /* uh oh -- this process needs to exit or we'll wedge the system */
            ALOGE("Unable to unlock DEX file");
            goto bail;
        }
        locked = false;
    }

    ALOGV("Successfully opened '%s' in '%s'", kDexInJarName, fileName);

    *ppJarFile = (JarFile*) calloc(1, sizeof(JarFile));
    (*ppJarFile)->archive = archive;
    (*ppJarFile)->cacheFileName = cachedName;
    (*ppJarFile)->pDvmDex = pDvmDex;
    cachedName = NULL;      // don't free it below
    result = 0;

bail:
    /* clean up, closing the open file */
    if (archiveOpen && result != 0)
        dexZipCloseArchive(&archive);
    free(cachedName);
    if (fd >= 0) {
        if (locked)
            (void) dvmUnlockCachedDexFile(fd);
        close(fd);
    }
    return result;
}
Beispiel #2
0
/* See documentation comment in header. */
int dvmRawDexFileOpen(const char* fileName, const char* odexOutputName,
    RawDexFile** ppRawDexFile, bool isBootstrap)
{
    /*
     * TODO: This duplicates a lot of code from dvmJarFileOpen() in
     * JarFile.c. This should be refactored.
     */

    DvmDex* pDvmDex = NULL;
    char* cachedName = NULL;
    int result = -1;
    int dexFd = -1;
    int optFd = -1;
    u4 modTime = 0;
    u4 adler32 = 0;
    size_t fileSize = 0;
    bool newFile = false;
    bool locked = false;

    dexFd = open(fileName, O_RDONLY);
    if (dexFd < 0) goto bail;

    /* If we fork/exec into dexopt, don't let it inherit the open fd. */
    dvmSetCloseOnExec(dexFd);

    if (verifyMagicAndGetAdler32(dexFd, &adler32) < 0) {
        ALOGE("Error with header for %s", fileName);
        goto bail;
    }

    if (getModTimeAndSize(dexFd, &modTime, &fileSize) < 0) {
        ALOGE("Error with stat for %s", fileName);
        goto bail;
    }

    /*
     * See if the cached file matches. If so, optFd will become a reference
     * to the cached file and will have been seeked to just past the "opt"
     * header.
     */

    if (odexOutputName == NULL) {
        cachedName = dexOptGenerateCacheFileName(fileName, NULL);
        if (cachedName == NULL)
            goto bail;
    } else {
        cachedName = strdup(odexOutputName);
    }

    ALOGV("dvmRawDexFileOpen: Checking cache for %s (%s)",
            fileName, cachedName);

    optFd = dvmOpenCachedDexFile(fileName, cachedName, modTime,
        adler32, isBootstrap, &newFile, /*createIfMissing=*/true);

    if (optFd < 0) {
        ALOGI("Unable to open or create cache for %s (%s)",
                fileName, cachedName);
        goto bail;
    }
    locked = true;

    /*
     * If optFd points to a new file (because there was no cached
     * version, or the cached version was stale), generate the
     * optimized DEX. The file descriptor returned is still locked,
     * and is positioned just past the optimization header.
     */
    if (newFile) {
        u8 startWhen, copyWhen, endWhen;
        bool result;
        off_t dexOffset;

        dexOffset = lseek(optFd, 0, SEEK_CUR);
        result = (dexOffset > 0);

        if (result) {
            startWhen = dvmGetRelativeTimeUsec();
            result = copyFileToFile(optFd, dexFd, fileSize) == 0;
            copyWhen = dvmGetRelativeTimeUsec();
        }

        if (result) {
            result = dvmOptimizeDexFile(optFd, dexOffset, fileSize,
                fileName, modTime, adler32, isBootstrap);
        }

        if (!result) {
            ALOGE("Unable to extract+optimize DEX from '%s'", fileName);
            goto bail;
        }

        endWhen = dvmGetRelativeTimeUsec();
        ALOGD("DEX prep '%s': copy in %dms, rewrite %dms",
            fileName,
            (int) (copyWhen - startWhen) / 1000,
            (int) (endWhen - copyWhen) / 1000);
    }

    /*
     * Map the cached version.  This immediately rewinds the fd, so it
     * doesn't have to be seeked anywhere in particular.
     */
    if (dvmDexFileOpenFromFd(optFd, &pDvmDex) != 0) {
        ALOGI("Unable to map cached %s", fileName);
        goto bail;
    }

    if (locked) {
        /* unlock the fd */
        if (!dvmUnlockCachedDexFile(optFd)) {
            /* uh oh -- this process needs to exit or we'll wedge the system */
            ALOGE("Unable to unlock DEX file");
            goto bail;
        }
        locked = false;
    }

    ALOGV("Successfully opened '%s'", fileName);

    *ppRawDexFile = (RawDexFile*) calloc(1, sizeof(RawDexFile));
    (*ppRawDexFile)->cacheFileName = cachedName;
    (*ppRawDexFile)->pDvmDex = pDvmDex;
    cachedName = NULL;      // don't free it below
    result = 0;

bail:
    free(cachedName);
    if (dexFd >= 0) {
        close(dexFd);
    }
    if (optFd >= 0) {
        if (locked)
            (void) dvmUnlockCachedDexFile(optFd);
        close(optFd);
    }
    return result;
}
Beispiel #3
0
int dvmJarFileOpen(const char* fileName, const char* odexOutputName,
    JarFile** ppJarFile, bool isBootstrap)
{

    ZipArchive archive;
    DvmDex* pDvmDex = NULL;
    char* cachedName = NULL;
    bool archiveOpen = false;
    bool locked = false;
    int fd = -1;
    int result = -1;

    if (dexZipOpenArchive(fileName, &archive) != 0)
        goto bail;
    archiveOpen = true;

    dvmSetCloseOnExec(dexZipGetArchiveFd(&archive));

    fd = openAlternateSuffix(fileName, "odex", O_RDONLY, &cachedName);
    if (fd >= 0) {
        ALOGV("Using alternate file (odex) for %s ...", fileName);
        if (!dvmCheckOptHeaderAndDependencies(fd, false, 0, 0, true, true)) {
            ALOGE("%s odex has stale dependencies", fileName);
            free(cachedName);
            cachedName = NULL;
            close(fd);
            fd = -1;
            goto tryArchive;
        } else {
            ALOGV("%s odex has good dependencies", fileName);
        }
    } else {
        ZipEntry entry;

tryArchive:
        entry = dexZipFindEntry(&archive, kDexInJarName);
        if (entry != NULL) {
            bool newFile = false;

            if (odexOutputName == NULL) {
                cachedName = dexOptGenerateCacheFileName(fileName,
                                kDexInJarName);
                if (cachedName == NULL)
                    goto bail;
            } else {
                cachedName = strdup(odexOutputName);
            }
            ALOGV("dvmJarFileOpen: Checking cache for %s (%s)",
                fileName, cachedName);
            fd = dvmOpenCachedDexFile(fileName, cachedName,
                    dexGetZipEntryModTime(&archive, entry),
                    dexGetZipEntryCrc32(&archive, entry),
                    isBootstrap, &newFile, /*createIfMissing=*/true);
            if (fd < 0) {
                ALOGI("Unable to open or create cache for %s (%s)",
                    fileName, cachedName);
                goto bail;
            }
            locked = true;

            /*
            Generate the optimized DEX.
             */
            if (newFile) {
                u8 startWhen, extractWhen, endWhen;
                bool result;
                off_t dexOffset;

                dexOffset = lseek(fd, 0, SEEK_CUR);
                result = (dexOffset > 0);

                if (result) {
                    startWhen = dvmGetRelativeTimeUsec();
                    result = dexZipExtractEntryToFile(&archive, entry, fd) == 0;
                    extractWhen = dvmGetRelativeTimeUsec();
                }
                if (result) {
                    result = dvmOptimizeDexFile(fd, dexOffset,
                                dexGetZipEntryUncompLen(&archive, entry),
                                fileName,
                                dexGetZipEntryModTime(&archive, entry),
                                dexGetZipEntryCrc32(&archive, entry),
                                isBootstrap);
                }

                if (!result) {
                    ALOGE("Unable to extract+optimize DEX from '%s'",
                        fileName);
                    goto bail;
                }

                endWhen = dvmGetRelativeTimeUsec();
                ALOGD("DEX prep '%s': unzip in %dms, rewrite %dms",
                    fileName,
                    (int) (extractWhen - startWhen) / 1000,
                    (int) (endWhen - extractWhen) / 1000);
            }
        } else {
            ALOGI("Zip is good, but no %s inside, and no valid .odex "
                    "file in the same directory", kDexInJarName);
            goto bail;
        }
    }

    if (dvmDexFileOpenFromFd(fd, &pDvmDex) != 0) {
        ALOGI("Unable to map %s in %s", kDexInJarName, fileName);
        goto bail;
    }

    if (locked) {
        /* unlock the fd */
        if (!dvmUnlockCachedDexFile(fd)) {
            /* This process needs to exit or we'll wedge the system O_O */
            ALOGE("Unable to unlock DEX file");
            goto bail;
        }
        locked = false;
    }

    ALOGV("Successfully opened '%s' in '%s'", kDexInJarName, fileName);

    *ppJarFile = (JarFile*) calloc(1, sizeof(JarFile));
    (*ppJarFile)->archive = archive;
    (*ppJarFile)->cacheFileName = cachedName;
    (*ppJarFile)->pDvmDex = pDvmDex;
    cachedName = NULL;      // don't free it below
    result = 0;

bail:
    if (archiveOpen && result != 0)
        dexZipCloseArchive(&archive);
    free(cachedName);
    if (fd >= 0) {
        if (locked)
            (void) dvmUnlockCachedDexFile(fd);
        close(fd);
    }
    return result;
}