Esempio n. 1
0
/*
 * static void dumpHprofData(String fileName, FileDescriptor fd)
 *
 * Cause "hprof" data to be dumped.  We can throw an IOException if an
 * error occurs during file handling.
 */
static void Dalvik_dalvik_system_VMDebug_dumpHprofData(const u4* args,
    JValue* pResult)
{
#ifdef WITH_HPROF
    StringObject* fileNameStr = (StringObject*) args[0];
    Object* fileDescriptor = (Object*) args[1];
    char* fileName;
    int result;

    /*
     * Only one of these may be NULL.
     */
    if (fileNameStr == NULL && fileDescriptor == NULL) {
        dvmThrowException("Ljava/lang/NullPointerException;", NULL);
        RETURN_VOID();
    }

    if (fileNameStr != NULL) {
        fileName = dvmCreateCstrFromString(fileNameStr);
        if (fileName == NULL) {
            /* unexpected -- malloc failure? */
            dvmThrowException("Ljava/lang/RuntimeException;", "malloc failure?");
            RETURN_VOID();
        }
    } else {
        fileName = strdup("[fd]");
    }

    int fd = -1;
    if (fileDescriptor != NULL) {
        fd = getFileDescriptor(fileDescriptor);
        if (fd < 0)
            RETURN_VOID();
    }

    result = hprofDumpHeap(fileName, fd, false);
    free(fileName);

    if (result != 0) {
        /* ideally we'd throw something more specific based on actual failure */
        dvmThrowException("Ljava/lang/RuntimeException;",
            "Failure during heap dump -- check log output for details");
        RETURN_VOID();
    }
#else
    dvmThrowException("Ljava/lang/UnsupportedOperationException;", NULL);
#endif

    RETURN_VOID();
}
/*
 * static void dumpHprofDataDdms()
 *
 * Cause "hprof" data to be computed and sent directly to DDMS.
 */
static void Dalvik_dalvik_system_VMDebug_dumpHprofDataDdms(const u4* args,
    JValue* pResult)
{
    int result;

    result = hprofDumpHeap("[DDMS]", -1, true);

    if (result != 0) {
        /* ideally we'd throw something more specific based on actual failure */
        dvmThrowRuntimeException(
            "Failure during heap dump; check log output for details");
        RETURN_VOID();
    }

    RETURN_VOID();
}
Esempio n. 3
0
/*
 * static void dumpHprofDataDdms()
 *
 * Cause "hprof" data to be computed and sent directly to DDMS.
 */
static void Dalvik_dalvik_system_VMDebug_dumpHprofDataDdms(const u4* args,
    JValue* pResult)
{
#ifdef WITH_HPROF
    int result;

    result = hprofDumpHeap("[DDMS]", -1, true);

    if (result != 0) {
        /* ideally we'd throw something more specific based on actual failure */
        dvmThrowException("Ljava/lang/RuntimeException;",
            "Failure during heap dump -- check log output for details");
        RETURN_VOID();
    }
#else
    dvmThrowException("Ljava/lang/UnsupportedOperationException;", NULL);
#endif

    RETURN_VOID();
}
/*
 * Sleep in sigwait() until a signal arrives.
 */
static void* signalCatcherThreadStart(void* arg)
{
    Thread* self = dvmThreadSelf();
    sigset_t mask;
    int cc;

    UNUSED_PARAMETER(arg);

    LOGV("Signal catcher thread started (threadid=%d)\n", self->threadId);

    /* set up mask with signals we want to handle */
    sigemptyset(&mask);
    sigaddset(&mask, SIGQUIT);
    sigaddset(&mask, SIGUSR1);

    while (true) {
        int rcvd;

        dvmChangeStatus(self, THREAD_VMWAIT);

        /*
         * Signals for sigwait() must be blocked but not ignored.  We
         * block signals like SIGQUIT for all threads, so the condition
         * is met.  When the signal hits, we wake up, without any signal
         * handlers being invoked.
         *
         * We want to suspend all other threads, so that it's safe to
         * traverse their stacks.
         *
         * When running under GDB we occasionally return with EINTR (e.g.
         * when other threads exit).
         */
loop:
        cc = sigwait(&mask, &rcvd);
        if (cc != 0) {
            if (cc == EINTR) {
                //LOGV("sigwait: EINTR\n");
                goto loop;
            }
            assert(!"bad result from sigwait");
        }

        if (!gDvm.haltSignalCatcher) {
            LOGI("threadid=%d: reacting to signal %d\n",
                dvmThreadSelf()->threadId, rcvd);
        }

        /* set our status to RUNNING, self-suspending if GC in progress */
        dvmChangeStatus(self, THREAD_RUNNING);

        if (gDvm.haltSignalCatcher)
            break;

        if (rcvd == SIGQUIT) {
            dvmSuspendAllThreads(SUSPEND_FOR_STACK_DUMP);
            dvmDumpLoaderStats("sig");

            logThreadStacks();

            if (false) {
                dvmLockMutex(&gDvm.jniGlobalRefLock);
                dvmDumpReferenceTable(&gDvm.jniGlobalRefTable, "JNI global");
                dvmUnlockMutex(&gDvm.jniGlobalRefLock);
            }

            //dvmDumpTrackedAllocations(true);
            dvmResumeAllThreads(SUSPEND_FOR_STACK_DUMP);
        } else if (rcvd == SIGUSR1) {
#if WITH_HPROF
            LOGI("SIGUSR1 forcing GC and HPROF dump\n");
            hprofDumpHeap(NULL);
#else
            LOGI("SIGUSR1 forcing GC (no HPROF)\n");
            dvmCollectGarbage(false);
#endif
        } else {
            LOGE("unexpected signal %d\n", rcvd);
        }
    }

    return NULL;
}