C++ (Cpp) caught_blocking_clear Examples

Example #1

File: logcat_test.cpp Project: Jendorski/platform_system_core

TEST(logcat, blocking_clear) {
    FILE *fp;
    unsigned long long v = 0xDEADBEEFA55C0000ULL;

    pid_t pid = getpid();

    v += pid & 0xFFFF;

    // This test is racey; an event occurs between clear and dump.
    // We accept that we will get a false positive, but never a false negative.
    ASSERT_TRUE(NULL != (fp = popen(
      "( trap exit HUP QUIT INT PIPE KILL ; sleep 6; echo DONE )&"
      " logcat -b events -c 2>&1 ;"
      " logcat -v brief -b events 2>&1",
      "r")));

    char buffer[5120];

    int count = 0;

    int signals = 0;

    signal(SIGALRM, caught_blocking_clear);
    alarm(2);
    while (fgets(buffer, sizeof(buffer), fp)) {

        if (!strncmp(buffer, "clearLog: ", 10)) {
            fprintf(stderr, "WARNING: Test lacks permission to run :-(\n");
            count = signals = 1;
            break;
        }

        if (!strncmp(buffer, "DONE", 4)) {
            break;
        }

        ++count;

        int p;
        unsigned long long l;

        if ((2 != sscanf(buffer, "I/[0] ( %u): %lld", &p, &l))
         || (p != pid)) {
            continue;
        }

        if (l == v) {
            if (count > 1) {
                fprintf(stderr, "WARNING: Possible false positive\n");
            }
            ++signals;
            break;
        }
    }
    alarm(0);
    signal(SIGALRM, SIG_DFL);

    // Generate SIGPIPE
    fclose(fp);
    caught_blocking_clear(0);

    pclose(fp);

    EXPECT_LE(1, count);

    EXPECT_EQ(1, signals);
}

Example #2

File: logcat_test.cpp Project: mnemonyc/platform_system_core

TEST(logcat, blocking_clear) {
    FILE *fp;
    unsigned long long v = 0xDEADBEEFA55C0000ULL;

    pid_t pid = getpid();

    v += pid & 0xFFFF;

    // This test is racey; an event occurs between clear and dump.
    // We accept that we will get a false positive, but never a false negative.
    ASSERT_TRUE(NULL != (fp = popen(
      "( trap exit HUP QUIT INT PIPE KILL ; sleep 6; echo DONE )&"
      " logcat -b events -c 2>&1 ;"
      " logcat -b events -g 2>&1 ;"
      " logcat -v brief -b events 2>&1",
      "r")));

    char buffer[BIG_BUFFER];

    int count = 0;
    int minus_g = 0;

    int signals = 0;

    signal(SIGALRM, caught_blocking_clear);
    alarm(2);
    while (fgets(buffer, sizeof(buffer), fp)) {

        if (!strncmp(buffer, "clearLog: ", 10)) {
            fprintf(stderr, "WARNING: Test lacks permission to run :-(\n");
            count = signals = 1;
            break;
        }

        if (!strncmp(buffer, "DONE", 4)) {
            break;
        }

        int size, consumed, max, payload;
        char size_mult[3], consumed_mult[3];
        size = consumed = max = payload = 0;
        if (6 == sscanf(buffer, "events: ring buffer is %d%2s (%d%2s consumed),"
                                " max entry is %db, max payload is %db",
                                &size, size_mult, &consumed, consumed_mult,
                                &max, &payload)) {
            long full_size = size, full_consumed = consumed;

            switch(size_mult[0]) {
            case 'G':
                full_size *= 1024;
                /* FALLTHRU */
            case 'M':
                full_size *= 1024;
                /* FALLTHRU */
            case 'K':
                full_size *= 1024;
                /* FALLTHRU */
            case 'b':
                break;
            }
            switch(consumed_mult[0]) {
            case 'G':
                full_consumed *= 1024;
                /* FALLTHRU */
            case 'M':
                full_consumed *= 1024;
                /* FALLTHRU */
            case 'K':
                full_consumed *= 1024;
                /* FALLTHRU */
            case 'b':
                break;
            }
            EXPECT_GT(full_size, full_consumed);
            EXPECT_GT(full_size, max);
            EXPECT_GT(max, payload);
            EXPECT_GT(max, full_consumed);

            ++minus_g;
            continue;
        }

        ++count;

        int p;
        unsigned long long l;

        if ((2 != sscanf(buffer, "I/[0] ( %u): %lld", &p, &l))
         || (p != pid)) {
            continue;
        }

        if (l == v) {
            if (count > 1) {
                fprintf(stderr, "WARNING: Possible false positive\n");
            }
            ++signals;
            break;
        }
    }
    alarm(0);
    signal(SIGALRM, SIG_DFL);

    // Generate SIGPIPE
    fclose(fp);
    caught_blocking_clear(0);

    pclose(fp);

    EXPECT_LE(1, count);
    EXPECT_EQ(1, minus_g);

    EXPECT_EQ(1, signals);
}