C++ (Cpp) caught_blocking_tail示例

示例#1

文件： logcat_test.cpp 项目： HyominYang/platform_system_core

TEST(logcat, blocking_tail) {
    FILE *fp;
    unsigned long long v = 0xA55ADEADBEEF0000ULL;

    pid_t pid = getpid();

    v += pid & 0xFFFF;

    ASSERT_EQ(0, NULL == (fp = popen(
      "( trap exit HUP QUIT INT PIPE KILL ; sleep 6; echo DONE )&"
      " logcat -b events -T 5 2>&1",
      "r")));

    char buffer[5120];

    int count = 0;

    int signals = 0;

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

        ++count;

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

        int p;
        unsigned long long l;

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

        if (l == v) {
            if (count >= 5) {
                ++signals;
            }
            break;
        }
    }
    alarm(0);
    signal(SIGALRM, SIG_DFL);

    /* Generate SIGPIPE */
    fclose(fp);
    caught_blocking_tail(0);

    pclose(fp);

    ASSERT_LT(5, count);

    ASSERT_EQ(1, signals);
}

示例#2

文件： logcat_test.cpp 项目： Jendorski/platform_system_core

TEST(logcat, blocking_tail) {
    FILE *fp;
    unsigned long long v = 0xA55FDEADBEEF0000ULL;

    pid_t pid = getpid();

    v += pid & 0xFFFF;

    LOG_FAILURE_RETRY(__android_log_btwrite(0, EVENT_TYPE_LONG, &v, sizeof(v)));

    v &= 0xFFFAFFFFFFFFFFFFULL;

    ASSERT_TRUE(NULL != (fp = popen(
      "( trap exit HUP QUIT INT PIPE KILL ; sleep 6; echo DONE )&"
      " logcat -v brief -b events -T 5 2>&1",
      "r")));

    char buffer[5120];

    int count = 0;

    int signals = 0;

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

        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 >= 5) {
                ++signals;
            }
            break;
        }
    }
    alarm(0);
    signal(SIGALRM, SIG_DFL);

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

    pclose(fp);

    EXPECT_LE(2, count);

    EXPECT_EQ(1, signals);
}