Alan Stokes | 64acdf7 | 2017-08-01 16:43:02 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013-2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <sys/types.h> |
| 18 | #include <time.h> |
| 19 | #include <unistd.h> |
| 20 | |
| 21 | #include <string> |
| 22 | |
| 23 | #include <android-base/chrono_utils.h> |
| 24 | #include <android-base/stringprintf.h> |
| 25 | #include <android/log.h> // minimal logging API |
| 26 | #include <gtest/gtest.h> |
| 27 | #include <log/log_properties.h> |
| 28 | #include <log/log_read.h> |
| 29 | #include <log/log_time.h> |
| 30 | #include <log/log_transport.h> |
| 31 | |
| 32 | #ifdef __ANDROID__ |
| 33 | static void read_with_wrap() { |
| 34 | android_set_log_transport(LOGGER_LOGD); |
| 35 | |
| 36 | // Read the last line in the log to get a starting timestamp. We're assuming |
| 37 | // the log is not empty. |
| 38 | const int mode = ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK; |
| 39 | struct logger_list* logger_list = |
| 40 | android_logger_list_open(LOG_ID_MAIN, mode, 1000, 0); |
| 41 | |
| 42 | ASSERT_NE(logger_list, nullptr); |
| 43 | |
| 44 | log_msg log_msg; |
| 45 | int ret = android_logger_list_read(logger_list, &log_msg); |
| 46 | android_logger_list_close(logger_list); |
| 47 | ASSERT_GT(ret, 0); |
| 48 | |
| 49 | log_time start(log_msg.entry.sec, log_msg.entry.nsec); |
| 50 | ASSERT_NE(start, log_time()); |
| 51 | |
| 52 | logger_list = |
| 53 | android_logger_list_alloc_time(mode | ANDROID_LOG_WRAP, start, 0); |
| 54 | ASSERT_NE(logger_list, nullptr); |
| 55 | |
| 56 | struct logger* logger = android_logger_open(logger_list, LOG_ID_MAIN); |
| 57 | EXPECT_NE(logger, nullptr); |
| 58 | if (logger) { |
| 59 | android_logger_list_read(logger_list, &log_msg); |
| 60 | } |
| 61 | |
| 62 | android_logger_list_close(logger_list); |
| 63 | } |
| 64 | |
| 65 | static void caught_signal(int /* signum */) { |
| 66 | } |
| 67 | #endif |
| 68 | |
| 69 | // b/64143705 confirm fixed |
| 70 | TEST(liblog, wrap_mode_blocks) { |
| 71 | #ifdef __ANDROID__ |
| 72 | |
| 73 | android::base::Timer timer; |
| 74 | |
| 75 | // The read call is expected to take up to 2 hours in the happy case. |
| 76 | // We only want to make sure it waits for longer than 30s, but we can't |
| 77 | // use an alarm as the implementation uses it. So we run the test in |
| 78 | // a separate process. |
| 79 | pid_t pid = fork(); |
| 80 | |
| 81 | if (pid == 0) { |
| 82 | // child |
| 83 | read_with_wrap(); |
| 84 | _exit(0); |
| 85 | } |
| 86 | |
| 87 | struct sigaction ignore, old_sigaction; |
| 88 | memset(&ignore, 0, sizeof(ignore)); |
| 89 | ignore.sa_handler = caught_signal; |
| 90 | sigemptyset(&ignore.sa_mask); |
| 91 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 92 | alarm(45); |
| 93 | |
| 94 | bool killed = false; |
| 95 | for (;;) { |
| 96 | siginfo_t info = {}; |
| 97 | // This wait will succeed if the child exits, or fail with EINTR if the |
| 98 | // alarm goes off first - a loose approximation to a timed wait. |
| 99 | int ret = waitid(P_PID, pid, &info, WEXITED); |
| 100 | if (ret >= 0 || errno != EINTR) { |
| 101 | EXPECT_EQ(ret, 0); |
| 102 | if (!killed) { |
| 103 | EXPECT_EQ(info.si_status, 0); |
| 104 | } |
| 105 | break; |
| 106 | } |
| 107 | unsigned int alarm_left = alarm(0); |
| 108 | if (alarm_left > 0) { |
| 109 | alarm(alarm_left); |
| 110 | } else { |
| 111 | kill(pid, SIGTERM); |
| 112 | killed = true; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | alarm(0); |
| 117 | EXPECT_GT(timer.duration(), std::chrono::seconds(40)); |
| 118 | #else |
| 119 | GTEST_LOG_(INFO) << "This test does nothing.\n"; |
| 120 | #endif |
| 121 | } |