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/stringprintf.h>
24#include <android/log.h>  // minimal logging API
25#include <gtest/gtest.h>
26#include <log/log_properties.h>
27// Test the APIs in this standalone include file
28#include <log/log_read.h>
29// Do not use anything in log/log_time.h despite side effects of the above.
30
31TEST(liblog, __android_log_write__android_logger_list_read) {
32#ifdef __ANDROID__
33  pid_t pid = getpid();
34
35  struct logger_list* logger_list;
36  ASSERT_TRUE(
37      NULL !=
38      (logger_list = android_logger_list_open(
39           LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
40
41  struct timespec ts;
42  clock_gettime(CLOCK_MONOTONIC, &ts);
43  std::string buf = android::base::StringPrintf("pid=%u ts=%ld.%09ld", pid,
44                                                ts.tv_sec, ts.tv_nsec);
45  static const char tag[] =
46      "liblog.__android_log_write__android_logger_list_read";
47  static const char prio = ANDROID_LOG_DEBUG;
48  ASSERT_LT(0, __android_log_write(prio, tag, buf.c_str()));
49  usleep(1000000);
50
51  buf = std::string(&prio, sizeof(prio)) + tag + std::string("", 1) + buf +
52        std::string("", 1);
53
54  int count = 0;
55
56  for (;;) {
57    log_msg log_msg;
58    if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
59
60    EXPECT_EQ(log_msg.entry.pid, pid);
61    // There may be a future where we leak "liblog" tagged LOG_ID_EVENT
62    // binary messages through so that logger losses can be correlated?
63    EXPECT_EQ(log_msg.id(), LOG_ID_MAIN);
64
65    if (log_msg.entry.len != buf.length()) continue;
66
67    if (buf != std::string(log_msg.msg(), log_msg.entry.len)) continue;
68
69    ++count;
70  }
71  android_logger_list_close(logger_list);
72
73  EXPECT_EQ(1, count);
74#else
75  GTEST_LOG_(INFO) << "This test does nothing.\n";
76#endif
77}
78
79TEST(liblog, android_logger_get_) {
80#ifdef __ANDROID__
81  // This test assumes the log buffers are filled with noise from
82  // normal operations. It will fail if done immediately after a
83  // logcat -c.
84  struct logger_list* logger_list =
85      android_logger_list_alloc(ANDROID_LOG_WRONLY, 0, 0);
86
87  for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
88    log_id_t id = static_cast<log_id_t>(i);
89    const char* name = android_log_id_to_name(id);
90    if (id != android_name_to_log_id(name)) {
91      continue;
92    }
93    fprintf(stderr, "log buffer %s\r", name);
94    struct logger* logger;
95    EXPECT_TRUE(NULL != (logger = android_logger_open(logger_list, id)));
96    EXPECT_EQ(id, android_logger_get_id(logger));
97    ssize_t get_log_size = android_logger_get_log_size(logger);
98    /* security buffer is allowed to be denied */
99    if (strcmp("security", name)) {
100      EXPECT_LT(0, get_log_size);
101      // crash buffer is allowed to be empty, that is actually healthy!
102      // kernel buffer is allowed to be empty on "user" builds
103      EXPECT_LE(  // boolean 1 or 0 depending on expected content or empty
104          !!((strcmp("crash", name) != 0) &&
105             ((strcmp("kernel", name) != 0) || __android_log_is_debuggable())),
106          android_logger_get_log_readable_size(logger));
107    } else {
108      EXPECT_NE(0, get_log_size);
109      if (get_log_size < 0) {
110        EXPECT_GT(0, android_logger_get_log_readable_size(logger));
111      } else {
112        EXPECT_LE(0, android_logger_get_log_readable_size(logger));
113      }
114    }
115    EXPECT_LT(0, android_logger_get_log_version(logger));
116  }
117
118  android_logger_list_close(logger_list);
119#else
120  GTEST_LOG_(INFO) << "This test does nothing.\n";
121#endif
122}
123