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
TEST(liblog,__android_log_write__android_logger_list_read)31 TEST(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
TEST(liblog,android_logger_get_)79 TEST(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