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 #include <private/android_logger.h>
31
TEST(liblog,__android_log_write__android_logger_list_read)32 TEST(liblog, __android_log_write__android_logger_list_read) {
33 #ifdef __ANDROID__
34 pid_t pid = getpid();
35
36 struct logger_list* logger_list;
37 ASSERT_TRUE(
38 NULL !=
39 (logger_list = android_logger_list_open(
40 LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
41
42 struct timespec ts;
43 clock_gettime(CLOCK_MONOTONIC, &ts);
44 std::string buf = android::base::StringPrintf("pid=%u ts=%ld.%09ld", pid,
45 ts.tv_sec, ts.tv_nsec);
46 static const char tag[] =
47 "liblog.__android_log_write__android_logger_list_read";
48 static const char prio = ANDROID_LOG_DEBUG;
49 ASSERT_LT(0, __android_log_write(prio, tag, buf.c_str()));
50 usleep(1000000);
51
52 buf = std::string(&prio, sizeof(prio)) + tag + std::string("", 1) + buf +
53 std::string("", 1);
54
55 int count = 0;
56
57 for (;;) {
58 log_msg log_msg;
59 if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
60
61 EXPECT_EQ(log_msg.entry.pid, pid);
62 // There may be a future where we leak "liblog" tagged LOG_ID_EVENT
63 // binary messages through so that logger losses can be correlated?
64 EXPECT_EQ(log_msg.id(), LOG_ID_MAIN);
65
66 if (log_msg.entry.len != buf.length()) continue;
67
68 if (buf != std::string(log_msg.msg(), log_msg.entry.len)) continue;
69
70 ++count;
71 }
72 android_logger_list_close(logger_list);
73
74 EXPECT_EQ(1, count);
75 #else
76 GTEST_LOG_(INFO) << "This test does nothing.\n";
77 #endif
78 }
79
TEST(liblog,android_logger_get_)80 TEST(liblog, android_logger_get_) {
81 #ifdef __ANDROID__
82 // This test assumes the log buffers are filled with noise from
83 // normal operations. It will fail if done immediately after a
84 // logcat -c.
85 struct logger_list* logger_list =
86 android_logger_list_alloc(ANDROID_LOG_WRONLY, 0, 0);
87
88 for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
89 log_id_t id = static_cast<log_id_t>(i);
90 const char* name = android_log_id_to_name(id);
91 if (id != android_name_to_log_id(name)) {
92 continue;
93 }
94 fprintf(stderr, "log buffer %s\r", name);
95 struct logger* logger;
96 EXPECT_TRUE(NULL != (logger = android_logger_open(logger_list, id)));
97 EXPECT_EQ(id, android_logger_get_id(logger));
98 ssize_t get_log_size = android_logger_get_log_size(logger);
99 /* security buffer is allowed to be denied */
100 if (strcmp("security", name)) {
101 EXPECT_LT(0, get_log_size);
102 // crash buffer is allowed to be empty, that is actually healthy!
103 // kernel buffer is allowed to be empty on "user" builds
104 // stats buffer is allowed to be empty TEMPORARILY.
105 // TODO: remove stats buffer from here once we start to use it in
106 // framework (b/68266385).
107 EXPECT_LE( // boolean 1 or 0 depending on expected content or empty
108 !!((strcmp("crash", name) != 0) &&
109 ((strcmp("kernel", name) != 0) ||
110 __android_logger_property_get_bool(
111 "ro.logd.kernel", BOOL_DEFAULT_TRUE | BOOL_DEFAULT_FLAG_ENG |
112 BOOL_DEFAULT_FLAG_SVELTE)) &&
113 (strcmp("stats", name) != 0)),
114 android_logger_get_log_readable_size(logger));
115 } else {
116 EXPECT_NE(0, get_log_size);
117 if (get_log_size < 0) {
118 EXPECT_GT(0, android_logger_get_log_readable_size(logger));
119 } else {
120 EXPECT_LE(0, android_logger_get_log_readable_size(logger));
121 }
122 }
123 EXPECT_LT(0, android_logger_get_log_version(logger));
124 }
125
126 android_logger_list_close(logger_list);
127 #else
128 GTEST_LOG_(INFO) << "This test does nothing.\n";
129 #endif
130 }
131