1 /*
2 * Copyright (C) 2015 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 "sysdeps.h"
18 #include "adb_trace.h"
19
20 #include <string>
21 #include <unordered_map>
22 #include <vector>
23
24 #include <android-base/logging.h>
25 #include <android-base/strings.h>
26
27 #include "adb.h"
28
29 #if !ADB_HOST
30 #include <cutils/properties.h>
31 #endif
32
33 #if !ADB_HOST
34 const char* adb_device_banner = "device";
35 static android::base::LogdLogger gLogdLogger;
36 #else
37 const char* adb_device_banner = "host";
38 #endif
39
AdbLogger(android::base::LogId id,android::base::LogSeverity severity,const char * tag,const char * file,unsigned int line,const char * message)40 void AdbLogger(android::base::LogId id, android::base::LogSeverity severity,
41 const char* tag, const char* file, unsigned int line,
42 const char* message) {
43 android::base::StderrLogger(id, severity, tag, file, line, message);
44 #if !ADB_HOST
45 gLogdLogger(id, severity, tag, file, line, message);
46 #endif
47 }
48
49
50 #if !ADB_HOST
get_log_file_name()51 static std::string get_log_file_name() {
52 struct tm now;
53 time_t t;
54 tzset();
55 time(&t);
56 localtime_r(&t, &now);
57
58 char timestamp[PATH_MAX];
59 strftime(timestamp, sizeof(timestamp), "%Y-%m-%d-%H-%M-%S", &now);
60
61 return android::base::StringPrintf("/data/adb/adb-%s-%d", timestamp,
62 getpid());
63 }
64
start_device_log(void)65 void start_device_log(void) {
66 int fd = unix_open(get_log_file_name().c_str(),
67 O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0640);
68 if (fd == -1) {
69 return;
70 }
71
72 // Redirect stdout and stderr to the log file.
73 dup2(fd, STDOUT_FILENO);
74 dup2(fd, STDERR_FILENO);
75 fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid());
76 unix_close(fd);
77 }
78 #endif
79
80 int adb_trace_mask;
81
get_trace_setting_from_env()82 std::string get_trace_setting_from_env() {
83 const char* setting = getenv("ADB_TRACE");
84 if (setting == nullptr) {
85 setting = "";
86 }
87
88 return std::string(setting);
89 }
90
91 #if !ADB_HOST
get_trace_setting_from_prop()92 std::string get_trace_setting_from_prop() {
93 char buf[PROPERTY_VALUE_MAX];
94 property_get("persist.adb.trace_mask", buf, "");
95 return std::string(buf);
96 }
97 #endif
98
get_trace_setting()99 std::string get_trace_setting() {
100 #if ADB_HOST
101 return get_trace_setting_from_env();
102 #else
103 return get_trace_setting_from_prop();
104 #endif
105 }
106
107 // Split the space separated list of tags from the trace setting and build the
108 // trace mask from it. note that '1' and 'all' are special cases to enable all
109 // tracing.
110 //
111 // adb's trace setting comes from the ADB_TRACE environment variable, whereas
112 // adbd's comes from the system property persist.adb.trace_mask.
setup_trace_mask()113 static void setup_trace_mask() {
114 const std::string trace_setting = get_trace_setting();
115 if (trace_setting.empty()) {
116 return;
117 }
118
119 std::unordered_map<std::string, int> trace_flags = {
120 {"1", 0},
121 {"all", 0},
122 {"adb", ADB},
123 {"sockets", SOCKETS},
124 {"packets", PACKETS},
125 {"rwx", RWX},
126 {"usb", USB},
127 {"sync", SYNC},
128 {"sysdeps", SYSDEPS},
129 {"transport", TRANSPORT},
130 {"jdwp", JDWP},
131 {"services", SERVICES},
132 {"auth", AUTH},
133 {"fdevent", FDEVENT},
134 {"shell", SHELL}};
135
136 std::vector<std::string> elements = android::base::Split(trace_setting, " ");
137 for (const auto& elem : elements) {
138 const auto& flag = trace_flags.find(elem);
139 if (flag == trace_flags.end()) {
140 LOG(ERROR) << "Unknown trace flag: " << elem;
141 continue;
142 }
143
144 if (flag->second == 0) {
145 // 0 is used for the special values "1" and "all" that enable all
146 // tracing.
147 adb_trace_mask = ~0;
148 return;
149 } else {
150 adb_trace_mask |= 1 << flag->second;
151 }
152 }
153 }
154
adb_trace_init(char ** argv)155 void adb_trace_init(char** argv) {
156 #if !ADB_HOST
157 // Don't open log file if no tracing, since this will block
158 // the crypto unmount of /data
159 if (!get_trace_setting().empty()) {
160 if (unix_isatty(STDOUT_FILENO) == 0) {
161 start_device_log();
162 }
163 }
164 #endif
165
166 android::base::InitLogging(argv, &AdbLogger);
167 setup_trace_mask();
168
169 VLOG(ADB) << adb_version();
170 }
171
adb_trace_enable(AdbTrace trace_tag)172 void adb_trace_enable(AdbTrace trace_tag) {
173 adb_trace_mask |= (1 << trace_tag);
174 }
175