1 /*
2 * Copyright (C) 2011 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 "logging.h"
18
19 #include "base/mutex.h"
20 #include "runtime.h"
21 #include "thread-inl.h"
22 #include "utils.h"
23
24 namespace art {
25
26 LogVerbosity gLogVerbosity;
27
28 std::vector<std::string> gVerboseMethods;
29
30 unsigned int gAborting = 0;
31
32 static LogSeverity gMinimumLogSeverity = INFO;
33 static std::unique_ptr<std::string> gCmdLine;
34 static std::unique_ptr<std::string> gProgramInvocationName;
35 static std::unique_ptr<std::string> gProgramInvocationShortName;
36
GetCmdLine()37 const char* GetCmdLine() {
38 return (gCmdLine.get() != nullptr) ? gCmdLine->c_str() : nullptr;
39 }
40
ProgramInvocationName()41 const char* ProgramInvocationName() {
42 return (gProgramInvocationName.get() != nullptr) ? gProgramInvocationName->c_str() : "art";
43 }
44
ProgramInvocationShortName()45 const char* ProgramInvocationShortName() {
46 return (gProgramInvocationShortName.get() != nullptr) ? gProgramInvocationShortName->c_str()
47 : "art";
48 }
49
50 // Configure logging based on ANDROID_LOG_TAGS environment variable.
51 // We need to parse a string that looks like
52 //
53 // *:v jdwp:d dalvikvm:d dalvikvm-gc:i dalvikvmi:i
54 //
55 // The tag (or '*' for the global level) comes first, followed by a colon
56 // and a letter indicating the minimum priority level we're expected to log.
57 // This can be used to reveal or conceal logs with specific tags.
InitLogging(char * argv[])58 void InitLogging(char* argv[]) {
59 if (gCmdLine.get() != nullptr) {
60 return;
61 }
62 // TODO: Move this to a more obvious InitART...
63 Locks::Init();
64
65 // Stash the command line for later use. We can use /proc/self/cmdline on Linux to recover this,
66 // but we don't have that luxury on the Mac, and there are a couple of argv[0] variants that are
67 // commonly used.
68 if (argv != NULL) {
69 gCmdLine.reset(new std::string(argv[0]));
70 for (size_t i = 1; argv[i] != NULL; ++i) {
71 gCmdLine->append(" ");
72 gCmdLine->append(argv[i]);
73 }
74 gProgramInvocationName.reset(new std::string(argv[0]));
75 const char* last_slash = strrchr(argv[0], '/');
76 gProgramInvocationShortName.reset(new std::string((last_slash != NULL) ? last_slash + 1
77 : argv[0]));
78 } else {
79 // TODO: fall back to /proc/self/cmdline when argv is NULL on Linux
80 gCmdLine.reset(new std::string("<unset>"));
81 }
82 const char* tags = getenv("ANDROID_LOG_TAGS");
83 if (tags == NULL) {
84 return;
85 }
86
87 std::vector<std::string> specs;
88 Split(tags, ' ', specs);
89 for (size_t i = 0; i < specs.size(); ++i) {
90 // "tag-pattern:[vdiwefs]"
91 std::string spec(specs[i]);
92 if (spec.size() == 3 && StartsWith(spec, "*:")) {
93 switch (spec[2]) {
94 case 'v':
95 gMinimumLogSeverity = VERBOSE;
96 continue;
97 case 'd':
98 gMinimumLogSeverity = DEBUG;
99 continue;
100 case 'i':
101 gMinimumLogSeverity = INFO;
102 continue;
103 case 'w':
104 gMinimumLogSeverity = WARNING;
105 continue;
106 case 'e':
107 gMinimumLogSeverity = ERROR;
108 continue;
109 case 'f':
110 gMinimumLogSeverity = FATAL;
111 continue;
112 // liblog will even suppress FATAL if you say 's' for silent, but that's crazy!
113 case 's':
114 gMinimumLogSeverity = FATAL;
115 continue;
116 }
117 }
118 LOG(FATAL) << "unsupported '" << spec << "' in ANDROID_LOG_TAGS (" << tags << ")";
119 }
120 }
121
LogMessageData(const char * file,int line,LogSeverity severity,int error)122 LogMessageData::LogMessageData(const char* file, int line, LogSeverity severity, int error)
123 : file(file),
124 line_number(line),
125 severity(severity),
126 error(error) {
127 const char* last_slash = strrchr(file, '/');
128 file = (last_slash == NULL) ? file : last_slash + 1;
129 }
130
~LogMessage()131 LogMessage::~LogMessage() {
132 if (data_->severity < gMinimumLogSeverity) {
133 return; // No need to format something we're not going to output.
134 }
135
136 // Finish constructing the message.
137 if (data_->error != -1) {
138 data_->buffer << ": " << strerror(data_->error);
139 }
140 std::string msg(data_->buffer.str());
141
142 // Do the actual logging with the lock held.
143 {
144 MutexLock mu(Thread::Current(), *Locks::logging_lock_);
145 if (msg.find('\n') == std::string::npos) {
146 LogLine(*data_, msg.c_str());
147 } else {
148 msg += '\n';
149 size_t i = 0;
150 while (i < msg.size()) {
151 size_t nl = msg.find('\n', i);
152 msg[nl] = '\0';
153 LogLine(*data_, &msg[i]);
154 i = nl + 1;
155 }
156 }
157 }
158
159 // Abort if necessary.
160 if (data_->severity == FATAL) {
161 Runtime::Abort();
162 }
163 }
164
165 } // namespace art
166