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 <iostream>
20 #include <limits>
21 #include <sstream>
22
23 #include "aborting.h"
24
25 // Headers for LogMessage::LogLine.
26 #ifdef ART_TARGET_ANDROID
27 #include <log/log.h>
28 #else
29 #include <sys/types.h>
30 #include <unistd.h>
31 #endif
32
33 namespace art {
34
35 LogVerbosity gLogVerbosity;
36
37 std::atomic<unsigned int> gAborting(0);
38
39 static std::unique_ptr<std::string> gCmdLine;
40 static std::unique_ptr<std::string> gProgramInvocationName;
41 static std::unique_ptr<std::string> gProgramInvocationShortName;
42
GetCmdLine()43 const char* GetCmdLine() {
44 return (gCmdLine.get() != nullptr) ? gCmdLine->c_str() : nullptr;
45 }
46
ProgramInvocationName()47 const char* ProgramInvocationName() {
48 return (gProgramInvocationName.get() != nullptr) ? gProgramInvocationName->c_str() : "art";
49 }
50
ProgramInvocationShortName()51 const char* ProgramInvocationShortName() {
52 return (gProgramInvocationShortName.get() != nullptr) ? gProgramInvocationShortName->c_str()
53 : "art";
54 }
55
InitLogging(char * argv[],AbortFunction & abort_function)56 void InitLogging(char* argv[], AbortFunction& abort_function) {
57 if (gCmdLine.get() != nullptr) {
58 return;
59 }
60
61 // Stash the command line for later use. We can use /proc/self/cmdline on Linux to recover this,
62 // but we don't have that luxury on the Mac, and there are a couple of argv[0] variants that are
63 // commonly used.
64 if (argv != nullptr) {
65 gCmdLine.reset(new std::string(argv[0]));
66 for (size_t i = 1; argv[i] != nullptr; ++i) {
67 gCmdLine->append(" ");
68 gCmdLine->append(argv[i]);
69 }
70 gProgramInvocationName.reset(new std::string(argv[0]));
71 const char* last_slash = strrchr(argv[0], '/');
72 gProgramInvocationShortName.reset(new std::string((last_slash != nullptr) ? last_slash + 1
73 : argv[0]));
74 } else {
75 // TODO: fall back to /proc/self/cmdline when argv is null on Linux.
76 gCmdLine.reset(new std::string("<unset>"));
77 }
78
79 #ifdef ART_TARGET_ANDROID
80 #define INIT_LOGGING_DEFAULT_LOGGER android::base::LogdLogger()
81 #else
82 #define INIT_LOGGING_DEFAULT_LOGGER android::base::StderrLogger
83 #endif
84 android::base::InitLogging(argv, INIT_LOGGING_DEFAULT_LOGGER,
85 std::move<AbortFunction>(abort_function));
86 #undef INIT_LOGGING_DEFAULT_LOGGER
87 }
88
89 #ifdef ART_TARGET_ANDROID
90 static const android_LogPriority kLogSeverityToAndroidLogPriority[] = {
91 ANDROID_LOG_VERBOSE, ANDROID_LOG_DEBUG, ANDROID_LOG_INFO, ANDROID_LOG_WARN,
92 ANDROID_LOG_ERROR, ANDROID_LOG_FATAL, ANDROID_LOG_FATAL
93 };
94 static_assert(arraysize(kLogSeverityToAndroidLogPriority) == ::android::base::FATAL + 1,
95 "Mismatch in size of kLogSeverityToAndroidLogPriority and values in LogSeverity");
96 #endif
97
LogLineLowStack(const char * file,unsigned int line,LogSeverity log_severity,const char * message)98 void LogHelper::LogLineLowStack(const char* file,
99 unsigned int line,
100 LogSeverity log_severity,
101 const char* message) {
102 #ifdef ART_TARGET_ANDROID
103 // Use android_writeLog() to avoid stack-based buffers used by android_printLog().
104 const char* tag = ProgramInvocationShortName();
105 int priority = kLogSeverityToAndroidLogPriority[static_cast<size_t>(log_severity)];
106 char* buf = nullptr;
107 size_t buf_size = 0u;
108 if (priority == ANDROID_LOG_FATAL) {
109 // Allocate buffer for snprintf(buf, buf_size, "%s:%u] %s", file, line, message) below.
110 // If allocation fails, fall back to printing only the message.
111 buf_size = strlen(file) + 1 /* ':' */ + std::numeric_limits<decltype(line)>::max_digits10 +
112 2 /* "] " */ + strlen(message) + 1 /* terminating 0 */;
113 buf = reinterpret_cast<char*>(malloc(buf_size));
114 }
115 if (buf != nullptr) {
116 snprintf(buf, buf_size, "%s:%u] %s", file, line, message);
117 android_writeLog(priority, tag, buf);
118 free(buf);
119 } else {
120 android_writeLog(priority, tag, message);
121 }
122 #else
123 static constexpr char kLogCharacters[] = { 'V', 'D', 'I', 'W', 'E', 'F', 'F' };
124 static_assert(
125 arraysize(kLogCharacters) == static_cast<size_t>(::android::base::FATAL) + 1,
126 "Wrong character array size");
127
128 const char* program_name = ProgramInvocationShortName();
129 TEMP_FAILURE_RETRY(write(STDERR_FILENO, program_name, strlen(program_name)));
130 TEMP_FAILURE_RETRY(write(STDERR_FILENO, " ", 1));
131 TEMP_FAILURE_RETRY(write(STDERR_FILENO, &kLogCharacters[static_cast<size_t>(log_severity)], 1));
132 TEMP_FAILURE_RETRY(write(STDERR_FILENO, " ", 1));
133 // TODO: pid and tid.
134 TEMP_FAILURE_RETRY(write(STDERR_FILENO, file, strlen(file)));
135 // TODO: line.
136 UNUSED(line);
137 TEMP_FAILURE_RETRY(write(STDERR_FILENO, "] ", 2));
138 TEMP_FAILURE_RETRY(write(STDERR_FILENO, message, strlen(message)));
139 TEMP_FAILURE_RETRY(write(STDERR_FILENO, "\n", 1));
140 #endif // ART_TARGET_ANDROID
141 }
142
143 } // namespace art
144