1 /*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "DataLog.h"
28
29 #if OS(POSIX)
30 #include <pthread.h>
31 #include <unistd.h>
32 #endif
33
34 #define DATA_LOG_TO_FILE 0
35
36 // Uncomment to force logging to the given file regardless of what the environment variable says. Note that
37 // we will append ".<pid>.txt" where <pid> is the PID.
38
39 // This path won't work on Windows, make sure to change to something like C:\\Users\\<more path>\\log.txt.
40 #define DATA_LOG_FILENAME "/tmp/WTFLog"
41
42 namespace WTF {
43
44 #if USE(PTHREADS)
45 static pthread_once_t initializeLogFileOnceKey = PTHREAD_ONCE_INIT;
46 #endif
47
48 static FilePrintStream* file;
49
initializeLogFileOnce()50 static void initializeLogFileOnce()
51 {
52 #if DATA_LOG_TO_FILE
53 #ifdef DATA_LOG_FILENAME
54 const char* filename = DATA_LOG_FILENAME;
55 #else
56 const char* filename = getenv("WTF_DATA_LOG_FILENAME");
57 #endif
58 char actualFilename[1024];
59
60 snprintf(actualFilename, sizeof(actualFilename), "%s.%d.txt", filename, getpid());
61
62 if (filename) {
63 file = FilePrintStream::open(actualFilename, "w").leakPtr();
64 if (!file)
65 fprintf(stderr, "Warning: Could not open log file %s for writing.\n", actualFilename);
66 }
67 #endif // DATA_LOG_TO_FILE
68 if (!file)
69 file = new FilePrintStream(stderr, FilePrintStream::Borrow);
70
71 setvbuf(file->file(), 0, _IONBF, 0); // Prefer unbuffered output, so that we get a full log upon crash or deadlock.
72 }
73
initializeLogFile()74 static void initializeLogFile()
75 {
76 #if USE(PTHREADS)
77 pthread_once(&initializeLogFileOnceKey, initializeLogFileOnce);
78 #else
79 if (!file)
80 initializeLogFileOnce();
81 #endif
82 }
83
dataFile()84 FilePrintStream& dataFile()
85 {
86 initializeLogFile();
87 return *file;
88 }
89
dataLogFV(const char * format,va_list argList)90 void dataLogFV(const char* format, va_list argList)
91 {
92 dataFile().vprintf(format, argList);
93 }
94
dataLogF(const char * format,...)95 void dataLogF(const char* format, ...)
96 {
97 va_list argList;
98 va_start(argList, format);
99 dataLogFV(format, argList);
100 va_end(argList);
101 }
102
dataLogFString(const char * str)103 void dataLogFString(const char* str)
104 {
105 dataFile().printf("%s", str);
106 }
107
108 } // namespace WTF
109
110