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 42namespace WTF { 43 44#if USE(PTHREADS) 45static pthread_once_t initializeLogFileOnceKey = PTHREAD_ONCE_INIT; 46#endif 47 48static FilePrintStream* file; 49 50static 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 74static void initializeLogFile() 75{ 76#if USE(PTHREADS) 77 pthread_once(&initializeLogFileOnceKey, initializeLogFileOnce); 78#else 79 if (!file) 80 initializeLogFileOnce(); 81#endif 82} 83 84FilePrintStream& dataFile() 85{ 86 initializeLogFile(); 87 return *file; 88} 89 90void dataLogFV(const char* format, va_list argList) 91{ 92 dataFile().vprintf(format, argList); 93} 94 95void dataLogF(const char* format, ...) 96{ 97 va_list argList; 98 va_start(argList, format); 99 dataLogFV(format, argList); 100 va_end(argList); 101} 102 103void dataLogFString(const char* str) 104{ 105 dataFile().printf("%s", str); 106} 107 108} // namespace WTF 109 110