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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DataLog.h"
#include <stdarg.h>
#include <string.h>
#include <wtf/FilePrintStream.h>
#include <wtf/LockedPrintStream.h>
#include <wtf/Threading.h>
#include <mutex>
#include <thread>
#if OS(UNIX) || OS(DARWIN)
#include <unistd.h>
#endif
#define DATA_LOG_TO_FILE 0
// Set to 1 to use the temp directory from confstr instead of hardcoded directory.
// The last component of DATA_LOG_FILENAME will still be used.
#define DATA_LOG_TO_DARWIN_TEMP_DIR 0
// Uncomment to force logging to the given file regardless of what the environment variable says.
// Note that we will append ".<pid>.txt" where <pid> is the PID.
// This path won't work on Windows, make sure to change to something like C:\\Users\\<more path>\\log.txt.
#define DATA_LOG_FILENAME "/tmp/WTFLog"
namespace WTF {
static PrintStream* s_file;
static uint64_t s_fileData[(sizeof(FilePrintStream) + 7) / 8];
static uint64_t s_lockedFileData[(sizeof(LockedPrintStream) + 7) / 8];
static void initializeLogFileOnce()
{
FilePrintStream* file = nullptr;
#if DATA_LOG_TO_FILE
const long maxPathLength = 1024;
char filenameSuffix[maxPathLength + 1];
#if PLATFORM(WIN)
_snprintf(filenameSuffix, sizeof(filenameSuffix), ".%d.txt", GetCurrentProcessId());
#else
snprintf(filenameSuffix, sizeof(filenameSuffix), ".%d.txt", getpid());
#endif
#if DATA_LOG_TO_DARWIN_TEMP_DIR
char filenameBuffer[maxPathLength + 1];
unsigned suffixLength = strlen(filenameSuffix);
#if defined(DATA_LOG_FILENAME)
char* logBasename = strrchr(DATA_LOG_FILENAME, '/');
if (!logBasename)
logBasename = (char*)DATA_LOG_FILENAME;
#else
const char* logBasename = "WTFLog";
#endif
const char* filename = nullptr;
bool success = confstr(_CS_DARWIN_USER_TEMP_DIR, filenameBuffer, sizeof(filenameBuffer));
if (success) {
// FIXME: Assert that the path ends with a slash instead of adding a slash if it does not exist
// once <rdar://problem/23579077> is fixed in all iOS Simulator versions that we use.
size_t lastComponentLength = strlen(logBasename) + suffixLength;
size_t dirnameLength = strlen(filenameBuffer);
bool shouldAddPathSeparator = filenameBuffer[dirnameLength - 1] != '/' && logBasename[0] != '/';
if (lastComponentLength + shouldAddPathSeparator <= sizeof(filenameBuffer) - dirnameLength - 1) {
if (shouldAddPathSeparator)
strncat(filenameBuffer, "/", 1);
strncat(filenameBuffer, logBasename, sizeof(filenameBuffer) - strlen(filenameBuffer) - 1);
filename = filenameBuffer;
}
}
#elif defined(DATA_LOG_FILENAME)
const char* filename = DATA_LOG_FILENAME;
#else
const char* filename = getenv("WTF_DATA_LOG_FILENAME");
#endif
char actualFilename[maxPathLength + 1];
if (filename) {
#if PLATFORM(WIN)
_snprintf(actualFilename, sizeof(actualFilename), "%s%s", filename, filenameSuffix);
#else
snprintf(actualFilename, sizeof(actualFilename), "%s%s", filename, filenameSuffix);
#endif
file = FilePrintStream::open(actualFilename, "w").release();
if (file)
WTFLogAlways("*** DataLog output to \"%s\" ***\n", actualFilename);
else
WTFLogAlways("Warning: Could not open DataLog file %s for writing.\n", actualFilename);
}
#endif // DATA_LOG_TO_FILE
if (!file) {
// Use placement new; this makes it easier to use dataLog() to debug
// fastMalloc.
file = new (s_fileData) FilePrintStream(stderr, FilePrintStream::Borrow);
}
setvbuf(file->file(), 0, _IONBF, 0); // Prefer unbuffered output, so that we get a full log upon crash or deadlock.
s_file = new (s_lockedFileData) LockedPrintStream(std::unique_ptr<FilePrintStream>(file));
}
static void initializeLogFile()
{
static std::once_flag once;
std::call_once(
once,
[] {
initializeLogFileOnce();
});
}
PrintStream& dataFile()
{
initializeLogFile();
return *s_file;
}
void dataLogFV(const char* format, va_list argList)
{
dataFile().vprintf(format, argList);
}
void dataLogF(const char* format, ...)
{
va_list argList;
va_start(argList, format);
dataLogFV(format, argList);
va_end(argList);
}
void dataLogFString(const char* str)
{
dataFile().printf("%s", str);
}
} // namespace WTF
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