This source file includes following definitions.
- WTF_ATTRIBUTE_PRINTF
- vprintf_stderr_with_prefix
- vprintf_stderr_with_trailing_newline
- WTF_ATTRIBUTE_PRINTF
- printCallSite
- WTFReportAssertionFailure
- WTFReportAssertionFailureWithMessage
- WTFReportArgumentAssertionFailure
- WTFGetBacktrace
- WTFReportBacktrace
- WTFPrintBacktrace
- WTFSetCrashHook
- WTFInvokeCrashHook
- dumpBacktraceSignalHandler
- installSignalHandlersForFatalErrors
- resetSignalHandlersForFatalErrors
- WTFInstallReportBacktraceOnCrashHook
- WTFReportFatalError
- WTFReportError
- WTFLog
- WTFLogVerbose
- WTFLogAlways
#pragma GCC diagnostic ignored "-Wmissing-format-attribute"
#include "config.h"
#include "Assertions.h"
#include "Compiler.h"
#include "OwnPtr.h"
#include "PassOwnPtr.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#if HAVE(SIGNAL_H)
#include <signal.h>
#endif
#if USE(CF)
#include <AvailabilityMacros.h>
#include <CoreFoundation/CFString.h>
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
#define WTF_USE_APPLE_SYSTEM_LOG 1
#include <asl.h>
#endif
#endif
#if COMPILER(MSVC)
#include <crtdbg.h>
#endif
#if OS(WIN)
#include <windows.h>
#define HAVE_ISDEBUGGERPRESENT 1
#endif
#if OS(MACOSX) || (OS(LINUX) && !defined(__UCLIBC__))
#include <cxxabi.h>
#include <dlfcn.h>
#include <execinfo.h>
#endif
#if OS(ANDROID)
#include <android/log.h>
#endif
extern "C" {
WTF_ATTRIBUTE_PRINTF(1, 0)
static void vprintf_stderr_common(const char* format, va_list args)
{
#if USE(CF) && !OS(WIN)
if (strstr(format, "%@")) {
CFStringRef cfFormat = CFStringCreateWithCString(NULL, format, kCFStringEncodingUTF8);
#if COMPILER(CLANG)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
CFStringRef str = CFStringCreateWithFormatAndArguments(NULL, NULL, cfFormat, args);
#if COMPILER(CLANG)
#pragma clang diagnostic pop
#endif
CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(str), kCFStringEncodingUTF8);
char* buffer = (char*)malloc(length + 1);
CFStringGetCString(str, buffer, length, kCFStringEncodingUTF8);
#if USE(APPLE_SYSTEM_LOG)
asl_log(0, 0, ASL_LEVEL_NOTICE, "%s", buffer);
#endif
fputs(buffer, stderr);
free(buffer);
CFRelease(str);
CFRelease(cfFormat);
return;
}
#if USE(APPLE_SYSTEM_LOG)
va_list copyOfArgs;
va_copy(copyOfArgs, args);
asl_vlog(0, 0, ASL_LEVEL_NOTICE, format, copyOfArgs);
va_end(copyOfArgs);
#endif
#elif OS(ANDROID)
__android_log_vprint(ANDROID_LOG_WARN, "WebKit", format, args);
#elif HAVE(ISDEBUGGERPRESENT)
if (IsDebuggerPresent()) {
size_t size = 1024;
do {
char* buffer = (char*)malloc(size);
if (buffer == NULL)
break;
if (_vsnprintf(buffer, size, format, args) != -1) {
OutputDebugStringA(buffer);
free(buffer);
break;
}
free(buffer);
size *= 2;
} while (size > 1024);
}
#endif
vfprintf(stderr, format, args);
}
#if COMPILER(CLANG) || (COMPILER(GCC) && GCC_VERSION_AT_LEAST(4, 6, 0))
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#endif
static void vprintf_stderr_with_prefix(const char* prefix, const char* format, va_list args)
{
size_t prefixLength = strlen(prefix);
size_t formatLength = strlen(format);
OwnPtr<char[]> formatWithPrefix = adoptArrayPtr(new char[prefixLength + formatLength + 1]);
memcpy(formatWithPrefix.get(), prefix, prefixLength);
memcpy(formatWithPrefix.get() + prefixLength, format, formatLength);
formatWithPrefix[prefixLength + formatLength] = 0;
vprintf_stderr_common(formatWithPrefix.get(), args);
}
static void vprintf_stderr_with_trailing_newline(const char* format, va_list args)
{
size_t formatLength = strlen(format);
if (formatLength && format[formatLength - 1] == '\n') {
vprintf_stderr_common(format, args);
return;
}
OwnPtr<char[]> formatWithNewline = adoptArrayPtr(new char[formatLength + 2]);
memcpy(formatWithNewline.get(), format, formatLength);
formatWithNewline[formatLength] = '\n';
formatWithNewline[formatLength + 1] = 0;
vprintf_stderr_common(formatWithNewline.get(), args);
}
#if COMPILER(CLANG) || (COMPILER(GCC) && GCC_VERSION_AT_LEAST(4, 6, 0))
#pragma GCC diagnostic pop
#endif
WTF_ATTRIBUTE_PRINTF(1, 2)
static void printf_stderr_common(const char* format, ...)
{
va_list args;
va_start(args, format);
vprintf_stderr_common(format, args);
va_end(args);
}
static void printCallSite(const char* file, int line, const char* function)
{
#if OS(WIN) && defined(_DEBUG)
_CrtDbgReport(_CRT_WARN, file, line, NULL, "%s\n", function);
#else
printf_stderr_common("%s(%d) : %s\n", file, line, function);
#endif
}
void WTFReportAssertionFailure(const char* file, int line, const char* function, const char* assertion)
{
if (assertion)
printf_stderr_common("ASSERTION FAILED: %s\n", assertion);
else
printf_stderr_common("SHOULD NEVER BE REACHED\n");
printCallSite(file, line, function);
}
void WTFReportAssertionFailureWithMessage(const char* file, int line, const char* function, const char* assertion, const char* format, ...)
{
va_list args;
va_start(args, format);
vprintf_stderr_with_prefix("ASSERTION FAILED: ", format, args);
va_end(args);
printf_stderr_common("\n%s\n", assertion);
printCallSite(file, line, function);
}
void WTFReportArgumentAssertionFailure(const char* file, int line, const char* function, const char* argName, const char* assertion)
{
printf_stderr_common("ARGUMENT BAD: %s, %s\n", argName, assertion);
printCallSite(file, line, function);
}
void WTFGetBacktrace(void** stack, int* size)
{
#if OS(MACOSX) || (OS(LINUX) && !defined(__UCLIBC__))
*size = backtrace(stack, *size);
#elif OS(WIN)
typedef WORD (NTAPI* RtlCaptureStackBackTraceFunc)(DWORD, DWORD, PVOID*, PDWORD);
HMODULE kernel32 = ::GetModuleHandleW(L"Kernel32.dll");
if (!kernel32) {
*size = 0;
return;
}
RtlCaptureStackBackTraceFunc captureStackBackTraceFunc = reinterpret_cast<RtlCaptureStackBackTraceFunc>(
::GetProcAddress(kernel32, "RtlCaptureStackBackTrace"));
if (captureStackBackTraceFunc)
*size = captureStackBackTraceFunc(0, *size, stack, 0);
else
*size = 0;
#else
*size = 0;
#endif
}
void WTFReportBacktrace(int framesToShow)
{
static const int framesToSkip = 2;
void** samples = static_cast<void**>(alloca((framesToShow + framesToSkip) * sizeof(void *)));
int frames = framesToShow + framesToSkip;
WTFGetBacktrace(samples, &frames);
WTFPrintBacktrace(samples + framesToSkip, frames - framesToSkip);
}
void WTFPrintBacktrace(void** stack, int size)
{
for (int i = 0; i < size; ++i) {
const char* mangledName = 0;
char* cxaDemangled = 0;
#if OS(MACOSX) || OS(LINUX)
Dl_info info;
if (dladdr(stack[i], &info) && info.dli_sname)
mangledName = info.dli_sname;
if (mangledName)
cxaDemangled = abi::__cxa_demangle(mangledName, 0, 0, 0);
#endif
const int frameNumber = i + 1;
if (mangledName || cxaDemangled)
printf_stderr_common("%-3d %p %s\n", frameNumber, stack[i], cxaDemangled ? cxaDemangled : mangledName);
else
printf_stderr_common("%-3d %p\n", frameNumber, stack[i]);
free(cxaDemangled);
}
}
static WTFCrashHookFunction globalHook = 0;
void WTFSetCrashHook(WTFCrashHookFunction function)
{
globalHook = function;
}
void WTFInvokeCrashHook()
{
if (globalHook)
globalHook();
}
#if HAVE(SIGNAL_H)
static NO_RETURN void dumpBacktraceSignalHandler(int sig)
{
WTFReportBacktrace();
exit(128 + sig);
}
static void installSignalHandlersForFatalErrors(void (*handler)(int))
{
signal(SIGILL, handler);
signal(SIGTRAP, handler);
signal(SIGFPE, handler);
signal(SIGBUS, handler);
signal(SIGSEGV, handler);
signal(SIGSYS, handler);
signal(SIGPIPE, handler);
signal(SIGXCPU, handler);
signal(SIGXFSZ, handler);
}
static void resetSignalHandlersForFatalErrors()
{
installSignalHandlersForFatalErrors(SIG_DFL);
}
#endif
void WTFInstallReportBacktraceOnCrashHook()
{
#if HAVE(SIGNAL_H)
WTFSetCrashHook(&resetSignalHandlersForFatalErrors);
installSignalHandlersForFatalErrors(&dumpBacktraceSignalHandler);
#endif
}
void WTFReportFatalError(const char* file, int line, const char* function, const char* format, ...)
{
va_list args;
va_start(args, format);
vprintf_stderr_with_prefix("FATAL ERROR: ", format, args);
va_end(args);
printf_stderr_common("\n");
printCallSite(file, line, function);
}
void WTFReportError(const char* file, int line, const char* function, const char* format, ...)
{
va_list args;
va_start(args, format);
vprintf_stderr_with_prefix("ERROR: ", format, args);
va_end(args);
printf_stderr_common("\n");
printCallSite(file, line, function);
}
void WTFLog(WTFLogChannel* channel, const char* format, ...)
{
if (channel->state != WTFLogChannelOn)
return;
va_list args;
va_start(args, format);
vprintf_stderr_with_trailing_newline(format, args);
va_end(args);
}
void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChannel* channel, const char* format, ...)
{
if (channel->state != WTFLogChannelOn)
return;
va_list args;
va_start(args, format);
vprintf_stderr_with_trailing_newline(format, args);
va_end(args);
printCallSite(file, line, function);
}
void WTFLogAlways(const char* format, ...)
{
va_list args;
va_start(args, format);
vprintf_stderr_with_trailing_newline(format, args);
va_end(args);
}
}