The Tor Browser: comparison security/sandbox/chromium/base/logging.cc

--1:000000000000
+:9467452aa520
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "base/logging.h"
+#if defined(OS_WIN)
+#include <io.h>
+#include <windows.h>
+typedef HANDLE FileHandle;
+typedef HANDLE MutexHandle;
+// Windows warns on using write().  It prefers _write().
+#define write(fd, buf, count) _write(fd, buf, static_cast<unsigned int>(count))
+// Windows doesn't define STDERR_FILENO.  Define it here.
+#define STDERR_FILENO 2
+#elif defined(OS_MACOSX)
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+#include <mach-o/dyld.h>
+#elif defined(OS_POSIX)
+#if defined(OS_NACL)
+#include <sys/time.h> // timespec doesn't seem to be in <time.h>
+#else
+#include <sys/syscall.h>
+#endif
+#include <time.h>
+#endif
+#if defined(OS_POSIX)
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#define MAX_PATH PATH_MAX
+typedef FILE* FileHandle;
+typedef pthread_mutex_t* MutexHandle;
+#endif
+#include <algorithm>
+#include <cstring>
+#include <ctime>
+#include <iomanip>
+#include <ostream>
+#include "base/base_switches.h"
+#include "base/command_line.h"
+#include "base/debug/alias.h"
+#include "base/debug/debugger.h"
+#include "base/debug/stack_trace.h"
+#include "base/posix/eintr_wrapper.h"
+#include "base/strings/string_piece.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/synchronization/lock_impl.h"
+#include "base/threading/platform_thread.h"
+#include "base/vlog.h"
+#if defined(OS_POSIX)
+#include "base/safe_strerror_posix.h"
+#endif
+#if defined(OS_ANDROID)
+#include <android/log.h>
+#endif
+namespace logging {
+DcheckState g_dcheck_state = DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS;
+DcheckState get_dcheck_state() {
+return g_dcheck_state;
+}
+void set_dcheck_state(DcheckState state) {
+g_dcheck_state = state;
+}
+namespace {
+VlogInfo* g_vlog_info = NULL;
+VlogInfo* g_vlog_info_prev = NULL;
+const char* const log_severity_names[LOG_NUM_SEVERITIES] = {
+"INFO", "WARNING", "ERROR", "ERROR_REPORT", "FATAL" };
+int min_log_level = 0;
+LoggingDestination logging_destination = LOG_DEFAULT;
+// For LOG_ERROR and above, always print to stderr.
+const int kAlwaysPrintErrorLevel = LOG_ERROR;
+// Which log file to use? This is initialized by InitLogging or
+// will be lazily initialized to the default value when it is
+// first needed.
+#if defined(OS_WIN)
+typedef std::wstring PathString;
+#else
+typedef std::string PathString;
+#endif
+PathString* log_file_name = NULL;
+// this file is lazily opened and the handle may be NULL
+FileHandle log_file = NULL;
+// what should be prepended to each message?
+bool log_process_id = false;
+bool log_thread_id = false;
+bool log_timestamp = true;
+bool log_tickcount = false;
+// Should we pop up fatal debug messages in a dialog?
+bool show_error_dialogs = false;
+// An assert handler override specified by the client to be called instead of
+// the debug message dialog and process termination.
+LogAssertHandlerFunction log_assert_handler = NULL;
+// An report handler override specified by the client to be called instead of
+// the debug message dialog.
+LogReportHandlerFunction log_report_handler = NULL;
+// A log message handler that gets notified of every log message we process.
+LogMessageHandlerFunction log_message_handler = NULL;
+// Helper functions to wrap platform differences.
+int32 CurrentProcessId() {
+#if defined(OS_WIN)
+return GetCurrentProcessId();
+#elif defined(OS_POSIX)
+return getpid();
+#endif
+}
+uint64 TickCount() {
+#if defined(OS_WIN)
+return GetTickCount();
+#elif defined(OS_MACOSX)
+return mach_absolute_time();
+#elif defined(OS_NACL)
+// NaCl sadly does not have _POSIX_TIMERS enabled in sys/features.h
+// So we have to use clock() for now.
+return clock();
+#elif defined(OS_POSIX)
+struct timespec ts;
+clock_gettime(CLOCK_MONOTONIC, &ts);
+uint64 absolute_micro =
+static_cast<int64>(ts.tv_sec) * 1000000 +
+static_cast<int64>(ts.tv_nsec) / 1000;
+return absolute_micro;
+#endif
+}
+void DeleteFilePath(const PathString& log_name) {
+#if defined(OS_WIN)
+DeleteFile(log_name.c_str());
+#elif defined (OS_NACL)
+// Do nothing; unlink() isn't supported on NaCl.
+#else
+unlink(log_name.c_str());
+#endif
+}
+PathString GetDefaultLogFile() {
+#if defined(OS_WIN)
+// On Windows we use the same path as the exe.
+wchar_t module_name[MAX_PATH];
+GetModuleFileName(NULL, module_name, MAX_PATH);
+PathString log_file = module_name;
+PathString::size_type last_backslash =
+log_file.rfind('\\', log_file.size());
+if (last_backslash != PathString::npos)
+log_file.erase(last_backslash + 1);
+log_file += L"debug.log";
+return log_file;
+#elif defined(OS_POSIX)
+// On other platforms we just use the current directory.
+return PathString("debug.log");
+#endif
+}
+// This class acts as a wrapper for locking the logging files.
+// LoggingLock::Init() should be called from the main thread before any logging
+// is done. Then whenever logging, be sure to have a local LoggingLock
+// instance on the stack. This will ensure that the lock is unlocked upon
+// exiting the frame.
+// LoggingLocks can not be nested.
+class LoggingLock {
+public:
+LoggingLock() {
+LockLogging();
+}
+~LoggingLock() {
+UnlockLogging();
+}
+static void Init(LogLockingState lock_log, const PathChar* new_log_file) {
+if (initialized)
+return;
+lock_log_file = lock_log;
+if (lock_log_file == LOCK_LOG_FILE) {
+#if defined(OS_WIN)
+if (!log_mutex) {
+std::wstring safe_name;
+if (new_log_file)
+safe_name = new_log_file;
+else
+safe_name = GetDefaultLogFile();
+// \ is not a legal character in mutex names so we replace \ with /
+std::replace(safe_name.begin(), safe_name.end(), '\\', '/');
+std::wstring t(L"Global\\");
+t.append(safe_name);
+log_mutex = ::CreateMutex(NULL, FALSE, t.c_str());
+if (log_mutex == NULL) {
+#if DEBUG
+// Keep the error code for debugging
+int error = GetLastError();  // NOLINT
+base::debug::BreakDebugger();
+#endif
+// Return nicely without putting initialized to true.
+return;
+}
+}
+#endif
+} else {
+log_lock = new base::internal::LockImpl();
+}
+initialized = true;
+}
+private:
+static void LockLogging() {
+if (lock_log_file == LOCK_LOG_FILE) {
+#if defined(OS_WIN)
+::WaitForSingleObject(log_mutex, INFINITE);
+// WaitForSingleObject could have returned WAIT_ABANDONED. We don't
+// abort the process here. UI tests might be crashy sometimes,
+// and aborting the test binary only makes the problem worse.
+// We also don't use LOG macros because that might lead to an infinite
+// loop. For more info see http://crbug.com/18028.
+#elif defined(OS_POSIX)
+pthread_mutex_lock(&log_mutex);
+#endif
+} else {
+// use the lock
+log_lock->Lock();
+}
+}
+static void UnlockLogging() {
+if (lock_log_file == LOCK_LOG_FILE) {
+#if defined(OS_WIN)
+ReleaseMutex(log_mutex);
+#elif defined(OS_POSIX)
+pthread_mutex_unlock(&log_mutex);
+#endif
+} else {
+log_lock->Unlock();
+}
+}
+// The lock is used if log file locking is false. It helps us avoid problems
+// with multiple threads writing to the log file at the same time.  Use
+// LockImpl directly instead of using Lock, because Lock makes logging calls.
+static base::internal::LockImpl* log_lock;
+// When we don't use a lock, we are using a global mutex. We need to do this
+// because LockFileEx is not thread safe.
+#if defined(OS_WIN)
+static MutexHandle log_mutex;
+#elif defined(OS_POSIX)
+static pthread_mutex_t log_mutex;
+#endif
+static bool initialized;
+static LogLockingState lock_log_file;
+};
+// static
+bool LoggingLock::initialized = false;
+// static
+base::internal::LockImpl* LoggingLock::log_lock = NULL;
+// static
+LogLockingState LoggingLock::lock_log_file = LOCK_LOG_FILE;
+#if defined(OS_WIN)
+// static
+MutexHandle LoggingLock::log_mutex = NULL;
+#elif defined(OS_POSIX)
+pthread_mutex_t LoggingLock::log_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+// Called by logging functions to ensure that debug_file is initialized
+// and can be used for writing. Returns false if the file could not be
+// initialized. debug_file will be NULL in this case.
+bool InitializeLogFileHandle() {
+if (log_file)
+return true;
+if (!log_file_name) {
+// Nobody has called InitLogging to specify a debug log file, so here we
+// initialize the log file name to a default.
+log_file_name = new PathString(GetDefaultLogFile());
+}
+if ((logging_destination & LOG_TO_FILE) != 0) {
+#if defined(OS_WIN)
+log_file = CreateFile(log_file_name->c_str(), GENERIC_WRITE,
+FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
+OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+if (log_file == INVALID_HANDLE_VALUE || log_file == NULL) {
+// try the current directory
+log_file = CreateFile(L".\\debug.log", GENERIC_WRITE,
+FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
+OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+if (log_file == INVALID_HANDLE_VALUE || log_file == NULL) {
+log_file = NULL;
+return false;
+}
+}
+SetFilePointer(log_file, 0, 0, FILE_END);
+#elif defined(OS_POSIX)
+log_file = fopen(log_file_name->c_str(), "a");
+if (log_file == NULL)
+return false;
+#endif
+}
+return true;
+}
+void CloseFile(FileHandle log) {
+#if defined(OS_WIN)
+CloseHandle(log);
+#else
+fclose(log);
+#endif
+}
+void CloseLogFileUnlocked() {
+if (!log_file)
+return;
+CloseFile(log_file);
+log_file = NULL;
+}
+}  // namespace
+LoggingSettings::LoggingSettings()
+: logging_dest(LOG_DEFAULT),
+log_file(NULL),
+lock_log(LOCK_LOG_FILE),
+delete_old(APPEND_TO_OLD_LOG_FILE),
+dcheck_state(DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS) {}
+bool BaseInitLoggingImpl(const LoggingSettings& settings) {
+#if defined(OS_NACL)
+// Can log only to the system debug log.
+CHECK_EQ(settings.logging_dest & ~LOG_TO_SYSTEM_DEBUG_LOG, 0);
+#endif
+g_dcheck_state = settings.dcheck_state;
+CommandLine* command_line = CommandLine::ForCurrentProcess();
+// Don't bother initializing g_vlog_info unless we use one of the
+// vlog switches.
+if (command_line->HasSwitch(switches::kV) ||
+command_line->HasSwitch(switches::kVModule)) {
+// NOTE: If g_vlog_info has already been initialized, it might be in use
+// by another thread. Don't delete the old VLogInfo, just create a second
+// one. We keep track of both to avoid memory leak warnings.
+CHECK(!g_vlog_info_prev);
+g_vlog_info_prev = g_vlog_info;
+g_vlog_info =
+new VlogInfo(command_line->GetSwitchValueASCII(switches::kV),
+command_line->GetSwitchValueASCII(switches::kVModule),
+&min_log_level);
+}
+logging_destination = settings.logging_dest;
+// ignore file options unless logging to file is set.
+if ((logging_destination & LOG_TO_FILE) == 0)
+return true;
+LoggingLock::Init(settings.lock_log, settings.log_file);
+LoggingLock logging_lock;
+// Calling InitLogging twice or after some log call has already opened the
+// default log file will re-initialize to the new options.
+CloseLogFileUnlocked();
+if (!log_file_name)
+log_file_name = new PathString();
+*log_file_name = settings.log_file;
+if (settings.delete_old == DELETE_OLD_LOG_FILE)
+DeleteFilePath(*log_file_name);
+return InitializeLogFileHandle();
+}
+void SetMinLogLevel(int level) {
+min_log_level = std::min(LOG_ERROR_REPORT, level);
+}
+int GetMinLogLevel() {
+return min_log_level;
+}
+int GetVlogVerbosity() {
+return std::max(-1, LOG_INFO - GetMinLogLevel());
+}
+int GetVlogLevelHelper(const char* file, size_t N) {
+DCHECK_GT(N, 0U);
+// Note: g_vlog_info may change on a different thread during startup
+// (but will always be valid or NULL).
+VlogInfo* vlog_info = g_vlog_info;
+return vlog_info ?
+vlog_info->GetVlogLevel(base::StringPiece(file, N - 1)) :
+GetVlogVerbosity();
+}
+void SetLogItems(bool enable_process_id, bool enable_thread_id,
+bool enable_timestamp, bool enable_tickcount) {
+log_process_id = enable_process_id;
+log_thread_id = enable_thread_id;
+log_timestamp = enable_timestamp;
+log_tickcount = enable_tickcount;
+}
+void SetShowErrorDialogs(bool enable_dialogs) {
+show_error_dialogs = enable_dialogs;
+}
+void SetLogAssertHandler(LogAssertHandlerFunction handler) {
+log_assert_handler = handler;
+}
+void SetLogReportHandler(LogReportHandlerFunction handler) {
+log_report_handler = handler;
+}
+void SetLogMessageHandler(LogMessageHandlerFunction handler) {
+log_message_handler = handler;
+}
+LogMessageHandlerFunction GetLogMessageHandler() {
+return log_message_handler;
+}
+// MSVC doesn't like complex extern templates and DLLs.
+#if !defined(COMPILER_MSVC)
+// Explicit instantiations for commonly used comparisons.
+template std::string* MakeCheckOpString<int, int>(
+const int&, const int&, const char* names);
+template std::string* MakeCheckOpString<unsigned long, unsigned long>(
+const unsigned long&, const unsigned long&, const char* names);
+template std::string* MakeCheckOpString<unsigned long, unsigned int>(
+const unsigned long&, const unsigned int&, const char* names);
+template std::string* MakeCheckOpString<unsigned int, unsigned long>(
+const unsigned int&, const unsigned long&, const char* names);
+template std::string* MakeCheckOpString<std::string, std::string>(
+const std::string&, const std::string&, const char* name);
+#endif
+// Displays a message box to the user with the error message in it.
+// Used for fatal messages, where we close the app simultaneously.
+// This is for developers only; we don't use this in circumstances
+// (like release builds) where users could see it, since users don't
+// understand these messages anyway.
+void DisplayDebugMessageInDialog(const std::string& str) {
+if (str.empty())
+return;
+if (!show_error_dialogs)
+return;
+#if defined(OS_WIN)
+// For Windows programs, it's possible that the message loop is
+// messed up on a fatal error, and creating a MessageBox will cause
+// that message loop to be run. Instead, we try to spawn another
+// process that displays its command line. We look for "Debug
+// Message.exe" in the same directory as the application. If it
+// exists, we use it, otherwise, we use a regular message box.
+wchar_t prog_name[MAX_PATH];
+GetModuleFileNameW(NULL, prog_name, MAX_PATH);
+wchar_t* backslash = wcsrchr(prog_name, '\\');
+if (backslash)
+backslash[1] = 0;
+wcscat_s(prog_name, MAX_PATH, L"debug_message.exe");
+std::wstring cmdline = UTF8ToWide(str);
+if (cmdline.empty())
+return;
+STARTUPINFO startup_info;
+memset(&startup_info, 0, sizeof(startup_info));
+startup_info.cb = sizeof(startup_info);
+PROCESS_INFORMATION process_info;
+if (CreateProcessW(prog_name, &cmdline[0], NULL, NULL, false, 0, NULL,
+NULL, &startup_info, &process_info)) {
+WaitForSingleObject(process_info.hProcess, INFINITE);
+CloseHandle(process_info.hThread);
+CloseHandle(process_info.hProcess);
+} else {
+// debug process broken, let's just do a message box
+MessageBoxW(NULL, &cmdline[0], L"Fatal error",
+MB_OK | MB_ICONHAND | MB_TOPMOST);
+}
+#else
+// We intentionally don't implement a dialog on other platforms.
+// You can just look at stderr.
+#endif
+}
+#if defined(OS_WIN)
+LogMessage::SaveLastError::SaveLastError() : last_error_(::GetLastError()) {
+}
+LogMessage::SaveLastError::~SaveLastError() {
+::SetLastError(last_error_);
+}
+#endif  // defined(OS_WIN)
+LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
+int ctr)
+: severity_(severity), file_(file), line_(line) {
+Init(file, line);
+}
+LogMessage::LogMessage(const char* file, int line)
+: severity_(LOG_INFO), file_(file), line_(line) {
+Init(file, line);
+}
+LogMessage::LogMessage(const char* file, int line, LogSeverity severity)
+: severity_(severity), file_(file), line_(line) {
+Init(file, line);
+}
+LogMessage::LogMessage(const char* file, int line, std::string* result)
+: severity_(LOG_FATAL), file_(file), line_(line) {
+Init(file, line);
+stream_ << "Check failed: " << *result;
+delete result;
+}
+LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
+std::string* result)
+: severity_(severity), file_(file), line_(line) {
+Init(file, line);
+stream_ << "Check failed: " << *result;
+delete result;
+}
+LogMessage::~LogMessage() {
+#if !defined(NDEBUG) && !defined(OS_NACL)
+if (severity_ == LOG_FATAL) {
+// Include a stack trace on a fatal.
+base::debug::StackTrace trace;
+stream_ << std::endl;  // Newline to separate from log message.
+trace.OutputToStream(&stream_);
+}
+#endif
+stream_ << std::endl;
+std::string str_newline(stream_.str());
+// Give any log message handler first dibs on the message.
+if (log_message_handler &&
+log_message_handler(severity_, file_, line_,
+message_start_, str_newline)) {
+// The handler took care of it, no further processing.
+return;
+}
+if ((logging_destination & LOG_TO_SYSTEM_DEBUG_LOG) != 0) {
+#if defined(OS_WIN)
+OutputDebugStringA(str_newline.c_str());
+#elif defined(OS_ANDROID)
+android_LogPriority priority =
+(severity_ < 0) ? ANDROID_LOG_VERBOSE : ANDROID_LOG_UNKNOWN;
+switch (severity_) {
+case LOG_INFO:
+priority = ANDROID_LOG_INFO;
+break;
+case LOG_WARNING:
+priority = ANDROID_LOG_WARN;
+break;
+case LOG_ERROR:
+case LOG_ERROR_REPORT:
+priority = ANDROID_LOG_ERROR;
+break;
+case LOG_FATAL:
+priority = ANDROID_LOG_FATAL;
+break;
+}
+__android_log_write(priority, "chromium", str_newline.c_str());
+#endif
+fprintf(stderr, "%s", str_newline.c_str());
+fflush(stderr);
+} else if (severity_ >= kAlwaysPrintErrorLevel) {
+// When we're only outputting to a log file, above a certain log level, we
+// should still output to stderr so that we can better detect and diagnose
+// problems with unit tests, especially on the buildbots.
+fprintf(stderr, "%s", str_newline.c_str());
+fflush(stderr);
+}
+// write to log file
+if ((logging_destination & LOG_TO_FILE) != 0) {
+// We can have multiple threads and/or processes, so try to prevent them
+// from clobbering each other's writes.
+// If the client app did not call InitLogging, and the lock has not
+// been created do it now. We do this on demand, but if two threads try
+// to do this at the same time, there will be a race condition to create
+// the lock. This is why InitLogging should be called from the main
+// thread at the beginning of execution.
+LoggingLock::Init(LOCK_LOG_FILE, NULL);
+LoggingLock logging_lock;
+if (InitializeLogFileHandle()) {
+#if defined(OS_WIN)
+SetFilePointer(log_file, 0, 0, SEEK_END);
+DWORD num_written;
+WriteFile(log_file,
+static_cast<const void*>(str_newline.c_str()),
+static_cast<DWORD>(str_newline.length()),
+&num_written,
+NULL);
+#else
+fprintf(log_file, "%s", str_newline.c_str());
+fflush(log_file);
+#endif
+}
+}
+if (severity_ == LOG_FATAL) {
+// Ensure the first characters of the string are on the stack so they
+// are contained in minidumps for diagnostic purposes.
+char str_stack[1024];
+str_newline.copy(str_stack, arraysize(str_stack));
+base::debug::Alias(str_stack);
+// display a message or break into the debugger on a fatal error
+if (base::debug::BeingDebugged()) {
+base::debug::BreakDebugger();
+} else {
+if (log_assert_handler) {
+// make a copy of the string for the handler out of paranoia
+log_assert_handler(std::string(stream_.str()));
+} else {
+// Don't use the string with the newline, get a fresh version to send to
+// the debug message process. We also don't display assertions to the
+// user in release mode. The enduser can't do anything with this
+// information, and displaying message boxes when the application is
+// hosed can cause additional problems.
+#ifndef NDEBUG
+DisplayDebugMessageInDialog(stream_.str());
+#endif
+// Crash the process to generate a dump.
+base::debug::BreakDebugger();
+}
+}
+} else if (severity_ == LOG_ERROR_REPORT) {
+// We are here only if the user runs with --enable-dcheck in release mode.
+if (log_report_handler) {
+log_report_handler(std::string(stream_.str()));
+} else {
+DisplayDebugMessageInDialog(stream_.str());
+}
+}
+}
+// writes the common header info to the stream
+void LogMessage::Init(const char* file, int line) {
+base::StringPiece filename(file);
+size_t last_slash_pos = filename.find_last_of("\\/");
+if (last_slash_pos != base::StringPiece::npos)
+filename.remove_prefix(last_slash_pos + 1);
+// TODO(darin): It might be nice if the columns were fixed width.
+stream_ <<  '[';
+if (log_process_id)
+stream_ << CurrentProcessId() << ':';
+if (log_thread_id)
+stream_ << base::PlatformThread::CurrentId() << ':';
+if (log_timestamp) {
+time_t t = time(NULL);
+struct tm local_time = {0};
+#if _MSC_VER >= 1400
+localtime_s(&local_time, &t);
+#else
+localtime_r(&t, &local_time);
+#endif
+struct tm* tm_time = &local_time;
+stream_ << std::setfill('0')
+<< std::setw(2) << 1 + tm_time->tm_mon
+<< std::setw(2) << tm_time->tm_mday
+<< '/'
+<< std::setw(2) << tm_time->tm_hour
+<< std::setw(2) << tm_time->tm_min
+<< std::setw(2) << tm_time->tm_sec
+<< ':';
+}
+if (log_tickcount)
+stream_ << TickCount() << ':';
+if (severity_ >= 0)
+stream_ << log_severity_names[severity_];
+else
+stream_ << "VERBOSE" << -severity_;
+stream_ << ":" << filename << "(" << line << ")] ";
+message_start_ = stream_.tellp();
+}
+#if defined(OS_WIN)
+// This has already been defined in the header, but defining it again as DWORD
+// ensures that the type used in the header is equivalent to DWORD. If not,
+// the redefinition is a compile error.
+typedef DWORD SystemErrorCode;
+#endif
+SystemErrorCode GetLastSystemErrorCode() {
+#if defined(OS_WIN)
+return ::GetLastError();
+#elif defined(OS_POSIX)
+return errno;
+#else
+#error Not implemented
+#endif
+}
+#if defined(OS_WIN)
+Win32ErrorLogMessage::Win32ErrorLogMessage(const char* file,
+int line,
+LogSeverity severity,
+SystemErrorCode err,
+const char* module)
+: err_(err),
+module_(module),
+log_message_(file, line, severity) {
+}
+Win32ErrorLogMessage::Win32ErrorLogMessage(const char* file,
+int line,
+LogSeverity severity,
+SystemErrorCode err)
+: err_(err),
+module_(NULL),
+log_message_(file, line, severity) {
+}
+Win32ErrorLogMessage::~Win32ErrorLogMessage() {
+const int error_message_buffer_size = 256;
+char msgbuf[error_message_buffer_size];
+DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
+HMODULE hmod;
+if (module_) {
+hmod = GetModuleHandleA(module_);
+if (hmod) {
+flags |= FORMAT_MESSAGE_FROM_HMODULE;
+} else {
+// This makes a nested Win32ErrorLogMessage. It will have module_ of NULL
+// so it will not call GetModuleHandle, so recursive errors are
+// impossible.
+DPLOG(WARNING) << "Couldn't open module " << module_
+<< " for error message query";
+}
+} else {
+hmod = NULL;
+}
+DWORD len = FormatMessageA(flags,
+hmod,
+err_,
+0,
+msgbuf,
+sizeof(msgbuf) / sizeof(msgbuf[0]),
+NULL);
+if (len) {
+while ((len > 0) &&
+isspace(static_cast<unsigned char>(msgbuf[len - 1]))) {
+msgbuf[--len] = 0;
+}
+stream() << ": " << msgbuf;
+} else {
+stream() << ": Error " << GetLastError() << " while retrieving error "
+<< err_;
+}
+// We're about to crash (CHECK). Put |err_| on the stack (by placing it in a
+// field) and use Alias in hopes that it makes it into crash dumps.
+DWORD last_error = err_;
+base::debug::Alias(&last_error);
+}
+#elif defined(OS_POSIX)
+ErrnoLogMessage::ErrnoLogMessage(const char* file,
+int line,
+LogSeverity severity,
+SystemErrorCode err)
+: err_(err),
+log_message_(file, line, severity) {
+}
+ErrnoLogMessage::~ErrnoLogMessage() {
+stream() << ": " << safe_strerror(err_);
+}
+#endif  // OS_WIN
+void CloseLogFile() {
+LoggingLock logging_lock;
+CloseLogFileUnlocked();
+}
+void RawLog(int level, const char* message) {
+if (level >= min_log_level) {
+size_t bytes_written = 0;
+const size_t message_len = strlen(message);
+int rv;
+while (bytes_written < message_len) {
+rv = HANDLE_EINTR(
+write(STDERR_FILENO, message + bytes_written,
+message_len - bytes_written));
+if (rv < 0) {
+// Give up, nothing we can do now.
+break;
+}
+bytes_written += rv;
+}
+if (message_len > 0 && message[message_len - 1] != '\n') {
+do {
+rv = HANDLE_EINTR(write(STDERR_FILENO, "\n", 1));
+if (rv < 0) {
+// Give up, nothing we can do now.
+break;
+}
+} while (rv != 1);
+}
+}
+if (level == LOG_FATAL)
+base::debug::BreakDebugger();
+}
+// This was defined at the beginning of this file.
+#undef write
+#if defined(OS_WIN)
+std::wstring GetLogFileFullPath() {
+if (log_file_name)
+return *log_file_name;
+return std::wstring();
+}
+#endif
+}  // namespace logging
+std::ostream& operator<<(std::ostream& out, const wchar_t* wstr) {
+return out << WideToUTF8(std::wstring(wstr));
+}

The Tor Browser / file comparison

comparison: security/sandbox/chromium/base/logging.cc

security/sandbox/chromium/base/logging.cc