274 lines
8 KiB
C++
274 lines
8 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/logging.h"
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#include <sys/syscall.h>
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#include <time.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <algorithm>
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#include <cstring>
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#include <ctime>
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#include <iomanip>
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#include <ostream>
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#include <string>
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#include "base/posix/eintr_wrapper.h"
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#include "base/strings/string_piece.h"
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#include "base/strings/string_util.h"
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#include "base/strings/stringprintf.h"
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#include "base/strings/utf_string_conversion_utils.h"
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namespace logging {
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namespace {
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const char* const log_severity_names[LOG_NUM_SEVERITIES] = {
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"INFO", "WARNING", "ERROR", "FATAL" };
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const char* log_severity_name(int severity) {
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if (severity >= 0 && severity < LOG_NUM_SEVERITIES)
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return log_severity_names[severity];
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return "UNKNOWN";
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}
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int g_min_log_level = 0;
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LoggingDestination g_logging_destination = LOG_DEFAULT;
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// For LOG_ERROR and above, always print to stderr.
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const int kAlwaysPrintErrorLevel = LOG_ERROR;
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// What should be prepended to each message?
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bool g_log_timestamp = true;
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// Should we pop up fatal debug messages in a dialog?
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bool show_error_dialogs = false;
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// An assert handler override specified by the client to be called instead of
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// the debug message dialog and process termination.
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LogAssertHandlerFunction log_assert_handler = nullptr;
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// A log message handler that gets notified of every log message we process.
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LogMessageHandlerFunction log_message_handler = nullptr;
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// Helper functions to wrap platform differences.
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} // namespace
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LoggingSettings::LoggingSettings()
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: logging_dest(LOG_DEFAULT) {}
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bool BaseInitLoggingImpl(const LoggingSettings& settings) {
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g_logging_destination = settings.logging_dest;
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return true;
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}
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void SetMinLogLevel(int level) {
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g_min_log_level = std::min(LOG_FATAL, level);
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}
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int GetMinLogLevel() {
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return g_min_log_level;
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}
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bool ShouldCreateLogMessage(int severity) {
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if (severity < g_min_log_level)
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return false;
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// Return true here unless we know ~LogMessage won't do anything. Note that
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// ~LogMessage writes to stderr if severity_ >= kAlwaysPrintErrorLevel, even
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// when g_logging_destination is LOG_NONE.
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return g_logging_destination != LOG_NONE || log_message_handler ||
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severity >= kAlwaysPrintErrorLevel;
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}
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int GetVlogVerbosity() {
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return std::max(-1, LOG_INFO - GetMinLogLevel());
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}
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void SetLogItems(bool enable_process_id, bool enable_thread_id,
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bool enable_timestamp, bool enable_tickcount) {
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g_log_timestamp = enable_timestamp;
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}
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void SetShowErrorDialogs(bool enable_dialogs) {
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show_error_dialogs = enable_dialogs;
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}
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void SetLogAssertHandler(LogAssertHandlerFunction handler) {
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log_assert_handler = handler;
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}
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void SetLogMessageHandler(LogMessageHandlerFunction handler) {
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log_message_handler = handler;
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}
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LogMessageHandlerFunction GetLogMessageHandler() {
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return log_message_handler;
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}
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// Explicit instantiations for commonly used comparisons.
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template std::string* MakeCheckOpString<int, int>(
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const int&, const int&, const char* names);
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template std::string* MakeCheckOpString<unsigned long, unsigned long>(
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const unsigned long&, const unsigned long&, const char* names);
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template std::string* MakeCheckOpString<unsigned long, unsigned int>(
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const unsigned long&, const unsigned int&, const char* names);
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template std::string* MakeCheckOpString<unsigned int, unsigned long>(
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const unsigned int&, const unsigned long&, const char* names);
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template std::string* MakeCheckOpString<std::string, std::string>(
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const std::string&, const std::string&, const char* name);
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LogMessage::LogMessage(const char* file, int line, LogSeverity severity)
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: severity_(severity), file_(file), line_(line) {
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Init(file, line);
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}
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LogMessage::LogMessage(const char* file, int line, const char* condition)
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: severity_(LOG_FATAL), file_(file), line_(line) {
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Init(file, line);
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stream_ << "Check failed: " << condition << ". ";
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}
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LogMessage::LogMessage(const char* file, int line, std::string* result)
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: severity_(LOG_FATAL), file_(file), line_(line) {
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Init(file, line);
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stream_ << "Check failed: " << *result;
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delete result;
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}
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LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
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std::string* result)
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: severity_(severity), file_(file), line_(line) {
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Init(file, line);
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stream_ << "Check failed: " << *result;
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delete result;
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}
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LogMessage::~LogMessage() {
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stream_ << std::endl;
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std::string str_newline(stream_.str());
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// Give any log message handler first dibs on the message.
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if (log_message_handler &&
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log_message_handler(severity_, file_, line_,
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message_start_, str_newline)) {
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// The handler took care of it, no further processing.
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return;
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}
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if ((g_logging_destination & LOG_TO_SYSTEM_DEBUG_LOG) != 0) {
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ignore_result(fwrite(str_newline.data(), str_newline.size(), 1, stderr));
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fflush(stderr);
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} else if (severity_ >= kAlwaysPrintErrorLevel) {
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// When we're only outputting to a log file, above a certain log level, we
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// should still output to stderr so that we can better detect and diagnose
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// problems with unit tests, especially on the buildbots.
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ignore_result(fwrite(str_newline.data(), str_newline.size(), 1, stderr));
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fflush(stderr);
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}
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if (severity_ == LOG_FATAL) {
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// Ensure the first characters of the string are on the stack so they
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// are contained in minidumps for diagnostic purposes.
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char str_stack[1024];
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str_newline.copy(str_stack, arraysize(str_stack));
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if (log_assert_handler) {
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// Make a copy of the string for the handler out of paranoia.
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log_assert_handler(std::string(stream_.str()));
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} else {
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// Crash the process to generate a dump.
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abort();
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}
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}
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}
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// writes the common header info to the stream
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void LogMessage::Init(const char* file, int line) {
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base::StringPiece filename(file);
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size_t last_slash_pos = filename.find_last_of("\\/");
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if (last_slash_pos != base::StringPiece::npos)
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filename.remove_prefix(last_slash_pos + 1);
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// TODO(darin): It might be nice if the columns were fixed width.
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stream_ << '[';
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if (g_log_timestamp) {
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time_t t = time(nullptr);
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struct tm local_time;
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memset(&local_time, 0, sizeof(local_time));
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#ifdef _MSC_VER
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localtime_s(&local_time, &t);
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#else
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localtime_r(&t, &local_time);
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#endif
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struct tm* tm_time = &local_time;
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stream_ << std::setfill('0')
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<< std::setw(2) << 1 + tm_time->tm_mon
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<< std::setw(2) << tm_time->tm_mday
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<< '/'
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<< std::setw(2) << tm_time->tm_hour
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<< std::setw(2) << tm_time->tm_min
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<< std::setw(2) << tm_time->tm_sec
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<< ':';
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}
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if (severity_ >= 0)
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stream_ << log_severity_name(severity_);
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else
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stream_ << "VERBOSE" << -severity_;
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stream_ << ":" << filename << "(" << line << ")] ";
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message_start_ = stream_.str().length();
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}
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void RawLog(int level, const char* message) {
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if (level >= g_min_log_level) {
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size_t bytes_written = 0;
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const size_t message_len = strlen(message);
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int rv;
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while (bytes_written < message_len) {
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rv = HANDLE_EINTR(
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write(STDERR_FILENO, message + bytes_written,
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message_len - bytes_written));
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if (rv < 0) {
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// Give up, nothing we can do now.
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break;
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}
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bytes_written += rv;
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}
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if (message_len > 0 && message[message_len - 1] != '\n') {
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do {
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rv = HANDLE_EINTR(write(STDERR_FILENO, "\n", 1));
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if (rv < 0) {
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// Give up, nothing we can do now.
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break;
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}
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} while (rv != 1);
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}
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}
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if (level == LOG_FATAL)
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abort();
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}
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// This was defined at the beginning of this file.
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#undef write
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void LogErrorNotReached(const char* file, int line) {
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LogMessage(file, line, LOG_ERROR).stream()
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<< "NOTREACHED() hit.";
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}
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} // namespace logging
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