• file
• revisions
• annotate
• diff
• comparison
• raw

security/sandbox/chromium/base/logging_win.cc@6474c204b198 (annotated)

security/sandbox/chromium/base/logging_win.cc

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	// Copyright (c) 2011 The Chromium Authors. All rights reserved.
michael@0	2	// Use of this source code is governed by a BSD-style license that can be
michael@0	3	// found in the LICENSE file.
michael@0	4
michael@0	5	#include "base/logging_win.h"
michael@0	6	#include "base/memory/singleton.h"
michael@0	7	#include <initguid.h> // NOLINT
michael@0	8
michael@0	9	namespace logging {
michael@0	10
michael@0	11	using base::win::EtwEventLevel;
michael@0	12	using base::win::EtwMofEvent;
michael@0	13
michael@0	14	DEFINE_GUID(kLogEventId,
michael@0	15	0x7fe69228, 0x633e, 0x4f06, 0x80, 0xc1, 0x52, 0x7f, 0xea, 0x23, 0xe3, 0xa7);
michael@0	16
michael@0	17	LogEventProvider::LogEventProvider() : old_log_level_(LOG_NONE) {
michael@0	18	}
michael@0	19
michael@0	20	LogEventProvider* LogEventProvider::GetInstance() {
michael@0	21	return Singleton<LogEventProvider,
michael@0	22	StaticMemorySingletonTraits<LogEventProvider> >::get();
michael@0	23	}
michael@0	24
michael@0	25	bool LogEventProvider::LogMessage(logging::LogSeverity severity,
michael@0	26	const char* file, int line, size_t message_start,
michael@0	27	const std::string& message) {
michael@0	28	EtwEventLevel level = TRACE_LEVEL_NONE;
michael@0	29
michael@0	30	// Convert the log severity to the most appropriate ETW trace level.
michael@0	31	if (severity >= 0) {
michael@0	32	switch (severity) {
michael@0	33	case LOG_INFO:
michael@0	34	level = TRACE_LEVEL_INFORMATION;
michael@0	35	break;
michael@0	36	case LOG_WARNING:
michael@0	37	level = TRACE_LEVEL_WARNING;
michael@0	38	break;
michael@0	39	case LOG_ERROR:
michael@0	40	case LOG_ERROR_REPORT:
michael@0	41	level = TRACE_LEVEL_ERROR;
michael@0	42	break;
michael@0	43	case LOG_FATAL:
michael@0	44	level = TRACE_LEVEL_FATAL;
michael@0	45	break;
michael@0	46	}
michael@0	47	} else { // severity < 0 is VLOG verbosity levels.
michael@0	48	level = TRACE_LEVEL_INFORMATION - severity;
michael@0	49	}
michael@0	50
michael@0	51	// Bail if we're not logging, not at that level,
michael@0	52	// or if we're post-atexit handling.
michael@0	53	LogEventProvider* provider = LogEventProvider::GetInstance();
michael@0	54	if (provider == NULL || level > provider->enable_level())
michael@0	55	return false;
michael@0	56
michael@0	57	// And now log the event.
michael@0	58	if (provider->enable_flags() & ENABLE_LOG_MESSAGE_ONLY) {
michael@0	59	EtwMofEvent<1> event(kLogEventId, LOG_MESSAGE, level);
michael@0	60	event.SetField(0, message.length() + 1 - message_start,
michael@0	61	message.c_str() + message_start);
michael@0	62
michael@0	63	provider->Log(event.get());
michael@0	64	} else {
michael@0	65	const size_t kMaxBacktraceDepth = 32;
michael@0	66	void* backtrace[kMaxBacktraceDepth];
michael@0	67	DWORD depth = 0;
michael@0	68
michael@0	69	// Capture a stack trace if one is requested.
michael@0	70	// requested per our enable flags.
michael@0	71	if (provider->enable_flags() & ENABLE_STACK_TRACE_CAPTURE)
michael@0	72	depth = CaptureStackBackTrace(2, kMaxBacktraceDepth, backtrace, NULL);
michael@0	73
michael@0	74	EtwMofEvent<5> event(kLogEventId, LOG_MESSAGE_FULL, level);
michael@0	75	if (file == NULL)
michael@0	76	file = "";
michael@0	77
michael@0	78	// Add the stack trace.
michael@0	79	event.SetField(0, sizeof(depth), &depth);
michael@0	80	event.SetField(1, sizeof(backtrace[0]) * depth, &backtrace);
michael@0	81	// The line.
michael@0	82	event.SetField(2, sizeof(line), &line);
michael@0	83	// The file.
michael@0	84	event.SetField(3, strlen(file) + 1, file);
michael@0	85	// And finally the message.
michael@0	86	event.SetField(4, message.length() + 1 - message_start,
michael@0	87	message.c_str() + message_start);
michael@0	88
michael@0	89	provider->Log(event.get());
michael@0	90	}
michael@0	91
michael@0	92	// Don't increase verbosity in other log destinations.
michael@0	93	if (severity < provider->old_log_level_)
michael@0	94	return true;
michael@0	95
michael@0	96	return false;
michael@0	97	}
michael@0	98
michael@0	99	void LogEventProvider::Initialize(const GUID& provider_name) {
michael@0	100	LogEventProvider* provider = LogEventProvider::GetInstance();
michael@0	101
michael@0	102	provider->set_provider_name(provider_name);
michael@0	103	provider->Register();
michael@0	104
michael@0	105	// Register our message handler with logging.
michael@0	106	SetLogMessageHandler(LogMessage);
michael@0	107	}
michael@0	108
michael@0	109	void LogEventProvider::Uninitialize() {
michael@0	110	LogEventProvider::GetInstance()->Unregister();
michael@0	111	}
michael@0	112
michael@0	113	void LogEventProvider::OnEventsEnabled() {
michael@0	114	// Grab the old log level so we can restore it later.
michael@0	115	old_log_level_ = GetMinLogLevel();
michael@0	116
michael@0	117	// Convert the new trace level to a logging severity
michael@0	118	// and enable logging at that level.
michael@0	119	EtwEventLevel level = enable_level();
michael@0	120	if (level == TRACE_LEVEL_NONE || level == TRACE_LEVEL_FATAL) {
michael@0	121	SetMinLogLevel(LOG_FATAL);
michael@0	122	} else if (level == TRACE_LEVEL_ERROR) {
michael@0	123	SetMinLogLevel(LOG_ERROR);
michael@0	124	} else if (level == TRACE_LEVEL_WARNING) {
michael@0	125	SetMinLogLevel(LOG_WARNING);
michael@0	126	} else if (level == TRACE_LEVEL_INFORMATION) {
michael@0	127	SetMinLogLevel(LOG_INFO);
michael@0	128	} else if (level >= TRACE_LEVEL_VERBOSE) {
michael@0	129	// Above INFO, we enable verbose levels with negative severities.
michael@0	130	SetMinLogLevel(TRACE_LEVEL_INFORMATION - level);
michael@0	131	}
michael@0	132	}
michael@0	133
michael@0	134	void LogEventProvider::OnEventsDisabled() {
michael@0	135	// Restore the old log level.
michael@0	136	SetMinLogLevel(old_log_level_);
michael@0	137	}
michael@0	138
michael@0	139	} // namespace logging