The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/common/logging.h

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+// Copyright (c) 2007, Google 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:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * 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.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 THE COPYRIGHT
+// OWNER 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.
+// logging.h: Breakpad logging
+//
+// Breakpad itself uses Breakpad logging with statements of the form:
+//   BPLOG(severity) << "message";
+// severity may be INFO, ERROR, or other values defined in this file.
+//
+// BPLOG is an overridable macro so that users can customize Breakpad's
+// logging.  Left at the default, logging messages are sent to stderr along
+// with a timestamp and the source code location that produced a message.
+// The streams may be changed by redefining BPLOG_*_STREAM, the logging
+// behavior may be changed by redefining BPLOG_*, and the entire logging
+// system may be overridden by redefining BPLOG(severity).  These
+// redefinitions may be passed to the preprocessor as a command-line flag
+// (-D).
+//
+// If an additional header is required to override Breakpad logging, it can
+// be specified by the BP_LOGGING_INCLUDE macro.  If defined, this header
+// will #include the header specified by that macro.
+//
+// If any initialization is needed before logging, it can be performed by
+// a function called through the BPLOG_INIT macro.  Each main function of
+// an executable program in the Breakpad processor library calls
+// BPLOG_INIT(&argc, &argv); before any logging can be performed; define
+// BPLOG_INIT appropriately if initialization is required.
+//
+// Author: Mark Mentovai
+#ifndef PROCESSOR_LOGGING_H__
+#define PROCESSOR_LOGGING_H__
+#include <iostream>
+#include <sstream>
+#include <string>
+#include "common/using_std_string.h"
+#include "google_breakpad/common/breakpad_types.h"
+#ifdef BP_LOGGING_INCLUDE
+#include BP_LOGGING_INCLUDE
+#endif  // BP_LOGGING_INCLUDE
+#ifndef THIRD_PARTY_BREAKPAD_GOOGLE_GLUE_LOGGING_H_
+namespace base_logging {
+// The open-source copy of logging.h has diverged from Google's internal copy
+// (temporarily, at least).  To support the transition to structured logging
+// a definition for base_logging::LogMessage is needed, which is a ostream-
+// like object for streaming arguments to construct a log message.
+typedef std::ostream LogMessage;
+}  // namespace base_logging
+#endif  // THIRD_PARTY_BREAKPAD_GOOGLE_GLUE_LOGGING_H_
+namespace google_breakpad {
+// These are defined in Microsoft headers.
+#ifdef SEVERITY_ERROR
+#undef SEVERITY_ERROR
+#endif
+#ifdef ERROR
+#undef ERROR
+#endif
+class LogStream {
+public:
+enum Severity {
+SEVERITY_INFO,
+SEVERITY_ERROR
+};
+// Begin logging a message to the stream identified by |stream|, at the
+// indicated severity.  The file and line parameters should be set so as to
+// identify the line of source code that is producing a message.
+LogStream(std::ostream &stream, Severity severity,
+const char *file, int line);
+// Finish logging by printing a newline and flushing the output stream.
+~LogStream();
+// Accumulate text in the str_.  It will be emitted to stream_ when
+// the object is destructed.
+template<typename T> std::ostream& operator<<(const T &t) {
+return str_ << t;
+}
+private:
+std::ostream &stream_;
+std::ostringstream str_;
+// Disallow copy constructor and assignment operator
+explicit LogStream(const LogStream &that);
+void operator=(const LogStream &that);
+};
+// This class is used to explicitly ignore values in the conditional logging
+// macros.  This avoids compiler warnings like "value computed is not used"
+// and "statement has no effect".
+class LogMessageVoidify {
+public:
+LogMessageVoidify() {}
+// This has to be an operator with a precedence lower than << but higher
+// than ?:
+void operator&(base_logging::LogMessage &) {}
+};
+// Returns number formatted as a hexadecimal string, such as "0x7b".
+string HexString(uint32_t number);
+string HexString(uint64_t number);
+string HexString(int number);
+// Returns the error code as set in the global errno variable, and sets
+// error_string, a required argument, to a string describing that error
+// code.
+int ErrnoString(string *error_string);
+}  // namespace google_breakpad
+// Useful for doing exponential backoff of error reporting
+bool is_power_of_2(uint64_t);
+#ifndef BPLOG_INIT
+#define BPLOG_INIT(pargc, pargv)
+#endif  // BPLOG_INIT
+#ifndef BPLOG
+#define BPLOG(severity) BPLOG_ ## severity
+#endif  // BPLOG
+#ifndef BPLOG_INFO
+#ifndef BPLOG_INFO_STREAM
+#define BPLOG_INFO_STREAM std::clog
+#endif  // BPLOG_INFO_STREAM
+#define BPLOG_INFO google_breakpad::LogStream(BPLOG_INFO_STREAM, \
+google_breakpad::LogStream::SEVERITY_INFO, \
+__FILE__, __LINE__)
+#endif  // BPLOG_INFO
+#ifndef BPLOG_ERROR
+#ifndef BPLOG_ERROR_STREAM
+#define BPLOG_ERROR_STREAM std::cerr
+#endif  // BPLOG_ERROR_STREAM
+#define BPLOG_ERROR google_breakpad::LogStream(BPLOG_ERROR_STREAM, \
+google_breakpad::LogStream::SEVERITY_ERROR, \
+__FILE__, __LINE__)
+#endif  // BPLOG_ERROR
+#define BPLOG_IF(severity, condition) \
+!(condition) ? (void) 0 : \
+google_breakpad::LogMessageVoidify() & BPLOG(severity)
+#endif  // PROCESSOR_LOGGING_H__

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comparison: toolkit/crashreporter/google-breakpad/src/common/logging.h

toolkit/crashreporter/google-breakpad/src/common/logging.h