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/*
* Phusion Passenger - https://www.phusionpassenger.com/
* Copyright (c) 2017 Phusion Holding B.V.
*
* "Passenger", "Phusion Passenger" and "Union Station" are registered
* trademarks of Phusion Holding B.V.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _PASSENGER_LOGGING_KIT_ASSERT_H_
#define _PASSENGER_LOGGING_KIT_ASSERT_H_
#include <oxt/backtrace.hpp>
#include <cstddef>
#include <cstdlib>
#include <LoggingKit/Logging.h>
#include <Utils/FastStringStream.h>
namespace Passenger {
namespace LoggingKit {
struct AssertionFailureInfo {
const char *filename;
const char *function; // May be NULL.
const char *expression;
unsigned int line;
AssertionFailureInfo()
: filename(NULL),
function(NULL),
expression(NULL),
line(0)
{ }
};
// If assert() or similar fails, we attempt to store its information here.
extern AssertionFailureInfo lastAssertionFailure;
/*
* The P_BUG family of macros allow you to print a [BUG] error message
* and abort with a stack trace.
*
* P_BUG(expr)
* Prints the given expression and aborts.
*
* P_BUG_WITH_FORMATTER_CODE(varname, code)
* Same effect as P_BUG, but it allows more fine-grained control over the behavior.
* This macro declares the internal string stream object with a name defined by `varname`,
* and evaluates the `code`. The given code is supposed to use `<<` calls to append
* add text into the stream.
* When the code is done evaluating, this macro prints the string stream and aborts.
*
* P_BUG_UTP(expr)
* P_BUG_UTP_WITH_FORMATTER_CODE(varname, code)
* Like P_BUG/P_BUG_WITH_FORMATTER_CODE, but instead of allocating a `TRACE_POINT()`
* (which may conflict if the calling function already has one defined), it calls
* `UPDATE_TRACE_POINT()` instead.
*/
/** Print a [BUG] error message and abort with a stack trace. */
#define P_BUG_WITH_FORMATTER_CODE(varname, code) \
do { \
TRACE_POINT(); \
const char *_exprStr; \
Passenger::FastStringStream<> varname; \
code \
_exprStr = Passenger::LoggingKit::_strdupFastStringStream(varname); \
Passenger::LoggingKit::lastAssertionFailure.filename = __FILE__; \
Passenger::LoggingKit::lastAssertionFailure.line = __LINE__; \
Passenger::LoggingKit::lastAssertionFailure.function = __PRETTY_FUNCTION__; \
Passenger::LoggingKit::lastAssertionFailure.expression = _exprStr; \
P_CRITICAL("[BUG] " << _exprStr); \
abort(); \
} while (false)
#define P_BUG_UTP_WITH_FORMATTER_CODE(varname, code) \
do { \
UPDATE_TRACE_POINT(); \
const char *_exprStr; \
Passenger::FastStringStream<> varname; \
code \
_exprStr = Passenger::LoggingKit::_strdupFastStringStream(varname); \
Passenger::LoggingKit::lastAssertionFailure.filename = __FILE__; \
Passenger::LoggingKit::lastAssertionFailure.line = __LINE__; \
Passenger::LoggingKit::lastAssertionFailure.function = __PRETTY_FUNCTION__; \
Passenger::LoggingKit::lastAssertionFailure.expression = _exprStr; \
P_CRITICAL("[BUG] " << _exprStr); \
abort(); \
} while (false)
#define P_BUG(expr) P_BUG_WITH_FORMATTER_CODE( _sstream , _sstream << expr; )
#define P_BUG_UTP(expr) P_BUG_UTP_WITH_FORMATTER_CODE( _sstream , _sstream << expr; )
/**
* Asserts whether the actual value equals the expected value.
* If not, it prints a message that prints how the two values differ
* and aborts.
*/
#define P_ASSERT_EQ(value, expected) \
do { \
if (OXT_UNLIKELY(value != expected)) { \
P_BUG("Expected " << #value << " to be " << expected << ", got " << value); \
} \
} while (false)
} // namespace LoggingKit
} // namespace Passenger
#endif /* _PASSENGER_LOGGING_KIT_ASSERT_H_ */
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