143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/**
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* @file debug.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @section DESCRIPTION
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*
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* Debugging macros.
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*/
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/**
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* @def DEBUG
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*
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* Macro for printing debugging text. Use the same way as printf,
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* but without a newline.
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* Prepends "function_name: " and appends a newline.
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*/
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/**
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* @def ASSERT_FORCE
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*
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* Macro for forced assertions.
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* Evaluates the argument and terminates the program abnormally
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* if the result is false.
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*/
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/**
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* @def ASSERT
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*
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* Macro for assertions.
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* The argument may or may not be evaluated.
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* If the argument is evaluated, it must not evaluate to false.
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*/
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/**
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* @def ASSERT_EXECUTE
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*
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* Macro for always-evaluated assertions.
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* The argument is evaluated.
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* The argument must not evaluate to false.
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*/
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/**
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* @def DEBUG_ZERO_MEMORY
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*
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* If debugging is enabled, zeroes the given memory region.
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* First argument is pointer to the memory region, second is
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* number of bytes.
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*/
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/**
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* @def WARN_UNUSED
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*
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* Tells the compiler that the result of a function should not be unused.
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* Insert at the end of the declaration of a function before the semicolon.
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*/
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/**
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* @def B_USE
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*
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* This can be used to suppress warnings about unused variables. It can
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* be applied to a variable or any expression. It does not evaluate the
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* expression.
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*/
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#ifndef BADVPN_MISC_DEBUG_H
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#define BADVPN_MISC_DEBUG_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 <stdint.h>
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#include <assert.h>
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#define DEBUG(...) \
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{ \
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fprintf(stderr, "%s: ", __FUNCTION__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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}
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#define ASSERT_FORCE(e) \
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{ \
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if (!(e)) { \
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fprintf(stderr, "%s:%d Assertion failed\n", __FILE__, __LINE__); \
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abort(); \
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} \
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}
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#ifdef NDEBUG
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#define DEBUG_ZERO_MEMORY(buf, len) {}
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#define ASSERT(e) {}
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#define ASSERT_EXECUTE(e) { (e); }
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#else
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#define DEBUG_ZERO_MEMORY(buf, len) { memset((buf), 0, (len)); }
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#ifdef BADVPN_USE_C_ASSERT
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#define ASSERT(e) { assert(e); }
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#define ASSERT_EXECUTE(e) \
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{ \
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int _assert_res = !!(e); \
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assert(_assert_res); \
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}
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#else
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#define ASSERT(e) ASSERT_FORCE(e)
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#define ASSERT_EXECUTE(e) ASSERT_FORCE(e)
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#endif
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#endif
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#ifdef __GNUC__
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#define WARN_UNUSED __attribute__((warn_unused_result))
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#else
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#define WARN_UNUSED
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#endif
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#define B_USE(expr) (void)(sizeof((expr)));
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#define B_ASSERT_USE(expr) { ASSERT(expr) B_USE(expr) }
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#endif
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