130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 2011-2014 Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Debug aid
|
|
*
|
|
*
|
|
* The __ASSERT() macro can be used inside kernel code.
|
|
*
|
|
* Assertions are enabled by setting the __ASSERT_ON symbol to a non-zero value.
|
|
* There are two ways to do this:
|
|
* a) Use the ASSERT and ASSERT_LEVEL kconfig options
|
|
* b) Add "CFLAGS += -D__ASSERT_ON=<level>" at the end of a project's Makefile
|
|
* The Makefile method takes precedence over the kconfig option if both are
|
|
* used.
|
|
*
|
|
* Specifying an assertion level of 1 causes the compiler to issue warnings that
|
|
* the kernel contains debug-type __ASSERT() statements; this reminder is issued
|
|
* since assertion code is not normally present in a final product. Specifying
|
|
* assertion level 2 suppresses these warnings.
|
|
*
|
|
* The __ASSERT_EVAL() macro can also be used inside kernel code.
|
|
*
|
|
* It makes use of the __ASSERT() macro, but has some extra flexibility. It
|
|
* allows the developer to specify different actions depending whether the
|
|
* __ASSERT() macro is enabled or not. This can be particularly useful to
|
|
* prevent the compiler from generating comments (errors, warnings or remarks)
|
|
* about variables that are only used with __ASSERT() being assigned a value,
|
|
* but otherwise unused when the __ASSERT() macro is disabled.
|
|
*
|
|
* Consider the following example:
|
|
*
|
|
* int x;
|
|
*
|
|
* x = foo ();
|
|
* __ASSERT (x != 0, "foo() returned zero!");
|
|
*
|
|
* If __ASSERT() is disabled, then 'x' is assigned a value, but never used.
|
|
* This type of situation can be resolved using the __ASSERT_EVAL() macro.
|
|
*
|
|
* __ASSERT_EVAL ((void) foo(),
|
|
* int x = foo(),
|
|
* x != 0,
|
|
* "foo() returned zero!");
|
|
*
|
|
* The first parameter tells __ASSERT_EVAL() what to do if __ASSERT() is
|
|
* disabled. The second parameter tells __ASSERT_EVAL() what to do if
|
|
* __ASSERT() is enabled. The third and fourth parameters are the parameters
|
|
* it passes to __ASSERT().
|
|
*
|
|
* The __ASSERT_NO_MSG() macro can be used to perform an assertion that reports
|
|
* the failed test and its location, but lacks additional debugging information
|
|
* provided to assist the user in diagnosing the problem; its use is
|
|
* discouraged.
|
|
*/
|
|
|
|
#ifndef ___ASSERT__H_
|
|
#define ___ASSERT__H_
|
|
|
|
#ifdef CONFIG_ASSERT
|
|
#ifndef __ASSERT_ON
|
|
#define __ASSERT_ON CONFIG_ASSERT_LEVEL
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_FORCE_NO_ASSERT
|
|
#undef __ASSERT_ON
|
|
#define __ASSERT_ON 0
|
|
#endif
|
|
|
|
#ifdef __ASSERT_ON
|
|
#if (__ASSERT_ON < 0) || (__ASSERT_ON > 2)
|
|
#error "Invalid __ASSERT() level: must be between 0 and 2"
|
|
#endif
|
|
|
|
#if __ASSERT_ON
|
|
#include <misc/printk.h>
|
|
|
|
#if defined(CONFIG_ARCH_POSIX)
|
|
extern void posix_exit(int exit_code);
|
|
#define __ASSERT_POST posix_exit(1)
|
|
#else
|
|
#define __ASSERT_POST \
|
|
for (;;) { \
|
|
/* spin thread */ \
|
|
}
|
|
#endif
|
|
|
|
#define __ASSERT(test, fmt, ...) \
|
|
do { \
|
|
if (!(test)) { \
|
|
printk("ASSERTION FAIL [%s] @ %s:%d:\n\t", \
|
|
_STRINGIFY(test), \
|
|
__FILE__, \
|
|
__LINE__); \
|
|
printk(fmt, ##__VA_ARGS__); \
|
|
__ASSERT_POST; \
|
|
} \
|
|
} while ((0))
|
|
|
|
#define __ASSERT_EVAL(expr1, expr2, test, fmt, ...) \
|
|
do { \
|
|
expr2; \
|
|
__ASSERT(test, fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#if (__ASSERT_ON == 1)
|
|
#warning "__ASSERT() statements are ENABLED"
|
|
#endif
|
|
#else
|
|
#define __ASSERT(test, fmt, ...) \
|
|
do {/* nothing */ \
|
|
} while ((0))
|
|
#define __ASSERT_EVAL(expr1, expr2, test, fmt, ...) expr1
|
|
#endif
|
|
#else
|
|
#define __ASSERT(test, fmt, ...) \
|
|
do {/* nothing */ \
|
|
} while ((0))
|
|
#define __ASSERT_EVAL(expr1, expr2, test, fmt, ...) expr1
|
|
#endif
|
|
|
|
#define __ASSERT_NO_MSG(test) __ASSERT(test, "")
|
|
|
|
#endif /* ___ASSERT__H_ */
|