ASSERT(9F) Kernel Functions for Drivers ASSERT(9F)NAME
ASSERT, assert - expression verification
SYNOPSIS
#include <sys/debug.h>
void ASSERT(EX);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
EX boolean expression.
DESCRIPTION
ASSERT() is a macro which checks to see if the expression EX is true. If it is not, then ASSERT() causes an error message to be logged to
the console and the system to panic. ASSERT() works only if the preprocessor symbol DEBUG is defined.
CONTEXT
ASSERT() can be used from user or interrupt context.
SEE ALSO
Writing Device Drivers
SunOS 5.10 11 Apr 1991 ASSERT(9F)
Check Out this Related Man Page
ASSERT(3) Linux Programmer's Manual ASSERT(3)NAME
assert - abort the program if assertion is false
SYNOPSIS
#include <assert.h>
void assert(scalar expression);
DESCRIPTION
If the macro NDEBUG was defined at the moment <assert.h> was last included, the macro assert() generates no code, and hence does nothing at
all. Otherwise, the macro assert() prints an error message to standard error and terminates the program by calling abort(3) if expression
is false (i.e., compares equal to zero).
The purpose of this macro is to help the programmer find bugs in his program. The message "assertion failed in file foo.c, function
do_bar(), line 1287" is of no help at all to a user.
RETURN VALUE
No value is returned.
CONFORMING TO
POSIX.1-2001, C89, C99. In C89, expression is required to be of type int and undefined behavior results if it is not, but in C99 it may
have any scalar type.
BUGS
assert() is implemented as a macro; if the expression tested has side-effects, program behavior will be different depending on whether NDE-
BUG is defined. This may create Heisenbugs which go away when debugging is turned on.
SEE ALSO abort(3), assert_perror(3), exit(3)COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2002-08-25 ASSERT(3)
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