glibc/include/assert.h
Florian Weimer 9001cb1102 assert: Do not use stderr in libc-internal assert
Redirect internal assertion failures to __libc_assert_fail, based on
based on __libc_message, which writes directly to STDERR_FILENO
and calls abort.  Also disable message translation and reword the
error message slightly (adjusting stdlib/tst-bz20544 accordingly).

As a result of these changes, malloc no longer needs its own
redefinition of __assert_fail.

__libc_assert_fail needs to be stubbed out during rtld dependency
analysis because the rtld rebuilds turn __libc_assert_fail into
__assert_fail, which is unconditionally provided by elf/dl-minimal.c.

This change is not possible for the public assert macro and its
__assert_fail function because POSIX requires that the diagnostic
is written to stderr.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-08-03 11:43:04 +02:00

34 lines
1.2 KiB
C

#include <assert/assert.h>
#ifndef _ISOMAC
/* This prints an "Assertion failed" message and aborts.
In installed assert.h this is only conditionally declared,
so it has to be repeated here. */
extern void __assert_fail (const char *__assertion, const char *__file,
unsigned int __line, const char *__function)
__THROW __attribute__ ((__noreturn__));
/* Likewise, but prints the error text for ERRNUM. */
extern void __assert_perror_fail (int __errnum, const char *__file,
unsigned int __line,
const char *__function)
__THROW __attribute__ ((__noreturn__));
/* The real implementation of the two functions above. */
extern void __assert_fail_base (const char *fmt, const char *assertion,
const char *file, unsigned int line,
const char *function)
__THROW __attribute__ ((__noreturn__)) attribute_hidden;
rtld_hidden_proto (__assert_fail)
rtld_hidden_proto (__assert_perror_fail)
libc_hidden_proto (__assert_perror_fail)
# if IS_IN (libc)
/* Redirect to the internal version which does not use stderr. */
extern _Noreturn __typeof (__assert_fail) __libc_assert_fail attribute_hidden;
# define __assert_fail __libc_assert_fail
# endif
#endif