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Use mmap for allocation of buffers used for __abort_msg

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This commit is contained in:
Ulrich Drepper
2011-05-15 00:34:48 -04:00
parent fc317541ab
commit f8a3b5bf8f
9 changed files with 131 additions and 95 deletions
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54
assert/assert-perr.c
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@ -1,4 +1,5 @@
/* Copyright (C) 1994-1998,2001,2002,2005,2009 Free Software Foundation, Inc.
/* Copyright (C) 1994-1998,2001,2002,2005,2009,2011
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -17,66 +18,23 @@
02111-1307 USA. */
#include <assert.h>
#include <atomic.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
extern const char *__progname;
#ifdef USE_IN_LIBIO
# include <wchar.h>
# include <libio/iolibio.h>
# define fflush(s) INTUSE(_IO_fflush) (s)
#endif
/* This function, when passed an error number, a filename, and a line
number, prints a message on the standard error stream of the form:
a.c:10: foobar: Unexpected error: Computer bought the farm
a.c:10: foobar: Unexpected error: Computer bought the farm
It then aborts program execution via a call to `abort'. */
#ifdef FATAL_PREPARE_INCLUDE
# include FATAL_PREPARE_INCLUDE
#endif
void
__assert_perror_fail (int errnum,
const char *file, unsigned int line,
const char *function)
{
char errbuf[1024];
char *buf;
#ifdef FATAL_PREPARE
FATAL_PREPARE;
#endif
if (__asprintf (&buf, _("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
__progname, __progname[0] ? ": " : "",
file, line,
function ? function : "", function ? ": " : "",
__strerror_r (errnum, errbuf, sizeof errbuf)) >= 0)
{
/* Print the message. */
(void) __fxprintf (NULL, "%s", buf);
(void) fflush (stderr);
/* We have to free the old buffer since the application might
catch the SIGABRT signal. */
char *old = atomic_exchange_acq (&__abort_msg, buf);
free (old);
}
else
{
/* At least print a minimal message. */
static const char errstr[] = "Unexpected error.\n";
__libc_write (STDERR_FILENO, errstr, sizeof (errstr) - 1);
}
abort ();
char *e = __strerror_r (errnum, errbuf, sizeof errbuf);
__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
e, file, line, function);
}
libc_hidden_def (__assert_perror_fail)