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authorUlrich Drepper <drepper@gmail.com>2011-05-15 00:34:48 -0400
committerUlrich Drepper <drepper@gmail.com>2011-05-15 00:34:48 -0400
commitf8a3b5bf8fa1d0c43d2458e03cc109a04fdef194 (patch)
treec92e262e52b730a8bd4bc3505f46ded142b7cebd /assert
parentfc317541ab359b33ed7bf402ead84ba6f112604c (diff)
downloadglibc-f8a3b5bf8fa1d0c43d2458e03cc109a04fdef194.tar.gz
Use mmap for allocation of buffers used for __abort_msg
Diffstat (limited to 'assert')
-rw-r--r--assert/assert-perr.c54
-rw-r--r--assert/assert.c51
2 files changed, 44 insertions, 61 deletions
diff --git a/assert/assert-perr.c b/assert/assert-perr.c
index f239fab86b..cad87dab0d 100644
--- a/assert/assert-perr.c
+++ b/assert/assert-perr.c
@@ -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)
diff --git a/assert/assert.c b/assert/assert.c
index 727fb1446c..803015f0f4 100644
--- a/assert/assert.c
+++ b/assert/assert.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009
+/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009,2011
Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -19,11 +19,13 @@
#include <assert.h>
#include <atomic.h>
+#include <ldsodefs.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysdep.h>
#include <unistd.h>
+#include <sys/mman.h>
extern const char *__progname;
@@ -37,7 +39,7 @@ extern const char *__progname;
/* This function, when passed a string containing an asserted
expression, a filename, and a line number, prints a message
on the standard error stream of the form:
- a.c:10: foobar: Assertion `a == b' failed.
+ a.c:10: foobar: Assertion `a == b' failed.
It then aborts program execution via a call to `abort'. */
#ifdef FATAL_PREPARE_INCLUDE
@@ -45,31 +47,44 @@ extern const char *__progname;
#endif
-#undef __assert_fail
void
-__assert_fail (const char *assertion, const char *file, unsigned int line,
- const char *function)
+__assert_fail_base (const char *fmt, const char *assertion, const char *file,
+ unsigned int line, const char *function)
{
- char *buf;
+ char *str;
#ifdef FATAL_PREPARE
FATAL_PREPARE;
#endif
- if (__asprintf (&buf, _("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
+ int total;
+ if (__asprintf (&str, fmt,
__progname, __progname[0] ? ": " : "",
file, line,
function ? function : "", function ? ": " : "",
- assertion) >= 0)
+ assertion, &total) >= 0)
{
/* Print the message. */
- (void) __fxprintf (NULL, "%s", buf);
+ (void) __fxprintf (NULL, "%s", str);
(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);
+ total = (total + 1 + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
+ struct abort_msg_s *buf = __mmap (NULL, total, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_PRIVATE, -1, 0);
+ if (__builtin_expect (buf != MAP_FAILED, 1))
+ {
+ buf->size = total;
+ strcpy (buf->msg, str);
+
+ /* We have to free the old buffer since the application might
+ catch the SIGABRT signal. */
+ struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg, buf);
+
+ if (old != NULL)
+ __munmap (old, old->size);
+ }
+
+ free (str);
}
else
{
@@ -80,4 +95,14 @@ __assert_fail (const char *assertion, const char *file, unsigned int line,
abort ();
}
+
+
+#undef __assert_fail
+void
+__assert_fail (const char *assertion, const char *file, unsigned int line,
+ const char *function)
+{
+ __assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n%n"),
+ assertion, file, line, function);
+}
hidden_def(__assert_fail)