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* malloc/malloc.c (sYSMALLOc): Don't use assert when detecting

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manipulated brk, use malloc_printerr.
	* misc/sbrk.c (__sbrk): Better error handling for nonsense
	requests.
This commit is contained in:
Ulrich Drepper 2009-01-30 17:47:23 +00:00
parent 8585cb7454
commit 1fdd89a78d
4 changed files with 21 additions and 7 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2009-01-30 Ulrich Drepper <drepper@redhat.com>
* malloc/malloc.c (sYSMALLOc): Don't use assert when detecting
manipulated brk, use malloc_printerr.
* misc/sbrk.c (__sbrk): Better error handling for nonsense
requests.
2009-01-30 Jakub Jelinek <jakub@redhat.com>
* string/string.h (memchr, strchr, strrchr, strpbrk, strstr, index,

7
NEWS
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@ -1,5 +1,5 @@
GNU C Library NEWS -- history of user-visible changes. 2008-12-2
Copyright (C) 1992-2007, 2008 Free Software Foundation, Inc.
GNU C Library NEWS -- history of user-visible changes. 2009-1-30
Copyright (C) 1992-2008, 2009 Free Software Foundation, Inc.
See the end for copying conditions.
Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
@ -9,6 +9,9 @@ Version 2.10
* New Linux interface: accept4
* Correct declarations of string function when used in C++ code. This
could lead to compile error for invalid C++ code.
Version 2.9

4
malloc/malloc.c
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@ -1,5 +1,5 @@
/* Malloc implementation for multiple threads without lock contention.
Copyright (C) 1996-2006, 2007, 2008 Free Software Foundation, Inc.
Copyright (C) 1996-2006, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wg@malloc.de>
and Doug Lea <dl@cs.oswego.edu>, 2001.
@ -3189,7 +3189,7 @@ static Void_t* sYSMALLOc(nb, av) INTERNAL_SIZE_T nb; mstate av;
else if (contiguous(av) && old_size && brk < old_end) {
/* Oops! Someone else killed our space.. Can't touch anything. */
assert(0);
malloc_printerr (3, "break adjusted to free malloc space", brk);
}
/*

10
misc/sbrk.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1991,1995,1996,1997,2000,2002 Free Software Foundation, Inc.
/* Copyright (C) 1991,1995-1997,2000,2002,2009 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
@ -16,8 +16,9 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <unistd.h>
#include <errno.h>
#include <stdint.h>
#include <unistd.h>
/* Defined in brk.c. */
extern void *__curbrk;
@ -47,7 +48,10 @@ __sbrk (intptr_t increment)
return __curbrk;
oldbrk = __curbrk;
if (__brk (oldbrk + increment) < 0)
if ((increment > 0
? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk)
: ((uintptr_t) oldbrk < (uintptr_t) -increment))
|| __brk (oldbrk + increment) < 0)
return (void *) -1;
return oldbrk;