diff options
Diffstat (limited to 'sysdeps/generic/sbrk.c')
| -rw-r--r-- | sysdeps/generic/sbrk.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sysdeps/generic/sbrk.c b/sysdeps/generic/sbrk.c index de7794697d..698f814e2b 100644 --- a/sysdeps/generic/sbrk.c +++ b/sysdeps/generic/sbrk.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1995 Free Software Foundation, Inc. +/* Copyright (C) 1991, 1995, 1996 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 modify @@ -30,7 +30,11 @@ __sbrk (ptrdiff_t increment) { void *oldbrk; - if (__curbrk == 0 && __brk (0) < 0) + /* Always update __curbrk from the kernel's brk value. That way two + separate instances of __brk and __sbrk can share the heap, returning + interleaved pieces of it. This happens when libc.so is loaded by + dlopen in a statically-linked program that already uses __brk. */ + if (__brk (0) < 0) return (void *) -1; if (increment == 0) |