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* malloc/memusage.c (update_data): Fix handling of wrapping back

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to the beginning of the buffer.
This commit is contained in:
Ulrich Drepper 2009-02-06 18:24:23 +00:00
parent 2191e7ffa2
commit c3ab42a82d
2 changed files with 8 additions and 3 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2009-02-06 Ulrich Drepper <drepper@redhat.com>
* malloc/memusage.c (update_data): Fix handling of wrapping back
to the beginning of the buffer.
[BZ #9823]
* stdio-common/psignal.c (psignal): Fix test for empty string.

8
malloc/memusage.c
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@ -1,5 +1,5 @@
/* Profile heap and stack memory usage of running program.
Copyright (C) 1998-2002, 2004, 2005, 2006 Free Software Foundation, Inc.
Copyright (C) 1998-2002, 2004-2006, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
@ -18,6 +18,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <atomic.h>
#include <dlfcn.h>
#include <errno.h>
@ -168,10 +169,11 @@ update_data (struct header *result, size_t len, size_t old_len)
this fails because of another thread increasing the
counter it does not matter since that thread will take
care of the correction. */
unsigned int reset = idx - 2 * buffer_size;
catomic_compare_and_exchange_val_acq (&buffer_size, reset, idx);
uatomic32_t reset = idx % (2 * buffer_size);
catomic_compare_and_exchange_val_acq (&buffer_cnt, reset, idx);
idx = reset;
}
assert (idx < 2 * DEFAULT_BUFFER_SIZE);
buffer[idx].heap = current_heap;
buffer[idx].stack = current_stack;