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* malloc/malloc.c (sYSMALLOc): Avoid infinite loop if MMAP

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keeps failing and heap growth or new heap creation isn't
	successful either.
	* malloc/tst-malloc.c (main): Add new tests.
This commit is contained in:
Ulrich Drepper
2006-08-24 17:30:37 +00:00
parent 542a6f62af
commit 7463d5cb4d
3 changed files with 21 additions and 2 deletions
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4
malloc/malloc.c
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@ -2860,6 +2860,7 @@ static Void_t* sYSMALLOc(nb, av) INTERNAL_SIZE_T nb; mstate av;
unsigned long sum; /* for updating stats */
size_t pagemask = mp_.pagesize - 1;
bool tried_mmap = false;
#if HAVE_MMAP
@ -2883,6 +2884,7 @@ static Void_t* sYSMALLOc(nb, av) INTERNAL_SIZE_T nb; mstate av;
is no following chunk whose prev_size field could be used.
*/
size = (nb + SIZE_SZ + MALLOC_ALIGN_MASK + pagemask) & ~pagemask;
tried_mmap = true;
/* Don't try if size wraps around 0 */
if ((unsigned long)(size) > (unsigned long)(nb)) {
@ -3006,7 +3008,7 @@ static Void_t* sYSMALLOc(nb, av) INTERNAL_SIZE_T nb; mstate av;
set_foot(old_top, (old_size + 2*SIZE_SZ));
}
}
else
else if (!tried_mmap)
/* We can at least try to use to mmap memory. */
goto try_mmap;