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Update the guarded heap areas after fork.

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We don't actually use them for anything yet though.
This commit is contained in:
Michael Lotz 2011-12-10 17:16:55 +01:00
parent 3cb6104e08
commit 3de380692a
1 changed files with 21 additions and 0 deletions
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21
src/system/libroot/posix/malloc_debug/guarded_heap.cpp
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@ -890,6 +890,20 @@ heap_debug_get_allocation_info(void *address, size_t *size,
// #pragma mark - Init
static void
init_after_fork()
{
// The memory has actually been copied (or is in a copy on write state) but
// but the area ids have changed.
for (guarded_heap_area* area = sGuardedHeap.areas; area != NULL;
area = area->next) {
area->area = area_for(area);
if (area->area < 0)
panic("failed to find area for heap area %p after fork", area);
}
}
extern "C" status_t
__init_heap(void)
{
@ -904,6 +918,13 @@ __init_heap(void)
sigemptyset(&action.sa_mask);
sigaction(SIGSEGV, &action, NULL);
atfork(&init_after_fork);
// Note: Needs malloc(). Hence we need to be fully initialized.
// TODO: We should actually also install a hook that is called before
// fork() is being executed. In a multithreaded app it would need to
// acquire *all* allocator locks, so that we don't fork() an
// inconsistent state.
return B_OK;
}