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* exceptions.cc (_cygtls::handle_exceptions): Call new

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mmap_is_attached_or_noreserve_page function in case of access violation
	and allow application to retry access on noreserve pages.
	* mmap.cc (mmap_is_attached_or_noreserve_page): Changed from
	mmap_is_attached_page.  Handle also noreserve pages now.  Change
	comment accordingly.
	* winsup.h (mmap_is_attached_or_noreserve_page): Declare instead of
	mmap_is_attached_page.
This commit is contained in:
Corinna Vinschen
2006-07-13 08:33:34 +00:00
parent d44b979536
commit f6105f89d5
4 changed files with 48 additions and 18 deletions
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14
winsup/cygwin/exceptions.cc
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@ -526,17 +526,21 @@ _cygtls::handle_exceptions (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT
break;
case STATUS_ACCESS_VIOLATION:
if (mmap_is_attached_page (e->ExceptionInformation[1]))
{
switch (mmap_is_attached_or_noreserve_page (e->ExceptionInformation[1]))
{
case 2: /* MAP_NORESERVE page, now commited. */
return 0;
case 1: /* MAP_NORESERVE page, commit failed, or
access to mmap page beyond EOF. */
si.si_signo = SIGBUS;
si.si_code = BUS_OBJERR;
}
else
{
break;
default:
MEMORY_BASIC_INFORMATION m;
VirtualQuery ((PVOID) e->ExceptionInformation[1], &m, sizeof m);
si.si_signo = SIGSEGV;
si.si_code = m.State == MEM_FREE ? SEGV_MAPERR : SEGV_ACCERR;
break;
}
break;