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Cygwin: Fixing the math behind rounding down ch.stacklimit to page size.

This commit is contained in:
Sergejs Lukanihins 2018-05-25 17:27:21 +01:00 committed by Corinna Vinschen
parent 53960db861
commit 06797545b3
1 changed files with 1 additions and 1 deletions
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winsup/cygwin/fork.cc
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@ -316,7 +316,7 @@ frok::parent (volatile char * volatile stack_here)
on whether we're running on a pthread or not. If pthread, we fetch
the guardpage size from the pthread attribs, otherwise we use the
system default. */
ch.stacklimit = (void *) ((uintptr_t) stack_here & ~wincap.page_size ());
ch.stacklimit = (void *) ((uintptr_t) stack_here & ~(wincap.page_size () - 1));
ch.guardsize = (&_my_tls != _main_tls && _my_tls.tid)
? _my_tls.tid->attr.guardsize
: wincap.def_guard_page_size ();