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

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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 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 the guardpage size from the pthread attribs, otherwise we use the
system default. */ 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) ch.guardsize = (&_my_tls != _main_tls && _my_tls.tid)
? _my_tls.tid->attr.guardsize ? _my_tls.tid->attr.guardsize
: wincap.def_guard_page_size (); : wincap.def_guard_page_size ();