Author: davidxu
Date: Thu Apr 18 05:12:11 2013
New Revision: 249604
URL: http://svnweb.freebsd.org/changeset/base/249604
Log:
Revert revision 249323, the PR/177624 is confusing, that bug is caused
by using buggy getcontext/setcontext on same stack, while swapcontext
normally works on different stack, there is no such a problem.
Modified:
head/lib/libthr/thread/thr_sig.c
Modified: head/lib/libthr/thread/thr_sig.c
==============================================================================
--- head/lib/libthr/thread/thr_sig.c Thu Apr 18 02:20:58 2013
(r249603)
+++ head/lib/libthr/thread/thr_sig.c Thu Apr 18 05:12:11 2013
(r249604)
@@ -737,4 +737,13 @@ _setcontext(const ucontext_t *ucp)
return __sys_setcontext(&uc);
}
-__weak_reference(__sys_swapcontext, swapcontext);
+__weak_reference(_swapcontext, swapcontext);
+int
+_swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
+{
+ ucontext_t uc;
+
+ (void) memcpy(&uc, ucp, sizeof(uc));
+ remove_thr_signals(&uc.uc_sigmask);
+ return __sys_swapcontext(oucp, &uc);
+}
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