libs/newlib-cygwin
libs/newlib-cygwin
4
0
Fork 0
mirror of git://sourceware.org/git/newlib-cygwin.git synced 2025-03-02 13:05:42 +08:00
Code Issues Projects Releases Wiki Activity

Add comment to sigaltstack to explain setting ss_flags here

Browse Source 
* signal.cc (sigaltstack): Add comment.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2015-06-30 20:43:50 +02:00
parent 166d86c9d4
commit 0f3e631571
2 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,7 @@
2015-06-30 Corinna Vinschen <corinna@vinschen.de>
* signal.cc (sigaltstack): Add comment.
2015-06-27 Corinna Vinschen <corinna@vinschen.de> 2015-06-27 Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (_cygtls::call_signal_handler): Drop manipulating * exceptions.cc (_cygtls::call_signal_handler): Drop manipulating

4
winsup/cygwin/signal.cc
View File

@ -670,6 +670,10 @@ sigaltstack (const stack_t *ss, stack_t *oss)
{ {
char stack_marker; char stack_marker;
memcpy (oss, &me.altstack, sizeof *oss); memcpy (oss, &me.altstack, sizeof *oss);
/* Check if the current stack is the alternate signal stack. If so,
set ss_flags accordingly. We do this here rather than setting
ss_flags in _cygtls::call_signal_handler since the signal handler
calls longjmp, so we never return to reset the flag. */
if (!me.altstack.ss_flags && me.altstack.ss_sp) if (!me.altstack.ss_flags && me.altstack.ss_sp)
{ {
if (&stack_marker >= (char *) me.altstack.ss_sp if (&stack_marker >= (char *) me.altstack.ss_sp