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Check for signals to be delivered after every syscall. This avoids

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some obscure deadlock cases.  (Neil Conway).


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@487
This commit is contained in:
Julian Seward
2002-07-12 01:23:03 +00:00
parent 3bf5e6d313
commit e666ed6444
2 changed files with 20 additions and 6 deletions
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13
coregrind/vg_scheduler.c
View File

@@ -1368,10 +1368,17 @@ VgSchedReturnCode VG_(scheduler) ( void )
}
# endif
if (VG_(threads)[tid].status == VgTs_Runnable)
if (VG_(threads)[tid].status == VgTs_Runnable) {
/* Better do a signal check, since if in a tight loop
with a slow syscall it may be a very long time
before we get back to the main signal check in Stage 1. */
sigs_delivered = VG_(deliver_signals)();
if (sigs_delivered)
VG_(do_sanity_checks)( False );
continue; /* with this thread */
else
goto stage1;
} else {
goto stage1;
}
}
/* It's an event we can't quickly deal with. Give up running

13
vg_scheduler.c
View File

@@ -1368,10 +1368,17 @@ VgSchedReturnCode VG_(scheduler) ( void )
}
# endif
if (VG_(threads)[tid].status == VgTs_Runnable)
if (VG_(threads)[tid].status == VgTs_Runnable) {
/* Better do a signal check, since if in a tight loop
with a slow syscall it may be a very long time
before we get back to the main signal check in Stage 1. */
sigs_delivered = VG_(deliver_signals)();
if (sigs_delivered)
VG_(do_sanity_checks)( False );
continue; /* with this thread */
else
goto stage1;
} else {
goto stage1;
}
}
/* It's an event we can't quickly deal with. Give up running