From b613150da40c2afd800e99fd1e032eeeb8016160 Mon Sep 17 00:00:00 2001 From: Ivan Maidanski Date: Thu, 23 Nov 2017 02:25:05 +0300 Subject: [PATCH] Revert 'Workaround TSan false positives in suspend/resume_thread' This reverts commit 918500dcd5f629391e442f68620873909c733ea7. Because it just hides the data race issues in GC_suspend/resume_thread. --- pthread_stop_world.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-) diff --git a/pthread_stop_world.c b/pthread_stop_world.c index 4eba05c..7d53234 100644 --- a/pthread_stop_world.c +++ b/pthread_stop_world.c @@ -447,17 +447,6 @@ STATIC void GC_restart_handler(int sig) return NULL; } - /* TSan reports data races between the suspension flag setter */ - /* (called from GC_suspend_thread) and GC_suspend_handler_inner, */ - /* suspend_self_inner. The first one seems to be a false positive */ - /* as the handler is invoked after RAISE_SIGNAL, and the 2nd one is */ - /* safe to be ignored as the flag is checked in a loop. */ - GC_ATTR_NO_SANITIZE_THREAD - static void set_suspended_ext_flag(GC_thread t) - { - t -> flags |= SUSPENDED_EXT; - } - GC_API void GC_CALL GC_suspend_thread(GC_SUSPEND_THREAD_ID thread) { GC_thread t; IF_CANCEL(int cancel_state;) @@ -470,7 +459,7 @@ STATIC void GC_restart_handler(int sig) return; } - set_suspended_ext_flag(t); + t -> flags |= SUSPENDED_EXT; if ((pthread_t)thread == pthread_self()) { UNLOCK(); /* It is safe as "t" cannot become invalid here (no race with */ @@ -518,10 +507,6 @@ STATIC void GC_restart_handler(int sig) UNLOCK(); } - /* Same as for GC_suspend_thread(), TSan reports data races between */ - /* this function and GC_suspend_handler_inner, suspend_self_inner; */ - /* it is safe to ignore them both. */ - GC_ATTR_NO_SANITIZE_THREAD GC_API void GC_CALL GC_resume_thread(GC_SUSPEND_THREAD_ID thread) { GC_thread t; DCL_LOCK_STATE; -- 2.7.4