tsan: special handling of .rodata (don't try to find races, don't keep shadow, dont' put into traces)
llvm-svn: 177517
diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
index 3be9b83..e93a7a3 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
@@ -298,6 +298,13 @@
StatInc(thr, StatMopRange);
+ if (*shadow_mem == kShadowRodata) {
+ // Access to .rodata section, no races here.
+ // Measurements show that it can be 10-20% of all memory accesses.
+ StatInc(thr, StatMopRangeRodata);
+ return;
+ }
+
FastState fast_state = thr->fast_state;
if (fast_state.GetIgnoreBit())
return;