From ea4f1990e1717fcd2952a27d323fadefe7a976da Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Wed, 7 Nov 2012 16:14:12 +0000
Subject: [PATCH] tsan: add flag to suppress all reports (useful for
 benchmarking)

llvm-svn: 167532
---
 compiler-rt/lib/tsan/rtl/tsan_flags.cc        | 8 ++++++++
 compiler-rt/lib/tsan/rtl/tsan_flags.h         | 2 ++
 compiler-rt/lib/tsan/rtl/tsan_interceptors.cc | 2 +-
 compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc   | 2 ++
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/lib/tsan/rtl/tsan_flags.cc b/compiler-rt/lib/tsan/rtl/tsan_flags.cc
index eb3de9e..7412c50 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_flags.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_flags.cc
@@ -40,6 +40,7 @@ void InitializeFlags(Flags *f, const char *env) {
   f->enable_annotations = true;
   f->suppress_equal_stacks = true;
   f->suppress_equal_addresses = true;
+  f->report_bugs = true;
   f->report_thread_leaks = true;
   f->report_destroy_locked = true;
   f->report_signal_unsafe = true;
@@ -63,6 +64,7 @@ void InitializeFlags(Flags *f, const char *env) {
   ParseFlag(env, &f->enable_annotations, "enable_annotations");
   ParseFlag(env, &f->suppress_equal_stacks, "suppress_equal_stacks");
   ParseFlag(env, &f->suppress_equal_addresses, "suppress_equal_addresses");
+  ParseFlag(env, &f->report_bugs, "report_bugs");
   ParseFlag(env, &f->report_thread_leaks, "report_thread_leaks");
   ParseFlag(env, &f->report_destroy_locked, "report_destroy_locked");
   ParseFlag(env, &f->report_signal_unsafe, "report_signal_unsafe");
@@ -77,6 +79,12 @@ void InitializeFlags(Flags *f, const char *env) {
   ParseFlag(env, &f->flush_memory_ms, "flush_memory_ms");
   ParseFlag(env, &f->stop_on_start, "stop_on_start");
   ParseFlag(env, &f->external_symbolizer_path, "external_symbolizer_path");
+
+  if (!f->report_bugs) {
+    f->report_thread_leaks = false;
+    f->report_destroy_locked = false;
+    f->report_signal_unsafe = false;
+  }
 }
 
 }  // namespace __tsan
diff --git a/compiler-rt/lib/tsan/rtl/tsan_flags.h b/compiler-rt/lib/tsan/rtl/tsan_flags.h
index 929e6f5..895cef8 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_flags.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_flags.h
@@ -31,6 +31,8 @@ struct Flags {
   // Supress a race report if we've already output another race report
   // on the same address.
   bool suppress_equal_addresses;
+  // Turns off bug reporting entirely (useful for benchmarking).
+  bool report_bugs;
   // Report thread leaks at exit?
   bool report_thread_leaks;
   // Report destruction of a locked mutex?
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors.cc b/compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
index 70476b1..403340e 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
@@ -1344,7 +1344,7 @@ static void process_pending_signals(ThreadState *thr) {
           sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx);
         else
           sigactions[sig].sa_handler(sig);
-        if (errno != 0) {
+        if (flags()->report_bugs && errno != 0) {
           ScopedInRtl in_rtl;
           __tsan::StackTrace stack;
           uptr pc = signal->sigaction ?
diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
index b90eaa8..fa41b8d 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
@@ -385,6 +385,8 @@ bool IsFiredSuppression(Context *ctx,
 }
 
 void ReportRace(ThreadState *thr) {
+  if (!flags()->report_bugs)
+    return;
   ScopedInRtl in_rtl;
 
   bool freed = false;
-- 
2.7.4