tsan: change tsan/Go interface for obtaining the current Processor

Current interface assumes that Go calls ProcWire/ProcUnwire
to establish the association between thread and proc.
With the wisdom of hindsight, this interface does not work
very well. I had to sprinkle Go scheduler with wire/unwire
calls, and any mistake leads to hard to debug crashes.
This is not something one wants to maintian.
Fortunately, there is a simpler solution. We can ask Go
runtime as to what is the current Processor, and that
question is very easy to answer on Go side.
Switch to such interface.

llvm-svn: 267703

1 files changed, 6 insertions, 1 deletions

diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl.h b/compiler-rt/lib/tsan/rtl/tsan_rtl.h
index ad3e24ea223..aa8181586cc 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl.h
@@ -406,7 +406,12 @@ struct ThreadState {
   DDLogicalThread *dd_lt;
 
   // Current wired Processor, or nullptr. Required to handle any events.
-  Processor *proc;
+  Processor *proc1;
+#ifndef SANITIZER_GO
+  Processor *proc() { return proc1; }
+#else
+  Processor *proc();
+#endif
 
   atomic_uintptr_t in_signal_handler;
   ThreadSignalContext *signal_ctx;