[rtsan] Update notify function name in blocking Pass

Author: davidtrevelyan

llvm/lib/Transforms/Instrumentation/RealtimeSanitizer.cpp

@@ -52,7 +52,7 @@ static PreservedAnalyses rtsanPreservedCFGAnalyses() {
   return PA;
 }
 
-static void insertExpectNotRealtimeAtFunctionEntryPoint(Function &F) {
+static void insertNotifyBlockingCallAtFunctionEntryPoint(Function &F) {
   IRBuilder<> Builder(&F.front().front());
   Value *NameArg = Builder.CreateGlobalString(demangle(F.getName()));
 
@@ -61,7 +61,7 @@ static void insertExpectNotRealtimeAtFunctionEntryPoint(Function &F) {
                         {PointerType::getUnqual(F.getContext())}, false);
 
   FunctionCallee Func = F.getParent()->getOrInsertFunction(
-      "__rtsan_expect_not_realtime", FuncType);
+      "__rtsan_notify_blocking_call", FuncType);
 
   Builder.CreateCall(Func, {NameArg});
 }
@@ -78,7 +78,7 @@ PreservedAnalyses RealtimeSanitizerPass::run(Function &F,
   }
 
   if (F.hasFnAttribute(Attribute::SanitizeRealtimeUnsafe)) {
-    insertExpectNotRealtimeAtFunctionEntryPoint(F);
+    insertNotifyBlockingCallAtFunctionEntryPoint(F);
     return rtsanPreservedCFGAnalyses();
   }
 

llvm/test/Instrumentation/RealtimeSanitizer/rtsan_unsafe.ll

@@ -16,4 +16,4 @@ attributes #0 = { mustprogress noinline sanitize_realtime_unsafe optnone ssp uwt
 ; CHECK: [[GLOBAL_STR:@[a-zA-Z0-9\.]+]]
 ; CHECK-SAME: c"blocking_function()\00"
 ; CHECK-LABEL: @_Z17blocking_functionv()
-; CHECK-NEXT: call{{.*}}@__rtsan_expect_not_realtime(ptr{{.*}}[[GLOBAL_STR]])
+; CHECK-NEXT: call{{.*}}@__rtsan_notify_blocking_call(ptr{{.*}}[[GLOBAL_STR]])