[wasm] Initial signal handler

src/runtime/runtime-wasm.cc

Index: src/runtime/runtime-wasm.cc
diff --git a/src/runtime/runtime-wasm.cc b/src/runtime/runtime-wasm.cc
index 3ed63879add0dd24a128c273ff0075f92070f276..bad5fc35b4123958eebac28be6c8315a62879f76 100644
--- a/src/runtime/runtime-wasm.cc
+++ b/src/runtime/runtime-wasm.cc
@@ -12,6 +12,7 @@
 #include "src/factory.h"
 #include "src/frames-inl.h"
 #include "src/objects-inl.h"
+#include "src/trap-handler/trap-handler.h"
 #include "src/v8memory.h"
 #include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-objects.h"
@@ -160,6 +161,18 @@ RUNTIME_FUNCTION(Runtime_WasmGetCaughtExceptionValue) {
   return exception;
 }
 
+RUNTIME_FUNCTION(Runtime_SetThreadInWasm) {
+  DCHECK(!trap_handler::IsThreadInWasm());
+  trap_handler::SetThreadInWasm();
+  return isolate->heap()->undefined_value();
+}
+
+RUNTIME_FUNCTION(Runtime_ClearThreadInWasm) {
+  DCHECK(trap_handler::IsThreadInWasm());
+  trap_handler::ClearThreadInWasm();
+  return isolate->heap()->undefined_value();
+}
+
 RUNTIME_FUNCTION(Runtime_WasmRunInterpreter) {
   DCHECK(args.length() == 3);
   HandleScope scope(isolate);