[generators] Implement %GeneratorGetSourcePosition.

src/runtime/runtime-generator.cc

Index: src/runtime/runtime-generator.cc
diff --git a/src/runtime/runtime-generator.cc b/src/runtime/runtime-generator.cc
index 493e5b5a9c7935f2644ab09b730998d4fffe76a7..3b65682bbc31383d1058c8c67b1d1e2893ba2929 100644
--- a/src/runtime/runtime-generator.cc
+++ b/src/runtime/runtime-generator.cc
@@ -40,7 +40,6 @@ RUNTIME_FUNCTION(Runtime_CreateJSGeneratorObject) {
   return *generator;
 }
 
-
 RUNTIME_FUNCTION(Runtime_SuspendJSGeneratorObject) {
   HandleScope handle_scope(isolate);
   DCHECK(args.length() == 1);
@@ -91,8 +90,6 @@ RUNTIME_FUNCTION(Runtime_GeneratorClose) {
   return isolate->heap()->undefined_value();
 }
 
-
-// Returns function of generator activation.
 RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
@@ -101,8 +98,6 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) {
   return generator->function();
 }
 
-
-// Returns receiver of generator activation.
 RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
@@ -111,17 +106,14 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
   return generator->receiver();
 }
 
-
-// Returns input of generator activation.
-RUNTIME_FUNCTION(Runtime_GeneratorGetInput) {
+RUNTIME_FUNCTION(Runtime_GeneratorGetInputOrDebugPos) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
-  return generator->input();
+  return generator->input_or_debug_pos();
 }
 
-// Returns resume mode of generator activation.
 RUNTIME_FUNCTION(Runtime_GeneratorGetResumeMode) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
@@ -130,7 +122,6 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetResumeMode) {
   return Smi::FromInt(generator->resume_mode());
 }
 
-
 RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
@@ -139,20 +130,13 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) {
   return Smi::FromInt(generator->continuation());
 }
 
-
 RUNTIME_FUNCTION(Runtime_GeneratorGetSourcePosition) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   if (!generator->is_suspended()) return isolate->heap()->undefined_value();
-
-  if (generator->function()->shared()->HasBytecodeArray()) UNIMPLEMENTED();
-
-  Handle<Code> code(generator->function()->code(), isolate);
-  int offset = generator->continuation();
-  CHECK(0 <= offset && offset < code->instruction_size());
-  return Smi::FromInt(code->SourcePosition(offset));
+  return Smi::FromInt(generator->source_position());
 }
 
 }  // namespace internal