[debugger] infrastructure for side-effect-free debug-evaluate.

src/api-arguments.cc

Index: src/api-arguments.cc
diff --git a/src/api-arguments.cc b/src/api-arguments.cc
index 3baf9ea36502ca7d24ff0b99577b2de7fb20735e..c7c54e5de1c37fc635644642cfeb1820e27f6f62 100644
--- a/src/api-arguments.cc
+++ b/src/api-arguments.cc
@@ -4,6 +4,7 @@
 
 #include "src/api-arguments.h"
 
+#include "src/debug/debug.h"
 #include "src/objects-inl.h"
 #include "src/tracing/trace-event.h"
 #include "src/vm-state-inl.h"
@@ -13,6 +14,10 @@ namespace internal {
 
 Handle<Object> FunctionCallbackArguments::Call(FunctionCallback f) {
   Isolate* isolate = this->isolate();
+  if (isolate->needs_side_effect_check() &&
+      !isolate->debug()->PerformSideEffectCheckForCallback(FUNCTION_ADDR(f))) {
+    return Handle<Object>();
+  }
   RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::FunctionCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
@@ -24,6 +29,10 @@ Handle<Object> FunctionCallbackArguments::Call(FunctionCallback f) {
 Handle<JSObject> PropertyCallbackArguments::Call(
     IndexedPropertyEnumeratorCallback f) {
   Isolate* isolate = this->isolate();
+  if (isolate->needs_side_effect_check() &&
+      !isolate->debug()->PerformSideEffectCheckForCallback(FUNCTION_ADDR(f))) {
+    return Handle<JSObject>();
+  }
   RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::PropertyCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
@@ -32,5 +41,10 @@ Handle<JSObject> PropertyCallbackArguments::Call(
   return GetReturnValue<JSObject>(isolate);
 }
 
+bool PropertyCallbackArguments::PerformSideEffectCheck(Isolate* isolate,
+                                                       Address function) {
+  return isolate->debug()->PerformSideEffectCheckForCallback(function);
+}
+
 }  // namespace internal
 }  // namespace v8