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

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 3ea5b19c0743a3b700350233b7e4712b33ccd711..a5c73d5b489c4b5b52b06f8fb7329bc87a2a819a 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -28,6 +28,7 @@
 #include "src/counters-inl.h"
 #include "src/counters.h"
 #include "src/date.h"
+#include "src/debug/debug-evaluate.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/elements.h"
@@ -13940,6 +13941,21 @@ String* SharedFunctionInfo::DebugName() {
   return String::cast(n);
 }
 
+bool SharedFunctionInfo::HasNoSideEffect() {
+  if (!computed_has_no_side_effect()) {
+    Isolate* isolate = GetIsolate();
+    if (HasBytecodeArray()) {
+      DisallowHeapAllocation not_handlified;
+      Handle<BytecodeArray> array(bytecode_array(), isolate);
+      set_has_no_side_effect(DebugEvaluate::HasNoSideEffect(array));
+    } else {
+      set_has_no_side_effect(false);
+    }
+    set_computed_has_no_side_effect(true);
+  }
+  return has_no_side_effect();
+}
+
 // The filter is a pattern that matches function names in this way:
 //   "*"      all; the default
 //   "-"      all but the top-level function