Debugger: prepare code for debugging on a per-function basis.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index d0c415e6cd7df6c5a50a7e13aa8c403a119b7db0..fb02d8dbaea7271a88f623f2f8f59c3b9adc22a1 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -9328,11 +9328,32 @@ void JSFunction::JSFunctionIterateBody(int object_size, ObjectVisitor* v) {
 }
 
 
+bool JSFunction::Inlines(SharedFunctionInfo* candidate) {
+  DisallowHeapAllocation no_gc;
+  if (shared() == candidate) return true;
+  if (code()->kind() != Code::OPTIMIZED_FUNCTION) return false;
+  DeoptimizationInputData* const data =
+      DeoptimizationInputData::cast(code()->deoptimization_data());
+  if (data->length() == 0) return false;
+  FixedArray* const literals = data->LiteralArray();
+  int const inlined_count = data->InlinedFunctionCount()->value();
+  for (int i = 0; i < inlined_count; ++i) {
+    if (SharedFunctionInfo::cast(literals->get(i)) == candidate) {
+      return true;
+    }
+  }
+  return false;
+}
+
+
 void JSFunction::MarkForOptimization() {
   Isolate* isolate = GetIsolate();
+  // Do not optimize if function contains break points.
+  if (shared()->HasDebugInfo()) return;
   DCHECK(!IsOptimized());
   DCHECK(shared()->allows_lazy_compilation() ||
          !shared()->optimization_disabled());
+  DCHECK(!shared()->HasDebugInfo());
   set_code_no_write_barrier(
       isolate->builtins()->builtin(Builtins::kCompileOptimized));
   // No write barrier required, since the builtin is part of the root set.