Adding src_file_name:line_number into perf log entries for compiled JS functi...

src/objects.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6757 matching lines @@
   ASSERT(obj->IsJSObject());
 
   descriptors->SetNextEnumerationIndex(NextEnumerationIndex());
   // Check that it really works.
   ASSERT(obj->HasFastProperties());
 
   return obj;
 }
 
 
+// Init line_ends array with code positions of line ends inside script source
+void Script::InitLineEnds() {
+  if (!line_ends()->IsUndefined()) return;
+
+  Handle<String> src(String::cast(source()));
+  const int src_len = src->length();
+  Handle<JSArray> array = Factory::NewJSArray(0);
+  int array_index = 0;
+  Handle<String> new_line = Factory::NewStringFromAscii(CStrVector("\n"));
+  int position = 0;
+  while (position < src_len) {
+    position = Runtime::StringMatch(src, new_line, position);
+    if (position != -1) {
+      SetElement(array, array_index++, Handle<Smi>(Smi::FromInt(position++)));
+    } else {
+      break;
+    }
+  }
+
+  // If the script does not end with a line ending add the final end position
+  // as just past the last line ending.
+  if (array_index == 0 ||
+      (Smi::cast(array->GetElement(array_index - 1))->value() != src_len - 1)) {
+    SetElement(array, array_index++, Handle<Smi>(Smi::FromInt(src_len)));
+  }
+
+  Handle<FixedArray> fixed_array = Factory::NewFixedArray(0);
+  set_line_ends(fixed_array->AddKeysFromJSArray(*array));
+  ASSERT(line_ends()->IsFixedArray());
+}
+
+
+// Convert code position into line number
+int Script::GetLineNumber(int code_pos) {
+  InitLineEnds();
+  FixedArray* line_ends_array = FixedArray::cast(line_ends());
+
+  int line = -1;
+  if (code_pos <= (Smi::cast(line_ends_array->get(0)))->value()) {
+    line = 0;
+  } else {
+    const int line_ends_length = line_ends_array->length();
+    for (int i = 1; i < line_ends_length; ++i) {
+      if ((Smi::cast(line_ends_array->get(i - 1)))->value() < code_pos &&
+          code_pos <= (Smi::cast(line_ends_array->get(i)))->value()) {
+        line = i;
+        break;
+      }
+    }
+  }
+
+  return line != -1 ? line + line_offset()->value() : line;
+}
+
+
 // Check if there is a break point at this code position.
 bool DebugInfo::HasBreakPoint(int code_position) {
   // Get the break point info object for this code position.
   Object* break_point_info = GetBreakPointInfo(code_position);
 
   // If there is no break point info object or no break points in the break
   // point info object there is no break point at this code position.
   if (break_point_info->IsUndefined()) return false;
   return BreakPointInfo::cast(break_point_info)->GetBreakPointCount() > 0;
 }
@@ skipping 226 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 
 
 } }  // namespace v8::internal