Do not record source positions for non-JS or native script code.

src/source-position-table.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SOURCE_POSITION_TABLE_H_
 #define V8_SOURCE_POSITION_TABLE_H_
 
 #include "src/assert-scope.h"
 #include "src/checks.h"
 #include "src/handles.h"
@@ skipping 14 matching lines @@
   PositionTableEntry(int offset, int source, bool statement)
       : code_offset(offset), source_position(source), is_statement(statement) {}
 
   int code_offset;
   int source_position;
   bool is_statement;
 };
 
 class SourcePositionTableBuilder {
  public:
-  SourcePositionTableBuilder(Isolate* isolate, Zone* zone);
+  enum RecordingMode { OMIT_SOURCE_POSITIONS, RECORD_SOURCE_POSITIONS };
+
+  SourcePositionTableBuilder(Isolate* isolate, Zone* zone,
+                             RecordingMode mode = RECORD_SOURCE_POSITIONS);
 
   void EndJitLogging(AbstractCode* code);
 
   void AddPosition(size_t code_offset, int source_position, bool is_statement);
   Handle<ByteArray> ToSourcePositionTable();
 
  private:
   void AddEntry(const PositionTableEntry& entry);
 
+  inline bool Omit() const { return mode_ == OMIT_SOURCE_POSITIONS; }
+
   Isolate* isolate_;
+  RecordingMode mode_;
   ZoneVector<byte> bytes_;
 #ifdef ENABLE_SLOW_DCHECKS
   ZoneVector<PositionTableEntry> raw_entries_;
 #endif
   PositionTableEntry previous_;  // Previously written entry, to compute delta.
   // Currently jit_handler_data_ is used to store JITHandler-specific data
   // over the lifetime of a SourcePositionTableBuilder.
   void* jit_handler_data_;
 };
 
@@ skipping 23 matching lines @@
   ByteArray* table_;
   int index_;
   PositionTableEntry current_;
   DisallowHeapAllocation no_gc;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SOURCE_POSITION_TABLE_H_