1.1 --- a/jitcraft/BytecodeEmitter.cpp	Wed Jul 11 01:12:54 2012 -0700
     1.2 +++ b/jitcraft/BytecodeEmitter.cpp	Thu Jul 12 00:38:00 2012 -0700
     1.3 @@ -32,6 +32,8 @@
     1.4      oom_(false),
     1.5      maxStackDepth_(0)
     1.6  {
     1.7 +    lastCodePosition_ = 0;
     1.8 +    firstLine_ = 1;
     1.9  }
    1.10  
    1.11  bool
    1.12 @@ -95,3 +97,18 @@
    1.13      oom_ &= oopRecords_.append(record);
    1.14  }
    1.15  
    1.16 +void
    1.17 +BytecodeEmitter::note_position(const SourcePosition &pos)
    1.18 +{
    1.19 +    assert(pos.line > 0);
    1.20 +    assert(unsigned(pos.line) >= firstLine_);
    1.21 +
    1.22 +    unsigned lineDelta = unsigned(pos.line) - firstLine_;
    1.23 +    unsigned pcDelta = unsigned(position()) - lastCodePosition_;
    1.24 +
    1.25 +    sourcemap_.writeUint32(pcDelta);
    1.26 +    sourcemap_.writeUint32(lineDelta);
    1.27 +    sourcemap_.writeUint32(pos.col);
    1.28 +
    1.29 +    lastCodePosition_ = unsigned(position());
    1.30 +}