238 
 239 class DebugInfoReadStream : public CompressedReadStream {
 240  private:
 241   const nmethod* _code;
 242   const nmethod* code() const { return _code; }
 243   GrowableArray<ScopeValue*>* _obj_pool;
 244  public:
 245   DebugInfoReadStream(const nmethod* code, int offset, GrowableArray<ScopeValue*>* obj_pool = NULL) :
 246     CompressedReadStream(code->scopes_data_begin(), offset) {
 247     _code = code;
 248     _obj_pool = obj_pool;
 249 
 250   } ;
 251 
 252   oop read_oop() {
 253     return code()->oop_at(read_int());
 254   }
 255   ScopeValue* read_object_value();
 256   ScopeValue* get_cached_object();
 257   // BCI encoding is mostly unsigned, but -1 is a distinguished value
 258   int read_bci() { return read_int() + InvocationEntryBci; }

 259 };
 260 
 261 // DebugInfoWriteStream specializes CompressedWriteStream for
 262 // writing debugging information. Used by ScopeDescRecorder.
 263 
 264 class DebugInfoWriteStream : public CompressedWriteStream {
 265  private:
 266   DebugInformationRecorder* _recorder;
 267   DebugInformationRecorder* recorder() const { return _recorder; }
 268  public:
 269   DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
 270   void write_handle(jobject h);
 271   void write_bci(int bci) { write_int(bci - InvocationEntryBci); }

 272 };

 238 
 239 class DebugInfoReadStream : public CompressedReadStream {
 240  private:
 241   const nmethod* _code;
 242   const nmethod* code() const { return _code; }
 243   GrowableArray<ScopeValue*>* _obj_pool;
 244  public:
 245   DebugInfoReadStream(const nmethod* code, int offset, GrowableArray<ScopeValue*>* obj_pool = NULL) :
 246     CompressedReadStream(code->scopes_data_begin(), offset) {
 247     _code = code;
 248     _obj_pool = obj_pool;
 249 
 250   } ;
 251 
 252   oop read_oop() {
 253     return code()->oop_at(read_int());
 254   }
 255   ScopeValue* read_object_value();
 256   ScopeValue* get_cached_object();
 257   // BCI encoding is mostly unsigned, but -1 is a distinguished value
 258   // Decoding based on encoding: bci = InvocationEntryBci + read_int()/2; reexecute = read_int()%2 == 1 ? true : false;
 259   int read_bci_and_reexecute(bool& reexecute) { int i = read_int(); reexecute = (i & 1) ? true : false; return (i >> 1) + InvocationEntryBci; }
 260 };
 261 
 262 // DebugInfoWriteStream specializes CompressedWriteStream for
 263 // writing debugging information. Used by ScopeDescRecorder.
 264 
 265 class DebugInfoWriteStream : public CompressedWriteStream {
 266  private:
 267   DebugInformationRecorder* _recorder;
 268   DebugInformationRecorder* recorder() const { return _recorder; }
 269  public:
 270   DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
 271   void write_handle(jobject h);
 272   //Encoding bci and reexecute into one word as (bci - InvocationEntryBci)*2 + reexecute
 273   void write_bci_and_reexecute(int bci, bool reexecute) { write_int(((bci - InvocationEntryBci) << 1) + (reexecute ? 1 : 0)); }
 274 };