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   int read_bci_and_restart(bool& restart) { int i = read_int(); restart = (i & 1) ? true : false; return (i >> 1) + 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_and_restart(int bci, bool restart) { write_int(((bci - InvocationEntryBci) << 1) + (restart ? 1 : 0)); }
 272 };