379 }
380
381 StackValueCollection* interpretedVFrame::expressions() const {
382 return stack_data(true);
383 }
384
385 /*
386 * Worker routine for fetching references and/or values
387 * for a particular bci in the interpretedVFrame.
388 *
389 * Returns data for either "locals" or "expressions",
390 * using bci relative oop_map (oop_mask) information.
391 *
392 * @param expressions bool switch controlling what data to return
393 (false == locals / true == expression)
394 *
395 */
396 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
397
398 InterpreterOopMap oop_mask;
399 // oopmap for current bci
400 if ((TraceDeoptimization && Verbose) JVMCI_ONLY( || PrintDeoptimizationDetails)) {
401 methodHandle m_h(Thread::current(), method());
402 OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask);
403 } else {
404 method()->mask_for(bci(), &oop_mask);
405 }
406
407 const int mask_len = oop_mask.number_of_entries();
408
409 // If the method is native, method()->max_locals() is not telling the truth.
410 // For our purposes, max locals instead equals the size of parameters.
411 const int max_locals = method()->is_native() ?
412 method()->size_of_parameters() : method()->max_locals();
413
414 assert(mask_len >= max_locals, "invariant");
415
416 const int length = expressions ? mask_len - max_locals : max_locals;
417 assert(length >= 0, "invariant");
418
419 StackValueCollection* const result = new StackValueCollection(length);
420
421 if (0 == length) {
422 return result;
423 }
424
425 if (expressions) {
426 stack_expressions(result, length, max_locals, oop_mask, fr());
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379 }
380
381 StackValueCollection* interpretedVFrame::expressions() const {
382 return stack_data(true);
383 }
384
385 /*
386 * Worker routine for fetching references and/or values
387 * for a particular bci in the interpretedVFrame.
388 *
389 * Returns data for either "locals" or "expressions",
390 * using bci relative oop_map (oop_mask) information.
391 *
392 * @param expressions bool switch controlling what data to return
393 (false == locals / true == expression)
394 *
395 */
396 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
397
398 InterpreterOopMap oop_mask;
399 method()->mask_for(bci(), &oop_mask);
400 const int mask_len = oop_mask.number_of_entries();
401
402 // If the method is native, method()->max_locals() is not telling the truth.
403 // For our purposes, max locals instead equals the size of parameters.
404 const int max_locals = method()->is_native() ?
405 method()->size_of_parameters() : method()->max_locals();
406
407 assert(mask_len >= max_locals, "invariant");
408
409 const int length = expressions ? mask_len - max_locals : max_locals;
410 assert(length >= 0, "invariant");
411
412 StackValueCollection* const result = new StackValueCollection(length);
413
414 if (0 == length) {
415 return result;
416 }
417
418 if (expressions) {
419 stack_expressions(result, length, max_locals, oop_mask, fr());
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