1622   int decode_offset = 0;
1623   nmethod* nm = NULL;
1624   bool skip_fillInStackTrace_check = false;
1625   bool skip_throwableInit_check = false;
1626   bool skip_hidden = !ShowHiddenFrames;
1627 
1628   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1629     Method* method = NULL;
1630     int bci = 0;
1631 
1632     // Compiled java method case.
1633     if (decode_offset != 0) {
1634       DebugInfoReadStream stream(nm, decode_offset);
1635       decode_offset = stream.read_int();
1636       method = (Method*)nm->metadata_at(stream.read_int());
1637       bci = stream.read_bci();
1638     } else {
1639       if (fr.is_first_frame()) break;
1640       address pc = fr.pc();
1641       if (fr.is_interpreted_frame()) {
1642         intptr_t bcx = fr.interpreter_frame_bcx();
1643         method = fr.interpreter_frame_method();
1644         bci =  fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1645         fr = fr.sender(&map);
1646       } else {
1647         CodeBlob* cb = fr.cb();
1648         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1649         // but non nmethod
1650         fr = fr.sender(&map);
1651         if (cb == NULL || !cb->is_nmethod()) {
1652           continue;
1653         }
1654         nm = (nmethod*)cb;
1655         if (nm->method()->is_native()) {
1656           method = nm->method();
1657           bci = 0;
1658         } else {
1659           PcDesc* pd = nm->pc_desc_at(pc);
1660           decode_offset = pd->scope_decode_offset();
1661           // if decode_offset is not equal to 0, it will execute the
1662           // "compiled java method case" at the beginning of the loop.
1663           continue;
1664         }

1622   int decode_offset = 0;
1623   nmethod* nm = NULL;
1624   bool skip_fillInStackTrace_check = false;
1625   bool skip_throwableInit_check = false;
1626   bool skip_hidden = !ShowHiddenFrames;
1627 
1628   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1629     Method* method = NULL;
1630     int bci = 0;
1631 
1632     // Compiled java method case.
1633     if (decode_offset != 0) {
1634       DebugInfoReadStream stream(nm, decode_offset);
1635       decode_offset = stream.read_int();
1636       method = (Method*)nm->metadata_at(stream.read_int());
1637       bci = stream.read_bci();
1638     } else {
1639       if (fr.is_first_frame()) break;
1640       address pc = fr.pc();
1641       if (fr.is_interpreted_frame()) {
1642         address bcp = fr.interpreter_frame_bcp();
1643         method = fr.interpreter_frame_method();
1644         bci =  method->bci_from(bcp);
1645         fr = fr.sender(&map);
1646       } else {
1647         CodeBlob* cb = fr.cb();
1648         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1649         // but non nmethod
1650         fr = fr.sender(&map);
1651         if (cb == NULL || !cb->is_nmethod()) {
1652           continue;
1653         }
1654         nm = (nmethod*)cb;
1655         if (nm->method()->is_native()) {
1656           method = nm->method();
1657           bci = 0;
1658         } else {
1659           PcDesc* pd = nm->pc_desc_at(pc);
1660           decode_offset = pd->scope_decode_offset();
1661           // if decode_offset is not equal to 0, it will execute the
1662           // "compiled java method case" at the beginning of the loop.
1663           continue;
1664         }