jdk8-mips64-public/hotspot: src/share/vm/code/scopeDesc.cpp@ac27a9c85bea (annotated)

src/share/vm/code/scopeDesc.cpp@ac27a9c85bea (annotated)

src/share/vm/code/scopeDesc.cpp

Thu, 24 May 2018 18:41:44 +0800

author: aoqi
date: Thu, 24 May 2018 18:41:44 +0800
changeset 8856: ac27a9c85bea
parent 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "code/debugInfoRec.hpp"
 #include "code/pcDesc.hpp"
 #include "code/scopeDesc.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop) {
   _code          = code;
   _decode_offset = decode_offset;
   _objects       = decode_object_values(obj_decode_offset);
   _reexecute     = reexecute;
   _return_oop    = return_oop;
   decode_body();
 }
 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop) {
   _code          = code;
   _decode_offset = decode_offset;
   _objects       = decode_object_values(DebugInformationRecorder::serialized_null);
   _reexecute     = reexecute;
   _return_oop    = return_oop;
   decode_body();
 }
 ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
   _code          = parent->_code;
   _decode_offset = parent->_sender_decode_offset;
   _objects       = parent->_objects;
   _reexecute     = false; //reexecute only applies to the first scope
   _return_oop    = false;
   decode_body();
 }
 void ScopeDesc::decode_body() {
   if (decode_offset() == DebugInformationRecorder::serialized_null) {
     // This is a sentinel record, which is only relevant to
     // approximate queries.  Decode a reasonable frame.
     _sender_decode_offset = DebugInformationRecorder::serialized_null;
     _method = _code->method();
     _bci = InvocationEntryBci;
     _locals_decode_offset = DebugInformationRecorder::serialized_null;
     _expressions_decode_offset = DebugInformationRecorder::serialized_null;
     _monitors_decode_offset = DebugInformationRecorder::serialized_null;
   } else {
     // decode header
     DebugInfoReadStream* stream  = stream_at(decode_offset());
     _sender_decode_offset = stream->read_int();
     _method = stream->read_method();
     _bci    = stream->read_bci();
     // decode offsets for body and sender
     _locals_decode_offset      = stream->read_int();
     _expressions_decode_offset = stream->read_int();
     _monitors_decode_offset    = stream->read_int();
   }
 }
 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
   if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
   DebugInfoReadStream* stream = stream_at(decode_offset);
   int length = stream->read_int();
   GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
   for (int index = 0; index < length; index++) {
     result->push(ScopeValue::read_from(stream));
   }
   return result;
 }
 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
   if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
   GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
   DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
   int length = stream->read_int();
   for (int index = 0; index < length; index++) {
     // Objects values are pushed to 'result' array during read so that
     // object's fields could reference it (OBJECT_ID_CODE).
     (void)ScopeValue::read_from(stream);
   }
   assert(result->length() == length, "inconsistent debug information");
   return result;
 }
 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
   if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
   DebugInfoReadStream* stream  = stream_at(decode_offset);
   int length = stream->read_int();
   GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
   for (int index = 0; index < length; index++) {
     result->push(new MonitorValue(stream));
   }
   return result;
 }
 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
   return new DebugInfoReadStream(_code, decode_offset, _objects);
 }
 GrowableArray<ScopeValue*>* ScopeDesc::locals() {
   return decode_scope_values(_locals_decode_offset);
 }
 GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
   return decode_scope_values(_expressions_decode_offset);
 }
 GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
   return decode_monitor_values(_monitors_decode_offset);
 }
 GrowableArray<ScopeValue*>* ScopeDesc::objects() {
   return _objects;
 }
 bool ScopeDesc::is_top() const {
  return _sender_decode_offset == DebugInformationRecorder::serialized_null;
 }
 ScopeDesc* ScopeDesc::sender() const {
   if (is_top()) return NULL;
   return new ScopeDesc(this);
 }
 #ifndef PRODUCT
 void ScopeDesc::print_value_on(outputStream* st) const {
   tty->print("   ");
   method()->print_short_name(st);
   int lineno = method()->line_number_from_bci(bci());
   if (lineno != -1) {
     st->print_cr("@%d (line %d)", bci(), lineno);
   } else {
     st->print_cr("@%d", bci());
   }
 }
 void ScopeDesc::print_on(outputStream* st) const {
   print_on(st, NULL);
 }
 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
   // header
   if (pd != NULL) {
     tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
   }
   print_value_on(st);
   // decode offsets
   if (WizardMode) {
     st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->content_begin());
     st->print_cr(" offset:     %d",    _decode_offset);
     st->print_cr(" bci:        %d",    bci());
     st->print_cr(" reexecute:  %s",    should_reexecute() ? "true" : "false");
     st->print_cr(" locals:     %d",    _locals_decode_offset);
     st->print_cr(" stack:      %d",    _expressions_decode_offset);
     st->print_cr(" monitor:    %d",    _monitors_decode_offset);
     st->print_cr(" sender:     %d",    _sender_decode_offset);
   }
   // locals
   { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
     if (l != NULL) {
       tty->print_cr("   Locals");
       for (int index = 0; index < l->length(); index++) {
         st->print("    - l%d: ", index);
         l->at(index)->print_on(st);
         st->cr();
       }
     }
   }
   // expressions
   { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
     if (l != NULL) {
       st->print_cr("   Expression stack");
       for (int index = 0; index < l->length(); index++) {
         st->print("   - @%d: ", index);
         l->at(index)->print_on(st);
         st->cr();
       }
     }
   }
   // monitors
   { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
     if (l != NULL) {
       st->print_cr("   Monitor stack");
       for (int index = 0; index < l->length(); index++) {
         st->print("    - @%d: ", index);
         l->at(index)->print_on(st);
         st->cr();
       }
     }
   }
 #ifdef COMPILER2
   if (DoEscapeAnalysis && is_top() && _objects != NULL) {
     tty->print_cr("Objects");
     for (int i = 0; i < _objects->length(); i++) {
       ObjectValue* sv = (ObjectValue*) _objects->at(i);
       tty->print(" - %d: ", sv->id());
       sv->print_fields_on(tty);
       tty->cr();
     }
   }
 #endif // COMPILER2
 }
 #endif
 void ScopeDesc::verify() {
   ResourceMark rm;
   guarantee(method()->is_method(), "type check");
   // check if we have any illegal elements on the expression stack
   { GrowableArray<ScopeValue*>* l = expressions();
     if (l != NULL) {
       for (int index = 0; index < l->length(); index++) {
        //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
       }
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/code/scopeDesc.cpp@ac27a9c85bea (annotated)

src/share/vm/code/scopeDesc.cpp