jdk

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/*
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 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "classfile/javaThreadStatus.hpp"
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#include "classfile/vmClasses.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "code/codeCache.hpp"
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#include "code/debugInfoRec.hpp"
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#include "code/nmethod.hpp"
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#include "code/pcDesc.hpp"
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#include "code/scopeDesc.hpp"
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#include "interpreter/interpreter.hpp"
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#include "interpreter/oopMapCache.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/method.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/stackChunkOop.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/frame.inline.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/javaThread.inline.hpp"
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#include "runtime/objectMonitor.hpp"
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#include "runtime/objectMonitor.inline.hpp"
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#include "runtime/osThread.hpp"
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#include "runtime/signature.hpp"
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#include "runtime/stackFrameStream.inline.hpp"
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#include "runtime/stubRoutines.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/vframe.inline.hpp"
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#include "runtime/vframeArray.hpp"
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#include "runtime/vframe_hp.hpp"
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vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
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: _reg_map(reg_map), _thread(thread),
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  _chunk(Thread::current(), reg_map->stack_chunk()()) {
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  assert(fr != nullptr, "must have frame");
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  _fr = *fr;
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}
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vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
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  // Interpreter frame
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  if (f->is_interpreted_frame()) {
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    return new interpretedVFrame(f, reg_map, thread);
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  }
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  // Compiled frame
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  CodeBlob* cb = f->cb();
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  if (cb != nullptr) {
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    if (cb->is_nmethod()) {
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      nmethod* nm = cb->as_nmethod();
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      return new compiledVFrame(f, reg_map, thread, nm);
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    }
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    if (f->is_runtime_frame()) {
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      // Skip this frame and try again.
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      RegisterMap temp_map = *reg_map;
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      frame s = f->sender(&temp_map);
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      return new_vframe(&s, &temp_map, thread);
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    }
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  }
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  // Entry frame
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  if (f->is_entry_frame()) {
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    return new entryVFrame(f, reg_map, thread);
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  }
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  // External frame
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  return new externalVFrame(f, reg_map, thread);
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}
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vframe* vframe::sender() const {
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  RegisterMap temp_map = *register_map();
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  assert(is_top(), "just checking");
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  if (_fr.is_empty()) return nullptr;
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  if (_fr.is_entry_frame() && _fr.is_first_frame()) return nullptr;
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  frame s = _fr.real_sender(&temp_map);
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  if (s.is_first_frame()) return nullptr;
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  return vframe::new_vframe(&s, &temp_map, thread());
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}
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bool vframe::is_vthread_entry() const {
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  return _fr.is_first_vthread_frame(register_map()->thread());
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}
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javaVFrame* vframe::java_sender() const {
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  vframe* f = sender();
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  while (f != nullptr) {
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    if (f->is_vthread_entry()) break;
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    if (f->is_java_frame() && !javaVFrame::cast(f)->method()->is_continuation_enter_intrinsic())
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      return javaVFrame::cast(f);
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    f = f->sender();
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  }
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  return nullptr;
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}
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// ------------- javaVFrame --------------
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GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
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  assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
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         "must be at safepoint or it's a java frame of the current thread");
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  GrowableArray<MonitorInfo*>* mons = monitors();
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  GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
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  if (mons->is_empty()) return result;
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  bool found_first_monitor = false;
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  // The ObjectMonitor* can't be async deflated since we are either
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  // at a safepoint or the calling thread is operating on itself so
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  // it cannot exit the ObjectMonitor so it remains busy.
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  ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
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  ObjectMonitor *pending_monitor = nullptr;
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  if (waiting_monitor == nullptr) {
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    pending_monitor = thread()->current_pending_monitor();
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  }
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  oop pending_obj = (pending_monitor != nullptr ? pending_monitor->object() : (oop) nullptr);
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  oop waiting_obj = (waiting_monitor != nullptr ? waiting_monitor->object() : (oop) nullptr);
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  for (int index = (mons->length()-1); index >= 0; index--) {
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    MonitorInfo* monitor = mons->at(index);
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    if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
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    oop obj = monitor->owner();
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    if (obj == nullptr) continue; // skip unowned monitor
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    //
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    // Skip the monitor that the thread is blocked to enter or waiting on
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    //
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    if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
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      continue;
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    }
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    found_first_monitor = true;
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    result->append(monitor);
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  }
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  return result;
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}
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void javaVFrame::print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
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  if (obj.not_null()) {
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    st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, p2i(obj()));
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    if (obj->klass() == vmClasses::Class_klass()) {
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      st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
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    } else {
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      Klass* k = obj->klass();
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      st->print_cr("(a %s)", k->external_name());
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    }
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  }
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}
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void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
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  Thread* current = Thread::current();
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  ResourceMark rm(current);
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  HandleMark hm(current);
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  // If this is the first frame and it is java.lang.Object.wait(...)
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  // then print out the receiver. Locals are not always available,
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  // e.g., compiled native frames have no scope so there are no locals.
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  if (frame_count == 0) {
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    if (method()->name() == vmSymbols::wait_name() &&
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        method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
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      const char *wait_state = "waiting on"; // assume we are waiting
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      // If earlier in the output we reported java.lang.Thread.State ==
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      // "WAITING (on object monitor)" and now we report "waiting on", then
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      // we are still waiting for notification or timeout. Otherwise if
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      // we earlier reported java.lang.Thread.State == "BLOCKED (on object
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      // monitor)", then we are actually waiting to re-lock the monitor.
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      StackValueCollection* locs = locals();
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      if (!locs->is_empty()) {
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        StackValue* sv = locs->at(0);
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        if (sv->type() == T_OBJECT) {
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          Handle o = locs->at(0)->get_obj();
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          if (java_lang_Thread::get_thread_status(thread()->threadObj()) ==
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                                JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) {
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            wait_state = "waiting to re-lock in wait()";
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          }
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          print_locked_object_class_name(st, o, wait_state);
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        }
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      } else {
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        st->print_cr("\t- %s <no object reference available>", wait_state);
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      }
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    } else if (thread()->current_park_blocker() != nullptr) {
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      oop obj = thread()->current_park_blocker();
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      Klass* k = obj->klass();
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      st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
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    }
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    else if (thread()->osthread()->get_state() == OBJECT_WAIT) {
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      // We are waiting on an Object monitor but Object.wait() isn't the
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      // top-frame, so we should be waiting on a Class initialization monitor.
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      InstanceKlass* k = thread()->class_to_be_initialized();
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      if (k != nullptr) {
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        st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
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      }
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    }
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  }
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  // Print out all monitors that we have locked, or are trying to lock,
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  // including re-locking after being notified or timing out in a wait().
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  GrowableArray<MonitorInfo*>* mons = monitors();
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  if (!mons->is_empty()) {
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    bool found_first_monitor = false;
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    for (int index = (mons->length()-1); index >= 0; index--) {
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      MonitorInfo* monitor = mons->at(index);
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      if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
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        if (monitor->owner_is_scalar_replaced()) {
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          Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
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          st->print_cr("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
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        } else {
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          Handle obj(current, monitor->owner());
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          if (obj() != nullptr) {
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            print_locked_object_class_name(st, obj, "eliminated");
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          }
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        }
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        continue;
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      }
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      if (monitor->owner() != nullptr) {
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        // the monitor is associated with an object, i.e., it is locked
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        const char *lock_state = "locked"; // assume we have the monitor locked
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        if (!found_first_monitor && frame_count == 0) {
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          // If this is the first frame and we haven't found an owned
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          // monitor before, then we need to see if we have completed
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          // the lock or if we are blocked trying to acquire it. Only
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          // an inflated monitor that is first on the monitor list in
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          // the first frame can block us on a monitor enter.
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          markWord mark = monitor->owner()->mark();
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          // The first stage of async deflation does not affect any field
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          // used by this comparison so the ObjectMonitor* is usable here.
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          if (mark.has_monitor() &&
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              ( // we have marked ourself as pending on this monitor
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                mark.monitor() == thread()->current_pending_monitor() ||
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                // we are not the owner of this monitor
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                !mark.monitor()->is_entered(thread())
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              )) {
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            lock_state = "waiting to lock";
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          }
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        }
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        print_locked_object_class_name(st, Handle(current, monitor->owner()), lock_state);
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        found_first_monitor = true;
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      }
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    }
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  }
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}
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// ------------- interpretedVFrame --------------
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u_char* interpretedVFrame::bcp() const {
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  return stack_chunk() == nullptr ? fr().interpreter_frame_bcp() : stack_chunk()->interpreter_frame_bcp(fr());
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}
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intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
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  assert(stack_chunk() == nullptr, "Not supported for heap frames"); // unsupported for now because seems to be unused
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  assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
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  return fr().interpreter_frame_local_at(offset);
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}
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GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
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  GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
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  if (stack_chunk() == nullptr) { // no monitors in continuations
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    for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
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        current >= fr().interpreter_frame_monitor_end();
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        current = fr().previous_monitor_in_interpreter_frame(current)) {
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      result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
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    }
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  }
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  return result;
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}
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int interpretedVFrame::bci() const {
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  return method()->bci_from(bcp());
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}
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Method* interpretedVFrame::method() const {
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  return stack_chunk() == nullptr ? fr().interpreter_frame_method() : stack_chunk()->interpreter_frame_method(fr());
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}
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static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
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                                                   int index,
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                                                   const intptr_t* const addr,
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                                                   stackChunkOop chunk) {
303

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  assert(index >= 0 && index < oop_mask.number_of_entries(), "invariant");
305

306
  // categorize using oop_mask
307
  if (oop_mask.is_oop(index)) {
308
    return StackValue::create_stack_value_from_oop_location(chunk, (void*)addr);
309
  }
310
  // value (integer) "v"
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  return new StackValue(addr != nullptr ? *addr : 0);
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}
313

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static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
315
  assert(addr != nullptr, "invariant");
316

317
  // Ensure to be 'inside' the expression stack (i.e., addr >= sp for Intel).
318
  // In case of exceptions, the expression stack is invalid and the sp
319
  // will be reset to express this condition.
320
  if (frame::interpreter_frame_expression_stack_direction() > 0) {
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    return addr <= fr.interpreter_frame_tos_address();
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  }
323

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  return addr >= fr.interpreter_frame_tos_address();
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}
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static void stack_locals(StackValueCollection* result,
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                         int length,
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                         const InterpreterOopMap& oop_mask,
330
                         const frame& fr,
331
                         const stackChunkOop chunk) {
332

333
  assert(result != nullptr, "invariant");
334

335
  for (int i = 0; i < length; ++i) {
336
    const intptr_t* addr;
337
    if (chunk == nullptr) {
338
      addr = fr.interpreter_frame_local_at(i);
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      assert(addr >= fr.sp(), "must be inside the frame");
340
    } else {
341
      addr = chunk->interpreter_frame_local_at(fr, i);
342
    }
343
    assert(addr != nullptr, "invariant");
344

345
    StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr, chunk);
346
    assert(sv != nullptr, "sanity check");
347

348
    result->add(sv);
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  }
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}
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static void stack_expressions(StackValueCollection* result,
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                              int length,
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                              int max_locals,
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                              const InterpreterOopMap& oop_mask,
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                              const frame& fr,
357
                              const stackChunkOop chunk) {
358

359
  assert(result != nullptr, "invariant");
360

361
  for (int i = 0; i < length; ++i) {
362
    const intptr_t* addr;
363
    if (chunk == nullptr) {
364
      addr = fr.interpreter_frame_expression_stack_at(i);
365
      assert(addr != nullptr, "invariant");
366
      if (!is_in_expression_stack(fr, addr)) {
367
        // Need to ensure no bogus escapes.
368
        addr = nullptr;
369
      }
370
    } else {
371
      addr = chunk->interpreter_frame_expression_stack_at(fr, i);
372
    }
373

374
    StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
375
                                                           i + max_locals,
376
                                                           addr,
377
                                                           chunk);
378
    assert(sv != nullptr, "sanity check");
379

380
    result->add(sv);
381
  }
382
}
383

384
StackValueCollection* interpretedVFrame::locals() const {
385
  return stack_data(false);
386
}
387

388
StackValueCollection* interpretedVFrame::expressions() const {
389
  return stack_data(true);
390
}
391

392
/*
393
 * Worker routine for fetching references and/or values
394
 * for a particular bci in the interpretedVFrame.
395
 *
396
 * Returns data for either "locals" or "expressions",
397
 * using bci relative oop_map (oop_mask) information.
398
 *
399
 * @param expressions  bool switch controlling what data to return
400
                       (false == locals / true == expression)
401
 *
402
 */
403
StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
404

405
  InterpreterOopMap oop_mask;
406
  method()->mask_for(bci(), &oop_mask);
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(), stack_chunk());
427
  } else {
428
    stack_locals(result, length, oop_mask, fr(), stack_chunk());
429
  }
430

431
  assert(length == result->size(), "invariant");
432

433
  return result;
434
}
435

436
void interpretedVFrame::set_locals(StackValueCollection* values) const {
437
  if (values == nullptr || values->size() == 0) return;
438

439
  // If the method is native, max_locals is not telling the truth.
440
  // maxlocals then equals the size of parameters
441
  const int max_locals = method()->is_native() ?
442
    method()->size_of_parameters() : method()->max_locals();
443

444
  assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
445

446
  // handle locals
447
  for (int i = 0; i < max_locals; i++) {
448
    // Find stack location
449
    intptr_t *addr = locals_addr_at(i);
450

451
    // Depending on oop/int put it in the right package
452
    const StackValue* const sv = values->at(i);
453
    assert(sv != nullptr, "sanity check");
454
    if (sv->type() == T_OBJECT) {
455
      *(oop *) addr = (sv->get_obj())();
456
    } else {                   // integer
457
      *addr = sv->get_intptr();
458
    }
459
  }
460
}
461

462
// ------------- cChunk --------------
463

464
entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
465
: externalVFrame(fr, reg_map, thread) {}
466

467
MonitorInfo::MonitorInfo(oop owner, BasicLock* lock, bool eliminated, bool owner_is_scalar_replaced) {
468
  Thread* thread = Thread::current();
469
  if (!owner_is_scalar_replaced) {
470
    _owner = Handle(thread, owner);
471
    _owner_klass = Handle();
472
  } else {
473
    assert(eliminated, "monitor should be eliminated for scalar replaced object");
474
    _owner = Handle();
475
    _owner_klass = Handle(thread, owner);
476
  }
477
  _lock = lock;
478
  _eliminated = eliminated;
479
  _owner_is_scalar_replaced = owner_is_scalar_replaced;
480
}
481

482
#ifdef ASSERT
483
void vframeStreamCommon::found_bad_method_frame() const {
484
  // 6379830 Cut point for an assertion that occasionally fires when
485
  // we are using the performance analyzer.
486
  // Disable this when testing the analyzer with fastdebug.
487
  fatal("invalid bci or invalid scope desc");
488
}
489
#endif
490

491
vframeStream::vframeStream(JavaThread* thread, Handle continuation_scope, bool stop_at_java_call_stub)
492
 : vframeStreamCommon(RegisterMap(thread,
493
                                  RegisterMap::UpdateMap::include,
494
                                  RegisterMap::ProcessFrames::include,
495
                                  RegisterMap::WalkContinuation::include)) {
496

497
  _stop_at_java_call_stub = stop_at_java_call_stub;
498
  _continuation_scope = continuation_scope;
499

500
  if (!thread->has_last_Java_frame()) {
501
    _mode = at_end_mode;
502
    return;
503
  }
504

505
  _frame = _thread->last_frame();
506
  _cont_entry = _thread->last_continuation();
507
  while (!fill_from_frame()) {
508
    _frame = _frame.sender(&_reg_map);
509
  }
510
}
511

512
vframeStream::vframeStream(oop continuation, Handle continuation_scope)
513
 : vframeStreamCommon(RegisterMap(continuation, RegisterMap::UpdateMap::include)) {
514

515
  _stop_at_java_call_stub = false;
516
  _continuation_scope = continuation_scope;
517

518
  if (!Continuation::has_last_Java_frame(continuation, &_frame, &_reg_map)) {
519
    _mode = at_end_mode;
520
    return;
521
  }
522

523
  // _chunk = _reg_map.stack_chunk();
524
  while (!fill_from_frame()) {
525
    _frame = _frame.sender(&_reg_map);
526
  }
527
}
528

529

530
// Step back n frames, skip any pseudo frames in between.
531
// This function is used in Class.forName, Class.newInstance, Method.Invoke,
532
// AccessController.doPrivileged.
533
void vframeStreamCommon::security_get_caller_frame(int depth) {
534
  assert(depth >= 0, "invalid depth: %d", depth);
535
  for (int n = 0; !at_end(); security_next()) {
536
    if (!method()->is_ignored_by_security_stack_walk()) {
537
      if (n == depth) {
538
        // We have reached the desired depth; return.
539
        return;
540
      }
541
      n++;  // this is a non-skipped frame; count it against the depth
542
    }
543
  }
544
  // NOTE: At this point there were not enough frames on the stack
545
  // to walk to depth.  Callers of this method have to check for at_end.
546
}
547

548

549
void vframeStreamCommon::security_next() {
550
  if (method()->is_prefixed_native()) {
551
    skip_prefixed_method_and_wrappers();  // calls next()
552
  } else {
553
    next();
554
  }
555
}
556

557

558
void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
559
  ResourceMark rm;
560

561
  int    method_prefix_count = 0;
562
  char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
563
  Klass* prefixed_klass = method()->method_holder();
564
  const char* prefixed_name = method()->name()->as_C_string();
565
  size_t prefixed_name_len = strlen(prefixed_name);
566
  int prefix_index = method_prefix_count-1;
567

568
  while (!at_end()) {
569
    next();
570
    if (method()->method_holder() != prefixed_klass) {
571
      break; // classes don't match, can't be a wrapper
572
    }
573
    const char* name = method()->name()->as_C_string();
574
    size_t name_len = strlen(name);
575
    size_t prefix_len = prefixed_name_len - name_len;
576
    if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
577
      break; // prefixed name isn't prefixed version of method name, can't be a wrapper
578
    }
579
    for (; prefix_index >= 0; --prefix_index) {
580
      const char* possible_prefix = method_prefixes[prefix_index];
581
      size_t possible_prefix_len = strlen(possible_prefix);
582
      if (possible_prefix_len == prefix_len &&
583
          strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
584
        break; // matching prefix found
585
      }
586
    }
587
    if (prefix_index < 0) {
588
      break; // didn't find the prefix, can't be a wrapper
589
    }
590
    prefixed_name = name;
591
    prefixed_name_len = name_len;
592
  }
593
}
594

595
javaVFrame* vframeStreamCommon::asJavaVFrame() {
596
  javaVFrame* result = nullptr;
597
  // FIXME, need to re-do JDK-8271140 and check is_native_frame?
598
  if (_mode == compiled_mode && _frame.is_compiled_frame()) {
599
    assert(_frame.is_compiled_frame() || _frame.is_native_frame(), "expected compiled Java frame");
600
    guarantee(_reg_map.update_map(), "");
601

602
    compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
603

604
    guarantee(cvf->cb() == cb(), "wrong code blob");
605

606
    cvf = cvf->at_scope(_decode_offset, _vframe_id); // get the same scope as this stream
607

608
    guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
609
    guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
610
    guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
611

612
    result = cvf;
613
  } else {
614
    result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
615
  }
616
  assert(result->method() == method(), "wrong method");
617
  return result;
618
}
619

620
#ifndef PRODUCT
621
void vframe::print(outputStream* output) {
622
  if (WizardMode) _fr.print_value_on(output, nullptr);
623
}
624

625
void vframe::print_value(outputStream* output) const {
626
  ((vframe*)this)->print(output);
627
}
628

629

630
void entryVFrame::print_value(outputStream* output) const {
631
  ((entryVFrame*)this)->print(output);
632
}
633

634
void entryVFrame::print(outputStream* output) {
635
  vframe::print(output);
636
  output->print_cr("C Chunk in between Java");
637
  output->print_cr("C     link " INTPTR_FORMAT, p2i(_fr.link()));
638
}
639

640

641
// ------------- javaVFrame --------------
642

643
static void print_stack_values(outputStream* output, const char* title, StackValueCollection* values) {
644
  if (values->is_empty()) return;
645
  output->print_cr("\t%s:", title);
646
  values->print();
647
}
648

649

650
void javaVFrame::print(outputStream* output) {
651
  Thread* current_thread = Thread::current();
652
  ResourceMark rm(current_thread);
653
  HandleMark hm(current_thread);
654

655
  vframe::print(output);
656
  output->print("\t");
657
  method()->print_value();
658
  output->cr();
659
  output->print_cr("\tbci:    %d", bci());
660

661
  print_stack_values(output, "locals",      locals());
662
  print_stack_values(output, "expressions", expressions());
663

664
  GrowableArray<MonitorInfo*>* list = monitors();
665
  if (list->is_empty()) return;
666
  output->print_cr("\tmonitor list:");
667
  for (int index = (list->length()-1); index >= 0; index--) {
668
    MonitorInfo* monitor = list->at(index);
669
    output->print("\t  obj\t");
670
    if (monitor->owner_is_scalar_replaced()) {
671
      Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
672
      output->print("( is scalar replaced %s)", k->external_name());
673
    } else if (monitor->owner() == nullptr) {
674
      output->print("( null )");
675
    } else {
676
      monitor->owner()->print_value();
677
      output->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
678
    }
679
    if (monitor->eliminated()) {
680
      if(is_compiled_frame()) {
681
        output->print(" ( lock is eliminated in compiled frame )");
682
      } else {
683
        output->print(" ( lock is eliminated, frame not compiled )");
684
      }
685
    }
686
    output->cr();
687
    output->print("\t  ");
688
    monitor->lock()->print_on(output, monitor->owner());
689
    output->cr();
690
  }
691
}
692

693

694
void javaVFrame::print_value(outputStream* output) const {
695
  Method*    m = method();
696
  InstanceKlass*     k = m->method_holder();
697
  output->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
698
                p2i(_fr.sp()),  p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
699
  output->print("%s.%s", k->internal_name(), m->name()->as_C_string());
700

701
  if (!m->is_native()) {
702
    Symbol*  source_name = k->source_file_name();
703
    int        line_number = m->line_number_from_bci(bci());
704
    if (source_name != nullptr && (line_number != -1)) {
705
      output->print("(%s:%d)", source_name->as_C_string(), line_number);
706
    }
707
  } else {
708
    output->print("(Native Method)");
709
  }
710
  // Check frame size and print warning if it looks suspiciously large
711
  if (fr().sp() != nullptr) {
712
    RegisterMap map = *register_map();
713
    uint size = fr().frame_size();
714
#ifdef _LP64
715
    if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
716
#else
717
    if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
718
#endif
719
  }
720
}
721

722
void javaVFrame::print_activation(int index, outputStream* output) const {
723
  // frame number and method
724
  output->print("%2d - ", index);
725
  ((vframe*)this)->print_value();
726
  output->cr();
727

728
  if (WizardMode) {
729
    ((vframe*)this)->print();
730
    output->cr();
731
  }
732
}
733

734
// ------------- externalVFrame --------------
735

736
void externalVFrame::print(outputStream* output) {
737
  _fr.print_value_on(output, nullptr);
738
}
739

740
void externalVFrame::print_value(outputStream* output) const {
741
  ((vframe*)this)->print(output);
742
}
743
#endif // PRODUCT
744