hotspot/src/share/vm/runtime/deoptimization.cpp
author never
Tue, 19 Oct 2010 16:14:34 -0700
changeset 7106 867c9d296c6b
parent 6740 2bc601284215
child 7397 5b173b4ca846
permissions -rw-r--r--
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places Reviewed-by: kvn, twisti
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/*
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 * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl"
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#include "incls/_deoptimization.cpp.incl"
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bool DeoptimizationMarker::_is_active = false;
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Deoptimization::UnrollBlock::UnrollBlock(int  size_of_deoptimized_frame,
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                                         int  caller_adjustment,
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                                         int  number_of_frames,
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                                         intptr_t* frame_sizes,
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                                         address* frame_pcs,
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                                         BasicType return_type) {
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  _size_of_deoptimized_frame = size_of_deoptimized_frame;
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  _caller_adjustment         = caller_adjustment;
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  _number_of_frames          = number_of_frames;
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  _frame_sizes               = frame_sizes;
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  _frame_pcs                 = frame_pcs;
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  _register_block            = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2);
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  _return_type               = return_type;
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  // PD (x86 only)
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  _counter_temp              = 0;
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  _initial_fp                = 0;
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  _unpack_kind               = 0;
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  _sender_sp_temp            = 0;
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  _total_frame_sizes         = size_of_frames();
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}
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Deoptimization::UnrollBlock::~UnrollBlock() {
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  FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes);
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  FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs);
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  FREE_C_HEAP_ARRAY(intptr_t, _register_block);
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}
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intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const {
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  assert(register_number < RegisterMap::reg_count, "checking register number");
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  return &_register_block[register_number * 2];
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}
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int Deoptimization::UnrollBlock::size_of_frames() const {
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  // Acount first for the adjustment of the initial frame
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  int result = _caller_adjustment;
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  for (int index = 0; index < number_of_frames(); index++) {
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    result += frame_sizes()[index];
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  }
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  return result;
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}
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void Deoptimization::UnrollBlock::print() {
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  ttyLocker ttyl;
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  tty->print_cr("UnrollBlock");
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  tty->print_cr("  size_of_deoptimized_frame = %d", _size_of_deoptimized_frame);
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  tty->print(   "  frame_sizes: ");
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  for (int index = 0; index < number_of_frames(); index++) {
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    tty->print("%d ", frame_sizes()[index]);
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  }
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  tty->cr();
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}
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// In order to make fetch_unroll_info work properly with escape
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// analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and
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// ResetNoHandleMark and HandleMark were removed from it. The actual reallocation
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// of previously eliminated objects occurs in realloc_objects, which is
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// called from the method fetch_unroll_info_helper below.
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JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread))
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  // It is actually ok to allocate handles in a leaf method. It causes no safepoints,
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  // but makes the entry a little slower. There is however a little dance we have to
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  // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro
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  // fetch_unroll_info() is called at the beginning of the deoptimization
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  // handler. Note this fact before we start generating temporary frames
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  // that can confuse an asynchronous stack walker. This counter is
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  // decremented at the end of unpack_frames().
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  thread->inc_in_deopt_handler();
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  return fetch_unroll_info_helper(thread);
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JRT_END
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// This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap)
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Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) {
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  // Note: there is a safepoint safety issue here. No matter whether we enter
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  // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once
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  // the vframeArray is created.
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  //
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  // Allocate our special deoptimization ResourceMark
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  DeoptResourceMark* dmark = new DeoptResourceMark(thread);
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  assert(thread->deopt_mark() == NULL, "Pending deopt!");
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  thread->set_deopt_mark(dmark);
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  frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect
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  RegisterMap map(thread, true);
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  RegisterMap dummy_map(thread, false);
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  // Now get the deoptee with a valid map
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  frame deoptee = stub_frame.sender(&map);
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  // Set the deoptee nmethod
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  assert(thread->deopt_nmethod() == NULL, "Pending deopt!");
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  thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null());
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  // Create a growable array of VFrames where each VFrame represents an inlined
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  // Java frame.  This storage is allocated with the usual system arena.
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  assert(deoptee.is_compiled_frame(), "Wrong frame type");
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  GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10);
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  vframe* vf = vframe::new_vframe(&deoptee, &map, thread);
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  while (!vf->is_top()) {
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    assert(vf->is_compiled_frame(), "Wrong frame type");
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    chunk->push(compiledVFrame::cast(vf));
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    vf = vf->sender();
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  }
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  assert(vf->is_compiled_frame(), "Wrong frame type");
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  chunk->push(compiledVFrame::cast(vf));
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#ifdef COMPILER2
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  // Reallocate the non-escaping objects and restore their fields. Then
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  // relock objects if synchronization on them was eliminated.
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  if (DoEscapeAnalysis) {
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    if (EliminateAllocations) {
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      assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames");
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      GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects();
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      // The flag return_oop() indicates call sites which return oop
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      // in compiled code. Such sites include java method calls,
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      // runtime calls (for example, used to allocate new objects/arrays
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      // on slow code path) and any other calls generated in compiled code.
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      // It is not guaranteed that we can get such information here only
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      // by analyzing bytecode in deoptimized frames. This is why this flag
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      // is set during method compilation (see Compile::Process_OopMap_Node()).
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      bool save_oop_result = chunk->at(0)->scope()->return_oop();
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      Handle return_value;
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      if (save_oop_result) {
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        // Reallocation may trigger GC. If deoptimization happened on return from
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        // call which returns oop we need to save it since it is not in oopmap.
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        oop result = deoptee.saved_oop_result(&map);
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        assert(result == NULL || result->is_oop(), "must be oop");
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        return_value = Handle(thread, result);
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        assert(Universe::heap()->is_in_or_null(result), "must be heap pointer");
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        if (TraceDeoptimization) {
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          tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread);
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        }
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      }
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      bool reallocated = false;
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      if (objects != NULL) {
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        JRT_BLOCK
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          reallocated = realloc_objects(thread, &deoptee, objects, THREAD);
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        JRT_END
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      }
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      if (reallocated) {
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        reassign_fields(&deoptee, &map, objects);
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#ifndef PRODUCT
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        if (TraceDeoptimization) {
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          ttyLocker ttyl;
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          tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread);
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          print_objects(objects);
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        }
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#endif
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      }
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      if (save_oop_result) {
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        // Restore result.
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        deoptee.set_saved_oop_result(&map, return_value());
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      }
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    }
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    if (EliminateLocks) {
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#ifndef PRODUCT
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      bool first = true;
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#endif
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      for (int i = 0; i < chunk->length(); i++) {
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        compiledVFrame* cvf = chunk->at(i);
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        assert (cvf->scope() != NULL,"expect only compiled java frames");
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        GrowableArray<MonitorInfo*>* monitors = cvf->monitors();
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        if (monitors->is_nonempty()) {
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          relock_objects(monitors, thread);
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#ifndef PRODUCT
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          if (TraceDeoptimization) {
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            ttyLocker ttyl;
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            for (int j = 0; j < monitors->length(); j++) {
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              MonitorInfo* mi = monitors->at(j);
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              if (mi->eliminated()) {
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                if (first) {
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                  first = false;
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                  tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread);
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                }
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                tty->print_cr("     object <" INTPTR_FORMAT "> locked", mi->owner());
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              }
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            }
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          }
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#endif
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        }
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      }
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    }
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  }
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#endif // COMPILER2
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  // Ensure that no safepoint is taken after pointers have been stored
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  // in fields of rematerialized objects.  If a safepoint occurs from here on
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  // out the java state residing in the vframeArray will be missed.
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  No_Safepoint_Verifier no_safepoint;
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  vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk);
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  assert(thread->vframe_array_head() == NULL, "Pending deopt!");;
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  thread->set_vframe_array_head(array);
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  // Now that the vframeArray has been created if we have any deferred local writes
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  // added by jvmti then we can free up that structure as the data is now in the
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  // vframeArray
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  if (thread->deferred_locals() != NULL) {
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    GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals();
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    int i = 0;
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    do {
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      // Because of inlining we could have multiple vframes for a single frame
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      // and several of the vframes could have deferred writes. Find them all.
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      if (list->at(i)->id() == array->original().id()) {
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        jvmtiDeferredLocalVariableSet* dlv = list->at(i);
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        list->remove_at(i);
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        // individual jvmtiDeferredLocalVariableSet are CHeapObj's
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        delete dlv;
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      } else {
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        i++;
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      }
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    } while ( i < list->length() );
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    if (list->length() == 0) {
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      thread->set_deferred_locals(NULL);
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      // free the list and elements back to C heap.
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      delete list;
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    }
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  }
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#ifndef SHARK
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  // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info.
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  CodeBlob* cb = stub_frame.cb();
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  // Verify we have the right vframeArray
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  assert(cb->frame_size() >= 0, "Unexpected frame size");
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  intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size();
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  // If the deopt call site is a MethodHandle invoke call site we have
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  // to adjust the unpack_sp.
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  nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null();
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  if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc()))
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    unpack_sp = deoptee.unextended_sp();
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1
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#ifdef ASSERT
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  assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking");
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  Events::log("fetch unroll sp " INTPTR_FORMAT, unpack_sp);
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#endif
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#else
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  intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp();
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#endif // !SHARK
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1
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  // This is a guarantee instead of an assert because if vframe doesn't match
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  // we will unpack the wrong deoptimized frame and wind up in strange places
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  // where it will be very difficult to figure out what went wrong. Better
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  // to die an early death here than some very obscure death later when the
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  // trail is cold.
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  // Note: on ia64 this guarantee can be fooled by frames with no memory stack
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  // in that it will fail to detect a problem when there is one. This needs
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  // more work in tiger timeframe.
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  guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack");
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  int number_of_frames = array->frames();
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  // Compute the vframes' sizes.  Note that frame_sizes[] entries are ordered from outermost to innermost
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  // virtual activation, which is the reverse of the elements in the vframes array.
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  intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames);
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  // +1 because we always have an interpreter return address for the final slot.
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  address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1);
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  int callee_parameters = 0;
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  int callee_locals = 0;
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  int popframe_extra_args = 0;
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  // Create an interpreter return address for the stub to use as its return
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  // address so the skeletal frames are perfectly walkable
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  frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0);
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  // PopFrame requires that the preserved incoming arguments from the recently-popped topmost
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  // activation be put back on the expression stack of the caller for reexecution
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  if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) {
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    popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words());
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  }
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  //
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  // frame_sizes/frame_pcs[0] oldest frame (int or c2i)
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  // frame_sizes/frame_pcs[1] next oldest frame (int)
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  // frame_sizes/frame_pcs[n] youngest frame (int)
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  //
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  // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame
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  // owns the space for the return address to it's caller).  Confusing ain't it.
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  //
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  // The vframe array can address vframes with indices running from
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  // 0.._frames-1. Index  0 is the youngest frame and _frame - 1 is the oldest (root) frame.
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  // When we create the skeletal frames we need the oldest frame to be in the zero slot
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  // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk.
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  // so things look a little strange in this loop.
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  //
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  for (int index = 0; index < array->frames(); index++ ) {
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    // frame[number_of_frames - 1 ] = on_stack_size(youngest)
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    // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest))
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    // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest)))
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    frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters,
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                                                                                                    callee_locals,
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                                                                                                    index == 0,
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                                                                                                    popframe_extra_args);
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    // This pc doesn't have to be perfect just good enough to identify the frame
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    // as interpreted so the skeleton frame will be walkable
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    // The correct pc will be set when the skeleton frame is completely filled out
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    // The final pc we store in the loop is wrong and will be overwritten below
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    frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset;
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   338
489c9b5090e2 Initial load
duke
parents:
diff changeset
   339
    callee_parameters = array->element(index)->method()->size_of_parameters();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   340
    callee_locals = array->element(index)->method()->max_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   341
    popframe_extra_args = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   342
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   343
489c9b5090e2 Initial load
duke
parents:
diff changeset
   344
  // Compute whether the root vframe returns a float or double value.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   345
  BasicType return_type;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   346
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   347
    HandleMark hm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   348
    methodHandle method(thread, array->element(0)->method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   349
    Bytecode_invoke* invoke = Bytecode_invoke_at_check(method, array->element(0)->bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   350
    return_type = (invoke != NULL) ? invoke->result_type(thread) : T_ILLEGAL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   351
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   352
489c9b5090e2 Initial load
duke
parents:
diff changeset
   353
  // Compute information for handling adapters and adjusting the frame size of the caller.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   354
  int caller_adjustment = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   355
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
  // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized
489c9b5090e2 Initial load
duke
parents:
diff changeset
   357
  // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather
489c9b5090e2 Initial load
duke
parents:
diff changeset
   358
  // than simply use array->sender.pc(). This requires us to walk the current set of frames
489c9b5090e2 Initial load
duke
parents:
diff changeset
   359
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   360
  frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame
489c9b5090e2 Initial load
duke
parents:
diff changeset
   361
  deopt_sender = deopt_sender.sender(&dummy_map);     // Now deoptee caller
489c9b5090e2 Initial load
duke
parents:
diff changeset
   362
489c9b5090e2 Initial load
duke
parents:
diff changeset
   363
  // Compute the amount the oldest interpreter frame will have to adjust
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
  // its caller's stack by. If the caller is a compiled frame then
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
  // we pretend that the callee has no parameters so that the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
  // extension counts for the full amount of locals and not just
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
  // locals-parms. This is because without a c2i adapter the parm
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
  // area as created by the compiled frame will not be usable by
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
  // the interpreter. (Depending on the calling convention there
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
  // may not even be enough space).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
  // QQQ I'd rather see this pushed down into last_frame_adjust
489c9b5090e2 Initial load
duke
parents:
diff changeset
   373
  // and have it take the sender (aka caller).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   374
489c9b5090e2 Initial load
duke
parents:
diff changeset
   375
  if (deopt_sender.is_compiled_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
    caller_adjustment = last_frame_adjust(0, callee_locals);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   377
  } else if (callee_locals > callee_parameters) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
    // The caller frame may need extending to accommodate
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
    // non-parameter locals of the first unpacked interpreted frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
    // Compute that adjustment.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
    caller_adjustment = last_frame_adjust(callee_parameters, callee_locals);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  // If the sender is deoptimized the we must retrieve the address of the handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
  // since the frame will "magically" show the original pc before the deopt
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
  // and we'd undo the deopt.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  frame_pcs[0] = deopt_sender.raw_pc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
6187
4fa7845f7c14 6976186: integrate Shark HotSpot changes
twisti
parents: 5547
diff changeset
   391
#ifndef SHARK
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
  assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc");
6187
4fa7845f7c14 6976186: integrate Shark HotSpot changes
twisti
parents: 5547
diff changeset
   393
#endif // SHARK
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   394
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
  UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
                                      caller_adjustment * BytesPerWord,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
                                      number_of_frames,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
                                      frame_sizes,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
                                      frame_pcs,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
                                      return_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
#if defined(IA32) || defined(AMD64)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
  // We need a way to pass fp to the unpacking code so the skeletal frames
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
  // come out correct. This is only needed for x86 because of c2 using ebp
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
  // as an allocatable register. So this update is useless (and harmless)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
  // on the other platforms. It would be nice to do this in a different
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
  // way but even the old style deoptimization had a problem with deriving
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
  // this value. NEEDS_CLEANUP
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
  // Note: now that c1 is using c2's deopt blob we must do this on all
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
  // x86 based platforms
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
  intptr_t** fp_addr = (intptr_t**) (((address)info) + info->initial_fp_offset_in_bytes());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
  *fp_addr = array->sender().fp(); // was adapter_caller
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
#endif /* IA32 || AMD64 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  if (array->frames() > 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
    if (VerifyStack && TraceDeoptimization) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
      tty->print_cr("Deoptimizing method containing inlining");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  array->set_unroll_block(info);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
  return info;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
// Called to cleanup deoptimization data structures in normal case
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
// after unpacking to stack and when stack overflow error occurs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
void Deoptimization::cleanup_deopt_info(JavaThread *thread,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
                                        vframeArray *array) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  // Get array if coming from exception
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  if (array == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
    array = thread->vframe_array_head();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
  thread->set_vframe_array_head(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  // Free the previous UnrollBlock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  vframeArray* old_array = thread->vframe_array_last();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
  thread->set_vframe_array_last(array);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  if (old_array != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
    UnrollBlock* old_info = old_array->unroll_block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
    old_array->set_unroll_block(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
    delete old_info;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
    delete old_array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  // Deallocate any resource creating in this routine and any ResourceObjs allocated
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  // inside the vframeArray (StackValueCollections)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  delete thread->deopt_mark();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  thread->set_deopt_mark(NULL);
6740
2bc601284215 6986270: guarantee(*bcp != Bytecodes::_monitorenter || exec_mode != Deoptimization::Unpack_exception) fails
iveresov
parents: 6453
diff changeset
   451
  thread->set_deopt_nmethod(NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
  if (JvmtiExport::can_pop_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
#ifndef CC_INTERP
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    // Regardless of whether we entered this routine with the pending
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    // popframe condition bit set, we should always clear it now
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
    thread->clear_popframe_condition();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
#else
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
    // C++ interpeter will clear has_pending_popframe when it enters
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
    // with method_resume. For deopt_resume2 we clear it now.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
    if (thread->popframe_forcing_deopt_reexecution())
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
        thread->clear_popframe_condition();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
#endif /* CC_INTERP */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  // unpack_frames() is called at the end of the deoptimization handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  // and (in C2) at the end of the uncommon trap handler. Note this fact
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
  // so that an asynchronous stack walker can work again. This counter is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
  // incremented at the beginning of fetch_unroll_info() and (in C2) at
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  // the beginning of uncommon_trap().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
  thread->dec_in_deopt_handler();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
// Return BasicType of value being returned
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  // We are already active int he special DeoptResourceMark any ResourceObj's we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
  // allocate will be freed at the end of the routine.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
  // It is actually ok to allocate handles in a leaf method. It causes no safepoints,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  // but makes the entry a little slower. There is however a little dance we have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
  ResetNoHandleMark rnhm; // No-op in release/product versions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
  HandleMark hm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  frame stub_frame = thread->last_frame();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  // Since the frame to unpack is the top frame of this thread, the vframe_array_head
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  // must point to the vframeArray for the unpack frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
  vframeArray* array = thread->vframe_array_head();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
  if (TraceDeoptimization) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
    tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  UnrollBlock* info = array->unroll_block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
  // Unpack the interpreter frames and any adapter frame (c2 only) we might create.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  array->unpack_to_stack(stub_frame, exec_mode);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  BasicType bt = info->return_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  // If we have an exception pending, claim that the return type is an oop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  // so the deopt_blob does not overwrite the exception_oop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  if (exec_mode == Unpack_exception)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    bt = T_OBJECT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
  // Cleanup thread deopt data
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
  cleanup_deopt_info(thread, array);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
  if (VerifyStack) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
    ResourceMark res_mark;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
    // Verify that the just-unpacked frames match the interpreter's
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
    // notions of expression stack and locals
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
    vframeArray* cur_array = thread->vframe_array_last();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
    RegisterMap rm(thread, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
    rm.set_include_argument_oops(false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
    bool is_top_frame = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
    int callee_size_of_parameters = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
    int callee_max_locals = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
    for (int i = 0; i < cur_array->frames(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
      vframeArrayElement* el = cur_array->element(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
      frame* iframe = el->iframe();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
      guarantee(iframe->is_interpreted_frame(), "Wrong frame type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
      // Get the oop map for this bci
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
      InterpreterOopMap mask;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
      int cur_invoke_parameter_size = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
      bool try_next_mask = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
      int next_mask_expression_stack_size = -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
      int top_frame_expression_stack_adjustment = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
      methodHandle mh(thread, iframe->interpreter_frame_method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
      OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
      BytecodeStream str(mh);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
      str.set_start(iframe->interpreter_frame_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
      int max_bci = mh->code_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
      // Get to the next bytecode if possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
      assert(str.bci() < max_bci, "bci in interpreter frame out of bounds");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
      // Check to see if we can grab the number of outgoing arguments
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
      // at an uncommon trap for an invoke (where the compiler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
      // generates debug info before the invoke has executed)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
      Bytecodes::Code cur_code = str.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
      if (cur_code == Bytecodes::_invokevirtual ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
          cur_code == Bytecodes::_invokespecial ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
          cur_code == Bytecodes::_invokestatic  ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
          cur_code == Bytecodes::_invokeinterface) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
        Bytecode_invoke* invoke = Bytecode_invoke_at(mh, iframe->interpreter_frame_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
        symbolHandle signature(thread, invoke->signature());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
        ArgumentSizeComputer asc(signature);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
        cur_invoke_parameter_size = asc.size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
        if (cur_code != Bytecodes::_invokestatic) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
          // Add in receiver
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
          ++cur_invoke_parameter_size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
      if (str.bci() < max_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
        Bytecodes::Code bc = str.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
        if (bc >= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
          // The interpreter oop map generator reports results before
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
          // the current bytecode has executed except in the case of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
          // calls. It seems to be hard to tell whether the compiler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
          // has emitted debug information matching the "state before"
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
          // a given bytecode or the state after, so we try both
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
          switch (cur_code) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
            case Bytecodes::_invokevirtual:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
            case Bytecodes::_invokespecial:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
            case Bytecodes::_invokestatic:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
            case Bytecodes::_invokeinterface:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
            case Bytecodes::_athrow:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
              break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
            default: {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
              InterpreterOopMap next_mask;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
              OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
              next_mask_expression_stack_size = next_mask.expression_stack_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
              // Need to subtract off the size of the result type of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
              // the bytecode because this is not described in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
              // debug info but returned to the interpreter in the TOS
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
              // caching register
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
              BasicType bytecode_result_type = Bytecodes::result_type(cur_code);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
              if (bytecode_result_type != T_ILLEGAL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
                top_frame_expression_stack_adjustment = type2size[bytecode_result_type];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
              assert(top_frame_expression_stack_adjustment >= 0, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
              try_next_mask = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
              break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
      // Verify stack depth and oops in frame
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
      // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
      if (!(
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
            /* SPARC */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
            (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
            /* x86 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
            (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
            (try_next_mask &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
             (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size -
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
                                                                    top_frame_expression_stack_adjustment))) ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
            (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
            (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
             (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
            )) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
        ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
        // Print out some information that will help us debug the problem
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
        tty->print_cr("Wrong number of expression stack elements during deoptimization");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
        tty->print_cr("  Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
        tty->print_cr("  Fabricated interpreter frame had %d expression stack elements",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
                      iframe->interpreter_frame_expression_stack_size());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
        tty->print_cr("  Interpreter oop map had %d expression stack elements", mask.expression_stack_size());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
        tty->print_cr("  try_next_mask = %d", try_next_mask);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
        tty->print_cr("  next_mask_expression_stack_size = %d", next_mask_expression_stack_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
        tty->print_cr("  callee_size_of_parameters = %d", callee_size_of_parameters);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
        tty->print_cr("  callee_max_locals = %d", callee_max_locals);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
        tty->print_cr("  top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
        tty->print_cr("  exec_mode = %d", exec_mode);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
        tty->print_cr("  cur_invoke_parameter_size = %d", cur_invoke_parameter_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
        tty->print_cr("  Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
        tty->print_cr("  Interpreted frames:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
        for (int k = 0; k < cur_array->frames(); k++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
          vframeArrayElement* el = cur_array->element(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
          tty->print_cr("    %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
        cur_array->print_on_2(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
        guarantee(false, "wrong number of expression stack elements during deopt");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
      VerifyOopClosure verify;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
      iframe->oops_interpreted_do(&verify, &rm, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
      callee_size_of_parameters = mh->size_of_parameters();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
      callee_max_locals = mh->max_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
      is_top_frame = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
#endif /* !PRODUCT */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  return bt;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
int Deoptimization::deoptimize_dependents() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
  Threads::deoptimized_wrt_marked_nmethods();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
  return 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
#ifdef COMPILER2
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
  Handle pending_exception(thread->pending_exception());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
  const char* exception_file = thread->exception_file();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  int exception_line = thread->exception_line();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  thread->clear_pending_exception();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
  for (int i = 0; i < objects->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
    assert(objects->at(i)->is_object(), "invalid debug information");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
    ObjectValue* sv = (ObjectValue*) objects->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
    KlassHandle k(((ConstantOopReadValue*) sv->klass())->value()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
    oop obj = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
    if (k->oop_is_instance()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
      instanceKlass* ik = instanceKlass::cast(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
      obj = ik->allocate_instance(CHECK_(false));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
    } else if (k->oop_is_typeArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
      typeArrayKlass* ak = typeArrayKlass::cast(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
      assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
      int len = sv->field_size() / type2size[ak->element_type()];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
      obj = ak->allocate(len, CHECK_(false));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
    } else if (k->oop_is_objArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
      objArrayKlass* ak = objArrayKlass::cast(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
      obj = ak->allocate(sv->field_size(), CHECK_(false));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
    assert(obj != NULL, "allocation failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
    assert(sv->value().is_null(), "redundant reallocation");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
    sv->set_value(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
  if (pending_exception.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
    thread->set_pending_exception(pending_exception(), exception_file, exception_line);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
// This assumes that the fields are stored in ObjectValue in the same order
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
// they are yielded by do_nonstatic_fields.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
class FieldReassigner: public FieldClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
  frame* _fr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
  RegisterMap* _reg_map;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
  ObjectValue* _sv;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
  instanceKlass* _ik;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
  oop _obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
  int _i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
  FieldReassigner(frame* fr, RegisterMap* reg_map, ObjectValue* sv, oop obj) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
    _fr(fr), _reg_map(reg_map), _sv(sv), _obj(obj), _i(0) {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
  int i() const { return _i; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
  void do_field(fieldDescriptor* fd) {
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   713
    intptr_t val;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
    StackValue* value =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
      StackValue::create_stack_value(_fr, _reg_map, _sv->field_at(i()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
    int offset = fd->offset();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
    switch (fd->field_type()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
    case T_OBJECT: case T_ARRAY:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
      assert(value->type() == T_OBJECT, "Agreement.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
      _obj->obj_field_put(offset, value->get_obj()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
    case T_LONG: case T_DOUBLE: {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
      assert(value->type() == T_INT, "Agreement.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
      StackValue* low =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
        StackValue::create_stack_value(_fr, _reg_map, _sv->field_at(++_i));
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   727
#ifdef _LP64
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   728
      jlong res = (jlong)low->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   729
#else
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   730
#ifdef SPARC
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   731
      // For SPARC we have to swap high and low words.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   732
      jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int());
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   733
#else
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
      jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int());
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   735
#endif //SPARC
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   736
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
      _obj->long_field_put(offset, res);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
    }
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   740
    // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
    case T_INT: case T_FLOAT: // 4 bytes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
      assert(value->type() == T_INT, "Agreement.");
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   743
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   744
      _obj->int_field_put(offset, (jint)*((jint*)&val));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
    case T_SHORT: case T_CHAR: // 2 bytes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
      assert(value->type() == T_INT, "Agreement.");
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   749
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   750
      _obj->short_field_put(offset, (jshort)*((jint*)&val));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   753
    case T_BOOLEAN: case T_BYTE: // 1 byte
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
      assert(value->type() == T_INT, "Agreement.");
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   755
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   756
      _obj->bool_field_put(offset, (jboolean)*((jint*)&val));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
    default:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
      ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
    _i++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
// restore elements of an eliminated type array
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  int index = 0;
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   769
  intptr_t val;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
  for (int i = 0; i < sv->field_size(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
    StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
    switch(type) {
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   774
    case T_LONG: case T_DOUBLE: {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   775
      assert(value->type() == T_INT, "Agreement.");
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   776
      StackValue* low =
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   777
        StackValue::create_stack_value(fr, reg_map, sv->field_at(++i));
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   778
#ifdef _LP64
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   779
      jlong res = (jlong)low->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   780
#else
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   781
#ifdef SPARC
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   782
      // For SPARC we have to swap high and low words.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   783
      jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int());
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   784
#else
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   785
      jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int());
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   786
#endif //SPARC
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   787
#endif
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   788
      obj->long_at_put(index, res);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   789
      break;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   790
    }
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   791
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   792
    // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   793
    case T_INT: case T_FLOAT: // 4 bytes.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   794
      assert(value->type() == T_INT, "Agreement.");
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   795
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   796
      obj->int_at_put(index, (jint)*((jint*)&val));
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   797
      break;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   798
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   799
    case T_SHORT: case T_CHAR: // 2 bytes
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   800
      assert(value->type() == T_INT, "Agreement.");
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   801
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   802
      obj->short_at_put(index, (jshort)*((jint*)&val));
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   803
      break;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   804
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   805
    case T_BOOLEAN: case T_BYTE: // 1 byte
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   806
      assert(value->type() == T_INT, "Agreement.");
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   807
      val = value->get_int();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   808
      obj->bool_at_put(index, (jboolean)*((jint*)&val));
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   809
      break;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   810
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
      default:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
        ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
    index++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
// restore fields of an eliminated object array
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
  for (int i = 0; i < sv->field_size(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
    StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
    assert(value->type() == T_OBJECT, "object element expected");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
    obj->obj_at_put(i, value->get_obj()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
// restore fields of all eliminated objects and arrays
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
  for (int i = 0; i < objects->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
    ObjectValue* sv = (ObjectValue*) objects->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
    KlassHandle k(((ConstantOopReadValue*) sv->klass())->value()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
    Handle obj = sv->value();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
    assert(obj.not_null(), "reallocation was missed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
    if (k->oop_is_instance()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
      instanceKlass* ik = instanceKlass::cast(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
      FieldReassigner reassign(fr, reg_map, sv, obj());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
      ik->do_nonstatic_fields(&reassign);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
    } else if (k->oop_is_typeArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
      typeArrayKlass* ak = typeArrayKlass::cast(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
      reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
    } else if (k->oop_is_objArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
      reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
// relock objects for which synchronization was eliminated
256
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   852
void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
  for (int i = 0; i < monitors->length(); i++) {
256
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   854
    MonitorInfo* mon_info = monitors->at(i);
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   855
    if (mon_info->eliminated()) {
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   856
      assert(mon_info->owner() != NULL, "reallocation was missed");
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   857
      Handle obj = Handle(mon_info->owner());
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   858
      markOop mark = obj->mark();
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   859
      if (UseBiasedLocking && mark->has_bias_pattern()) {
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   860
        // New allocated objects may have the mark set to anonymously biased.
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   861
        // Also the deoptimized method may called methods with synchronization
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   862
        // where the thread-local object is bias locked to the current thread.
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   863
        assert(mark->is_biased_anonymously() ||
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   864
               mark->biased_locker() == thread, "should be locked to current thread");
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   865
        // Reset mark word to unbiased prototype.
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   866
        markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age());
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   867
        obj->set_mark(unbiased_prototype);
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   868
      }
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   869
      BasicLock* lock = mon_info->lock();
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   870
      ObjectSynchronizer::slow_enter(obj, lock, thread);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
    }
256
70fdc3927a4e 6681646: Relocking of a scalar replaced object during deoptimization is broken
kvn
parents: 217
diff changeset
   872
    assert(mon_info->owner()->is_locked(), "object must be locked now");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
// print information about reallocated objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
  fieldDescriptor fd;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
  for (int i = 0; i < objects->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
    ObjectValue* sv = (ObjectValue*) objects->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
    KlassHandle k(((ConstantOopReadValue*) sv->klass())->value()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
    Handle obj = sv->value();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
    tty->print("     object <" INTPTR_FORMAT "> of type ", sv->value()());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
    k->as_klassOop()->print_value();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
    tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
    if (Verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
      k->oop_print_on(obj(), tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
#endif // COMPILER2
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
  if (TraceDeoptimization) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
    ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
    tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
    fr.print_on(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
    tty->print_cr("     Virtual frames (innermost first):");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
    for (int index = 0; index < chunk->length(); index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
      compiledVFrame* vf = chunk->at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
      tty->print("       %2d - ", index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
      vf->print_value();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
      int bci = chunk->at(index)->raw_bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
      const char* code_name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
      if (bci == SynchronizationEntryBCI) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
        code_name = "sync entry";
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
        Bytecodes::Code code = Bytecodes::code_at(vf->method(), bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
        code_name = Bytecodes::name(code);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
      tty->print(" - %s", code_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
      tty->print_cr(" @ bci %d ", bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
      if (Verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
        vf->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
  // Register map for next frame (used for stack crawl).  We capture
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
  // the state of the deopt'ing frame's caller.  Thus if we need to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
  // stuff a C2I adapter we can properly fill in the callee-save
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
  // register locations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
  frame caller = fr.sender(reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
  int frame_size = caller.sp() - fr.sp();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
  frame sender = caller;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
  // Since the Java thread being deoptimized will eventually adjust it's own stack,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
  // the vframeArray containing the unpacking information is allocated in the C heap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
  // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   942
  vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   943
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
  // Compare the vframeArray to the collected vframes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
  assert(array->structural_compare(thread, chunk), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
  Events::log("# vframes = %d", (intptr_t)chunk->length());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
  if (TraceDeoptimization) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
    ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
    tty->print_cr("     Created vframeArray " INTPTR_FORMAT, array);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   952
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
#endif // PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
  return array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
  GrowableArray<MonitorInfo*>* monitors = cvf->monitors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
  for (int i = 0; i < monitors->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
    MonitorInfo* mon_info = monitors->at(i);
3171
aa289b22b577 6837472: com/sun/jdi/MonitorFrameInfo.java fails with AggressiveOpts in 6u14
kvn
parents: 670
diff changeset
   963
    if (!mon_info->eliminated() && mon_info->owner() != NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
      objects_to_revoke->append(Handle(mon_info->owner()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   971
  if (!UseBiasedLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
  GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
  // Unfortunately we don't have a RegisterMap available in most of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
  // the places we want to call this routine so we need to walk the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
  // stack again to update the register map.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
  if (map == NULL || !map->update_map()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
    StackFrameStream sfs(thread, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    bool found = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
    while (!found && !sfs.is_done()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
      frame* cur = sfs.current();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
      sfs.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
      found = cur->id() == fr.id();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
    assert(found, "frame to be deoptimized not found on target thread's stack");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
    map = sfs.register_map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
  vframe* vf = vframe::new_vframe(&fr, map, thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  compiledVFrame* cvf = compiledVFrame::cast(vf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
  // Revoke monitors' biases in all scopes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
  while (!cvf->is_top()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
    collect_monitors(cvf, objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
    cvf = compiledVFrame::cast(cvf->sender());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
  collect_monitors(cvf, objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
  if (SafepointSynchronize::is_at_safepoint()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
    BiasedLocking::revoke_at_safepoint(objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
    BiasedLocking::revoke(objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
  if (!UseBiasedLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
  assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
  GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
  for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
    if (jt->has_last_Java_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
      StackFrameStream sfs(jt, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
      while (!sfs.is_done()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
        frame* cur = sfs.current();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
        if (cb->contains(cur->pc())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
          vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
          compiledVFrame* cvf = compiledVFrame::cast(vf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
          // Revoke monitors' biases in all scopes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
          while (!cvf->is_top()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
            collect_monitors(cvf, objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
            cvf = compiledVFrame::cast(cvf->sender());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
          collect_monitors(cvf, objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
        sfs.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
  BiasedLocking::revoke_at_safepoint(objects_to_revoke);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
  assert(fr.can_be_deoptimized(), "checking frame type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
  gather_statistics(Reason_constraint, Action_none, Bytecodes::_illegal);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  EventMark m("Deoptimization (pc=" INTPTR_FORMAT ", sp=" INTPTR_FORMAT ")", fr.pc(), fr.id());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  // Patch the nmethod so that when execution returns to it we will
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
  // deopt the execution state and return to the interpreter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
  fr.deoptimize(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
  // Deoptimize only if the frame comes from compile code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
  // Do not deoptimize the frame which is already patched
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
  // during the execution of the loops below.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
  if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
  DeoptimizationMarker dm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
  if (UseBiasedLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
    revoke_biases_of_monitors(thread, fr, map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
  deoptimize_single_frame(thread, fr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
7106
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1068
void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id) {
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1069
  assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(),
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1070
         "can only deoptimize other thread at a safepoint");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
  // Compute frame and register map based on thread and sp.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
  RegisterMap reg_map(thread, UseBiasedLocking);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
  frame fr = thread->last_frame();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
  while (fr.id() != id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
    fr = fr.sender(&reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
  deoptimize(thread, fr, &reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
7106
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1081
void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) {
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1082
  if (thread == Thread::current()) {
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1083
    Deoptimization::deoptimize_frame_internal(thread, id);
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1084
  } else {
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1085
    VM_DeoptimizeFrame deopt(thread, id);
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1086
    VMThread::execute(&deopt);
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1087
  }
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1088
}
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1089
867c9d296c6b 6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents: 6740
diff changeset
  1090
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
// JVMTI PopFrame support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
  thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1096
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1097
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1098
6187
4fa7845f7c14 6976186: integrate Shark HotSpot changes
twisti
parents: 5547
diff changeset
  1099
#if defined(COMPILER2) || defined(SHARK)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
  // in case of an unresolved klass entry, load the class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
  if (constant_pool->tag_at(index).is_unresolved_klass()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
    klassOop tk = constant_pool->klass_at(index, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
  if (!constant_pool->tag_at(index).is_symbol()) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1109
  Handle class_loader (THREAD, instanceKlass::cast(constant_pool->pool_holder())->class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
  symbolHandle symbol (THREAD, constant_pool->symbol_at(index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
  // class name?
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
  if (symbol->byte_at(0) != '(') {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
    Handle protection_domain (THREAD, Klass::cast(constant_pool->pool_holder())->protection_domain());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
    SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
  // then it must be a signature!
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
  for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
    if (ss.is_object()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
      symbolOop s = ss.as_symbol(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
      symbolHandle class_name (THREAD, s);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
      Handle protection_domain (THREAD, Klass::cast(constant_pool->pool_holder())->protection_domain());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
      SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1130
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1131
void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
  EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
  load_class_by_index(constant_pool, index, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
  if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
    // Exception happened during classloading. We ignore the exception here, since it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
    // is going to be rethrown since the current activation is going to be deoptimzied and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
    // the interpreter will re-execute the bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
    CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
  HandleMark hm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
  // uncommon_trap() is called at the beginning of the uncommon trap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
  // handler. Note this fact before we start generating temporary frames
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1147
  // that can confuse an asynchronous stack walker. This counter is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
  // decremented at the end of unpack_frames().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
  thread->inc_in_deopt_handler();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
  // We need to update the map if we have biased locking.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
  RegisterMap reg_map(thread, UseBiasedLocking);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
  frame stub_frame = thread->last_frame();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
  frame fr = stub_frame.sender(&reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
  // Make sure the calling nmethod is not getting deoptimized and removed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
  // before we are done with it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
  nmethodLocker nl(fr.pc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1162
    // Revoke biases of any monitors in the frame to ensure we can migrate them
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
    revoke_biases_of_monitors(thread, fr, &reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
    DeoptReason reason = trap_request_reason(trap_request);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
    DeoptAction action = trap_request_action(trap_request);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
    jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
    Events::log("Uncommon trap occurred @" INTPTR_FORMAT " unloaded_class_index = %d", fr.pc(), (int) trap_request);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
    vframe*  vf  = vframe::new_vframe(&fr, &reg_map, thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
    compiledVFrame* cvf = compiledVFrame::cast(vf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
    nmethod* nm = cvf->code();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
    ScopeDesc*      trap_scope  = cvf->scope();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
    methodHandle    trap_method = trap_scope->method();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
    int             trap_bci    = trap_scope->bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
    Bytecodes::Code trap_bc     = Bytecode_at(trap_method->bcp_from(trap_bci))->java_code();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
    // Record this event in the histogram.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
    gather_statistics(reason, action, trap_bc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1183
    // Ensure that we can record deopt. history:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1184
    bool create_if_missing = ProfileTraps;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
    methodDataHandle trap_mdo
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1187
      (THREAD, get_method_data(thread, trap_method, create_if_missing));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1188
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1189
    // Print a bunch of diagnostics, if requested.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
    if (TraceDeoptimization || LogCompilation) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
      ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
      ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1193
      char buf[100];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
      if (xtty != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1195
        xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1196
                         os::current_thread_id(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
                         format_trap_request(buf, sizeof(buf), trap_request));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
        nm->log_identity(xtty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
      symbolHandle class_name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1201
      bool unresolved = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1202
      if (unloaded_class_index >= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
        constantPoolHandle constants (THREAD, trap_method->constants());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
        if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1205
          class_name = symbolHandle(THREAD,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
            constants->klass_name_at(unloaded_class_index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1207
          unresolved = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1208
          if (xtty != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1209
            xtty->print(" unresolved='1'");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1210
        } else if (constants->tag_at(unloaded_class_index).is_symbol()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1211
          class_name = symbolHandle(THREAD,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
            constants->symbol_at(unloaded_class_index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1214
        if (xtty != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1215
          xtty->name(class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
      if (xtty != NULL && trap_mdo.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
        // Dump the relevant MDO state.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
        // This is the deopt count for the current reason, any previous
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
        // reasons or recompiles seen at this point.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
        int dcnt = trap_mdo->trap_count(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
        if (dcnt != 0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
          xtty->print(" count='%d'", dcnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1224
        ProfileData* pdata = trap_mdo->bci_to_data(trap_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
        int dos = (pdata == NULL)? 0: pdata->trap_state();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1226
        if (dos != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1227
          xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1228
          if (trap_state_is_recompiled(dos)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1229
            int recnt2 = trap_mdo->overflow_recompile_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1230
            if (recnt2 != 0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
              xtty->print(" recompiles2='%d'", recnt2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
      if (xtty != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
        xtty->stamp();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
        xtty->end_head();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1239
      if (TraceDeoptimization) {  // make noise on the tty
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
        tty->print("Uncommon trap occurred in");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1241
        nm->method()->print_short_name(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1242
        tty->print(" (@" INTPTR_FORMAT ") thread=%d reason=%s action=%s unloaded_class_index=%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
                   fr.pc(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
                   (int) os::current_thread_id(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
                   trap_reason_name(reason),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1246
                   trap_action_name(action),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1247
                   unloaded_class_index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1248
        if (class_name.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
          tty->print(unresolved ? " unresolved class: " : " symbol: ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
          class_name->print_symbol_on(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1252
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1253
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
      if (xtty != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
        // Log the precise location of the trap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
        for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
          xtty->begin_elem("jvms bci='%d'", sd->bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
          xtty->method(sd->method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
          xtty->end_elem();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
          if (sd->is_top())  break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1262
        xtty->tail("uncommon_trap");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1263
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1264
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1265
    // (End diagnostic printout.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1267
    // Load class if necessary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1268
    if (unloaded_class_index >= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1269
      constantPoolHandle constants(THREAD, trap_method->constants());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1270
      load_class_by_index(constants, unloaded_class_index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1271
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1272
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1273
    // Flush the nmethod if necessary and desirable.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1274
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1275
    // We need to avoid situations where we are re-flushing the nmethod
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1276
    // because of a hot deoptimization site.  Repeated flushes at the same
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1277
    // point need to be detected by the compiler and avoided.  If the compiler
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1278
    // cannot avoid them (or has a bug and "refuses" to avoid them), this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
    // module must take measures to avoid an infinite cycle of recompilation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
    // and deoptimization.  There are several such measures:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
    //   1. If a recompilation is ordered a second time at some site X
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
    //   and for the same reason R, the action is adjusted to 'reinterpret',
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1284
    //   to give the interpreter time to exercise the method more thoroughly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
    //   If this happens, the method's overflow_recompile_count is incremented.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
    //   2. If the compiler fails to reduce the deoptimization rate, then
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
    //   the method's overflow_recompile_count will begin to exceed the set
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
    //   limit PerBytecodeRecompilationCutoff.  If this happens, the action
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
    //   is adjusted to 'make_not_compilable', and the method is abandoned
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
    //   to the interpreter.  This is a performance hit for hot methods,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
    //   but is better than a disastrous infinite cycle of recompilations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1293
    //   (Actually, only the method containing the site X is abandoned.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1294
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
    //   3. In parallel with the previous measures, if the total number of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
    //   recompilations of a method exceeds the much larger set limit
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1297
    //   PerMethodRecompilationCutoff, the method is abandoned.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1298
    //   This should only happen if the method is very large and has
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1299
    //   many "lukewarm" deoptimizations.  The code which enforces this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1300
    //   limit is elsewhere (class nmethod, class methodOopDesc).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1301
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1302
    // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
    // to recompile at each bytecode independently of the per-BCI cutoff.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
    // The decision to update code is up to the compiler, and is encoded
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1306
    // in the Action_xxx code.  If the compiler requests Action_none
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
    // no trap state is changed, no compiled code is changed, and the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
    // computation suffers along in the interpreter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1309
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
    // The other action codes specify various tactics for decompilation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1311
    // and recompilation.  Action_maybe_recompile is the loosest, and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1312
    // allows the compiled code to stay around until enough traps are seen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1313
    // and until the compiler gets around to recompiling the trapping method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1314
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1315
    // The other actions cause immediate removal of the present code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1316
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
    bool update_trap_state = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1318
    bool make_not_entrant = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1319
    bool make_not_compilable = false;
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1320
    bool reprofile = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
    switch (action) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
    case Action_none:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
      // Keep the old code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
      update_trap_state = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1325
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
    case Action_maybe_recompile:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
      // Do not need to invalidate the present code, but we can
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
      // initiate another
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
      // Start compiler without (necessarily) invalidating the nmethod.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
      // The system will tolerate the old code, but new code should be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
      // generated when possible.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1333
    case Action_reinterpret:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
      // Go back into the interpreter for a while, and then consider
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
      // recompiling form scratch.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
      make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
      // Reset invocation counter for outer most method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
      // This will allow the interpreter to exercise the bytecodes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1339
      // for a while before recompiling.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1340
      // By contrast, Action_make_not_entrant is immediate.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1341
      //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1342
      // Note that the compiler will track null_check, null_assert,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1343
      // range_check, and class_check events and log them as if they
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
      // had been traps taken from compiled code.  This will update
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
      // the MDO trap history so that the next compilation will
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
      // properly detect hot trap sites.
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1347
      reprofile = true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1349
    case Action_make_not_entrant:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1350
      // Request immediate recompilation, and get rid of the old code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1351
      // Make them not entrant, so next time they are called they get
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
      // recompiled.  Unloaded classes are loaded now so recompile before next
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
      // time they are called.  Same for uninitialized.  The interpreter will
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1354
      // link the missing class, if any.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
      make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1357
    case Action_make_not_compilable:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1358
      // Give up on compiling this method at all.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
      make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
      make_not_compilable = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
    default:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1363
      ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1364
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
    // Setting +ProfileTraps fixes the following, on all platforms:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
    // 4852688: ProfileInterpreter is off by default for ia64.  The result is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1368
    // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1369
    // recompile relies on a methodDataOop to record heroic opt failures.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
    // Whether the interpreter is producing MDO data or not, we also need
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1372
    // to use the MDO to detect hot deoptimization points and control
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
    // aggressive optimization.
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1374
    bool inc_recompile_count = false;
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1375
    ProfileData* pdata = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1376
    if (ProfileTraps && update_trap_state && trap_mdo.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
      assert(trap_mdo() == get_method_data(thread, trap_method, false), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
      uint this_trap_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
      bool maybe_prior_trap = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
      bool maybe_prior_recompile = false;
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1381
      pdata = query_update_method_data(trap_mdo, trap_bci, reason,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
                                   //outputs:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
                                   this_trap_count,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
                                   maybe_prior_trap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
                                   maybe_prior_recompile);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
      // Because the interpreter also counts null, div0, range, and class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
      // checks, these traps from compiled code are double-counted.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
      // This is harmless; it just means that the PerXTrapLimit values
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
      // are in effect a little smaller than they look.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
      DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
      if (per_bc_reason != Reason_none) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
        // Now take action based on the partially known per-BCI history.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
        if (maybe_prior_trap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
            && this_trap_count >= (uint)PerBytecodeTrapLimit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
          // If there are too many traps at this BCI, force a recompile.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
          // This will allow the compiler to see the limit overflow, and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
          // take corrective action, if possible.  The compiler generally
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
          // does not use the exact PerBytecodeTrapLimit value, but instead
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
          // changes its tactics if it sees any traps at all.  This provides
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
          // a little hysteresis, delaying a recompile until a trap happens
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
          // several times.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
          //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
          // Actually, since there is only one bit of counter per BCI,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1405
          // the possible per-BCI counts are {0,1,(per-method count)}.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
          // This produces accurate results if in fact there is only
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
          // one hot trap site, but begins to get fuzzy if there are
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1408
          // many sites.  For example, if there are ten sites each
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1409
          // trapping two or more times, they each get the blame for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
          // all of their traps.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
          make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1413
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
        // Detect repeated recompilation at the same BCI, and enforce a limit.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1415
        if (make_not_entrant && maybe_prior_recompile) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
          // More than one recompile at this point.
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1417
          inc_recompile_count = maybe_prior_trap;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
        // For reasons which are not recorded per-bytecode, we simply
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
        // force recompiles unconditionally.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
        // (Note that PerMethodRecompilationCutoff is enforced elsewhere.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
        make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
      // Go back to the compiler if there are too many traps in this method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
      if (this_trap_count >= (uint)PerMethodTrapLimit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
        // If there are too many traps in this method, force a recompile.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
        // This will allow the compiler to see the limit overflow, and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
        // take corrective action, if possible.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
        // (This condition is an unlikely backstop only, because the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
        // PerBytecodeTrapLimit is more likely to take effect first,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
        // if it is applicable.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
        make_not_entrant = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
      // Here's more hysteresis:  If there has been a recompile at
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
      // this trap point already, run the method in the interpreter
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
      // for a while to exercise it more thoroughly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
      if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1441
        reprofile = true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1444
    }
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1445
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1446
    // Take requested actions on the method:
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1447
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1448
    // Recompile
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1449
    if (make_not_entrant) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1450
      if (!nm->make_not_entrant()) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1451
        return; // the call did not change nmethod's state
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1452
      }
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1453
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1454
      if (pdata != NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
        // Record the recompilation event, if any.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
        int tstate0 = pdata->trap_state();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
        int tstate1 = trap_state_set_recompiled(tstate0, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
        if (tstate1 != tstate0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
          pdata->set_trap_state(tstate1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1463
    if (inc_recompile_count) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1464
      trap_mdo->inc_overflow_recompile_count();
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1465
      if ((uint)trap_mdo->overflow_recompile_count() >
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1466
          (uint)PerBytecodeRecompilationCutoff) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1467
        // Give up on the method containing the bad BCI.
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1468
        if (trap_method() == nm->method()) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1469
          make_not_compilable = true;
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1470
        } else {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1471
          trap_method->set_not_compilable(CompLevel_full_optimization);
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1472
          // But give grace to the enclosing nm->method().
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1473
        }
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1474
      }
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1475
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1477
    // Reprofile
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1478
    if (reprofile) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1479
      CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
    // Give up compiling
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1483
    if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
      assert(make_not_entrant, "consistent");
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6187
diff changeset
  1485
      nm->method()->set_not_compilable(CompLevel_full_optimization);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
  } // Free marked resources
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1489
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1490
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1492
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1493
methodDataOop
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
Deoptimization::get_method_data(JavaThread* thread, methodHandle m,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1495
                                bool create_if_missing) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
  Thread* THREAD = thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
  methodDataOop mdo = m()->method_data();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
  if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
    // Build an MDO.  Ignore errors like OutOfMemory;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
    // that simply means we won't have an MDO to update.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
    methodOopDesc::build_interpreter_method_data(m, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
      assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
      CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
    mdo = m()->method_data();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
  return mdo;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1509
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1511
ProfileData*
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
Deoptimization::query_update_method_data(methodDataHandle trap_mdo,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
                                         int trap_bci,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
                                         Deoptimization::DeoptReason reason,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
                                         //outputs:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
                                         uint& ret_this_trap_count,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
                                         bool& ret_maybe_prior_trap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
                                         bool& ret_maybe_prior_recompile) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1519
  uint prior_trap_count = trap_mdo->trap_count(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
  uint this_trap_count  = trap_mdo->inc_trap_count(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1522
  // If the runtime cannot find a place to store trap history,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1523
  // it is estimated based on the general condition of the method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1524
  // If the method has ever been recompiled, or has ever incurred
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1525
  // a trap with the present reason , then this BCI is assumed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1526
  // (pessimistically) to be the culprit.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1527
  bool maybe_prior_trap      = (prior_trap_count != 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1528
  bool maybe_prior_recompile = (trap_mdo->decompile_count() != 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1529
  ProfileData* pdata = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1531
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1532
  // For reasons which are recorded per bytecode, we check per-BCI data.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
  DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1534
  if (per_bc_reason != Reason_none) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1535
    // Find the profile data for this BCI.  If there isn't one,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1536
    // try to allocate one from the MDO's set of spares.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1537
    // This will let us detect a repeated trap at this point.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1538
    pdata = trap_mdo->allocate_bci_to_data(trap_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1539
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1540
    if (pdata != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1541
      // Query the trap state of this profile datum.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1542
      int tstate0 = pdata->trap_state();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1543
      if (!trap_state_has_reason(tstate0, per_bc_reason))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1544
        maybe_prior_trap = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1545
      if (!trap_state_is_recompiled(tstate0))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1546
        maybe_prior_recompile = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1547
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1548
      // Update the trap state of this profile datum.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1549
      int tstate1 = tstate0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1550
      // Record the reason.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1551
      tstate1 = trap_state_add_reason(tstate1, per_bc_reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1552
      // Store the updated state on the MDO, for next time.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1553
      if (tstate1 != tstate0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1554
        pdata->set_trap_state(tstate1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1555
    } else {
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1556
      if (LogCompilation && xtty != NULL) {
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1557
        ttyLocker ttyl;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1558
        // Missing MDP?  Leave a small complaint in the log.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1559
        xtty->elem("missing_mdp bci='%d'", trap_bci);
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1560
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1561
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1562
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1563
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1564
  // Return results:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1565
  ret_this_trap_count = this_trap_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1566
  ret_maybe_prior_trap = maybe_prior_trap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1567
  ret_maybe_prior_recompile = maybe_prior_recompile;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1568
  return pdata;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1569
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1570
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1571
void
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1572
Deoptimization::update_method_data_from_interpreter(methodDataHandle trap_mdo, int trap_bci, int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1573
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1574
  // Ignored outputs:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1575
  uint ignore_this_trap_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1576
  bool ignore_maybe_prior_trap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1577
  bool ignore_maybe_prior_recompile;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1578
  query_update_method_data(trap_mdo, trap_bci,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1579
                           (DeoptReason)reason,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1580
                           ignore_this_trap_count,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1581
                           ignore_maybe_prior_trap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1582
                           ignore_maybe_prior_recompile);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1583
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1584
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1585
Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1586
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1587
  // Still in Java no safepoints
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1588
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1589
    // This enters VM and may safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1590
    uncommon_trap_inner(thread, trap_request);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1591
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1592
  return fetch_unroll_info_helper(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1593
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1594
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1595
// Local derived constants.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1596
// Further breakdown of DataLayout::trap_state, as promised by DataLayout.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1597
const int DS_REASON_MASK   = DataLayout::trap_mask >> 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1598
const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1599
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1600
//---------------------------trap_state_reason---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1601
Deoptimization::DeoptReason
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1602
Deoptimization::trap_state_reason(int trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1603
  // This assert provides the link between the width of DataLayout::trap_bits
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1604
  // and the encoding of "recorded" reasons.  It ensures there are enough
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1605
  // bits to store all needed reasons in the per-BCI MDO profile.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1606
  assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1607
  int recompile_bit = (trap_state & DS_RECOMPILE_BIT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1608
  trap_state -= recompile_bit;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1609
  if (trap_state == DS_REASON_MASK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1610
    return Reason_many;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1611
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1612
    assert((int)Reason_none == 0, "state=0 => Reason_none");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1613
    return (DeoptReason)trap_state;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1614
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1615
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1616
//-------------------------trap_state_has_reason-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1617
int Deoptimization::trap_state_has_reason(int trap_state, int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1618
  assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1619
  assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1620
  int recompile_bit = (trap_state & DS_RECOMPILE_BIT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1621
  trap_state -= recompile_bit;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1622
  if (trap_state == DS_REASON_MASK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1623
    return -1;  // true, unspecifically (bottom of state lattice)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1624
  } else if (trap_state == reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1625
    return 1;   // true, definitely
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1626
  } else if (trap_state == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1627
    return 0;   // false, definitely (top of state lattice)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1628
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1629
    return 0;   // false, definitely
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1630
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1631
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1632
//-------------------------trap_state_add_reason-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1633
int Deoptimization::trap_state_add_reason(int trap_state, int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1634
  assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1635
  int recompile_bit = (trap_state & DS_RECOMPILE_BIT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1636
  trap_state -= recompile_bit;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1637
  if (trap_state == DS_REASON_MASK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1638
    return trap_state + recompile_bit;     // already at state lattice bottom
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1639
  } else if (trap_state == reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1640
    return trap_state + recompile_bit;     // the condition is already true
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1641
  } else if (trap_state == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1642
    return reason + recompile_bit;          // no condition has yet been true
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1643
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1644
    return DS_REASON_MASK + recompile_bit;  // fall to state lattice bottom
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1645
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1646
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1647
//-----------------------trap_state_is_recompiled------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1648
bool Deoptimization::trap_state_is_recompiled(int trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1649
  return (trap_state & DS_RECOMPILE_BIT) != 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1650
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1651
//-----------------------trap_state_set_recompiled-----------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1652
int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1653
  if (z)  return trap_state |  DS_RECOMPILE_BIT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1654
  else    return trap_state & ~DS_RECOMPILE_BIT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1655
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1656
//---------------------------format_trap_state---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1657
// This is used for debugging and diagnostics, including hotspot.log output.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1658
const char* Deoptimization::format_trap_state(char* buf, size_t buflen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1659
                                              int trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1660
  DeoptReason reason      = trap_state_reason(trap_state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1661
  bool        recomp_flag = trap_state_is_recompiled(trap_state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1662
  // Re-encode the state from its decoded components.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1663
  int decoded_state = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1664
  if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1665
    decoded_state = trap_state_add_reason(decoded_state, reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1666
  if (recomp_flag)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1667
    decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1668
  // If the state re-encodes properly, format it symbolically.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1669
  // Because this routine is used for debugging and diagnostics,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1670
  // be robust even if the state is a strange value.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1671
  size_t len;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1672
  if (decoded_state != trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1673
    // Random buggy state that doesn't decode??
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1674
    len = jio_snprintf(buf, buflen, "#%d", trap_state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1675
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1676
    len = jio_snprintf(buf, buflen, "%s%s",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1677
                       trap_reason_name(reason),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1678
                       recomp_flag ? " recompiled" : "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1679
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1680
  if (len >= buflen)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1681
    buf[buflen-1] = '\0';
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1682
  return buf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1683
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1684
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1685
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1686
//--------------------------------statics--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1687
Deoptimization::DeoptAction Deoptimization::_unloaded_action
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1688
  = Deoptimization::Action_reinterpret;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1689
const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1690
  // Note:  Keep this in sync. with enum DeoptReason.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1691
  "none",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1692
  "null_check",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1693
  "null_assert",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1694
  "range_check",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1695
  "class_check",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1696
  "array_check",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1697
  "intrinsic",
4754
8aef16f24e16 6614597: Performance variability in jvm2008 xml.validation
kvn
parents: 4752
diff changeset
  1698
  "bimorphic",
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1699
  "unloaded",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1700
  "uninitialized",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1701
  "unreached",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1702
  "unhandled",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1703
  "constraint",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1704
  "div0_check",
4643
61c659c91c57 6894779: Loop Predication for Loop Optimizer in C2
cfang
parents: 3261
diff changeset
  1705
  "age",
61c659c91c57 6894779: Loop Predication for Loop Optimizer in C2
cfang
parents: 3261
diff changeset
  1706
  "predicate"
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1707
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1708
const char* Deoptimization::_trap_action_name[Action_LIMIT] = {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1709
  // Note:  Keep this in sync. with enum DeoptAction.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1710
  "none",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1711
  "maybe_recompile",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1712
  "reinterpret",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1713
  "make_not_entrant",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1714
  "make_not_compilable"
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1715
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1716
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1717
const char* Deoptimization::trap_reason_name(int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1718
  if (reason == Reason_many)  return "many";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1719
  if ((uint)reason < Reason_LIMIT)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1720
    return _trap_reason_name[reason];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1721
  static char buf[20];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1722
  sprintf(buf, "reason%d", reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1723
  return buf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1724
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1725
const char* Deoptimization::trap_action_name(int action) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1726
  if ((uint)action < Action_LIMIT)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1727
    return _trap_action_name[action];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
  static char buf[20];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1729
  sprintf(buf, "action%d", action);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1730
  return buf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1731
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1732
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1733
// This is used for debugging and diagnostics, including hotspot.log output.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1734
const char* Deoptimization::format_trap_request(char* buf, size_t buflen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1735
                                                int trap_request) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1736
  jint unloaded_class_index = trap_request_index(trap_request);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1737
  const char* reason = trap_reason_name(trap_request_reason(trap_request));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1738
  const char* action = trap_action_name(trap_request_action(trap_request));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1739
  size_t len;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1740
  if (unloaded_class_index < 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1741
    len = jio_snprintf(buf, buflen, "reason='%s' action='%s'",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1742
                       reason, action);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1743
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1744
    len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1745
                       reason, action, unloaded_class_index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1746
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1747
  if (len >= buflen)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1748
    buf[buflen-1] = '\0';
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1749
  return buf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1750
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1751
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1752
juint Deoptimization::_deoptimization_hist
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1753
        [Deoptimization::Reason_LIMIT]
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1754
    [1 + Deoptimization::Action_LIMIT]
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1755
        [Deoptimization::BC_CASE_LIMIT]
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1756
  = {0};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1757
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1758
enum {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1759
  LSB_BITS = 8,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1760
  LSB_MASK = right_n_bits(LSB_BITS)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1761
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1762
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1763
void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1764
                                       Bytecodes::Code bc) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1765
  assert(reason >= 0 && reason < Reason_LIMIT, "oob");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1766
  assert(action >= 0 && action < Action_LIMIT, "oob");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1767
  _deoptimization_hist[Reason_none][0][0] += 1;  // total
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1768
  _deoptimization_hist[reason][0][0]      += 1;  // per-reason total
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1769
  juint* cases = _deoptimization_hist[reason][1+action];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1770
  juint* bc_counter_addr = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1771
  juint  bc_counter      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1772
  // Look for an unused counter, or an exact match to this BC.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1773
  if (bc != Bytecodes::_illegal) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1774
    for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
      juint* counter_addr = &cases[bc_case];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1776
      juint  counter = *counter_addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1777
      if ((counter == 0 && bc_counter_addr == NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1778
          || (Bytecodes::Code)(counter & LSB_MASK) == bc) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1779
        // this counter is either free or is already devoted to this BC
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1780
        bc_counter_addr = counter_addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
        bc_counter = counter | bc;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1783
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1784
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1785
  if (bc_counter_addr == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1786
    // Overflow, or no given bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1787
    bc_counter_addr = &cases[BC_CASE_LIMIT-1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1788
    bc_counter = (*bc_counter_addr & ~LSB_MASK);  // clear LSB
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1789
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1790
  *bc_counter_addr = bc_counter + (1 << LSB_BITS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1791
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1792
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
jint Deoptimization::total_deoptimization_count() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1794
  return _deoptimization_hist[Reason_none][0][0];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1795
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1796
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1797
jint Deoptimization::deoptimization_count(DeoptReason reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1798
  assert(reason >= 0 && reason < Reason_LIMIT, "oob");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
  return _deoptimization_hist[reason][0][0];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1800
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1801
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1802
void Deoptimization::print_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
  juint total = total_deoptimization_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
  juint account = total;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
  if (total != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1806
    ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1807
    if (xtty != NULL)  xtty->head("statistics type='deoptimization'");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1808
    tty->print_cr("Deoptimization traps recorded:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1809
    #define PRINT_STAT_LINE(name, r) \
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1810
      tty->print_cr("  %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
    PRINT_STAT_LINE("total", total);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1812
    // For each non-zero entry in the histogram, print the reason,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1813
    // the action, and (if specifically known) the type of bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1814
    for (int reason = 0; reason < Reason_LIMIT; reason++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1815
      for (int action = 0; action < Action_LIMIT; action++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1816
        juint* cases = _deoptimization_hist[reason][1+action];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1817
        for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1818
          juint counter = cases[bc_case];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1819
          if (counter != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1820
            char name[1*K];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1821
            Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1822
            if (bc_case == BC_CASE_LIMIT && (int)bc == 0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1823
              bc = Bytecodes::_illegal;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1824
            sprintf(name, "%s/%s/%s",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1825
                    trap_reason_name(reason),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1826
                    trap_action_name(action),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1827
                    Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1828
            juint r = counter >> LSB_BITS;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1829
            tty->print_cr("  %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1830
            account -= r;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1831
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1832
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1833
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1834
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1835
    if (account != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1836
      PRINT_STAT_LINE("unaccounted", account);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1837
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1838
    #undef PRINT_STAT_LINE
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1839
    if (xtty != NULL)  xtty->tail("statistics");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1840
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1841
}
6187
4fa7845f7c14 6976186: integrate Shark HotSpot changes
twisti
parents: 5547
diff changeset
  1842
#else // COMPILER2 || SHARK
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1843
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1844
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1845
// Stubs for C1 only system.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1846
bool Deoptimization::trap_state_is_recompiled(int trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1847
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1848
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1849
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1850
const char* Deoptimization::trap_reason_name(int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1851
  return "unknown";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1852
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1853
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1854
void Deoptimization::print_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1855
  // no output
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1856
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1857
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1858
void
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1859
Deoptimization::update_method_data_from_interpreter(methodDataHandle trap_mdo, int trap_bci, int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1860
  // no udpate
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1861
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1862
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1863
int Deoptimization::trap_state_has_reason(int trap_state, int reason) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1864
  return 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1865
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1866
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1867
void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1868
                                       Bytecodes::Code bc) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1869
  // no update
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1870
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1871
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1872
const char* Deoptimization::format_trap_state(char* buf, size_t buflen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1873
                                              int trap_state) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1874
  jio_snprintf(buf, buflen, "#%d", trap_state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1875
  return buf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1876
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1877
6187
4fa7845f7c14 6976186: integrate Shark HotSpot changes
twisti
parents: 5547
diff changeset
  1878
#endif // COMPILER2 || SHARK