view src/share/vm/graal/graalCodeInstaller.hpp @ 9126:bc26f978b0ce

HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly don't use the (wrong) cached value, but ask the runtime on each request. Fixes regression on xml.* benchmarks @ specjvm2008. The problem was: After the constructor of Object was deoptimized due to an assumption violation, it was recompiled again after some time. However, on recompilation, the value of hasFinalizeSubclass for the class was not updated and it was compiled again with a, now wrong, assumption, which then triggers deoptimization again. This was repeated until it hit the recompilation limit (defined by PerMethodRecompilationCutoff), and therefore only executed by the interpreter from now on, causing the performance regression.
author Bernhard Urban <bernhard.urban@jku.at>
date Mon, 15 Apr 2013 19:54:58 +0200
parents 2979aaac95af
children 0266549ff6e0
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/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#ifndef SHARE_VM_GRAAL_GRAAL_CODE_INSTALLER_HPP
#define SHARE_VM_GRAAL_GRAAL_CODE_INSTALLER_HPP

/*
 * This class handles the conversion from a InstalledCode to a CodeBlob or an nmethod.
 */
class CodeInstaller {
private:
  // these need to correspond to Marks.java
  enum MarkId {
    MARK_VERIFIED_ENTRY             = 1,
    MARK_UNVERIFIED_ENTRY           = 2,
    MARK_OSR_ENTRY                  = 3,
    MARK_EXCEPTION_HANDLER_ENTRY    = 4,
    MARK_DEOPT_HANDLER_ENTRY        = 5,
    MARK_INVOKEINTERFACE            = 6,
    MARK_INVOKEVIRTUAL              = 7,
    MARK_INVOKESTATIC               = 8,
    MARK_INVOKESPECIAL              = 9,
    MARK_INLINE_INVOKE              = 10,
    MARK_POLL_NEAR                  = 11,
    MARK_POLL_RETURN_NEAR           = 12,
    MARK_POLL_FAR                   = 13,
    MARK_POLL_RETURN_FAR            = 14,
    MARK_INVOKE_INVALID             = -1
  };

  Arena         _arena;

  oop           _comp_result;
  oop           _name;
  arrayOop      _sites;
  arrayOop      _exception_handlers;
  CodeOffsets   _offsets;

  arrayOop      _code;
  jint          _code_size;
  jint          _total_frame_size;
  jint          _custom_stack_area_offset;
  jint          _parameter_count;
  jint          _constants_size;

  MarkId        _next_call_type;
  address       _invoke_mark_pc;

  CodeSection*  _instructions;
  CodeSection*  _constants;

  OopRecorder*              _oop_recorder;
  DebugInformationRecorder* _debug_recorder;
  Dependencies*             _dependencies;
  ExceptionHandlerTable     _exception_handler_table;

public:

  // constructor used to create a method
  CodeInstaller(Handle& comp_result, methodHandle method, GraalEnv::CodeInstallResult& result, nmethod*& nm, Handle installed_code, Handle triggered_deoptimizations);

  // constructor used to create a stub
  CodeInstaller(Handle& target_method, BufferBlob*& blob, jlong& id);

  static address runtime_call_target_address(oop runtime_call);

private:
  // extract the fields of the CompilationResult
  void initialize_fields(oop target_method, methodHandle method);
  void initialize_assumptions(oop target_method);

  // perform data and call relocation on the CodeBuffer
  void initialize_buffer(CodeBuffer& buffer);

  void assumption_MethodContents(Handle assumption);
  void assumption_NoFinalizableSubclass(Handle assumption);
  void assumption_ConcreteSubtype(Handle assumption);
  void assumption_ConcreteMethod(Handle assumption);
  void assumption_CallSiteTargetValue(Handle assumption);

  void site_Safepoint(CodeBuffer& buffer, jint pc_offset, oop site);
  void site_Call(CodeBuffer& buffer, jint pc_offset, oop site);
  void site_DataPatch(CodeBuffer& buffer, jint pc_offset, oop site);
  void site_Mark(CodeBuffer& buffer, jint pc_offset, oop site);

  void record_scope(jint pc_offset, oop code_pos, GrowableArray<ScopeValue*>* objects);

  void process_exception_handlers();

};

#endif // SHARE_VM_GRAAL_GRAAL_CODE_INSTALLER_HPP