view src/share/vm/compiler/compilerOracle.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 1e76463170b3
children 14b356bbca27
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/*
 * Copyright (c) 1998, 2012, 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_COMPILER_COMPILERORACLE_HPP
#define SHARE_VM_COMPILER_COMPILERORACLE_HPP

#include "memory/allocation.hpp"
#include "oops/oopsHierarchy.hpp"

// CompilerOracle is an interface for turning on and off compilation
// for some methods

class CompilerOracle : AllStatic {
 private:
  static bool _quiet;

 public:

  // True if the command file has been specified or is implicit
  static bool has_command_file();

  // Reads from file and adds to lists
  static void parse_from_file();

  // Tells whether we to exclude compilation of method
  static bool should_exclude(methodHandle method, bool& quietly);

  // Tells whether we want to inline this method
  static bool should_inline(methodHandle method);

  // Tells whether we want to disallow inlining of this method
  static bool should_not_inline(methodHandle method);

  // Tells whether we should print the assembly for this method
  static bool should_print(methodHandle method);

  // Tells whether we should log the compilation data for this method
  static bool should_log(methodHandle method);

  // Tells whether to break when compiling method
  static bool should_break_at(methodHandle method);

  // Check to see if this method has option set for it
  static bool has_option_string(methodHandle method, const char * option);

  // Reads from string instead of file
  static void parse_from_string(const char* command_string, void (*parser)(char*));

  static void parse_from_line(char* line);
  static void parse_compile_only(char * line);

  // For updating the oracle file
  static void append_comment_to_file(const char* message);
  static void append_exclude_to_file(methodHandle method);
};

#endif // SHARE_VM_COMPILER_COMPILERORACLE_HPP