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annotate src/share/vm/compiler/abstractCompiler.hpp @ 9126:bc26f978b0ce

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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 64f41765b3d2
children 359f7e70ae7f
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1 /*
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
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26 #define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
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27
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28 #include "ci/compilerInterface.hpp"
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29
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30 typedef void (*initializer)(void);
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32 #ifdef GRAAL
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33 class CompilerStatistics {
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34 public:
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35 elapsedTimer _t_osr_compilation;
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36 elapsedTimer _t_standard_compilation;
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37 int _sum_osr_bytes_compiled;
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38 int _sum_standard_bytes_compiled;
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39 CompilerStatistics() : _sum_osr_bytes_compiled(0), _sum_standard_bytes_compiled(0) {}
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40 };
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41 #endif
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43 class AbstractCompiler : public CHeapObj<mtCompiler> {
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44 private:
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45 bool _is_initialized; // Mark whether compiler object is initialized
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46
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47 protected:
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48 // Used for tracking global state of compiler runtime initialization
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49 enum { uninitialized, initializing, initialized };
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50
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51 // The (closed set) of concrete compiler classes. Using an tag like this
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52 // avoids a confusing use of macros around the definition of the
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53 // 'is_<compiler type>' methods.
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54 enum Type { c1, c2, shark, graal };
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55
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56 // This method will call the initialization method "f" once (per compiler class/subclass)
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57 // and do so without holding any locks
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58 void initialize_runtimes(initializer f, volatile int* state);
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59
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60 private:
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61 Type _type;
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63 #ifdef GRAAL
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64 CompilerStatistics _stats;
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65 #endif
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67 public:
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68 AbstractCompiler(Type type) : _is_initialized(false), _type(type) {}
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70 // Name of this compiler
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71 virtual const char* name() = 0;
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72
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73 // Should a native wrapper be generated by the runtime. This method
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74 // does *not* answer the question "can this compiler generate code for
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75 // a native method".
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76 virtual bool supports_native() { return true; }
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78 virtual bool supports_osr () { return true; }
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79 virtual bool can_compile_method(methodHandle method) { return true; }
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80 bool is_c1 () { return _type == c1; }
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81 bool is_c2 () { return _type == c2; }
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82 bool is_shark() { return _type == shark; }
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83 bool is_graal() { return _type == graal; }
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84
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85 void mark_initialized() { _is_initialized = true; }
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86 bool is_initialized() { return _is_initialized; }
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87
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88 virtual void initialize() = 0;
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89
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90 // Compilation entry point for methods
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91 virtual void compile_method(ciEnv* env,
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92 ciMethod* target,
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93 int entry_bci) {
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94 ShouldNotReachHere();
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95 }
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96
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97
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98 // Print compilation timers and statistics
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99 virtual void print_timers() {
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100 ShouldNotReachHere();
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101 }
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102
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103 #ifdef GRAAL
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104 CompilerStatistics* stats() { return &_stats; }
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105 #endif
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106 };
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108 #endif // SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP