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annotate src/share/vm/compiler/disassembler.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 a5de0cc2f91c
children de6a9e811145 bdd155477289
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1 /*
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2 * Copyright (c) 2008, 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_DISASSEMBLER_HPP
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26 #define SHARE_VM_COMPILER_DISASSEMBLER_HPP
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27
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28 #include "asm/codeBuffer.hpp"
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29 #include "runtime/globals.hpp"
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30 #ifdef TARGET_OS_FAMILY_linux
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31 # include "os_linux.inline.hpp"
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32 #endif
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33 #ifdef TARGET_OS_FAMILY_solaris
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34 # include "os_solaris.inline.hpp"
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35 #endif
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36 #ifdef TARGET_OS_FAMILY_windows
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37 # include "os_windows.inline.hpp"
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38 #endif
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39 #ifdef TARGET_OS_FAMILY_bsd
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40 # include "os_bsd.inline.hpp"
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41 #endif
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42
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43 class decode_env;
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44
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45 // The disassembler prints out assembly code annotated
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46 // with Java specific information.
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47
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48 class Disassembler {
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49 friend class decode_env;
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50 private:
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51 // this is the type of the dll entry point:
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52 typedef void* (*decode_func_virtual)(uintptr_t start_va, uintptr_t end_va,
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53 unsigned char* buffer, uintptr_t length,
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54 void* (*event_callback)(void*, const char*, void*),
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55 void* event_stream,
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56 int (*printf_callback)(void*, const char*, ...),
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57 void* printf_stream,
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58 const char* options,
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59 int newline);
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60 // this is the type of the dll entry point for old version:
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61 typedef void* (*decode_func)(void* start_va, void* end_va,
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62 void* (*event_callback)(void*, const char*, void*),
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63 void* event_stream,
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64 int (*printf_callback)(void*, const char*, ...),
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65 void* printf_stream,
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66 const char* options);
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67 // points to the library.
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68 static void* _library;
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69 // bailout
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70 static bool _tried_to_load_library;
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71 // points to the decode function.
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72 static decode_func_virtual _decode_instructions_virtual;
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73 static decode_func _decode_instructions;
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74 // tries to load library and return whether it succedded.
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75 static bool load_library();
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76
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77 // Machine dependent stuff
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78 #ifdef TARGET_ARCH_x86
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79 # include "disassembler_x86.hpp"
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80 #endif
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81 #ifdef TARGET_ARCH_sparc
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82 # include "disassembler_sparc.hpp"
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83 #endif
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84 #ifdef TARGET_ARCH_zero
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85 # include "disassembler_zero.hpp"
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86 #endif
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87 #ifdef TARGET_ARCH_arm
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88 # include "disassembler_arm.hpp"
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89 #endif
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90 #ifdef TARGET_ARCH_ppc
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91 # include "disassembler_ppc.hpp"
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92 #endif
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95 public:
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96 static bool can_decode() {
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97 return (_decode_instructions_virtual != NULL) ||
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98 (_decode_instructions != NULL) ||
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99 load_library();
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100 }
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101 static void decode(CodeBlob *cb, outputStream* st = NULL);
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102 static void decode(nmethod* nm, outputStream* st = NULL);
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103 static void decode(address begin, address end, outputStream* st = NULL, CodeStrings c = CodeStrings());
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104 };
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105
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106 #endif // SHARE_VM_COMPILER_DISASSEMBLER_HPP