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annotate src/share/vm/memory/metaspaceShared.hpp @ 20586:03e6d34be1f5

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8038268: VM Crashes in MetaspaceShared::generate_vtable_methods while creating CDS archive with limiting SharedMiscCodeSize Summary: estimate the minimum required size for the misc code region and check if the specified misc code region size meets the minimum size requirement Reviewed-by: jiangli, dholmes
author ccheung
date Thu, 30 Oct 2014 13:38:00 -0700
parents b23a19cd0536
children 4cb90023bf2b
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1 /*
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2 * Copyright (c) 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 #ifndef SHARE_VM_MEMORY_METASPACE_SHARED_HPP
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25 #define SHARE_VM_MEMORY_METASPACE_SHARED_HPP
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26
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27 #include "memory/allocation.hpp"
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28 #include "memory/memRegion.hpp"
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29 #include "runtime/virtualspace.hpp"
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30 #include "utilities/exceptions.hpp"
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31 #include "utilities/macros.hpp"
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32
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33 #define LargeSharedArchiveSize (300*M)
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34 #define HugeSharedArchiveSize (800*M)
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35 #define ReadOnlyRegionPercentage 0.4
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36 #define ReadWriteRegionPercentage 0.55
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37 #define MiscDataRegionPercentage 0.03
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38 #define MiscCodeRegionPercentage 0.02
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39 #define LargeThresholdClassCount 5000
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40 #define HugeThresholdClassCount 40000
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41
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42 #define SET_ESTIMATED_SIZE(type, region) \
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43 Shared ##region## Size = FLAG_IS_DEFAULT(Shared ##region## Size) ? \
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44 (uintx)(type ## SharedArchiveSize * region ## RegionPercentage) : Shared ## region ## Size
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45
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46 class FileMapInfo;
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47
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48 // Class Data Sharing Support
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49 class MetaspaceShared : AllStatic {
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50
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51 // CDS support
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52 static ReservedSpace* _shared_rs;
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53 static int _max_alignment;
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54 static bool _link_classes_made_progress;
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55 static bool _check_classes_made_progress;
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56 static bool _has_error_classes;
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57 static bool _archive_loading_failed;
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58 public:
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59 enum {
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60 vtbl_list_size = 17, // number of entries in the shared space vtable list.
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61 num_virtuals = 200, // maximum number of virtual functions
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62 // If virtual functions are added to Metadata,
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63 // this number needs to be increased. Also,
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64 // SharedMiscCodeSize will need to be increased.
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65 // The following 2 sizes were based on
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66 // MetaspaceShared::generate_vtable_methods()
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67 vtbl_method_size = 16, // conservative size of the mov1 and jmp instructions
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68 // for the x64 platform
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69 vtbl_common_code_size = (1*K) // conservative size of the "common_code" for the x64 platform
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70 };
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71
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72 enum {
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73 ro = 0, // read-only shared space in the heap
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74 rw = 1, // read-write shared space in the heap
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75 md = 2, // miscellaneous data for initializing tables, etc.
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76 mc = 3, // miscellaneous code - vtable replacement.
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77 n_regions = 4
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78 };
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79
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80 // Accessor functions to save shared space created for metadata, which has
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81 // extra space allocated at the end for miscellaneous data and code.
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82 static void set_max_alignment(int alignment) {
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83 CDS_ONLY(_max_alignment = alignment);
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84 }
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85
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86 static int max_alignment() {
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87 CDS_ONLY(return _max_alignment);
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88 NOT_CDS(return 0);
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89 }
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90
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91 static void prepare_for_dumping() NOT_CDS_RETURN;
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92 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
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93 static int preload_and_dump(const char * class_list_path,
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94 GrowableArray<Klass*>* class_promote_order,
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95 TRAPS) NOT_CDS_RETURN;
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96
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97 static ReservedSpace* shared_rs() {
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98 CDS_ONLY(return _shared_rs);
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99 NOT_CDS(return NULL);
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100 }
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101
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102 static void set_shared_rs(ReservedSpace* rs) {
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103 CDS_ONLY(_shared_rs = rs;)
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104 }
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105
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106 static void set_archive_loading_failed() {
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107 _archive_loading_failed = true;
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108 }
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109 static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false);
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110 static void initialize_shared_spaces() NOT_CDS_RETURN;
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111
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112 // Return true if given address is in the mapped shared space.
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113 static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false);
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114
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115 static void generate_vtable_methods(void** vtbl_list,
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116 void** vtable,
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117 char** md_top, char* md_end,
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118 char** mc_top, char* mc_end);
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119 static void serialize(SerializeClosure* sc);
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120
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121 // JVM/TI RedefineClasses() support:
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122 // Remap the shared readonly space to shared readwrite, private if
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123 // sharing is enabled. Simply returns true if sharing is not enabled
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124 // or if the remapping has already been done by a prior call.
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125 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
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126
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127 static void print_shared_spaces();
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128
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129 static bool try_link_class(InstanceKlass* ik, TRAPS);
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130 static void link_one_shared_class(Klass* obj, TRAPS);
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131 static void check_one_shared_class(Klass* obj);
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132 static void link_and_cleanup_shared_classes(TRAPS);
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133
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134 static int count_class(const char* classlist_file);
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135 static void estimate_regions_size() NOT_CDS_RETURN;
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136 };
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137 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP