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comparison src/share/vm/memory/filemap.hpp @ 20527:8cb56c8cb30d

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Merge
author jiangli
date Mon, 15 Sep 2014 16:39:00 -0400
parents 6e0cb14ce59b ca6d25be853b
children
comparison
equal deleted inserted replaced
20411:fe1f65b0a2d8 20527:8cb56c8cb30d
59 _current_version = 2 59 _current_version = 2
60 }; 60 };
61 61
62 bool _file_open; 62 bool _file_open;
63 int _fd; 63 int _fd;
64 long _file_offset; 64 size_t _file_offset;
65 65
66 private: 66 private:
67 static SharedClassPathEntry* _classpath_entry_table; 67 static SharedClassPathEntry* _classpath_entry_table;
68 static int _classpath_entry_table_size; 68 static int _classpath_entry_table_size;
69 static size_t _classpath_entry_size; 69 static size_t _classpath_entry_size;
85 char* data() { 85 char* data() {
86 return ((char*)this) + sizeof(FileMapHeaderBase); 86 return ((char*)this) + sizeof(FileMapHeaderBase);
87 } 87 }
88 88
89 int _magic; // identify file type. 89 int _magic; // identify file type.
90 int _crc; // header crc checksum.
90 int _version; // (from enum, above.) 91 int _version; // (from enum, above.)
91 size_t _alignment; // how shared archive should be aligned 92 size_t _alignment; // how shared archive should be aligned
92 int _obj_alignment; // value of ObjectAlignmentInBytes 93 int _obj_alignment; // value of ObjectAlignmentInBytes
93 94
94 struct space_info { 95 struct space_info {
95 int _file_offset; // sizeof(this) rounded to vm page size 96 int _crc; // crc checksum of the current space
97 size_t _file_offset; // sizeof(this) rounded to vm page size
96 char* _base; // copy-on-write base address 98 char* _base; // copy-on-write base address
97 size_t _capacity; // for validity checking 99 size_t _capacity; // for validity checking
98 size_t _used; // for setting space top on read 100 size_t _used; // for setting space top on read
99 bool _read_only; // read only space? 101 bool _read_only; // read only space?
100 bool _allow_exec; // executable code in space? 102 bool _allow_exec; // executable code in space?
133 size_t _classpath_entry_size; 135 size_t _classpath_entry_size;
134 SharedClassPathEntry* _classpath_entry_table; 136 SharedClassPathEntry* _classpath_entry_table;
135 137
136 virtual bool validate(); 138 virtual bool validate();
137 virtual void populate(FileMapInfo* info, size_t alignment); 139 virtual void populate(FileMapInfo* info, size_t alignment);
140 int compute_crc();
138 }; 141 };
139 142
140 FileMapHeader * _header; 143 FileMapHeader * _header;
141 144
142 const char* _full_path; 145 const char* _full_path;
151 public: 154 public:
152 FileMapInfo(); 155 FileMapInfo();
153 ~FileMapInfo(); 156 ~FileMapInfo();
154 157
155 static int current_version() { return _current_version; } 158 static int current_version() { return _current_version; }
159 int compute_header_crc();
160 void set_header_crc(int crc) { _header->_crc = crc; }
156 void populate_header(size_t alignment); 161 void populate_header(size_t alignment);
157 bool validate_header(); 162 bool validate_header();
158 void invalidate(); 163 void invalidate();
159 int version() { return _header->_version; } 164 int version() { return _header->_version; }
160 size_t alignment() { return _header->_alignment; } 165 size_t alignment() { return _header->_alignment; }
179 size_t capacity, bool read_only, bool allow_exec); 184 size_t capacity, bool read_only, bool allow_exec);
180 void write_bytes(const void* buffer, int count); 185 void write_bytes(const void* buffer, int count);
181 void write_bytes_aligned(const void* buffer, int count); 186 void write_bytes_aligned(const void* buffer, int count);
182 char* map_region(int i); 187 char* map_region(int i);
183 void unmap_region(int i); 188 void unmap_region(int i);
189 bool verify_region_checksum(int i);
184 void close(); 190 void close();
185 bool is_open() { return _file_open; } 191 bool is_open() { return _file_open; }
186 ReservedSpace reserve_shared_memory(); 192 ReservedSpace reserve_shared_memory();
187 193
188 // JVM/TI RedefineClasses() support: 194 // JVM/TI RedefineClasses() support: