24
25 #ifndef SHARE_MEMORY_FILEMAP_HPP
26 #define SHARE_MEMORY_FILEMAP_HPP
27
28 #include "classfile/classLoader.hpp"
29 #include "include/cds.h"
30 #include "memory/metaspaceShared.hpp"
31 #include "memory/metaspace.hpp"
32 #include "oops/compressedOops.hpp"
33 #include "utilities/align.hpp"
34
35 // Layout of the file:
36 // header: dump of archive instance plus versioning info, datestamp, etc.
37 // [magic # = 0xF00BABA2]
38 // ... padding to align on page-boundary
39 // read-write space
40 // read-only space
41 // misc data (block offset table, string table, symbols, dictionary, etc.)
42 // tag(666)
43
44 static const int JVM_IDENT_MAX = 256;
45
46 class SharedClassPathEntry {
47 enum {
48 modules_image_entry,
49 jar_entry,
50 signed_jar_entry,
51 dir_entry,
52 unknown_entry
53 };
54 protected:
55 u1 _type;
56 bool _from_class_path_attr;
57 time_t _timestamp; // jar timestamp, 0 if is directory, modules image or other
58 long _filesize; // jar/jimage file size, -1 if is directory, -2 if other
59 Array<char>* _name;
60 Array<u1>* _manifest;
61
62 public:
63 void init(bool is_modules_image, ClassPathEntry* cpe, TRAPS);
64 void metaspace_pointers_do(MetaspaceClosure* it);
65 bool validate(bool is_class_path = true);
121
122 struct FileMapHeader : public CDSFileMapHeaderBase {
123 size_t _header_size;
124 size_t _alignment; // how shared archive should be aligned
125 int _obj_alignment; // value of ObjectAlignmentInBytes
126 address _narrow_oop_base; // compressed oop encoding base
127 int _narrow_oop_shift; // compressed oop encoding shift
128 bool _compact_strings; // value of CompactStrings
129 uintx _max_heap_size; // java max heap size during dumping
130 CompressedOops::Mode _narrow_oop_mode; // compressed oop encoding mode
131 int _narrow_klass_shift; // save narrow klass base and shift
132 address _narrow_klass_base;
133 char* _misc_data_patching_start;
134 char* _read_only_tables_start;
135 address _cds_i2i_entry_code_buffers;
136 size_t _cds_i2i_entry_code_buffers_size;
137 size_t _core_spaces_size; // number of bytes allocated by the core spaces
138 // (mc, md, ro, rw and od).
139 MemRegion _heap_reserved; // reserved region for the entire heap at dump time.
140 bool _base_archive_is_default; // indicates if the base archive is the system default one
141
142 // The following fields are all sanity checks for whether this archive
143 // will function correctly with this JVM and the bootclasspath it's
144 // invoked with.
145 char _jvm_ident[JVM_IDENT_MAX]; // identifier for jvm
146
147 // size of the base archive name including NULL terminator
148 int _base_archive_name_size;
149
150 // The _paths_misc_info is a variable-size structure that records "miscellaneous"
151 // information during dumping. It is generated and validated by the
152 // SharedPathsMiscInfo class. See SharedPathsMiscInfo.hpp for
153 // detailed description.
154 //
155 // The _paths_misc_info data is stored as a byte array in the archive file header,
156 // immediately after the _header field. This information is used only when
157 // checking the validity of the archive and is deallocated after the archive is loaded.
158 //
159 // Note that the _paths_misc_info does NOT include information for JAR files
160 // that existed during dump time. Their information is stored in _shared_path_table.
161 int _paths_misc_info_size;
162
163 // The following is a table of all the class path entries that were used
164 // during dumping. At run time, we require these files to exist and have the same
165 // size/modification time, or else the archive will refuse to load.
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24
25 #ifndef SHARE_MEMORY_FILEMAP_HPP
26 #define SHARE_MEMORY_FILEMAP_HPP
27
28 #include "classfile/classLoader.hpp"
29 #include "include/cds.h"
30 #include "memory/metaspaceShared.hpp"
31 #include "memory/metaspace.hpp"
32 #include "oops/compressedOops.hpp"
33 #include "utilities/align.hpp"
34
35 // Layout of the file:
36 // header: dump of archive instance plus versioning info, datestamp, etc.
37 // [magic # = 0xF00BABA2]
38 // ... padding to align on page-boundary
39 // read-write space
40 // read-only space
41 // misc data (block offset table, string table, symbols, dictionary, etc.)
42 // tag(666)
43
44 class SharedClassPathEntry {
45 enum {
46 modules_image_entry,
47 jar_entry,
48 signed_jar_entry,
49 dir_entry,
50 unknown_entry
51 };
52 protected:
53 u1 _type;
54 bool _from_class_path_attr;
55 time_t _timestamp; // jar timestamp, 0 if is directory, modules image or other
56 long _filesize; // jar/jimage file size, -1 if is directory, -2 if other
57 Array<char>* _name;
58 Array<u1>* _manifest;
59
60 public:
61 void init(bool is_modules_image, ClassPathEntry* cpe, TRAPS);
62 void metaspace_pointers_do(MetaspaceClosure* it);
63 bool validate(bool is_class_path = true);
119
120 struct FileMapHeader : public CDSFileMapHeaderBase {
121 size_t _header_size;
122 size_t _alignment; // how shared archive should be aligned
123 int _obj_alignment; // value of ObjectAlignmentInBytes
124 address _narrow_oop_base; // compressed oop encoding base
125 int _narrow_oop_shift; // compressed oop encoding shift
126 bool _compact_strings; // value of CompactStrings
127 uintx _max_heap_size; // java max heap size during dumping
128 CompressedOops::Mode _narrow_oop_mode; // compressed oop encoding mode
129 int _narrow_klass_shift; // save narrow klass base and shift
130 address _narrow_klass_base;
131 char* _misc_data_patching_start;
132 char* _read_only_tables_start;
133 address _cds_i2i_entry_code_buffers;
134 size_t _cds_i2i_entry_code_buffers_size;
135 size_t _core_spaces_size; // number of bytes allocated by the core spaces
136 // (mc, md, ro, rw and od).
137 MemRegion _heap_reserved; // reserved region for the entire heap at dump time.
138 bool _base_archive_is_default; // indicates if the base archive is the system default one
139
140 // size of the base archive name including NULL terminator
141 int _base_archive_name_size;
142
143 // The _paths_misc_info is a variable-size structure that records "miscellaneous"
144 // information during dumping. It is generated and validated by the
145 // SharedPathsMiscInfo class. See SharedPathsMiscInfo.hpp for
146 // detailed description.
147 //
148 // The _paths_misc_info data is stored as a byte array in the archive file header,
149 // immediately after the _header field. This information is used only when
150 // checking the validity of the archive and is deallocated after the archive is loaded.
151 //
152 // Note that the _paths_misc_info does NOT include information for JAR files
153 // that existed during dump time. Their information is stored in _shared_path_table.
154 int _paths_misc_info_size;
155
156 // The following is a table of all the class path entries that were used
157 // during dumping. At run time, we require these files to exist and have the same
158 // size/modification time, or else the archive will refuse to load.
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