31 #include "memory/virtualspace.hpp"
32 #include "oops/oop.hpp"
33 #include "utilities/macros.hpp"
34
35 class ArchiveBuilder;
36 class ArchiveHeapInfo;
37 class FileMapInfo;
38 class Method;
39 class outputStream;
40 class SerializeClosure;
41 class StaticArchiveBuilder;
42
43 template<class E> class Array;
44
45 enum MapArchiveResult {
46 MAP_ARCHIVE_SUCCESS,
47 MAP_ARCHIVE_MMAP_FAILURE,
48 MAP_ARCHIVE_OTHER_FAILURE
49 };
50
51 // Class Data Sharing Support
52 class MetaspaceShared : AllStatic {
53 static ReservedSpace _symbol_rs; // used only during -Xshare:dump
54 static VirtualSpace _symbol_vs; // used only during -Xshare:dump
55 static bool _archive_loading_failed;
56 static bool _remapped_readwrite;
57 static void* _shared_metaspace_static_top;
58 static intx _relocation_delta;
59 static char* _requested_base_address;
60 static bool _use_optimized_module_handling;
61 static Array<Method*>* _archived_method_handle_intrinsics;
62
63 public:
64 enum {
65 // core archive spaces
66 rw = 0, // read-write shared space
67 ro = 1, // read-only shared space
68 bm = 2, // relocation bitmaps (freed after file mapping is finished)
69 hp = 3, // heap region
70 num_core_region = 2, // rw and ro
71 n_regions = 4 // total number of regions
72 };
73
74 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
75 #ifdef _LP64
76 static void adjust_heap_sizes_for_dumping() NOT_CDS_JAVA_HEAP_RETURN;
77 #endif
78
79 private:
80 static void exercise_runtime_cds_code(TRAPS) NOT_CDS_RETURN;
81 static void preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) NOT_CDS_RETURN;
82 static void preload_classes(TRAPS) NOT_CDS_RETURN;
83
84 public:
85 static Symbol* symbol_rs_base() {
86 return (Symbol*)_symbol_rs.base();
87 }
88
89 static void initialize_for_static_dump() NOT_CDS_RETURN;
90 static void initialize_runtime_shared_and_meta_spaces() NOT_CDS_RETURN;
91 static void post_initialize(TRAPS) NOT_CDS_RETURN;
92
93 static void print_on(outputStream* st);
94
95 static void set_archive_loading_failed() {
96 _archive_loading_failed = true;
97 }
98
99 static void initialize_shared_spaces() NOT_CDS_RETURN;
100
101 // Return true if given address is in the shared metaspace regions (i.e., excluding the
102 // mapped heap region.)
103 static bool is_in_shared_metaspace(const void* p) {
104 return MetaspaceObj::is_shared((const MetaspaceObj*)p);
105 }
106
107 static void set_shared_metaspace_range(void* base, void *static_top, void* top) NOT_CDS_RETURN;
108
109 static bool is_shared_dynamic(void* p) NOT_CDS_RETURN_(false);
110 static bool is_shared_static(void* p) NOT_CDS_RETURN_(false);
111
112 static void unrecoverable_loading_error(const char* message = nullptr);
113 static void unrecoverable_writing_error(const char* message = nullptr);
114 static void writing_error(const char* message = nullptr);
115
116 static void make_method_handle_intrinsics_shareable() NOT_CDS_RETURN;
117 static void write_method_handle_intrinsics() NOT_CDS_RETURN;
118 static Array<Method*>* archived_method_handle_intrinsics() { return _archived_method_handle_intrinsics; }
119 static void early_serialize(SerializeClosure* sc) NOT_CDS_RETURN;
120 static void serialize(SerializeClosure* sc) NOT_CDS_RETURN;
121
122 // JVM/TI RedefineClasses() support:
123 // Remap the shared readonly space to shared readwrite, private if
124 // sharing is enabled. Simply returns true if sharing is not enabled
125 // or if the remapping has already been done by a prior call.
126 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
127 static bool remapped_readwrite() {
128 CDS_ONLY(return _remapped_readwrite);
129 NOT_CDS(return false);
130 }
131
160 // 0x800000000 (unless it was set by -XX:SharedBaseAddress during -Xshare:dump).
161 static char* requested_base_address() {
162 return _requested_base_address;
163 }
164
165 // Non-zero if the archive(s) need to be mapped a non-default location due to ASLR.
166 static intx relocation_delta() { return _relocation_delta; }
167
168 static bool use_windows_memory_mapping() {
169 const bool is_windows = (NOT_WINDOWS(false) WINDOWS_ONLY(true));
170 //const bool is_windows = true; // enable this to allow testing the windows mmap semantics on Linux, etc.
171 return is_windows;
172 }
173
174 // Can we skip some expensive operations related to modules?
175 static bool use_optimized_module_handling() { return NOT_CDS(false) CDS_ONLY(_use_optimized_module_handling); }
176 static void disable_optimized_module_handling() { _use_optimized_module_handling = false; }
177
178 private:
179 static void read_extra_data(JavaThread* current, const char* filename) NOT_CDS_RETURN;
180 static bool write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info);
181 static FileMapInfo* open_static_archive();
182 static FileMapInfo* open_dynamic_archive();
183 // use_requested_addr: If true (default), attempt to map at the address the
184 static MapArchiveResult map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
185 bool use_requested_addr);
186 static char* reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
187 FileMapInfo* dynamic_mapinfo,
188 bool use_archive_base_addr,
189 ReservedSpace& total_space_rs,
190 ReservedSpace& archive_space_rs,
191 ReservedSpace& class_space_rs);
192 static void release_reserved_spaces(ReservedSpace& total_space_rs,
193 ReservedSpace& archive_space_rs,
194 ReservedSpace& class_space_rs);
195 static MapArchiveResult map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs);
196 static void unmap_archive(FileMapInfo* mapinfo);
197 static void get_default_classlist(char* default_classlist, const size_t buf_size);
198 };
199 #endif // SHARE_CDS_METASPACESHARED_HPP
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31 #include "memory/virtualspace.hpp"
32 #include "oops/oop.hpp"
33 #include "utilities/macros.hpp"
34
35 class ArchiveBuilder;
36 class ArchiveHeapInfo;
37 class FileMapInfo;
38 class Method;
39 class outputStream;
40 class SerializeClosure;
41 class StaticArchiveBuilder;
42
43 template<class E> class Array;
44
45 enum MapArchiveResult {
46 MAP_ARCHIVE_SUCCESS,
47 MAP_ARCHIVE_MMAP_FAILURE,
48 MAP_ARCHIVE_OTHER_FAILURE
49 };
50
51 class StaticArchiveBuilder;
52
53 // Class Data Sharing Support
54 class MetaspaceShared : AllStatic {
55 static ReservedSpace _symbol_rs; // used only during -Xshare:dump
56 static VirtualSpace _symbol_vs; // used only during -Xshare:dump
57 static bool _archive_loading_failed;
58 static bool _remapped_readwrite;
59 static void* _shared_metaspace_static_top;
60 static intx _relocation_delta;
61 static char* _requested_base_address;
62 static bool _use_optimized_module_handling;
63 static Array<Method*>* _archived_method_handle_intrinsics;
64 static int volatile _preimage_static_archive_dumped;
65
66 public:
67 enum {
68 // core archive spaces
69 rw = 0, // read-write shared space
70 ro = 1, // read-only shared space
71 bm = 2, // relocation bitmaps (freed after file mapping is finished)
72 hp = 3, // heap region
73 cc = 4, // cached code
74 num_core_region = 2, // rw and ro
75 n_regions = 5 // total number of regions
76 };
77
78 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
79 #ifdef _LP64
80 static void adjust_heap_sizes_for_dumping() NOT_CDS_JAVA_HEAP_RETURN;
81 #endif
82
83 private:
84 static void exercise_runtime_cds_code(TRAPS) NOT_CDS_RETURN;
85 static void preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) NOT_CDS_RETURN;
86 static void preload_classes(TRAPS) NOT_CDS_RETURN;
87
88 public:
89 static Symbol* symbol_rs_base() {
90 return (Symbol*)_symbol_rs.base();
91 }
92
93 static void initialize_for_static_dump() NOT_CDS_RETURN;
94 static void open_static_archive() NOT_CDS_RETURN;
95 static void initialize_runtime_shared_and_meta_spaces() NOT_CDS_RETURN;
96 static void post_initialize(TRAPS) NOT_CDS_RETURN;
97
98 static void print_on(outputStream* st);
99
100 static void set_archive_loading_failed() {
101 _archive_loading_failed = true;
102 }
103
104 static void initialize_shared_spaces() NOT_CDS_RETURN;
105
106 // Return true if given address is in the shared metaspace regions (i.e., excluding the
107 // mapped heap region.)
108 static bool is_in_shared_metaspace(const void* p) {
109 return MetaspaceObj::is_shared((const MetaspaceObj*)p);
110 }
111
112 static void set_shared_metaspace_range(void* base, void *static_top, void* top) NOT_CDS_RETURN;
113
114 static bool is_shared_dynamic(void* p) NOT_CDS_RETURN_(false);
115 static bool is_shared_static(void* p) NOT_CDS_RETURN_(false);
116
117 static bool is_recording_preimage_static_archive() NOT_CDS_RETURN_(false);
118
119 static void unrecoverable_loading_error(const char* message = nullptr);
120 static void unrecoverable_writing_error(const char* message = nullptr);
121 static void writing_error(const char* message = nullptr);
122
123 static void make_method_handle_intrinsics_shareable() NOT_CDS_RETURN;
124 static void write_method_handle_intrinsics() NOT_CDS_RETURN;
125 static Array<Method*>* archived_method_handle_intrinsics() { return _archived_method_handle_intrinsics; }
126 static void early_serialize(SerializeClosure* sc) NOT_CDS_RETURN;
127 static void serialize(SerializeClosure* sc) NOT_CDS_RETURN;
128
129 // JVM/TI RedefineClasses() support:
130 // Remap the shared readonly space to shared readwrite, private if
131 // sharing is enabled. Simply returns true if sharing is not enabled
132 // or if the remapping has already been done by a prior call.
133 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
134 static bool remapped_readwrite() {
135 CDS_ONLY(return _remapped_readwrite);
136 NOT_CDS(return false);
137 }
138
167 // 0x800000000 (unless it was set by -XX:SharedBaseAddress during -Xshare:dump).
168 static char* requested_base_address() {
169 return _requested_base_address;
170 }
171
172 // Non-zero if the archive(s) need to be mapped a non-default location due to ASLR.
173 static intx relocation_delta() { return _relocation_delta; }
174
175 static bool use_windows_memory_mapping() {
176 const bool is_windows = (NOT_WINDOWS(false) WINDOWS_ONLY(true));
177 //const bool is_windows = true; // enable this to allow testing the windows mmap semantics on Linux, etc.
178 return is_windows;
179 }
180
181 // Can we skip some expensive operations related to modules?
182 static bool use_optimized_module_handling() { return NOT_CDS(false) CDS_ONLY(_use_optimized_module_handling); }
183 static void disable_optimized_module_handling() { _use_optimized_module_handling = false; }
184
185 private:
186 static void read_extra_data(JavaThread* current, const char* filename) NOT_CDS_RETURN;
187 static void fork_and_dump_final_static_archive(TRAPS);
188 static void fork_and_dump_final_static_archive_experimental_leyden_workflow(TRAPS);
189 static bool write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info);
190 static FileMapInfo* open_dynamic_archive();
191 // use_requested_addr: If true (default), attempt to map at the address the
192 static MapArchiveResult map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
193 bool use_requested_addr);
194 static char* reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
195 FileMapInfo* dynamic_mapinfo,
196 bool use_archive_base_addr,
197 ReservedSpace& total_space_rs,
198 ReservedSpace& archive_space_rs,
199 ReservedSpace& class_space_rs);
200 static void release_reserved_spaces(ReservedSpace& total_space_rs,
201 ReservedSpace& archive_space_rs,
202 ReservedSpace& class_space_rs);
203 static MapArchiveResult map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs);
204 static void unmap_archive(FileMapInfo* mapinfo);
205 static void get_default_classlist(char* default_classlist, const size_t buf_size);
206 };
207 #endif // SHARE_CDS_METASPACESHARED_HPP
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