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 ac = 4, // aot code
71 num_core_region = 2, // rw and ro
72 n_regions = 5 // total number of regions
73 };
74
75 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
76 #ifdef _LP64
77 static void adjust_heap_sizes_for_dumping() NOT_CDS_JAVA_HEAP_RETURN;
78 #endif
79
80 private:
81 static void exercise_runtime_cds_code(TRAPS) NOT_CDS_RETURN;
82 static void preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) NOT_CDS_RETURN;
83 static void preload_classes(TRAPS) NOT_CDS_RETURN;
84
85 public:
86 static Symbol* symbol_rs_base() {
87 return (Symbol*)_symbol_rs.base();
88 }
89
90 static void initialize_for_static_dump() NOT_CDS_RETURN;
91 static void initialize_runtime_shared_and_meta_spaces() NOT_CDS_RETURN;
92 static void post_initialize(TRAPS) NOT_CDS_RETURN;
93
94 static void print_on(outputStream* st);
95
96 static void set_archive_loading_failed() {
97 _archive_loading_failed = true;
98 }
99
100 static void initialize_shared_spaces() NOT_CDS_RETURN;
101
102 // Return true if given address is in the shared metaspace regions (i.e., excluding the
103 // mapped heap region.)
104 static bool is_in_shared_metaspace(const void* p) {
105 return MetaspaceObj::is_shared((const MetaspaceObj*)p);
106 }
107
108 static void set_shared_metaspace_range(void* base, void *static_top, void* top) NOT_CDS_RETURN;
109
110 static bool is_shared_dynamic(void* p) NOT_CDS_RETURN_(false);
111 static bool is_shared_static(void* p) NOT_CDS_RETURN_(false);
112
113 static void unrecoverable_loading_error(const char* message = nullptr);
114 static void unrecoverable_writing_error(const char* message = nullptr);
115 static void writing_error(const char* message = nullptr);
116
117 static void make_method_handle_intrinsics_shareable() NOT_CDS_RETURN;
118 static void write_method_handle_intrinsics() NOT_CDS_RETURN;
119 static Array<Method*>* archived_method_handle_intrinsics() { return _archived_method_handle_intrinsics; }
120 static void early_serialize(SerializeClosure* sc) NOT_CDS_RETURN;
121 static void serialize(SerializeClosure* sc) NOT_CDS_RETURN;
122
123 // JVM/TI RedefineClasses() support:
124 // Remap the shared readonly space to shared readwrite, private if
125 // sharing is enabled. Simply returns true if sharing is not enabled
126 // or if the remapping has already been done by a prior call.
127 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
128 static bool remapped_readwrite() {
129 CDS_ONLY(return _remapped_readwrite);
130 NOT_CDS(return false);
131 }
132
161 // 0x800000000 (unless it was set by -XX:SharedBaseAddress during -Xshare:dump).
162 static char* requested_base_address() {
163 return _requested_base_address;
164 }
165
166 // Non-zero if the archive(s) need to be mapped a non-default location due to ASLR.
167 static intx relocation_delta() { return _relocation_delta; }
168
169 static bool use_windows_memory_mapping() {
170 const bool is_windows = (NOT_WINDOWS(false) WINDOWS_ONLY(true));
171 //const bool is_windows = true; // enable this to allow testing the windows mmap semantics on Linux, etc.
172 return is_windows;
173 }
174
175 // Can we skip some expensive operations related to modules?
176 static bool use_optimized_module_handling() { return NOT_CDS(false) CDS_ONLY(_use_optimized_module_handling); }
177 static void disable_optimized_module_handling() { _use_optimized_module_handling = false; }
178
179 private:
180 static void read_extra_data(JavaThread* current, const char* filename) NOT_CDS_RETURN;
181 static bool write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info);
182 static FileMapInfo* open_static_archive();
183 static FileMapInfo* open_dynamic_archive();
184 // use_requested_addr: If true (default), attempt to map at the address the
185 static MapArchiveResult map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
186 bool use_requested_addr);
187 static char* reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
188 FileMapInfo* dynamic_mapinfo,
189 bool use_archive_base_addr,
190 ReservedSpace& total_space_rs,
191 ReservedSpace& archive_space_rs,
192 ReservedSpace& class_space_rs);
193 static void release_reserved_spaces(ReservedSpace& total_space_rs,
194 ReservedSpace& archive_space_rs,
195 ReservedSpace& class_space_rs);
196 static MapArchiveResult map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs);
197 static void unmap_archive(FileMapInfo* mapinfo);
198 static void get_default_classlist(char* default_classlist, const size_t buf_size);
199 };
200 #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 static jlong _preimage_static_archive_recording_duration;
66
67 public:
68 enum {
69 // core archive spaces
70 rw = 0, // read-write shared space
71 ro = 1, // read-only shared space
72 bm = 2, // relocation bitmaps (freed after file mapping is finished)
73 hp = 3, // heap region
74 ac = 4, // aot code
75 num_core_region = 2, // rw and ro
76 n_regions = 5 // total number of regions
77 };
78
79 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
80 #ifdef _LP64
81 static void adjust_heap_sizes_for_dumping() NOT_CDS_JAVA_HEAP_RETURN;
82 #endif
83
84 private:
85 static void exercise_runtime_cds_code(TRAPS) NOT_CDS_RETURN;
86 static void preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) NOT_CDS_RETURN;
87 static void preload_classes(TRAPS) NOT_CDS_RETURN;
88
89 public:
90 static Symbol* symbol_rs_base() {
91 return (Symbol*)_symbol_rs.base();
92 }
93
94 static void initialize_for_static_dump() NOT_CDS_RETURN;
95 static void open_static_archive() NOT_CDS_RETURN;
96 static void initialize_runtime_shared_and_meta_spaces() NOT_CDS_RETURN;
97 static void post_initialize(TRAPS) NOT_CDS_RETURN;
98
99 static void print_on(outputStream* st);
100
101 static void set_archive_loading_failed() {
102 _archive_loading_failed = true;
103 }
104
105 static void initialize_shared_spaces() NOT_CDS_RETURN;
106
107 // Return true if given address is in the shared metaspace regions (i.e., excluding the
108 // mapped heap region.)
109 static bool is_in_shared_metaspace(const void* p) {
110 return MetaspaceObj::is_shared((const MetaspaceObj*)p);
111 }
112
113 static void set_shared_metaspace_range(void* base, void *static_top, void* top) NOT_CDS_RETURN;
114
115 static bool is_shared_dynamic(void* p) NOT_CDS_RETURN_(false);
116 static bool is_shared_static(void* p) NOT_CDS_RETURN_(false);
117
118 static bool is_recording_preimage_static_archive() NOT_CDS_RETURN_(false);
119 static jlong get_preimage_static_archive_recording_duration() NOT_CDS_RETURN_(0);
120
121 static void unrecoverable_loading_error(const char* message = nullptr);
122 static void unrecoverable_writing_error(const char* message = nullptr);
123 static void writing_error(const char* message = nullptr);
124
125 static void make_method_handle_intrinsics_shareable() NOT_CDS_RETURN;
126 static void write_method_handle_intrinsics() NOT_CDS_RETURN;
127 static Array<Method*>* archived_method_handle_intrinsics() { return _archived_method_handle_intrinsics; }
128 static void early_serialize(SerializeClosure* sc) NOT_CDS_RETURN;
129 static void serialize(SerializeClosure* sc) NOT_CDS_RETURN;
130
131 // JVM/TI RedefineClasses() support:
132 // Remap the shared readonly space to shared readwrite, private if
133 // sharing is enabled. Simply returns true if sharing is not enabled
134 // or if the remapping has already been done by a prior call.
135 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
136 static bool remapped_readwrite() {
137 CDS_ONLY(return _remapped_readwrite);
138 NOT_CDS(return false);
139 }
140
169 // 0x800000000 (unless it was set by -XX:SharedBaseAddress during -Xshare:dump).
170 static char* requested_base_address() {
171 return _requested_base_address;
172 }
173
174 // Non-zero if the archive(s) need to be mapped a non-default location due to ASLR.
175 static intx relocation_delta() { return _relocation_delta; }
176
177 static bool use_windows_memory_mapping() {
178 const bool is_windows = (NOT_WINDOWS(false) WINDOWS_ONLY(true));
179 //const bool is_windows = true; // enable this to allow testing the windows mmap semantics on Linux, etc.
180 return is_windows;
181 }
182
183 // Can we skip some expensive operations related to modules?
184 static bool use_optimized_module_handling() { return NOT_CDS(false) CDS_ONLY(_use_optimized_module_handling); }
185 static void disable_optimized_module_handling() { _use_optimized_module_handling = false; }
186
187 private:
188 static void read_extra_data(JavaThread* current, const char* filename) NOT_CDS_RETURN;
189 static void fork_and_dump_final_static_archive(TRAPS);
190 static void fork_and_dump_final_static_archive_experimental_leyden_workflow(TRAPS);
191 static bool write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info);
192 static FileMapInfo* open_dynamic_archive();
193 // use_requested_addr: If true (default), attempt to map at the address the
194 static MapArchiveResult map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
195 bool use_requested_addr);
196 static char* reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
197 FileMapInfo* dynamic_mapinfo,
198 bool use_archive_base_addr,
199 ReservedSpace& total_space_rs,
200 ReservedSpace& archive_space_rs,
201 ReservedSpace& class_space_rs);
202 static void release_reserved_spaces(ReservedSpace& total_space_rs,
203 ReservedSpace& archive_space_rs,
204 ReservedSpace& class_space_rs);
205 static MapArchiveResult map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs);
206 static void unmap_archive(FileMapInfo* mapinfo);
207 static void get_default_classlist(char* default_classlist, const size_t buf_size);
208 };
209 #endif // SHARE_CDS_METASPACESHARED_HPP
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