34 #include "runtime/semaphore.hpp"
35 #include "utilities/bitMap.hpp"
36 #include "utilities/exceptions.hpp"
37 #include "utilities/macros.hpp"
38
39 class BootstrapInfo;
40 class ReservedSpace;
41 class VirtualSpace;
42
43 template<class E> class Array;
44 template<class E> class GrowableArray;
45
46 // ArchivePtrMarker is used to mark the location of pointers embedded in a CDS archive. E.g., when an
47 // InstanceKlass k is dumped, we mark the location of the k->_name pointer by effectively calling
48 // mark_pointer(/*ptr_loc=*/&k->_name). It's required that (_prt_base <= ptr_loc < _ptr_end). _ptr_base is
49 // fixed, but _ptr_end can be expanded as more objects are dumped.
50 class ArchivePtrMarker : AllStatic {
51 static CHeapBitMap* _ptrmap;
52 static CHeapBitMap* _rw_ptrmap;
53 static CHeapBitMap* _ro_ptrmap;
54 static VirtualSpace* _vs;
55
56 // Once _ptrmap is compacted, we don't allow bit marking anymore. This is to
57 // avoid unintentional copy operations after the bitmap has been finalized and written.
58 static bool _compacted;
59
60 static address* ptr_base() { return (address*)_vs->low(); } // committed lower bound (inclusive)
61 static address* ptr_end() { return (address*)_vs->high(); } // committed upper bound (exclusive)
62
63 public:
64 static void initialize(CHeapBitMap* ptrmap, VirtualSpace* vs);
65 static void initialize_rw_ro_maps(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap);
66 static void mark_pointer(address* ptr_loc);
67 static void clear_pointer(address* ptr_loc);
68 static void compact(address relocatable_base, address relocatable_end);
69 static void compact(size_t max_non_null_offset);
70
71 template <typename T>
72 static void mark_pointer(T* ptr_loc) {
73 mark_pointer((address*)ptr_loc);
74 }
75
76 template <typename T>
77 static void set_and_mark_pointer(T* ptr_loc, T ptr_value) {
78 *ptr_loc = ptr_value;
79 mark_pointer(ptr_loc);
80 }
81
82 static CHeapBitMap* ptrmap() {
83 return _ptrmap;
84 }
85
86 static CHeapBitMap* rw_ptrmap() {
87 return _rw_ptrmap;
88 }
89
90 static CHeapBitMap* ro_ptrmap() {
91 return _ro_ptrmap;
92 }
93
94 static void reset_map_and_vs() {
95 _ptrmap = nullptr;
96 _rw_ptrmap = nullptr;
97 _ro_ptrmap = nullptr;
98 _vs = nullptr;
99 }
100 };
101
102 // SharedDataRelocator is used to shift pointers in the CDS archive.
103 //
104 // The CDS archive is basically a contiguous block of memory (divided into several regions)
105 // that contains multiple objects. The objects may contain direct pointers that point to other objects
106 // within the archive (e.g., InstanceKlass::_name points to a Symbol in the archive). During dumping, we
107 // built a bitmap that marks the locations of all these pointers (using ArchivePtrMarker, see comments above).
108 //
109 // The contents of the archive assumes that it's mapped at the default SharedBaseAddress (e.g. 0x800000000).
110 // If the archive ends up being mapped at a different address (e.g. 0x810000000), SharedDataRelocator
111 // is used to shift each marked pointer by a delta (0x10000000 in this example), so that it points to
112 // the actually mapped location of the target object.
113 class SharedDataRelocator: public BitMapClosure {
114 // for all (address** p), where (is_marked(p) && _patch_base <= p && p < _patch_end) { *p += delta; }
115
116 // Patch all pointers within this region that are marked.
117 address* _patch_base;
254 char* region_top() { return nullptr; }
255 };
256
257 class ArchiveUtils {
258 template <typename T> static Array<T>* archive_non_ptr_array(GrowableArray<T>* tmp_array);
259 template <typename T> static Array<T>* archive_ptr_array(GrowableArray<T>* tmp_array);
260
261 public:
262 static void log_to_classlist(BootstrapInfo* bootstrap_specifier, TRAPS) NOT_CDS_RETURN;
263 static bool has_aot_initialized_mirror(InstanceKlass* src_ik);
264
265 template <typename T, ENABLE_IF(!std::is_pointer<T>::value)>
266 static Array<T>* archive_array(GrowableArray<T>* tmp_array) {
267 return archive_non_ptr_array(tmp_array);
268 }
269
270 template <typename T, ENABLE_IF(std::is_pointer<T>::value)>
271 static Array<T>* archive_array(GrowableArray<T>* tmp_array) {
272 return archive_ptr_array(tmp_array);
273 }
274 };
275
276 class HeapRootSegments {
277 private:
278 size_t _base_offset;
279 size_t _count;
280 int _roots_count;
281 size_t _max_size_in_bytes;
282 int _max_size_in_elems;
283
284 public:
285 size_t base_offset() { return _base_offset; }
286 size_t count() { return _count; }
287 int roots_count() { return _roots_count; }
288 size_t max_size_in_bytes() { return _max_size_in_bytes; }
289 int max_size_in_elems() { return _max_size_in_elems; }
290
291 size_t size_in_bytes(size_t seg_idx);
292 int size_in_elems(size_t seg_idx);
293 size_t segment_offset(size_t seg_idx);
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34 #include "runtime/semaphore.hpp"
35 #include "utilities/bitMap.hpp"
36 #include "utilities/exceptions.hpp"
37 #include "utilities/macros.hpp"
38
39 class BootstrapInfo;
40 class ReservedSpace;
41 class VirtualSpace;
42
43 template<class E> class Array;
44 template<class E> class GrowableArray;
45
46 // ArchivePtrMarker is used to mark the location of pointers embedded in a CDS archive. E.g., when an
47 // InstanceKlass k is dumped, we mark the location of the k->_name pointer by effectively calling
48 // mark_pointer(/*ptr_loc=*/&k->_name). It's required that (_prt_base <= ptr_loc < _ptr_end). _ptr_base is
49 // fixed, but _ptr_end can be expanded as more objects are dumped.
50 class ArchivePtrMarker : AllStatic {
51 static CHeapBitMap* _ptrmap;
52 static CHeapBitMap* _rw_ptrmap;
53 static CHeapBitMap* _ro_ptrmap;
54 static CHeapBitMap* _ac_ptrmap;
55 static VirtualSpace* _vs;
56
57 // Once _ptrmap is compacted, we don't allow bit marking anymore. This is to
58 // avoid unintentional copy operations after the bitmap has been finalized and written.
59 static bool _compacted;
60
61 static address* ptr_base() { return (address*)_vs->low(); } // committed lower bound (inclusive)
62 static address* ptr_end() { return (address*)_vs->high(); } // committed upper bound (exclusive)
63
64 public:
65 static void initialize(CHeapBitMap* ptrmap, VirtualSpace* vs);
66 static void initialize_rw_ro_ac_maps(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap, CHeapBitMap* ac_ptrmap);
67 static void mark_pointer(address* ptr_loc);
68 static void clear_pointer(address* ptr_loc);
69 static void compact(address relocatable_base, address relocatable_end);
70 static void compact(size_t max_non_null_offset);
71
72 template <typename T>
73 static void mark_pointer(T* ptr_loc) {
74 mark_pointer((address*)ptr_loc);
75 }
76
77 template <typename T>
78 static void set_and_mark_pointer(T* ptr_loc, T ptr_value) {
79 *ptr_loc = ptr_value;
80 mark_pointer(ptr_loc);
81 }
82
83 static CHeapBitMap* ptrmap() {
84 return _ptrmap;
85 }
86
87 static CHeapBitMap* rw_ptrmap() {
88 return _rw_ptrmap;
89 }
90
91 static CHeapBitMap* ro_ptrmap() {
92 return _ro_ptrmap;
93 }
94
95 static CHeapBitMap* ac_ptrmap() {
96 return _ac_ptrmap;
97 }
98
99 static void reset_map_and_vs() {
100 _ptrmap = nullptr;
101 _rw_ptrmap = nullptr;
102 _ro_ptrmap = nullptr;
103 _ac_ptrmap = nullptr;
104 _vs = nullptr;
105 }
106 };
107
108 // SharedDataRelocator is used to shift pointers in the CDS archive.
109 //
110 // The CDS archive is basically a contiguous block of memory (divided into several regions)
111 // that contains multiple objects. The objects may contain direct pointers that point to other objects
112 // within the archive (e.g., InstanceKlass::_name points to a Symbol in the archive). During dumping, we
113 // built a bitmap that marks the locations of all these pointers (using ArchivePtrMarker, see comments above).
114 //
115 // The contents of the archive assumes that it's mapped at the default SharedBaseAddress (e.g. 0x800000000).
116 // If the archive ends up being mapped at a different address (e.g. 0x810000000), SharedDataRelocator
117 // is used to shift each marked pointer by a delta (0x10000000 in this example), so that it points to
118 // the actually mapped location of the target object.
119 class SharedDataRelocator: public BitMapClosure {
120 // for all (address** p), where (is_marked(p) && _patch_base <= p && p < _patch_end) { *p += delta; }
121
122 // Patch all pointers within this region that are marked.
123 address* _patch_base;
260 char* region_top() { return nullptr; }
261 };
262
263 class ArchiveUtils {
264 template <typename T> static Array<T>* archive_non_ptr_array(GrowableArray<T>* tmp_array);
265 template <typename T> static Array<T>* archive_ptr_array(GrowableArray<T>* tmp_array);
266
267 public:
268 static void log_to_classlist(BootstrapInfo* bootstrap_specifier, TRAPS) NOT_CDS_RETURN;
269 static bool has_aot_initialized_mirror(InstanceKlass* src_ik);
270
271 template <typename T, ENABLE_IF(!std::is_pointer<T>::value)>
272 static Array<T>* archive_array(GrowableArray<T>* tmp_array) {
273 return archive_non_ptr_array(tmp_array);
274 }
275
276 template <typename T, ENABLE_IF(std::is_pointer<T>::value)>
277 static Array<T>* archive_array(GrowableArray<T>* tmp_array) {
278 return archive_ptr_array(tmp_array);
279 }
280
281 static const char* builtin_loader_name_or_null(oop loader); // "boot", "platform", "app", or nullptr
282 static const char* builtin_loader_name(oop loader); // "boot", "platform", or "app". Asserts if not a built-in-loader.
283
284 static bool builtin_loader_from_type(const char* loader_type, oop* value_ret);
285 static oop builtin_loader_from_type(int loader_type);
286 };
287
288 class HeapRootSegments {
289 private:
290 size_t _base_offset;
291 size_t _count;
292 int _roots_count;
293 size_t _max_size_in_bytes;
294 int _max_size_in_elems;
295
296 public:
297 size_t base_offset() { return _base_offset; }
298 size_t count() { return _count; }
299 int roots_count() { return _roots_count; }
300 size_t max_size_in_bytes() { return _max_size_in_bytes; }
301 int max_size_in_elems() { return _max_size_in_elems; }
302
303 size_t size_in_bytes(size_t seg_idx);
304 int size_in_elems(size_t seg_idx);
305 size_t segment_offset(size_t seg_idx);
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