16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.inline.hpp"
28 #include "cds/archiveUtils.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/classListParser.hpp"
31 #include "cds/classListWriter.hpp"
32 #include "cds/dynamicArchive.hpp"
33 #include "cds/filemap.hpp"
34 #include "cds/heapShared.hpp"
35 #include "cds/metaspaceShared.hpp"
36 #include "classfile/systemDictionaryShared.hpp"
37 #include "classfile/vmClasses.hpp"
38 #include "interpreter/bootstrapInfo.hpp"
39 #include "memory/metaspaceUtils.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "oops/compressedOops.inline.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "runtime/arguments.hpp"
44 #include "utilities/bitMap.inline.hpp"
45 #include "utilities/debug.hpp"
46 #include "utilities/formatBuffer.hpp"
47 #include "utilities/globalDefinitions.hpp"
48
49 CHeapBitMap* ArchivePtrMarker::_ptrmap = nullptr;
50 CHeapBitMap* ArchivePtrMarker::_rw_ptrmap = nullptr;
51 CHeapBitMap* ArchivePtrMarker::_ro_ptrmap = nullptr;
52 VirtualSpace* ArchivePtrMarker::_vs;
53
54 bool ArchivePtrMarker::_compacted;
55
56 void ArchivePtrMarker::initialize(CHeapBitMap* ptrmap, VirtualSpace* vs) {
57 assert(_ptrmap == nullptr, "initialize only once");
58 assert(_rw_ptrmap == nullptr, "initialize only once");
59 assert(_ro_ptrmap == nullptr, "initialize only once");
60 _vs = vs;
61 _compacted = false;
62 _ptrmap = ptrmap;
63
64 // Use this as initial guesstimate. We should need less space in the
65 // archive, but if we're wrong the bitmap will be expanded automatically.
66 size_t estimated_archive_size = MetaspaceGC::capacity_until_GC();
67 // But set it smaller in debug builds so we always test the expansion code.
68 // (Default archive is about 12MB).
69 DEBUG_ONLY(estimated_archive_size = 6 * M);
70
71 // We need one bit per pointer in the archive.
72 _ptrmap->initialize(estimated_archive_size / sizeof(intptr_t));
73 }
74
75 void ArchivePtrMarker::initialize_rw_ro_maps(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap) {
76 address* rw_bottom = (address*)ArchiveBuilder::current()->rw_region()->base();
77 address* ro_bottom = (address*)ArchiveBuilder::current()->ro_region()->base();
78
79 _rw_ptrmap = rw_ptrmap;
80 _ro_ptrmap = ro_ptrmap;
81
82 size_t rw_size = ArchiveBuilder::current()->rw_region()->used() / sizeof(address);
83 size_t ro_size = ArchiveBuilder::current()->ro_region()->used() / sizeof(address);
84 // ro_start is the first bit in _ptrmap that covers the pointer that would sit at ro_bottom.
85 // E.g., if rw_bottom = (address*)100
86 // ro_bottom = (address*)116
87 // then for 64-bit platform:
88 // ro_start = ro_bottom - rw_bottom = (116 - 100) / sizeof(address) = 2;
89 size_t ro_start = ro_bottom - rw_bottom;
90
91 // Note: ptrmap is big enough only to cover the last pointer in ro_region.
92 // See ArchivePtrMarker::compact()
93 _rw_ptrmap->initialize(rw_size);
94 _ro_ptrmap->initialize(_ptrmap->size() - ro_start);
95
96 for (size_t rw_bit = 0; rw_bit < _rw_ptrmap->size(); rw_bit++) {
97 _rw_ptrmap->at_put(rw_bit, _ptrmap->at(rw_bit));
98 }
99
100 for(size_t ro_bit = ro_start; ro_bit < _ptrmap->size(); ro_bit++) {
101 _ro_ptrmap->at_put(ro_bit-ro_start, _ptrmap->at(ro_bit));
102 }
103 assert(_ptrmap->size() - ro_start == _ro_ptrmap->size(), "must be");
104 }
105
106 void ArchivePtrMarker::mark_pointer(address* ptr_loc) {
107 assert(_ptrmap != nullptr, "not initialized");
108 assert(!_compacted, "cannot mark anymore");
109
110 if (ptr_base() <= ptr_loc && ptr_loc < ptr_end()) {
111 address value = *ptr_loc;
112 // We don't want any pointer that points to very bottom of the archive, otherwise when
113 // MetaspaceShared::default_base_address()==0, we can't distinguish between a pointer
114 // to nothing (null) vs a pointer to an objects that happens to be at the very bottom
115 // of the archive.
116 assert(value != (address)ptr_base(), "don't point to the bottom of the archive");
117
118 if (value != nullptr) {
119 assert(uintx(ptr_loc) % sizeof(intptr_t) == 0, "pointers must be stored in aligned addresses");
120 size_t idx = ptr_loc - ptr_base();
121 if (_ptrmap->size() <= idx) {
122 _ptrmap->resize((idx + 1) * 2);
123 }
247 alignment = MAX2(SharedSpaceObjectAlignment, alignment);
248 char* p = (char*)align_up(_top, alignment);
249 char* newtop = p + align_up(num_bytes, (size_t)SharedSpaceObjectAlignment);
250 expand_top_to(newtop);
251 memset(p, 0, newtop - p);
252 return p;
253 }
254
255 void DumpRegion::append_intptr_t(intptr_t n, bool need_to_mark) {
256 assert(is_aligned(_top, sizeof(intptr_t)), "bad alignment");
257 intptr_t *p = (intptr_t*)_top;
258 char* newtop = _top + sizeof(intptr_t);
259 expand_top_to(newtop);
260 *p = n;
261 if (need_to_mark) {
262 ArchivePtrMarker::mark_pointer(p);
263 }
264 }
265
266 void DumpRegion::print(size_t total_bytes) const {
267 log_debug(cds)("%s space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used] at " INTPTR_FORMAT,
268 _name, used(), percent_of(used(), total_bytes), reserved(), percent_of(used(), reserved()),
269 p2i(ArchiveBuilder::current()->to_requested(_base)));
270 }
271
272 void DumpRegion::print_out_of_space_msg(const char* failing_region, size_t needed_bytes) {
273 log_error(cds)("[%-8s] " PTR_FORMAT " - " PTR_FORMAT " capacity =%9d, allocated =%9d",
274 _name, p2i(_base), p2i(_top), int(_end - _base), int(_top - _base));
275 if (strcmp(_name, failing_region) == 0) {
276 log_error(cds)(" required = %d", int(needed_bytes));
277 }
278 }
279
280 void DumpRegion::init(ReservedSpace* rs, VirtualSpace* vs) {
281 _rs = rs;
282 _vs = vs;
283 // Start with 0 committed bytes. The memory will be committed as needed.
284 if (!_vs->initialize(*_rs, 0)) {
285 fatal("Unable to allocate memory for shared space");
286 }
287 _base = _top = _rs->base();
288 _end = _rs->end();
289 }
290
291 void DumpRegion::pack(DumpRegion* next) {
292 assert(!is_packed(), "sanity");
293 _end = (char*)align_up(_top, MetaspaceShared::core_region_alignment());
294 _is_packed = true;
295 if (next != nullptr) {
296 next->_rs = _rs;
297 next->_vs = _vs;
298 next->_base = next->_top = this->_end;
299 next->_end = _rs->end();
300 }
301 }
302
303 void WriteClosure::do_ptr(void** p) {
304 // Write ptr into the archive; ptr can be:
305 // (a) null -> written as 0
306 // (b) a "buffered" address -> written as is
307 // (c) a "source" address -> convert to "buffered" and write
308 // The common case is (c). E.g., when writing the vmClasses into the archive.
309 // We have (b) only when we don't have a corresponding source object. E.g.,
310 // the archived c++ vtable entries.
311 address ptr = *(address*)p;
312 if (ptr != nullptr && !ArchiveBuilder::current()->is_in_buffer_space(ptr)) {
313 ptr = ArchiveBuilder::current()->get_buffered_addr(ptr);
314 }
354 if (SystemDictionaryShared::is_supported_invokedynamic(bootstrap_specifier)) {
355 const constantPoolHandle& pool = bootstrap_specifier->pool();
356 if (SystemDictionaryShared::is_builtin_loader(pool->pool_holder()->class_loader_data())) {
357 // Currently lambda proxy classes are supported only for the built-in loaders.
358 ResourceMark rm(THREAD);
359 int pool_index = bootstrap_specifier->bss_index();
360 ClassListWriter w;
361 w.stream()->print("%s %s", ClassListParser::lambda_proxy_tag(), pool->pool_holder()->name()->as_C_string());
362 CDSIndyInfo cii;
363 ClassListParser::populate_cds_indy_info(pool, pool_index, &cii, CHECK);
364 GrowableArray<const char*>* indy_items = cii.items();
365 for (int i = 0; i < indy_items->length(); i++) {
366 w.stream()->print(" %s", indy_items->at(i));
367 }
368 w.stream()->cr();
369 }
370 }
371 }
372 }
373
374 bool ArchiveUtils::has_aot_initialized_mirror(InstanceKlass* src_ik) {
375 if (SystemDictionaryShared::is_excluded_class(src_ik)) {
376 assert(!ArchiveBuilder::current()->has_been_buffered(src_ik), "sanity");
377 return false;
378 }
379 return ArchiveBuilder::current()->get_buffered_addr(src_ik)->has_aot_initialized_mirror();
380 }
381
382 size_t HeapRootSegments::size_in_bytes(size_t seg_idx) {
383 assert(seg_idx < _count, "In range");
384 return objArrayOopDesc::object_size(size_in_elems(seg_idx)) * HeapWordSize;
385 }
386
387 int HeapRootSegments::size_in_elems(size_t seg_idx) {
388 assert(seg_idx < _count, "In range");
389 if (seg_idx != _count - 1) {
390 return _max_size_in_elems;
391 } else {
392 // Last slice, leftover
393 return _roots_count % _max_size_in_elems;
394 }
395 }
396
397 size_t HeapRootSegments::segment_offset(size_t seg_idx) {
398 assert(seg_idx < _count, "In range");
399 return _base_offset + seg_idx * _max_size_in_bytes;
400 }
401
|
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.inline.hpp"
28 #include "cds/archiveUtils.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/classListParser.hpp"
31 #include "cds/classListWriter.hpp"
32 #include "cds/dynamicArchive.hpp"
33 #include "cds/filemap.hpp"
34 #include "cds/heapShared.hpp"
35 #include "cds/metaspaceShared.hpp"
36 #include "classfile/classLoader.hpp"
37 #include "classfile/systemDictionaryShared.hpp"
38 #include "classfile/vmClasses.hpp"
39 #include "interpreter/bootstrapInfo.hpp"
40 #include "memory/metaspaceUtils.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "oops/compressedOops.inline.hpp"
43 #include "oops/klass.inline.hpp"
44 #include "runtime/arguments.hpp"
45 #include "utilities/bitMap.inline.hpp"
46 #include "utilities/debug.hpp"
47 #include "utilities/formatBuffer.hpp"
48 #include "utilities/globalDefinitions.hpp"
49
50 CHeapBitMap* ArchivePtrMarker::_ptrmap = nullptr;
51 CHeapBitMap* ArchivePtrMarker::_rw_ptrmap = nullptr;
52 CHeapBitMap* ArchivePtrMarker::_ro_ptrmap = nullptr;
53 CHeapBitMap* ArchivePtrMarker::_cc_ptrmap = nullptr;
54 VirtualSpace* ArchivePtrMarker::_vs;
55
56 bool ArchivePtrMarker::_compacted;
57
58 void ArchivePtrMarker::initialize(CHeapBitMap* ptrmap, VirtualSpace* vs) {
59 assert(_ptrmap == nullptr, "initialize only once");
60 assert(_rw_ptrmap == nullptr, "initialize only once");
61 assert(_ro_ptrmap == nullptr, "initialize only once");
62 assert(_cc_ptrmap == nullptr, "initialize only once");
63 _vs = vs;
64 _compacted = false;
65 _ptrmap = ptrmap;
66
67 // Use this as initial guesstimate. We should need less space in the
68 // archive, but if we're wrong the bitmap will be expanded automatically.
69 size_t estimated_archive_size = MetaspaceGC::capacity_until_GC();
70 // But set it smaller in debug builds so we always test the expansion code.
71 // (Default archive is about 12MB).
72 DEBUG_ONLY(estimated_archive_size = 6 * M);
73
74 // We need one bit per pointer in the archive.
75 _ptrmap->initialize(estimated_archive_size / sizeof(intptr_t));
76 }
77
78 void ArchivePtrMarker::initialize_rw_ro_cc_maps(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap, CHeapBitMap* cc_ptrmap) {
79 address* rw_bottom = (address*)ArchiveBuilder::current()->rw_region()->base();
80 address* ro_bottom = (address*)ArchiveBuilder::current()->ro_region()->base();
81 address* cc_bottom = (address*)ArchiveBuilder::current()->cc_region()->base();
82
83 _rw_ptrmap = rw_ptrmap;
84 _ro_ptrmap = ro_ptrmap;
85 _cc_ptrmap = cc_ptrmap;
86
87 size_t rw_size = ArchiveBuilder::current()->rw_region()->used() / sizeof(address);
88 size_t ro_size = ArchiveBuilder::current()->ro_region()->used() / sizeof(address);
89 size_t cc_size = ArchiveBuilder::current()->cc_region()->used() / sizeof(address);
90 // ro_start is the first bit in _ptrmap that covers the pointer that would sit at ro_bottom.
91 // E.g., if rw_bottom = (address*)100
92 // ro_bottom = (address*)116
93 // then for 64-bit platform:
94 // ro_start = ro_bottom - rw_bottom = (116 - 100) / sizeof(address) = 2;
95 size_t ro_start = ro_bottom - rw_bottom;
96 size_t cc_start = cc_bottom - rw_bottom;
97
98 // Note: ptrmap is big enough only to cover the last pointer in cc_region or ro_region.
99 // See ArchivePtrMarker::compact()
100 if (ro_start + ro_size >_ptrmap->size()) {
101 ro_size = _ptrmap->size() - ro_start; // ro is smaller than we thought
102 cc_size = 0; // cc is empty
103 } else if (cc_size != 0 && cc_start + cc_size > _ptrmap->size()) {
104 cc_size = _ptrmap->size() - cc_start; // ro is smaller than we thought
105 }
106
107 assert(rw_size < _ptrmap->size(), "sanity");
108 assert(ro_size < _ptrmap->size(), "sanity");
109 assert(cc_size < _ptrmap->size(), "sanity");
110 assert(rw_size + ro_size + cc_size <= _ptrmap->size(), "sanity");
111
112 _rw_ptrmap->initialize(rw_size);
113 _ro_ptrmap->initialize(ro_size);
114 _cc_ptrmap->initialize(cc_size);
115
116 for (size_t i = 0; i < rw_size; i++) {
117 _rw_ptrmap->at_put(i, _ptrmap->at(i));
118 }
119 for (size_t i = 0; i < ro_size; i++) {
120 _ro_ptrmap->at_put(i, _ptrmap->at(ro_start + i));
121 }
122 for (size_t i = 0; i < cc_size; i++) {
123 _cc_ptrmap->at_put(i, _ptrmap->at(cc_start + i));
124 }
125 }
126
127 void ArchivePtrMarker::mark_pointer(address* ptr_loc) {
128 assert(_ptrmap != nullptr, "not initialized");
129 assert(!_compacted, "cannot mark anymore");
130
131 if (ptr_base() <= ptr_loc && ptr_loc < ptr_end()) {
132 address value = *ptr_loc;
133 // We don't want any pointer that points to very bottom of the archive, otherwise when
134 // MetaspaceShared::default_base_address()==0, we can't distinguish between a pointer
135 // to nothing (null) vs a pointer to an objects that happens to be at the very bottom
136 // of the archive.
137 assert(value != (address)ptr_base(), "don't point to the bottom of the archive");
138
139 if (value != nullptr) {
140 assert(uintx(ptr_loc) % sizeof(intptr_t) == 0, "pointers must be stored in aligned addresses");
141 size_t idx = ptr_loc - ptr_base();
142 if (_ptrmap->size() <= idx) {
143 _ptrmap->resize((idx + 1) * 2);
144 }
268 alignment = MAX2(SharedSpaceObjectAlignment, alignment);
269 char* p = (char*)align_up(_top, alignment);
270 char* newtop = p + align_up(num_bytes, (size_t)SharedSpaceObjectAlignment);
271 expand_top_to(newtop);
272 memset(p, 0, newtop - p);
273 return p;
274 }
275
276 void DumpRegion::append_intptr_t(intptr_t n, bool need_to_mark) {
277 assert(is_aligned(_top, sizeof(intptr_t)), "bad alignment");
278 intptr_t *p = (intptr_t*)_top;
279 char* newtop = _top + sizeof(intptr_t);
280 expand_top_to(newtop);
281 *p = n;
282 if (need_to_mark) {
283 ArchivePtrMarker::mark_pointer(p);
284 }
285 }
286
287 void DumpRegion::print(size_t total_bytes) const {
288 char* base = used() > 0 ? ArchiveBuilder::current()->to_requested(_base) : nullptr;
289 log_debug(cds)("%s space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used] at " INTPTR_FORMAT,
290 _name, used(), percent_of(used(), total_bytes), reserved(), percent_of(used(), reserved()),
291 p2i(base));
292 }
293
294 void DumpRegion::print_out_of_space_msg(const char* failing_region, size_t needed_bytes) {
295 log_error(cds)("[%-8s] " PTR_FORMAT " - " PTR_FORMAT " capacity =%9d, allocated =%9d",
296 _name, p2i(_base), p2i(_top), int(_end - _base), int(_top - _base));
297 if (strcmp(_name, failing_region) == 0) {
298 log_error(cds)(" required = %d", int(needed_bytes));
299 }
300 }
301
302 void DumpRegion::init(ReservedSpace* rs, VirtualSpace* vs) {
303 _rs = rs;
304 _vs = vs;
305 // Start with 0 committed bytes. The memory will be committed as needed.
306 if (!_vs->initialize(*_rs, 0)) {
307 fatal("Unable to allocate memory for shared space");
308 }
309 _base = _top = _rs->base();
310 _end = _rs->end();
311 }
312
313 void DumpRegion::pack(DumpRegion* next) {
314 if (!is_packed()) {
315 _end = (char*)align_up(_top, MetaspaceShared::core_region_alignment());
316 _is_packed = true;
317 }
318 if (next != nullptr) {
319 next->_rs = _rs;
320 next->_vs = _vs;
321 next->_base = next->_top = this->_end;
322 next->_end = _rs->end();
323 }
324 }
325
326 void WriteClosure::do_ptr(void** p) {
327 // Write ptr into the archive; ptr can be:
328 // (a) null -> written as 0
329 // (b) a "buffered" address -> written as is
330 // (c) a "source" address -> convert to "buffered" and write
331 // The common case is (c). E.g., when writing the vmClasses into the archive.
332 // We have (b) only when we don't have a corresponding source object. E.g.,
333 // the archived c++ vtable entries.
334 address ptr = *(address*)p;
335 if (ptr != nullptr && !ArchiveBuilder::current()->is_in_buffer_space(ptr)) {
336 ptr = ArchiveBuilder::current()->get_buffered_addr(ptr);
337 }
377 if (SystemDictionaryShared::is_supported_invokedynamic(bootstrap_specifier)) {
378 const constantPoolHandle& pool = bootstrap_specifier->pool();
379 if (SystemDictionaryShared::is_builtin_loader(pool->pool_holder()->class_loader_data())) {
380 // Currently lambda proxy classes are supported only for the built-in loaders.
381 ResourceMark rm(THREAD);
382 int pool_index = bootstrap_specifier->bss_index();
383 ClassListWriter w;
384 w.stream()->print("%s %s", ClassListParser::lambda_proxy_tag(), pool->pool_holder()->name()->as_C_string());
385 CDSIndyInfo cii;
386 ClassListParser::populate_cds_indy_info(pool, pool_index, &cii, CHECK);
387 GrowableArray<const char*>* indy_items = cii.items();
388 for (int i = 0; i < indy_items->length(); i++) {
389 w.stream()->print(" %s", indy_items->at(i));
390 }
391 w.stream()->cr();
392 }
393 }
394 }
395 }
396
397
398 // "boot", "platform", "app" or nullptr
399 const char* ArchiveUtils::builtin_loader_name_or_null(oop loader) {
400 if (loader == nullptr) {
401 return "boot";
402 } else if (loader == SystemDictionary::java_platform_loader()) {
403 return "platform";
404 } else if (loader == SystemDictionary::java_system_loader()) {
405 return "app";
406 } else {
407 return nullptr;
408 }
409 }
410
411 // "boot", "platform", "app". Asserts if not a built-in-loader
412 const char* ArchiveUtils::builtin_loader_name(oop loader) {
413 const char* name = builtin_loader_name_or_null(loader);
414 assert(name != nullptr, "must be a built-in loader");
415 return name;
416 }
417
418 bool ArchiveUtils::builtin_loader_from_type(const char* loader_type, oop* value_ret) {
419 if (strcmp(loader_type, "boot") == 0) {
420 *value_ret = nullptr;
421 return true;
422 } else if (strcmp(loader_type, "platform") == 0) {
423 *value_ret = SystemDictionary::java_platform_loader();
424 return true;
425 } else if (strcmp(loader_type, "app") == 0) {
426 *value_ret = SystemDictionary::java_system_loader();
427 return true;
428 } else {
429 DEBUG_ONLY(*value_ret = cast_to_oop((void*)badOopVal));
430 return false;
431 }
432 }
433
434 oop ArchiveUtils::builtin_loader_from_type(int loader_type) {
435 if (loader_type == ClassLoader::BOOT_LOADER) {
436 return nullptr;
437 } else if (loader_type == ClassLoader::PLATFORM_LOADER) {
438 return SystemDictionary::java_platform_loader();
439 } else if (loader_type == ClassLoader::APP_LOADER) {
440 return SystemDictionary::java_system_loader();
441 } else {
442 ShouldNotReachHere();
443 return nullptr;
444 }
445 }
446
447 bool ArchiveUtils::has_aot_initialized_mirror(InstanceKlass* src_ik) {
448 if (SystemDictionaryShared::is_excluded_class(src_ik)) {
449 assert(!ArchiveBuilder::current()->has_been_buffered(src_ik), "sanity");
450 return false;
451 }
452 return ArchiveBuilder::current()->get_buffered_addr(src_ik)->has_aot_initialized_mirror();
453 }
454
455 size_t HeapRootSegments::size_in_bytes(size_t seg_idx) {
456 assert(seg_idx < _count, "In range");
457 return objArrayOopDesc::object_size(size_in_elems(seg_idx)) * HeapWordSize;
458 }
459
460 int HeapRootSegments::size_in_elems(size_t seg_idx) {
461 assert(seg_idx < _count, "In range");
462 if (seg_idx != _count - 1) {
463 return _max_size_in_elems;
464 } else {
465 // Last slice, leftover
466 return _roots_count % _max_size_in_elems;
467 }
468 }
469
470 size_t HeapRootSegments::segment_offset(size_t seg_idx) {
471 assert(seg_idx < _count, "In range");
472 return _base_offset + seg_idx * _max_size_in_bytes;
473 }
|