472
473 // byte_size is the size of the associated virtualspace.
474 VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) {
475 assert_is_size_aligned(bytes, Metaspace::reserve_alignment());
476
477 #if INCLUDE_CDS
478 // This allocates memory with mmap. For DumpSharedspaces, try to reserve
479 // configurable address, generally at the top of the Java heap so other
480 // memory addresses don't conflict.
481 if (DumpSharedSpaces) {
482 bool large_pages = false; // No large pages when dumping the CDS archive.
483 char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment());
484
485 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base);
486 if (_rs.is_reserved()) {
487 assert(shared_base == 0 || _rs.base() == shared_base, "should match");
488 } else {
489 // Get a mmap region anywhere if the SharedBaseAddress fails.
490 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages);
491 }
492 MetaspaceShared::initialize_shared_rs(&_rs);
493 } else
494 #endif
495 {
496 bool large_pages = should_commit_large_pages_when_reserving(bytes);
497
498 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages);
499 }
500
501 if (_rs.is_reserved()) {
502 assert(_rs.base() != NULL, "Catch if we get a NULL address");
503 assert(_rs.size() != 0, "Catch if we get a 0 size");
504 assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment());
505 assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment());
506
507 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass);
508 }
509 }
510
511 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) {
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472
473 // byte_size is the size of the associated virtualspace.
474 VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) {
475 assert_is_size_aligned(bytes, Metaspace::reserve_alignment());
476
477 #if INCLUDE_CDS
478 // This allocates memory with mmap. For DumpSharedspaces, try to reserve
479 // configurable address, generally at the top of the Java heap so other
480 // memory addresses don't conflict.
481 if (DumpSharedSpaces) {
482 bool large_pages = false; // No large pages when dumping the CDS archive.
483 char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment());
484
485 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base);
486 if (_rs.is_reserved()) {
487 assert(shared_base == 0 || _rs.base() == shared_base, "should match");
488 } else {
489 // Get a mmap region anywhere if the SharedBaseAddress fails.
490 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages);
491 }
492 if (!_rs.is_reserved()) {
493 vm_exit_during_initialization("Unable to allocate memory for shared space",
494 err_msg(SIZE_FORMAT " bytes.", bytes));
495 }
496 MetaspaceShared::initialize_shared_rs(&_rs);
497 } else
498 #endif
499 {
500 bool large_pages = should_commit_large_pages_when_reserving(bytes);
501
502 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages);
503 }
504
505 if (_rs.is_reserved()) {
506 assert(_rs.base() != NULL, "Catch if we get a NULL address");
507 assert(_rs.size() != 0, "Catch if we get a 0 size");
508 assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment());
509 assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment());
510
511 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass);
512 }
513 }
514
515 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) {
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