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comparison src/share/vm/memory/allocation.hpp @ 9073:83f27710f5f7

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7197666: java -d64 -version core dumps in a box with lots of memory Summary: Allow task queues to be mmapped instead of malloced on Solaris Reviewed-by: coleenp, jmasa, johnc, tschatzl
author brutisso
date Mon, 08 Apr 2013 07:49:28 +0200
parents 4102b59539ce
children 89e4d67fdd2a f36e073d56a4 6f817ce50129 f75faf51e8c4
comparison
equal deleted inserted replaced
9072:8617e38bb4cb 9073:83f27710f5f7
609 public: 609 public:
610 ReallocMark() PRODUCT_RETURN; 610 ReallocMark() PRODUCT_RETURN;
611 void check() PRODUCT_RETURN; 611 void check() PRODUCT_RETURN;
612 }; 612 };
613 613
614 // Helper class to allocate arrays that may become large.
615 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit
616 // and uses mapped memory for larger allocations.
617 // Most OS mallocs do something similar but Solaris malloc does not revert
618 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit
619 // is set so that we always use malloc except for Solaris where we set the
620 // limit to get mapped memory.
621 template <class E, MEMFLAGS F>
622 class ArrayAllocator : StackObj {
623 char* _addr;
624 bool _use_malloc;
625 size_t _size;
626 public:
627 ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { }
628 ~ArrayAllocator() { free(); }
629 E* allocate(size_t length);
630 void free();
631 };
632
614 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP 633 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP