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add _mi_os_guard_page_size

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daanx 2024-12-23 16:28:34 -08:00
parent 88d8ee964f
commit b515a0ad4c
5 changed files with 91 additions and 42 deletions
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8
include/mimalloc/internal.h
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@ -116,6 +116,7 @@ void _mi_os_free(void* p, size_t size, mi_memid_t memid);
void _mi_os_free_ex(void* p, size_t size, bool still_committed, mi_memid_t memid);
size_t _mi_os_page_size(void);
size_t _mi_os_guard_page_size(void);
size_t _mi_os_good_alloc_size(size_t size);
bool _mi_os_has_overcommit(void);
bool _mi_os_has_virtual_reserve(void);
@ -129,6 +130,13 @@ bool _mi_os_unprotect(void* addr, size_t size);
bool _mi_os_purge(void* p, size_t size);
bool _mi_os_purge_ex(void* p, size_t size, bool allow_reset);
size_t _mi_os_secure_guard_page_size(void);
bool _mi_os_secure_guard_page_set_at(void* addr, bool is_pinned);
bool _mi_os_secure_guard_page_set_before(void* addr, bool is_pinned);
bool _mi_os_secure_guard_page_reset_at(void* addr);
bool _mi_os_secure_guard_page_reset_before(void* addr);
void* _mi_os_alloc_aligned(size_t size, size_t alignment, bool commit, bool allow_large, mi_memid_t* memid);
void* _mi_os_alloc_aligned_at_offset(size_t size, size_t alignment, size_t align_offset, bool commit, bool allow_large, mi_memid_t* memid);

7
include/mimalloc/types.h
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@ -46,8 +46,12 @@ terms of the MIT license. A copy of the license can be found in the file
// Define MI_STAT as 1 to maintain statistics; set it to 2 to have detailed statistics (but costs some performance).
// #define MI_STAT 1
// Define MI_SECURE to enable security mitigations. The lowest two have minimal performance impact:
// Define MI_SECURE to enable security mitigations. Level 1 has minimal performance impact,
// but protects most metadata with guard pages:
// #define MI_SECURE 1 // guard page around metadata
//
// Level 2 has more performance impact but protect well against various buffer overflows
// by surrounding all mimalloc pages with guard pages:
// #define MI_SECURE 2 // guard page around each mimalloc page (can fragment VMA's with large heaps..)
//
// The next two levels can have more performance cost:
@ -126,7 +130,6 @@ terms of the MIT license. A copy of the license can be found in the file
#define MI_MEDIUM_PAGE_SIZE (8*MI_SMALL_PAGE_SIZE) // 512 KiB (=byte in the bitmap)
#define MI_LARGE_PAGE_SIZE (MI_SIZE_SIZE*MI_MEDIUM_PAGE_SIZE) // 4 MiB (=word in the bitmap)
// Maximum number of size classes. (spaced exponentially in 12.5% increments)
#define MI_BIN_HUGE (73U)
#define MI_BIN_FULL (MI_BIN_HUGE+1)