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initial working guarded pages

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daanx
2024-08-19 21:21:40 -07:00
parent 7b5df14bea
commit 0c19eb60cf
12 changed files with 196 additions and 37 deletions
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9
src/segment.c
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@@ -448,13 +448,18 @@ uint8_t* _mi_segment_page_start(const mi_segment_t* segment, const mi_page_t* pa
static size_t mi_segment_calculate_sizes(size_t capacity, size_t required, size_t* pre_size, size_t* info_size)
{
const size_t minsize = sizeof(mi_segment_t) + ((capacity - 1) * sizeof(mi_page_t)) + 16 /* padding */;
const size_t minsize = sizeof(mi_segment_t) + ((capacity - 1) * sizeof(mi_page_t)) + 16 /* padding */;
size_t guardsize = 0;
size_t isize = 0;
if (MI_SECURE == 0) {
// normally no guard pages
#if MI_DEBUG_GUARDED
isize = _mi_align_up(minsize, _mi_os_page_size());
#else
isize = _mi_align_up(minsize, 16 * MI_MAX_ALIGN_SIZE);
#endif
}
else {
// in secure mode, we set up a protected page in between the segment info
@@ -462,7 +467,7 @@ static size_t mi_segment_calculate_sizes(size_t capacity, size_t required, size_
const size_t page_size = _mi_os_page_size();
isize = _mi_align_up(minsize, page_size);
guardsize = page_size;
required = _mi_align_up(required, page_size);
//required = _mi_align_up(required, isize + guardsize);
}
if (info_size != NULL) *info_size = isize;