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Fix memory reservation on MS-Windows

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* src/w32heap.c (mmap_alloc): Reserve memory in 64KB granular
units.  This avoids leaving gaps in reserved memory regions that
no one can use, since memory reservation must produce 64KB-aligned
addresses.  (Bug#22526)
This commit is contained in:
Eli Zaretskii 2016-02-20 18:59:14 +02:00
parent c5f72aa573
commit ea0b604412
1 changed files with 4 additions and 2 deletions
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6
src/w32heap.c
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@ -641,12 +641,14 @@ mmap_alloc (void **var, size_t nbytes)
advance, and the buffer is enlarged several times as the data is
decompressed on the fly. */
if (nbytes < MAX_BUFFER_SIZE)
p = VirtualAlloc (NULL, (nbytes * 2), MEM_RESERVE, PAGE_READWRITE);
p = VirtualAlloc (NULL, ROUND_UP (nbytes * 2, get_allocation_unit ()),
MEM_RESERVE, PAGE_READWRITE);
/* If it fails, or if the request is above 512MB, try with the
requested size. */
if (p == NULL)
p = VirtualAlloc (NULL, nbytes, MEM_RESERVE, PAGE_READWRITE);
p = VirtualAlloc (NULL, ROUND_UP (nbytes, get_allocation_unit ()),
MEM_RESERVE, PAGE_READWRITE);
if (p != NULL)
{