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linux-user: mmap_reserve() not controlled by RESERVED_VA 

mmap_reserve() should be called only when RESERVED_VA is enabled.
Otherwise, unmaped virtual address space will never be reusable. This
bug will exhaust virtual address space in extreme conditions.

Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
This commit is contained in:
amateur 2010-09-14 13:22:34 +08:00 committed by Riku Voipio
parent b0e102dd22
commit c65ffe6d6c
1 changed files with 3 additions and 1 deletions
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2
linux-user/mmap.c
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@ -697,8 +697,10 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
old_size, new_size, old_size, new_size,
flags | MREMAP_FIXED, flags | MREMAP_FIXED,
g2h(mmap_start)); g2h(mmap_start));
if ( RESERVED_VA ) {
mmap_reserve(old_addr, old_size); mmap_reserve(old_addr, old_size);
} }
}
} else { } else {
int prot = 0; int prot = 0;
if (RESERVED_VA && old_size < new_size) { if (RESERVED_VA && old_size < new_size) {