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Commit 6a5d3600 authored by Alexandre Julliard's avatar Alexandre Julliard
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libwine: Better heuristic for finding the top of the address space on Linux.

parent 6d4fb08e
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Showing with 5 additions and 4 deletions
libs/wine/mmap.c
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......@@ -338,15 +338,16 @@ void mmap_init(void)
if (stack_ptr >= user_space_limit)
{
char *end = 0;
char *base = stack_ptr - ((unsigned int)stack_ptr & granularity_mask) - (granularity_mask + 1);
if (base > user_space_limit) reserve_area( user_space_limit, base );
base = stack_ptr - ((unsigned int)stack_ptr & granularity_mask) + (granularity_mask + 1);
#ifdef linux
/* Linux heuristic: if the stack top is at c0000000, assume the address space */
/* ends there, this avoids a lot of futile allocation attempts */
if (base != (char *)0xc0000000)
/* Linux heuristic: assume the stack is near the end of the address */
/* space, this avoids a lot of futile allocation attempts */
end = (char *)(((unsigned long)base + 0x0fffffff) & 0xf0000000);
#endif
reserve_area( base, 0 );
reserve_area( base, end );
}
else reserve_area( user_space_limit, 0 );
#endif /* __i386__ */
......
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