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(allocate_stack): If MULTI_PAGE_ALIASING is defined and the size of the stack which must be allocated is a multiple, allocate one more page.
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@ -379,6 +379,15 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
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pd = get_cached_stack (&size, &mem);
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if (pd == NULL)
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{
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/* To avoid aliasing effects on a larger scale then pages we
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adjust the allocated stack size if necessary. This way
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allocations directly following each other will not have
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aliasing problems. */
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#if MULTI_PAGE_ALIASING != 0
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if ((size % MULTI_PAGE_ALIASING) == 0)
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size += pagesize_m1 + 1;
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#endif
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mem = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS | ARCH_MAP_FLAGS, -1, 0);
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