20 lines
584 B
C
20 lines
584 B
C
#include "../factor.h"
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void *alloc_guarded(CELL size)
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{
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SYSTEM_INFO si;
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char *mem;
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DWORD ignore;
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GetSystemInfo(&si);
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mem = (char *)VirtualAlloc(NULL, si.dwPageSize*2 + size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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if (!VirtualProtect(mem, si.dwPageSize, PAGE_NOACCESS, &ignore))
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fatal_error("Cannot allocate low guard page", (CELL)mem);
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if (!VirtualProtect(mem+size+si.dwPageSize, si.dwPageSize, PAGE_NOACCESS, &ignore))
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fatal_error("Cannot allocate high guard page", (CELL)mem);
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return mem + si.dwPageSize;
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}
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