gistfile1.txt

void mm(ULONG s)
{
	alloca(s);
}

void DumpStackRegion()
{
	MEMORY_BASIC_INFORMATION mbi;
	if (VirtualQuery(_AddressOfReturnAddress(), &mbi, sizeof(mbi)))
	{
		PVOID AllocationBase = mbi.AllocationBase;
		mbi.BaseAddress = AllocationBase;

		while (VirtualQuery(mbi.BaseAddress, &mbi, sizeof(mbi)) &&
			AllocationBase == mbi.AllocationBase)
		{
			PCSTR pszState = 0;
			switch (mbi.State)
			{
			case MEM_COMMIT:
				pszState = "COMMIT";
				break;
			case MEM_RESERVE:
				pszState = "RESERVE";
				break;
			default: return;
			}

			DbgPrint("[%p, %p) %p %08x %s\n", mbi.BaseAddress, 
				(ULONG_PTR)mbi.BaseAddress + mbi.RegionSize, 
				mbi.RegionSize, mbi.Protect, pszState);

			(ULONG_PTR&)mbi.BaseAddress += mbi.RegionSize;
		}
	}
}

void WINAPI FiberProc(FCTX* ctx)
{
	for (;;)
	{
		DbgPrint("%s\n", ctx->sz);
		DumpStackRegion();
		mm(0x8000);
		DumpStackRegion();
		SwitchToContext(ctx->MainFiber);
	}
}

/*
[000000DB1C800000, 000000DB1C8FC000) 00000000000FC000 00000000 RESERVE
[000000DB1C8FC000, 000000DB1C8FF000) 0000000000003000 00000104 COMMIT
[000000DB1C8FF000, 000000DB1C900000) 0000000000001000 00000004 COMMIT
************************************************************************
[000000DB1C800000, 000000DB1C8F4000) 00000000000F4000 00000000 RESERVE
[000000DB1C8F4000, 000000DB1C8F7000) 0000000000003000 00000104 COMMIT
[000000DB1C8F7000, 000000DB1C900000) 0000000000009000 00000004 COMMIT
*/