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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364/* * PROJECT: ReactOS kernel-mode tests * LICENSE: LGPL-2.1+ (https://spdx.org/licenses/LGPL-2.1+) * PURPOSE: Kernel-Mode Test Suite Guarded Memory example test * COPYRIGHT: Copyright 2011-2018 Thomas Faber <thomas.faber@reactos.org> */
#include <kmt_test.h>
#ifdef __GNUC__#pragma GCC diagnostic ignored "-Wnonnull"#endif /* defined __GNUC__ */
START_TEST(GuardedMemory){ NTSTATUS Status; SIZE_T Size = 123; PCHAR *Buffer;
/* access some invalid memory to test SEH */ Status = STATUS_SUCCESS; _SEH2_TRY { RtlFillMemory(NULL, 1, 0); } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { Status = _SEH2_GetExceptionCode(); } _SEH2_END; ok_eq_hex(Status, STATUS_ACCESS_VIOLATION);
/* get guarded mem */ Buffer = KmtAllocateGuarded(Size);
if (skip(Buffer != NULL, "Failed to allocate guarded memory\n")) return;
/* access to guarded mem should be fine */ Status = STATUS_SUCCESS; _SEH2_TRY { RtlFillMemory(Buffer, Size, 0); } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { Status = _SEH2_GetExceptionCode(); } _SEH2_END; ok_eq_hex(Status, STATUS_SUCCESS);
/* access one byte behind guarded mem must cause an access violation! */ Status = STATUS_SUCCESS; _SEH2_TRY { RtlFillMemory(Buffer + Size, 1, 0); } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { Status = _SEH2_GetExceptionCode(); } _SEH2_END; ok_eq_hex(Status, STATUS_ACCESS_VIOLATION);
KmtFreeGuarded(Buffer);}