GuardedMemory.c File Reference

#include <kmt_test.h>

Include dependency graph for GuardedMemory.c:

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Functions
	START_TEST (GuardedMemory)

Function Documentation

START_TEST()

START_TEST

(

GuardedMemory

)

Definition at line 14 of file GuardedMemory.c.

{
    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);
}