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ntdll: More tests for exception handling. 

- Check if we really set the debug register.
- Added unaligned access exception check.
- Added single step exception check.
This commit is contained in:
Marcus Meissner 2006-10-03 17:19:36 +02:00 committed by Alexandre Julliard
parent 44ba993b6e
commit ef5f360163
1 changed files with 99 additions and 2 deletions
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101
dlls/ntdll/tests/exception.c
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@ -232,7 +232,7 @@ static DWORD dreg_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
context->Eip += 2; /* Skips the popl (%eax) */
context->Dr0 = 0;
context->Dr0 = 0x42424242;
context->Dr1 = 0;
context->Dr2 = 0;
context->Dr3 = 0;
@ -277,10 +277,105 @@ static void test_debug_regs(void)
pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
res = pNtGetContextThread(GetCurrentThread(), &ctx);
ok(res == STATUS_SUCCESS,"NtGetContextThread failed with %lx\n", res);
ok (res == STATUS_SUCCESS,"NtGetContextThread failed with %lx\n", res);
ok(ctx.Dr0 == 0x42424242,"failed to set debugregister 0 to 0x42424242, got %lx\n", ctx.Dr0);
ok(ctx.Dr7 == 0x155,"failed to set debugregister 7 to 0x155, got %lx\n", ctx.Dr7);
}
/* test the single step exception behaviour */
static int gotsinglesteps = 0;
static DWORD single_step_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
gotsinglesteps++;
ok (!(context->EFlags & 0x100), "eflags has single stepping bit set\n");
return ExceptionContinueExecution;
}
static BYTE single_stepcode[] = {
0x9c, /* pushf */
0x58, /* pop %eax */
0x0d,0,1,0,0, /* or $0x100,%eax */
0x50, /* push %eax */
0x9d, /* popf */
0x35,0,1,0,0, /* xor $0x100,%eax */
0x50, /* push %eax */
0x9d, /* popf */
0xc3
};
static void test_single_step(void)
{
struct {
EXCEPTION_REGISTRATION_RECORD frame;
} exc_frame;
void (*func)(void) = (void *)single_stepcode;
pNtCurrentTeb = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtCurrentTeb" );
if (!pNtCurrentTeb) {
trace( "NtCurrentTeb not found, skipping tests\n" );
return;
}
exc_frame.frame.Handler = single_step_handler;
exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
func();
ok(gotsinglesteps == 1, "expected 1 single step exceptions, got %d\n", gotsinglesteps);
pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
}
/* Test the alignment check (AC) flag handling. */
static BYTE align_check_code[] = {
0x55, /* push %ebp */
0x89,0xe5, /* mov %esp,%ebp */
0x9c, /* pushf */
0x58, /* pop %eax */
0x0d,0,0,4,0, /* or $0x40000,%eax */
0x50, /* push %eax */
0x9d, /* popf */
0x8b,0x45,8, /* mov 0x8(%ebp),%eax */
0xc7,0x40,1,42,0,0,0, /* movl $42,0x1(%eax) */
0x9c, /* pushf */
0x58, /* pop %eax */
0x35,0,0,4,0, /* xor $0x40000,%eax */
0x50, /* push %eax */
0x9d, /* popf */
0x5d, /* pop %ebp */
0xc3, /* ret */
};
static int gotalignfaults = 0;
static DWORD align_check_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
ok (!(context->EFlags & 0x40000), "eflags has AC bit set\n");
gotalignfaults++;
return ExceptionContinueExecution;
}
static void test_align_faults(void)
{
int twoints[2];
struct {
EXCEPTION_REGISTRATION_RECORD frame;
} exc_frame;
void (*func1)(int*) = (void *)align_check_code;
pNtCurrentTeb = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtCurrentTeb" );
if (!pNtCurrentTeb) {
trace( "NtCurrentTeb not found, skipping tests\n" );
return;
}
exc_frame.frame.Handler = align_check_handler;
exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
gotalignfaults=0;
func1(twoints);
ok(gotalignfaults == 0, "got %d alignment faults, expected 0\n", gotalignfaults);
pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
}
#endif /* __i386__ */
START_TEST(exception)
@ -288,5 +383,7 @@ START_TEST(exception)
#ifdef __i386__
test_prot_fault();
test_debug_regs();
test_single_step();
test_align_faults();
#endif
}