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ntdll: Extend debugger tests.
[wine/multimedia.git] / dlls / ntdll / tests / exception.c
blob08ec9c650c703741e2cae8af34f9ea706e57332b
1 /*
2 * Unit test suite for ntdll exceptions
3 *
4 * Copyright 2005 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include <stdarg.h>
22 #include <stdio.h>
23
24 #ifndef _WIN32_WINNT
25 #define _WIN32_WINNT 0x500 /* For NTSTATUS */
26 #endif
27
28 #include "ntstatus.h"
29 #define WIN32_NO_STATUS
30 #include "windef.h"
31 #include "winbase.h"
32 #include "winnt.h"
33 #include "winreg.h"
34 #include "winternl.h"
35 #include "excpt.h"
36 #include "wine/test.h"
37
38 #ifdef __i386__
39 static int my_argc;
40 static char** my_argv;
41 static int test_stage;
42
43 static struct _TEB * (WINAPI *pNtCurrentTeb)(void);
44 static NTSTATUS (WINAPI *pNtGetContextThread)(HANDLE,CONTEXT*);
45 static NTSTATUS (WINAPI *pNtSetContextThread)(HANDLE,CONTEXT*);
46 static NTSTATUS (WINAPI *pRtlRaiseException)(EXCEPTION_RECORD *rec);
47 static PVOID (WINAPI *pRtlAddVectoredExceptionHandler)(ULONG first, PVECTORED_EXCEPTION_HANDLER func);
48 static ULONG (WINAPI *pRtlRemoveVectoredExceptionHandler)(PVOID handler);
49 static NTSTATUS (WINAPI *pNtReadVirtualMemory)(HANDLE, const void*, void*, SIZE_T, SIZE_T*);
50 static NTSTATUS (WINAPI *pNtTerminateProcess)(HANDLE handle, LONG exit_code);
51 static void *code_mem;
52
53 /* Test various instruction combinations that cause a protection fault on the i386,
54 * and check what the resulting exception looks like.
55 */
56
57 static const struct exception
58 {
59 BYTE code[18]; /* asm code */
60 BYTE offset; /* offset of faulting instruction */
61 BYTE length; /* length of faulting instruction */
62 NTSTATUS status; /* expected status code */
63 DWORD nb_params; /* expected number of parameters */
64 DWORD params[4]; /* expected parameters */
65 } exceptions[] =
66 {
67 /* test some privileged instructions */
68 { { 0xfb, 0xc3 }, /* sti; ret */
69 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
70 { { 0x6c, 0xc3 }, /* insb (%dx); ret */
71 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
72 { { 0x6d, 0xc3 }, /* insl (%dx); ret */
73 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
74 { { 0x6e, 0xc3 }, /* outsb (%dx); ret */
75 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
76 { { 0x6f, 0xc3 }, /* outsl (%dx); ret */
77 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
78 { { 0xe4, 0x11, 0xc3 }, /* inb $0x11,%al; ret */
79 0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
80 { { 0xe5, 0x11, 0xc3 }, /* inl $0x11,%eax; ret */
81 0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
82 { { 0xe6, 0x11, 0xc3 }, /* outb %al,$0x11; ret */
83 0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
84 { { 0xe7, 0x11, 0xc3 }, /* outl %eax,$0x11; ret */
85 0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
86 { { 0xed, 0xc3 }, /* inl (%dx),%eax; ret */
87 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
88 { { 0xee, 0xc3 }, /* outb %al,(%dx); ret */
89 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
90 { { 0xef, 0xc3 }, /* outl %eax,(%dx); ret */
91 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
92 { { 0xf4, 0xc3 }, /* hlt; ret */
93 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
94 { { 0xfa, 0xc3 }, /* cli; ret */
95 0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
96
97 /* test long jump to invalid selector */
98 { { 0xea, 0, 0, 0, 0, 0, 0, 0xc3 }, /* ljmp $0,$0; ret */
99 0, 7, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
100
101 /* test iret to invalid selector */
102 { { 0x6a, 0x00, 0x6a, 0x00, 0x6a, 0x00, 0xcf, 0x83, 0xc4, 0x0c, 0xc3 },
103 /* pushl $0; pushl $0; pushl $0; iret; addl $12,%esp; ret */
104 6, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
105
106 /* test loading an invalid selector */
107 { { 0xb8, 0xef, 0xbe, 0x00, 0x00, 0x8e, 0xe8, 0xc3 }, /* mov $beef,%ax; mov %ax,%gs; ret */
108 5, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xbee8 } },
109
110 /* test accessing a zero selector */
111 { { 0x06, 0x31, 0xc0, 0x8e, 0xc0, 0x26, 0xa1, 0, 0, 0, 0, 0x07, 0xc3 },
112 /* push %es; xor %eax,%eax; mov %ax,%es; mov %es:(0),%ax; pop %es */
113 5, 6, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
114
115 /* test moving %cs -> %ss */
116 { { 0x0e, 0x17, 0x58, 0xc3 }, /* pushl %cs; popl %ss; popl %eax; ret */
117 1, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
118
119 /* test overlong instruction (limit is 16 bytes) */
120 { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
121 0, 16, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
122 { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
123 0, 15, STATUS_PRIVILEGED_INSTRUCTION, 0 },
124
125 /* test invalid interrupt */
126 { { 0xcd, 0xff, 0xc3 }, /* int $0xff; ret */
127 0, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
128
129 /* test moves to/from Crx */
130 { { 0x0f, 0x20, 0xc0, 0xc3 }, /* movl %cr0,%eax; ret */
131 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
132 { { 0x0f, 0x20, 0xe0, 0xc3 }, /* movl %cr4,%eax; ret */
133 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
134 { { 0x0f, 0x22, 0xc0, 0xc3 }, /* movl %eax,%cr0; ret */
135 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
136 { { 0x0f, 0x22, 0xe0, 0xc3 }, /* movl %eax,%cr4; ret */
137 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
138
139 /* test moves to/from Drx */
140 { { 0x0f, 0x21, 0xc0, 0xc3 }, /* movl %dr0,%eax; ret */
141 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
142 { { 0x0f, 0x21, 0xc8, 0xc3 }, /* movl %dr1,%eax; ret */
143 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
144 { { 0x0f, 0x21, 0xf8, 0xc3 }, /* movl %dr7,%eax; ret */
145 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
146 { { 0x0f, 0x23, 0xc0, 0xc3 }, /* movl %eax,%dr0; ret */
147 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
148 { { 0x0f, 0x23, 0xc8, 0xc3 }, /* movl %eax,%dr1; ret */
149 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
150 { { 0x0f, 0x23, 0xf8, 0xc3 }, /* movl %eax,%dr7; ret */
151 0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
152
153 /* test memory reads */
154 { { 0xa1, 0xfc, 0xff, 0xff, 0xff, 0xc3 }, /* movl 0xfffffffc,%eax; ret */
155 0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffc } },
156 { { 0xa1, 0xfd, 0xff, 0xff, 0xff, 0xc3 }, /* movl 0xfffffffd,%eax; ret */
157 0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffd } },
158 { { 0xa1, 0xfe, 0xff, 0xff, 0xff, 0xc3 }, /* movl 0xfffffffe,%eax; ret */
159 0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffe } },
160 { { 0xa1, 0xff, 0xff, 0xff, 0xff, 0xc3 }, /* movl 0xffffffff,%eax; ret */
161 0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
162
163 /* test memory writes */
164 { { 0xa3, 0xfc, 0xff, 0xff, 0xff, 0xc3 }, /* movl %eax,0xfffffffc; ret */
165 0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffc } },
166 { { 0xa3, 0xfd, 0xff, 0xff, 0xff, 0xc3 }, /* movl %eax,0xfffffffd; ret */
167 0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffd } },
168 { { 0xa3, 0xfe, 0xff, 0xff, 0xff, 0xc3 }, /* movl %eax,0xfffffffe; ret */
169 0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffe } },
170 { { 0xa3, 0xff, 0xff, 0xff, 0xff, 0xc3 }, /* movl %eax,0xffffffff; ret */
171 0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xffffffff } },
172 };
173
174 static int got_exception;
175 static BOOL have_vectored_api;
176
177 static void run_exception_test(const void *handler, const void* context,
178 const void *code, unsigned int code_size)
179 {
180 struct {
181 EXCEPTION_REGISTRATION_RECORD frame;
182 const void *context;
183 } exc_frame;
184 void (*func)(void) = code_mem;
185
186 exc_frame.frame.Handler = handler;
187 exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
188 exc_frame.context = context;
189
190 memcpy(code_mem, code, code_size);
191
192 pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
193 func();
194 pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
195 }
196
197 LONG CALLBACK rtlraiseexception_vectored_handler(EXCEPTION_POINTERS *ExceptionInfo)
198 {
199 PCONTEXT context = ExceptionInfo->ContextRecord;
200 PEXCEPTION_RECORD rec = ExceptionInfo->ExceptionRecord;
201 trace("vect. handler %08x addr:%p context.Eip:%x\n", rec->ExceptionCode,
202 rec->ExceptionAddress, context->Eip);
203
204 todo_wine {
205 ok(rec->ExceptionAddress == (char *)code_mem + 0xb, "ExceptionAddress at %p instead of %p\n",
206 rec->ExceptionAddress, (char *)code_mem + 0xb);
207
208 if (pNtCurrentTeb()->Peb->BeingDebugged)
209 ok((void *)context->Eax == pRtlRaiseException, "debugger managed to modify Eax to %x should be %p\n",
210 context->Eax, pRtlRaiseException);
211 }
212
213 /* check that context.Eip is fixed up only for EXCEPTION_BREAKPOINT
214 * even if raised by RtlRaiseException
215 */
216 if(rec->ExceptionCode == EXCEPTION_BREAKPOINT)
217 {
218 todo_wine {
219 ok(context->Eip == (DWORD)code_mem + 0xa, "Eip at %x instead of %x\n",
220 context->Eip, (DWORD)code_mem + 0xa);
221 }
222 }
223 else
224 {
225 ok(context->Eip == (DWORD)code_mem + 0xb, "Eip at %x instead of %x\n",
226 context->Eip, (DWORD)code_mem + 0xb);
227 }
228
229 /* test if context change is preserved from vectored handler to stack handlers */
230 context->Eax = 0xf00f00f0;
231 return EXCEPTION_CONTINUE_SEARCH;
232 }
233
234 static DWORD rtlraiseexception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
235 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
236 {
237 trace( "exception: %08x flags:%x addr:%p context: Eip:%x\n",
238 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, context->Eip );
239
240 todo_wine {
241 ok(rec->ExceptionAddress == (char *)code_mem + 0xb, "ExceptionAddress at %p instead of %p\n",
242 rec->ExceptionAddress, (char *)code_mem + 0xb);
243 }
244
245 /* check that context.Eip is fixed up only for EXCEPTION_BREAKPOINT
246 * even if raised by RtlRaiseException
247 */
248 if(rec->ExceptionCode == EXCEPTION_BREAKPOINT)
249 {
250 todo_wine {
251 ok(context->Eip == (DWORD)code_mem + 0xa, "Eip at %x instead of %x\n",
252 context->Eip, (DWORD)code_mem + 0xa);
253 }
254 }
255 else
256 {
257 ok(context->Eip == (DWORD)code_mem + 0xb, "Eip at %x instead of %x\n",
258 context->Eip, (DWORD)code_mem + 0xb);
259 }
260
261 if(have_vectored_api)
262 ok(context->Eax == 0xf00f00f0, "Eax is %x, should have been set to 0xf00f00f0 in vectored handler\n",
263 context->Eax);
264
265 /* give the debugger a chance to examine the state a second time */
266 /* without the exception handler changing Eip */
267 if (test_stage == 2)
268 return ExceptionContinueSearch;
269
270 /* Eip in context is decreased by 1
271 * Increase it again, else execution will continue in the middle of a instruction */
272 if(rec->ExceptionCode == EXCEPTION_BREAKPOINT && (context->Eip == (DWORD)code_mem + 0xa))
273 context->Eip += 1;
274 return ExceptionContinueExecution;
275 }
276
277
278 static const BYTE call_one_arg_code[] = {
279 0x8b, 0x44, 0x24, 0x08, /* mov 0x8(%esp),%eax */
280 0x50, /* push %eax */
281 0x8b, 0x44, 0x24, 0x08, /* mov 0x8(%esp),%eax */
282 0xff, 0xd0, /* call *%eax */
283 0x90, /* nop */
284 0x90, /* nop */
285 0x90, /* nop */
286 0x90, /* nop */
287 0xc3, /* ret */
288 };
289
290
291 static void run_rtlraiseexception_test(DWORD exceptioncode)
292 {
293 EXCEPTION_REGISTRATION_RECORD frame;
294 EXCEPTION_RECORD record;
295 PVOID vectored_handler = NULL;
296
297 void (*func)(void* function, EXCEPTION_RECORD* record) = code_mem;
298
299 record.ExceptionCode = exceptioncode;
300 record.ExceptionFlags = 0;
301 record.ExceptionRecord = NULL;
302 record.ExceptionAddress = NULL; /* does not matter, copied return address */
303 record.NumberParameters = 0;
304
305 frame.Handler = rtlraiseexception_handler;
306 frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
307
308 memcpy(code_mem, call_one_arg_code, sizeof(call_one_arg_code));
309
310 pNtCurrentTeb()->Tib.ExceptionList = &frame;
311 if (have_vectored_api)
312 {
313 vectored_handler = pRtlAddVectoredExceptionHandler(TRUE, &rtlraiseexception_vectored_handler);
314 ok(vectored_handler != 0, "RtlAddVectoredExceptionHandler failed\n");
315 }
316
317 func(pRtlRaiseException, &record);
318
319 if (have_vectored_api)
320 pRtlRemoveVectoredExceptionHandler(vectored_handler);
321 pNtCurrentTeb()->Tib.ExceptionList = frame.Prev;
322 }
323
324 static void test_rtlraiseexcpetion(void)
325 {
326 if (!pRtlRaiseException)
327 {
328 skip("RtlRaiseException not found\n");
329 return;
330 }
331
332 /* test without debugger */
333 run_rtlraiseexception_test(0x12345);
334 run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
335 run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
336 }
337
338 static DWORD handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
339 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
340 {
341 const struct exception *except = *(const struct exception **)(frame + 1);
342 unsigned int i, entry = except - exceptions;
343
344 got_exception++;
345 trace( "exception: %x flags:%x addr:%p\n",
346 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
347
348 ok( rec->ExceptionCode == except->status,
349 "%u: Wrong exception code %x/%x\n", entry, rec->ExceptionCode, except->status );
350 ok( rec->ExceptionAddress == (char*)code_mem + except->offset,
351 "%u: Wrong exception address %p/%p\n", entry,
352 rec->ExceptionAddress, (char*)code_mem + except->offset );
353
354 ok( rec->NumberParameters == except->nb_params,
355 "%u: Wrong number of parameters %u/%u\n", entry, rec->NumberParameters, except->nb_params );
356
357 /* Most CPUs (except Intel Core apparently) report a segment limit violation */
358 /* instead of page faults for accesses beyond 0xffffffff */
359 if (except->nb_params == 2 && except->params[1] >= 0xfffffffd)
360 {
361 if (rec->ExceptionInformation[0] == 0 && rec->ExceptionInformation[1] == 0xffffffff)
362 goto skip_params;
363 }
364
365 for (i = 0; i < rec->NumberParameters; i++)
366 ok( rec->ExceptionInformation[i] == except->params[i],
367 "%u: Wrong parameter %d: %lx/%x\n",
368 entry, i, rec->ExceptionInformation[i], except->params[i] );
369
370 skip_params:
371 /* don't handle exception if it's not the address we expected */
372 if (rec->ExceptionAddress != (char*)code_mem + except->offset) return ExceptionContinueSearch;
373
374 context->Eip += except->length;
375 return ExceptionContinueExecution;
376 }
377
378 static void test_prot_fault(void)
379 {
380 unsigned int i;
381
382 for (i = 0; i < sizeof(exceptions)/sizeof(exceptions[0]); i++)
383 {
384 got_exception = 0;
385 run_exception_test(handler, &exceptions[i], &exceptions[i].code,
386 sizeof(exceptions[i].code));
387 if (!i && !got_exception)
388 {
389 trace( "No exception, assuming win9x, no point in testing further\n" );
390 break;
391 }
392 ok( got_exception == (exceptions[i].status != 0),
393 "%u: bad exception count %d\n", i, got_exception );
394 }
395 }
396
397 /* test handling of debug registers */
398 static DWORD dreg_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
399 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
400 {
401 context->Eip += 2; /* Skips the popl (%eax) */
402 context->Dr0 = 0x42424242;
403 context->Dr1 = 0;
404 context->Dr2 = 0;
405 context->Dr3 = 0;
406 context->Dr6 = 0;
407 context->Dr7 = 0x155;
408 return ExceptionContinueExecution;
409 }
410
411 static const BYTE segfault_code[5] = {
412 0x31, 0xc0, /* xor %eax,%eax */
413 0x8f, 0x00, /* popl (%eax) - cause exception */
414 0xc3 /* ret */
415 };
416
417 /* test the single step exception behaviour */
418 static DWORD single_step_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
419 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
420 {
421 got_exception++;
422 ok (!(context->EFlags & 0x100), "eflags has single stepping bit set\n");
423
424 if( got_exception < 3)
425 context->EFlags |= 0x100; /* single step until popf instruction */
426 else {
427 /* show that the last single step exception on the popf instruction
428 * (which removed the TF bit), still is a EXCEPTION_SINGLE_STEP exception */
429 ok( rec->ExceptionCode == EXCEPTION_SINGLE_STEP,
430 "exception is not EXCEPTION_SINGLE_STEP: %x\n", rec->ExceptionCode);
431 }
432
433 return ExceptionContinueExecution;
434 }
435
436 static const BYTE single_stepcode[] = {
437 0x9c, /* pushf */
438 0x58, /* pop %eax */
439 0x0d,0,1,0,0, /* or $0x100,%eax */
440 0x50, /* push %eax */
441 0x9d, /* popf */
442 0x35,0,1,0,0, /* xor $0x100,%eax */
443 0x50, /* push %eax */
444 0x9d, /* popf */
445 0xc3
446 };
447
448 /* Test the alignment check (AC) flag handling. */
449 static const BYTE align_check_code[] = {
450 0x55, /* push %ebp */
451 0x89,0xe5, /* mov %esp,%ebp */
452 0x9c, /* pushf */
453 0x58, /* pop %eax */
454 0x0d,0,0,4,0, /* or $0x40000,%eax */
455 0x50, /* push %eax */
456 0x9d, /* popf */
457 0x89,0xe0, /* mov %esp, %eax */
458 0x8b,0x40,0x1, /* mov 0x1(%eax), %eax - cause exception */
459 0x9c, /* pushf */
460 0x58, /* pop %eax */
461 0x35,0,0,4,0, /* xor $0x40000,%eax */
462 0x50, /* push %eax */
463 0x9d, /* popf */
464 0x5d, /* pop %ebp */
465 0xc3, /* ret */
466 };
467
468 static DWORD align_check_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
469 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
470 {
471 ok (!(context->EFlags & 0x40000), "eflags has AC bit set\n");
472 got_exception++;
473 return ExceptionContinueExecution;
474 }
475
476 /* test single stepping over hardware breakpoint */
477 static DWORD bpx_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
478 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
479 {
480 got_exception++;
481 ok( rec->ExceptionCode == EXCEPTION_SINGLE_STEP,
482 "wrong exception code: %x\n", rec->ExceptionCode);
483
484 if(got_exception == 1) {
485 /* hw bp exception on first nop */
486 ok( context->Eip == (DWORD)code_mem, "eip is wrong: %x instead of %x\n",
487 context->Eip, (DWORD)code_mem);
488 ok( (context->Dr6 & 0xf) == 1, "B0 flag is not set in Dr6\n");
489 ok( !(context->Dr6 & 0x4000), "BS flag is set in Dr6\n");
490 context->Dr0 = context->Dr0 + 1; /* set hw bp again on next instruction */
491 context->EFlags |= 0x100; /* enable single stepping */
492 } else if( got_exception == 2) {
493 /* single step exception on second nop */
494 ok( context->Eip == (DWORD)code_mem + 1, "eip is wrong: %x instead of %x\n",
495 context->Eip, (DWORD)code_mem + 1);
496 todo_wine{ ok( (context->Dr6 & 0x4000), "BS flag is not set in Dr6\n"); };
497 ok( (context->Dr6 & 0xf) == 0, "B0...3 flags in Dr6 shouldn't be set\n");
498 context->EFlags |= 0x100;
499 } else if( got_exception == 3) {
500 /* hw bp exception on second nop */
501 ok( context->Eip == (DWORD)code_mem + 1, "eip is wrong: %x instead of %x\n",
502 context->Eip, (DWORD)code_mem + 1);
503 todo_wine{ ok( (context->Dr6 & 0xf) == 1, "B0 flag is not set in Dr6\n"); };
504 ok( !(context->Dr6 & 0x4000), "BS flag is set in Dr6\n");
505 context->Dr0 = 0; /* clear breakpoint */
506 context->EFlags |= 0x100;
507 } else {
508 /* single step exception on ret */
509 ok( context->Eip == (DWORD)code_mem + 2, "eip is wrong: %x instead of %x\n",
510 context->Eip, (DWORD)code_mem + 2);
511 ok( (context->Dr6 & 0xf) == 0, "B0...3 flags in Dr6 shouldn't be set\n");
512 todo_wine{ ok( (context->Dr6 & 0x4000), "BS flag is not set in Dr6\n"); };
513 }
514
515 context->Dr6 = 0; /* clear status register */
516 return ExceptionContinueExecution;
517 }
518
519 static const BYTE dummy_code[] = { 0x90, 0x90, 0xc3 }; /* nop, nop, ret */
520
521 /* test int3 handling */
522 static DWORD int3_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
523 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
524 {
525 ok( rec->ExceptionAddress == code_mem, "exception address not at: %p, but at %p\n",
526 code_mem, rec->ExceptionAddress);
527 todo_wine {
528 ok( context->Eip == (DWORD)code_mem, "eip not at: %p, but at %#x\n", code_mem, context->Eip);
529 }
530 if(context->Eip == (DWORD)code_mem) context->Eip++; /* skip breakpoint */
531
532 return ExceptionContinueExecution;
533 }
534
535 static const BYTE int3_code[] = { 0xCC, 0xc3 }; /* int 3, ret */
536
537
538 static void test_exceptions(void)
539 {
540 CONTEXT ctx;
541 NTSTATUS res;
542
543 if (!pNtGetContextThread || !pNtSetContextThread)
544 {
545 trace( "NtGetContextThread/NtSetContextThread not found, skipping tests\n" );
546 return;
547 }
548
549 /* test handling of debug registers */
550 run_exception_test(dreg_handler, NULL, &segfault_code, sizeof(segfault_code));
551
552 ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
553 res = pNtGetContextThread(GetCurrentThread(), &ctx);
554 ok (res == STATUS_SUCCESS,"NtGetContextThread failed with %x\n", res);
555 ok(ctx.Dr0 == 0x42424242,"failed to set debugregister 0 to 0x42424242, got %x\n", ctx.Dr0);
556 ok(ctx.Dr7 == 0x155,"failed to set debugregister 7 to 0x155, got %x\n", ctx.Dr7);
557
558 /* test single stepping behavior */
559 got_exception = 0;
560 run_exception_test(single_step_handler, NULL, &single_stepcode, sizeof(single_stepcode));
561 ok(got_exception == 3, "expected 3 single step exceptions, got %d\n", got_exception);
562
563 /* test alignment exceptions */
564 got_exception = 0;
565 run_exception_test(align_check_handler, NULL, align_check_code, sizeof(align_check_code));
566 ok(got_exception == 0, "got %d alignment faults, expected 0\n", got_exception);
567
568 /* test single stepping over hardware breakpoint */
569 memset(&ctx, 0, sizeof(ctx));
570 ctx.Dr0 = (DWORD) code_mem; /* set hw bp on first nop */
571 ctx.Dr7 = 3;
572 ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
573 res = pNtSetContextThread( GetCurrentThread(), &ctx);
574 ok( res == STATUS_SUCCESS, "NtSetContextThread faild with %x\n", res);
575
576 got_exception = 0;
577 run_exception_test(bpx_handler, NULL, dummy_code, sizeof(dummy_code));
578 ok( got_exception == 4,"expected 4 exceptions, got %d\n", got_exception);
579
580 /* test int3 handling */
581 run_exception_test(int3_handler, NULL, int3_code, sizeof(int3_code));
582 }
583
584 static void test_debugger(void)
585 {
586 char cmdline[MAX_PATH];
587 PROCESS_INFORMATION pi;
588 STARTUPINFO si = { 0 };
589 DEBUG_EVENT de;
590 DWORD continuestatus;
591 PVOID code_mem_address = NULL;
592 NTSTATUS status;
593 SIZE_T size_read;
594 int counter = 0;
595 si.cb = sizeof(si);
596
597 if(!pNtGetContextThread || !pNtSetContextThread || !pNtReadVirtualMemory || !pNtTerminateProcess)
598 {
599 skip("NtGetContextThread, NtSetContextThread, NtReadVirtualMemory or NtTerminateProcess not found\n)");
600 return;
601 }
602
603 sprintf(cmdline, "%s %s %s", my_argv[0], my_argv[1], "debuggee");
604 ok(CreateProcess(NULL, cmdline, NULL, NULL, FALSE, DEBUG_PROCESS, NULL, NULL,
605 &si, &pi) != 0, "error: %u\n", GetLastError());
606
607 do
608 {
609 continuestatus = DBG_CONTINUE;
610 ok(WaitForDebugEvent(&de, INFINITE), "reading debug event\n");
611
612 if (de.dwThreadId != pi.dwThreadId)
613 {
614 trace("event %d not coming from main thread, ignoring\n", de.dwDebugEventCode);
615 ContinueDebugEvent(de.dwProcessId, de.dwThreadId, DBG_CONTINUE);
616 continue;
617 }
618
619 if (de.dwDebugEventCode == CREATE_PROCESS_DEBUG_EVENT)
620 {
621 if(de.u.CreateProcessInfo.lpBaseOfImage != pNtCurrentTeb()->Peb->ImageBaseAddress)
622 {
623 skip("child process loaded at different address, terminating it\n");
624 pNtTerminateProcess(pi.hProcess, 1);
625 }
626 }
627 else if (de.dwDebugEventCode == EXCEPTION_DEBUG_EVENT)
628 {
629 CONTEXT ctx;
630 int stage;
631
632 counter++;
633 status = pNtReadVirtualMemory(pi.hProcess, &code_mem, &code_mem_address,
634 sizeof(code_mem_address), &size_read);
635 ok(!status,"NtReadVirtualMemory failed with 0x%x\n", status);
636 status = pNtReadVirtualMemory(pi.hProcess, &test_stage, &stage,
637 sizeof(stage), &size_read);
638 ok(!status,"NtReadVirtualMemory failed with 0x%x\n", status);
639
640 ctx.ContextFlags = CONTEXT_FULL;
641 status = pNtGetContextThread(pi.hThread, &ctx);
642 ok(!status, "NtGetContextThread failed with 0x%x\n", status);
643
644 trace("excpetion 0x%x at %p firstchance=%d Eip=0x%x, Eax=0x%x\n",
645 de.u.Exception.ExceptionRecord.ExceptionCode,
646 de.u.Exception.ExceptionRecord.ExceptionAddress, de.u.Exception.dwFirstChance, ctx.Eip, ctx.Eax);
647
648 if (counter > 100)
649 {
650 ok(FALSE, "got way too many exceptions, probaby caught in a infinite loop, terminating child\n");
651 pNtTerminateProcess(pi.hProcess, 1);
652 }
653 else if (counter >= 2) /* skip startup breakpoint */
654 {
655 if (stage == 1)
656 {
657 ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at %x instead of %p\n",
658 ctx.Eip, (char *)code_mem_address + 0xb);
659 /* setting the context from debugger does not affect the context, the exception handlers gets */
660 /* uncomment once wine is fixed */
661 /* ctx.Eip = 0x12345; */
662 ctx.Eax = 0xf00f00f1;
663
664 /* let the debuggee handle the exception */
665 continuestatus = DBG_EXCEPTION_NOT_HANDLED;
666 }
667 else if (stage == 2)
668 {
669 if (de.u.Exception.dwFirstChance)
670 {
671 /* debugger gets first chance exception with unmodified ctx.Eip */
672 ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at 0x%x instead of %p\n",
673 ctx.Eip, (char *)code_mem_address + 0xb);
674
675 /* setting the context from debugger does not affect the context, the exception handlers gets */
676 /* uncomment once wine is fixed */
677 /* ctx.Eip = 0x12345; */
678 ctx.Eax = 0xf00f00f1;
679
680 /* pass exception to debuggee
681 * exception will not be handled and
682 * a second chance exception will be raised */
683 continuestatus = DBG_EXCEPTION_NOT_HANDLED;
684 }
685 else
686 {
687 /* debugger gets context after exception handler has played with it */
688 /* ctx.Eip is the same value the exception handler got */
689 if (de.u.Exception.ExceptionRecord.ExceptionCode == EXCEPTION_BREAKPOINT)
690 {
691 todo_wine{
692 ok((char *)ctx.Eip == (char *)code_mem_address + 0xa, "Eip at 0x%x instead of %p\n",
693 ctx.Eip, (char *)code_mem_address + 0xa);
694 }
695 /* need to fixup Eip for debuggee */
696 if ((char *)ctx.Eip == (char *)code_mem_address + 0xa)
697 ctx.Eip += 1;
698 }
699 else
700 ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at 0x%x instead of %p\n",
701 ctx.Eip, (char *)code_mem_address + 0xb);
702 /* here we handle exception */
703 }
704 }
705 else
706 ok(FALSE, "unexpected stage %d\n", stage);
707
708 status = pNtSetContextThread(pi.hThread, &ctx);
709 ok(!status, "NtSetContextThread failed with 0x%x\n", status);
710 }
711 }
712
713 ContinueDebugEvent(de.dwProcessId, de.dwThreadId, continuestatus);
714
715 } while (de.dwDebugEventCode != EXIT_PROCESS_DEBUG_EVENT);
716
717 ok(CloseHandle(pi.hThread) != 0, "error %u\n", GetLastError());
718 ok(CloseHandle(pi.hProcess) != 0, "error %u\n", GetLastError());
719
720 return;
721 }
722
723 #endif /* __i386__ */
724
725 START_TEST(exception)
726 {
727 #ifdef __i386__
728 pNtCurrentTeb = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtCurrentTeb" );
729 pNtGetContextThread = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtGetContextThread" );
730 pNtSetContextThread = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtSetContextThread" );
731 pNtReadVirtualMemory = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtReadVirtualMemory" );
732 pRtlRaiseException = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "RtlRaiseException" );
733 pNtTerminateProcess = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtTerminateProcess" );
734 pRtlAddVectoredExceptionHandler = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"),
735 "RtlAddVectoredExceptionHandler" );
736 pRtlRemoveVectoredExceptionHandler = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"),
737 "RtlRemoveVectoredExceptionHandler" );
738 if (!pNtCurrentTeb)
739 {
740 trace( "NtCurrentTeb not found, skipping tests\n" );
741 return;
742 }
743
744 if (pRtlAddVectoredExceptionHandler && pRtlRemoveVectoredExceptionHandler)
745 have_vectored_api = TRUE;
746 else
747 skip("RtlAddVectoredExceptionHandler or RtlRemoveVectoredExceptionHandler not found\n");
748
749 /* 1024 byte should be sufficient */
750 code_mem = VirtualAlloc(NULL, 1024, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
751 if(!code_mem) {
752 trace("VirtualAlloc failed\n");
753 return;
754 }
755
756 my_argc = winetest_get_mainargs( &my_argv );
757 if (my_argc >= 3)
758 {
759 /* child must be run under a debugger */
760 if (!pNtCurrentTeb()->Peb->BeingDebugged)
761 {
762 ok(FALSE, "child process not being debugged?\n");
763 return;
764 }
765
766 if (pRtlRaiseException)
767 {
768 test_stage = 1;
769 run_rtlraiseexception_test(0x12345);
770 run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
771 run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
772 test_stage = 2;
773 run_rtlraiseexception_test(0x12345);
774 run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
775 run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
776 }
777 else
778 skip( "RtlRaiseException not found\n" );
779
780 /* rest of tests only run in parent */
781 return;
782 }
783
784 test_prot_fault();
785 test_exceptions();
786 test_rtlraiseexcpetion();
787
788 test_debugger();
789
790 VirtualFree(code_mem, 1024, MEM_RELEASE);
791 #endif
792 }
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