msan_test.cc revision 6567092b06b37195cd93d57204bcbfe6843b2a48 
1//===-- msan_test.cc ------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of MemorySanitizer.
11//
12// MemorySanitizer unit tests.
13//===----------------------------------------------------------------------===//
14
15#ifndef MSAN_EXTERNAL_TEST_CONFIG
16#include "msan_test_config.h"
17#endif // MSAN_EXTERNAL_TEST_CONFIG
18
19#include "sanitizer/msan_interface.h"
20#include "msandr_test_so.h"
21
22#include <inttypes.h>
23#include <stdlib.h>
24#include <stdarg.h>
25#include <stdio.h>
26#include <assert.h>
27#include <wchar.h>
28#include <math.h>
29
30#include <arpa/inet.h>
31#include <dlfcn.h>
32#include <grp.h>
33#include <unistd.h>
34#include <link.h>
35#include <limits.h>
36#include <sys/time.h>
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <fcntl.h>
40#include <sys/resource.h>
41#include <sys/ioctl.h>
42#include <sys/sysinfo.h>
43#include <sys/utsname.h>
44#include <sys/mman.h>
45#include <sys/vfs.h>
46#include <dirent.h>
47#include <pwd.h>
48#include <sys/socket.h>
49#include <netdb.h>
50
51#if defined(__i386__) || defined(__x86_64__)
52# include <emmintrin.h>
53# define MSAN_HAS_M128 1
54#else
55# define MSAN_HAS_M128 0
56#endif
57
58typedef unsigned char      U1;
59typedef unsigned short     U2;  // NOLINT
60typedef unsigned int       U4;
61typedef unsigned long long U8;  // NOLINT
62typedef   signed char      S1;
63typedef   signed short     S2;  // NOLINT
64typedef   signed int       S4;
65typedef   signed long long S8;  // NOLINT
66#define NOINLINE      __attribute__((noinline))
67#define INLINE      __attribute__((always_inline))
68
69static bool TrackingOrigins() {
70  S8 x;
71  __msan_set_origin(&x, sizeof(x), 0x1234);
72  U4 origin = __msan_get_origin(&x);
73  __msan_set_origin(&x, sizeof(x), 0);
74  return origin == 0x1234;
75}
76
77#define EXPECT_UMR(action) \
78    do {                        \
79      __msan_set_expect_umr(1); \
80      action;                   \
81      __msan_set_expect_umr(0); \
82    } while (0)
83
84#define EXPECT_UMR_O(action, origin) \
85    do {                                            \
86      __msan_set_expect_umr(1);                     \
87      action;                                       \
88      __msan_set_expect_umr(0);                     \
89      if (TrackingOrigins())                        \
90        EXPECT_EQ(origin, __msan_get_umr_origin()); \
91    } while (0)
92
93#define EXPECT_UMR_S(action, stack_origin) \
94    do {                                            \
95      __msan_set_expect_umr(1);                     \
96      action;                                       \
97      __msan_set_expect_umr(0);                     \
98      U4 id = __msan_get_umr_origin();             \
99      const char *str = __msan_get_origin_descr_if_stack(id); \
100      if (!str || strcmp(str, stack_origin)) {      \
101        fprintf(stderr, "EXPECT_POISONED_S: id=%u %s, %s", \
102                id, stack_origin, str);  \
103        EXPECT_EQ(1, 0);                            \
104      }                                             \
105    } while (0)
106
107#define EXPECT_POISONED(x) ExpectPoisoned(x)
108
109template<typename T>
110void ExpectPoisoned(const T& t) {
111  EXPECT_NE(-1, __msan_test_shadow((void*)&t, sizeof(t)));
112}
113
114#define EXPECT_POISONED_O(x, origin) \
115  ExpectPoisonedWithOrigin(x, origin)
116
117template<typename T>
118void ExpectPoisonedWithOrigin(const T& t, unsigned origin) {
119  EXPECT_NE(-1, __msan_test_shadow((void*)&t, sizeof(t)));
120  if (TrackingOrigins())
121    EXPECT_EQ(origin, __msan_get_origin((void*)&t));
122}
123
124#define EXPECT_POISONED_S(x, stack_origin) \
125  ExpectPoisonedWithStackOrigin(x, stack_origin)
126
127template<typename T>
128void ExpectPoisonedWithStackOrigin(const T& t, const char *stack_origin) {
129  EXPECT_NE(-1, __msan_test_shadow((void*)&t, sizeof(t)));
130  U4 id = __msan_get_origin((void*)&t);
131  const char *str = __msan_get_origin_descr_if_stack(id);
132  if (!str || strcmp(str, stack_origin)) {
133    fprintf(stderr, "EXPECT_POISONED_S: id=%u %s, %s",
134        id, stack_origin, str);
135    EXPECT_EQ(1, 0);
136  }
137}
138
139#define EXPECT_NOT_POISONED(x) ExpectNotPoisoned(x)
140
141template<typename T>
142void ExpectNotPoisoned(const T& t) {
143  EXPECT_EQ(-1, __msan_test_shadow((void*)&t, sizeof(t)));
144}
145
146static U8 poisoned_array[100];
147template<class T>
148T *GetPoisoned(int i = 0, T val = 0) {
149  T *res = (T*)&poisoned_array[i];
150  *res = val;
151  __msan_poison(&poisoned_array[i], sizeof(T));
152  return res;
153}
154
155template<class T>
156T *GetPoisonedO(int i, U4 origin, T val = 0) {
157  T *res = (T*)&poisoned_array[i];
158  *res = val;
159  __msan_poison(&poisoned_array[i], sizeof(T));
160  __msan_set_origin(&poisoned_array[i], sizeof(T), origin);
161  return res;
162}
163
164// This function returns its parameter but in such a way that compiler
165// can not prove it.
166template<class T>
167NOINLINE
168static T Ident(T t) {
169  volatile T ret = t;
170  return ret;
171}
172
173template<class T> NOINLINE T ReturnPoisoned() { return *GetPoisoned<T>(); }
174
175static volatile int g_one = 1;
176static volatile int g_zero = 0;
177static volatile int g_0 = 0;
178static volatile int g_1 = 1;
179
180S4 a_s4[100];
181S8 a_s8[100];
182
183// Check that malloc poisons memory.
184// A lot of tests below depend on this.
185TEST(MemorySanitizerSanity, PoisonInMalloc) {
186  int *x = (int*)malloc(sizeof(int));
187  EXPECT_POISONED(*x);
188  free(x);
189}
190
191TEST(MemorySanitizer, NegativeTest1) {
192  S4 *x = GetPoisoned<S4>();
193  if (g_one)
194    *x = 0;
195  EXPECT_NOT_POISONED(*x);
196}
197
198TEST(MemorySanitizer, PositiveTest1) {
199  // Load to store.
200  EXPECT_POISONED(*GetPoisoned<S1>());
201  EXPECT_POISONED(*GetPoisoned<S2>());
202  EXPECT_POISONED(*GetPoisoned<S4>());
203  EXPECT_POISONED(*GetPoisoned<S8>());
204
205  // S->S conversions.
206  EXPECT_POISONED(*GetPoisoned<S1>());
207  EXPECT_POISONED(*GetPoisoned<S1>());
208  EXPECT_POISONED(*GetPoisoned<S1>());
209
210  EXPECT_POISONED(*GetPoisoned<S2>());
211  EXPECT_POISONED(*GetPoisoned<S2>());
212  EXPECT_POISONED(*GetPoisoned<S2>());
213
214  EXPECT_POISONED(*GetPoisoned<S4>());
215  EXPECT_POISONED(*GetPoisoned<S4>());
216  EXPECT_POISONED(*GetPoisoned<S4>());
217
218  EXPECT_POISONED(*GetPoisoned<S8>());
219  EXPECT_POISONED(*GetPoisoned<S8>());
220  EXPECT_POISONED(*GetPoisoned<S8>());
221
222  // ZExt
223  EXPECT_POISONED(*GetPoisoned<U1>());
224  EXPECT_POISONED(*GetPoisoned<U1>());
225  EXPECT_POISONED(*GetPoisoned<U1>());
226  EXPECT_POISONED(*GetPoisoned<U2>());
227  EXPECT_POISONED(*GetPoisoned<U2>());
228  EXPECT_POISONED(*GetPoisoned<U4>());
229
230  // Unary ops.
231  EXPECT_POISONED(- *GetPoisoned<S4>());
232
233  EXPECT_UMR(a_s4[g_zero] = 100 / *GetPoisoned<S4>(0, 1));
234
235
236  a_s4[g_zero] = 1 - *GetPoisoned<S4>();
237  a_s4[g_zero] = 1 + *GetPoisoned<S4>();
238}
239
240TEST(MemorySanitizer, Phi1) {
241  S4 c;
242  if (g_one) {
243    c = *GetPoisoned<S4>();
244  } else {
245    break_optimization(0);
246    c = 0;
247  }
248  EXPECT_POISONED(c);
249}
250
251TEST(MemorySanitizer, Phi2) {
252  S4 i = *GetPoisoned<S4>();
253  S4 n = g_one;
254  EXPECT_UMR(for (; i < g_one; i++););
255  EXPECT_POISONED(i);
256}
257
258NOINLINE void Arg1ExpectUMR(S4 a1) { EXPECT_POISONED(a1); }
259NOINLINE void Arg2ExpectUMR(S4 a1, S4 a2) { EXPECT_POISONED(a2); }
260NOINLINE void Arg3ExpectUMR(S1 a1, S4 a2, S8 a3) { EXPECT_POISONED(a3); }
261
262TEST(MemorySanitizer, ArgTest) {
263  Arg1ExpectUMR(*GetPoisoned<S4>());
264  Arg2ExpectUMR(0, *GetPoisoned<S4>());
265  Arg3ExpectUMR(0, 1, *GetPoisoned<S8>());
266}
267
268
269TEST(MemorySanitizer, CallAndRet) {
270  if (!__msan_has_dynamic_component()) return;
271  ReturnPoisoned<S1>();
272  ReturnPoisoned<S2>();
273  ReturnPoisoned<S4>();
274  ReturnPoisoned<S8>();
275
276  EXPECT_POISONED(ReturnPoisoned<S1>());
277  EXPECT_POISONED(ReturnPoisoned<S2>());
278  EXPECT_POISONED(ReturnPoisoned<S4>());
279  EXPECT_POISONED(ReturnPoisoned<S8>());
280}
281
282// malloc() in the following test may be optimized to produce a compile-time
283// undef value. Check that we trap on the volatile assignment anyway.
284TEST(MemorySanitizer, DISABLED_MallocNoIdent) {
285  S4 *x = (int*)malloc(sizeof(S4));
286  EXPECT_POISONED(*x);
287  free(x);
288}
289
290TEST(MemorySanitizer, Malloc) {
291  S4 *x = (int*)Ident(malloc(sizeof(S4)));
292  EXPECT_POISONED(*x);
293  free(x);
294}
295
296TEST(MemorySanitizer, Realloc) {
297  S4 *x = (int*)Ident(realloc(0, sizeof(S4)));
298  EXPECT_POISONED(x[0]);
299  x[0] = 1;
300  x = (int*)Ident(realloc(x, 2 * sizeof(S4)));
301  EXPECT_NOT_POISONED(x[0]);  // Ok, was inited before.
302  EXPECT_POISONED(x[1]);
303  x = (int*)Ident(realloc(x, 3 * sizeof(S4)));
304  EXPECT_NOT_POISONED(x[0]);  // Ok, was inited before.
305  EXPECT_POISONED(x[2]);
306  EXPECT_POISONED(x[1]);
307  x[2] = 1;  // Init this here. Check that after realloc it is poisoned again.
308  x = (int*)Ident(realloc(x, 2 * sizeof(S4)));
309  EXPECT_NOT_POISONED(x[0]);  // Ok, was inited before.
310  EXPECT_POISONED(x[1]);
311  x = (int*)Ident(realloc(x, 3 * sizeof(S4)));
312  EXPECT_POISONED(x[1]);
313  EXPECT_POISONED(x[2]);
314  free(x);
315}
316
317TEST(MemorySanitizer, Calloc) {
318  S4 *x = (int*)Ident(calloc(1, sizeof(S4)));
319  EXPECT_NOT_POISONED(*x);  // Should not be poisoned.
320  // EXPECT_EQ(0, *x);
321  free(x);
322}
323
324TEST(MemorySanitizer, AndOr) {
325  U4 *p = GetPoisoned<U4>();
326  // We poison two bytes in the midle of a 4-byte word to make the test
327  // correct regardless of endianness.
328  ((U1*)p)[1] = 0;
329  ((U1*)p)[2] = 0xff;
330  EXPECT_NOT_POISONED(*p & 0x00ffff00);
331  EXPECT_NOT_POISONED(*p & 0x00ff0000);
332  EXPECT_NOT_POISONED(*p & 0x0000ff00);
333  EXPECT_POISONED(*p & 0xff000000);
334  EXPECT_POISONED(*p & 0x000000ff);
335  EXPECT_POISONED(*p & 0x0000ffff);
336  EXPECT_POISONED(*p & 0xffff0000);
337
338  EXPECT_NOT_POISONED(*p | 0xff0000ff);
339  EXPECT_NOT_POISONED(*p | 0xff00ffff);
340  EXPECT_NOT_POISONED(*p | 0xffff00ff);
341  EXPECT_POISONED(*p | 0xff000000);
342  EXPECT_POISONED(*p | 0x000000ff);
343  EXPECT_POISONED(*p | 0x0000ffff);
344  EXPECT_POISONED(*p | 0xffff0000);
345
346  EXPECT_POISONED(*GetPoisoned<bool>() & *GetPoisoned<bool>());
347}
348
349template<class T>
350static bool applyNot(T value, T shadow) {
351  __msan_partial_poison(&value, &shadow, sizeof(T));
352  return !value;
353}
354
355TEST(MemorySanitizer, Not) {
356  EXPECT_NOT_POISONED(applyNot<U4>(0x0, 0x0));
357  EXPECT_NOT_POISONED(applyNot<U4>(0xFFFFFFFF, 0x0));
358  EXPECT_POISONED(applyNot<U4>(0xFFFFFFFF, 0xFFFFFFFF));
359  EXPECT_NOT_POISONED(applyNot<U4>(0xFF000000, 0x0FFFFFFF));
360  EXPECT_NOT_POISONED(applyNot<U4>(0xFF000000, 0x00FFFFFF));
361  EXPECT_NOT_POISONED(applyNot<U4>(0xFF000000, 0x0000FFFF));
362  EXPECT_NOT_POISONED(applyNot<U4>(0xFF000000, 0x00000000));
363  EXPECT_POISONED(applyNot<U4>(0xFF000000, 0xFF000000));
364  EXPECT_NOT_POISONED(applyNot<U4>(0xFF800000, 0xFF000000));
365  EXPECT_POISONED(applyNot<U4>(0x00008000, 0x00008000));
366
367  EXPECT_NOT_POISONED(applyNot<U1>(0x0, 0x0));
368  EXPECT_NOT_POISONED(applyNot<U1>(0xFF, 0xFE));
369  EXPECT_NOT_POISONED(applyNot<U1>(0xFF, 0x0));
370  EXPECT_POISONED(applyNot<U1>(0xFF, 0xFF));
371
372  EXPECT_POISONED(applyNot<void*>((void*)0xFFFFFF, (void*)(-1)));
373  EXPECT_NOT_POISONED(applyNot<void*>((void*)0xFFFFFF, (void*)(-2)));
374}
375
376TEST(MemorySanitizer, Shift) {
377  U4 *up = GetPoisoned<U4>();
378  ((U1*)up)[0] = 0;
379  ((U1*)up)[3] = 0xff;
380  EXPECT_NOT_POISONED(*up >> 30);
381  EXPECT_NOT_POISONED(*up >> 24);
382  EXPECT_POISONED(*up >> 23);
383  EXPECT_POISONED(*up >> 10);
384
385  EXPECT_NOT_POISONED(*up << 30);
386  EXPECT_NOT_POISONED(*up << 24);
387  EXPECT_POISONED(*up << 23);
388  EXPECT_POISONED(*up << 10);
389
390  S4 *sp = (S4*)up;
391  EXPECT_NOT_POISONED(*sp >> 30);
392  EXPECT_NOT_POISONED(*sp >> 24);
393  EXPECT_POISONED(*sp >> 23);
394  EXPECT_POISONED(*sp >> 10);
395
396  sp = GetPoisoned<S4>();
397  ((S1*)sp)[1] = 0;
398  ((S1*)sp)[2] = 0;
399  EXPECT_POISONED(*sp >> 31);
400
401  EXPECT_POISONED(100 >> *GetPoisoned<S4>());
402  EXPECT_POISONED(100U >> *GetPoisoned<S4>());
403}
404
405NOINLINE static int GetPoisonedZero() {
406  int *zero = new int;
407  *zero = 0;
408  __msan_poison(zero, sizeof(*zero));
409  int res = *zero;
410  delete zero;
411  return res;
412}
413
414TEST(MemorySanitizer, LoadFromDirtyAddress) {
415  int *a = new int;
416  *a = 0;
417  EXPECT_UMR(break_optimization((void*)(U8)a[GetPoisonedZero()]));
418  delete a;
419}
420
421TEST(MemorySanitizer, StoreToDirtyAddress) {
422  int *a = new int;
423  EXPECT_UMR(a[GetPoisonedZero()] = 0);
424  break_optimization(a);
425  delete a;
426}
427
428
429NOINLINE void StackTestFunc() {
430  S4 p4;
431  S4 ok4 = 1;
432  S2 p2;
433  S2 ok2 = 1;
434  S1 p1;
435  S1 ok1 = 1;
436  break_optimization(&p4);
437  break_optimization(&ok4);
438  break_optimization(&p2);
439  break_optimization(&ok2);
440  break_optimization(&p1);
441  break_optimization(&ok1);
442
443  EXPECT_POISONED(p4);
444  EXPECT_POISONED(p2);
445  EXPECT_POISONED(p1);
446  EXPECT_NOT_POISONED(ok1);
447  EXPECT_NOT_POISONED(ok2);
448  EXPECT_NOT_POISONED(ok4);
449}
450
451TEST(MemorySanitizer, StackTest) {
452  StackTestFunc();
453}
454
455NOINLINE void StackStressFunc() {
456  int foo[10000];
457  break_optimization(foo);
458}
459
460TEST(MemorySanitizer, DISABLED_StackStressTest) {
461  for (int i = 0; i < 1000000; i++)
462    StackStressFunc();
463}
464
465template<class T>
466void TestFloatingPoint() {
467  static volatile T v;
468  static T g[100];
469  break_optimization(&g);
470  T *x = GetPoisoned<T>();
471  T *y = GetPoisoned<T>(1);
472  EXPECT_POISONED(*x);
473  EXPECT_POISONED((long long)*x);
474  EXPECT_POISONED((int)*x);
475  g[0] = *x;
476  g[1] = *x + *y;
477  g[2] = *x - *y;
478  g[3] = *x * *y;
479}
480
481TEST(MemorySanitizer, FloatingPointTest) {
482  TestFloatingPoint<float>();
483  TestFloatingPoint<double>();
484}
485
486TEST(MemorySanitizer, DynMem) {
487  S4 x = 0;
488  S4 *y = GetPoisoned<S4>();
489  memcpy(y, &x, g_one * sizeof(S4));
490  EXPECT_NOT_POISONED(*y);
491}
492
493static char *DynRetTestStr;
494
495TEST(MemorySanitizer, DynRet) {
496  if (!__msan_has_dynamic_component()) return;
497  ReturnPoisoned<S8>();
498  EXPECT_NOT_POISONED(clearenv());
499}
500
501
502TEST(MemorySanitizer, DynRet1) {
503  if (!__msan_has_dynamic_component()) return;
504  ReturnPoisoned<S8>();
505}
506
507struct LargeStruct {
508  S4 x[10];
509};
510
511NOINLINE
512LargeStruct LargeRetTest() {
513  LargeStruct res;
514  res.x[0] = *GetPoisoned<S4>();
515  res.x[1] = *GetPoisoned<S4>();
516  res.x[2] = *GetPoisoned<S4>();
517  res.x[3] = *GetPoisoned<S4>();
518  res.x[4] = *GetPoisoned<S4>();
519  res.x[5] = *GetPoisoned<S4>();
520  res.x[6] = *GetPoisoned<S4>();
521  res.x[7] = *GetPoisoned<S4>();
522  res.x[8] = *GetPoisoned<S4>();
523  res.x[9] = *GetPoisoned<S4>();
524  return res;
525}
526
527TEST(MemorySanitizer, strcmp) {
528  char s1[10];
529  char s2[10];
530  strncpy(s1, "foo", 10);
531  s2[0] = 'f';
532  s2[1] = 'n';
533  EXPECT_GT(strcmp(s1, s2), 0);
534  s2[1] = 'o';
535  int res;
536  EXPECT_UMR(res = strcmp(s1, s2));
537  EXPECT_NOT_POISONED(res);
538  EXPECT_EQ(strncmp(s1, s2, 1), 0);
539}
540
541TEST(MemorySanitizer, LargeRet) {
542  LargeStruct a = LargeRetTest();
543  EXPECT_POISONED(a.x[0]);
544  EXPECT_POISONED(a.x[9]);
545}
546
547TEST(MemorySanitizer, fread) {
548  char *x = new char[32];
549  FILE *f = fopen("/proc/self/stat", "r");
550  assert(f);
551  fread(x, 1, 32, f);
552  EXPECT_NOT_POISONED(x[0]);
553  EXPECT_NOT_POISONED(x[16]);
554  EXPECT_NOT_POISONED(x[31]);
555  fclose(f);
556  delete x;
557}
558
559TEST(MemorySanitizer, read) {
560  char *x = new char[32];
561  int fd = open("/proc/self/stat", O_RDONLY);
562  assert(fd > 0);
563  int sz = read(fd, x, 32);
564  assert(sz == 32);
565  EXPECT_NOT_POISONED(x[0]);
566  EXPECT_NOT_POISONED(x[16]);
567  EXPECT_NOT_POISONED(x[31]);
568  close(fd);
569  delete x;
570}
571
572TEST(MemorySanitizer, pread) {
573  char *x = new char[32];
574  int fd = open("/proc/self/stat", O_RDONLY);
575  assert(fd > 0);
576  int sz = pread(fd, x, 32, 0);
577  assert(sz == 32);
578  EXPECT_NOT_POISONED(x[0]);
579  EXPECT_NOT_POISONED(x[16]);
580  EXPECT_NOT_POISONED(x[31]);
581  close(fd);
582  delete x;
583}
584
585TEST(MemorySanitizer, readv) {
586  char buf[2011];
587  struct iovec iov[2];
588  iov[0].iov_base = buf + 1;
589  iov[0].iov_len = 5;
590  iov[1].iov_base = buf + 10;
591  iov[1].iov_len = 2000;
592  int fd = open("/proc/self/stat", O_RDONLY);
593  assert(fd > 0);
594  int sz = readv(fd, iov, 2);
595  ASSERT_LT(sz, 5 + 2000);
596  ASSERT_GT(sz, iov[0].iov_len);
597  EXPECT_POISONED(buf[0]);
598  EXPECT_NOT_POISONED(buf[1]);
599  EXPECT_NOT_POISONED(buf[5]);
600  EXPECT_POISONED(buf[6]);
601  EXPECT_POISONED(buf[9]);
602  EXPECT_NOT_POISONED(buf[10]);
603  EXPECT_NOT_POISONED(buf[10 + (sz - 1) - 5]);
604  EXPECT_POISONED(buf[11 + (sz - 1) - 5]);
605  close(fd);
606}
607
608TEST(MemorySanitizer, preadv) {
609  char buf[2011];
610  struct iovec iov[2];
611  iov[0].iov_base = buf + 1;
612  iov[0].iov_len = 5;
613  iov[1].iov_base = buf + 10;
614  iov[1].iov_len = 2000;
615  int fd = open("/proc/self/stat", O_RDONLY);
616  assert(fd > 0);
617  int sz = preadv(fd, iov, 2, 3);
618  ASSERT_LT(sz, 5 + 2000);
619  ASSERT_GT(sz, iov[0].iov_len);
620  EXPECT_POISONED(buf[0]);
621  EXPECT_NOT_POISONED(buf[1]);
622  EXPECT_NOT_POISONED(buf[5]);
623  EXPECT_POISONED(buf[6]);
624  EXPECT_POISONED(buf[9]);
625  EXPECT_NOT_POISONED(buf[10]);
626  EXPECT_NOT_POISONED(buf[10 + (sz - 1) - 5]);
627  EXPECT_POISONED(buf[11 + (sz - 1) - 5]);
628  close(fd);
629}
630
631// FIXME: fails now.
632TEST(MemorySanitizer, DISABLED_ioctl) {
633  struct winsize ws;
634  EXPECT_EQ(ioctl(2, TIOCGWINSZ, &ws), 0);
635  EXPECT_NOT_POISONED(ws.ws_col);
636}
637
638TEST(MemorySanitizer, readlink) {
639  char *x = new char[1000];
640  readlink("/proc/self/exe", x, 1000);
641  EXPECT_NOT_POISONED(x[0]);
642  delete [] x;
643}
644
645
646TEST(MemorySanitizer, stat) {
647  struct stat* st = new struct stat;
648  int res = stat("/proc/self/stat", st);
649  assert(!res);
650  EXPECT_NOT_POISONED(st->st_dev);
651  EXPECT_NOT_POISONED(st->st_mode);
652  EXPECT_NOT_POISONED(st->st_size);
653}
654
655TEST(MemorySanitizer, statfs) {
656  struct statfs* st = new struct statfs;
657  int res = statfs("/", st);
658  assert(!res);
659  EXPECT_NOT_POISONED(st->f_type);
660  EXPECT_NOT_POISONED(st->f_bfree);
661  EXPECT_NOT_POISONED(st->f_namelen);
662}
663
664TEST(MemorySanitizer, pipe) {
665  int* pipefd = new int[2];
666  int res = pipe(pipefd);
667  assert(!res);
668  EXPECT_NOT_POISONED(pipefd[0]);
669  EXPECT_NOT_POISONED(pipefd[1]);
670  close(pipefd[0]);
671  close(pipefd[1]);
672}
673
674TEST(MemorySanitizer, pipe2) {
675  int* pipefd = new int[2];
676  int res = pipe2(pipefd, O_NONBLOCK);
677  assert(!res);
678  EXPECT_NOT_POISONED(pipefd[0]);
679  EXPECT_NOT_POISONED(pipefd[1]);
680  close(pipefd[0]);
681  close(pipefd[1]);
682}
683
684TEST(MemorySanitizer, socketpair) {
685  int sv[2];
686  int res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
687  assert(!res);
688  EXPECT_NOT_POISONED(sv[0]);
689  EXPECT_NOT_POISONED(sv[1]);
690  close(sv[0]);
691  close(sv[1]);
692}
693
694TEST(MemorySanitizer, bind_getsockname) {
695  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
696
697  struct sockaddr_in sai;
698  memset(&sai, 0, sizeof(sai));
699  sai.sin_family = AF_UNIX;
700  int res = bind(sock, (struct sockaddr *)&sai, sizeof(sai));
701
702  assert(!res);
703  char buf[200];
704  socklen_t addrlen;
705  EXPECT_UMR(getsockname(sock, (struct sockaddr *)&buf, &addrlen));
706
707  addrlen = sizeof(buf);
708  res = getsockname(sock, (struct sockaddr *)&buf, &addrlen);
709  EXPECT_NOT_POISONED(addrlen);
710  EXPECT_NOT_POISONED(buf[0]);
711  EXPECT_NOT_POISONED(buf[addrlen - 1]);
712  EXPECT_POISONED(buf[addrlen]);
713  close(sock);
714}
715
716TEST(MemorySanitizer, accept) {
717  int listen_socket = socket(AF_INET, SOCK_STREAM, 0);
718  ASSERT_LT(0, listen_socket);
719
720  struct sockaddr_in sai;
721  sai.sin_family = AF_INET;
722  sai.sin_port = 0;
723  sai.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
724  int res = bind(listen_socket, (struct sockaddr *)&sai, sizeof(sai));
725  ASSERT_EQ(0, res);
726
727  res = listen(listen_socket, 1);
728  ASSERT_EQ(0, res);
729
730  socklen_t sz = sizeof(sai);
731  res = getsockname(listen_socket, (struct sockaddr *)&sai, &sz);
732  ASSERT_EQ(0, res);
733  ASSERT_EQ(sizeof(sai), sz);
734
735  int connect_socket = socket(AF_INET, SOCK_STREAM, 0);
736  ASSERT_LT(0, connect_socket);
737  res = fcntl(connect_socket, F_SETFL, O_NONBLOCK);
738  ASSERT_EQ(0, res);
739  res = connect(connect_socket, (struct sockaddr *)&sai, sizeof(sai));
740  ASSERT_EQ(-1, res);
741  ASSERT_EQ(EINPROGRESS, errno);
742
743  __msan_poison(&sai, sizeof(sai));
744  int new_sock = accept(listen_socket, (struct sockaddr *)&sai, &sz);
745  ASSERT_LT(0, new_sock);
746  ASSERT_EQ(sizeof(sai), sz);
747  EXPECT_NOT_POISONED(sai);
748
749  __msan_poison(&sai, sizeof(sai));
750  res = getpeername(new_sock, (struct sockaddr *)&sai, &sz);
751  ASSERT_EQ(0, res);
752  ASSERT_EQ(sizeof(sai), sz);
753  EXPECT_NOT_POISONED(sai);
754
755  close(new_sock);
756  close(connect_socket);
757  close(listen_socket);
758}
759
760TEST(MemorySanitizer, getaddrinfo) {
761  struct addrinfo *ai;
762  struct addrinfo hints;
763  memset(&hints, 0, sizeof(hints));
764  hints.ai_family = AF_INET;
765  int res = getaddrinfo("localhost", NULL, &hints, &ai);
766  ASSERT_EQ(0, res);
767  EXPECT_NOT_POISONED(*ai);
768  ASSERT_EQ(sizeof(sockaddr_in), ai->ai_addrlen);
769  EXPECT_NOT_POISONED(*(sockaddr_in*)ai->ai_addr);
770}
771
772TEST(MemorySanitizer, getnameinfo) {
773  struct sockaddr_in sai;
774  sai.sin_family = AF_INET;
775  sai.sin_port = 80;
776  sai.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
777  char host[500];
778  char serv[500];
779  int res = getnameinfo((struct sockaddr *)&sai, sizeof(sai), host,
780                        sizeof(host), serv, sizeof(serv), 0);
781  ASSERT_EQ(0, res);
782  EXPECT_NOT_POISONED(host[0]);
783  EXPECT_POISONED(host[sizeof(host) - 1]);
784
785  ASSERT_NE(0, strlen(host));
786  EXPECT_NOT_POISONED(serv[0]);
787  EXPECT_POISONED(serv[sizeof(serv) - 1]);
788  ASSERT_NE(0, strlen(serv));
789}
790
791#define EXPECT_HOSTENT_NOT_POISONED(he)        \
792  do {                                         \
793    EXPECT_NOT_POISONED(*(he));                \
794    ASSERT_NE((void *) 0, (he)->h_name);       \
795    ASSERT_NE((void *) 0, (he)->h_aliases);    \
796    ASSERT_NE((void *) 0, (he)->h_addr_list);  \
797    EXPECT_NOT_POISONED(strlen((he)->h_name)); \
798    char **p = (he)->h_aliases;                \
799    while (*p) {                               \
800      EXPECT_NOT_POISONED(strlen(*p));         \
801      ++p;                                     \
802    }                                          \
803    char **q = (he)->h_addr_list;              \
804    while (*q) {                               \
805      EXPECT_NOT_POISONED(*q[0]);              \
806      ++q;                                     \
807    }                                          \
808    EXPECT_NOT_POISONED(*q);                   \
809  } while (0)
810
811TEST(MemorySanitizer, gethostent) {
812  struct hostent *he = gethostent();
813  ASSERT_NE((void *)NULL, he);
814  EXPECT_HOSTENT_NOT_POISONED(he);
815}
816
817#ifndef MSAN_TEST_DISABLE_GETHOSTBYNAME
818
819TEST(MemorySanitizer, gethostbyname) {
820  struct hostent *he = gethostbyname("localhost");
821  ASSERT_NE((void *)NULL, he);
822  EXPECT_HOSTENT_NOT_POISONED(he);
823}
824
825#endif // MSAN_TEST_DISABLE_GETHOSTBYNAME
826
827TEST(MemorySanitizer, gethostbyname2) {
828  struct hostent *he = gethostbyname2("localhost", AF_INET);
829  ASSERT_NE((void *)NULL, he);
830  EXPECT_HOSTENT_NOT_POISONED(he);
831}
832
833TEST(MemorySanitizer, gethostbyaddr) {
834  in_addr_t addr = inet_addr("127.0.0.1");
835  EXPECT_NOT_POISONED(addr);
836  struct hostent *he = gethostbyaddr(&addr, sizeof(addr), AF_INET);
837  ASSERT_NE((void *)NULL, he);
838  EXPECT_HOSTENT_NOT_POISONED(he);
839}
840
841TEST(MemorySanitizer, gethostent_r) {
842  char buf[2000];
843  struct hostent he;
844  struct hostent *result;
845  int err;
846  int res = gethostent_r(&he, buf, sizeof(buf), &result, &err);
847  ASSERT_EQ(0, res);
848  EXPECT_NOT_POISONED(result);
849  ASSERT_NE((void *)NULL, result);
850  EXPECT_HOSTENT_NOT_POISONED(result);
851  EXPECT_NOT_POISONED(err);
852}
853
854TEST(MemorySanitizer, gethostbyname_r) {
855  char buf[2000];
856  struct hostent he;
857  struct hostent *result;
858  int err;
859  int res = gethostbyname_r("localhost", &he, buf, sizeof(buf), &result, &err);
860  ASSERT_EQ(0, res);
861  EXPECT_NOT_POISONED(result);
862  ASSERT_NE((void *)NULL, result);
863  EXPECT_HOSTENT_NOT_POISONED(result);
864  EXPECT_NOT_POISONED(err);
865}
866
867TEST(MemorySanitizer, gethostbyname2_r) {
868  char buf[2000];
869  struct hostent he;
870  struct hostent *result;
871  int err;
872  int res = gethostbyname2_r("localhost", AF_INET, &he, buf, sizeof(buf),
873                             &result, &err);
874  ASSERT_EQ(0, res);
875  EXPECT_NOT_POISONED(result);
876  ASSERT_NE((void *)NULL, result);
877  EXPECT_HOSTENT_NOT_POISONED(result);
878  EXPECT_NOT_POISONED(err);
879}
880
881TEST(MemorySanitizer, gethostbyaddr_r) {
882  char buf[2000];
883  struct hostent he;
884  struct hostent *result;
885  int err;
886  in_addr_t addr = inet_addr("127.0.0.1");
887  EXPECT_NOT_POISONED(addr);
888  int res = gethostbyaddr_r(&addr, sizeof(addr), AF_INET, &he, buf, sizeof(buf),
889                            &result, &err);
890  ASSERT_EQ(0, res);
891  EXPECT_NOT_POISONED(result);
892  ASSERT_NE((void *)NULL, result);
893  EXPECT_HOSTENT_NOT_POISONED(result);
894  EXPECT_NOT_POISONED(err);
895}
896
897TEST(MemorySanitizer, getsockopt) {
898  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
899  struct linger l[2];
900  socklen_t sz = sizeof(l[0]);
901  int res = getsockopt(sock, SOL_SOCKET, SO_LINGER, &l[0], &sz);
902  ASSERT_EQ(0, res);
903  ASSERT_EQ(sizeof(l[0]), sz);
904  EXPECT_NOT_POISONED(l[0]);
905  EXPECT_POISONED(*(char *)(l + 1));
906}
907
908TEST(MemorySanitizer, getcwd) {
909  char path[PATH_MAX + 1];
910  char* res = getcwd(path, sizeof(path));
911  assert(res);
912  EXPECT_NOT_POISONED(path[0]);
913}
914
915TEST(MemorySanitizer, getcwd_gnu) {
916  char* res = getcwd(NULL, 0);
917  assert(res);
918  EXPECT_NOT_POISONED(res[0]);
919  free(res);
920}
921
922TEST(MemorySanitizer, get_current_dir_name) {
923  char* res = get_current_dir_name();
924  assert(res);
925  EXPECT_NOT_POISONED(res[0]);
926  free(res);
927}
928
929TEST(MemorySanitizer, confstr) {
930  char buf[3];
931  size_t res = confstr(_CS_PATH, buf, sizeof(buf));
932  ASSERT_GT(res, sizeof(buf));
933  EXPECT_NOT_POISONED(buf[0]);
934  EXPECT_NOT_POISONED(buf[sizeof(buf) - 1]);
935
936  char buf2[1000];
937  res = confstr(_CS_PATH, buf2, sizeof(buf2));
938  ASSERT_LT(res, sizeof(buf2));
939  EXPECT_NOT_POISONED(buf2[0]);
940  EXPECT_NOT_POISONED(buf2[res - 1]);
941  EXPECT_POISONED(buf2[res]);
942  ASSERT_EQ(res, strlen(buf2) + 1);
943}
944
945TEST(MemorySanitizer, readdir) {
946  DIR *dir = opendir(".");
947  struct dirent *d = readdir(dir);
948  assert(d);
949  EXPECT_NOT_POISONED(d->d_name[0]);
950  closedir(dir);
951}
952
953TEST(MemorySanitizer, readdir_r) {
954  DIR *dir = opendir(".");
955  struct dirent d;
956  struct dirent *pd;
957  int res = readdir_r(dir, &d, &pd);
958  assert(!res);
959  EXPECT_NOT_POISONED(pd);
960  EXPECT_NOT_POISONED(d.d_name[0]);
961  closedir(dir);
962}
963
964TEST(MemorySanitizer, realpath) {
965  const char* relpath = ".";
966  char path[PATH_MAX + 1];
967  char* res = realpath(relpath, path);
968  assert(res);
969  EXPECT_NOT_POISONED(path[0]);
970}
971
972TEST(MemorySanitizer, realpath_null) {
973  const char* relpath = ".";
974  char* res = realpath(relpath, NULL);
975  printf("%d, %s\n", errno, strerror(errno));
976  assert(res);
977  EXPECT_NOT_POISONED(res[0]);
978  free(res);
979}
980
981TEST(MemorySanitizer, canonicalize_file_name) {
982  const char* relpath = ".";
983  char* res = canonicalize_file_name(relpath);
984  assert(res);
985  EXPECT_NOT_POISONED(res[0]);
986  free(res);
987}
988
989TEST(MemorySanitizer, memcpy) {
990  char* x = new char[2];
991  char* y = new char[2];
992  x[0] = 1;
993  x[1] = *GetPoisoned<char>();
994  memcpy(y, x, 2);
995  EXPECT_NOT_POISONED(y[0]);
996  EXPECT_POISONED(y[1]);
997}
998
999TEST(MemorySanitizer, memmove) {
1000  char* x = new char[2];
1001  char* y = new char[2];
1002  x[0] = 1;
1003  x[1] = *GetPoisoned<char>();
1004  memmove(y, x, 2);
1005  EXPECT_NOT_POISONED(y[0]);
1006  EXPECT_POISONED(y[1]);
1007}
1008
1009TEST(MemorySanitizer, bcopy) {
1010  char* x = new char[2];
1011  char* y = new char[2];
1012  x[0] = 1;
1013  x[1] = *GetPoisoned<char>();
1014  bcopy(x, y, 2);
1015  EXPECT_NOT_POISONED(y[0]);
1016  EXPECT_POISONED(y[1]);
1017}
1018
1019TEST(MemorySanitizer, strdup) {
1020  char buf[4] = "abc";
1021  __msan_poison(buf + 2, sizeof(*buf));
1022  char *x = strdup(buf);
1023  EXPECT_NOT_POISONED(x[0]);
1024  EXPECT_NOT_POISONED(x[1]);
1025  EXPECT_POISONED(x[2]);
1026  EXPECT_NOT_POISONED(x[3]);
1027  free(x);
1028}
1029
1030TEST(MemorySanitizer, strndup) {
1031  char buf[4] = "abc";
1032  __msan_poison(buf + 2, sizeof(*buf));
1033  char *x = strndup(buf, 3);
1034  EXPECT_NOT_POISONED(x[0]);
1035  EXPECT_NOT_POISONED(x[1]);
1036  EXPECT_POISONED(x[2]);
1037  EXPECT_NOT_POISONED(x[3]);
1038  free(x);
1039}
1040
1041TEST(MemorySanitizer, strndup_short) {
1042  char buf[4] = "abc";
1043  __msan_poison(buf + 1, sizeof(*buf));
1044  __msan_poison(buf + 2, sizeof(*buf));
1045  char *x = strndup(buf, 2);
1046  EXPECT_NOT_POISONED(x[0]);
1047  EXPECT_POISONED(x[1]);
1048  EXPECT_NOT_POISONED(x[2]);
1049  free(x);
1050}
1051
1052
1053template<class T, int size>
1054void TestOverlapMemmove() {
1055  T *x = new T[size];
1056  assert(size >= 3);
1057  x[2] = 0;
1058  memmove(x, x + 1, (size - 1) * sizeof(T));
1059  EXPECT_NOT_POISONED(x[1]);
1060  if (!__msan_has_dynamic_component()) {
1061    // FIXME: under DR we will lose this information
1062    // because accesses in memmove will unpoisin the shadow.
1063    // We need to use our own memove implementation instead of libc's.
1064    EXPECT_POISONED(x[0]);
1065    EXPECT_POISONED(x[2]);
1066  }
1067  delete [] x;
1068}
1069
1070TEST(MemorySanitizer, overlap_memmove) {
1071  TestOverlapMemmove<U1, 10>();
1072  TestOverlapMemmove<U1, 1000>();
1073  TestOverlapMemmove<U8, 4>();
1074  TestOverlapMemmove<U8, 1000>();
1075}
1076
1077TEST(MemorySanitizer, strcpy) {  // NOLINT
1078  char* x = new char[3];
1079  char* y = new char[3];
1080  x[0] = 'a';
1081  x[1] = *GetPoisoned<char>(1, 1);
1082  x[2] = 0;
1083  strcpy(y, x);  // NOLINT
1084  EXPECT_NOT_POISONED(y[0]);
1085  EXPECT_POISONED(y[1]);
1086  EXPECT_NOT_POISONED(y[2]);
1087}
1088
1089TEST(MemorySanitizer, strncpy) {  // NOLINT
1090  char* x = new char[3];
1091  char* y = new char[3];
1092  x[0] = 'a';
1093  x[1] = *GetPoisoned<char>(1, 1);
1094  x[2] = 0;
1095  strncpy(y, x, 2);  // NOLINT
1096  EXPECT_NOT_POISONED(y[0]);
1097  EXPECT_POISONED(y[1]);
1098  EXPECT_POISONED(y[2]);
1099}
1100
1101TEST(MemorySanitizer, stpcpy) {  // NOLINT
1102  char* x = new char[3];
1103  char* y = new char[3];
1104  x[0] = 'a';
1105  x[1] = *GetPoisoned<char>(1, 1);
1106  x[2] = 0;
1107  char *res = stpcpy(y, x);  // NOLINT
1108  ASSERT_EQ(res, y + 2);
1109  EXPECT_NOT_POISONED(y[0]);
1110  EXPECT_POISONED(y[1]);
1111  EXPECT_NOT_POISONED(y[2]);
1112}
1113
1114TEST(MemorySanitizer, strtol) {
1115  char *e;
1116  assert(1 == strtol("1", &e, 10));
1117  EXPECT_NOT_POISONED((S8) e);
1118}
1119
1120TEST(MemorySanitizer, strtoll) {
1121  char *e;
1122  assert(1 == strtoll("1", &e, 10));
1123  EXPECT_NOT_POISONED((S8) e);
1124}
1125
1126TEST(MemorySanitizer, strtoul) {
1127  char *e;
1128  assert(1 == strtoul("1", &e, 10));
1129  EXPECT_NOT_POISONED((S8) e);
1130}
1131
1132TEST(MemorySanitizer, strtoull) {
1133  char *e;
1134  assert(1 == strtoull("1", &e, 10));
1135  EXPECT_NOT_POISONED((S8) e);
1136}
1137
1138TEST(MemorySanitizer, strtoimax) {
1139  char *e;
1140  assert(1 == strtoimax("1", &e, 10));
1141  EXPECT_NOT_POISONED((S8) e);
1142}
1143
1144TEST(MemorySanitizer, strtoumax) {
1145  char *e;
1146  assert(1 == strtoumax("1", &e, 10));
1147  EXPECT_NOT_POISONED((S8) e);
1148}
1149
1150TEST(MemorySanitizer, strtod) {
1151  char *e;
1152  assert(0 != strtod("1.5", &e));
1153  EXPECT_NOT_POISONED((S8) e);
1154}
1155
1156TEST(MemorySanitizer, strtof) {
1157  char *e;
1158  assert(0 != strtof("1.5", &e));
1159  EXPECT_NOT_POISONED((S8) e);
1160}
1161
1162TEST(MemorySanitizer, strtold) {
1163  char *e;
1164  assert(0 != strtold("1.5", &e));
1165  EXPECT_NOT_POISONED((S8) e);
1166}
1167
1168TEST(MemorySanitizer, modf) {
1169  double x, y;
1170  x = modf(2.1, &y);
1171  EXPECT_NOT_POISONED(y);
1172}
1173
1174TEST(MemorySanitizer, modff) {
1175  float x, y;
1176  x = modff(2.1, &y);
1177  EXPECT_NOT_POISONED(y);
1178}
1179
1180TEST(MemorySanitizer, modfl) {
1181  long double x, y;
1182  x = modfl(2.1, &y);
1183  EXPECT_NOT_POISONED(y);
1184}
1185
1186TEST(MemorySanitizer, sprintf) {  // NOLINT
1187  char buff[10];
1188  break_optimization(buff);
1189  EXPECT_POISONED(buff[0]);
1190  int res = sprintf(buff, "%d", 1234567);  // NOLINT
1191  assert(res == 7);
1192  assert(buff[0] == '1');
1193  assert(buff[1] == '2');
1194  assert(buff[2] == '3');
1195  assert(buff[6] == '7');
1196  assert(buff[7] == 0);
1197  EXPECT_POISONED(buff[8]);
1198}
1199
1200TEST(MemorySanitizer, snprintf) {
1201  char buff[10];
1202  break_optimization(buff);
1203  EXPECT_POISONED(buff[0]);
1204  int res = snprintf(buff, sizeof(buff), "%d", 1234567);
1205  assert(res == 7);
1206  assert(buff[0] == '1');
1207  assert(buff[1] == '2');
1208  assert(buff[2] == '3');
1209  assert(buff[6] == '7');
1210  assert(buff[7] == 0);
1211  EXPECT_POISONED(buff[8]);
1212}
1213
1214TEST(MemorySanitizer, swprintf) {
1215  wchar_t buff[10];
1216  assert(sizeof(wchar_t) == 4);
1217  break_optimization(buff);
1218  EXPECT_POISONED(buff[0]);
1219  int res = swprintf(buff, 9, L"%d", 1234567);
1220  assert(res == 7);
1221  assert(buff[0] == '1');
1222  assert(buff[1] == '2');
1223  assert(buff[2] == '3');
1224  assert(buff[6] == '7');
1225  assert(buff[7] == 0);
1226  EXPECT_POISONED(buff[8]);
1227}
1228
1229TEST(MemorySanitizer, asprintf) {  // NOLINT
1230  char *pbuf;
1231  EXPECT_POISONED(pbuf);
1232  int res = asprintf(&pbuf, "%d", 1234567);  // NOLINT
1233  assert(res == 7);
1234  EXPECT_NOT_POISONED(pbuf);
1235  assert(pbuf[0] == '1');
1236  assert(pbuf[1] == '2');
1237  assert(pbuf[2] == '3');
1238  assert(pbuf[6] == '7');
1239  assert(pbuf[7] == 0);
1240  free(pbuf);
1241}
1242
1243TEST(MemorySanitizer, mbstowcs) {
1244  const char *x = "abc";
1245  wchar_t buff[10];
1246  int res = mbstowcs(buff, x, 2);
1247  EXPECT_EQ(2, res);
1248  EXPECT_EQ(L'a', buff[0]);
1249  EXPECT_EQ(L'b', buff[1]);
1250  EXPECT_POISONED(buff[2]);
1251  res = mbstowcs(buff, x, 10);
1252  EXPECT_EQ(3, res);
1253  EXPECT_NOT_POISONED(buff[3]);
1254}
1255
1256TEST(MemorySanitizer, wcstombs) {
1257  const wchar_t *x = L"abc";
1258  char buff[10];
1259  int res = wcstombs(buff, x, 4);
1260  EXPECT_EQ(res, 3);
1261  EXPECT_EQ(buff[0], 'a');
1262  EXPECT_EQ(buff[1], 'b');
1263  EXPECT_EQ(buff[2], 'c');
1264}
1265
1266TEST(MemorySanitizer, wcsrtombs) {
1267  const wchar_t *x = L"abc";
1268  const wchar_t *p = x;
1269  char buff[10];
1270  mbstate_t mbs;
1271  memset(&mbs, 0, sizeof(mbs));
1272  int res = wcsrtombs(buff, &p, 4, &mbs);
1273  EXPECT_EQ(res, 3);
1274  EXPECT_EQ(buff[0], 'a');
1275  EXPECT_EQ(buff[1], 'b');
1276  EXPECT_EQ(buff[2], 'c');
1277  EXPECT_EQ(buff[3], '\0');
1278  EXPECT_POISONED(buff[4]);
1279}
1280
1281TEST(MemorySanitizer, wcsnrtombs) {
1282  const wchar_t *x = L"abc";
1283  const wchar_t *p = x;
1284  char buff[10];
1285  mbstate_t mbs;
1286  memset(&mbs, 0, sizeof(mbs));
1287  int res = wcsnrtombs(buff, &p, 2, 4, &mbs);
1288  EXPECT_EQ(res, 2);
1289  EXPECT_EQ(buff[0], 'a');
1290  EXPECT_EQ(buff[1], 'b');
1291  EXPECT_POISONED(buff[2]);
1292}
1293
1294TEST(MemorySanitizer, mbtowc) {
1295  const char *x = "abc";
1296  wchar_t wx;
1297  int res = mbtowc(&wx, x, 3);
1298  EXPECT_GT(res, 0);
1299  EXPECT_NOT_POISONED(wx);
1300}
1301
1302TEST(MemorySanitizer, mbrtowc) {
1303  const char *x = "abc";
1304  wchar_t wx;
1305  mbstate_t mbs;
1306  memset(&mbs, 0, sizeof(mbs));
1307  int res = mbrtowc(&wx, x, 3, &mbs);
1308  EXPECT_GT(res, 0);
1309  EXPECT_NOT_POISONED(wx);
1310}
1311
1312TEST(MemorySanitizer, gettimeofday) {
1313  struct timeval tv;
1314  struct timezone tz;
1315  break_optimization(&tv);
1316  break_optimization(&tz);
1317  assert(sizeof(tv) == 16);
1318  assert(sizeof(tz) == 8);
1319  EXPECT_POISONED(tv.tv_sec);
1320  EXPECT_POISONED(tv.tv_usec);
1321  EXPECT_POISONED(tz.tz_minuteswest);
1322  EXPECT_POISONED(tz.tz_dsttime);
1323  assert(0 == gettimeofday(&tv, &tz));
1324  EXPECT_NOT_POISONED(tv.tv_sec);
1325  EXPECT_NOT_POISONED(tv.tv_usec);
1326  EXPECT_NOT_POISONED(tz.tz_minuteswest);
1327  EXPECT_NOT_POISONED(tz.tz_dsttime);
1328}
1329
1330TEST(MemorySanitizer, clock_gettime) {
1331  struct timespec tp;
1332  EXPECT_POISONED(tp.tv_sec);
1333  EXPECT_POISONED(tp.tv_nsec);
1334  assert(0 == clock_gettime(CLOCK_REALTIME, &tp));
1335  EXPECT_NOT_POISONED(tp.tv_sec);
1336  EXPECT_NOT_POISONED(tp.tv_nsec);
1337}
1338
1339TEST(MemorySanitizer, clock_getres) {
1340  struct timespec tp;
1341  EXPECT_POISONED(tp.tv_sec);
1342  EXPECT_POISONED(tp.tv_nsec);
1343  assert(0 == clock_getres(CLOCK_REALTIME, 0));
1344  EXPECT_POISONED(tp.tv_sec);
1345  EXPECT_POISONED(tp.tv_nsec);
1346  assert(0 == clock_getres(CLOCK_REALTIME, &tp));
1347  EXPECT_NOT_POISONED(tp.tv_sec);
1348  EXPECT_NOT_POISONED(tp.tv_nsec);
1349}
1350
1351TEST(MemorySanitizer, getitimer) {
1352  struct itimerval it1, it2;
1353  int res;
1354  EXPECT_POISONED(it1.it_interval.tv_sec);
1355  EXPECT_POISONED(it1.it_interval.tv_usec);
1356  EXPECT_POISONED(it1.it_value.tv_sec);
1357  EXPECT_POISONED(it1.it_value.tv_usec);
1358  res = getitimer(ITIMER_VIRTUAL, &it1);
1359  assert(!res);
1360  EXPECT_NOT_POISONED(it1.it_interval.tv_sec);
1361  EXPECT_NOT_POISONED(it1.it_interval.tv_usec);
1362  EXPECT_NOT_POISONED(it1.it_value.tv_sec);
1363  EXPECT_NOT_POISONED(it1.it_value.tv_usec);
1364
1365  it1.it_interval.tv_sec = it1.it_value.tv_sec = 10000;
1366  it1.it_interval.tv_usec = it1.it_value.tv_usec = 0;
1367
1368  res = setitimer(ITIMER_VIRTUAL, &it1, &it2);
1369  assert(!res);
1370  EXPECT_NOT_POISONED(it2.it_interval.tv_sec);
1371  EXPECT_NOT_POISONED(it2.it_interval.tv_usec);
1372  EXPECT_NOT_POISONED(it2.it_value.tv_sec);
1373  EXPECT_NOT_POISONED(it2.it_value.tv_usec);
1374
1375  // Check that old_value can be 0, and disable the timer.
1376  memset(&it1, 0, sizeof(it1));
1377  res = setitimer(ITIMER_VIRTUAL, &it1, 0);
1378  assert(!res);
1379}
1380
1381TEST(MemorySanitizer, time) {
1382  time_t t;
1383  EXPECT_POISONED(t);
1384  time_t t2 = time(&t);
1385  assert(t2 != (time_t)-1);
1386  EXPECT_NOT_POISONED(t);
1387}
1388
1389TEST(MemorySanitizer, localtime) {
1390  time_t t = 123;
1391  struct tm *time = localtime(&t);
1392  assert(time != 0);
1393  EXPECT_NOT_POISONED(time->tm_sec);
1394  EXPECT_NOT_POISONED(time->tm_hour);
1395  EXPECT_NOT_POISONED(time->tm_year);
1396  EXPECT_NOT_POISONED(time->tm_isdst);
1397}
1398
1399TEST(MemorySanitizer, localtime_r) {
1400  time_t t = 123;
1401  struct tm time;
1402  struct tm *res = localtime_r(&t, &time);
1403  assert(res != 0);
1404  EXPECT_NOT_POISONED(time.tm_sec);
1405  EXPECT_NOT_POISONED(time.tm_hour);
1406  EXPECT_NOT_POISONED(time.tm_year);
1407  EXPECT_NOT_POISONED(time.tm_isdst);
1408}
1409
1410TEST(MemorySanitizer, mmap) {
1411  const int size = 4096;
1412  void *p1, *p2;
1413  p1 = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
1414  __msan_poison(p1, size);
1415  munmap(p1, size);
1416  for (int i = 0; i < 1000; i++) {
1417    p2 = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
1418    if (p2 == p1)
1419      break;
1420    else
1421      munmap(p2, size);
1422  }
1423  if (p1 == p2) {
1424    EXPECT_NOT_POISONED(*(char*)p2);
1425    munmap(p2, size);
1426  }
1427}
1428
1429// FIXME: enable and add ecvt.
1430// FIXME: check why msandr does nt handle fcvt.
1431TEST(MemorySanitizer, fcvt) {
1432  int a, b;
1433  break_optimization(&a);
1434  break_optimization(&b);
1435  EXPECT_POISONED(a);
1436  EXPECT_POISONED(b);
1437  char *str = fcvt(12345.6789, 10, &a, &b);
1438  EXPECT_NOT_POISONED(a);
1439  EXPECT_NOT_POISONED(b);
1440}
1441
1442TEST(MemorySanitizer, frexp) {
1443  int x;
1444  x = *GetPoisoned<int>();
1445  double r = frexp(1.1, &x);
1446  EXPECT_NOT_POISONED(r);
1447  EXPECT_NOT_POISONED(x);
1448
1449  x = *GetPoisoned<int>();
1450  float rf = frexpf(1.1, &x);
1451  EXPECT_NOT_POISONED(rf);
1452  EXPECT_NOT_POISONED(x);
1453
1454  x = *GetPoisoned<int>();
1455  double rl = frexpl(1.1, &x);
1456  EXPECT_NOT_POISONED(rl);
1457  EXPECT_NOT_POISONED(x);
1458}
1459
1460namespace {
1461
1462static int cnt;
1463
1464void SigactionHandler(int signo, siginfo_t* si, void* uc) {
1465  assert(signo == SIGPROF);
1466  assert(si);
1467  EXPECT_NOT_POISONED(si->si_errno);
1468  EXPECT_NOT_POISONED(si->si_pid);
1469#if __linux__
1470# if defined(__x86_64__)
1471  EXPECT_NOT_POISONED(((ucontext_t*)uc)->uc_mcontext.gregs[REG_RIP]);
1472# elif defined(__i386__)
1473  EXPECT_NOT_POISONED(((ucontext_t*)uc)->uc_mcontext.gregs[REG_EIP]);
1474# endif
1475#endif
1476  ++cnt;
1477}
1478
1479TEST(MemorySanitizer, sigaction) {
1480  struct sigaction act = {};
1481  struct sigaction oldact = {};
1482  struct sigaction origact = {};
1483
1484  sigaction(SIGPROF, 0, &origact);
1485
1486  act.sa_flags |= SA_SIGINFO;
1487  act.sa_sigaction = &SigactionHandler;
1488  sigaction(SIGPROF, &act, 0);
1489
1490  kill(getpid(), SIGPROF);
1491
1492  act.sa_flags &= ~SA_SIGINFO;
1493  act.sa_handler = SIG_DFL;
1494  sigaction(SIGPROF, &act, 0);
1495
1496  act.sa_flags &= ~SA_SIGINFO;
1497  act.sa_handler = SIG_IGN;
1498  sigaction(SIGPROF, &act, &oldact);
1499  EXPECT_FALSE(oldact.sa_flags & SA_SIGINFO);
1500  EXPECT_EQ(SIG_DFL, oldact.sa_handler);
1501  kill(getpid(), SIGPROF);
1502
1503  act.sa_flags |= SA_SIGINFO;
1504  act.sa_sigaction = &SigactionHandler;
1505  sigaction(SIGPROF, &act, &oldact);
1506  EXPECT_FALSE(oldact.sa_flags & SA_SIGINFO);
1507  EXPECT_EQ(SIG_IGN, oldact.sa_handler);
1508  kill(getpid(), SIGPROF);
1509
1510  act.sa_flags &= ~SA_SIGINFO;
1511  act.sa_handler = SIG_DFL;
1512  sigaction(SIGPROF, &act, &oldact);
1513  EXPECT_TRUE(oldact.sa_flags & SA_SIGINFO);
1514  EXPECT_EQ(&SigactionHandler, oldact.sa_sigaction);
1515  EXPECT_EQ(2, cnt);
1516
1517  sigaction(SIGPROF, &origact, 0);
1518}
1519
1520} // namespace
1521
1522struct StructWithDtor {
1523  ~StructWithDtor();
1524};
1525
1526NOINLINE StructWithDtor::~StructWithDtor() {
1527  break_optimization(0);
1528}
1529
1530TEST(MemorySanitizer, Invoke) {
1531  StructWithDtor s;  // Will cause the calls to become invokes.
1532  EXPECT_NOT_POISONED(0);
1533  EXPECT_POISONED(*GetPoisoned<int>());
1534  EXPECT_NOT_POISONED(0);
1535  EXPECT_POISONED(*GetPoisoned<int>());
1536  EXPECT_POISONED(ReturnPoisoned<S4>());
1537}
1538
1539TEST(MemorySanitizer, ptrtoint) {
1540  // Test that shadow is propagated through pointer-to-integer conversion.
1541  void* p = (void*)0xABCD;
1542  __msan_poison(((char*)&p) + 1, sizeof(p));
1543  EXPECT_NOT_POISONED((((uintptr_t)p) & 0xFF) == 0);
1544
1545  void* q = (void*)0xABCD;
1546  __msan_poison(&q, sizeof(q) - 1);
1547  EXPECT_POISONED((((uintptr_t)q) & 0xFF) == 0);
1548}
1549
1550static void vaargsfn2(int guard, ...) {
1551  va_list vl;
1552  va_start(vl, guard);
1553  EXPECT_NOT_POISONED(va_arg(vl, int));
1554  EXPECT_NOT_POISONED(va_arg(vl, int));
1555  EXPECT_NOT_POISONED(va_arg(vl, int));
1556  EXPECT_POISONED(va_arg(vl, double));
1557  va_end(vl);
1558}
1559
1560static void vaargsfn(int guard, ...) {
1561  va_list vl;
1562  va_start(vl, guard);
1563  EXPECT_NOT_POISONED(va_arg(vl, int));
1564  EXPECT_POISONED(va_arg(vl, int));
1565  // The following call will overwrite __msan_param_tls.
1566  // Checks after it test that arg shadow was somehow saved across the call.
1567  vaargsfn2(1, 2, 3, 4, *GetPoisoned<double>());
1568  EXPECT_NOT_POISONED(va_arg(vl, int));
1569  EXPECT_POISONED(va_arg(vl, int));
1570  va_end(vl);
1571}
1572
1573TEST(MemorySanitizer, VAArgTest) {
1574  int* x = GetPoisoned<int>();
1575  int* y = GetPoisoned<int>(4);
1576  vaargsfn(1, 13, *x, 42, *y);
1577}
1578
1579static void vaargsfn_many(int guard, ...) {
1580  va_list vl;
1581  va_start(vl, guard);
1582  EXPECT_NOT_POISONED(va_arg(vl, int));
1583  EXPECT_POISONED(va_arg(vl, int));
1584  EXPECT_NOT_POISONED(va_arg(vl, int));
1585  EXPECT_NOT_POISONED(va_arg(vl, int));
1586  EXPECT_NOT_POISONED(va_arg(vl, int));
1587  EXPECT_NOT_POISONED(va_arg(vl, int));
1588  EXPECT_NOT_POISONED(va_arg(vl, int));
1589  EXPECT_NOT_POISONED(va_arg(vl, int));
1590  EXPECT_NOT_POISONED(va_arg(vl, int));
1591  EXPECT_POISONED(va_arg(vl, int));
1592  va_end(vl);
1593}
1594
1595TEST(MemorySanitizer, VAArgManyTest) {
1596  int* x = GetPoisoned<int>();
1597  int* y = GetPoisoned<int>(4);
1598  vaargsfn_many(1, 2, *x, 3, 4, 5, 6, 7, 8, 9, *y);
1599}
1600
1601static void vaargsfn_pass2(va_list vl) {
1602  EXPECT_NOT_POISONED(va_arg(vl, int));
1603  EXPECT_NOT_POISONED(va_arg(vl, int));
1604  EXPECT_POISONED(va_arg(vl, int));
1605}
1606
1607static void vaargsfn_pass(int guard, ...) {
1608  va_list vl;
1609  va_start(vl, guard);
1610  EXPECT_POISONED(va_arg(vl, int));
1611  vaargsfn_pass2(vl);
1612  va_end(vl);
1613}
1614
1615TEST(MemorySanitizer, VAArgPass) {
1616  int* x = GetPoisoned<int>();
1617  int* y = GetPoisoned<int>(4);
1618  vaargsfn_pass(1, *x, 2, 3, *y);
1619}
1620
1621static void vaargsfn_copy2(va_list vl) {
1622  EXPECT_NOT_POISONED(va_arg(vl, int));
1623  EXPECT_POISONED(va_arg(vl, int));
1624}
1625
1626static void vaargsfn_copy(int guard, ...) {
1627  va_list vl;
1628  va_start(vl, guard);
1629  EXPECT_NOT_POISONED(va_arg(vl, int));
1630  EXPECT_POISONED(va_arg(vl, int));
1631  va_list vl2;
1632  va_copy(vl2, vl);
1633  vaargsfn_copy2(vl2);
1634  EXPECT_NOT_POISONED(va_arg(vl, int));
1635  EXPECT_POISONED(va_arg(vl, int));
1636  va_end(vl);
1637}
1638
1639TEST(MemorySanitizer, VAArgCopy) {
1640  int* x = GetPoisoned<int>();
1641  int* y = GetPoisoned<int>(4);
1642  vaargsfn_copy(1, 2, *x, 3, *y);
1643}
1644
1645static void vaargsfn_ptr(int guard, ...) {
1646  va_list vl;
1647  va_start(vl, guard);
1648  EXPECT_NOT_POISONED(va_arg(vl, int*));
1649  EXPECT_POISONED(va_arg(vl, int*));
1650  EXPECT_NOT_POISONED(va_arg(vl, int*));
1651  EXPECT_POISONED(va_arg(vl, double*));
1652  va_end(vl);
1653}
1654
1655TEST(MemorySanitizer, VAArgPtr) {
1656  int** x = GetPoisoned<int*>();
1657  double** y = GetPoisoned<double*>(8);
1658  int z;
1659  vaargsfn_ptr(1, &z, *x, &z, *y);
1660}
1661
1662static void vaargsfn_overflow(int guard, ...) {
1663  va_list vl;
1664  va_start(vl, guard);
1665  EXPECT_NOT_POISONED(va_arg(vl, int));
1666  EXPECT_NOT_POISONED(va_arg(vl, int));
1667  EXPECT_POISONED(va_arg(vl, int));
1668  EXPECT_NOT_POISONED(va_arg(vl, int));
1669  EXPECT_NOT_POISONED(va_arg(vl, int));
1670  EXPECT_NOT_POISONED(va_arg(vl, int));
1671
1672  EXPECT_NOT_POISONED(va_arg(vl, double));
1673  EXPECT_NOT_POISONED(va_arg(vl, double));
1674  EXPECT_NOT_POISONED(va_arg(vl, double));
1675  EXPECT_POISONED(va_arg(vl, double));
1676  EXPECT_NOT_POISONED(va_arg(vl, double));
1677  EXPECT_POISONED(va_arg(vl, int*));
1678  EXPECT_NOT_POISONED(va_arg(vl, double));
1679  EXPECT_NOT_POISONED(va_arg(vl, double));
1680
1681  EXPECT_POISONED(va_arg(vl, int));
1682  EXPECT_POISONED(va_arg(vl, double));
1683  EXPECT_POISONED(va_arg(vl, int*));
1684
1685  EXPECT_NOT_POISONED(va_arg(vl, int));
1686  EXPECT_NOT_POISONED(va_arg(vl, double));
1687  EXPECT_NOT_POISONED(va_arg(vl, int*));
1688
1689  EXPECT_POISONED(va_arg(vl, int));
1690  EXPECT_POISONED(va_arg(vl, double));
1691  EXPECT_POISONED(va_arg(vl, int*));
1692
1693  va_end(vl);
1694}
1695
1696TEST(MemorySanitizer, VAArgOverflow) {
1697  int* x = GetPoisoned<int>();
1698  double* y = GetPoisoned<double>(8);
1699  int** p = GetPoisoned<int*>(16);
1700  int z;
1701  vaargsfn_overflow(1,
1702      1, 2, *x, 4, 5, 6,
1703      1.1, 2.2, 3.3, *y, 5.5, *p, 7.7, 8.8,
1704      // the following args will overflow for sure
1705      *x, *y, *p,
1706      7, 9.9, &z,
1707      *x, *y, *p);
1708}
1709
1710static void vaargsfn_tlsoverwrite2(int guard, ...) {
1711  va_list vl;
1712  va_start(vl, guard);
1713  EXPECT_NOT_POISONED(va_arg(vl, int));
1714  va_end(vl);
1715}
1716
1717static void vaargsfn_tlsoverwrite(int guard, ...) {
1718  // This call will overwrite TLS contents unless it's backed up somewhere.
1719  vaargsfn_tlsoverwrite2(2, 42);
1720  va_list vl;
1721  va_start(vl, guard);
1722  EXPECT_POISONED(va_arg(vl, int));
1723  va_end(vl);
1724}
1725
1726TEST(MemorySanitizer, VAArgTLSOverwrite) {
1727  int* x = GetPoisoned<int>();
1728  vaargsfn_tlsoverwrite(1, *x);
1729}
1730
1731struct StructByVal {
1732  int a, b, c, d, e, f;
1733};
1734
1735NOINLINE void StructByValTestFunc(struct StructByVal s) {
1736  EXPECT_NOT_POISONED(s.a);
1737  EXPECT_POISONED(s.b);
1738  EXPECT_NOT_POISONED(s.c);
1739  EXPECT_POISONED(s.d);
1740  EXPECT_NOT_POISONED(s.e);
1741  EXPECT_POISONED(s.f);
1742}
1743
1744NOINLINE void StructByValTestFunc1(struct StructByVal s) {
1745  StructByValTestFunc(s);
1746}
1747
1748NOINLINE void StructByValTestFunc2(int z, struct StructByVal s) {
1749  StructByValTestFunc(s);
1750}
1751
1752TEST(MemorySanitizer, StructByVal) {
1753  // Large aggregates are passed as "byval" pointer argument in LLVM.
1754  struct StructByVal s;
1755  s.a = 1;
1756  s.b = *GetPoisoned<int>();
1757  s.c = 2;
1758  s.d = *GetPoisoned<int>();
1759  s.e = 3;
1760  s.f = *GetPoisoned<int>();
1761  StructByValTestFunc(s);
1762  StructByValTestFunc1(s);
1763  StructByValTestFunc2(0, s);
1764}
1765
1766
1767#if MSAN_HAS_M128
1768NOINLINE __m128i m128Eq(__m128i *a, __m128i *b) { return _mm_cmpeq_epi16(*a, *b); }
1769NOINLINE __m128i m128Lt(__m128i *a, __m128i *b) { return _mm_cmplt_epi16(*a, *b); }
1770TEST(MemorySanitizer, m128) {
1771  __m128i a = _mm_set1_epi16(0x1234);
1772  __m128i b = _mm_set1_epi16(0x7890);
1773  EXPECT_NOT_POISONED(m128Eq(&a, &b));
1774  EXPECT_NOT_POISONED(m128Lt(&a, &b));
1775}
1776// FIXME: add more tests for __m128i.
1777#endif  // MSAN_HAS_M128
1778
1779// We should not complain when copying this poisoned hole.
1780struct StructWithHole {
1781  U4  a;
1782  // 4-byte hole.
1783  U8  b;
1784};
1785
1786NOINLINE StructWithHole ReturnStructWithHole() {
1787  StructWithHole res;
1788  __msan_poison(&res, sizeof(res));
1789  res.a = 1;
1790  res.b = 2;
1791  return res;
1792}
1793
1794TEST(MemorySanitizer, StructWithHole) {
1795  StructWithHole a = ReturnStructWithHole();
1796  break_optimization(&a);
1797}
1798
1799template <class T>
1800NOINLINE T ReturnStruct() {
1801  T res;
1802  __msan_poison(&res, sizeof(res));
1803  res.a = 1;
1804  return res;
1805}
1806
1807template <class T>
1808NOINLINE void TestReturnStruct() {
1809  T s1 = ReturnStruct<T>();
1810  EXPECT_NOT_POISONED(s1.a);
1811  EXPECT_POISONED(s1.b);
1812}
1813
1814struct SSS1 {
1815  int a, b, c;
1816};
1817struct SSS2 {
1818  int b, a, c;
1819};
1820struct SSS3 {
1821  int b, c, a;
1822};
1823struct SSS4 {
1824  int c, b, a;
1825};
1826
1827struct SSS5 {
1828  int a;
1829  float b;
1830};
1831struct SSS6 {
1832  int a;
1833  double b;
1834};
1835struct SSS7 {
1836  S8 b;
1837  int a;
1838};
1839struct SSS8 {
1840  S2 b;
1841  S8 a;
1842};
1843
1844TEST(MemorySanitizer, IntStruct3) {
1845  TestReturnStruct<SSS1>();
1846  TestReturnStruct<SSS2>();
1847  TestReturnStruct<SSS3>();
1848  TestReturnStruct<SSS4>();
1849  TestReturnStruct<SSS5>();
1850  TestReturnStruct<SSS6>();
1851  TestReturnStruct<SSS7>();
1852  TestReturnStruct<SSS8>();
1853}
1854
1855struct LongStruct {
1856  U1 a1, b1;
1857  U2 a2, b2;
1858  U4 a4, b4;
1859  U8 a8, b8;
1860};
1861
1862NOINLINE LongStruct ReturnLongStruct1() {
1863  LongStruct res;
1864  __msan_poison(&res, sizeof(res));
1865  res.a1 = res.a2 = res.a4 = res.a8 = 111;
1866  // leaves b1, .., b8 poisoned.
1867  return res;
1868}
1869
1870NOINLINE LongStruct ReturnLongStruct2() {
1871  LongStruct res;
1872  __msan_poison(&res, sizeof(res));
1873  res.b1 = res.b2 = res.b4 = res.b8 = 111;
1874  // leaves a1, .., a8 poisoned.
1875  return res;
1876}
1877
1878TEST(MemorySanitizer, LongStruct) {
1879  LongStruct s1 = ReturnLongStruct1();
1880  __msan_print_shadow(&s1, sizeof(s1));
1881  EXPECT_NOT_POISONED(s1.a1);
1882  EXPECT_NOT_POISONED(s1.a2);
1883  EXPECT_NOT_POISONED(s1.a4);
1884  EXPECT_NOT_POISONED(s1.a8);
1885
1886  EXPECT_POISONED(s1.b1);
1887  EXPECT_POISONED(s1.b2);
1888  EXPECT_POISONED(s1.b4);
1889  EXPECT_POISONED(s1.b8);
1890
1891  LongStruct s2 = ReturnLongStruct2();
1892  __msan_print_shadow(&s2, sizeof(s2));
1893  EXPECT_NOT_POISONED(s2.b1);
1894  EXPECT_NOT_POISONED(s2.b2);
1895  EXPECT_NOT_POISONED(s2.b4);
1896  EXPECT_NOT_POISONED(s2.b8);
1897
1898  EXPECT_POISONED(s2.a1);
1899  EXPECT_POISONED(s2.a2);
1900  EXPECT_POISONED(s2.a4);
1901  EXPECT_POISONED(s2.a8);
1902}
1903
1904TEST(MemorySanitizer, getrlimit) {
1905  struct rlimit limit;
1906  __msan_poison(&limit, sizeof(limit));
1907  int result = getrlimit(RLIMIT_DATA, &limit);
1908  assert(result == 0);
1909  EXPECT_NOT_POISONED(limit.rlim_cur);
1910  EXPECT_NOT_POISONED(limit.rlim_max);
1911}
1912
1913TEST(MemorySanitizer, getrusage) {
1914  struct rusage usage;
1915  __msan_poison(&usage, sizeof(usage));
1916  int result = getrusage(RUSAGE_SELF, &usage);
1917  assert(result == 0);
1918  EXPECT_NOT_POISONED(usage.ru_utime.tv_sec);
1919  EXPECT_NOT_POISONED(usage.ru_utime.tv_usec);
1920  EXPECT_NOT_POISONED(usage.ru_stime.tv_sec);
1921  EXPECT_NOT_POISONED(usage.ru_stime.tv_usec);
1922  EXPECT_NOT_POISONED(usage.ru_maxrss);
1923  EXPECT_NOT_POISONED(usage.ru_minflt);
1924  EXPECT_NOT_POISONED(usage.ru_majflt);
1925  EXPECT_NOT_POISONED(usage.ru_inblock);
1926  EXPECT_NOT_POISONED(usage.ru_oublock);
1927  EXPECT_NOT_POISONED(usage.ru_nvcsw);
1928  EXPECT_NOT_POISONED(usage.ru_nivcsw);
1929}
1930
1931#ifdef __GLIBC__
1932extern char *program_invocation_name;
1933#else  // __GLIBC__
1934# error "TODO: port this"
1935#endif
1936
1937static void dladdr_testfn() {}
1938
1939TEST(MemorySanitizer, dladdr) {
1940  Dl_info info;
1941  __msan_poison(&info, sizeof(info));
1942  int result = dladdr((const void*)dladdr_testfn, &info);
1943  assert(result != 0);
1944  EXPECT_NOT_POISONED((unsigned long)info.dli_fname);
1945  if (info.dli_fname)
1946    EXPECT_NOT_POISONED(strlen(info.dli_fname));
1947  EXPECT_NOT_POISONED((unsigned long)info.dli_fbase);
1948  EXPECT_NOT_POISONED((unsigned long)info.dli_sname);
1949  if (info.dli_sname)
1950    EXPECT_NOT_POISONED(strlen(info.dli_sname));
1951  EXPECT_NOT_POISONED((unsigned long)info.dli_saddr);
1952}
1953
1954static int dl_phdr_callback(struct dl_phdr_info *info, size_t size, void *data) {
1955  (*(int *)data)++;
1956  EXPECT_NOT_POISONED(info->dlpi_addr);
1957  EXPECT_NOT_POISONED(strlen(info->dlpi_name));
1958  EXPECT_NOT_POISONED(info->dlpi_phnum);
1959  for (int i = 0; i < info->dlpi_phnum; ++i)
1960    EXPECT_NOT_POISONED(info->dlpi_phdr[i]);
1961  return 0;
1962}
1963
1964#ifndef MSAN_TEST_DISABLE_DLOPEN
1965
1966// Compute the path to our loadable DSO.  We assume it's in the same
1967// directory.  Only use string routines that we intercept so far to do this.
1968static int PathToLoadable(char *buf, size_t sz) {
1969  const char *basename = "libmsan_loadable.x86_64.so";
1970  char *argv0 = program_invocation_name;
1971  char *last_slash = strrchr(argv0, '/');
1972  assert(last_slash);
1973  int res =
1974      snprintf(buf, sz, "%.*s/%s", int(last_slash - argv0), argv0, basename);
1975  return res < sz ? 0 : res;
1976}
1977
1978TEST(MemorySanitizer, dl_iterate_phdr) {
1979  char path[4096];
1980  int res = PathToLoadable(path, sizeof(path));
1981  assert(!res);
1982
1983  // Having at least one dlopen'ed library in the process makes this more
1984  // entertaining.
1985  void *lib = dlopen(path, RTLD_LAZY);
1986  ASSERT_NE((void*)0, lib);
1987
1988  int count = 0;
1989  int result = dl_iterate_phdr(dl_phdr_callback, &count);
1990  assert(count > 0);
1991
1992  dlclose(lib);
1993}
1994
1995
1996TEST(MemorySanitizer, dlopen) {
1997  char path[4096];
1998  int res = PathToLoadable(path, sizeof(path));
1999  assert(!res);
2000
2001  // We need to clear shadow for globals when doing dlopen.  In order to test
2002  // this, we have to poison the shadow for the DSO before we load it.  In
2003  // general this is difficult, but the loader tends to reload things in the
2004  // same place, so we open, close, and then reopen.  The global should always
2005  // start out clean after dlopen.
2006  for (int i = 0; i < 2; i++) {
2007    void *lib = dlopen(path, RTLD_LAZY);
2008    if (lib == NULL) {
2009      printf("dlerror: %s\n", dlerror());
2010      assert(lib != NULL);
2011    }
2012    void **(*get_dso_global)() = (void **(*)())dlsym(lib, "get_dso_global");
2013    assert(get_dso_global);
2014    void **dso_global = get_dso_global();
2015    EXPECT_NOT_POISONED(*dso_global);
2016    __msan_poison(dso_global, sizeof(*dso_global));
2017    EXPECT_POISONED(*dso_global);
2018    dlclose(lib);
2019  }
2020}
2021
2022// Regression test for a crash in dlopen() interceptor.
2023TEST(MemorySanitizer, dlopenFailed) {
2024  const char *path = "/libmsan_loadable_does_not_exist.x86_64.so";
2025  void *lib = dlopen(path, RTLD_LAZY);
2026  ASSERT_EQ(0, lib);
2027}
2028
2029#endif // MSAN_TEST_DISABLE_DLOPEN
2030
2031TEST(MemorySanitizer, scanf) {
2032  const char *input = "42 hello";
2033  int* d = new int;
2034  char* s = new char[7];
2035  int res = sscanf(input, "%d %5s", d, s);
2036  printf("res %d\n", res);
2037  assert(res == 2);
2038  EXPECT_NOT_POISONED(*d);
2039  EXPECT_NOT_POISONED(s[0]);
2040  EXPECT_NOT_POISONED(s[1]);
2041  EXPECT_NOT_POISONED(s[2]);
2042  EXPECT_NOT_POISONED(s[3]);
2043  EXPECT_NOT_POISONED(s[4]);
2044  EXPECT_NOT_POISONED(s[5]);
2045  EXPECT_POISONED(s[6]);
2046  delete s;
2047  delete d;
2048}
2049
2050static void *SimpleThread_threadfn(void* data) {
2051  return new int;
2052}
2053
2054TEST(MemorySanitizer, SimpleThread) {
2055  pthread_t t;
2056  void *p;
2057  int res = pthread_create(&t, NULL, SimpleThread_threadfn, NULL);
2058  assert(!res);
2059  EXPECT_NOT_POISONED(t);
2060  res = pthread_join(t, &p);
2061  assert(!res);
2062  EXPECT_NOT_POISONED(p);
2063  delete (int*)p;
2064}
2065
2066static void *SmallStackThread_threadfn(void* data) {
2067  return 0;
2068}
2069
2070TEST(MemorySanitizer, SmallStackThread) {
2071  pthread_attr_t attr;
2072  pthread_t t;
2073  void *p;
2074  int res;
2075  res = pthread_attr_init(&attr);
2076  ASSERT_EQ(0, res);
2077  res = pthread_attr_setstacksize(&attr, 64 * 1024);
2078  ASSERT_EQ(0, res);
2079  res = pthread_create(&t, &attr, SmallStackThread_threadfn, NULL);
2080  ASSERT_EQ(0, res);
2081  res = pthread_join(t, &p);
2082  ASSERT_EQ(0, res);
2083  res = pthread_attr_destroy(&attr);
2084  ASSERT_EQ(0, res);
2085}
2086
2087TEST(MemorySanitizer, PreAllocatedStackThread) {
2088  pthread_attr_t attr;
2089  pthread_t t;
2090  int res;
2091  res = pthread_attr_init(&attr);
2092  ASSERT_EQ(0, res);
2093  void *stack;
2094  const size_t kStackSize = 64 * 1024;
2095  res = posix_memalign(&stack, 4096, kStackSize);
2096  ASSERT_EQ(0, res);
2097  res = pthread_attr_setstack(&attr, stack, kStackSize);
2098  ASSERT_EQ(0, res);
2099  // A small self-allocated stack can not be extended by the tool.
2100  // In this case pthread_create is expected to fail.
2101  res = pthread_create(&t, &attr, SmallStackThread_threadfn, NULL);
2102  EXPECT_NE(0, res);
2103  res = pthread_attr_destroy(&attr);
2104  ASSERT_EQ(0, res);
2105}
2106
2107TEST(MemorySanitizer, pthread_getschedparam) {
2108  int policy;
2109  struct sched_param param;
2110  int res = pthread_getschedparam(pthread_self(), &policy, &param);
2111  ASSERT_EQ(0, res);
2112  EXPECT_NOT_POISONED(policy);
2113  EXPECT_NOT_POISONED(param.sched_priority);
2114}
2115
2116TEST(MemorySanitizer, pthread_key_create) {
2117  pthread_key_t key;
2118  int res = pthread_key_create(&key, NULL);
2119  assert(!res);
2120  EXPECT_NOT_POISONED(key);
2121  res = pthread_key_delete(key);
2122  assert(!res);
2123}
2124
2125TEST(MemorySanitizer, posix_memalign) {
2126  void *p;
2127  EXPECT_POISONED(p);
2128  int res = posix_memalign(&p, 4096, 13);
2129  ASSERT_EQ(0, res);
2130  EXPECT_NOT_POISONED(p);
2131  free(p);
2132}
2133
2134TEST(MemorySanitizer, inet_pton) {
2135  const char *s = "1:0:0:0:0:0:0:8";
2136  unsigned char buf[sizeof(struct in6_addr)];
2137  int res = inet_pton(AF_INET6, s, buf);
2138  ASSERT_EQ(1, res);
2139  EXPECT_NOT_POISONED(buf[0]);
2140  EXPECT_NOT_POISONED(buf[sizeof(struct in6_addr) - 1]);
2141
2142  char s_out[INET6_ADDRSTRLEN];
2143  EXPECT_POISONED(s_out[3]);
2144  const char *q = inet_ntop(AF_INET6, buf, s_out, INET6_ADDRSTRLEN);
2145  ASSERT_NE((void*)0, q);
2146  EXPECT_NOT_POISONED(s_out[3]);
2147}
2148
2149TEST(MemorySanitizer, inet_aton) {
2150  const char *s = "127.0.0.1";
2151  struct in_addr in[2];
2152  int res = inet_aton(s, in);
2153  ASSERT_NE(0, res);
2154  EXPECT_NOT_POISONED(in[0]);
2155  EXPECT_POISONED(*(char *)(in + 1));
2156}
2157
2158TEST(MemorySanitizer, uname) {
2159  struct utsname u;
2160  int res = uname(&u);
2161  assert(!res);
2162  EXPECT_NOT_POISONED(strlen(u.sysname));
2163  EXPECT_NOT_POISONED(strlen(u.nodename));
2164  EXPECT_NOT_POISONED(strlen(u.release));
2165  EXPECT_NOT_POISONED(strlen(u.version));
2166  EXPECT_NOT_POISONED(strlen(u.machine));
2167}
2168
2169TEST(MemorySanitizer, gethostname) {
2170  char buf[100];
2171  int res = gethostname(buf, 100);
2172  assert(!res);
2173  EXPECT_NOT_POISONED(strlen(buf));
2174}
2175
2176TEST(MemorySanitizer, sysinfo) {
2177  struct sysinfo info;
2178  int res = sysinfo(&info);
2179  assert(!res);
2180  EXPECT_NOT_POISONED(info);
2181}
2182
2183TEST(MemorySanitizer, getpwuid) {
2184  struct passwd *p = getpwuid(0); // root
2185  assert(p);
2186  EXPECT_NOT_POISONED(p->pw_name);
2187  assert(p->pw_name);
2188  EXPECT_NOT_POISONED(p->pw_name[0]);
2189  EXPECT_NOT_POISONED(p->pw_uid);
2190  assert(p->pw_uid == 0);
2191}
2192
2193TEST(MemorySanitizer, getpwnam_r) {
2194  struct passwd pwd;
2195  struct passwd *pwdres;
2196  char buf[10000];
2197  int res = getpwnam_r("root", &pwd, buf, sizeof(buf), &pwdres);
2198  assert(!res);
2199  EXPECT_NOT_POISONED(pwd.pw_name);
2200  assert(pwd.pw_name);
2201  EXPECT_NOT_POISONED(pwd.pw_name[0]);
2202  EXPECT_NOT_POISONED(pwd.pw_uid);
2203  assert(pwd.pw_uid == 0);
2204}
2205
2206TEST(MemorySanitizer, getpwnam_r_positive) {
2207  struct passwd pwd;
2208  struct passwd *pwdres;
2209  char s[5];
2210  strncpy(s, "abcd", 5);
2211  __msan_poison(s, 5);
2212  char buf[10000];
2213  int res;
2214  EXPECT_UMR(res = getpwnam_r(s, &pwd, buf, sizeof(buf), &pwdres));
2215}
2216
2217TEST(MemorySanitizer, getgrnam_r) {
2218  struct group grp;
2219  struct group *grpres;
2220  char buf[10000];
2221  int res = getgrnam_r("root", &grp, buf, sizeof(buf), &grpres);
2222  assert(!res);
2223  EXPECT_NOT_POISONED(grp.gr_name);
2224  assert(grp.gr_name);
2225  EXPECT_NOT_POISONED(grp.gr_name[0]);
2226  EXPECT_NOT_POISONED(grp.gr_gid);
2227}
2228
2229template<class T>
2230static bool applySlt(T value, T shadow) {
2231  __msan_partial_poison(&value, &shadow, sizeof(T));
2232  volatile bool zzz = true;
2233  // This "|| zzz" trick somehow makes LLVM emit "icmp slt" instead of
2234  // a shift-and-trunc to get at the highest bit.
2235  volatile bool v = value < 0 || zzz;
2236  return v;
2237}
2238
2239TEST(MemorySanitizer, SignedCompareWithZero) {
2240  EXPECT_NOT_POISONED(applySlt<S4>(0xF, 0xF));
2241  EXPECT_NOT_POISONED(applySlt<S4>(0xF, 0xFF));
2242  EXPECT_NOT_POISONED(applySlt<S4>(0xF, 0xFFFFFF));
2243  EXPECT_NOT_POISONED(applySlt<S4>(0xF, 0x7FFFFFF));
2244  EXPECT_UMR(applySlt<S4>(0xF, 0x80FFFFFF));
2245  EXPECT_UMR(applySlt<S4>(0xF, 0xFFFFFFFF));
2246}
2247
2248template <class T, class S>
2249static T poisoned(T Va, S Sa) {
2250  char SIZE_CHECK1[(ssize_t)sizeof(T) - (ssize_t)sizeof(S)];
2251  char SIZE_CHECK2[(ssize_t)sizeof(S) - (ssize_t)sizeof(T)];
2252  T a;
2253  a = Va;
2254  __msan_partial_poison(&a, &Sa, sizeof(T));
2255  return a;
2256}
2257
2258TEST(MemorySanitizer, ICmpRelational) {
2259  EXPECT_NOT_POISONED(poisoned(0, 0) < poisoned(0, 0));
2260  EXPECT_NOT_POISONED(poisoned(0U, 0) < poisoned(0U, 0));
2261  EXPECT_NOT_POISONED(poisoned(0LL, 0LLU) < poisoned(0LL, 0LLU));
2262  EXPECT_NOT_POISONED(poisoned(0LLU, 0LLU) < poisoned(0LLU, 0LLU));
2263  EXPECT_POISONED(poisoned(0xFF, 0xFF) < poisoned(0xFF, 0xFF));
2264  EXPECT_POISONED(poisoned(0xFFFFFFFFU, 0xFFFFFFFFU) <
2265                  poisoned(0xFFFFFFFFU, 0xFFFFFFFFU));
2266  EXPECT_POISONED(poisoned(-1, 0xFFFFFFFFU) <
2267                  poisoned(-1, 0xFFFFFFFFU));
2268
2269  EXPECT_NOT_POISONED(poisoned(0, 0) <= poisoned(0, 0));
2270  EXPECT_NOT_POISONED(poisoned(0U, 0) <= poisoned(0U, 0));
2271  EXPECT_NOT_POISONED(poisoned(0LL, 0LLU) <= poisoned(0LL, 0LLU));
2272  EXPECT_NOT_POISONED(poisoned(0LLU, 0LLU) <= poisoned(0LLU, 0LLU));
2273  EXPECT_POISONED(poisoned(0xFF, 0xFF) <= poisoned(0xFF, 0xFF));
2274  EXPECT_POISONED(poisoned(0xFFFFFFFFU, 0xFFFFFFFFU) <=
2275                  poisoned(0xFFFFFFFFU, 0xFFFFFFFFU));
2276  EXPECT_POISONED(poisoned(-1, 0xFFFFFFFFU) <=
2277                  poisoned(-1, 0xFFFFFFFFU));
2278
2279  EXPECT_NOT_POISONED(poisoned(0, 0) > poisoned(0, 0));
2280  EXPECT_NOT_POISONED(poisoned(0U, 0) > poisoned(0U, 0));
2281  EXPECT_NOT_POISONED(poisoned(0LL, 0LLU) > poisoned(0LL, 0LLU));
2282  EXPECT_NOT_POISONED(poisoned(0LLU, 0LLU) > poisoned(0LLU, 0LLU));
2283  EXPECT_POISONED(poisoned(0xFF, 0xFF) > poisoned(0xFF, 0xFF));
2284  EXPECT_POISONED(poisoned(0xFFFFFFFFU, 0xFFFFFFFFU) >
2285                  poisoned(0xFFFFFFFFU, 0xFFFFFFFFU));
2286  EXPECT_POISONED(poisoned(-1, 0xFFFFFFFFU) >
2287                  poisoned(-1, 0xFFFFFFFFU));
2288
2289  EXPECT_NOT_POISONED(poisoned(0, 0) >= poisoned(0, 0));
2290  EXPECT_NOT_POISONED(poisoned(0U, 0) >= poisoned(0U, 0));
2291  EXPECT_NOT_POISONED(poisoned(0LL, 0LLU) >= poisoned(0LL, 0LLU));
2292  EXPECT_NOT_POISONED(poisoned(0LLU, 0LLU) >= poisoned(0LLU, 0LLU));
2293  EXPECT_POISONED(poisoned(0xFF, 0xFF) >= poisoned(0xFF, 0xFF));
2294  EXPECT_POISONED(poisoned(0xFFFFFFFFU, 0xFFFFFFFFU) >=
2295                  poisoned(0xFFFFFFFFU, 0xFFFFFFFFU));
2296  EXPECT_POISONED(poisoned(-1, 0xFFFFFFFFU) >=
2297                  poisoned(-1, 0xFFFFFFFFU));
2298
2299  EXPECT_POISONED(poisoned(6, 0xF) > poisoned(7, 0));
2300  EXPECT_POISONED(poisoned(0xF, 0xF) > poisoned(7, 0));
2301
2302  EXPECT_NOT_POISONED(poisoned(-1, 0x80000000U) >= poisoned(-1, 0U));
2303}
2304
2305#if MSAN_HAS_M128
2306TEST(MemorySanitizer, ICmpVectorRelational) {
2307  EXPECT_NOT_POISONED(
2308      _mm_cmplt_epi16(poisoned(_mm_set1_epi16(0), _mm_set1_epi16(0)),
2309                   poisoned(_mm_set1_epi16(0), _mm_set1_epi16(0))));
2310  EXPECT_NOT_POISONED(
2311      _mm_cmplt_epi16(poisoned(_mm_set1_epi32(0), _mm_set1_epi32(0)),
2312                   poisoned(_mm_set1_epi32(0), _mm_set1_epi32(0))));
2313  EXPECT_POISONED(
2314      _mm_cmplt_epi16(poisoned(_mm_set1_epi16(0), _mm_set1_epi16(0xFFFF)),
2315                   poisoned(_mm_set1_epi16(0), _mm_set1_epi16(0xFFFF))));
2316  EXPECT_POISONED(_mm_cmpgt_epi16(poisoned(_mm_set1_epi16(6), _mm_set1_epi16(0xF)),
2317                               poisoned(_mm_set1_epi16(7), _mm_set1_epi16(0))));
2318}
2319#endif
2320
2321// Volatile bitfield store is implemented as load-mask-store
2322// Test that we don't warn on the store of (uninitialized) padding.
2323struct VolatileBitfieldStruct {
2324  volatile unsigned x : 1;
2325  unsigned y : 1;
2326};
2327
2328TEST(MemorySanitizer, VolatileBitfield) {
2329  VolatileBitfieldStruct *S = new VolatileBitfieldStruct;
2330  S->x = 1;
2331  EXPECT_NOT_POISONED((unsigned)S->x);
2332  EXPECT_POISONED((unsigned)S->y);
2333}
2334
2335TEST(MemorySanitizer, UnalignedLoad) {
2336  char x[32];
2337  memset(x + 8, 0, 16);
2338  EXPECT_POISONED(__sanitizer_unaligned_load16(x+6));
2339  EXPECT_POISONED(__sanitizer_unaligned_load16(x+7));
2340  EXPECT_NOT_POISONED(__sanitizer_unaligned_load16(x+8));
2341  EXPECT_NOT_POISONED(__sanitizer_unaligned_load16(x+9));
2342  EXPECT_NOT_POISONED(__sanitizer_unaligned_load16(x+22));
2343  EXPECT_POISONED(__sanitizer_unaligned_load16(x+23));
2344  EXPECT_POISONED(__sanitizer_unaligned_load16(x+24));
2345
2346  EXPECT_POISONED(__sanitizer_unaligned_load32(x+4));
2347  EXPECT_POISONED(__sanitizer_unaligned_load32(x+7));
2348  EXPECT_NOT_POISONED(__sanitizer_unaligned_load32(x+8));
2349  EXPECT_NOT_POISONED(__sanitizer_unaligned_load32(x+9));
2350  EXPECT_NOT_POISONED(__sanitizer_unaligned_load32(x+20));
2351  EXPECT_POISONED(__sanitizer_unaligned_load32(x+21));
2352  EXPECT_POISONED(__sanitizer_unaligned_load32(x+24));
2353
2354  EXPECT_POISONED(__sanitizer_unaligned_load64(x));
2355  EXPECT_POISONED(__sanitizer_unaligned_load64(x+1));
2356  EXPECT_POISONED(__sanitizer_unaligned_load64(x+7));
2357  EXPECT_NOT_POISONED(__sanitizer_unaligned_load64(x+8));
2358  EXPECT_NOT_POISONED(__sanitizer_unaligned_load64(x+9));
2359  EXPECT_NOT_POISONED(__sanitizer_unaligned_load64(x+16));
2360  EXPECT_POISONED(__sanitizer_unaligned_load64(x+17));
2361  EXPECT_POISONED(__sanitizer_unaligned_load64(x+21));
2362  EXPECT_POISONED(__sanitizer_unaligned_load64(x+24));
2363}
2364
2365TEST(MemorySanitizer, UnalignedStore16) {
2366  char x[5];
2367  U2 y = 0;
2368  __msan_poison(&y, 1);
2369  __sanitizer_unaligned_store16(x + 1, y);
2370  EXPECT_POISONED(x[0]);
2371  EXPECT_POISONED(x[1]);
2372  EXPECT_NOT_POISONED(x[2]);
2373  EXPECT_POISONED(x[3]);
2374  EXPECT_POISONED(x[4]);
2375}
2376
2377TEST(MemorySanitizer, UnalignedStore32) {
2378  char x[8];
2379  U4 y4 = 0;
2380  __msan_poison(&y4, 2);
2381  __sanitizer_unaligned_store32(x+3, y4);
2382  EXPECT_POISONED(x[0]);
2383  EXPECT_POISONED(x[1]);
2384  EXPECT_POISONED(x[2]);
2385  EXPECT_POISONED(x[3]);
2386  EXPECT_POISONED(x[4]);
2387  EXPECT_NOT_POISONED(x[5]);
2388  EXPECT_NOT_POISONED(x[6]);
2389  EXPECT_POISONED(x[7]);
2390}
2391
2392TEST(MemorySanitizer, UnalignedStore64) {
2393  char x[16];
2394  U8 y = 0;
2395  __msan_poison(&y, 3);
2396  __msan_poison(((char *)&y) + sizeof(y) - 2, 1);
2397  __sanitizer_unaligned_store64(x+3, y);
2398  EXPECT_POISONED(x[0]);
2399  EXPECT_POISONED(x[1]);
2400  EXPECT_POISONED(x[2]);
2401  EXPECT_POISONED(x[3]);
2402  EXPECT_POISONED(x[4]);
2403  EXPECT_POISONED(x[5]);
2404  EXPECT_NOT_POISONED(x[6]);
2405  EXPECT_NOT_POISONED(x[7]);
2406  EXPECT_NOT_POISONED(x[8]);
2407  EXPECT_POISONED(x[9]);
2408  EXPECT_NOT_POISONED(x[10]);
2409  EXPECT_POISONED(x[11]);
2410}
2411
2412TEST(MemorySanitizerDr, StoreInDSOTest) {
2413  if (!__msan_has_dynamic_component()) return;
2414  char* s = new char[10];
2415  dso_memfill(s, 9);
2416  EXPECT_NOT_POISONED(s[5]);
2417  EXPECT_POISONED(s[9]);
2418}
2419
2420int return_poisoned_int() {
2421  return ReturnPoisoned<U8>();
2422}
2423
2424TEST(MemorySanitizerDr, ReturnFromDSOTest) {
2425  if (!__msan_has_dynamic_component()) return;
2426  EXPECT_NOT_POISONED(dso_callfn(return_poisoned_int));
2427}
2428
2429NOINLINE int TrashParamTLS(long long x, long long y, long long z) {  //NOLINT
2430  EXPECT_POISONED(x);
2431  EXPECT_POISONED(y);
2432  EXPECT_POISONED(z);
2433  return 0;
2434}
2435
2436static int CheckParamTLS(long long x, long long y, long long z) {  //NOLINT
2437  EXPECT_NOT_POISONED(x);
2438  EXPECT_NOT_POISONED(y);
2439  EXPECT_NOT_POISONED(z);
2440  return 0;
2441}
2442
2443TEST(MemorySanitizerDr, CallFromDSOTest) {
2444  if (!__msan_has_dynamic_component()) return;
2445  S8* x = GetPoisoned<S8>();
2446  S8* y = GetPoisoned<S8>();
2447  S8* z = GetPoisoned<S8>();
2448  EXPECT_NOT_POISONED(TrashParamTLS(*x, *y, *z));
2449  EXPECT_NOT_POISONED(dso_callfn1(CheckParamTLS));
2450}
2451
2452static void StackStoreInDSOFn(int* x, int* y) {
2453  EXPECT_NOT_POISONED(*x);
2454  EXPECT_NOT_POISONED(*y);
2455}
2456
2457TEST(MemorySanitizerDr, StackStoreInDSOTest) {
2458  if (!__msan_has_dynamic_component()) return;
2459  dso_stack_store(StackStoreInDSOFn, 1);
2460}
2461
2462TEST(MemorySanitizerOrigins, SetGet) {
2463  EXPECT_EQ(TrackingOrigins(), __msan_get_track_origins());
2464  if (!TrackingOrigins()) return;
2465  int x;
2466  __msan_set_origin(&x, sizeof(x), 1234);
2467  EXPECT_EQ(1234, __msan_get_origin(&x));
2468  __msan_set_origin(&x, sizeof(x), 5678);
2469  EXPECT_EQ(5678, __msan_get_origin(&x));
2470  __msan_set_origin(&x, sizeof(x), 0);
2471  EXPECT_EQ(0, __msan_get_origin(&x));
2472}
2473
2474namespace {
2475struct S {
2476  U4 dummy;
2477  U2 a;
2478  U2 b;
2479};
2480
2481// http://code.google.com/p/memory-sanitizer/issues/detail?id=6
2482TEST(MemorySanitizerOrigins, DISABLED_InitializedStoreDoesNotChangeOrigin) {
2483  if (!TrackingOrigins()) return;
2484
2485  S s;
2486  U4 origin = rand();  // NOLINT
2487  s.a = *GetPoisonedO<U2>(0, origin);
2488  EXPECT_EQ(origin, __msan_get_origin(&s.a));
2489  EXPECT_EQ(origin, __msan_get_origin(&s.b));
2490
2491  s.b = 42;
2492  EXPECT_EQ(origin, __msan_get_origin(&s.a));
2493  EXPECT_EQ(origin, __msan_get_origin(&s.b));
2494}
2495}  // namespace
2496
2497template<class T, class BinaryOp>
2498INLINE
2499void BinaryOpOriginTest(BinaryOp op) {
2500  U4 ox = rand();  //NOLINT
2501  U4 oy = rand();  //NOLINT
2502  T *x = GetPoisonedO<T>(0, ox, 0);
2503  T *y = GetPoisonedO<T>(1, oy, 0);
2504  T *z = GetPoisonedO<T>(2, 0, 0);
2505
2506  *z = op(*x, *y);
2507  U4 origin = __msan_get_origin(z);
2508  EXPECT_POISONED_O(*z, origin);
2509  EXPECT_EQ(true, origin == ox || origin == oy);
2510
2511  // y is poisoned, x is not.
2512  *x = 10101;
2513  *y = *GetPoisonedO<T>(1, oy);
2514  break_optimization(x);
2515  __msan_set_origin(z, sizeof(*z), 0);
2516  *z = op(*x, *y);
2517  EXPECT_POISONED_O(*z, oy);
2518  EXPECT_EQ(__msan_get_origin(z), oy);
2519
2520  // x is poisoned, y is not.
2521  *x = *GetPoisonedO<T>(0, ox);
2522  *y = 10101010;
2523  break_optimization(y);
2524  __msan_set_origin(z, sizeof(*z), 0);
2525  *z = op(*x, *y);
2526  EXPECT_POISONED_O(*z, ox);
2527  EXPECT_EQ(__msan_get_origin(z), ox);
2528}
2529
2530template<class T> INLINE T XOR(const T &a, const T&b) { return a ^ b; }
2531template<class T> INLINE T ADD(const T &a, const T&b) { return a + b; }
2532template<class T> INLINE T SUB(const T &a, const T&b) { return a - b; }
2533template<class T> INLINE T MUL(const T &a, const T&b) { return a * b; }
2534template<class T> INLINE T AND(const T &a, const T&b) { return a & b; }
2535template<class T> INLINE T OR (const T &a, const T&b) { return a | b; }
2536
2537TEST(MemorySanitizerOrigins, BinaryOp) {
2538  if (!TrackingOrigins()) return;
2539  BinaryOpOriginTest<S8>(XOR<S8>);
2540  BinaryOpOriginTest<U8>(ADD<U8>);
2541  BinaryOpOriginTest<S4>(SUB<S4>);
2542  BinaryOpOriginTest<S4>(MUL<S4>);
2543  BinaryOpOriginTest<U4>(OR<U4>);
2544  BinaryOpOriginTest<U4>(AND<U4>);
2545  BinaryOpOriginTest<double>(ADD<U4>);
2546  BinaryOpOriginTest<float>(ADD<S4>);
2547  BinaryOpOriginTest<double>(ADD<double>);
2548  BinaryOpOriginTest<float>(ADD<double>);
2549}
2550
2551TEST(MemorySanitizerOrigins, Unary) {
2552  if (!TrackingOrigins()) return;
2553  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__), __LINE__);
2554  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__), __LINE__);
2555  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__), __LINE__);
2556  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__), __LINE__);
2557
2558  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2559  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2560  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2561  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2562
2563  EXPECT_POISONED_O(*GetPoisonedO<U4>(0, __LINE__), __LINE__);
2564  EXPECT_POISONED_O(*GetPoisonedO<U4>(0, __LINE__), __LINE__);
2565  EXPECT_POISONED_O(*GetPoisonedO<U4>(0, __LINE__), __LINE__);
2566  EXPECT_POISONED_O(*GetPoisonedO<U4>(0, __LINE__), __LINE__);
2567
2568  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2569  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2570  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2571  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2572
2573  EXPECT_POISONED_O((void*)*GetPoisonedO<S8>(0, __LINE__), __LINE__);
2574  EXPECT_POISONED_O((U8)*GetPoisonedO<void*>(0, __LINE__), __LINE__);
2575}
2576
2577TEST(MemorySanitizerOrigins, EQ) {
2578  if (!TrackingOrigins()) return;
2579  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__) <= 11, __LINE__);
2580  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__) == 11, __LINE__);
2581  EXPECT_POISONED_O(*GetPoisonedO<float>(0, __LINE__) == 1.1, __LINE__);
2582}
2583
2584TEST(MemorySanitizerOrigins, DIV) {
2585  if (!TrackingOrigins()) return;
2586  EXPECT_POISONED_O(*GetPoisonedO<U8>(0, __LINE__) / 100, __LINE__);
2587  unsigned o = __LINE__;
2588  EXPECT_UMR_O(volatile unsigned y = 100 / *GetPoisonedO<S4>(0, o, 1), o);
2589}
2590
2591TEST(MemorySanitizerOrigins, SHIFT) {
2592  if (!TrackingOrigins()) return;
2593  EXPECT_POISONED_O(*GetPoisonedO<U8>(0, __LINE__) >> 10, __LINE__);
2594  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__) >> 10, __LINE__);
2595  EXPECT_POISONED_O(*GetPoisonedO<S8>(0, __LINE__) << 10, __LINE__);
2596  EXPECT_POISONED_O(10U << *GetPoisonedO<U8>(0, __LINE__), __LINE__);
2597  EXPECT_POISONED_O(-10 >> *GetPoisonedO<S8>(0, __LINE__), __LINE__);
2598  EXPECT_POISONED_O(-10 << *GetPoisonedO<S8>(0, __LINE__), __LINE__);
2599}
2600
2601template<class T, int N>
2602void MemCpyTest() {
2603  int ox = __LINE__;
2604  T *x = new T[N];
2605  T *y = new T[N];
2606  T *z = new T[N];
2607  T *q = new T[N];
2608  __msan_poison(x, N * sizeof(T));
2609  __msan_set_origin(x, N * sizeof(T), ox);
2610  __msan_set_origin(y, N * sizeof(T), 777777);
2611  __msan_set_origin(z, N * sizeof(T), 888888);
2612  EXPECT_NOT_POISONED(x);
2613  memcpy(y, x, N * sizeof(T));
2614  EXPECT_POISONED_O(y[0], ox);
2615  EXPECT_POISONED_O(y[N/2], ox);
2616  EXPECT_POISONED_O(y[N-1], ox);
2617  EXPECT_NOT_POISONED(x);
2618  void *res = mempcpy(q, x, N * sizeof(T));
2619  ASSERT_EQ(q + N, res);
2620  EXPECT_POISONED_O(q[0], ox);
2621  EXPECT_POISONED_O(q[N/2], ox);
2622  EXPECT_POISONED_O(q[N-1], ox);
2623  EXPECT_NOT_POISONED(x);
2624  memmove(z, x, N * sizeof(T));
2625  EXPECT_POISONED_O(z[0], ox);
2626  EXPECT_POISONED_O(z[N/2], ox);
2627  EXPECT_POISONED_O(z[N-1], ox);
2628}
2629
2630TEST(MemorySanitizerOrigins, LargeMemCpy) {
2631  if (!TrackingOrigins()) return;
2632  MemCpyTest<U1, 10000>();
2633  MemCpyTest<U8, 10000>();
2634}
2635
2636TEST(MemorySanitizerOrigins, SmallMemCpy) {
2637  if (!TrackingOrigins()) return;
2638  MemCpyTest<U8, 1>();
2639  MemCpyTest<U8, 2>();
2640  MemCpyTest<U8, 3>();
2641}
2642
2643TEST(MemorySanitizerOrigins, Select) {
2644  if (!TrackingOrigins()) return;
2645  EXPECT_NOT_POISONED(g_one ? 1 : *GetPoisonedO<S4>(0, __LINE__));
2646  EXPECT_POISONED_O(*GetPoisonedO<S4>(0, __LINE__), __LINE__);
2647  S4 x;
2648  break_optimization(&x);
2649  x = g_1 ? *GetPoisonedO<S4>(0, __LINE__) : 0;
2650
2651  EXPECT_POISONED_O(g_1 ? *GetPoisonedO<S4>(0, __LINE__) : 1, __LINE__);
2652  EXPECT_POISONED_O(g_0 ? 1 : *GetPoisonedO<S4>(0, __LINE__), __LINE__);
2653}
2654
2655extern "C"
2656NOINLINE char AllocaTO() {
2657  int ar[100];
2658  break_optimization(ar);
2659  return ar[10];
2660  // fprintf(stderr, "Descr: %s\n",
2661  //        __msan_get_origin_descr_if_stack(__msan_get_origin_tls()));
2662}
2663
2664TEST(MemorySanitizerOrigins, Alloca) {
2665  if (!TrackingOrigins()) return;
2666  EXPECT_POISONED_S(AllocaTO(), "ar@AllocaTO");
2667  EXPECT_POISONED_S(AllocaTO(), "ar@AllocaTO");
2668  EXPECT_POISONED_S(AllocaTO(), "ar@AllocaTO");
2669  EXPECT_POISONED_S(AllocaTO(), "ar@AllocaTO");
2670}
2671
2672// FIXME: replace with a lit-like test.
2673TEST(MemorySanitizerOrigins, DISABLED_AllocaDeath) {
2674  if (!TrackingOrigins()) return;
2675  EXPECT_DEATH(AllocaTO(), "ORIGIN: stack allocation: ar@AllocaTO");
2676}
2677
2678NOINLINE int RetvalOriginTest(U4 origin) {
2679  int *a = new int;
2680  break_optimization(a);
2681  __msan_set_origin(a, sizeof(*a), origin);
2682  int res = *a;
2683  delete a;
2684  return res;
2685}
2686
2687TEST(MemorySanitizerOrigins, Retval) {
2688  if (!TrackingOrigins()) return;
2689  EXPECT_POISONED_O(RetvalOriginTest(__LINE__), __LINE__);
2690}
2691
2692NOINLINE void ParamOriginTest(int param, U4 origin) {
2693  EXPECT_POISONED_O(param, origin);
2694}
2695
2696TEST(MemorySanitizerOrigins, Param) {
2697  if (!TrackingOrigins()) return;
2698  int *a = new int;
2699  U4 origin = __LINE__;
2700  break_optimization(a);
2701  __msan_set_origin(a, sizeof(*a), origin);
2702  ParamOriginTest(*a, origin);
2703  delete a;
2704}
2705
2706TEST(MemorySanitizerOrigins, Invoke) {
2707  if (!TrackingOrigins()) return;
2708  StructWithDtor s;  // Will cause the calls to become invokes.
2709  EXPECT_POISONED_O(RetvalOriginTest(__LINE__), __LINE__);
2710}
2711
2712TEST(MemorySanitizerOrigins, strlen) {
2713  S8 alignment;
2714  break_optimization(&alignment);
2715  char x[4] = {'a', 'b', 0, 0};
2716  __msan_poison(&x[2], 1);
2717  U4 origin = __LINE__;
2718  __msan_set_origin(x, sizeof(x), origin);
2719  EXPECT_UMR_O(volatile unsigned y = strlen(x), origin);
2720}
2721
2722TEST(MemorySanitizerOrigins, wcslen) {
2723  wchar_t w[3] = {'a', 'b', 0};
2724  U4 origin = __LINE__;
2725  __msan_set_origin(w, sizeof(w), origin);
2726  __msan_poison(&w[2], sizeof(wchar_t));
2727  EXPECT_UMR_O(volatile unsigned y = wcslen(w), origin);
2728}
2729
2730#if MSAN_HAS_M128
2731TEST(MemorySanitizerOrigins, StoreIntrinsic) {
2732  __m128 x, y;
2733  U4 origin = __LINE__;
2734  __msan_set_origin(&x, sizeof(x), origin);
2735  __msan_poison(&x, sizeof(x));
2736  __builtin_ia32_storeups((float*)&y, x);
2737  EXPECT_POISONED_O(y, origin);
2738}
2739#endif
2740
2741NOINLINE void RecursiveMalloc(int depth) {
2742  static int count;
2743  count++;
2744  if ((count % (1024 * 1024)) == 0)
2745    printf("RecursiveMalloc: %d\n", count);
2746  int *x1 = new int;
2747  int *x2 = new int;
2748  break_optimization(x1);
2749  break_optimization(x2);
2750  if (depth > 0) {
2751    RecursiveMalloc(depth-1);
2752    RecursiveMalloc(depth-1);
2753  }
2754  delete x1;
2755  delete x2;
2756}
2757
2758TEST(MemorySanitizer, CallocOverflow) {
2759  size_t kArraySize = 4096;
2760  volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
2761  volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
2762  void *p = calloc(kArraySize, kArraySize2);  // Should return 0.
2763  EXPECT_EQ(0L, Ident(p));
2764}
2765
2766TEST(MemorySanitizerStress, DISABLED_MallocStackTrace) {
2767  RecursiveMalloc(22);
2768}
2769