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1 //===-- asan_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 AddressSanitizer, an address sanity checker.
11 //
12 //===----------------------------------------------------------------------===//
13 #include <stdio.h>
14 #include <signal.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <strings.h>
18 #include <pthread.h>
19 #include <stdint.h>
20 #include <setjmp.h>
21 #include <assert.h>
22 
23 #if defined(__i386__) || defined(__x86_64__)
24 #include <emmintrin.h>
25 #endif
26 
27 #include "asan_test_config.h"
28 #include "asan_test_utils.h"
29 
30 #ifndef __APPLE__
31 #include <malloc.h>
32 #else
33 #include <AvailabilityMacros.h>  // For MAC_OS_X_VERSION_*
34 #include <CoreFoundation/CFString.h>
35 #endif  // __APPLE__
36 
37 #if ASAN_HAS_EXCEPTIONS
38 # define ASAN_THROW(x) throw (x)
39 #else
40 # define ASAN_THROW(x)
41 #endif
42 
43 #include <sys/mman.h>
44 
45 typedef uint8_t   U1;
46 typedef uint16_t  U2;
47 typedef uint32_t  U4;
48 typedef uint64_t  U8;
49 
50 static const char *progname;
51 static const int kPageSize = 4096;
52 
53 // Simple stand-alone pseudorandom number generator.
54 // Current algorithm is ANSI C linear congruential PRNG.
my_rand(uint32_t * state)55 static inline uint32_t my_rand(uint32_t* state) {
56   return (*state = *state * 1103515245 + 12345) >> 16;
57 }
58 
59 static uint32_t global_seed = 0;
60 
61 const size_t kLargeMalloc = 1 << 24;
62 
63 template<typename T>
asan_write(T * a)64 NOINLINE void asan_write(T *a) {
65   *a = 0;
66 }
67 
asan_write_sized_aligned(uint8_t * p,size_t size)68 NOINLINE void asan_write_sized_aligned(uint8_t *p, size_t size) {
69   EXPECT_EQ(0, ((uintptr_t)p % size));
70   if      (size == 1) asan_write((uint8_t*)p);
71   else if (size == 2) asan_write((uint16_t*)p);
72   else if (size == 4) asan_write((uint32_t*)p);
73   else if (size == 8) asan_write((uint64_t*)p);
74 }
75 
malloc_fff(size_t size)76 NOINLINE void *malloc_fff(size_t size) {
77   void *res = malloc/**/(size); break_optimization(0); return res;}
malloc_eee(size_t size)78 NOINLINE void *malloc_eee(size_t size) {
79   void *res = malloc_fff(size); break_optimization(0); return res;}
malloc_ddd(size_t size)80 NOINLINE void *malloc_ddd(size_t size) {
81   void *res = malloc_eee(size); break_optimization(0); return res;}
malloc_ccc(size_t size)82 NOINLINE void *malloc_ccc(size_t size) {
83   void *res = malloc_ddd(size); break_optimization(0); return res;}
malloc_bbb(size_t size)84 NOINLINE void *malloc_bbb(size_t size) {
85   void *res = malloc_ccc(size); break_optimization(0); return res;}
malloc_aaa(size_t size)86 NOINLINE void *malloc_aaa(size_t size) {
87   void *res = malloc_bbb(size); break_optimization(0); return res;}
88 
89 #ifndef __APPLE__
memalign_fff(size_t alignment,size_t size)90 NOINLINE void *memalign_fff(size_t alignment, size_t size) {
91   void *res = memalign/**/(alignment, size); break_optimization(0); return res;}
memalign_eee(size_t alignment,size_t size)92 NOINLINE void *memalign_eee(size_t alignment, size_t size) {
93   void *res = memalign_fff(alignment, size); break_optimization(0); return res;}
memalign_ddd(size_t alignment,size_t size)94 NOINLINE void *memalign_ddd(size_t alignment, size_t size) {
95   void *res = memalign_eee(alignment, size); break_optimization(0); return res;}
memalign_ccc(size_t alignment,size_t size)96 NOINLINE void *memalign_ccc(size_t alignment, size_t size) {
97   void *res = memalign_ddd(alignment, size); break_optimization(0); return res;}
memalign_bbb(size_t alignment,size_t size)98 NOINLINE void *memalign_bbb(size_t alignment, size_t size) {
99   void *res = memalign_ccc(alignment, size); break_optimization(0); return res;}
memalign_aaa(size_t alignment,size_t size)100 NOINLINE void *memalign_aaa(size_t alignment, size_t size) {
101   void *res = memalign_bbb(alignment, size); break_optimization(0); return res;}
102 #endif  // __APPLE__
103 
104 
free_ccc(void * p)105 NOINLINE void free_ccc(void *p) { free(p); break_optimization(0);}
free_bbb(void * p)106 NOINLINE void free_bbb(void *p) { free_ccc(p); break_optimization(0);}
free_aaa(void * p)107 NOINLINE void free_aaa(void *p) { free_bbb(p); break_optimization(0);}
108 
109 template<typename T>
oob_test(int size,int off)110 NOINLINE void oob_test(int size, int off) {
111   char *p = (char*)malloc_aaa(size);
112   // fprintf(stderr, "writing %d byte(s) into [%p,%p) with offset %d\n",
113   //        sizeof(T), p, p + size, off);
114   asan_write((T*)(p + off));
115   free_aaa(p);
116 }
117 
118 
119 template<typename T>
uaf_test(int size,int off)120 NOINLINE void uaf_test(int size, int off) {
121   char *p = (char *)malloc_aaa(size);
122   free_aaa(p);
123   for (int i = 1; i < 100; i++)
124     free_aaa(malloc_aaa(i));
125   fprintf(stderr, "writing %ld byte(s) at %p with offset %d\n",
126           (long)sizeof(T), p, off);
127   asan_write((T*)(p + off));
128 }
129 
TEST(AddressSanitizer,HasFeatureAddressSanitizerTest)130 TEST(AddressSanitizer, HasFeatureAddressSanitizerTest) {
131 #if defined(__has_feature) && __has_feature(address_sanitizer)
132   bool asan = 1;
133 #else
134   bool asan = 0;
135 #endif
136   EXPECT_EQ(true, asan);
137 }
138 
TEST(AddressSanitizer,SimpleDeathTest)139 TEST(AddressSanitizer, SimpleDeathTest) {
140   EXPECT_DEATH(exit(1), "");
141 }
142 
TEST(AddressSanitizer,VariousMallocsTest)143 TEST(AddressSanitizer, VariousMallocsTest) {
144   // fprintf(stderr, "malloc:\n");
145   int *a = (int*)malloc(100 * sizeof(int));
146   a[50] = 0;
147   free(a);
148 
149   // fprintf(stderr, "realloc:\n");
150   int *r = (int*)malloc(10);
151   r = (int*)realloc(r, 2000 * sizeof(int));
152   r[1000] = 0;
153   free(r);
154 
155   // fprintf(stderr, "operator new []\n");
156   int *b = new int[100];
157   b[50] = 0;
158   delete [] b;
159 
160   // fprintf(stderr, "operator new\n");
161   int *c = new int;
162   *c = 0;
163   delete c;
164 
165 #if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__)
166   // fprintf(stderr, "posix_memalign\n");
167   int *pm;
168   int pm_res = posix_memalign((void**)&pm, kPageSize, kPageSize);
169   EXPECT_EQ(0, pm_res);
170   free(pm);
171 #endif
172 
173 #if !defined(__APPLE__)
174   int *ma = (int*)memalign(kPageSize, kPageSize);
175   EXPECT_EQ(0, (uintptr_t)ma % kPageSize);
176   ma[123] = 0;
177   free(ma);
178 #endif  // __APPLE__
179 }
180 
TEST(AddressSanitizer,CallocTest)181 TEST(AddressSanitizer, CallocTest) {
182   int *a = (int*)calloc(100, sizeof(int));
183   EXPECT_EQ(0, a[10]);
184   free(a);
185 }
186 
TEST(AddressSanitizer,VallocTest)187 TEST(AddressSanitizer, VallocTest) {
188   void *a = valloc(100);
189   EXPECT_EQ(0, (uintptr_t)a % kPageSize);
190   free(a);
191 }
192 
193 #ifndef __APPLE__
TEST(AddressSanitizer,PvallocTest)194 TEST(AddressSanitizer, PvallocTest) {
195   char *a = (char*)pvalloc(kPageSize + 100);
196   EXPECT_EQ(0, (uintptr_t)a % kPageSize);
197   a[kPageSize + 101] = 1;  // we should not report an error here.
198   free(a);
199 
200   a = (char*)pvalloc(0);  // pvalloc(0) should allocate at least one page.
201   EXPECT_EQ(0, (uintptr_t)a % kPageSize);
202   a[101] = 1;  // we should not report an error here.
203   free(a);
204 }
205 #endif  // __APPLE__
206 
TSDWorker(void * test_key)207 void *TSDWorker(void *test_key) {
208   if (test_key) {
209     pthread_setspecific(*(pthread_key_t*)test_key, (void*)0xfeedface);
210   }
211   return NULL;
212 }
213 
TSDDestructor(void * tsd)214 void TSDDestructor(void *tsd) {
215   // Spawning a thread will check that the current thread id is not -1.
216   pthread_t th;
217   pthread_create(&th, NULL, TSDWorker, NULL);
218   pthread_join(th, NULL);
219 }
220 
221 // This tests triggers the thread-specific data destruction fiasco which occurs
222 // if we don't manage the TSD destructors ourselves. We create a new pthread
223 // key with a non-NULL destructor which is likely to be put after the destructor
224 // of AsanThread in the list of destructors.
225 // In this case the TSD for AsanThread will be destroyed before TSDDestructor
226 // is called for the child thread, and a CHECK will fail when we call
227 // pthread_create() to spawn the grandchild.
TEST(AddressSanitizer,DISABLED_TSDTest)228 TEST(AddressSanitizer, DISABLED_TSDTest) {
229   pthread_t th;
230   pthread_key_t test_key;
231   pthread_key_create(&test_key, TSDDestructor);
232   pthread_create(&th, NULL, TSDWorker, &test_key);
233   pthread_join(th, NULL);
234   pthread_key_delete(test_key);
235 }
236 
237 template<typename T>
OOBTest()238 void OOBTest() {
239   char expected_str[100];
240   for (int size = sizeof(T); size < 20; size += 5) {
241     for (int i = -5; i < 0; i++) {
242       const char *str =
243           "is located.*%d byte.*to the left";
244       sprintf(expected_str, str, abs(i));
245       EXPECT_DEATH(oob_test<T>(size, i), expected_str);
246     }
247 
248     for (int i = 0; i < size - sizeof(T) + 1; i++)
249       oob_test<T>(size, i);
250 
251     for (int i = size - sizeof(T) + 1; i <= size + 3 * sizeof(T); i++) {
252       const char *str =
253           "is located.*%d byte.*to the right";
254       int off = i >= size ? (i - size) : 0;
255       // we don't catch unaligned partially OOB accesses.
256       if (i % sizeof(T)) continue;
257       sprintf(expected_str, str, off);
258       EXPECT_DEATH(oob_test<T>(size, i), expected_str);
259     }
260   }
261 
262   EXPECT_DEATH(oob_test<T>(kLargeMalloc, -1),
263           "is located.*1 byte.*to the left");
264   EXPECT_DEATH(oob_test<T>(kLargeMalloc, kLargeMalloc),
265           "is located.*0 byte.*to the right");
266 }
267 
268 // TODO(glider): the following tests are EXTREMELY slow on Darwin:
269 //   AddressSanitizer.OOB_char (125503 ms)
270 //   AddressSanitizer.OOB_int (126890 ms)
271 //   AddressSanitizer.OOBRightTest (315605 ms)
272 //   AddressSanitizer.SimpleStackTest (366559 ms)
273 
TEST(AddressSanitizer,OOB_char)274 TEST(AddressSanitizer, OOB_char) {
275   OOBTest<U1>();
276 }
277 
TEST(AddressSanitizer,OOB_int)278 TEST(AddressSanitizer, OOB_int) {
279   OOBTest<U4>();
280 }
281 
TEST(AddressSanitizer,OOBRightTest)282 TEST(AddressSanitizer, OOBRightTest) {
283   for (size_t access_size = 1; access_size <= 8; access_size *= 2) {
284     for (size_t alloc_size = 1; alloc_size <= 8; alloc_size++) {
285       for (size_t offset = 0; offset <= 8; offset += access_size) {
286         void *p = malloc(alloc_size);
287         // allocated: [p, p + alloc_size)
288         // accessed:  [p + offset, p + offset + access_size)
289         uint8_t *addr = (uint8_t*)p + offset;
290         if (offset + access_size <= alloc_size) {
291           asan_write_sized_aligned(addr, access_size);
292         } else {
293           int outside_bytes = offset > alloc_size ? (offset - alloc_size) : 0;
294           const char *str =
295               "is located.%d *byte.*to the right";
296           char expected_str[100];
297           sprintf(expected_str, str, outside_bytes);
298           EXPECT_DEATH(asan_write_sized_aligned(addr, access_size),
299                        expected_str);
300         }
301         free(p);
302       }
303     }
304   }
305 }
306 
TEST(AddressSanitizer,UAF_char)307 TEST(AddressSanitizer, UAF_char) {
308   const char *uaf_string = "AddressSanitizer.*heap-use-after-free";
309   EXPECT_DEATH(uaf_test<U1>(1, 0), uaf_string);
310   EXPECT_DEATH(uaf_test<U1>(10, 0), uaf_string);
311   EXPECT_DEATH(uaf_test<U1>(10, 10), uaf_string);
312   EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, 0), uaf_string);
313   EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, kLargeMalloc / 2), uaf_string);
314 }
315 
316 #if ASAN_HAS_BLACKLIST
TEST(AddressSanitizer,IgnoreTest)317 TEST(AddressSanitizer, IgnoreTest) {
318   int *x = Ident(new int);
319   delete Ident(x);
320   *x = 0;
321 }
322 #endif  // ASAN_HAS_BLACKLIST
323 
324 struct StructWithBitField {
325   int bf1:1;
326   int bf2:1;
327   int bf3:1;
328   int bf4:29;
329 };
330 
TEST(AddressSanitizer,BitFieldPositiveTest)331 TEST(AddressSanitizer, BitFieldPositiveTest) {
332   StructWithBitField *x = new StructWithBitField;
333   delete Ident(x);
334   EXPECT_DEATH(x->bf1 = 0, "use-after-free");
335   EXPECT_DEATH(x->bf2 = 0, "use-after-free");
336   EXPECT_DEATH(x->bf3 = 0, "use-after-free");
337   EXPECT_DEATH(x->bf4 = 0, "use-after-free");
338 };
339 
340 struct StructWithBitFields_8_24 {
341   int a:8;
342   int b:24;
343 };
344 
TEST(AddressSanitizer,BitFieldNegativeTest)345 TEST(AddressSanitizer, BitFieldNegativeTest) {
346   StructWithBitFields_8_24 *x = Ident(new StructWithBitFields_8_24);
347   x->a = 0;
348   x->b = 0;
349   delete Ident(x);
350 }
351 
TEST(AddressSanitizer,OutOfMemoryTest)352 TEST(AddressSanitizer, OutOfMemoryTest) {
353   size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000);
354   EXPECT_EQ(0, realloc(0, size));
355   EXPECT_EQ(0, realloc(0, ~Ident(0)));
356   EXPECT_EQ(0, malloc(size));
357   EXPECT_EQ(0, malloc(~Ident(0)));
358   EXPECT_EQ(0, calloc(1, size));
359   EXPECT_EQ(0, calloc(1, ~Ident(0)));
360 }
361 
362 #if ASAN_NEEDS_SEGV
TEST(AddressSanitizer,WildAddressTest)363 TEST(AddressSanitizer, WildAddressTest) {
364   char *c = (char*)0x123;
365   EXPECT_DEATH(*c = 0, "AddressSanitizer crashed on unknown address");
366 }
367 #endif
368 
MallocStress(size_t n)369 static void MallocStress(size_t n) {
370   uint32_t seed = my_rand(&global_seed);
371   for (size_t iter = 0; iter < 10; iter++) {
372     vector<void *> vec;
373     for (size_t i = 0; i < n; i++) {
374       if ((i % 3) == 0) {
375         if (vec.empty()) continue;
376         size_t idx = my_rand(&seed) % vec.size();
377         void *ptr = vec[idx];
378         vec[idx] = vec.back();
379         vec.pop_back();
380         free_aaa(ptr);
381       } else {
382         size_t size = my_rand(&seed) % 1000 + 1;
383 #ifndef __APPLE__
384         size_t alignment = 1 << (my_rand(&seed) % 7 + 3);
385         char *ptr = (char*)memalign_aaa(alignment, size);
386 #else
387         char *ptr = (char*) malloc_aaa(size);
388 #endif
389         vec.push_back(ptr);
390         ptr[0] = 0;
391         ptr[size-1] = 0;
392         ptr[size/2] = 0;
393       }
394     }
395     for (size_t i = 0; i < vec.size(); i++)
396       free_aaa(vec[i]);
397   }
398 }
399 
TEST(AddressSanitizer,MallocStressTest)400 TEST(AddressSanitizer, MallocStressTest) {
401   MallocStress((ASAN_LOW_MEMORY) ? 20000 : 200000);
402 }
403 
TestLargeMalloc(size_t size)404 static void TestLargeMalloc(size_t size) {
405   char buff[1024];
406   sprintf(buff, "is located 1 bytes to the left of %lu-byte", (long)size);
407   EXPECT_DEATH(Ident((char*)malloc(size))[-1] = 0, buff);
408 }
409 
TEST(AddressSanitizer,LargeMallocTest)410 TEST(AddressSanitizer, LargeMallocTest) {
411   for (int i = 113; i < (1 << 28); i = i * 2 + 13) {
412     TestLargeMalloc(i);
413   }
414 }
415 
416 #if ASAN_LOW_MEMORY != 1
TEST(AddressSanitizer,HugeMallocTest)417 TEST(AddressSanitizer, HugeMallocTest) {
418 #ifdef __APPLE__
419   // It was empirically found out that 1215 megabytes is the maximum amount of
420   // memory available to the process under AddressSanitizer on 32-bit Mac 10.6.
421   // 32-bit Mac 10.7 gives even less (< 1G).
422   // (the libSystem malloc() allows allocating up to 2300 megabytes without
423   // ASan).
424   size_t n_megs = __WORDSIZE == 32 ? 500 : 4100;
425 #else
426   size_t n_megs = __WORDSIZE == 32 ? 2600 : 4100;
427 #endif
428   TestLargeMalloc(n_megs << 20);
429 }
430 #endif
431 
TEST(AddressSanitizer,ThreadedMallocStressTest)432 TEST(AddressSanitizer, ThreadedMallocStressTest) {
433   const int kNumThreads = 4;
434   const int kNumIterations = (ASAN_LOW_MEMORY) ? 10000 : 100000;
435   pthread_t t[kNumThreads];
436   for (int i = 0; i < kNumThreads; i++) {
437     pthread_create(&t[i], 0, (void* (*)(void *x))MallocStress,
438         (void*)kNumIterations);
439   }
440   for (int i = 0; i < kNumThreads; i++) {
441     pthread_join(t[i], 0);
442   }
443 }
444 
ManyThreadsWorker(void * a)445 void *ManyThreadsWorker(void *a) {
446   for (int iter = 0; iter < 100; iter++) {
447     for (size_t size = 100; size < 2000; size *= 2) {
448       free(Ident(malloc(size)));
449     }
450   }
451   return 0;
452 }
453 
TEST(AddressSanitizer,ManyThreadsTest)454 TEST(AddressSanitizer, ManyThreadsTest) {
455   const size_t kNumThreads = __WORDSIZE == 32 ? 30 : 1000;
456   pthread_t t[kNumThreads];
457   for (size_t i = 0; i < kNumThreads; i++) {
458     pthread_create(&t[i], 0, (void* (*)(void *x))ManyThreadsWorker, (void*)i);
459   }
460   for (size_t i = 0; i < kNumThreads; i++) {
461     pthread_join(t[i], 0);
462   }
463 }
464 
TEST(AddressSanitizer,ReallocTest)465 TEST(AddressSanitizer, ReallocTest) {
466   const int kMinElem = 5;
467   int *ptr = (int*)malloc(sizeof(int) * kMinElem);
468   ptr[3] = 3;
469   for (int i = 0; i < 10000; i++) {
470     ptr = (int*)realloc(ptr,
471         (my_rand(&global_seed) % 1000 + kMinElem) * sizeof(int));
472     EXPECT_EQ(3, ptr[3]);
473   }
474 }
475 
476 #ifndef __APPLE__
477 static const char *kMallocUsableSizeErrorMsg =
478   "AddressSanitizer attempting to call malloc_usable_size()";
479 
TEST(AddressSanitizer,MallocUsableSizeTest)480 TEST(AddressSanitizer, MallocUsableSizeTest) {
481   const size_t kArraySize = 100;
482   char *array = Ident((char*)malloc(kArraySize));
483   int *int_ptr = Ident(new int);
484   EXPECT_EQ(0, malloc_usable_size(NULL));
485   EXPECT_EQ(kArraySize, malloc_usable_size(array));
486   EXPECT_EQ(sizeof(int), malloc_usable_size(int_ptr));
487   EXPECT_DEATH(malloc_usable_size((void*)0x123), kMallocUsableSizeErrorMsg);
488   EXPECT_DEATH(malloc_usable_size(array + kArraySize / 2),
489                kMallocUsableSizeErrorMsg);
490   free(array);
491   EXPECT_DEATH(malloc_usable_size(array), kMallocUsableSizeErrorMsg);
492 }
493 #endif
494 
WrongFree()495 void WrongFree() {
496   int *x = (int*)malloc(100 * sizeof(int));
497   // Use the allocated memory, otherwise Clang will optimize it out.
498   Ident(x);
499   free(x + 1);
500 }
501 
TEST(AddressSanitizer,WrongFreeTest)502 TEST(AddressSanitizer, WrongFreeTest) {
503   EXPECT_DEATH(WrongFree(),
504                "ERROR: AddressSanitizer attempting free.*not malloc");
505 }
506 
DoubleFree()507 void DoubleFree() {
508   int *x = (int*)malloc(100 * sizeof(int));
509   fprintf(stderr, "DoubleFree: x=%p\n", x);
510   free(x);
511   free(x);
512   fprintf(stderr, "should have failed in the second free(%p)\n", x);
513   abort();
514 }
515 
TEST(AddressSanitizer,DoubleFreeTest)516 TEST(AddressSanitizer, DoubleFreeTest) {
517   EXPECT_DEATH(DoubleFree(), ASAN_PCRE_DOTALL
518                "ERROR: AddressSanitizer attempting double-free"
519                ".*is located 0 bytes inside of 400-byte region"
520                ".*freed by thread T0 here"
521                ".*previously allocated by thread T0 here");
522 }
523 
524 template<int kSize>
SizedStackTest()525 NOINLINE void SizedStackTest() {
526   char a[kSize];
527   char  *A = Ident((char*)&a);
528   for (size_t i = 0; i < kSize; i++)
529     A[i] = i;
530   EXPECT_DEATH(A[-1] = 0, "");
531   EXPECT_DEATH(A[-20] = 0, "");
532   EXPECT_DEATH(A[-31] = 0, "");
533   EXPECT_DEATH(A[kSize] = 0, "");
534   EXPECT_DEATH(A[kSize + 1] = 0, "");
535   EXPECT_DEATH(A[kSize + 10] = 0, "");
536   EXPECT_DEATH(A[kSize + 31] = 0, "");
537 }
538 
TEST(AddressSanitizer,SimpleStackTest)539 TEST(AddressSanitizer, SimpleStackTest) {
540   SizedStackTest<1>();
541   SizedStackTest<2>();
542   SizedStackTest<3>();
543   SizedStackTest<4>();
544   SizedStackTest<5>();
545   SizedStackTest<6>();
546   SizedStackTest<7>();
547   SizedStackTest<16>();
548   SizedStackTest<25>();
549   SizedStackTest<34>();
550   SizedStackTest<43>();
551   SizedStackTest<51>();
552   SizedStackTest<62>();
553   SizedStackTest<64>();
554   SizedStackTest<128>();
555 }
556 
TEST(AddressSanitizer,ManyStackObjectsTest)557 TEST(AddressSanitizer, ManyStackObjectsTest) {
558   char XXX[10];
559   char YYY[20];
560   char ZZZ[30];
561   Ident(XXX);
562   Ident(YYY);
563   EXPECT_DEATH(Ident(ZZZ)[-1] = 0, ASAN_PCRE_DOTALL "XXX.*YYY.*ZZZ");
564 }
565 
Frame0(int frame,char * a,char * b,char * c)566 NOINLINE static void Frame0(int frame, char *a, char *b, char *c) {
567   char d[4] = {0};
568   char *D = Ident(d);
569   switch (frame) {
570     case 3: a[5]++; break;
571     case 2: b[5]++; break;
572     case 1: c[5]++; break;
573     case 0: D[5]++; break;
574   }
575 }
Frame1(int frame,char * a,char * b)576 NOINLINE static void Frame1(int frame, char *a, char *b) {
577   char c[4] = {0}; Frame0(frame, a, b, c);
578   break_optimization(0);
579 }
Frame2(int frame,char * a)580 NOINLINE static void Frame2(int frame, char *a) {
581   char b[4] = {0}; Frame1(frame, a, b);
582   break_optimization(0);
583 }
Frame3(int frame)584 NOINLINE static void Frame3(int frame) {
585   char a[4] = {0}; Frame2(frame, a);
586   break_optimization(0);
587 }
588 
TEST(AddressSanitizer,GuiltyStackFrame0Test)589 TEST(AddressSanitizer, GuiltyStackFrame0Test) {
590   EXPECT_DEATH(Frame3(0), "located .*in frame <.*Frame0");
591 }
TEST(AddressSanitizer,GuiltyStackFrame1Test)592 TEST(AddressSanitizer, GuiltyStackFrame1Test) {
593   EXPECT_DEATH(Frame3(1), "located .*in frame <.*Frame1");
594 }
TEST(AddressSanitizer,GuiltyStackFrame2Test)595 TEST(AddressSanitizer, GuiltyStackFrame2Test) {
596   EXPECT_DEATH(Frame3(2), "located .*in frame <.*Frame2");
597 }
TEST(AddressSanitizer,GuiltyStackFrame3Test)598 TEST(AddressSanitizer, GuiltyStackFrame3Test) {
599   EXPECT_DEATH(Frame3(3), "located .*in frame <.*Frame3");
600 }
601 
LongJmpFunc1(jmp_buf buf)602 NOINLINE void LongJmpFunc1(jmp_buf buf) {
603   // create three red zones for these two stack objects.
604   int a;
605   int b;
606 
607   int *A = Ident(&a);
608   int *B = Ident(&b);
609   *A = *B;
610   longjmp(buf, 1);
611 }
612 
UnderscopeLongJmpFunc1(jmp_buf buf)613 NOINLINE void UnderscopeLongJmpFunc1(jmp_buf buf) {
614   // create three red zones for these two stack objects.
615   int a;
616   int b;
617 
618   int *A = Ident(&a);
619   int *B = Ident(&b);
620   *A = *B;
621   _longjmp(buf, 1);
622 }
623 
SigLongJmpFunc1(sigjmp_buf buf)624 NOINLINE void SigLongJmpFunc1(sigjmp_buf buf) {
625   // create three red zones for these two stack objects.
626   int a;
627   int b;
628 
629   int *A = Ident(&a);
630   int *B = Ident(&b);
631   *A = *B;
632   siglongjmp(buf, 1);
633 }
634 
635 
TouchStackFunc()636 NOINLINE void TouchStackFunc() {
637   int a[100];  // long array will intersect with redzones from LongJmpFunc1.
638   int *A = Ident(a);
639   for (int i = 0; i < 100; i++)
640     A[i] = i*i;
641 }
642 
643 // Test that we handle longjmp and do not report fals positives on stack.
TEST(AddressSanitizer,LongJmpTest)644 TEST(AddressSanitizer, LongJmpTest) {
645   static jmp_buf buf;
646   if (!setjmp(buf)) {
647     LongJmpFunc1(buf);
648   } else {
649     TouchStackFunc();
650   }
651 }
652 
TEST(AddressSanitizer,UnderscopeLongJmpTest)653 TEST(AddressSanitizer, UnderscopeLongJmpTest) {
654   static jmp_buf buf;
655   if (!_setjmp(buf)) {
656     UnderscopeLongJmpFunc1(buf);
657   } else {
658     TouchStackFunc();
659   }
660 }
661 
TEST(AddressSanitizer,SigLongJmpTest)662 TEST(AddressSanitizer, SigLongJmpTest) {
663   static sigjmp_buf buf;
664   if (!sigsetjmp(buf, 1)) {
665     SigLongJmpFunc1(buf);
666   } else {
667     TouchStackFunc();
668   }
669 }
670 
671 #ifdef __EXCEPTIONS
ThrowFunc()672 NOINLINE void ThrowFunc() {
673   // create three red zones for these two stack objects.
674   int a;
675   int b;
676 
677   int *A = Ident(&a);
678   int *B = Ident(&b);
679   *A = *B;
680   ASAN_THROW(1);
681 }
682 
TEST(AddressSanitizer,CxxExceptionTest)683 TEST(AddressSanitizer, CxxExceptionTest) {
684   if (ASAN_UAR) return;
685   // TODO(kcc): this test crashes on 32-bit for some reason...
686   if (__WORDSIZE == 32) return;
687   try {
688     ThrowFunc();
689   } catch(...) {}
690   TouchStackFunc();
691 }
692 #endif
693 
ThreadStackReuseFunc1(void * unused)694 void *ThreadStackReuseFunc1(void *unused) {
695   // create three red zones for these two stack objects.
696   int a;
697   int b;
698 
699   int *A = Ident(&a);
700   int *B = Ident(&b);
701   *A = *B;
702   pthread_exit(0);
703   return 0;
704 }
705 
ThreadStackReuseFunc2(void * unused)706 void *ThreadStackReuseFunc2(void *unused) {
707   TouchStackFunc();
708   return 0;
709 }
710 
TEST(AddressSanitizer,ThreadStackReuseTest)711 TEST(AddressSanitizer, ThreadStackReuseTest) {
712   pthread_t t;
713   pthread_create(&t, 0, ThreadStackReuseFunc1, 0);
714   pthread_join(t, 0);
715   pthread_create(&t, 0, ThreadStackReuseFunc2, 0);
716   pthread_join(t, 0);
717 }
718 
719 #if defined(__i386__) || defined(__x86_64__)
TEST(AddressSanitizer,Store128Test)720 TEST(AddressSanitizer, Store128Test) {
721   char *a = Ident((char*)malloc(Ident(12)));
722   char *p = a;
723   if (((uintptr_t)a % 16) != 0)
724     p = a + 8;
725   assert(((uintptr_t)p % 16) == 0);
726   __m128i value_wide = _mm_set1_epi16(0x1234);
727   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
728                "AddressSanitizer heap-buffer-overflow");
729   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
730                "WRITE of size 16");
731   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
732                "located 0 bytes to the right of 12-byte");
733   free(a);
734 }
735 #endif
736 
RightOOBErrorMessage(int oob_distance)737 static string RightOOBErrorMessage(int oob_distance) {
738   assert(oob_distance >= 0);
739   char expected_str[100];
740   sprintf(expected_str, "located %d bytes to the right", oob_distance);
741   return string(expected_str);
742 }
743 
LeftOOBErrorMessage(int oob_distance)744 static string LeftOOBErrorMessage(int oob_distance) {
745   assert(oob_distance > 0);
746   char expected_str[100];
747   sprintf(expected_str, "located %d bytes to the left", oob_distance);
748   return string(expected_str);
749 }
750 
751 template<typename T>
MemSetOOBTestTemplate(size_t length)752 void MemSetOOBTestTemplate(size_t length) {
753   if (length == 0) return;
754   size_t size = Ident(sizeof(T) * length);
755   T *array = Ident((T*)malloc(size));
756   int element = Ident(42);
757   int zero = Ident(0);
758   // memset interval inside array
759   memset(array, element, size);
760   memset(array, element, size - 1);
761   memset(array + length - 1, element, sizeof(T));
762   memset(array, element, 1);
763 
764   // memset 0 bytes
765   memset(array - 10, element, zero);
766   memset(array - 1, element, zero);
767   memset(array, element, zero);
768   memset(array + length, 0, zero);
769   memset(array + length + 1, 0, zero);
770 
771   // try to memset bytes to the right of array
772   EXPECT_DEATH(memset(array, 0, size + 1),
773                RightOOBErrorMessage(0));
774   EXPECT_DEATH(memset((char*)(array + length) - 1, element, 6),
775                RightOOBErrorMessage(4));
776   EXPECT_DEATH(memset(array + 1, element, size + sizeof(T)),
777                RightOOBErrorMessage(2 * sizeof(T) - 1));
778   // whole interval is to the right
779   EXPECT_DEATH(memset(array + length + 1, 0, 10),
780                RightOOBErrorMessage(sizeof(T)));
781 
782   // try to memset bytes to the left of array
783   EXPECT_DEATH(memset((char*)array - 1, element, size),
784                LeftOOBErrorMessage(1));
785   EXPECT_DEATH(memset((char*)array - 5, 0, 6),
786                LeftOOBErrorMessage(5));
787   EXPECT_DEATH(memset(array - 5, element, size + 5 * sizeof(T)),
788                LeftOOBErrorMessage(5 * sizeof(T)));
789   // whole interval is to the left
790   EXPECT_DEATH(memset(array - 2, 0, sizeof(T)),
791                LeftOOBErrorMessage(2 * sizeof(T)));
792 
793   // try to memset bytes both to the left & to the right
794   EXPECT_DEATH(memset((char*)array - 2, element, size + 4),
795                LeftOOBErrorMessage(2));
796 
797   free(array);
798 }
799 
TEST(AddressSanitizer,MemSetOOBTest)800 TEST(AddressSanitizer, MemSetOOBTest) {
801   MemSetOOBTestTemplate<char>(100);
802   MemSetOOBTestTemplate<int>(5);
803   MemSetOOBTestTemplate<double>(256);
804   // We can test arrays of structres/classes here, but what for?
805 }
806 
807 // Same test for memcpy and memmove functions
808 template <typename T, class M>
MemTransferOOBTestTemplate(size_t length)809 void MemTransferOOBTestTemplate(size_t length) {
810   if (length == 0) return;
811   size_t size = Ident(sizeof(T) * length);
812   T *src = Ident((T*)malloc(size));
813   T *dest = Ident((T*)malloc(size));
814   int zero = Ident(0);
815 
816   // valid transfer of bytes between arrays
817   M::transfer(dest, src, size);
818   M::transfer(dest + 1, src, size - sizeof(T));
819   M::transfer(dest, src + length - 1, sizeof(T));
820   M::transfer(dest, src, 1);
821 
822   // transfer zero bytes
823   M::transfer(dest - 1, src, 0);
824   M::transfer(dest + length, src, zero);
825   M::transfer(dest, src - 1, zero);
826   M::transfer(dest, src, zero);
827 
828   // try to change mem to the right of dest
829   EXPECT_DEATH(M::transfer(dest + 1, src, size),
830                RightOOBErrorMessage(sizeof(T) - 1));
831   EXPECT_DEATH(M::transfer((char*)(dest + length) - 1, src, 5),
832                RightOOBErrorMessage(3));
833 
834   // try to change mem to the left of dest
835   EXPECT_DEATH(M::transfer(dest - 2, src, size),
836                LeftOOBErrorMessage(2 * sizeof(T)));
837   EXPECT_DEATH(M::transfer((char*)dest - 3, src, 4),
838                LeftOOBErrorMessage(3));
839 
840   // try to access mem to the right of src
841   EXPECT_DEATH(M::transfer(dest, src + 2, size),
842                RightOOBErrorMessage(2 * sizeof(T) - 1));
843   EXPECT_DEATH(M::transfer(dest, (char*)(src + length) - 3, 6),
844                RightOOBErrorMessage(2));
845 
846   // try to access mem to the left of src
847   EXPECT_DEATH(M::transfer(dest, src - 1, size),
848                LeftOOBErrorMessage(sizeof(T)));
849   EXPECT_DEATH(M::transfer(dest, (char*)src - 6, 7),
850                LeftOOBErrorMessage(6));
851 
852   // Generally we don't need to test cases where both accessing src and writing
853   // to dest address to poisoned memory.
854 
855   T *big_src = Ident((T*)malloc(size * 2));
856   T *big_dest = Ident((T*)malloc(size * 2));
857   // try to change mem to both sides of dest
858   EXPECT_DEATH(M::transfer(dest - 1, big_src, size * 2),
859                LeftOOBErrorMessage(sizeof(T)));
860   // try to access mem to both sides of src
861   EXPECT_DEATH(M::transfer(big_dest, src - 2, size * 2),
862                LeftOOBErrorMessage(2 * sizeof(T)));
863 
864   free(src);
865   free(dest);
866   free(big_src);
867   free(big_dest);
868 }
869 
870 class MemCpyWrapper {
871  public:
transfer(void * to,const void * from,size_t size)872   static void* transfer(void *to, const void *from, size_t size) {
873     return memcpy(to, from, size);
874   }
875 };
TEST(AddressSanitizer,MemCpyOOBTest)876 TEST(AddressSanitizer, MemCpyOOBTest) {
877   MemTransferOOBTestTemplate<char, MemCpyWrapper>(100);
878   MemTransferOOBTestTemplate<int, MemCpyWrapper>(1024);
879 }
880 
881 class MemMoveWrapper {
882  public:
transfer(void * to,const void * from,size_t size)883   static void* transfer(void *to, const void *from, size_t size) {
884     return memmove(to, from, size);
885   }
886 };
TEST(AddressSanitizer,MemMoveOOBTest)887 TEST(AddressSanitizer, MemMoveOOBTest) {
888   MemTransferOOBTestTemplate<char, MemMoveWrapper>(100);
889   MemTransferOOBTestTemplate<int, MemMoveWrapper>(1024);
890 }
891 
892 // Tests for string functions
893 
894 // Used for string functions tests
895 static char global_string[] = "global";
896 static size_t global_string_length = 6;
897 
898 // Input to a test is a zero-terminated string str with given length
899 // Accesses to the bytes to the left and to the right of str
900 // are presumed to produce OOB errors
StrLenOOBTestTemplate(char * str,size_t length,bool is_global)901 void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) {
902   // Normal strlen calls
903   EXPECT_EQ(strlen(str), length);
904   if (length > 0) {
905     EXPECT_EQ(strlen(str + 1), length - 1);
906     EXPECT_EQ(strlen(str + length), 0);
907   }
908   // Arg of strlen is not malloced, OOB access
909   if (!is_global) {
910     // We don't insert RedZones to the left of global variables
911     EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBErrorMessage(1));
912     EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBErrorMessage(5));
913   }
914   EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBErrorMessage(0));
915   // Overwrite terminator
916   str[length] = 'a';
917   // String is not zero-terminated, strlen will lead to OOB access
918   EXPECT_DEATH(Ident(strlen(str)), RightOOBErrorMessage(0));
919   EXPECT_DEATH(Ident(strlen(str + length)), RightOOBErrorMessage(0));
920   // Restore terminator
921   str[length] = 0;
922 }
TEST(AddressSanitizer,StrLenOOBTest)923 TEST(AddressSanitizer, StrLenOOBTest) {
924   // Check heap-allocated string
925   size_t length = Ident(10);
926   char *heap_string = Ident((char*)malloc(length + 1));
927   char stack_string[10 + 1];
928   for (int i = 0; i < length; i++) {
929     heap_string[i] = 'a';
930     stack_string[i] = 'b';
931   }
932   heap_string[length] = 0;
933   stack_string[length] = 0;
934   StrLenOOBTestTemplate(heap_string, length, false);
935   // TODO(samsonov): Fix expected messages in StrLenOOBTestTemplate to
936   //      make test for stack_string work. Or move it to output tests.
937   // StrLenOOBTestTemplate(stack_string, length, false);
938   StrLenOOBTestTemplate(global_string, global_string_length, true);
939   free(heap_string);
940 }
941 
MallocAndMemsetString(size_t size,char ch)942 static inline char* MallocAndMemsetString(size_t size, char ch) {
943   char *s = Ident((char*)malloc(size));
944   memset(s, ch, size);
945   return s;
946 }
MallocAndMemsetString(size_t size)947 static inline char* MallocAndMemsetString(size_t size) {
948   return MallocAndMemsetString(size, 'z');
949 }
950 
951 #ifndef __APPLE__
TEST(AddressSanitizer,StrNLenOOBTest)952 TEST(AddressSanitizer, StrNLenOOBTest) {
953   size_t size = Ident(123);
954   char *str = MallocAndMemsetString(size);
955   // Normal strnlen calls.
956   Ident(strnlen(str - 1, 0));
957   Ident(strnlen(str, size));
958   Ident(strnlen(str + size - 1, 1));
959   str[size - 1] = '\0';
960   Ident(strnlen(str, 2 * size));
961   // Argument points to not allocated memory.
962   EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBErrorMessage(1));
963   EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBErrorMessage(0));
964   // Overwrite the terminating '\0' and hit unallocated memory.
965   str[size - 1] = 'z';
966   EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBErrorMessage(0));
967   free(str);
968 }
969 #endif
970 
TEST(AddressSanitizer,StrDupOOBTest)971 TEST(AddressSanitizer, StrDupOOBTest) {
972   size_t size = Ident(42);
973   char *str = MallocAndMemsetString(size);
974   char *new_str;
975   // Normal strdup calls.
976   str[size - 1] = '\0';
977   new_str = strdup(str);
978   free(new_str);
979   new_str = strdup(str + size - 1);
980   free(new_str);
981   // Argument points to not allocated memory.
982   EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBErrorMessage(1));
983   EXPECT_DEATH(Ident(strdup(str + size)), RightOOBErrorMessage(0));
984   // Overwrite the terminating '\0' and hit unallocated memory.
985   str[size - 1] = 'z';
986   EXPECT_DEATH(Ident(strdup(str)), RightOOBErrorMessage(0));
987   free(str);
988 }
989 
TEST(AddressSanitizer,StrCpyOOBTest)990 TEST(AddressSanitizer, StrCpyOOBTest) {
991   size_t to_size = Ident(30);
992   size_t from_size = Ident(6);  // less than to_size
993   char *to = Ident((char*)malloc(to_size));
994   char *from = Ident((char*)malloc(from_size));
995   // Normal strcpy calls.
996   strcpy(from, "hello");
997   strcpy(to, from);
998   strcpy(to + to_size - from_size, from);
999   // Length of "from" is too small.
1000   EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBErrorMessage(0));
1001   // "to" or "from" points to not allocated memory.
1002   EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBErrorMessage(1));
1003   EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBErrorMessage(1));
1004   EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBErrorMessage(0));
1005   EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBErrorMessage(0));
1006   // Overwrite the terminating '\0' character and hit unallocated memory.
1007   from[from_size - 1] = '!';
1008   EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBErrorMessage(0));
1009   free(to);
1010   free(from);
1011 }
1012 
TEST(AddressSanitizer,StrNCpyOOBTest)1013 TEST(AddressSanitizer, StrNCpyOOBTest) {
1014   size_t to_size = Ident(20);
1015   size_t from_size = Ident(6);  // less than to_size
1016   char *to = Ident((char*)malloc(to_size));
1017   // From is a zero-terminated string "hello\0" of length 6
1018   char *from = Ident((char*)malloc(from_size));
1019   strcpy(from, "hello");
1020   // copy 0 bytes
1021   strncpy(to, from, 0);
1022   strncpy(to - 1, from - 1, 0);
1023   // normal strncpy calls
1024   strncpy(to, from, from_size);
1025   strncpy(to, from, to_size);
1026   strncpy(to, from + from_size - 1, to_size);
1027   strncpy(to + to_size - 1, from, 1);
1028   // One of {to, from} points to not allocated memory
1029   EXPECT_DEATH(Ident(strncpy(to, from - 1, from_size)),
1030                LeftOOBErrorMessage(1));
1031   EXPECT_DEATH(Ident(strncpy(to - 1, from, from_size)),
1032                LeftOOBErrorMessage(1));
1033   EXPECT_DEATH(Ident(strncpy(to, from + from_size, 1)),
1034                RightOOBErrorMessage(0));
1035   EXPECT_DEATH(Ident(strncpy(to + to_size, from, 1)),
1036                RightOOBErrorMessage(0));
1037   // Length of "to" is too small
1038   EXPECT_DEATH(Ident(strncpy(to + to_size - from_size + 1, from, from_size)),
1039                RightOOBErrorMessage(0));
1040   EXPECT_DEATH(Ident(strncpy(to + 1, from, to_size)),
1041                RightOOBErrorMessage(0));
1042   // Overwrite terminator in from
1043   from[from_size - 1] = '!';
1044   // normal strncpy call
1045   strncpy(to, from, from_size);
1046   // Length of "from" is too small
1047   EXPECT_DEATH(Ident(strncpy(to, from, to_size)),
1048                RightOOBErrorMessage(0));
1049   free(to);
1050   free(from);
1051 }
1052 
1053 typedef char*(*PointerToStrChr)(const char*, int);
RunStrChrTest(PointerToStrChr StrChr)1054 void RunStrChrTest(PointerToStrChr StrChr) {
1055   size_t size = Ident(100);
1056   char *str = MallocAndMemsetString(size);
1057   str[10] = 'q';
1058   str[11] = '\0';
1059   EXPECT_EQ(str, StrChr(str, 'z'));
1060   EXPECT_EQ(str + 10, StrChr(str, 'q'));
1061   EXPECT_EQ(NULL, StrChr(str, 'a'));
1062   // StrChr argument points to not allocated memory.
1063   EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBErrorMessage(1));
1064   EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBErrorMessage(0));
1065   // Overwrite the terminator and hit not allocated memory.
1066   str[11] = 'z';
1067   EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBErrorMessage(0));
1068   free(str);
1069 }
TEST(AddressSanitizer,StrChrAndIndexOOBTest)1070 TEST(AddressSanitizer, StrChrAndIndexOOBTest) {
1071   RunStrChrTest(&strchr);
1072   RunStrChrTest(&index);
1073 }
1074 
TEST(AddressSanitizer,StrCmpAndFriendsLogicTest)1075 TEST(AddressSanitizer, StrCmpAndFriendsLogicTest) {
1076   // strcmp
1077   EXPECT_EQ(0, strcmp("", ""));
1078   EXPECT_EQ(0, strcmp("abcd", "abcd"));
1079   EXPECT_GT(0, strcmp("ab", "ac"));
1080   EXPECT_GT(0, strcmp("abc", "abcd"));
1081   EXPECT_LT(0, strcmp("acc", "abc"));
1082   EXPECT_LT(0, strcmp("abcd", "abc"));
1083 
1084   // strncmp
1085   EXPECT_EQ(0, strncmp("a", "b", 0));
1086   EXPECT_EQ(0, strncmp("abcd", "abcd", 10));
1087   EXPECT_EQ(0, strncmp("abcd", "abcef", 3));
1088   EXPECT_GT(0, strncmp("abcde", "abcfa", 4));
1089   EXPECT_GT(0, strncmp("a", "b", 5));
1090   EXPECT_GT(0, strncmp("bc", "bcde", 4));
1091   EXPECT_LT(0, strncmp("xyz", "xyy", 10));
1092   EXPECT_LT(0, strncmp("baa", "aaa", 1));
1093   EXPECT_LT(0, strncmp("zyx", "", 2));
1094 
1095   // strcasecmp
1096   EXPECT_EQ(0, strcasecmp("", ""));
1097   EXPECT_EQ(0, strcasecmp("zzz", "zzz"));
1098   EXPECT_EQ(0, strcasecmp("abCD", "ABcd"));
1099   EXPECT_GT(0, strcasecmp("aB", "Ac"));
1100   EXPECT_GT(0, strcasecmp("ABC", "ABCd"));
1101   EXPECT_LT(0, strcasecmp("acc", "abc"));
1102   EXPECT_LT(0, strcasecmp("ABCd", "abc"));
1103 
1104   // strncasecmp
1105   EXPECT_EQ(0, strncasecmp("a", "b", 0));
1106   EXPECT_EQ(0, strncasecmp("abCD", "ABcd", 10));
1107   EXPECT_EQ(0, strncasecmp("abCd", "ABcef", 3));
1108   EXPECT_GT(0, strncasecmp("abcde", "ABCfa", 4));
1109   EXPECT_GT(0, strncasecmp("a", "B", 5));
1110   EXPECT_GT(0, strncasecmp("bc", "BCde", 4));
1111   EXPECT_LT(0, strncasecmp("xyz", "xyy", 10));
1112   EXPECT_LT(0, strncasecmp("Baa", "aaa", 1));
1113   EXPECT_LT(0, strncasecmp("zyx", "", 2));
1114 
1115   // memcmp
1116   EXPECT_EQ(0, memcmp("a", "b", 0));
1117   EXPECT_EQ(0, memcmp("ab\0c", "ab\0c", 4));
1118   EXPECT_GT(0, memcmp("\0ab", "\0ac", 3));
1119   EXPECT_GT(0, memcmp("abb\0", "abba", 4));
1120   EXPECT_LT(0, memcmp("ab\0cd", "ab\0c\0", 5));
1121   EXPECT_LT(0, memcmp("zza", "zyx", 3));
1122 }
1123 
1124 typedef int(*PointerToStrCmp)(const char*, const char*);
RunStrCmpTest(PointerToStrCmp StrCmp)1125 void RunStrCmpTest(PointerToStrCmp StrCmp) {
1126   size_t size = Ident(100);
1127   char *s1 = MallocAndMemsetString(size);
1128   char *s2 = MallocAndMemsetString(size);
1129   s1[size - 1] = '\0';
1130   s2[size - 1] = '\0';
1131   // Normal StrCmp calls
1132   Ident(StrCmp(s1, s2));
1133   Ident(StrCmp(s1, s2 + size - 1));
1134   Ident(StrCmp(s1 + size - 1, s2 + size - 1));
1135   s1[size - 1] = 'z';
1136   s2[size - 1] = 'x';
1137   Ident(StrCmp(s1, s2));
1138   // One of arguments points to not allocated memory.
1139   EXPECT_DEATH(Ident(StrCmp)(s1 - 1, s2), LeftOOBErrorMessage(1));
1140   EXPECT_DEATH(Ident(StrCmp)(s1, s2 - 1), LeftOOBErrorMessage(1));
1141   EXPECT_DEATH(Ident(StrCmp)(s1 + size, s2), RightOOBErrorMessage(0));
1142   EXPECT_DEATH(Ident(StrCmp)(s1, s2 + size), RightOOBErrorMessage(0));
1143   // Hit unallocated memory and die.
1144   s2[size - 1] = 'z';
1145   EXPECT_DEATH(Ident(StrCmp)(s1, s1), RightOOBErrorMessage(0));
1146   EXPECT_DEATH(Ident(StrCmp)(s1 + size - 1, s2), RightOOBErrorMessage(0));
1147   free(s1);
1148   free(s2);
1149 }
1150 
TEST(AddressSanitizer,StrCmpOOBTest)1151 TEST(AddressSanitizer, StrCmpOOBTest) {
1152   RunStrCmpTest(&strcmp);
1153 }
1154 
TEST(AddressSanitizer,StrCaseCmpOOBTest)1155 TEST(AddressSanitizer, StrCaseCmpOOBTest) {
1156   RunStrCmpTest(&strcasecmp);
1157 }
1158 
1159 typedef int(*PointerToStrNCmp)(const char*, const char*, size_t);
RunStrNCmpTest(PointerToStrNCmp StrNCmp)1160 void RunStrNCmpTest(PointerToStrNCmp StrNCmp) {
1161   size_t size = Ident(100);
1162   char *s1 = MallocAndMemsetString(size);
1163   char *s2 = MallocAndMemsetString(size);
1164   s1[size - 1] = '\0';
1165   s2[size - 1] = '\0';
1166   // Normal StrNCmp calls
1167   Ident(StrNCmp(s1, s2, size + 2));
1168   s1[size - 1] = 'z';
1169   s2[size - 1] = 'x';
1170   Ident(StrNCmp(s1 + size - 2, s2 + size - 2, size));
1171   s2[size - 1] = 'z';
1172   Ident(StrNCmp(s1 - 1, s2 - 1, 0));
1173   Ident(StrNCmp(s1 + size - 1, s2 + size - 1, 1));
1174   // One of arguments points to not allocated memory.
1175   EXPECT_DEATH(Ident(StrNCmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1));
1176   EXPECT_DEATH(Ident(StrNCmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1));
1177   EXPECT_DEATH(Ident(StrNCmp)(s1 + size, s2, 1), RightOOBErrorMessage(0));
1178   EXPECT_DEATH(Ident(StrNCmp)(s1, s2 + size, 1), RightOOBErrorMessage(0));
1179   // Hit unallocated memory and die.
1180   EXPECT_DEATH(Ident(StrNCmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0));
1181   EXPECT_DEATH(Ident(StrNCmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0));
1182   free(s1);
1183   free(s2);
1184 }
1185 
TEST(AddressSanitizer,StrNCmpOOBTest)1186 TEST(AddressSanitizer, StrNCmpOOBTest) {
1187   RunStrNCmpTest(&strncmp);
1188 }
1189 
TEST(AddressSanitizer,StrNCaseCmpOOBTest)1190 TEST(AddressSanitizer, StrNCaseCmpOOBTest) {
1191   RunStrNCmpTest(&strncasecmp);
1192 }
1193 
TEST(AddressSanitizer,MemCmpOOBTest)1194 TEST(AddressSanitizer, MemCmpOOBTest) {
1195   size_t size = Ident(100);
1196   char *s1 = MallocAndMemsetString(size);
1197   char *s2 = MallocAndMemsetString(size);
1198   // Normal memcmp calls.
1199   Ident(memcmp(s1, s2, size));
1200   Ident(memcmp(s1 + size - 1, s2 + size - 1, 1));
1201   Ident(memcmp(s1 - 1, s2 - 1, 0));
1202   // One of arguments points to not allocated memory.
1203   EXPECT_DEATH(Ident(memcmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1));
1204   EXPECT_DEATH(Ident(memcmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1));
1205   EXPECT_DEATH(Ident(memcmp)(s1 + size, s2, 1), RightOOBErrorMessage(0));
1206   EXPECT_DEATH(Ident(memcmp)(s1, s2 + size, 1), RightOOBErrorMessage(0));
1207   // Hit unallocated memory and die.
1208   EXPECT_DEATH(Ident(memcmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0));
1209   EXPECT_DEATH(Ident(memcmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0));
1210   // Zero bytes are not terminators and don't prevent from OOB.
1211   s1[size - 1] = '\0';
1212   s2[size - 1] = '\0';
1213   EXPECT_DEATH(Ident(memcmp)(s1, s2, size + 1), RightOOBErrorMessage(0));
1214   free(s1);
1215   free(s2);
1216 }
1217 
TEST(AddressSanitizer,StrCatOOBTest)1218 TEST(AddressSanitizer, StrCatOOBTest) {
1219   size_t to_size = Ident(100);
1220   char *to = MallocAndMemsetString(to_size);
1221   to[0] = '\0';
1222   size_t from_size = Ident(20);
1223   char *from = MallocAndMemsetString(from_size);
1224   from[from_size - 1] = '\0';
1225   // Normal strcat calls.
1226   strcat(to, from);
1227   strcat(to, from);
1228   strcat(to + from_size, from + from_size - 2);
1229   // Passing an invalid pointer is an error even when concatenating an empty
1230   // string.
1231   EXPECT_DEATH(strcat(to - 1, from + from_size - 1), LeftOOBErrorMessage(1));
1232   // One of arguments points to not allocated memory.
1233   EXPECT_DEATH(strcat(to - 1, from), LeftOOBErrorMessage(1));
1234   EXPECT_DEATH(strcat(to, from - 1), LeftOOBErrorMessage(1));
1235   EXPECT_DEATH(strcat(to + to_size, from), RightOOBErrorMessage(0));
1236   EXPECT_DEATH(strcat(to, from + from_size), RightOOBErrorMessage(0));
1237 
1238   // "from" is not zero-terminated.
1239   from[from_size - 1] = 'z';
1240   EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
1241   from[from_size - 1] = '\0';
1242   // "to" is not zero-terminated.
1243   memset(to, 'z', to_size);
1244   EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
1245   // "to" is too short to fit "from".
1246   to[to_size - from_size + 1] = '\0';
1247   EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
1248   // length of "to" is just enough.
1249   strcat(to, from + 1);
1250 
1251   free(to);
1252   free(from);
1253 }
1254 
TEST(AddressSanitizer,StrNCatOOBTest)1255 TEST(AddressSanitizer, StrNCatOOBTest) {
1256   size_t to_size = Ident(100);
1257   char *to = MallocAndMemsetString(to_size);
1258   to[0] = '\0';
1259   size_t from_size = Ident(20);
1260   char *from = MallocAndMemsetString(from_size);
1261   // Normal strncat calls.
1262   strncat(to, from, 0);
1263   strncat(to, from, from_size);
1264   from[from_size - 1] = '\0';
1265   strncat(to, from, 2 * from_size);
1266   // Catenating empty string with an invalid string is still an error.
1267   EXPECT_DEATH(strncat(to - 1, from, 0), LeftOOBErrorMessage(1));
1268   strncat(to, from + from_size - 1, 10);
1269   // One of arguments points to not allocated memory.
1270   EXPECT_DEATH(strncat(to - 1, from, 2), LeftOOBErrorMessage(1));
1271   EXPECT_DEATH(strncat(to, from - 1, 2), LeftOOBErrorMessage(1));
1272   EXPECT_DEATH(strncat(to + to_size, from, 2), RightOOBErrorMessage(0));
1273   EXPECT_DEATH(strncat(to, from + from_size, 2), RightOOBErrorMessage(0));
1274 
1275   memset(from, 'z', from_size);
1276   memset(to, 'z', to_size);
1277   to[0] = '\0';
1278   // "from" is too short.
1279   EXPECT_DEATH(strncat(to, from, from_size + 1), RightOOBErrorMessage(0));
1280   // "to" is not zero-terminated.
1281   EXPECT_DEATH(strncat(to + 1, from, 1), RightOOBErrorMessage(0));
1282   // "to" is too short to fit "from".
1283   to[0] = 'z';
1284   to[to_size - from_size + 1] = '\0';
1285   EXPECT_DEATH(strncat(to, from, from_size - 1), RightOOBErrorMessage(0));
1286   // "to" is just enough.
1287   strncat(to, from, from_size - 2);
1288 
1289   free(to);
1290   free(from);
1291 }
1292 
OverlapErrorMessage(const string & func)1293 static string OverlapErrorMessage(const string &func) {
1294   return func + "-param-overlap";
1295 }
1296 
TEST(AddressSanitizer,StrArgsOverlapTest)1297 TEST(AddressSanitizer, StrArgsOverlapTest) {
1298   size_t size = Ident(100);
1299   char *str = Ident((char*)malloc(size));
1300 
1301 // Do not check memcpy() on OS X 10.7 and later, where it actually aliases
1302 // memmove().
1303 #if !defined(__APPLE__) || !defined(MAC_OS_X_VERSION_10_7) || \
1304     (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7)
1305   // Check "memcpy". Use Ident() to avoid inlining.
1306   memset(str, 'z', size);
1307   Ident(memcpy)(str + 1, str + 11, 10);
1308   Ident(memcpy)(str, str, 0);
1309   EXPECT_DEATH(Ident(memcpy)(str, str + 14, 15), OverlapErrorMessage("memcpy"));
1310   EXPECT_DEATH(Ident(memcpy)(str + 14, str, 15), OverlapErrorMessage("memcpy"));
1311 #endif
1312 
1313   // We do not treat memcpy with to==from as a bug.
1314   // See http://llvm.org/bugs/show_bug.cgi?id=11763.
1315   // EXPECT_DEATH(Ident(memcpy)(str + 20, str + 20, 1),
1316   //              OverlapErrorMessage("memcpy"));
1317 
1318   // Check "strcpy".
1319   memset(str, 'z', size);
1320   str[9] = '\0';
1321   strcpy(str + 10, str);
1322   EXPECT_DEATH(strcpy(str + 9, str), OverlapErrorMessage("strcpy"));
1323   EXPECT_DEATH(strcpy(str, str + 4), OverlapErrorMessage("strcpy"));
1324   strcpy(str, str + 5);
1325 
1326   // Check "strncpy".
1327   memset(str, 'z', size);
1328   strncpy(str, str + 10, 10);
1329   EXPECT_DEATH(strncpy(str, str + 9, 10), OverlapErrorMessage("strncpy"));
1330   EXPECT_DEATH(strncpy(str + 9, str, 10), OverlapErrorMessage("strncpy"));
1331   str[10] = '\0';
1332   strncpy(str + 11, str, 20);
1333   EXPECT_DEATH(strncpy(str + 10, str, 20), OverlapErrorMessage("strncpy"));
1334 
1335   // Check "strcat".
1336   memset(str, 'z', size);
1337   str[10] = '\0';
1338   str[20] = '\0';
1339   strcat(str, str + 10);
1340   EXPECT_DEATH(strcat(str, str + 11), OverlapErrorMessage("strcat"));
1341   str[10] = '\0';
1342   strcat(str + 11, str);
1343   EXPECT_DEATH(strcat(str, str + 9), OverlapErrorMessage("strcat"));
1344   EXPECT_DEATH(strcat(str + 9, str), OverlapErrorMessage("strcat"));
1345   EXPECT_DEATH(strcat(str + 10, str), OverlapErrorMessage("strcat"));
1346 
1347   // Check "strncat".
1348   memset(str, 'z', size);
1349   str[10] = '\0';
1350   strncat(str, str + 10, 10);  // from is empty
1351   EXPECT_DEATH(strncat(str, str + 11, 10), OverlapErrorMessage("strncat"));
1352   str[10] = '\0';
1353   str[20] = '\0';
1354   strncat(str + 5, str, 5);
1355   str[10] = '\0';
1356   EXPECT_DEATH(strncat(str + 5, str, 6), OverlapErrorMessage("strncat"));
1357   EXPECT_DEATH(strncat(str, str + 9, 10), OverlapErrorMessage("strncat"));
1358 
1359   free(str);
1360 }
1361 
CallAtoi(const char * nptr)1362 void CallAtoi(const char *nptr) {
1363   Ident(atoi(nptr));
1364 }
CallAtol(const char * nptr)1365 void CallAtol(const char *nptr) {
1366   Ident(atol(nptr));
1367 }
CallAtoll(const char * nptr)1368 void CallAtoll(const char *nptr) {
1369   Ident(atoll(nptr));
1370 }
1371 typedef void(*PointerToCallAtoi)(const char*);
1372 
RunAtoiOOBTest(PointerToCallAtoi Atoi)1373 void RunAtoiOOBTest(PointerToCallAtoi Atoi) {
1374   char *array = MallocAndMemsetString(10, '1');
1375   // Invalid pointer to the string.
1376   EXPECT_DEATH(Atoi(array + 11), RightOOBErrorMessage(1));
1377   EXPECT_DEATH(Atoi(array - 1), LeftOOBErrorMessage(1));
1378   // Die if a buffer doesn't have terminating NULL.
1379   EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0));
1380   // Make last symbol a terminating NULL or other non-digit.
1381   array[9] = '\0';
1382   Atoi(array);
1383   array[9] = 'a';
1384   Atoi(array);
1385   Atoi(array + 9);
1386   // Sometimes we need to detect overflow if no digits are found.
1387   memset(array, ' ', 10);
1388   EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0));
1389   array[9] = '-';
1390   EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0));
1391   EXPECT_DEATH(Atoi(array + 9), RightOOBErrorMessage(0));
1392   array[8] = '-';
1393   Atoi(array);
1394   delete array;
1395 }
1396 
TEST(AddressSanitizer,AtoiAndFriendsOOBTest)1397 TEST(AddressSanitizer, AtoiAndFriendsOOBTest) {
1398   RunAtoiOOBTest(&CallAtoi);
1399   RunAtoiOOBTest(&CallAtol);
1400   RunAtoiOOBTest(&CallAtoll);
1401 }
1402 
CallStrtol(const char * nptr,char ** endptr,int base)1403 void CallStrtol(const char *nptr, char **endptr, int base) {
1404   Ident(strtol(nptr, endptr, base));
1405 }
CallStrtoll(const char * nptr,char ** endptr,int base)1406 void CallStrtoll(const char *nptr, char **endptr, int base) {
1407   Ident(strtoll(nptr, endptr, base));
1408 }
1409 typedef void(*PointerToCallStrtol)(const char*, char**, int);
1410 
RunStrtolOOBTest(PointerToCallStrtol Strtol)1411 void RunStrtolOOBTest(PointerToCallStrtol Strtol) {
1412   char *array = MallocAndMemsetString(3);
1413   char *endptr = NULL;
1414   array[0] = '1';
1415   array[1] = '2';
1416   array[2] = '3';
1417   // Invalid pointer to the string.
1418   EXPECT_DEATH(Strtol(array + 3, NULL, 0), RightOOBErrorMessage(0));
1419   EXPECT_DEATH(Strtol(array - 1, NULL, 0), LeftOOBErrorMessage(1));
1420   // Buffer overflow if there is no terminating null (depends on base).
1421   Strtol(array, &endptr, 3);
1422   EXPECT_EQ(array + 2, endptr);
1423   EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0));
1424   array[2] = 'z';
1425   Strtol(array, &endptr, 35);
1426   EXPECT_EQ(array + 2, endptr);
1427   EXPECT_DEATH(Strtol(array, NULL, 36), RightOOBErrorMessage(0));
1428   // Add terminating zero to get rid of overflow.
1429   array[2] = '\0';
1430   Strtol(array, NULL, 36);
1431   // Don't check for overflow if base is invalid.
1432   Strtol(array - 1, NULL, -1);
1433   Strtol(array + 3, NULL, 1);
1434   // Sometimes we need to detect overflow if no digits are found.
1435   array[0] = array[1] = array[2] = ' ';
1436   EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0));
1437   array[2] = '+';
1438   EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0));
1439   array[2] = '-';
1440   EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0));
1441   array[1] = '+';
1442   Strtol(array, NULL, 0);
1443   array[1] = array[2] = 'z';
1444   Strtol(array, &endptr, 0);
1445   EXPECT_EQ(array, endptr);
1446   Strtol(array + 2, NULL, 0);
1447   EXPECT_EQ(array, endptr);
1448   delete array;
1449 }
1450 
TEST(AddressSanitizer,StrtollOOBTest)1451 TEST(AddressSanitizer, StrtollOOBTest) {
1452   RunStrtolOOBTest(&CallStrtoll);
1453 }
TEST(AddressSanitizer,StrtolOOBTest)1454 TEST(AddressSanitizer, StrtolOOBTest) {
1455   RunStrtolOOBTest(&CallStrtol);
1456 }
1457 
1458 // At the moment we instrument memcpy/memove/memset calls at compile time so we
1459 // can't handle OOB error if these functions are called by pointer, see disabled
1460 // MemIntrinsicCallByPointerTest below
1461 typedef void*(*PointerToMemTransfer)(void*, const void*, size_t);
1462 typedef void*(*PointerToMemSet)(void*, int, size_t);
1463 
CallMemSetByPointer(PointerToMemSet MemSet)1464 void CallMemSetByPointer(PointerToMemSet MemSet) {
1465   size_t size = Ident(100);
1466   char *array = Ident((char*)malloc(size));
1467   EXPECT_DEATH(MemSet(array, 0, 101), RightOOBErrorMessage(0));
1468   free(array);
1469 }
1470 
CallMemTransferByPointer(PointerToMemTransfer MemTransfer)1471 void CallMemTransferByPointer(PointerToMemTransfer MemTransfer) {
1472   size_t size = Ident(100);
1473   char *src = Ident((char*)malloc(size));
1474   char *dst = Ident((char*)malloc(size));
1475   EXPECT_DEATH(MemTransfer(dst, src, 101), RightOOBErrorMessage(0));
1476   free(src);
1477   free(dst);
1478 }
1479 
TEST(AddressSanitizer,DISABLED_MemIntrinsicCallByPointerTest)1480 TEST(AddressSanitizer, DISABLED_MemIntrinsicCallByPointerTest) {
1481   CallMemSetByPointer(&memset);
1482   CallMemTransferByPointer(&memcpy);
1483   CallMemTransferByPointer(&memmove);
1484 }
1485 
1486 // This test case fails
1487 // Clang optimizes memcpy/memset calls which lead to unaligned access
TEST(AddressSanitizer,DISABLED_MemIntrinsicUnalignedAccessTest)1488 TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) {
1489   int size = Ident(4096);
1490   char *s = Ident((char*)malloc(size));
1491   EXPECT_DEATH(memset(s + size - 1, 0, 2), RightOOBErrorMessage(0));
1492   free(s);
1493 }
1494 
1495 // TODO(samsonov): Add a test with malloc(0)
1496 // TODO(samsonov): Add tests for str* and mem* functions.
1497 
LargeFunction(bool do_bad_access)1498 NOINLINE static int LargeFunction(bool do_bad_access) {
1499   int *x = new int[100];
1500   x[0]++;
1501   x[1]++;
1502   x[2]++;
1503   x[3]++;
1504   x[4]++;
1505   x[5]++;
1506   x[6]++;
1507   x[7]++;
1508   x[8]++;
1509   x[9]++;
1510 
1511   x[do_bad_access ? 100 : 0]++; int res = __LINE__;
1512 
1513   x[10]++;
1514   x[11]++;
1515   x[12]++;
1516   x[13]++;
1517   x[14]++;
1518   x[15]++;
1519   x[16]++;
1520   x[17]++;
1521   x[18]++;
1522   x[19]++;
1523 
1524   delete x;
1525   return res;
1526 }
1527 
1528 // Test the we have correct debug info for the failing instruction.
1529 // This test requires the in-process symbolizer to be enabled by default.
TEST(AddressSanitizer,DISABLED_LargeFunctionSymbolizeTest)1530 TEST(AddressSanitizer, DISABLED_LargeFunctionSymbolizeTest) {
1531   int failing_line = LargeFunction(false);
1532   char expected_warning[128];
1533   sprintf(expected_warning, "LargeFunction.*asan_test.cc:%d", failing_line);
1534   EXPECT_DEATH(LargeFunction(true), expected_warning);
1535 }
1536 
1537 // Check that we unwind and symbolize correctly.
TEST(AddressSanitizer,DISABLED_MallocFreeUnwindAndSymbolizeTest)1538 TEST(AddressSanitizer, DISABLED_MallocFreeUnwindAndSymbolizeTest) {
1539   int *a = (int*)malloc_aaa(sizeof(int));
1540   *a = 1;
1541   free_aaa(a);
1542   EXPECT_DEATH(*a = 1, "free_ccc.*free_bbb.*free_aaa.*"
1543                "malloc_fff.*malloc_eee.*malloc_ddd");
1544 }
1545 
ThreadedTestAlloc(void * a)1546 void *ThreadedTestAlloc(void *a) {
1547   int **p = (int**)a;
1548   *p = new int;
1549   return 0;
1550 }
1551 
ThreadedTestFree(void * a)1552 void *ThreadedTestFree(void *a) {
1553   int **p = (int**)a;
1554   delete *p;
1555   return 0;
1556 }
1557 
ThreadedTestUse(void * a)1558 void *ThreadedTestUse(void *a) {
1559   int **p = (int**)a;
1560   **p = 1;
1561   return 0;
1562 }
1563 
ThreadedTestSpawn()1564 void ThreadedTestSpawn() {
1565   pthread_t t;
1566   int *x;
1567   pthread_create(&t, 0, ThreadedTestAlloc, &x);
1568   pthread_join(t, 0);
1569   pthread_create(&t, 0, ThreadedTestFree, &x);
1570   pthread_join(t, 0);
1571   pthread_create(&t, 0, ThreadedTestUse, &x);
1572   pthread_join(t, 0);
1573 }
1574 
TEST(AddressSanitizer,ThreadedTest)1575 TEST(AddressSanitizer, ThreadedTest) {
1576   EXPECT_DEATH(ThreadedTestSpawn(),
1577                ASAN_PCRE_DOTALL
1578                "Thread T.*created"
1579                ".*Thread T.*created"
1580                ".*Thread T.*created");
1581 }
1582 
1583 #if ASAN_NEEDS_SEGV
TEST(AddressSanitizer,ShadowGapTest)1584 TEST(AddressSanitizer, ShadowGapTest) {
1585 #if __WORDSIZE == 32
1586   char *addr = (char*)0x22000000;
1587 #else
1588   char *addr = (char*)0x0000100000080000;
1589 #endif
1590   EXPECT_DEATH(*addr = 1, "AddressSanitizer crashed on unknown");
1591 }
1592 #endif  // ASAN_NEEDS_SEGV
1593 
1594 extern "C" {
UseThenFreeThenUse()1595 NOINLINE static void UseThenFreeThenUse() {
1596   char *x = Ident((char*)malloc(8));
1597   *x = 1;
1598   free_aaa(x);
1599   *x = 2;
1600 }
1601 }
1602 
TEST(AddressSanitizer,UseThenFreeThenUseTest)1603 TEST(AddressSanitizer, UseThenFreeThenUseTest) {
1604   EXPECT_DEATH(UseThenFreeThenUse(), "freed by thread");
1605 }
1606 
TEST(AddressSanitizer,StrDupTest)1607 TEST(AddressSanitizer, StrDupTest) {
1608   free(strdup(Ident("123")));
1609 }
1610 
1611 // Currently we create and poison redzone at right of global variables.
1612 char glob5[5];
1613 static char static110[110];
1614 const char ConstGlob[7] = {1, 2, 3, 4, 5, 6, 7};
1615 static const char StaticConstGlob[3] = {9, 8, 7};
1616 extern int GlobalsTest(int x);
1617 
TEST(AddressSanitizer,GlobalTest)1618 TEST(AddressSanitizer, GlobalTest) {
1619   static char func_static15[15];
1620 
1621   static char fs1[10];
1622   static char fs2[10];
1623   static char fs3[10];
1624 
1625   glob5[Ident(0)] = 0;
1626   glob5[Ident(1)] = 0;
1627   glob5[Ident(2)] = 0;
1628   glob5[Ident(3)] = 0;
1629   glob5[Ident(4)] = 0;
1630 
1631   EXPECT_DEATH(glob5[Ident(5)] = 0,
1632                "0 bytes to the right of global variable.*glob5.* size 5");
1633   EXPECT_DEATH(glob5[Ident(5+6)] = 0,
1634                "6 bytes to the right of global variable.*glob5.* size 5");
1635   Ident(static110);  // avoid optimizations
1636   static110[Ident(0)] = 0;
1637   static110[Ident(109)] = 0;
1638   EXPECT_DEATH(static110[Ident(110)] = 0,
1639                "0 bytes to the right of global variable");
1640   EXPECT_DEATH(static110[Ident(110+7)] = 0,
1641                "7 bytes to the right of global variable");
1642 
1643   Ident(func_static15);  // avoid optimizations
1644   func_static15[Ident(0)] = 0;
1645   EXPECT_DEATH(func_static15[Ident(15)] = 0,
1646                "0 bytes to the right of global variable");
1647   EXPECT_DEATH(func_static15[Ident(15 + 9)] = 0,
1648                "9 bytes to the right of global variable");
1649 
1650   Ident(fs1);
1651   Ident(fs2);
1652   Ident(fs3);
1653 
1654   // We don't create left redzones, so this is not 100% guaranteed to fail.
1655   // But most likely will.
1656   EXPECT_DEATH(fs2[Ident(-1)] = 0, "is located.*of global variable");
1657 
1658   EXPECT_DEATH(Ident(Ident(ConstGlob)[8]),
1659                "is located 1 bytes to the right of .*ConstGlob");
1660   EXPECT_DEATH(Ident(Ident(StaticConstGlob)[5]),
1661                "is located 2 bytes to the right of .*StaticConstGlob");
1662 
1663   // call stuff from another file.
1664   GlobalsTest(0);
1665 }
1666 
TEST(AddressSanitizer,GlobalStringConstTest)1667 TEST(AddressSanitizer, GlobalStringConstTest) {
1668   static const char *zoo = "FOOBAR123";
1669   const char *p = Ident(zoo);
1670   EXPECT_DEATH(Ident(p[15]), "is ascii string 'FOOBAR123'");
1671 }
1672 
TEST(AddressSanitizer,FileNameInGlobalReportTest)1673 TEST(AddressSanitizer, FileNameInGlobalReportTest) {
1674   static char zoo[10];
1675   const char *p = Ident(zoo);
1676   // The file name should be present in the report.
1677   EXPECT_DEATH(Ident(p[15]), "zoo.*asan_test.cc");
1678 }
1679 
ReturnsPointerToALocalObject()1680 int *ReturnsPointerToALocalObject() {
1681   int a = 0;
1682   return Ident(&a);
1683 }
1684 
1685 #if ASAN_UAR == 1
TEST(AddressSanitizer,LocalReferenceReturnTest)1686 TEST(AddressSanitizer, LocalReferenceReturnTest) {
1687   int *(*f)() = Ident(ReturnsPointerToALocalObject);
1688   int *p = f();
1689   // Call 'f' a few more times, 'p' should still be poisoned.
1690   for (int i = 0; i < 32; i++)
1691     f();
1692   EXPECT_DEATH(*p = 1, "AddressSanitizer stack-use-after-return");
1693   EXPECT_DEATH(*p = 1, "is located.*in frame .*ReturnsPointerToALocal");
1694 }
1695 #endif
1696 
1697 template <int kSize>
FuncWithStack()1698 NOINLINE static void FuncWithStack() {
1699   char x[kSize];
1700   Ident(x)[0] = 0;
1701   Ident(x)[kSize-1] = 0;
1702 }
1703 
LotsOfStackReuse()1704 static void LotsOfStackReuse() {
1705   int LargeStack[10000];
1706   Ident(LargeStack)[0] = 0;
1707   for (int i = 0; i < 10000; i++) {
1708     FuncWithStack<128 * 1>();
1709     FuncWithStack<128 * 2>();
1710     FuncWithStack<128 * 4>();
1711     FuncWithStack<128 * 8>();
1712     FuncWithStack<128 * 16>();
1713     FuncWithStack<128 * 32>();
1714     FuncWithStack<128 * 64>();
1715     FuncWithStack<128 * 128>();
1716     FuncWithStack<128 * 256>();
1717     FuncWithStack<128 * 512>();
1718     Ident(LargeStack)[0] = 0;
1719   }
1720 }
1721 
TEST(AddressSanitizer,StressStackReuseTest)1722 TEST(AddressSanitizer, StressStackReuseTest) {
1723   LotsOfStackReuse();
1724 }
1725 
TEST(AddressSanitizer,ThreadedStressStackReuseTest)1726 TEST(AddressSanitizer, ThreadedStressStackReuseTest) {
1727   const int kNumThreads = 20;
1728   pthread_t t[kNumThreads];
1729   for (int i = 0; i < kNumThreads; i++) {
1730     pthread_create(&t[i], 0, (void* (*)(void *x))LotsOfStackReuse, 0);
1731   }
1732   for (int i = 0; i < kNumThreads; i++) {
1733     pthread_join(t[i], 0);
1734   }
1735 }
1736 
PthreadExit(void * a)1737 static void *PthreadExit(void *a) {
1738   pthread_exit(0);
1739   return 0;
1740 }
1741 
TEST(AddressSanitizer,PthreadExitTest)1742 TEST(AddressSanitizer, PthreadExitTest) {
1743   pthread_t t;
1744   for (int i = 0; i < 1000; i++) {
1745     pthread_create(&t, 0, PthreadExit, 0);
1746     pthread_join(t, 0);
1747   }
1748 }
1749 
1750 #ifdef __EXCEPTIONS
StackReuseAndException()1751 NOINLINE static void StackReuseAndException() {
1752   int large_stack[1000];
1753   Ident(large_stack);
1754   ASAN_THROW(1);
1755 }
1756 
1757 // TODO(kcc): support exceptions with use-after-return.
TEST(AddressSanitizer,DISABLED_StressStackReuseAndExceptionsTest)1758 TEST(AddressSanitizer, DISABLED_StressStackReuseAndExceptionsTest) {
1759   for (int i = 0; i < 10000; i++) {
1760     try {
1761     StackReuseAndException();
1762     } catch(...) {
1763     }
1764   }
1765 }
1766 #endif
1767 
TEST(AddressSanitizer,MlockTest)1768 TEST(AddressSanitizer, MlockTest) {
1769   EXPECT_EQ(0, mlockall(MCL_CURRENT));
1770   EXPECT_EQ(0, mlock((void*)0x12345, 0x5678));
1771   EXPECT_EQ(0, munlockall());
1772   EXPECT_EQ(0, munlock((void*)0x987, 0x654));
1773 }
1774 
1775 struct LargeStruct {
1776   int foo[100];
1777 };
1778 
1779 // Test for bug http://llvm.org/bugs/show_bug.cgi?id=11763.
1780 // Struct copy should not cause asan warning even if lhs == rhs.
TEST(AddressSanitizer,LargeStructCopyTest)1781 TEST(AddressSanitizer, LargeStructCopyTest) {
1782   LargeStruct a;
1783   *Ident(&a) = *Ident(&a);
1784 }
1785 
1786 __attribute__((no_address_safety_analysis))
NoAddressSafety()1787 static void NoAddressSafety() {
1788   char *foo = new char[10];
1789   Ident(foo)[10] = 0;
1790   delete [] foo;
1791 }
1792 
TEST(AddressSanitizer,AttributeNoAddressSafetyTest)1793 TEST(AddressSanitizer, AttributeNoAddressSafetyTest) {
1794   Ident(NoAddressSafety)();
1795 }
1796 
1797 // ------------------ demo tests; run each one-by-one -------------
1798 // e.g. --gtest_filter=*DemoOOBLeftHigh --gtest_also_run_disabled_tests
TEST(AddressSanitizer,DISABLED_DemoThreadedTest)1799 TEST(AddressSanitizer, DISABLED_DemoThreadedTest) {
1800   ThreadedTestSpawn();
1801 }
1802 
SimpleBugOnSTack(void * x=0)1803 void *SimpleBugOnSTack(void *x = 0) {
1804   char a[20];
1805   Ident(a)[20] = 0;
1806   return 0;
1807 }
1808 
TEST(AddressSanitizer,DISABLED_DemoStackTest)1809 TEST(AddressSanitizer, DISABLED_DemoStackTest) {
1810   SimpleBugOnSTack();
1811 }
1812 
TEST(AddressSanitizer,DISABLED_DemoThreadStackTest)1813 TEST(AddressSanitizer, DISABLED_DemoThreadStackTest) {
1814   pthread_t t;
1815   pthread_create(&t, 0, SimpleBugOnSTack, 0);
1816   pthread_join(t, 0);
1817 }
1818 
TEST(AddressSanitizer,DISABLED_DemoUAFLowIn)1819 TEST(AddressSanitizer, DISABLED_DemoUAFLowIn) {
1820   uaf_test<U1>(10, 0);
1821 }
TEST(AddressSanitizer,DISABLED_DemoUAFLowLeft)1822 TEST(AddressSanitizer, DISABLED_DemoUAFLowLeft) {
1823   uaf_test<U1>(10, -2);
1824 }
TEST(AddressSanitizer,DISABLED_DemoUAFLowRight)1825 TEST(AddressSanitizer, DISABLED_DemoUAFLowRight) {
1826   uaf_test<U1>(10, 10);
1827 }
1828 
TEST(AddressSanitizer,DISABLED_DemoUAFHigh)1829 TEST(AddressSanitizer, DISABLED_DemoUAFHigh) {
1830   uaf_test<U1>(kLargeMalloc, 0);
1831 }
1832 
TEST(AddressSanitizer,DISABLED_DemoOOBLeftLow)1833 TEST(AddressSanitizer, DISABLED_DemoOOBLeftLow) {
1834   oob_test<U1>(10, -1);
1835 }
1836 
TEST(AddressSanitizer,DISABLED_DemoOOBLeftHigh)1837 TEST(AddressSanitizer, DISABLED_DemoOOBLeftHigh) {
1838   oob_test<U1>(kLargeMalloc, -1);
1839 }
1840 
TEST(AddressSanitizer,DISABLED_DemoOOBRightLow)1841 TEST(AddressSanitizer, DISABLED_DemoOOBRightLow) {
1842   oob_test<U1>(10, 10);
1843 }
1844 
TEST(AddressSanitizer,DISABLED_DemoOOBRightHigh)1845 TEST(AddressSanitizer, DISABLED_DemoOOBRightHigh) {
1846   oob_test<U1>(kLargeMalloc, kLargeMalloc);
1847 }
1848 
TEST(AddressSanitizer,DISABLED_DemoOOM)1849 TEST(AddressSanitizer, DISABLED_DemoOOM) {
1850   size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 40) : (0xf0000000);
1851   printf("%p\n", malloc(size));
1852 }
1853 
TEST(AddressSanitizer,DISABLED_DemoDoubleFreeTest)1854 TEST(AddressSanitizer, DISABLED_DemoDoubleFreeTest) {
1855   DoubleFree();
1856 }
1857 
TEST(AddressSanitizer,DISABLED_DemoNullDerefTest)1858 TEST(AddressSanitizer, DISABLED_DemoNullDerefTest) {
1859   int *a = 0;
1860   Ident(a)[10] = 0;
1861 }
1862 
TEST(AddressSanitizer,DISABLED_DemoFunctionStaticTest)1863 TEST(AddressSanitizer, DISABLED_DemoFunctionStaticTest) {
1864   static char a[100];
1865   static char b[100];
1866   static char c[100];
1867   Ident(a);
1868   Ident(b);
1869   Ident(c);
1870   Ident(a)[5] = 0;
1871   Ident(b)[105] = 0;
1872   Ident(a)[5] = 0;
1873 }
1874 
TEST(AddressSanitizer,DISABLED_DemoTooMuchMemoryTest)1875 TEST(AddressSanitizer, DISABLED_DemoTooMuchMemoryTest) {
1876   const size_t kAllocSize = (1 << 28) - 1024;
1877   size_t total_size = 0;
1878   while (true) {
1879     char *x = (char*)malloc(kAllocSize);
1880     memset(x, 0, kAllocSize);
1881     total_size += kAllocSize;
1882     fprintf(stderr, "total: %ldM %p\n", (long)total_size >> 20, x);
1883   }
1884 }
1885 
1886 // http://code.google.com/p/address-sanitizer/issues/detail?id=66
TEST(AddressSanitizer,BufferOverflowAfterManyFrees)1887 TEST(AddressSanitizer, BufferOverflowAfterManyFrees) {
1888   for (int i = 0; i < 1000000; i++) {
1889     delete [] (Ident(new char [8644]));
1890   }
1891   char *x = new char[8192];
1892   EXPECT_DEATH(x[Ident(8192)] = 0, "AddressSanitizer heap-buffer-overflow");
1893   delete [] Ident(x);
1894 }
1895 
1896 #ifdef __APPLE__
1897 #include "asan_mac_test.h"
TEST(AddressSanitizerMac,CFAllocatorDefaultDoubleFree)1898 TEST(AddressSanitizerMac, CFAllocatorDefaultDoubleFree) {
1899   EXPECT_DEATH(
1900       CFAllocatorDefaultDoubleFree(NULL),
1901       "attempting double-free");
1902 }
1903 
CFAllocator_DoubleFreeOnPthread()1904 void CFAllocator_DoubleFreeOnPthread() {
1905   pthread_t child;
1906   pthread_create(&child, NULL, CFAllocatorDefaultDoubleFree, NULL);
1907   pthread_join(child, NULL);  // Shouldn't be reached.
1908 }
1909 
TEST(AddressSanitizerMac,CFAllocatorDefaultDoubleFree_ChildPhread)1910 TEST(AddressSanitizerMac, CFAllocatorDefaultDoubleFree_ChildPhread) {
1911   EXPECT_DEATH(CFAllocator_DoubleFreeOnPthread(), "attempting double-free");
1912 }
1913 
1914 namespace {
1915 
1916 void *GLOB;
1917 
CFAllocatorAllocateToGlob(void * unused)1918 void *CFAllocatorAllocateToGlob(void *unused) {
1919   GLOB = CFAllocatorAllocate(NULL, 100, /*hint*/0);
1920   return NULL;
1921 }
1922 
CFAllocatorDeallocateFromGlob(void * unused)1923 void *CFAllocatorDeallocateFromGlob(void *unused) {
1924   char *p = (char*)GLOB;
1925   p[100] = 'A';  // ASan should report an error here.
1926   CFAllocatorDeallocate(NULL, GLOB);
1927   return NULL;
1928 }
1929 
CFAllocator_PassMemoryToAnotherThread()1930 void CFAllocator_PassMemoryToAnotherThread() {
1931   pthread_t th1, th2;
1932   pthread_create(&th1, NULL, CFAllocatorAllocateToGlob, NULL);
1933   pthread_join(th1, NULL);
1934   pthread_create(&th2, NULL, CFAllocatorDeallocateFromGlob, NULL);
1935   pthread_join(th2, NULL);
1936 }
1937 
TEST(AddressSanitizerMac,CFAllocator_PassMemoryToAnotherThread)1938 TEST(AddressSanitizerMac, CFAllocator_PassMemoryToAnotherThread) {
1939   EXPECT_DEATH(CFAllocator_PassMemoryToAnotherThread(),
1940                "heap-buffer-overflow");
1941 }
1942 
1943 }  // namespace
1944 
1945 // TODO(glider): figure out whether we still need these tests. Is it correct
1946 // to intercept the non-default CFAllocators?
TEST(AddressSanitizerMac,DISABLED_CFAllocatorSystemDefaultDoubleFree)1947 TEST(AddressSanitizerMac, DISABLED_CFAllocatorSystemDefaultDoubleFree) {
1948   EXPECT_DEATH(
1949       CFAllocatorSystemDefaultDoubleFree(),
1950       "attempting double-free");
1951 }
1952 
1953 // We're intercepting malloc, so kCFAllocatorMalloc is routed to ASan.
TEST(AddressSanitizerMac,CFAllocatorMallocDoubleFree)1954 TEST(AddressSanitizerMac, CFAllocatorMallocDoubleFree) {
1955   EXPECT_DEATH(CFAllocatorMallocDoubleFree(), "attempting double-free");
1956 }
1957 
TEST(AddressSanitizerMac,DISABLED_CFAllocatorMallocZoneDoubleFree)1958 TEST(AddressSanitizerMac, DISABLED_CFAllocatorMallocZoneDoubleFree) {
1959   EXPECT_DEATH(CFAllocatorMallocZoneDoubleFree(), "attempting double-free");
1960 }
1961 
TEST(AddressSanitizerMac,GCDDispatchAsync)1962 TEST(AddressSanitizerMac, GCDDispatchAsync) {
1963   // Make sure the whole ASan report is printed, i.e. that we don't die
1964   // on a CHECK.
1965   EXPECT_DEATH(TestGCDDispatchAsync(), "Shadow byte and word");
1966 }
1967 
TEST(AddressSanitizerMac,GCDDispatchSync)1968 TEST(AddressSanitizerMac, GCDDispatchSync) {
1969   // Make sure the whole ASan report is printed, i.e. that we don't die
1970   // on a CHECK.
1971   EXPECT_DEATH(TestGCDDispatchSync(), "Shadow byte and word");
1972 }
1973 
1974 
TEST(AddressSanitizerMac,GCDReuseWqthreadsAsync)1975 TEST(AddressSanitizerMac, GCDReuseWqthreadsAsync) {
1976   // Make sure the whole ASan report is printed, i.e. that we don't die
1977   // on a CHECK.
1978   EXPECT_DEATH(TestGCDReuseWqthreadsAsync(), "Shadow byte and word");
1979 }
1980 
TEST(AddressSanitizerMac,GCDReuseWqthreadsSync)1981 TEST(AddressSanitizerMac, GCDReuseWqthreadsSync) {
1982   // Make sure the whole ASan report is printed, i.e. that we don't die
1983   // on a CHECK.
1984   EXPECT_DEATH(TestGCDReuseWqthreadsSync(), "Shadow byte and word");
1985 }
1986 
TEST(AddressSanitizerMac,GCDDispatchAfter)1987 TEST(AddressSanitizerMac, GCDDispatchAfter) {
1988   // Make sure the whole ASan report is printed, i.e. that we don't die
1989   // on a CHECK.
1990   EXPECT_DEATH(TestGCDDispatchAfter(), "Shadow byte and word");
1991 }
1992 
TEST(AddressSanitizerMac,GCDSourceEvent)1993 TEST(AddressSanitizerMac, GCDSourceEvent) {
1994   // Make sure the whole ASan report is printed, i.e. that we don't die
1995   // on a CHECK.
1996   EXPECT_DEATH(TestGCDSourceEvent(), "Shadow byte and word");
1997 }
1998 
TEST(AddressSanitizerMac,GCDSourceCancel)1999 TEST(AddressSanitizerMac, GCDSourceCancel) {
2000   // Make sure the whole ASan report is printed, i.e. that we don't die
2001   // on a CHECK.
2002   EXPECT_DEATH(TestGCDSourceCancel(), "Shadow byte and word");
2003 }
2004 
TEST(AddressSanitizerMac,GCDGroupAsync)2005 TEST(AddressSanitizerMac, GCDGroupAsync) {
2006   // Make sure the whole ASan report is printed, i.e. that we don't die
2007   // on a CHECK.
2008   EXPECT_DEATH(TestGCDGroupAsync(), "Shadow byte and word");
2009 }
2010 
MallocIntrospectionLockWorker(void * _)2011 void *MallocIntrospectionLockWorker(void *_) {
2012   const int kNumPointers = 100;
2013   int i;
2014   void *pointers[kNumPointers];
2015   for (i = 0; i < kNumPointers; i++) {
2016     pointers[i] = malloc(i + 1);
2017   }
2018   for (i = 0; i < kNumPointers; i++) {
2019     free(pointers[i]);
2020   }
2021 
2022   return NULL;
2023 }
2024 
MallocIntrospectionLockForker(void * _)2025 void *MallocIntrospectionLockForker(void *_) {
2026   pid_t result = fork();
2027   if (result == -1) {
2028     perror("fork");
2029   }
2030   assert(result != -1);
2031   if (result == 0) {
2032     // Call malloc in the child process to make sure we won't deadlock.
2033     void *ptr = malloc(42);
2034     free(ptr);
2035     exit(0);
2036   } else {
2037     // Return in the parent process.
2038     return NULL;
2039   }
2040 }
2041 
TEST(AddressSanitizerMac,MallocIntrospectionLock)2042 TEST(AddressSanitizerMac, MallocIntrospectionLock) {
2043   // Incorrect implementation of force_lock and force_unlock in our malloc zone
2044   // will cause forked processes to deadlock.
2045   // TODO(glider): need to detect that none of the child processes deadlocked.
2046   const int kNumWorkers = 5, kNumIterations = 100;
2047   int i, iter;
2048   for (iter = 0; iter < kNumIterations; iter++) {
2049     pthread_t workers[kNumWorkers], forker;
2050     for (i = 0; i < kNumWorkers; i++) {
2051       pthread_create(&workers[i], 0, MallocIntrospectionLockWorker, 0);
2052     }
2053     pthread_create(&forker, 0, MallocIntrospectionLockForker, 0);
2054     for (i = 0; i < kNumWorkers; i++) {
2055       pthread_join(workers[i], 0);
2056     }
2057     pthread_join(forker, 0);
2058   }
2059 }
2060 
TSDAllocWorker(void * test_key)2061 void *TSDAllocWorker(void *test_key) {
2062   if (test_key) {
2063     void *mem = malloc(10);
2064     pthread_setspecific(*(pthread_key_t*)test_key, mem);
2065   }
2066   return NULL;
2067 }
2068 
TEST(AddressSanitizerMac,DISABLED_TSDWorkqueueTest)2069 TEST(AddressSanitizerMac, DISABLED_TSDWorkqueueTest) {
2070   pthread_t th;
2071   pthread_key_t test_key;
2072   pthread_key_create(&test_key, CallFreeOnWorkqueue);
2073   pthread_create(&th, NULL, TSDAllocWorker, &test_key);
2074   pthread_join(th, NULL);
2075   pthread_key_delete(test_key);
2076 }
2077 
2078 // Test that CFStringCreateCopy does not copy constant strings.
TEST(AddressSanitizerMac,CFStringCreateCopy)2079 TEST(AddressSanitizerMac, CFStringCreateCopy) {
2080   CFStringRef str = CFSTR("Hello world!\n");
2081   CFStringRef str2 = CFStringCreateCopy(0, str);
2082   EXPECT_EQ(str, str2);
2083 }
2084 
TEST(AddressSanitizerMac,NSObjectOOB)2085 TEST(AddressSanitizerMac, NSObjectOOB) {
2086   // Make sure that our allocators are used for NSObjects.
2087   EXPECT_DEATH(TestOOBNSObjects(), "heap-buffer-overflow");
2088 }
2089 
2090 // Make sure that correct pointer is passed to free() when deallocating a
2091 // NSURL object.
2092 // See http://code.google.com/p/address-sanitizer/issues/detail?id=70.
TEST(AddressSanitizerMac,NSURLDeallocation)2093 TEST(AddressSanitizerMac, NSURLDeallocation) {
2094   TestNSURLDeallocation();
2095 }
2096 #endif  // __APPLE__
2097 
2098 // Test that instrumentation of stack allocations takes into account
2099 // AllocSize of a type, and not its StoreSize (16 vs 10 bytes for long double).
2100 // See http://llvm.org/bugs/show_bug.cgi?id=12047 for more details.
TEST(AddressSanitizer,LongDoubleNegativeTest)2101 TEST(AddressSanitizer, LongDoubleNegativeTest) {
2102   long double a, b;
2103   static long double c;
2104   memcpy(Ident(&a), Ident(&b), sizeof(long double));
2105   memcpy(Ident(&c), Ident(&b), sizeof(long double));
2106 };
2107 
main(int argc,char ** argv)2108 int main(int argc, char **argv) {
2109   progname = argv[0];
2110   testing::GTEST_FLAG(death_test_style) = "threadsafe";
2111   testing::InitGoogleTest(&argc, argv);
2112   return RUN_ALL_TESTS();
2113 }
2114