| 1 | // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core,unix.API,osx.API,optin.portability %s -analyzer-store=region -analyzer-output=plist -analyzer-config faux-bodies=true -fblocks -verify -o %t.plist |
| 2 | // RUN: cat %t.plist | %diff_plist %S/Inputs/expected-plists/unix-fns.c.plist - |
| 3 | // RUN: mkdir -p %t.dir |
| 4 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.API,osx.API,optin.portability -analyzer-output=html -analyzer-config faux-bodies=true -fblocks -o %t.dir %s |
| 5 | // RUN: rm -fR %t.dir |
| 6 | |
| 7 | |
| 8 | struct _opaque_pthread_once_t { |
| 9 | long __sig; |
| 10 | char __opaque[8]; |
| 11 | }; |
| 12 | typedef struct _opaque_pthread_once_t __darwin_pthread_once_t; |
| 13 | typedef __darwin_pthread_once_t pthread_once_t; |
| 14 | int pthread_once(pthread_once_t *, void (*)(void)); |
| 15 | typedef long unsigned int __darwin_size_t; |
| 16 | typedef __darwin_size_t size_t; |
| 17 | void *calloc(size_t, size_t); |
| 18 | void *malloc(size_t); |
| 19 | void *realloc(void *, size_t); |
| 20 | void *reallocf(void *, size_t); |
| 21 | void *alloca(size_t); |
| 22 | void *valloc(size_t); |
| 23 | typedef union { |
| 24 | struct _os_object_s *_os_obj; |
| 25 | struct dispatch_object_s *_do; |
| 26 | struct dispatch_continuation_s *_dc; |
| 27 | struct dispatch_queue_s *_dq; |
| 28 | struct dispatch_queue_attr_s *_dqa; |
| 29 | struct dispatch_group_s *_dg; |
| 30 | struct dispatch_source_s *_ds; |
| 31 | struct dispatch_source_attr_s *_dsa; |
| 32 | struct dispatch_semaphore_s *_dsema; |
| 33 | struct dispatch_data_s *_ddata; |
| 34 | struct dispatch_io_s *_dchannel; |
| 35 | struct dispatch_operation_s *_doperation; |
| 36 | struct dispatch_disk_s *_ddisk; |
| 37 | } dispatch_object_t __attribute__((__transparent_union__)); |
| 38 | typedef void (^dispatch_block_t)(void); |
| 39 | typedef struct dispatch_queue_s *dispatch_queue_t; |
| 40 | void dispatch_sync(dispatch_queue_t queue, dispatch_block_t block); |
| 41 | |
| 42 | typedef long dispatch_once_t; |
| 43 | |
| 44 | extern |
| 45 | __attribute__((__nonnull__)) |
| 46 | __attribute__((__nothrow__)) |
| 47 | void dispatch_once(dispatch_once_t *predicate, |
| 48 | __attribute__((__noescape__)) dispatch_block_t block); |
| 49 | |
| 50 | // Inlined fast-path dispatch_once defers to the real dispatch_once |
| 51 | // on the slow path. |
| 52 | static |
| 53 | __inline__ |
| 54 | __attribute__((__always_inline__)) |
| 55 | __attribute__((__nonnull__)) |
| 56 | __attribute__((__nothrow__)) |
| 57 | void _dispatch_once(dispatch_once_t *predicate, |
| 58 | __attribute__((__noescape__)) dispatch_block_t block) |
| 59 | { |
| 60 | if (__builtin_expect((*predicate), (~0l)) != ~0l) { |
| 61 | dispatch_once(predicate, block); |
| 62 | } else { |
| 63 | __asm__ __volatile__("" ::: "memory"); |
| 64 | } |
| 65 | __builtin_assume(*predicate == ~0l); |
| 66 | } |
| 67 | |
| 68 | // Macro so that user calls to dispatch_once() call the inlined fast-path |
| 69 | // variant. |
| 70 | #undef dispatch_once |
| 71 | #define dispatch_once _dispatch_once |
| 72 | |
| 73 | #ifndef O_CREAT |
| 74 | #define O_CREAT 0x0200 |
| 75 | #define O_RDONLY 0x0000 |
| 76 | #endif |
| 77 | int open(const char *, int, ...); |
| 78 | int openat(int, const char *, int, ...); |
| 79 | int close(int fildes); |
| 80 | |
| 81 | void test_open(const char *path) { |
| 82 | int fd; |
| 83 | fd = open(path, O_RDONLY); // no-warning |
| 84 | if (!fd) |
| 85 | close(fd); |
| 86 | |
| 87 | fd = open(path, O_CREAT); // expected-warning{{Call to 'open' requires a 3rd argument when the 'O_CREAT' flag is set}} |
| 88 | if (!fd) |
| 89 | close(fd); |
| 90 | } |
| 91 | |
| 92 | void test_open_at(int directory_fd, const char *relative_path) { |
| 93 | int fd; |
| 94 | fd = openat(directory_fd, relative_path, O_RDONLY); // no-warning |
| 95 | if (!fd) |
| 96 | close(fd); |
| 97 | |
| 98 | fd = openat(directory_fd, relative_path, O_CREAT); // expected-warning{{Call to 'openat' requires a 4th argument when the 'O_CREAT' flag is set}} |
| 99 | if (!fd) |
| 100 | close(fd); |
| 101 | } |
| 102 | |
| 103 | void test_dispatch_once() { |
| 104 | dispatch_once_t pred = 0; |
| 105 | do { if (__builtin_expect(*(&pred), ~0l) != ~0l) dispatch_once((&pred), (^() {})); } while (0); // expected-warning{{Call to 'dispatch_once' uses the local variable 'pred' for the predicate value}} |
| 106 | } |
| 107 | void test_dispatch_once_neg() { |
| 108 | static dispatch_once_t pred = 0; |
| 109 | do { if (__builtin_expect(*(&pred), ~0l) != ~0l) dispatch_once((&pred), (^() {})); } while (0); // no-warning |
| 110 | } |
| 111 | |
| 112 | void test_pthread_once_aux(); |
| 113 | |
| 114 | void test_pthread_once() { |
| 115 | pthread_once_t pred = {0x30B1BCBA, {0}}; |
| 116 | pthread_once(&pred, test_pthread_once_aux); // expected-warning{{Call to 'pthread_once' uses the local variable 'pred' for the "control" value}} |
| 117 | } |
| 118 | void test_pthread_once_neg() { |
| 119 | static pthread_once_t pred = {0x30B1BCBA, {0}}; |
| 120 | pthread_once(&pred, test_pthread_once_aux); // no-warning |
| 121 | } |
| 122 | |
| 123 | // PR 2899 - warn of zero-sized allocations to malloc(). |
| 124 | void pr2899() { |
| 125 | char* foo = malloc(0); // expected-warning{{Call to 'malloc' has an allocation size of 0 bytes}} |
| 126 | for (unsigned i = 0; i < 100; i++) { |
| 127 | foo[i] = 0; |
| 128 | } |
| 129 | } |
| 130 | void pr2899_nowarn(size_t size) { |
| 131 | char* foo = malloc(size); // no-warning |
| 132 | for (unsigned i = 0; i < 100; i++) { |
| 133 | foo[i] = 0; |
| 134 | } |
| 135 | } |
| 136 | void test_calloc(void) { |
| 137 | char *foo = calloc(0, 42); // expected-warning{{Call to 'calloc' has an allocation size of 0 bytes}} |
| 138 | for (unsigned i = 0; i < 100; i++) { |
| 139 | foo[i] = 0; |
| 140 | } |
| 141 | } |
| 142 | void test_calloc2(void) { |
| 143 | char *foo = calloc(42, 0); // expected-warning{{Call to 'calloc' has an allocation size of 0 bytes}} |
| 144 | for (unsigned i = 0; i < 100; i++) { |
| 145 | foo[i] = 0; |
| 146 | } |
| 147 | } |
| 148 | void test_calloc_nowarn(size_t nmemb, size_t size) { |
| 149 | char *foo = calloc(nmemb, size); // no-warning |
| 150 | for (unsigned i = 0; i < 100; i++) { |
| 151 | foo[i] = 0; |
| 152 | } |
| 153 | } |
| 154 | void test_realloc(char *ptr) { |
| 155 | char *foo = realloc(ptr, 0); // expected-warning{{Call to 'realloc' has an allocation size of 0 bytes}} |
| 156 | for (unsigned i = 0; i < 100; i++) { |
| 157 | foo[i] = 0; |
| 158 | } |
| 159 | } |
| 160 | void test_reallocf(char *ptr) { |
| 161 | char *foo = reallocf(ptr, 0); // expected-warning{{Call to 'reallocf' has an allocation size of 0 bytes}} |
| 162 | for (unsigned i = 0; i < 100; i++) { |
| 163 | foo[i] = 0; |
| 164 | } |
| 165 | } |
| 166 | void test_realloc_nowarn(char *ptr, size_t size) { |
| 167 | char *foo = realloc(ptr, size); // no-warning |
| 168 | for (unsigned i = 0; i < 100; i++) { |
| 169 | foo[i] = 0; |
| 170 | } |
| 171 | } |
| 172 | void test_reallocf_nowarn(char *ptr, size_t size) { |
| 173 | char *foo = reallocf(ptr, size); // no-warning |
| 174 | for (unsigned i = 0; i < 100; i++) { |
| 175 | foo[i] = 0; |
| 176 | } |
| 177 | } |
| 178 | void test_alloca() { |
| 179 | char *foo = alloca(0); // expected-warning{{Call to 'alloca' has an allocation size of 0 bytes}} |
| 180 | for(unsigned i = 0; i < 100; i++) { |
| 181 | foo[i] = 0; |
| 182 | } |
| 183 | } |
| 184 | void test_alloca_nowarn(size_t sz) { |
| 185 | char *foo = alloca(sz); // no-warning |
| 186 | for(unsigned i = 0; i < 100; i++) { |
| 187 | foo[i] = 0; |
| 188 | } |
| 189 | } |
| 190 | void test_builtin_alloca() { |
| 191 | char *foo2 = __builtin_alloca(0); // expected-warning{{Call to 'alloca' has an allocation size of 0 bytes}} |
| 192 | for(unsigned i = 0; i < 100; i++) { |
| 193 | foo2[i] = 0; |
| 194 | } |
| 195 | } |
| 196 | void test_builtin_alloca_nowarn(size_t sz) { |
| 197 | char *foo2 = __builtin_alloca(sz); // no-warning |
| 198 | for(unsigned i = 0; i < 100; i++) { |
| 199 | foo2[i] = 0; |
| 200 | } |
| 201 | } |
| 202 | void test_valloc() { |
| 203 | char *foo = valloc(0); // expected-warning{{Call to 'valloc' has an allocation size of 0 bytes}} |
| 204 | for(unsigned i = 0; i < 100; i++) { |
| 205 | foo[i] = 0; |
| 206 | } |
| 207 | } |
| 208 | void test_valloc_nowarn(size_t sz) { |
| 209 | char *foo = valloc(sz); // no-warning |
| 210 | for(unsigned i = 0; i < 100; i++) { |
| 211 | foo[i] = 0; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | void test_dispatch_once_in_macro() { |
| 216 | dispatch_once_t pred = 0; |
| 217 | dispatch_once(&pred, ^(){}); // expected-warning {{Call to 'dispatch_once' uses the local variable 'pred' for the predicate value}} |
| 218 | } |
| 219 | |
| 220 | // Test inlining of dispatch_sync. |
| 221 | void test_dispatch_sync(dispatch_queue_t queue, int *q) { |
| 222 | int *p = 0; |
| 223 | dispatch_sync(queue, ^(void){ |
| 224 | if (q) { |
| 225 | *p = 1; // expected-warning {{null pointer}} |
| 226 | } |
| 227 | }); |
| 228 | } |
| 229 | |
| 230 | // Test inlining of dispatch_once. |
| 231 | void test_inline_dispatch_once() { |
| 232 | static dispatch_once_t pred; |
| 233 | int *p = 0; |
| 234 | dispatch_once(&pred, ^(void) { |
| 235 | *p = 1; // expected-warning {{null}} |
| 236 | }); |
| 237 | } |
| 238 | |
| 239 | // Make sure code after call to dispatch once is reached. |
| 240 | void test_inline_dispatch_once_reachable() { |
| 241 | static dispatch_once_t pred; |
| 242 | __block int *p; |
| 243 | dispatch_once(&pred, ^(void) { |
| 244 | p = 0; |
| 245 | }); |
| 246 | |
| 247 | *p = 7; // expected-warning {{Dereference of null pointer (loaded from variable 'p')}} |
| 248 | } |
| 249 | |