| 1 | // RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify -fblocks -fcxx-exceptions -fms-extensions %s -Wno-unreachable-code |
| 2 | // RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify -fblocks -fcxx-exceptions -fms-extensions -std=gnu++11 %s -Wno-unreachable-code |
| 3 | |
| 4 | namespace testInvalid { |
| 5 | Invalid inv; // expected-error {{unknown type name}} |
| 6 | // Make sure this doesn't assert. |
| 7 | void fn() |
| 8 | { |
| 9 | int c = 0; |
| 10 | if (inv) |
| 11 | Here: ; |
| 12 | goto Here; |
| 13 | } |
| 14 | } |
| 15 | |
| 16 | namespace test0 { |
| 17 | struct D { ~D(); }; |
| 18 | |
| 19 | int f(bool b) { |
| 20 | if (b) { |
| 21 | D d; |
| 22 | goto end; |
| 23 | } |
| 24 | |
| 25 | end: |
| 26 | return 1; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | namespace test1 { |
| 31 | struct C { C(); }; |
| 32 | |
| 33 | int f(bool b) { |
| 34 | if (b) |
| 35 | goto foo; // expected-error {{cannot jump}} |
| 36 | C c; // expected-note {{jump bypasses variable initialization}} |
| 37 | foo: |
| 38 | return 1; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | namespace test2 { |
| 43 | struct C { C(); }; |
| 44 | |
| 45 | int f(void **ip) { |
| 46 | static void *ips[] = { &&lbl1, &&lbl2 }; |
| 47 | |
| 48 | C c; |
| 49 | goto *ip; |
| 50 | lbl1: |
| 51 | return 0; |
| 52 | lbl2: |
| 53 | return 1; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | namespace test3 { |
| 58 | struct C { C(); }; |
| 59 | |
| 60 | int f(void **ip) { |
| 61 | static void *ips[] = { &&lbl1, &&lbl2 }; |
| 62 | |
| 63 | goto *ip; |
| 64 | lbl1: { |
| 65 | C c; |
| 66 | return 0; |
| 67 | } |
| 68 | lbl2: |
| 69 | return 1; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | namespace test4 { |
| 74 | struct C { C(); }; |
| 75 | struct D { ~D(); }; |
| 76 | |
| 77 | int f(void **ip) { |
| 78 | static void *ips[] = { &&lbl1, &&lbl2 }; |
| 79 | |
| 80 | C c0; |
| 81 | |
| 82 | goto *ip; // expected-error {{cannot jump}} |
| 83 | C c1; // expected-note {{jump bypasses variable initialization}} |
| 84 | lbl1: // expected-note {{possible target of indirect goto}} |
| 85 | return 0; |
| 86 | lbl2: |
| 87 | return 1; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | namespace test5 { |
| 92 | struct C { C(); }; |
| 93 | struct D { ~D(); }; |
| 94 | |
| 95 | int f(void **ip) { |
| 96 | static void *ips[] = { &&lbl1, &&lbl2 }; |
| 97 | C c0; |
| 98 | |
| 99 | goto *ip; |
| 100 | lbl1: // expected-note {{possible target of indirect goto}} |
| 101 | return 0; |
| 102 | lbl2: |
| 103 | if (ip[1]) { |
| 104 | D d; // expected-note {{jump exits scope of variable with non-trivial destructor}} |
| 105 | ip += 2; |
| 106 | goto *ip; // expected-error {{cannot jump}} |
| 107 | } |
| 108 | return 1; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | namespace test6 { |
| 113 | struct C { C(); }; |
| 114 | |
| 115 | unsigned f(unsigned s0, unsigned s1, void **ip) { |
| 116 | static void *ips[] = { &&lbl1, &&lbl2, &&lbl3, &&lbl4 }; |
| 117 | C c0; |
| 118 | |
| 119 | goto *ip; |
| 120 | lbl1: |
| 121 | s0++; |
| 122 | goto *++ip; |
| 123 | lbl2: |
| 124 | s0 -= s1; |
| 125 | goto *++ip; |
| 126 | lbl3: { |
| 127 | unsigned tmp = s0; |
| 128 | s0 = s1; |
| 129 | s1 = tmp; |
| 130 | goto *++ip; |
| 131 | } |
| 132 | lbl4: |
| 133 | return s0; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | // C++0x says it's okay to skip non-trivial initializers on static |
| 138 | // locals, and we implement that in '03 as well. |
| 139 | namespace test7 { |
| 140 | struct C { C(); }; |
| 141 | |
| 142 | void test() { |
| 143 | goto foo; |
| 144 | static C c; |
| 145 | foo: |
| 146 | return; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | // PR7789 |
| 151 | namespace test8 { |
| 152 | void test1(int c) { |
| 153 | switch (c) { |
| 154 | case 0: |
| 155 | int x = 56; // expected-note {{jump bypasses variable initialization}} |
| 156 | case 1: // expected-error {{cannot jump}} |
| 157 | x = 10; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | void test2() { |
| 162 | goto l2; // expected-error {{cannot jump}} |
| 163 | l1: int x = 5; // expected-note {{jump bypasses variable initialization}} |
| 164 | l2: x++; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | namespace test9 { |
| 169 | struct S { int i; }; |
| 170 | void test1() { |
| 171 | goto foo; |
| 172 | S s; |
| 173 | foo: |
| 174 | return; |
| 175 | } |
| 176 | unsigned test2(unsigned x, unsigned y) { |
| 177 | switch (x) { |
| 178 | case 2: |
| 179 | S s; |
| 180 | if (y > 42) return x + y; |
| 181 | default: |
| 182 | return x - 2; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | // http://llvm.org/PR10462 |
| 188 | namespace PR10462 { |
| 189 | enum MyEnum { |
| 190 | something_valid, |
| 191 | something_invalid |
| 192 | }; |
| 193 | |
| 194 | bool recurse() { |
| 195 | MyEnum K; |
| 196 | switch (K) { // do not warn that 'something_invalid' is not listed; |
| 197 | // 'what_am_i_thinking' might have been intended to be that case. |
| 198 | case something_valid: |
| 199 | case what_am_i_thinking: // expected-error {{use of undeclared identifier}} |
| 200 | int *X = 0; |
| 201 | if (recurse()) { |
| 202 | } |
| 203 | |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | namespace test10 { |
| 210 | int test() { |
| 211 | static void *ps[] = { &&a0 }; |
| 212 | goto *&&a0; // expected-error {{cannot jump}} |
| 213 | int a = 3; // expected-note {{jump bypasses variable initialization}} |
| 214 | a0: |
| 215 | return 0; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | // pr13812 |
| 220 | namespace test11 { |
| 221 | struct C { |
| 222 | C(int x); |
| 223 | ~C(); |
| 224 | }; |
| 225 | void f(void **ip) { |
| 226 | static void *ips[] = { &&l0 }; |
| 227 | l0: // expected-note {{possible target of indirect goto}} |
| 228 | C c0 = 42; // expected-note {{jump exits scope of variable with non-trivial destructor}} |
| 229 | goto *ip; // expected-error {{cannot jump}} |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | namespace test12 { |
| 234 | struct C { |
| 235 | C(int x); |
| 236 | ~C(); |
| 237 | }; |
| 238 | void f(void **ip) { |
| 239 | static void *ips[] = { &&l0 }; |
| 240 | const C c0 = 17; |
| 241 | l0: // expected-note {{possible target of indirect goto}} |
| 242 | const C &c1 = 42; // expected-note {{jump exits scope of lifetime-extended temporary with non-trivial destructor}} |
| 243 | const C &c2 = c0; |
| 244 | goto *ip; // expected-error {{cannot jump}} |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | namespace test13 { |
| 249 | struct C { |
| 250 | C(int x); |
| 251 | ~C(); |
| 252 | int i; |
| 253 | }; |
| 254 | void f(void **ip) { |
| 255 | static void *ips[] = { &&l0 }; |
| 256 | l0: // expected-note {{possible target of indirect goto}} |
| 257 | const int &c1 = C(1).i; // expected-note {{jump exits scope of lifetime-extended temporary with non-trivial destructor}} |
| 258 | goto *ip; // expected-error {{cannot jump}} |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | namespace test14 { |
| 263 | struct C { |
| 264 | C(int x); |
| 265 | ~C(); |
| 266 | operator int&() const; |
| 267 | }; |
| 268 | void f(void **ip) { |
| 269 | static void *ips[] = { &&l0 }; |
| 270 | l0: |
| 271 | // no warning since the C temporary is destructed before the goto. |
| 272 | const int &c1 = C(1); |
| 273 | goto *ip; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | // PR14225 |
| 278 | namespace test15 { |
| 279 | void f1() try { |
| 280 | goto x; // expected-error {{cannot jump}} |
| 281 | } catch(...) { // expected-note {{jump bypasses initialization of catch block}} |
| 282 | x: ; |
| 283 | } |
| 284 | void f2() try { // expected-note {{jump bypasses initialization of try block}} |
| 285 | x: ; |
| 286 | } catch(...) { |
| 287 | goto x; // expected-error {{cannot jump}} |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | namespace test16 { |
| 292 | struct S { int n; }; |
| 293 | int f() { |
| 294 | goto x; // expected-error {{cannot jump}} |
| 295 | const S &s = S(); // expected-note {{jump bypasses variable initialization}} |
| 296 | x: return s.n; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | #if __cplusplus >= 201103L |
| 301 | namespace test17 { |
| 302 | struct S { int get(); private: int n; }; |
| 303 | int f() { |
| 304 | goto x; // expected-error {{cannot jump}} |
| 305 | S s = {}; // expected-note {{jump bypasses variable initialization}} |
| 306 | x: return s.get(); |
| 307 | } |
| 308 | } |
| 309 | #endif |
| 310 | |
| 311 | namespace test18 { |
| 312 | struct A { ~A(); }; |
| 313 | struct B { const int &r; const A &a; }; |
| 314 | int f() { |
| 315 | void *p = &&x; |
| 316 | const A a = A(); |
| 317 | x: |
| 318 | B b = { 0, a }; // ok |
| 319 | goto *p; |
| 320 | } |
| 321 | int g() { |
| 322 | void *p = &&x; |
| 323 | x: // expected-note {{possible target of indirect goto}} |
| 324 | B b = { 0, A() }; // expected-note {{jump exits scope of lifetime-extended temporary with non-trivial destructor}} |
| 325 | goto *p; // expected-error {{cannot jump}} |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | #if __cplusplus >= 201103L |
| 330 | namespace std { |
| 331 | typedef decltype(sizeof(int)) size_t; |
| 332 | template<typename T> struct initializer_list { |
| 333 | const T *begin; |
| 334 | size_t size; |
| 335 | initializer_list(const T *, size_t); |
| 336 | }; |
| 337 | } |
| 338 | namespace test19 { |
| 339 | struct A { ~A(); }; |
| 340 | |
| 341 | int f() { |
| 342 | void *p = &&x; |
| 343 | A a; |
| 344 | x: // expected-note {{possible target of indirect goto}} |
| 345 | std::initializer_list<A> il = { a }; // expected-note {{jump exits scope of lifetime-extended temporary with non-trivial destructor}} |
| 346 | goto *p; // expected-error {{cannot jump}} |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | namespace test20 { |
| 351 | struct A { ~A(); }; |
| 352 | struct B { |
| 353 | const A &a; |
| 354 | }; |
| 355 | |
| 356 | int f() { |
| 357 | void *p = &&x; |
| 358 | A a; |
| 359 | x: |
| 360 | std::initializer_list<B> il = { |
| 361 | a, |
| 362 | a |
| 363 | }; |
| 364 | goto *p; |
| 365 | } |
| 366 | int g() { |
| 367 | void *p = &&x; |
| 368 | A a; |
| 369 | x: // expected-note {{possible target of indirect goto}} |
| 370 | std::initializer_list<B> il = { |
| 371 | a, |
| 372 | { A() } // expected-note {{jump exits scope of lifetime-extended temporary with non-trivial destructor}} |
| 373 | }; |
| 374 | goto *p; // expected-error {{cannot jump}} |
| 375 | } |
| 376 | } |
| 377 | #endif |
| 378 | |
| 379 | namespace test21 { |
| 380 | template<typename T> void f() { |
| 381 | goto x; // expected-error {{cannot jump}} |
| 382 | T t; // expected-note {{bypasses}} |
| 383 | x: return; |
| 384 | } |
| 385 | |
| 386 | template void f<int>(); |
| 387 | struct X { ~X(); }; |
| 388 | template void f<X>(); // expected-note {{instantiation of}} |
| 389 | } |
| 390 | |
| 391 | namespace PR18217 { |
| 392 | typedef int *X; |
| 393 | |
| 394 | template <typename T> |
| 395 | class MyCl { |
| 396 | T mem; |
| 397 | }; |
| 398 | |
| 399 | class Source { |
| 400 | MyCl<X> m; |
| 401 | public: |
| 402 | int getKind() const; |
| 403 | }; |
| 404 | |
| 405 | bool b; |
| 406 | template<typename TT> |
| 407 | static void foo(const Source &SF, MyCl<TT *> Source::*m) { |
| 408 | switch (SF.getKind()) { |
| 409 | case 1: return; |
| 410 | case 2: break; |
| 411 | case 3: |
| 412 | case 4: return; |
| 413 | }; |
| 414 | if (b) { |
| 415 | auto &y = const_cast<MyCl<TT *> &>(SF.*m); // expected-warning 0-1{{extension}} |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | int Source::getKind() const { |
| 420 | foo(*this, &Source::m); |
| 421 | return 0; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | namespace test_recovery { |
| 426 | // Test that jump scope checking recovers when there are unspecified errors |
| 427 | // in the function declaration or body. |
| 428 | |
| 429 | void test(nexist, int c) { // expected-error {{}} |
| 430 | nexist_fn(); // expected-error {{}} |
| 431 | goto nexist_label; // expected-error {{use of undeclared label}} |
| 432 | goto a0; // expected-error {{cannot jump}} |
| 433 | int a = 0; // expected-note {{jump bypasses variable initialization}} |
| 434 | a0:; |
| 435 | |
| 436 | switch (c) { |
| 437 | case $: // expected-error {{}} |
| 438 | case 0: |
| 439 | int x = 56; // expected-note {{jump bypasses variable initialization}} |
| 440 | case 1: // expected-error {{cannot jump}} |
| 441 | x = 10; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | namespace seh { |
| 447 | |
| 448 | // Jumping into SEH try blocks is not permitted. |
| 449 | |
| 450 | void jump_into_except() { |
| 451 | goto into_try_except_try; // expected-error {{cannot jump from this goto statement to its label}} |
| 452 | __try { // expected-note {{jump bypasses initialization of __try block}} |
| 453 | into_try_except_try: |
| 454 | ; |
| 455 | } __except(0) { |
| 456 | } |
| 457 | |
| 458 | goto into_try_except_except; // expected-error {{cannot jump from this goto statement to its label}} |
| 459 | __try { |
| 460 | } __except(0) { // expected-note {{jump bypasses initialization of __except block}} |
| 461 | into_try_except_except: |
| 462 | ; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | void jump_into_finally() { |
| 467 | goto into_try_except_try; // expected-error {{cannot jump from this goto statement to its label}} |
| 468 | __try { // expected-note {{jump bypasses initialization of __try block}} |
| 469 | into_try_except_try: |
| 470 | ; |
| 471 | } __finally { |
| 472 | } |
| 473 | |
| 474 | goto into_try_except_finally; // expected-error {{cannot jump from this goto statement to its label}} |
| 475 | __try { |
| 476 | } __finally { // expected-note {{jump bypasses initialization of __finally block}} |
| 477 | into_try_except_finally: |
| 478 | ; |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | // Jumping out of SEH try blocks ok in general. (Jumping out of a __finally |
| 483 | // has undefined behavior.) |
| 484 | |
| 485 | void jump_out_of_except() { |
| 486 | __try { |
| 487 | goto out_of_except_try; |
| 488 | } __except(0) { |
| 489 | } |
| 490 | out_of_except_try: |
| 491 | ; |
| 492 | |
| 493 | __try { |
| 494 | } __except(0) { |
| 495 | goto out_of_except_except; |
| 496 | } |
| 497 | out_of_except_except: |
| 498 | ; |
| 499 | } |
| 500 | |
| 501 | void jump_out_of_finally() { |
| 502 | __try { |
| 503 | goto out_of_finally_try; |
| 504 | } __finally { |
| 505 | } |
| 506 | out_of_finally_try: |
| 507 | ; |
| 508 | |
| 509 | __try { |
| 510 | } __finally { |
| 511 | goto out_of_finally_finally; // expected-warning {{jump out of __finally block has undefined behavior}} |
| 512 | } |
| 513 | |
| 514 | __try { |
| 515 | } __finally { |
| 516 | goto *&&out_of_finally_finally; // expected-warning {{jump out of __finally block has undefined behavior}} |
| 517 | } |
| 518 | out_of_finally_finally: |
| 519 | ; |
| 520 | } |
| 521 | |
| 522 | // Jumping between protected scope and handler is not permitted. |
| 523 | |
| 524 | void jump_try_except() { |
| 525 | __try { |
| 526 | goto from_try_to_except; // expected-error {{cannot jump from this goto statement to its label}} |
| 527 | } __except(0) { // expected-note {{jump bypasses initialization of __except block}} |
| 528 | from_try_to_except: |
| 529 | ; |
| 530 | } |
| 531 | |
| 532 | __try { // expected-note {{jump bypasses initialization of __try block}} |
| 533 | from_except_to_try: |
| 534 | ; |
| 535 | } __except(0) { |
| 536 | goto from_except_to_try; // expected-error {{cannot jump from this goto statement to its label}} |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | void jump_try_finally() { |
| 541 | __try { |
| 542 | goto from_try_to_finally; // expected-error {{cannot jump from this goto statement to its label}} |
| 543 | } __finally { // expected-note {{jump bypasses initialization of __finally block}} |
| 544 | from_try_to_finally: |
| 545 | ; |
| 546 | } |
| 547 | |
| 548 | __try { // expected-note {{jump bypasses initialization of __try block}} |
| 549 | from_finally_to_try: |
| 550 | ; |
| 551 | } __finally { |
| 552 | goto from_finally_to_try; // expected-error {{cannot jump from this goto statement to its label}} expected-warning {{jump out of __finally block has undefined behavior}} |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | void nested() { |
| 557 | // These are not permitted. |
| 558 | __try { |
| 559 | __try { |
| 560 | } __finally { |
| 561 | goto outer_except; // expected-error {{cannot jump from this goto statement to its label}} |
| 562 | } |
| 563 | } __except(0) { // expected-note {{jump bypasses initialization of __except bloc}} |
| 564 | outer_except: |
| 565 | ; |
| 566 | } |
| 567 | |
| 568 | __try { |
| 569 | __try{ |
| 570 | } __except(0) { |
| 571 | goto outer_finally; // expected-error {{cannot jump from this goto statement to its label}} |
| 572 | } |
| 573 | } __finally { // expected-note {{jump bypasses initialization of __finally bloc}} |
| 574 | outer_finally: |
| 575 | ; |
| 576 | } |
| 577 | |
| 578 | // These are permitted. |
| 579 | __try { |
| 580 | __try { |
| 581 | } __finally { |
| 582 | goto after_outer_except; // expected-warning {{jump out of __finally block has undefined behavior}} |
| 583 | } |
| 584 | } __except(0) { |
| 585 | } |
| 586 | after_outer_except: |
| 587 | ; |
| 588 | |
| 589 | __try { |
| 590 | __try{ |
| 591 | } __except(0) { |
| 592 | goto after_outer_finally; |
| 593 | } |
| 594 | } __finally { |
| 595 | } |
| 596 | after_outer_finally: |
| 597 | ; |
| 598 | } |
| 599 | |
| 600 | // This section is academic, as MSVC doesn't support indirect gotos. |
| 601 | |
| 602 | void indirect_jumps(void **ip) { |
| 603 | static void *ips[] = { &&l }; |
| 604 | |
| 605 | __try { // expected-note {{jump exits __try block}} |
| 606 | // FIXME: Should this be allowed? Jumping out of the guarded section of a |
| 607 | // __try/__except doesn't require unwinding. |
| 608 | goto *ip; // expected-error {{cannot jump from this indirect goto statement to one of its possible targets}} |
| 609 | } __except(0) { |
| 610 | } |
| 611 | |
| 612 | __try { |
| 613 | } __except(0) { // expected-note {{jump exits __except block}} |
| 614 | // FIXME: What about here? |
| 615 | goto *ip; // expected-error {{cannot jump from this indirect goto statement to one of its possible targets}} |
| 616 | } |
| 617 | |
| 618 | __try { // expected-note {{jump exits __try block}} |
| 619 | goto *ip; // expected-error {{cannot jump from this indirect goto statement to one of its possible targets}} |
| 620 | } __finally { |
| 621 | } |
| 622 | |
| 623 | __try { |
| 624 | } __finally { // expected-note {{jump exits __finally block}} |
| 625 | goto *ip; // expected-error {{cannot jump from this indirect goto statement to one of its possible targets}} |
| 626 | } |
| 627 | l: // expected-note 4 {{possible target of indirect goto statement}} |
| 628 | ; |
| 629 | } |
| 630 | |
| 631 | } // namespace seh |
| 632 | |