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catch-nullptr-and-nonzero-offset-when-nullptr-is-defined.c

catch-nullptr-and-nonzero-offset-when-nullptr-is-defined.c 8.7 KB
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  1. // RUN: %clang_cc1 -x c -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE
    2. 

  2. // RUN: %clang_cc1 -x c -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-C,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
    3. 

  3. // RUN: %clang_cc1 -x c -fsanitize=pointer-overflow -fsanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-C,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
    4. 

  4. // RUN: %clang_cc1 -x c -fsanitize=pointer-overflow -fsanitize-trap=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-C,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
    5. 

  5. 

  6. // RUN: %clang_cc1 -x c -fno-delete-null-pointer-checks -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE
    7. 

  7. // RUN: %clang_cc1 -x c -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
    8. 

  8. // RUN: %clang_cc1 -x c -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fsanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
    9. 

  9. // RUN: %clang_cc1 -x c -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fsanitize-trap=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
    10. 

  10. 

  11. // RUN: %clang_cc1 -x c++ -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE
    12. 

  12. // RUN: %clang_cc1 -x c++ -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-CPP,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
    13. 

  13. // RUN: %clang_cc1 -x c++ -fsanitize=pointer-overflow -fsanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-CPP,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
    14. 

  14. // RUN: %clang_cc1 -x c++ -fsanitize=pointer-overflow -fsanitize-trap=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLNOTOK,CHECK-SANITIZE-NULLNOTOK-CPP,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
    15. 

  15. 

  16. // RUN: %clang_cc1 -x c++ -fno-delete-null-pointer-checks -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE
    17. 

  17. // RUN: %clang_cc1 -x c++ -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
    18. 

  18. // RUN: %clang_cc1 -x c++ -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fsanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
    19. 

  19. // RUN: %clang_cc1 -x c++ -fno-delete-null-pointer-checks -fsanitize=pointer-overflow -fsanitize-trap=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_pointer_overflow" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-NULLOK,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
    20. 

  20. 

  21. // CHECK-SANITIZE-ANYRECOVER-DAG: @[[LINE_100:.*]] = {{.*}}, i32 100, i32 15 } }
    22. 

  22. 

  23. #ifdef __cplusplus
    24. 

  24. extern "C" {
    25. 

  25. #endif
    26. 

  26. 

  27. char *add_unsigned(char *base, unsigned long offset) {
    28. 

  28.   // CHECK:                           define i8* @add_unsigned(i8* %[[BASE:.*]], i64 %[[OFFSET:.*]])
    29. 

  29.   // CHECK-NEXT:                      [[ENTRY:.*]]:
    30. 

  30.   // CHECK-NEXT:                        %[[BASE_ADDR:.*]] = alloca i8*, align 8
    31. 

  31.   // CHECK-NEXT:                        %[[OFFSET_ADDR:.*]] = alloca i64, align 8
    32. 

  32.   // CHECK-NEXT:                        store i8* %[[BASE]], i8** %[[BASE_ADDR]], align 8
    33. 

  33.   // CHECK-NEXT:                        store i64 %[[OFFSET]], i64* %[[OFFSET_ADDR]], align 8
    34. 

  34.   // CHECK-NEXT:                        %[[BASE_RELOADED:.*]] = load i8*, i8** %[[BASE_ADDR]], align 8
    35. 

  35.   // CHECK-NEXT:                        %[[OFFSET_RELOADED:.*]] = load i64, i64* %[[OFFSET_ADDR]], align 8
    36. 

  36.   // CHECK-NEXT:                        %[[ADD_PTR:.*]] = getelementptr inbounds i8, i8* %[[BASE_RELOADED]], i64 %[[OFFSET_RELOADED]]
    37. 

  37.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_AGGREGATE:.*]] = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 1, i64 %[[OFFSET_RELOADED]]), !nosanitize
    38. 

  38.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_OVERFLOWED:.*]] = extractvalue { i64, i1 } %[[COMPUTED_OFFSET_AGGREGATE]], 1, !nosanitize
    39. 

  39.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET:.*]] = extractvalue { i64, i1 } %[[COMPUTED_OFFSET_AGGREGATE]], 0, !nosanitize
    40. 

  40.   // CHECK-SANITIZE-NEXT:               %[[BASE_RELOADED_INT:.*]] = ptrtoint i8* %[[BASE_RELOADED]] to i64, !nosanitize
    41. 

  41.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_GEP:.*]] = add i64 %[[BASE_RELOADED_INT]], %[[COMPUTED_OFFSET]], !nosanitize
    42. 

  42.   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[BASE_IS_NOT_NULLPTR:.*]] = icmp ne i8* %[[BASE_RELOADED]], null, !nosanitize
    43. 

  43.   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[COMPUTED_GEP_IS_NOT_NULL:.*]] = icmp ne i64 %[[COMPUTED_GEP]], 0, !nosanitize
    44. 

  44.   // CHECK-SANITIZE-NULLNOTOK-C-NEXT:   %[[BOTH_POINTERS_ARE_NULL_OR_BOTH_ARE_NONNULL:.*]] = and i1 %[[BASE_IS_NOT_NULLPTR]], %[[COMPUTED_GEP_IS_NOT_NULL]], !nosanitize
    45. 

  45.   // CHECK-SANITIZE-NULLNOTOK-CPP-NEXT: %[[BOTH_POINTERS_ARE_NULL_OR_BOTH_ARE_NONNULL:.*]] = icmp eq i1 %[[BASE_IS_NOT_NULLPTR]], %[[COMPUTED_GEP_IS_NOT_NULL]], !nosanitize
    46. 

  46.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_DID_NOT_OVERFLOW:.*]] = xor i1 %[[COMPUTED_OFFSET_OVERFLOWED]], true, !nosanitize
    47. 

  47.   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_GEP_IS_UGE_BASE:.*]] = icmp uge i64 %[[COMPUTED_GEP]], %[[BASE_RELOADED_INT]], !nosanitize
    48. 

  48.   // CHECK-SANITIZE-NEXT:               %[[GEP_DID_NOT_OVERFLOW:.*]] = and i1 %[[COMPUTED_GEP_IS_UGE_BASE]], %[[COMPUTED_OFFSET_DID_NOT_OVERFLOW]], !nosanitize
    49. 

  49.   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[GEP_IS_OKAY:.*]] = and i1 %[[BOTH_POINTERS_ARE_NULL_OR_BOTH_ARE_NONNULL]], %[[GEP_DID_NOT_OVERFLOW]], !nosanitize
    50. 

  50.   // CHECK-SANITIZE-NULLNOTOK-NEXT:     br i1 %[[GEP_IS_OKAY]],
    51. 

  51.   // CHECK-SANITIZE-NULLOK-NEXT:        br i1 %[[GEP_DID_NOT_OVERFLOW]],
    52. 

  52.   // CHECK-SANITIZE-SAME:                                                label %[[CONT:.*]], label %[[HANDLER_POINTER_OVERFLOW:[^,]+]],{{.*}} !nosanitize
    53. 

  53.   // CHECK-SANITIZE:                  [[HANDLER_POINTER_OVERFLOW]]:
    54. 

  54.   // CHECK-SANITIZE-NORECOVER-NEXT:     call void @__ubsan_handle_pointer_overflow_abort(i8* bitcast ({ {{{.*}}} }* @[[LINE_100]] to i8*), i64 %[[BASE_RELOADED_INT]], i64 %[[COMPUTED_GEP]])
    55. 

  55.   // CHECK-SANITIZE-RECOVER-NEXT:       call void @__ubsan_handle_pointer_overflow(i8* bitcast ({ {{{.*}}} }* @[[LINE_100]] to i8*), i64 %[[BASE_RELOADED_INT]], i64 %[[COMPUTED_GEP]])
    56. 

  56.   // CHECK-SANITIZE-TRAP-NEXT:          call void @llvm.trap(){{.*}}, !nosanitize
    57. 

  57.   // CHECK-SANITIZE-UNREACHABLE-NEXT:   unreachable, !nosanitize
    58. 

  58.   // CHECK-SANITIZE:                  [[CONT]]:
    59. 

  59.   // CHECK-NEXT:                        ret i8* %[[ADD_PTR]]
    60. 

  60. #line 100
    61. 

  61.   return base + offset;
    62. 

  62. }
    63. 

  63. 

  64. #ifdef __cplusplus
    65. 

  65. }
    66. 

  66. #endif
    67.