clang/test/CodeGen/catch-nullptr-and-nonzero-offset-when-nullptr-is-defined.c

   1 // RUN: %clang_cc1 -x c -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
   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 // 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 // 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
   6 // RUN: %clang_cc1 -x c -fno-delete-null-pointer-checks -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
   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 // 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 // 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
  11 // RUN: %clang_cc1 -x c++ -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
  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 // 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 // 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
  16 // RUN: %clang_cc1 -x c++ -fno-delete-null-pointer-checks -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
  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 // 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 // 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
  21 // CHECK-SANITIZE-ANYRECOVER-DAG: @[[LINE_100:.*]] = {{.*}}, i32 100, i32 15 } }
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27 char *add_unsigned(char *base, unsigned long offset) {
  28   // CHECK:                           define{{.*}} ptr @add_unsigned(ptr noundef %[[BASE:.*]], i64 noundef %[[OFFSET:.*]])
  29   // CHECK-NEXT:                      [[ENTRY:.*]]:
  30   // CHECK-NEXT:                        %[[BASE_ADDR:.*]] = alloca ptr, align 8
  31   // CHECK-NEXT:                        %[[OFFSET_ADDR:.*]] = alloca i64, align 8
  32   // CHECK-NEXT:                        store ptr %[[BASE]], ptr %[[BASE_ADDR]], align 8
  33   // CHECK-NEXT:                        store i64 %[[OFFSET]], ptr %[[OFFSET_ADDR]], align 8
  34   // CHECK-NEXT:                        %[[BASE_RELOADED:.*]] = load ptr, ptr %[[BASE_ADDR]], align 8
  35   // CHECK-NEXT:                        %[[OFFSET_RELOADED:.*]] = load i64, ptr %[[OFFSET_ADDR]], align 8
  36   // CHECK-NEXT:                        %[[ADD_PTR:.*]] = getelementptr inbounds nuw i8, ptr %[[BASE_RELOADED]], i64 %[[OFFSET_RELOADED]]
  37   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_AGGREGATE:.*]] = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 1, i64 %[[OFFSET_RELOADED]]), !nosanitize
  38   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_OVERFLOWED:.*]] = extractvalue { i64, i1 } %[[COMPUTED_OFFSET_AGGREGATE]], 1, !nosanitize
  39   // CHECK-SANITIZE-NEXT:               %[[OR_OV:.+]] = or i1 %[[COMPUTED_OFFSET_OVERFLOWED]], false, !nosanitize
  40   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET:.*]] = extractvalue { i64, i1 } %[[COMPUTED_OFFSET_AGGREGATE]], 0, !nosanitize
  41   // CHECK-SANITIZE-NEXT:               %[[BASE_RELOADED_INT:.*]] = ptrtoint ptr %[[BASE_RELOADED]] to i64, !nosanitize
  42   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_GEP:.*]] = add i64 %[[BASE_RELOADED_INT]], %[[COMPUTED_OFFSET]], !nosanitize
  43   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[BASE_IS_NOT_NULLPTR:.*]] = icmp ne ptr %[[BASE_RELOADED]], null, !nosanitize
  44   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[COMPUTED_GEP_IS_NOT_NULL:.*]] = icmp ne i64 %[[COMPUTED_GEP]], 0, !nosanitize
  45   // 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
  46   // 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
  47   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_OFFSET_DID_NOT_OVERFLOW:.*]] = xor i1 %[[OR_OV]], true, !nosanitize
  48   // CHECK-SANITIZE-NEXT:               %[[COMPUTED_GEP_IS_UGE_BASE:.*]] = icmp uge i64 %[[COMPUTED_GEP]], %[[BASE_RELOADED_INT]], !nosanitize
  49   // CHECK-SANITIZE-NEXT:               %[[GEP_DID_NOT_OVERFLOW:.*]] = and i1 %[[COMPUTED_GEP_IS_UGE_BASE]], %[[COMPUTED_OFFSET_DID_NOT_OVERFLOW]], !nosanitize
  50   // CHECK-SANITIZE-NULLNOTOK-NEXT:     %[[GEP_IS_OKAY:.*]] = and i1 %[[BOTH_POINTERS_ARE_NULL_OR_BOTH_ARE_NONNULL]], %[[GEP_DID_NOT_OVERFLOW]], !nosanitize
  51   // CHECK-SANITIZE-NULLNOTOK-NEXT:     br i1 %[[GEP_IS_OKAY]],
  52   // CHECK-SANITIZE-NULLOK-NEXT:        br i1 %[[GEP_DID_NOT_OVERFLOW]],
  53   // CHECK-SANITIZE-SAME:                                                label %[[CONT:.*]], label %[[HANDLER_POINTER_OVERFLOW:[^,]+]],{{.*}} !nosanitize
  54   // CHECK-SANITIZE:                  [[HANDLER_POINTER_OVERFLOW]]:
  55   // CHECK-SANITIZE-NORECOVER-NEXT:     call void @__ubsan_handle_pointer_overflow_abort(ptr @[[LINE_100]], i64 %[[BASE_RELOADED_INT]], i64 %[[COMPUTED_GEP]])
  56   // CHECK-SANITIZE-RECOVER-NEXT:       call void @__ubsan_handle_pointer_overflow(ptr @[[LINE_100]], i64 %[[BASE_RELOADED_INT]], i64 %[[COMPUTED_GEP]])
  57   // CHECK-SANITIZE-TRAP-NEXT:          call void @llvm.ubsantrap(i8 19){{.*}}, !nosanitize
  58   // CHECK-SANITIZE-UNREACHABLE-NEXT:   unreachable, !nosanitize
  59   // CHECK-SANITIZE:                  [[CONT]]:
  60   // CHECK-NEXT:                        ret ptr %[[ADD_PTR]]
  61 #line 100
  62   return base + offset;
  63 }
  64
  65 #ifdef __cplusplus
  66 }
  67 #endif