| // REQUIRES: x86-registered-target |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=0 -fsanitize=array-bounds %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-0 |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=0 -fsanitize=array-bounds -x c++ %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-0,CXX,CXX-STRICT-0 |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=1 -fsanitize=array-bounds %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-1 |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=1 -fsanitize=array-bounds -x c++ %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-1,CXX |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=2 -fsanitize=array-bounds %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-2 |
| // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=2 -fsanitize=array-bounds -x c++ %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-2,CXX |
| // Before flexible array member was added to C99, many projects use a |
| // one-element array as the last member of a structure as an alternative. |
| // E.g. https://github.com/python/cpython/issues/84301 |
| // Suppress such errors with -fstrict-flex-arrays=0. |
| struct One { |
| int a[1]; |
| }; |
| struct Two { |
| int a[2]; |
| }; |
| struct Three { |
| int a[3]; |
| }; |
| |
| // CHECK-LABEL: define {{.*}} @{{.*}}test_one{{.*}}( |
| int test_one(struct One *p, int i) { |
| // CHECK-STRICT-0-NOT: @__ubsan |
| // CHECK-STRICT-1-NOT: @__ubsan |
| // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| // CHECK-LABEL: define {{.*}} @{{.*}}test_two{{.*}}( |
| int test_two(struct Two *p, int i) { |
| // CHECK-STRICT-0: call void @__ubsan_handle_out_of_bounds_abort( |
| // CHECK-STRICT-1: call void @__ubsan_handle_out_of_bounds_abort( |
| // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| // CHECK-LABEL: define {{.*}} @{{.*}}test_three{{.*}}( |
| int test_three(struct Three *p, int i) { |
| // CHECK-STRICT-0: call void @__ubsan_handle_out_of_bounds_abort( |
| // CHECK-STRICT-1: call void @__ubsan_handle_out_of_bounds_abort( |
| // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| #define FLEXIBLE 1 |
| struct Macro { |
| int a[FLEXIBLE]; |
| }; |
| |
| // CHECK-LABEL: define {{.*}} @{{.*}}test_macro{{.*}}( |
| int test_macro(struct Macro *p, int i) { |
| // CHECK-STRICT-0-NOT: @__ubsan |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| #if defined __cplusplus |
| |
| struct Base { |
| int b; |
| }; |
| struct NoStandardLayout : Base { |
| int a[1]; |
| }; |
| |
| // CXX-LABEL: define {{.*}} @{{.*}}test_nostandardlayout{{.*}}( |
| int test_nostandardlayout(NoStandardLayout *p, int i) { |
| // CXX-STRICT-0-NOT: @__ubsan |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| template<int N> struct Template { |
| int a[N]; |
| }; |
| |
| // CXX-LABEL: define {{.*}} @{{.*}}test_template{{.*}}( |
| int test_template(Template<1> *p, int i) { |
| // CXX-STRICT-0-NOT: @__ubsan |
| return p->a[i] + (p->a)[i]; |
| } |
| |
| #endif |