// 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 // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=3 -fsanitize=array-bounds %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-3 // RUN: %clang_cc1 -emit-llvm -triple x86_64 -fstrict-flex-arrays=3 -fsanitize=array-bounds -x c++ %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-STRICT-3,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 Incomplete { int ignored; int a[]; }; struct Zero { int ignored; int a[0]; }; struct One { int ignored; int a[1]; }; struct Two { int ignored; int a[2]; }; struct Three { int ignored; int a[3]; }; // CHECK-LABEL: define {{.*}} @{{.*}}test_incomplete{{.*}}( int test_incomplete(struct Incomplete *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1-NOT: @__ubsan // CHECK-STRICT-2-NOT: @__ubsan // CHECK-STRICT-3-NOT: @__ubsan return p->a[i] + (p->a)[i]; } // CHECK-LABEL: define {{.*}} @{{.*}}test_zero{{.*}}( int test_zero(struct Zero *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1-NOT: @__ubsan // CHECK-STRICT-2-NOT: @__ubsan // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( return p->a[i] + (p->a)[i]; } // 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( // CHECK-STRICT-3: 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-NOT: @__ubsan // 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-NOT: @__ubsan // CHECK-STRICT-1: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( return p->a[i] + (p->a)[i]; } union uZero { int a[0]; }; union uOne { int a[1]; }; union uTwo { int a[2]; }; union uThree { int a[3]; }; // CHECK-LABEL: define {{.*}} @{{.*}}test_uzero{{.*}}( int test_uzero(union uZero *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1-NOT: @__ubsan // CHECK-STRICT-2-NOT: @__ubsan // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( return p->a[i] + (p->a)[i]; } // CHECK-LABEL: define {{.*}} @{{.*}}test_uone{{.*}}( int test_uone(union uOne *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1-NOT: @__ubsan // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( return p->a[i] + (p->a)[i]; } // CHECK-LABEL: define {{.*}} @{{.*}}test_utwo{{.*}}( int test_utwo(union uTwo *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( return p->a[i] + (p->a)[i]; } // CHECK-LABEL: define {{.*}} @{{.*}}test_uthree{{.*}}( int test_uthree(union uThree *p, int i) { // CHECK-STRICT-0-NOT: @__ubsan // CHECK-STRICT-1: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-3: 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 // CHECK-STRICT-1-NOT: @__ubsan // CHECK-STRICT-2: call void @__ubsan_handle_out_of_bounds_abort( // CHECK-STRICT-3: call void @__ubsan_handle_out_of_bounds_abort( 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 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