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// 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<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
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