forked from OSchip/llvm-project
221 lines
8.8 KiB
Objective-C
221 lines
8.8 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -w -emit-llvm -o - %s -fsanitize=pointer-overflow | FileCheck %s
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// CHECK-LABEL: define void @unary_arith
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void unary_arith(char *p) {
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// CHECK: [[BASE:%.*]] = ptrtoint i8* {{.*}} to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 [[BASE]], 1, !nosanitize
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// CHECK-NEXT: [[POSVALID:%.*]] = icmp uge i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK-NEXT: br i1 [[POSVALID]]{{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}, i64 [[BASE]], i64 [[COMPGEP]]){{.*}}, !nosanitize
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++p;
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// CHECK: ptrtoint i8* {{.*}} to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 {{.*}}, -1, !nosanitize
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// CHECK: [[NEGVALID:%.*]] = icmp ule i64 [[COMPGEP]], {{.*}}, !nosanitize
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// CHECK-NOT: select
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// CHECK: br i1 [[NEGVALID]]{{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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--p;
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// CHECK: icmp uge i64
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p++;
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// CHECK: icmp ule i64
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p--;
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}
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// CHECK-LABEL: define void @binary_arith
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void binary_arith(char *p, int i) {
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// CHECK: [[SMUL:%.*]] = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 1, i64 %{{.*}}), !nosanitize
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// CHECK-NEXT: [[SMULOFLOW:%.*]] = extractvalue { i64, i1 } [[SMUL]], 1, !nosanitize
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// CHECK-NEXT: [[SMULVAL:%.*]] = extractvalue { i64, i1 } [[SMUL]], 0, !nosanitize
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// CHECK-NEXT: [[BASE:%.*]] = ptrtoint i8* {{.*}} to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 [[BASE]], [[SMULVAL]], !nosanitize
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// CHECK-NEXT: [[OFFSETVALID:%.*]] = xor i1 [[SMULOFLOW]], true, !nosanitize
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// CHECK-NEXT: [[POSVALID:%.*]] = icmp uge i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK-NEXT: [[POSOFFSET:%.*]] = icmp sge i64 [[SMULVAL]], 0, !nosanitize
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// CHECK-NEXT: [[NEGVALID:%.*]] = icmp ult i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK-NEXT: [[DIFFVALID:%.*]] = select i1 [[POSOFFSET]], i1 [[POSVALID]], i1 [[NEGVALID]], !nosanitize
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// CHECK: [[VALID:%.*]] = and i1 [[DIFFVALID]], [[OFFSETVALID]], !nosanitize
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// CHECK-NEXT: br i1 [[VALID]]{{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}, i64 [[BASE]], i64 [[COMPGEP]]){{.*}}, !nosanitize
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p + i;
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// CHECK: [[OFFSET:%.*]] = sub i64 0, {{.*}}
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// CHECK-NEXT: getelementptr inbounds {{.*}} [[OFFSET]]
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// CHECK: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p - i;
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}
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// CHECK-LABEL: define void @binary_arith_unsigned
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void binary_arith_unsigned(char *p, unsigned i) {
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// CHECK: [[SMUL:%.*]] = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 1, i64 %{{.*}}), !nosanitize
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// CHECK-NEXT: [[SMULOFLOW:%.*]] = extractvalue { i64, i1 } [[SMUL]], 1, !nosanitize
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// CHECK-NEXT: [[SMULVAL:%.*]] = extractvalue { i64, i1 } [[SMUL]], 0, !nosanitize
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// CHECK-NEXT: [[BASE:%.*]] = ptrtoint i8* {{.*}} to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 [[BASE]], [[SMULVAL]], !nosanitize
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// CHECK-NEXT: [[OFFSETVALID:%.*]] = xor i1 [[SMULOFLOW]], true, !nosanitize
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// CHECK-NEXT: [[POSVALID:%.*]] = icmp uge i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK: [[VALID:%.*]] = and i1 [[POSVALID]], [[OFFSETVALID]], !nosanitize
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// CHECK-NEXT: br i1 [[VALID]]{{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}, i64 [[BASE]], i64 [[COMPGEP]]){{.*}}, !nosanitize
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p + i;
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// CHECK: [[OFFSET:%.*]] = sub i64 0, {{.*}}
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// CHECK-NEXT: getelementptr inbounds {{.*}} [[OFFSET]]
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// CHECK: icmp ule i64
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p - i;
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}
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// CHECK-LABEL: define void @fixed_len_array
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void fixed_len_array(int k) {
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// CHECK: getelementptr inbounds [10 x [10 x i32]], [10 x [10 x i32]]* [[ARR:%.*]], i64 0, i64 [[IDXPROM:%.*]]
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// CHECK-NEXT: [[SMUL:%.*]] = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 40, i64 [[IDXPROM]]), !nosanitize
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// CHECK-NEXT: [[SMULOFLOW:%.*]] = extractvalue { i64, i1 } [[SMUL]], 1, !nosanitize
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// CHECK-NEXT: [[SMULVAL:%.*]] = extractvalue { i64, i1 } [[SMUL]], 0, !nosanitize
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// CHECK-NEXT: [[BASE:%.*]] = ptrtoint [10 x [10 x i32]]* [[ARR]] to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 [[BASE]], [[SMULVAL]], !nosanitize
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// CHECK-NEXT: [[OFFSETVALID:%.*]] = xor i1 [[SMULOFLOW]], true, !nosanitize
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// CHECK-NEXT: [[POSVALID:%.*]] = icmp uge i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK-NEXT: [[POSOFFSET:%.*]] = icmp sge i64 [[SMULVAL]], 0, !nosanitize
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// CHECK-NEXT: [[NEGVALID:%.*]] = icmp ult i64 [[COMPGEP]], [[BASE]], !nosanitize
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// CHECK-NEXT: [[DIFFVALID:%.*]] = select i1 [[POSOFFSET]], i1 [[POSVALID]], i1 [[NEGVALID]], !nosanitize
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// CHECK: [[VALID:%.*]] = and i1 [[DIFFVALID]], [[OFFSETVALID]], !nosanitize
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// CHECK-NEXT: br i1 [[VALID]]{{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}, i64 [[BASE]], i64 [[COMPGEP]]){{.*}}, !nosanitize
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// CHECK: getelementptr inbounds [10 x i32], [10 x i32]* {{.*}}, i64 0, i64 [[IDXPROM1:%.*]]
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// CHECK-NEXT: @llvm.smul.with.overflow.i64(i64 4, i64 [[IDXPROM1]]), !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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int arr[10][10];
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arr[k][k];
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}
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// CHECK-LABEL: define void @variable_len_array
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void variable_len_array(int n, int k) {
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[IDXPROM:%.*]]
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// CHECK-NEXT: @llvm.smul.with.overflow.i64(i64 4, i64 [[IDXPROM]]), !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[IDXPROM1:%.*]]
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// CHECK-NEXT: @llvm.smul.with.overflow.i64(i64 4, i64 [[IDXPROM1]]), !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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int arr[n][n];
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arr[k][k];
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}
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// CHECK-LABEL: define void @pointer_array
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void pointer_array(int **arr, int k) {
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// CHECK: @llvm.smul.with.overflow.i64(i64 8, i64 {{.*}}), !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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// CHECK: @llvm.smul.with.overflow.i64(i64 4, i64 {{.*}}), !nosanitize
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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arr[k][k];
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}
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// CHECK-LABEL: define void @pointer_array_unsigned_indices
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void pointer_array_unsigned_indices(int **arr, unsigned k) {
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// CHECK: icmp uge
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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// CHECK: icmp uge
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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arr[k][k];
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}
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// CHECK-LABEL: define void @pointer_array_mixed_indices
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void pointer_array_mixed_indices(int **arr, int i, unsigned j) {
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// CHECK: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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arr[i][j];
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}
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struct S1 {
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int pad1;
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union {
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char leaf;
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struct S1 *link;
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} u;
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struct S1 *arr;
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};
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// TODO: Currently, structure GEPs are not checked, so there are several
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// potentially unsafe GEPs here which we don't instrument.
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//
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// CHECK-LABEL: define void @struct_index
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void struct_index(struct S1 *p) {
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// CHECK: getelementptr inbounds %struct.S1, %struct.S1* [[P:%.*]], i64 10
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// CHECK-NEXT: [[BASE:%.*]] = ptrtoint %struct.S1* [[P]] to i64, !nosanitize
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// CHECK-NEXT: [[COMPGEP:%.*]] = add i64 [[BASE]], 240, !nosanitize
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// CHECK: select
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// CHECK: @__ubsan_handle_pointer_overflow{{.*}} i64 [[BASE]], i64 [[COMPGEP]]) {{.*}}, !nosanitize
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// CHECK-NOT: @__ubsan_handle_pointer_overflow
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p->arr[10].u.link->u.leaf;
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}
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typedef void (*funcptr_t)(void);
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// CHECK-LABEL: define void @function_pointer_arith
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void function_pointer_arith(funcptr_t *p, int k) {
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// CHECK: add i64 {{.*}}, 8, !nosanitize
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// CHECK-NOT: select
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// CHECK: @__ubsan_handle_pointer_overflow{{.*}}
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++p;
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// CHECK: @llvm.smul.with.overflow.i64(i64 8, i64 {{.*}}), !nosanitize
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// CHECK: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p + k;
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}
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// CHECK-LABEL: define void @variable_len_array_arith
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void variable_len_array_arith(int n, int k) {
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int vla[n];
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int (*p)[n] = &vla;
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[INC:%.*]]
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// CHECK: @llvm.smul.with.overflow.i64(i64 4, i64 [[INC]]), !nosanitize
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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++p;
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[IDXPROM:%.*]]
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// CHECK: @llvm.smul.with.overflow.i64(i64 4, i64 [[IDXPROM]]), !nosanitize
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// CHECK: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p + k;
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}
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// CHECK-LABEL: define void @objc_id
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void objc_id(id *p) {
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// CHECK: add i64 {{.*}}, 8, !nosanitize
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// CHECK-NOT: select
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// CHECK: @__ubsan_handle_pointer_overflow{{.*}}
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p++;
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}
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// CHECK-LABEL: define void @dont_emit_checks_for_no_op_GEPs
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// CHECK-NOT: __ubsan_handle_pointer_overflow
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void dont_emit_checks_for_no_op_GEPs(char *p) {
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&p[0];
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int arr[10][10];
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&arr[0][0];
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}
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