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diff clang/test/CodeGenObjC/ubsan-nullability.m @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
parents
children 2e18cbf3894f
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/CodeGenObjC/ubsan-nullability.m	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,225 @@
+// REQUIRES: asserts
+// RUN: %clang_cc1 -x objective-c -emit-llvm -triple x86_64-apple-macosx10.10.0 -fblocks -fobjc-arc -fsanitize=nullability-arg,nullability-assign,nullability-return -w %s -o - | FileCheck %s
+// RUN: %clang_cc1 -x objective-c++ -emit-llvm -triple x86_64-apple-macosx10.10.0 -fblocks -fobjc-arc -fsanitize=nullability-arg,nullability-assign,nullability-return -w %s -o - | FileCheck %s
+
+// CHECK: [[NONNULL_RV_LOC1:@.*]] = private unnamed_addr global {{.*}} i32 100, i32 6
+// CHECK: [[NONNULL_ARG_LOC:@.*]] = private unnamed_addr global {{.*}} i32 204, i32 15 {{.*}} i32 190, i32 23
+// CHECK: [[NONNULL_ASSIGN1_LOC:@.*]] = private unnamed_addr global {{.*}} i32 305, i32 9
+// CHECK: [[NONNULL_ASSIGN2_LOC:@.*]] = private unnamed_addr global {{.*}} i32 405, i32 10
+// CHECK: [[NONNULL_ASSIGN3_LOC:@.*]] = private unnamed_addr global {{.*}} i32 506, i32 10
+// CHECK: [[NONNULL_INIT1_LOC:@.*]] = private unnamed_addr global {{.*}} i32 604, i32 25
+// CHECK: [[NONNULL_INIT2_LOC1:@.*]] = private unnamed_addr global {{.*}} i32 707, i32 26
+// CHECK: [[NONNULL_INIT2_LOC2:@.*]] = private unnamed_addr global {{.*}} i32 707, i32 29
+// CHECK: [[NONNULL_RV_LOC2:@.*]] = private unnamed_addr global {{.*}} i32 800, i32 6
+
+#define NULL ((void *)0)
+#define INULL ((int *)NULL)
+#define INNULL ((int *_Nonnull)NULL)
+
+// CHECK-LABEL: define i32* @{{.*}}nonnull_retval1
+#line 100
+int *_Nonnull nonnull_retval1(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_return{{.*}}[[NONNULL_RV_LOC1]]
+  return p;
+  // CHECK: ret i32*
+}
+
+#line 190
+void nonnull_arg(int *_Nonnull p) {}
+
+// CHECK-LABEL: define void @{{.*}}call_func_with_nonnull_arg
+#line 200
+void call_func_with_nonnull_arg(int *_Nonnull p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_arg{{.*}}[[NONNULL_ARG_LOC]]
+  nonnull_arg(p);
+}
+
+// CHECK-LABEL: define void @{{.*}}nonnull_assign1
+#line 300
+void nonnull_assign1(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_ASSIGN1_LOC]]
+  int *_Nonnull local;
+  local = p;
+}
+
+// CHECK-LABEL: define void @{{.*}}nonnull_assign2
+#line 400
+void nonnull_assign2(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* %{{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_ASSIGN2_LOC]]
+  int *_Nonnull arr[1];
+  arr[0] = p;
+}
+
+struct S1 {
+  int *_Nonnull mptr;
+};
+
+// CHECK-LABEL: define void @{{.*}}nonnull_assign3
+#line 500
+void nonnull_assign3(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* %{{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_ASSIGN3_LOC]]
+  // CHECK-NOT: call void @__ubsan_handle_type_mismatch
+  struct S1 s;
+  s.mptr = p;
+}
+
+// CHECK-LABEL: define void @{{.*}}nonnull_init1
+#line 600
+void nonnull_init1(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* %{{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_INIT1_LOC]]
+  int *_Nonnull local = p;
+}
+
+// CHECK-LABEL: define void @{{.*}}nonnull_init2
+#line 700
+void nonnull_init2(int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* %{{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_INIT2_LOC1]]
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* %{{.*}}, null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_type_mismatch{{.*}}[[NONNULL_INIT2_LOC2]]
+  int *_Nonnull arr[] = {p, p};
+}
+
+// CHECK-LABEL: define i32* @{{.*}}nonnull_retval2
+#line 800
+int *_Nonnull nonnull_retval2(int *_Nonnull arg1,  //< Test this.
+                              int *_Nonnull arg2,  //< Test this.
+                              int *_Nullable arg3, //< Don't test the rest.
+                              int *arg4,
+                              int arg5, ...) {
+  // CHECK: [[ARG1CMP:%.*]] = icmp ne i32* %arg1, null, !nosanitize
+  // CHECK-NEXT: [[DO_RV_CHECK_1:%.*]] = and i1 true, [[ARG1CMP]], !nosanitize
+  // CHECK: [[ARG2CMP:%.*]] = icmp ne i32* %arg2, null, !nosanitize
+  // CHECK-NEXT: [[DO_RV_CHECK_2:%.*]] = and i1 [[DO_RV_CHECK_1]], [[ARG2CMP]]
+  // CHECK: [[SLOC_PTR:%.*]] = load i8*, i8** %return.sloc.ptr
+  // CHECK-NEXT: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC_PTR]], null
+  // CHECK-NEXT: [[DO_RV_CHECK_3:%.*]] = and i1 [[SLOC_NONNULL]], [[DO_RV_CHECK_2]]
+  // CHECK: br i1 [[DO_RV_CHECK_3]], label %[[NULL:.*]], label %[[NONULL:.*]], !nosanitize
+  // CHECK: [[NULL]]:
+  // CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_return{{.*}}[[NONNULL_RV_LOC2]]
+  return arg1;
+  // CHECK: [[NONULL]]:
+  // CHECK-NEXT: ret i32*
+}
+
+@interface A
++(int *_Nonnull) objc_clsmethod: (int *_Nonnull) arg1;
+-(int *_Nonnull) objc_method: (int *_Nonnull) arg1;
+@end
+
+@implementation A
+
+// CHECK-LABEL: define internal i32* @"\01+[A objc_clsmethod:]"
++(int *_Nonnull) objc_clsmethod: (int *_Nonnull) arg1 {
+  // CHECK: [[ARG1CMP:%.*]] = icmp ne i32* %arg1, null, !nosanitize
+  // CHECK-NEXT: [[DO_RV_CHECK:%.*]] = and i1 true, [[ARG1CMP]]
+  // CHECK: [[SLOC_PTR:%.*]] = load i8*, i8** %return.sloc.ptr
+  // CHECK-NEXT: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC_PTR]], null
+  // CHECK-NEXT: [[DO_RV_CHECK_2:%.*]] = and i1 [[SLOC_NONNULL]], [[DO_RV_CHECK]]
+  // CHECK: br i1 [[DO_RV_CHECK_2]], label %[[NULL:.*]], label %[[NONULL:.*]], !nosanitize
+  // CHECK: [[NULL]]:
+  // CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_return{{.*}}
+  return arg1;
+  // CHECK: [[NONULL]]:
+  // CHECK-NEXT: ret i32*
+}
+
+// CHECK-LABEL: define internal i32* @"\01-[A objc_method:]"
+-(int *_Nonnull) objc_method: (int *_Nonnull) arg1 {
+  // CHECK: [[ARG1CMP:%.*]] = icmp ne i32* %arg1, null, !nosanitize
+  // CHECK-NEXT: [[DO_RV_CHECK:%.*]] = and i1 true, [[ARG1CMP]]
+  // CHECK: [[SLOC_PTR:%.*]] = load i8*, i8** %return.sloc.ptr
+  // CHECK-NEXT: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC_PTR]], null
+  // CHECK-NEXT: [[DO_RV_CHECK_2:%.*]] = and i1 [[SLOC_NONNULL]], [[DO_RV_CHECK]]
+  // CHECK: br i1 [[DO_RV_CHECK_2]], label %[[NULL:.*]], label %[[NONULL:.*]], !nosanitize
+  // CHECK: [[NULL]]:
+  // CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
+  // CHECK: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_return{{.*}}
+  return arg1;
+  // CHECK: [[NONULL]]:
+  // CHECK-NEXT: ret i32*
+}
+@end
+
+// CHECK-LABEL: define void @{{.*}}call_A
+void call_A(A *a, int *p) {
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* [[P1:%.*]], null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_arg{{.*}} !nosanitize
+  // CHECK: call i32* {{.*}} @objc_msgSend to i32* {{.*}}({{.*}}, i32* [[P1]])
+  [a objc_method: p];
+
+  // CHECK: [[ICMP:%.*]] = icmp ne i32* [[P2:%.*]], null, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
+  // CHECK: call void @__ubsan_handle_nullability_arg{{.*}} !nosanitize
+  // CHECK: call i32* {{.*}} @objc_msgSend to i32* {{.*}}({{.*}}, i32* [[P2]])
+  [A objc_clsmethod: p];
+}
+
+void dont_crash(int *_Nonnull p, ...) {}
+
+@protocol NSObject
+- (id)init;
+@end
+@interface NSObject <NSObject> {}
+@end
+
+#pragma clang assume_nonnull begin
+
+/// Create a "NSObject * _Nonnull" instance.
+NSObject *get_nonnull_error() {
+  // Use nil for convenience. The actual object doesn't matter.
+  return (NSObject *)NULL;
+}
+
+NSObject *_Nullable no_null_return_value_diagnostic(int flag) {
+// CHECK-LABEL: define internal {{.*}}no_null_return_value_diagnostic{{i?}}_block_invoke
+// CHECK-NOT: @__ubsan_handle_nullability_return
+  NSObject *_Nullable (^foo)() = ^() {
+    if (flag) {
+      // Clang should not infer a nonnull return value for this block when this
+      // call is present.
+      return get_nonnull_error();
+    } else {
+      return (NSObject *)NULL;
+    }
+  };
+  return foo();
+}
+
+#pragma clang assume_nonnull end
+
+int main() {
+  nonnull_retval1(INULL);
+  nonnull_retval2(INNULL, INNULL, INULL, (int *_Nullable)NULL, 0, 0, 0, 0);
+  call_func_with_nonnull_arg(INNULL);
+  nonnull_assign1(INULL);
+  nonnull_assign2(INULL);
+  nonnull_assign3(INULL);
+  nonnull_init1(INULL);
+  nonnull_init2(INULL);
+  call_A((A *)NULL, INULL);
+  dont_crash(INNULL, NULL);
+  no_null_return_value_diagnostic(0);
+  no_null_return_value_diagnostic(1);
+  return 0;
+}