1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s 2 // RUN: %clang_cc1 -fsanitize=alignment -fno-sanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE 3 // RUN: %clang_cc1 -fsanitize=alignment -fsanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER 4 // RUN: %clang_cc1 -fsanitize=alignment -fsanitize-trap=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE 5 6 // CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char **'\00" } 7 // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 35 }, {{.*}}* @[[CHAR]] } 8 9 void *caller(char **x, unsigned long offset) { 10 // CHECK: define{{.*}} i8* @{{.*}}(i8** noundef %[[X:.*]], i64 noundef %[[OFFSET:.*]]) 11 // CHECK-NEXT: entry: 12 // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 13 // CHECK-NEXT: %[[OFFSET_ADDR:.*]] = alloca i64, align 8 14 // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 15 // CHECK-NEXT: store i64 %[[OFFSET]], i64* %[[OFFSET_ADDR]], align 8 16 // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 17 // CHECK-NEXT: %[[BITCAST:.*]] = bitcast i8** %[[X_RELOADED]] to i8* 18 // CHECK-NEXT: %[[OFFSET_RELOADED:.*]] = load i64, i64* %[[OFFSET_ADDR]], align 8 19 // CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint i8* %[[BITCAST]] to i64 20 // CHECK-SANITIZE-NEXT: %[[OFFSETPTR:.*]] = sub i64 %[[PTRINT]], %[[OFFSET_RELOADED]] 21 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[OFFSETPTR]], 4294967295 22 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 23 // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8* %[[BITCAST]] to i64, !nosanitize 24 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize 25 // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: 26 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 4294967296, i64 %[[OFFSET_RELOADED]]){{.*}}, !nosanitize 27 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 4294967296, i64 %[[OFFSET_RELOADED]]){{.*}}, !nosanitize 28 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize 29 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize 30 // CHECK-SANITIZE: [[CONT]]: 31 // CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8* %[[BITCAST]], i64 4294967296, i64 %[[OFFSET_RELOADED]]) ] 32 // CHECK-NEXT: ret i8* %[[BITCAST]] 33 // CHECK-NEXT: } 34 #line 100 35 return __builtin_assume_aligned(x, 0x100000000, offset); 36 } 37