| // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE |
| // 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 |
| // 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 |
| // 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 |
| |
| // CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char **'\00" } |
| // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}* @[[CHAR]] } |
| |
| char **__attribute__((alloc_align(2))) |
| passthrough(char **x, unsigned long alignment) { |
| // CHECK: define i8** @[[PASSTHROUGH:.*]](i8** %[[X:.*]], i64 %[[ALIGNMENT:.*]]) |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 |
| // CHECK-NEXT: %[[ALIGNMENT_ADDR:.*]] = alloca i64, align 8 |
| // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 |
| // CHECK-NEXT: store i64 %[[ALIGNMENT]], i64* %[[ALIGNMENT_ADDR]], align 8 |
| // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 |
| // CHECK-NEXT: ret i8** %[[X_RELOADED]] |
| // CHECK-NEXT: } |
| return x; |
| } |
| |
| char **caller(char **x, unsigned long alignment) { |
| // CHECK: define i8** @{{.*}}(i8** %[[X:.*]], i64 %[[ALIGNMENT:.*]]) |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 |
| // CHECK-NEXT: %[[ALIGNMENT_ADDR:.*]] = alloca i64, align 8 |
| // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 |
| // CHECK-NEXT: store i64 %[[ALIGNMENT]], i64* %[[ALIGNMENT_ADDR]], align 8 |
| // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 |
| // CHECK-NEXT: %[[ALIGNMENT_RELOADED:.*]] = load i64, i64* %[[ALIGNMENT_ADDR]], align 8 |
| // CHECK-NEXT: %[[X_RETURNED:.*]] = call i8** @[[PASSTHROUGH]](i8** %[[X_RELOADED]], i64 %[[ALIGNMENT_RELOADED]]) |
| // CHECK-NEXT: %[[MASK:.*]] = sub i64 %[[ALIGNMENT_RELOADED]], 1 |
| // CHECK-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64 |
| // CHECK-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], %[[MASK]] |
| // CHECK-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 |
| // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64, !nosanitize |
| // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize |
| // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: |
| // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 %[[ALIGNMENT_RELOADED]], i64 0){{.*}}, !nosanitize |
| // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 %[[ALIGNMENT_RELOADED]], i64 0){{.*}}, !nosanitize |
| // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize |
| // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize |
| // CHECK-SANITIZE: [[CONT]]: |
| // CHECK-NEXT: call void @llvm.assume(i1 %[[MASKCOND]]) |
| // CHECK-NEXT: ret i8** %[[X_RETURNED]] |
| // CHECK-NEXT: } |
| #line 100 |
| return passthrough(x, alignment); |
| } |
