| Roman Lebedev | bd1c087 | 2019-01-15 09:44:25 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE |
| 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 10 }, {{.*}}* @[[CHAR]] } |
| 8 | |
| 9 | char **__attribute__((alloc_align(2))) |
| 10 | passthrough(char **x, unsigned long alignment) { |
| 11 | // CHECK: define i8** @[[PASSTHROUGH:.*]](i8** %[[X:.*]], i64 %[[ALIGNMENT:.*]]) |
| 12 | // CHECK-NEXT: entry: |
| 13 | // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 |
| 14 | // CHECK-NEXT: %[[ALIGNMENT_ADDR:.*]] = alloca i64, align 8 |
| 15 | // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 |
| 16 | // CHECK-NEXT: store i64 %[[ALIGNMENT]], i64* %[[ALIGNMENT_ADDR]], align 8 |
| 17 | // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 |
| 18 | // CHECK-NEXT: ret i8** %[[X_RELOADED]] |
| 19 | // CHECK-NEXT: } |
| 20 | return x; |
| 21 | } |
| 22 | |
| 23 | char **caller(char **x, unsigned long alignment) { |
| 24 | // CHECK: define i8** @{{.*}}(i8** %[[X:.*]], i64 %[[ALIGNMENT:.*]]) |
| 25 | // CHECK-NEXT: entry: |
| 26 | // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 |
| 27 | // CHECK-NEXT: %[[ALIGNMENT_ADDR:.*]] = alloca i64, align 8 |
| 28 | // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 |
| 29 | // CHECK-NEXT: store i64 %[[ALIGNMENT]], i64* %[[ALIGNMENT_ADDR]], align 8 |
| 30 | // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 |
| 31 | // CHECK-NEXT: %[[ALIGNMENT_RELOADED:.*]] = load i64, i64* %[[ALIGNMENT_ADDR]], align 8 |
| 32 | // CHECK-NEXT: %[[X_RETURNED:.*]] = call i8** @[[PASSTHROUGH]](i8** %[[X_RELOADED]], i64 %[[ALIGNMENT_RELOADED]]) |
| Roman Lebedev | aca0d13 | 2019-01-24 19:32:49 +0000 | [diff] [blame] | 33 | // CHECK-NEXT: %[[MASK:.*]] = sub i64 %[[ALIGNMENT_RELOADED]], 1 |
| Roman Lebedev | bd1c087 | 2019-01-15 09:44:25 +0000 | [diff] [blame] | 34 | // CHECK-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64 |
| 35 | // CHECK-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], %[[MASK]] |
| 36 | // CHECK-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 |
| 37 | // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64, !nosanitize |
| 38 | // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize |
| 39 | // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: |
| 40 | // 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 |
| 41 | // 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 |
| 42 | // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize |
| 43 | // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize |
| 44 | // CHECK-SANITIZE: [[CONT]]: |
| 45 | // CHECK-NEXT: call void @llvm.assume(i1 %[[MASKCOND]]) |
| 46 | // CHECK-NEXT: ret i8** %[[X_RETURNED]] |
| 47 | // CHECK-NEXT: } |
| 48 | #line 100 |
| 49 | return passthrough(x, alignment); |
| 50 | } |