| 1 | // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE |
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| 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 |
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| 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 |
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| 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 |
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| 5 | |
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| 6 | typedef char **__attribute__((align_value(0x80000000))) aligned_char; |
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| 7 | |
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| 8 | struct ac_struct { |
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| 9 | // CHECK: %[[STRUCT_AC_STRUCT:.*]] = type { i8** } |
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| 10 | aligned_char a; |
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| 11 | }; |
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| 12 | |
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| 13 | // CHECK-SANITIZE-ANYRECOVER: @[[ALIGNED_CHAR:.*]] = {{.*}} c"'aligned_char' (aka 'char **')\00" } |
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| 14 | // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 13 }, {{.*}}* @[[ALIGNED_CHAR]] } |
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| 15 | |
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| 16 | char **load_from_ac_struct(struct ac_struct *x) { |
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| 17 | // CHECK: define i8** @{{.*}}(%[[STRUCT_AC_STRUCT]]* %[[X:.*]]) |
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| 18 | // CHECK-NEXT: [[ENTRY:.*]]: |
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| 19 | // CHECK-NEXT: %[[STRUCT_AC_STRUCT_ADDR:.*]] = alloca %[[STRUCT_AC_STRUCT]]*, align 8 |
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| 20 | // CHECK-NEXT: store %[[STRUCT_AC_STRUCT]]* %[[X]], %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8 |
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| 21 | // CHECK-NEXT: %[[X_RELOADED:.*]] = load %[[STRUCT_AC_STRUCT]]*, %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8 |
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| 22 | // CHECK: %[[A_ADDR:.*]] = getelementptr inbounds %[[STRUCT_AC_STRUCT]], %[[STRUCT_AC_STRUCT]]* %[[X_RELOADED]], i32 0, i32 0 |
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| 23 | // CHECK: %[[A:.*]] = load i8**, i8*** %[[A_ADDR]], align 8 |
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| 24 | // CHECK-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[A]] to i64 |
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| 25 | // CHECK-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 2147483647 |
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| 26 | // CHECK-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 |
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| 27 | // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[A]] to i64, !nosanitize |
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| 28 | // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize |
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| 29 | // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: |
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| 30 | // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 2147483648, i64 0){{.*}}, !nosanitize |
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| 31 | // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 2147483648, i64 0){{.*}}, !nosanitize |
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| 32 | // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize |
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| 33 | // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize |
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| 34 | // CHECK-SANITIZE: [[CONT]]: |
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| 35 | // CHECK-NEXT: call void @llvm.assume(i1 %[[MASKCOND]]) |
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| 36 | // CHECK-NEXT: ret i8** %[[A]] |
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| 37 | // CHECK-NEXT: } |
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| 38 | #line 100 |
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| 39 | return x->a; |
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| 40 | } |
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| 41 | |
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