c5978f42ec
Sometimes people get minimal crash reports after a UBSAN incident. This change tags each trap with an integer representing the kind of failure encountered, which can aid in tracking down the root cause of the problem.
41 lines
3.7 KiB
C++
41 lines
3.7 KiB
C++
// 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
|
|
|
|
typedef char **__attribute__((align_value(0x80000000))) aligned_char;
|
|
|
|
struct ac_struct {
|
|
// CHECK: %[[STRUCT_AC_STRUCT:.*]] = type { i8** }
|
|
aligned_char a;
|
|
};
|
|
|
|
// CHECK-SANITIZE-ANYRECOVER: @[[ALIGNED_CHAR:.*]] = {{.*}} c"'aligned_char' (aka 'char **')\00" }
|
|
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 13 }, {{.*}}* @[[ALIGNED_CHAR]] }
|
|
|
|
char **load_from_ac_struct(struct ac_struct *x) {
|
|
// CHECK: define i8** @{{.*}}(%[[STRUCT_AC_STRUCT]]* %[[X:.*]])
|
|
// CHECK-NEXT: [[ENTRY:.*]]:
|
|
// CHECK-NEXT: %[[STRUCT_AC_STRUCT_ADDR:.*]] = alloca %[[STRUCT_AC_STRUCT]]*, align 8
|
|
// CHECK-NEXT: store %[[STRUCT_AC_STRUCT]]* %[[X]], %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8
|
|
// CHECK-NEXT: %[[X_RELOADED:.*]] = load %[[STRUCT_AC_STRUCT]]*, %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8
|
|
// CHECK: %[[A_ADDR:.*]] = getelementptr inbounds %[[STRUCT_AC_STRUCT]], %[[STRUCT_AC_STRUCT]]* %[[X_RELOADED]], i32 0, i32 0
|
|
// CHECK: %[[A:.*]] = load i8**, i8*** %[[A_ADDR]], align 8
|
|
// CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[A]] to i64
|
|
// CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 2147483647
|
|
// CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0
|
|
// CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[A]] 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 2147483648, 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 2147483648, i64 0){{.*}}, !nosanitize
|
|
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize
|
|
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
|
|
// CHECK-SANITIZE: [[CONT]]:
|
|
// CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8** %[[A]], i64 2147483648) ]
|
|
// CHECK-NEXT: ret i8** %[[A]]
|
|
// CHECK-NEXT: }
|
|
#line 100
|
|
return x->a;
|
|
}
|