51 lines
4.3 KiB
C++
51 lines
4.3 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
|
|
// 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-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64
|
|
// CHECK-SANITIZE-NEXT: %[[MASK:.*]] = sub i64 %[[ALIGNMENT_RELOADED]], 1
|
|
// CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], %[[MASK]]
|
|
// CHECK-SANITIZE-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.ubsantrap(i8 23){{.*}}, !nosanitize
|
|
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
|
|
// CHECK-SANITIZE: [[CONT]]:
|
|
// CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8** %[[X_RETURNED]], i64 %1) ]
|
|
// CHECK-NEXT: ret i8** %[[X_RETURNED]]
|
|
// CHECK-NEXT: }
|
|
#line 100
|
|
return passthrough(x, alignment);
|
|
}
|