5efc81166d
_LIBCPP_HIDE_FROM_ABI (which is what _LIBCPP_INLINE_VISIBILITY is) uses ABI tags to avoid ODR violations when linking together object files compiled against different versions of libc++. However, pointer authentication uses the mangled name of the function to sign the function pointer in the vtable, which means that the ABI tag effectively changes how the pointers are signed. This leads to PAC failures when passing an object that holds one of these pointers in its vtable across an ABI boundary: one side will sign the pointer using one function mangling (with one ABI tag), and the other side will authenticate the pointer expecting it to have a different mangled name, which won't work. To make sure this does not regress in the future, this patch also adds a clang-query test to detect incorrect applications of _LIBCPP_HIDE_FROM_ABI. Differential Revision: https://reviews.llvm.org/D140453
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
|
|
#define _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
|
|
|
|
#include <__availability>
|
|
#include <__config>
|
|
#include <__filesystem/path.h>
|
|
#include <__memory/shared_ptr.h>
|
|
#include <__utility/forward.h>
|
|
#include <iosfwd>
|
|
#include <new>
|
|
#include <system_error>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
|
|
|
|
class _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error {
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
filesystem_error(const string& __what, error_code __ec)
|
|
: system_error(__ec, __what),
|
|
__storage_(make_shared<_Storage>(path(), path())) {
|
|
__create_what(0);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
filesystem_error(const string& __what, const path& __p1, error_code __ec)
|
|
: system_error(__ec, __what),
|
|
__storage_(make_shared<_Storage>(__p1, path())) {
|
|
__create_what(1);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
filesystem_error(const string& __what, const path& __p1, const path& __p2,
|
|
error_code __ec)
|
|
: system_error(__ec, __what),
|
|
__storage_(make_shared<_Storage>(__p1, __p2)) {
|
|
__create_what(2);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const path& path1() const noexcept { return __storage_->__p1_; }
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const path& path2() const noexcept { return __storage_->__p2_; }
|
|
|
|
filesystem_error(const filesystem_error&) = default;
|
|
~filesystem_error() override; // key function
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL
|
|
const char* what() const noexcept override {
|
|
return __storage_->__what_.c_str();
|
|
}
|
|
|
|
void __create_what(int __num_paths);
|
|
|
|
private:
|
|
struct _LIBCPP_HIDDEN _Storage {
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
|
|
|
|
path __p1_;
|
|
path __p2_;
|
|
string __what_;
|
|
};
|
|
shared_ptr<_Storage> __storage_;
|
|
};
|
|
|
|
// TODO(ldionne): We need to pop the pragma and push it again after
|
|
// filesystem_error to work around PR41078.
|
|
_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
|
|
|
|
template <class... _Args>
|
|
_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
void __throw_filesystem_error(_Args&&... __args) {
|
|
throw filesystem_error(_VSTD::forward<_Args>(__args)...);
|
|
}
|
|
#else
|
|
void __throw_filesystem_error(_Args&&...) {
|
|
_VSTD::abort();
|
|
}
|
|
#endif
|
|
_LIBCPP_AVAILABILITY_FILESYSTEM_POP
|
|
|
|
_LIBCPP_END_NAMESPACE_FILESYSTEM
|
|
|
|
#endif // _LIBCPP_CXX03_LANG
|
|
|
|
#endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
|