/usr/include/hphp/util/unwind-itanium.h is in hhvm-dev 3.21.0+dfsg-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | /*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_UTIL_UNWIND_ITANIUM_H_
#define incl_HPHP_UTIL_UNWIND_ITANIUM_H_
#include <cstdint>
#include <exception>
#include <typeinfo>
#ifndef _MSC_VER
#include <unwind.h>
#else
#include "hphp/util/unwind-itanium-msvc.h"
#endif
namespace HPHP {
///////////////////////////////////////////////////////////////////////////////
/*
* Exception handling helpers for libsupc++ unwinding internals.
*
* These make use of data structures that do not appear to be defined in the
* Itanium C++ exception handling ABI, but nonetheless seem to be shared
* between at least g++ and clang across multiple platforms.
*
* See libstdc++-v3/libsupc++/unwind-cxx.h in libgcc.
*/
namespace detail {
/*
* Mirrors __cxxabiv1::__is_dependent_exception().
*/
inline bool is_dependent_exception(uint64_t c) {
return (c & 1);
}
}
/*
* Like __cxxabiv1::__get_object_from_ue()
*/
inline void*
exceptionFromUE(_Unwind_Exception* eo) {
#ifdef __APPLE__
constexpr size_t sizeOfDependentException = 120;
#else
constexpr size_t sizeOfDependentException = 112;
#endif
if (detail::is_dependent_exception(eo->exception_class)) {
return *reinterpret_cast<std::exception**>(
reinterpret_cast<char*>(eo + 1) - sizeOfDependentException);
}
return eo + 1;
}
/*
* Like __cxxabiv1::__get{_refcounted_,}_exception_header_from_{obj,ue}(), but
* extracts the type_info* member.
*/
inline const std::type_info&
typeinfoFromUE(_Unwind_Exception* eo) {
auto const obj = exceptionFromUE(eo);
constexpr size_t sizeOfCxaException = 112;
return **reinterpret_cast<std::type_info**>(
static_cast<char*>(obj) - sizeOfCxaException);
}
///////////////////////////////////////////////////////////////////////////////
}
#endif
|