ceph/src/boost/boost/stacktrace/detail/location_from_symbol.hpp

   1 // Copyright Antony Polukhin, 2016-2017.
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_STACKTRACE_DETAIL_LOCATION_FROM_SYMBOL_HPP
   8 #define BOOST_STACKTRACE_DETAIL_LOCATION_FROM_SYMBOL_HPP
   9
  10 #include <boost/config.hpp>
  11 #ifdef BOOST_HAS_PRAGMA_ONCE
  12 #   pragma once
  13 #endif
  14
  15 #if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
  16 #   include <dlfcn.h>
  17 #else
  18 #   include <boost/detail/winapi/dll.hpp>
  19 #endif
  20
  21 namespace boost { namespace stacktrace { namespace detail {
  22
  23 #if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
  24 class location_from_symbol {
  25     ::Dl_info dli_;
  26
  27 public:
  28     explicit location_from_symbol(const void* addr) BOOST_NOEXCEPT
  29         : dli_()
  30     {
  31         if (!::dladdr(addr, &dli_)) {
  32             dli_.dli_fname = 0;
  33         }
  34     }
  35
  36     bool empty() const BOOST_NOEXCEPT {
  37         return !dli_.dli_fname;
  38     }
  39
  40     const char* name() const BOOST_NOEXCEPT {
  41         return dli_.dli_fname;
  42     }
  43 };
  44
  45 class program_location {
  46 public:
  47     const char* name() const BOOST_NOEXCEPT {
  48         return 0;
  49     }
  50 };
  51
  52 #else
  53
  54 class location_from_symbol {
  55     BOOST_STATIC_CONSTEXPR boost::detail::winapi::DWORD_ DEFAULT_PATH_SIZE_ = 260;
  56     char file_name_[DEFAULT_PATH_SIZE_];
  57
  58 public:
  59     explicit location_from_symbol(const void* addr) BOOST_NOEXCEPT {
  60         file_name_[0] = '\0';
  61
  62         boost::detail::winapi::MEMORY_BASIC_INFORMATION_ mbi;
  63         if (!boost::detail::winapi::VirtualQuery(addr, &mbi, sizeof(mbi))) {
  64             return;
  65         }
  66
  67         boost::detail::winapi::HMODULE_ handle = reinterpret_cast<boost::detail::winapi::HMODULE_>(mbi.AllocationBase);
  68         if (!boost::detail::winapi::GetModuleFileNameA(handle, file_name_, DEFAULT_PATH_SIZE_)) {
  69             file_name_[0] = '\0';
  70             return;
  71         }
  72     }
  73
  74     bool empty() const BOOST_NOEXCEPT {
  75         return file_name_[0] == '\0';
  76     }
  77
  78     const char* name() const BOOST_NOEXCEPT {
  79         return file_name_;
  80     }
  81 };
  82
  83 class program_location {
  84     BOOST_STATIC_CONSTEXPR boost::detail::winapi::DWORD_ DEFAULT_PATH_SIZE_ = 260;
  85     char file_name_[DEFAULT_PATH_SIZE_];
  86
  87 public:
  88     program_location() BOOST_NOEXCEPT {
  89         file_name_[0] = '\0';
  90
  91         const boost::detail::winapi::HMODULE_ handle = 0;
  92         if (!boost::detail::winapi::GetModuleFileNameA(handle, file_name_, DEFAULT_PATH_SIZE_)) {
  93             file_name_[0] = '\0';
  94         }
  95     }
  96
  97     const char* name() const BOOST_NOEXCEPT {
  98         return file_name_[0] ? file_name_ : 0;
  99     }
 100 };
 101 #endif
 102
 103 }}} // namespace boost::stacktrace::detail
 104
 105 #endif // BOOST_STACKTRACE_DETAIL_LOCATION_FROM_SYMBOL_HPP