external/bsd/atf/dist/atf-c++/detail/exceptions.cpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 #if defined(HAVE_CONFIG_H)
  31 #include "bconfig.h"
  32 #endif
  33
  34 #include <cstdarg>
  35 #include <cstdio>
  36 #include <cstring>
  37 #include <new>
  38
  39 extern "C" {
  40 #include "../../atf-c/error.h"
  41 };
  42
  43 #include "exceptions.hpp"
  44 #include "sanity.hpp"
  45
  46 // ------------------------------------------------------------------------
  47 // The "system_error" type.
  48 // ------------------------------------------------------------------------
  49
  50 atf::system_error::system_error(const std::string& who,
  51                                 const std::string& message,
  52                                 int sys_err) :
  53     std::runtime_error(who + ": " + message),
  54     m_sys_err(sys_err)
  55 {
  56 }
  57
  58 atf::system_error::~system_error(void)
  59     throw()
  60 {
  61 }
  62
  63 int
  64 atf::system_error::code(void)
  65     const
  66     throw()
  67 {
  68     return m_sys_err;
  69 }
  70
  71 const char*
  72 atf::system_error::what(void)
  73     const
  74     throw()
  75 {
  76     try {
  77         if (m_message.length() == 0) {
  78             m_message = std::string(std::runtime_error::what()) + ": ";
  79             m_message += ::strerror(m_sys_err);
  80         }
  81
  82         return m_message.c_str();
  83     } catch (...) {
  84         return "Unable to format system_error message";
  85     }
  86 }
  87
  88 // ------------------------------------------------------------------------
  89 // Free functions.
  90 // ------------------------------------------------------------------------
  91
  92 static
  93 void
  94 throw_libc_error(atf_error_t err)
  95 {
  96     PRE(atf_error_is(err, "libc"));
  97
  98     const int ecode = atf_libc_error_code(err);
  99     const std::string msg = atf_libc_error_msg(err);
 100     atf_error_free(err);
 101     throw atf::system_error("XXX", msg, ecode);
 102 }
 103
 104 static
 105 void
 106 throw_no_memory_error(atf_error_t err)
 107 {
 108     PRE(atf_error_is(err, "no_memory"));
 109
 110     atf_error_free(err);
 111     throw std::bad_alloc();
 112 }
 113
 114 static
 115 void
 116 throw_unknown_error(atf_error_t err)
 117 {
 118     PRE(atf_is_error(err));
 119
 120     static char buf[4096];
 121     atf_error_format(err, buf, sizeof(buf));
 122     atf_error_free(err);
 123     throw std::runtime_error(buf);
 124 }
 125
 126 void
 127 atf::throw_atf_error(atf_error_t err)
 128 {
 129     static struct handler {
 130         const char* m_name;
 131         void (*m_func)(atf_error_t);
 132     } handlers[] = {
 133         { "libc", throw_libc_error },
 134         { "no_memory", throw_no_memory_error },
 135         { NULL, throw_unknown_error },
 136     };
 137
 138     PRE(atf_is_error(err));
 139
 140     handler* h = handlers;
 141     while (h->m_name != NULL) {
 142         if (atf_error_is(err, h->m_name)) {
 143             h->m_func(err);
 144             UNREACHABLE;
 145         } else
 146             h++;
 147     }
 148     // XXX: I'm not sure that raising an "unknown" error is a wise thing
 149     // to do here.  The C++ binding is supposed to have feature parity
 150     // with the C one, so all possible errors raised by the C library
 151     // should have their counterpart in the C++ library.  Still, removing
 152     // this will require some code auditing that I can't afford at the
 153     // moment.
 154     INV(h->m_name == NULL && h->m_func != NULL);
 155     h->m_func(err);
 156     UNREACHABLE;
 157 }