text: /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   *
   *  Data Differential YATL (i.e. libtest)  library
   *
   *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions are
   *  met:
   *
   *      * Redistributions of source code must retain the above copyright
   *  notice, this list of conditions and the following disclaimer.
   *
   *      * Redistributions in binary form must reproduce the above
   *  copyright notice, this list of conditions and the following disclaimer
   *  in the documentation and/or other materials provided with the
   *  distribution.
   *
   *      * The names of its contributors may not be used to endorse or
   *  promote products derived from this software without specific prior
   *  written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #include <cerrno>
  #include <csignal>
  #include <cstdio>
  #include <cstdlib>
  #include <cstring>
  #include <iostream>
  
  #include "libmemcached/backtrace.hpp"
  
  class Test {
  public:
    Test()
    {
    }
  
    void call_backtrace()
    {
      std::cerr << __func__ << std::endl;
      custom_backtrace();
    }
  };
  
  void SIGSEGV_handler(int sig_num, siginfo_t* info, void* ucontext)
  {
    std::cerr << __func__ << std::endl;
    (void)sig_num;
    (void)info;
    (void)ucontext;
  
    custom_backtrace();
  }
  
  int raise_SIGSEGV()
  {
    std::cerr << std::endl << "Calling backtrace()" << std::endl;
    custom_backtrace();
    std::cerr << std::endl << "Calling raise()" << std::endl;
    return raise(SIGSEGV);
  }
  
  int layer4()
  {
    return raise_SIGSEGV();
  }
  
  int layer3()
  {
    return layer4();
  }
  
  int layer2()
  {
    return layer3();
  }
  
  int layer1()
  {
    return layer2();
  }
  
  int main(int, char **)
  {
    Test t;
  
    t.call_backtrace();
  
    struct sigaction sigact;
  
    sigact.sa_sigaction= SIGSEGV_handler;
    sigact.sa_flags= SA_RESTART | SA_SIGINFO;
  
    if (sigaction(SIGSEGV, &sigact, (struct sigaction *)NULL) != 0)
    {
      std::cerr << "error setting signal handler for " << strsignal(SIGSEGV) << "(" <<  SIGSEGV << ")" << std::endl;
  
      exit(EXIT_FAILURE);
    }
  
    int ret= layer1();
    if (ret)
    {
      std::cerr << "raise() " << strerror(errno) << std::endl;
      exit(EXIT_FAILURE);
    }
  
    exit(EXIT_SUCCESS);
  }
  