gearman/libtest/backtrace_test.cc

/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Data Differential YATL (i.e. libtest)  library
 *
 *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
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#include <cerrno>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>

#include "libgearman/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);
}