{

const int stderr=2;

{

const char e1[] =

"\nArmory has crashed. Please provide the following "

"in your bug report:\n"

"Failed to dereference address ";

::write(stderr, e1, sizeof(e1)-1);

}

{

char addr[64];

int num = snprintf(addr, sizeof(addr), "%p", info->si_addr);

::write(stderr, addr, num);

::write(stderr, "\n", 1);

}

void* bt_buffer[64];

int n = backtrace(bt_buffer, sizeof(bt_buffer)/sizeof(bt_buffer[0]));

backtrace_symbols_fd(bt_buffer, n, stderr);

// allow crash again, so that the user sees the pretty "Segmentation fault"

signal(SIGSEGV, 0);

// now try to write that same error to the log file

// since Log::filename accesses what might be corrupt memory,

// we have to repeat some of the stuff above. So it can crash

// here and we still get a log on stderr

int log = open(Log::filename().c_str(), O_APPEND, O_WRONLY);

if (log != -1)

{

{

const char e1[] =

"\n\nSIGSEGV\n"

"Failed to dereference address ";

::write(log, e1, sizeof(e1)-1);

}

{

char addr[64];

int num = snprintf(addr, sizeof(addr), "%p", info->si_addr);

::write(log, addr, num);

::write(log, "\n", 1);

}

backtrace_symbols_fd(bt_buffer, n, log);

::close(log);

}

// now actually crash again so the user sees the error

int *crash = (int*)0;

*crash = 0;

{

static bool installed=false;

if (installed)

return;

installed = true;

struct sigaction action;

action.sa_sigaction = sigsegv;

action.sa_flags = SA_SIGINFO | SA_NODEFER;

sigaction(SIGSEGV, &action, 0);

{

Init()

{

installSignalHandler();

}