ios如何生成crash报告

#include <signal.h>
#include <execinfo.h>

void  OnProcessExceptionHandler(int sigl)
{
    do
    {
        std::string str = "";

        void* arrayList[];
        int count = backtrace(arrayList, );
        char** pStr = backtrace_symbols(arrayList, count);
        if (pStr == NULL)
            break;

        for (int i=; i<count; i++)
        {
            str += pStr[i];
            str += "\n";
        }

        if (str.size() <= )
            break;

        char buffer[] = "";
        time_t t = time(NULL);
        tm* pTm  = localtime(&t);
        sprintf(buffer, "[TRACE]%02d:%02d:%02d : \n", pTm->tm_hour,pTm->tm_min,pTm->tm_sec);

        std::string logFile = "";//writeable dir
        logFile += "exception.txt";
        FILE* pFile = fopen(logFile.c_str(), "ab");
        if (pFile == NULL)
            break;

        fwrite(buffer, strlen(buffer), , pFile);
        fwrite(str.c_str(), str.size(), , pFile);
        fclose(pFile);
    }
    while (false);

    exit();
}

int _tmain(int argc, _TCHAR* argv[])
{
    signal(SIGQUIT, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGILL, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGTRAP, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGABRT, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGEMT, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGFPE, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGBUS, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGSEGV, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGSYS, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGPIPE, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGALRM, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGXCPU, CrashReportSystem::OnProcessExceptionHandler);
    signal(SIGXFSZ, CrashReportSystem::OnProcessExceptionHandler);

    return ;
}