コード例 #1
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
//----------------------------------------------------------------------
// MachTask::Resume
//----------------------------------------------------------------------
kern_return_t
MachTask::Resume()
{
    struct task_basic_info task_info;
    task_t task = TaskPort();
	if (task == TASK_NULL)
		return KERN_INVALID_ARGUMENT;

    DNBError err;
    err = BasicInfo(task, &task_info);

    if (err.Success())
    {
		// task_resume isn't counted like task_suspend calls are, are, so if the 
		// task is not suspended, don't try and resume it since it is already 
		// running
		if (task_info.suspend_count > 0)
        {
            err = ::task_resume (task);
            if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
                err.LogThreaded("::task_resume ( target_task = 0x%4.4x )", task);
        }
    }
    return err.Error();
}
コード例 #2
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
//----------------------------------------------------------------------
// MachTask::AllocateMemory
//----------------------------------------------------------------------
nub_addr_t
MachTask::AllocateMemory (size_t size, uint32_t permissions)
{
    mach_vm_address_t addr;
    task_t task = TaskPort();
    if (task == TASK_NULL)
        return INVALID_NUB_ADDRESS;

    DNBError err;
    err = ::mach_vm_allocate (task, &addr, size, TRUE);
    if (err.Error() == KERN_SUCCESS)
    {
        // Set the protections:
        vm_prot_t mach_prot = VM_PROT_NONE;
        if (permissions & eMemoryPermissionsReadable)
            mach_prot |= VM_PROT_READ;
        if (permissions & eMemoryPermissionsWritable)
            mach_prot |= VM_PROT_WRITE;
        if (permissions & eMemoryPermissionsExecutable)
            mach_prot |= VM_PROT_EXECUTE;


        err = ::mach_vm_protect (task, addr, size, 0, mach_prot);
        if (err.Error() == KERN_SUCCESS)
        {
            m_allocations.insert (std::make_pair(addr, size));
            return addr;
        }
        ::mach_vm_deallocate (task, addr, size);
    }
    return INVALID_NUB_ADDRESS;
}
コード例 #3
0
ファイル: RNBSocket.cpp プロジェクト: markpeek/lldb
rnb_err_t
RNBSocket::Write (const void *buffer, size_t length)
{
    if (m_fd == -1)
        return rnb_err;

    DNBError err;
    int bytessent = send (m_fd, buffer, length, 0);
    if (bytessent < 0)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::send ( socket = %i, buffer = %p, length = %zu, flags = 0 ) => %i", m_fd, buffer, length, bytessent);

    if (bytessent < 0)
        return rnb_err;

    if (bytessent != length)
        return rnb_err;

    DNBLogThreadedIf(LOG_RNB_PACKETS, "putpkt: %*s", (int)length, (char *)buffer);   // All data is string based in debugserver, so this is safe
    DNBLogThreadedIf(LOG_RNB_COMM, "sent: %*s", (int)length, (char *)buffer);

    return rnb_success;
}
コード例 #4
0
ファイル: MachTask.cpp プロジェクト: Keno/lldb
//----------------------------------------------------------------------
// MachTask::BasicInfo
//----------------------------------------------------------------------
kern_return_t
MachTask::BasicInfo(task_t task, struct task_basic_info *info)
{
    if (info == NULL)
        return KERN_INVALID_ARGUMENT;

    DNBError err;
    mach_msg_type_number_t count = TASK_BASIC_INFO_COUNT;
    err = ::task_info (task, TASK_BASIC_INFO, (task_info_t)info, &count);
    const bool log_process = DNBLogCheckLogBit(LOG_TASK);
    if (log_process || err.Fail())
        err.LogThreaded("::task_info ( target_task = 0x%4.4x, flavor = TASK_BASIC_INFO, task_info_out => %p, task_info_outCnt => %u )", task, info, count);
    if (DNBLogCheckLogBit(LOG_TASK) && DNBLogCheckLogBit(LOG_VERBOSE) && err.Success())
    {
        float user = (float)info->user_time.seconds + (float)info->user_time.microseconds / 1000000.0f;
        float system = (float)info->user_time.seconds + (float)info->user_time.microseconds / 1000000.0f;
        DNBLogThreaded ("task_basic_info = { suspend_count = %i, virtual_size = 0x%8.8llx, resident_size = 0x%8.8llx, user_time = %f, system_time = %f }",
                        info->suspend_count, 
                        (uint64_t)info->virtual_size, 
                        (uint64_t)info->resident_size, 
                        user, 
                        system);
    }
    return err.Error();
}
コード例 #5
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
kern_return_t
MachTask::ShutDownExcecptionThread()
{
    DNBError err;

    err = RestoreExceptionPortInfo();

    // NULL our our exception port and let our exception thread exit
    mach_port_t exception_port = m_exception_port;
    m_exception_port = NULL;

    err.SetError(::pthread_cancel(m_exception_thread), DNBError::POSIX);
    if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
        err.LogThreaded("::pthread_cancel ( thread = %p )", m_exception_thread);

    err.SetError(::pthread_join(m_exception_thread, NULL), DNBError::POSIX);
    if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
        err.LogThreaded("::pthread_join ( thread = %p, value_ptr = NULL)", m_exception_thread);

    // Deallocate our exception port that we used to track our child process
    mach_port_t task_self = mach_task_self ();
    err = ::mach_port_deallocate (task_self, exception_port);
    if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
        err.LogThreaded("::mach_port_deallocate ( task = 0x%4.4x, name = 0x%4.4x )", task_self, exception_port);
    exception_port = NULL;

    return err.Error();
}
コード例 #6
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
//----------------------------------------------------------------------
// MachTask::Suspend
//----------------------------------------------------------------------
kern_return_t
MachTask::Suspend()
{
    DNBError err;
    task_t task = TaskPort();
    err = ::task_suspend (task);
    if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
        err.LogThreaded("::task_suspend ( target_task = 0x%4.4x )", task);
    return err.Error();
}
コード例 #7
0
ファイル: MachException.cpp プロジェクト: eightcien/lldb
kern_return_t
MachException::PortInfo::Save (task_t task)
{
    count = (sizeof (ports) / sizeof (ports[0]));
    DNBLogThreadedIf(LOG_EXCEPTIONS | LOG_VERBOSE, "MachException::PortInfo::Save ( task = 0x%4.4x )", task);
    DNBError err;
    err = ::task_get_exception_ports (task, EXC_MASK_ALL, masks, &count, ports, behaviors, flavors);
    if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
        err.LogThreaded("::task_get_exception_ports ( task = 0x%4.4x, mask = 0x%x, maskCnt => %u, ports, behaviors, flavors )", task, EXC_MASK_ALL, count);
    if (err.Fail())
        count = 0;
    return err.Error();
}
コード例 #8
0
ファイル: MachException.cpp プロジェクト: eightcien/lldb
kern_return_t
MachException::Message::Receive(mach_port_t port, mach_msg_option_t options, mach_msg_timeout_t timeout, mach_port_t notify_port)
{
    DNBError err;
    const bool log_exceptions = DNBLogCheckLogBit(LOG_EXCEPTIONS);
    mach_msg_timeout_t mach_msg_timeout = options & MACH_RCV_TIMEOUT ? timeout : 0;
    if (log_exceptions && ((options & MACH_RCV_TIMEOUT) == 0))
    {
        // Dump this log message if we have no timeout in case it never returns
        DNBLogThreaded("::mach_msg ( msg->{bits = %#x, size = %u remote_port = %#x, local_port = %#x, reserved = 0x%x, id = 0x%x}, option = %#x, send_size = %u, rcv_size = %u, rcv_name = %#x, timeout = %u, notify = %#x)",
                exc_msg.hdr.msgh_bits,
                exc_msg.hdr.msgh_size,
                exc_msg.hdr.msgh_remote_port,
                exc_msg.hdr.msgh_local_port,
                exc_msg.hdr.msgh_reserved,
                exc_msg.hdr.msgh_id,
                options,
                0,
                sizeof (exc_msg.data),
                port,
                mach_msg_timeout,
                notify_port);
    }

    err = ::mach_msg (&exc_msg.hdr,
                      options,                  // options
                      0,                        // Send size
                      sizeof (exc_msg.data),    // Receive size
                      port,                     // exception port to watch for exception on
                      mach_msg_timeout,         // timeout in msec (obeyed only if MACH_RCV_TIMEOUT is ORed into the options parameter)
                      notify_port);

    // Dump any errors we get
    if (log_exceptions)
    {
        err.LogThreaded("::mach_msg ( msg->{bits = %#x, size = %u remote_port = %#x, local_port = %#x, reserved = 0x%x, id = 0x%x}, option = %#x, send_size = %u, rcv_size = %u, rcv_name = %#x, timeout = %u, notify = %#x)",
            exc_msg.hdr.msgh_bits,
            exc_msg.hdr.msgh_size,
            exc_msg.hdr.msgh_remote_port,
            exc_msg.hdr.msgh_local_port,
            exc_msg.hdr.msgh_reserved,
            exc_msg.hdr.msgh_id,
            options,
            0,
            sizeof (exc_msg.data),
            port,
            mach_msg_timeout,
            notify_port);
    }
    return err.Error();
}
コード例 #9
0
kern_return_t
MachException::PortInfo::Save (task_t task)
{
    DNBLogThreadedIf(LOG_EXCEPTIONS | LOG_VERBOSE, "MachException::PortInfo::Save ( task = 0x%4.4x )", task);
    // Be careful to be able to have debugserver built on a newer OS than what
    // it is currently running on by being able to start with all exceptions
    // and back off to just what is supported on the current system
    DNBError err;

    mask = EXC_MASK_ALL;

    count = (sizeof (ports) / sizeof (ports[0]));
    err = ::task_get_exception_ports (task, mask, masks, &count, ports, behaviors, flavors);
    if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
        err.LogThreaded("::task_get_exception_ports ( task = 0x%4.4x, mask = 0x%x, maskCnt => %u, ports, behaviors, flavors )", task, mask, count);

    if (err.Error() == KERN_INVALID_ARGUMENT && mask != PREV_EXC_MASK_ALL)
    {
        mask = PREV_EXC_MASK_ALL;
        count = (sizeof (ports) / sizeof (ports[0]));
        err = ::task_get_exception_ports (task, mask, masks, &count, ports, behaviors, flavors);
        if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
            err.LogThreaded("::task_get_exception_ports ( task = 0x%4.4x, mask = 0x%x, maskCnt => %u, ports, behaviors, flavors )", task, mask, count);
    }
    if (err.Fail())
    {
        mask = 0;
        count = 0;
    }
    return err.Error();
}
コード例 #10
0
ファイル: MachThread.cpp プロジェクト: filcab/lldb
bool
MachThread::SetSuspendCountBeforeResume(bool others_stopped)
{
    DNBLogThreadedIf(LOG_THREAD | LOG_VERBOSE, "MachThread::%s ( )", __FUNCTION__);
    DNBError err;
    if (ThreadIDIsValid(m_tid) == false)
        return false;
        
    size_t times_to_resume;
        
    if (others_stopped)
    {
        if (GetBasicInfo())
        {
            times_to_resume = m_basic_info.suspend_count;
            m_suspend_count = - (times_to_resume - m_suspend_count);
        }
        else
            times_to_resume = 0;
    }
    else
    {
        times_to_resume = m_suspend_count;
        m_suspend_count = 0;
    }

    if (times_to_resume > 0)
    {
        while (times_to_resume > 0)
        {
            err = ::thread_resume (m_tid);
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
                err.LogThreaded("::thread_resume (%4.4x)", m_tid);
            if (err.Success())
                --times_to_resume;
            else
            {
                if (GetBasicInfo())
                    times_to_resume = m_basic_info.suspend_count;
                else
                    times_to_resume = 0;
            }
        }
    }
    return true;
}
コード例 #11
0
ファイル: MachThread.cpp プロジェクト: ice799/lldb
bool
MachThread::RestoreSuspendCount()
{
    DNBLogThreadedIf(LOG_THREAD | LOG_VERBOSE, "MachThread::%s ( )", __FUNCTION__);
    DNBError err;
    if (ThreadIDIsValid(m_tid) == false)
        return false;
    else if (m_suspendCount > m_basicInfo.suspend_count)
    {
        while (m_suspendCount > m_basicInfo.suspend_count)
        {
            err = ::thread_resume (m_tid);
            if (err.Success())
                --m_suspendCount;
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
                err.LogThreaded("::thread_resume (%4.4x)", m_tid);
        }
    }
    else if (m_suspendCount < m_basicInfo.suspend_count)
    {
        while (m_suspendCount < m_basicInfo.suspend_count)
        {
            err = ::thread_suspend (m_tid);
            if (err.Success())
                --m_suspendCount;
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
                err.LogThreaded("::thread_suspend (%4.4x)", m_tid);
        }
    }
    return  m_suspendCount == m_basicInfo.suspend_count;
}
コード例 #12
0
ファイル: MachThread.cpp プロジェクト: eightcien/lldb
bool
MachThread::RestoreSuspendCount()
{
    DNBLogThreadedIf(LOG_THREAD | LOG_VERBOSE, "MachThread::%s ( )", __FUNCTION__);
    DNBError err;
    if (ThreadIDIsValid(m_tid) == false)
        return false;
    if (m_suspendCount > 0)
    {
        while (m_suspendCount > 0)
        {
            err = ::thread_resume (m_tid);
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
                err.LogThreaded("::thread_resume (%4.4x)", m_tid);
            if (err.Success())
                --m_suspendCount;
            else
            {
                if (GetBasicInfo())
                    m_suspendCount = m_basicInfo.suspend_count;
                else
                    m_suspendCount = 0;
                return false; // ??? 
            }
        }
    }
    // We don't currently really support resuming a thread that was externally
    // suspended. If/when we do, we will need to make the code below work and
    // m_suspendCount will need to become signed instead of unsigned.
//    else if (m_suspendCount < 0)
//    {
//        while (m_suspendCount < 0)
//        {
//            err = ::thread_suspend (m_tid);
//            if (err.Success())
//                ++m_suspendCount;
//            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
//                err.LogThreaded("::thread_suspend (%4.4x)", m_tid);
//        }
//    }
    return true;
}
コード例 #13
0
ファイル: RNBSocket.cpp プロジェクト: markpeek/lldb
rnb_err_t
RNBSocket::Read (std::string &p)
{
    char buf[1024];
    p.clear();

    // Note that BUF is on the stack so we must be careful to keep any
    // writes to BUF from overflowing or we'll have security issues.

    if (m_fd == -1)
        return rnb_err;

    //DNBLogThreadedIf(LOG_RNB_COMM, "%8u RNBSocket::%s calling read()", (uint32_t)m_timer.ElapsedMicroSeconds(true), __FUNCTION__);
    DNBError err;
    int bytesread = read (m_fd, buf, sizeof (buf));
    if (bytesread <= 0)
        err.SetError(errno, DNBError::POSIX);
    else
        p.append(buf, bytesread);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::read ( %i, %p, %zu ) => %i", m_fd, buf, sizeof (buf), bytesread);

    // Our port went away - we have to mark this so IsConnected will return the truth.
    if (bytesread == 0)
    {
        m_fd = -1;
        return rnb_not_connected;
    }
    else if (bytesread == -1)
    {
        m_fd = -1;
        return rnb_err;
    }
    // Strip spaces from the end of the buffer
    while (!p.empty() && isspace (p[p.size() - 1]))
        p.erase (p.size () - 1);

    // Most data in the debugserver packets valid printable characters...
    DNBLogThreadedIf(LOG_RNB_COMM, "read: %s", p.c_str());
    return rnb_success;
}
コード例 #14
0
ファイル: MachTask.cpp プロジェクト: Keno/lldb
bool
MachTask::StartExceptionThread(DNBError &err)
{
    DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s ( )", __FUNCTION__);
    task_t task = TaskPortForProcessID(err);
    if (MachTask::IsValid(task))
    {
        // Got the mach port for the current process
        mach_port_t task_self = mach_task_self ();

        // Allocate an exception port that we will use to track our child process
        err = ::mach_port_allocate (task_self, MACH_PORT_RIGHT_RECEIVE, &m_exception_port);
        if (err.Fail())
            return false;

        // Add the ability to send messages on the new exception port
        err = ::mach_port_insert_right (task_self, m_exception_port, m_exception_port, MACH_MSG_TYPE_MAKE_SEND);
        if (err.Fail())
            return false;

        // Save the original state of the exception ports for our child process
        SaveExceptionPortInfo();

        // We weren't able to save the info for our exception ports, we must stop...
        if (m_exc_port_info.mask == 0)
        {
            err.SetErrorString("failed to get exception port info");
            return false;
        }

        // Set the ability to get all exceptions on this port
        err = ::task_set_exception_ports (task, m_exc_port_info.mask, m_exception_port, EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES, THREAD_STATE_NONE);
        if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
        {
            err.LogThreaded("::task_set_exception_ports ( task = 0x%4.4x, exception_mask = 0x%8.8x, new_port = 0x%4.4x, behavior = 0x%8.8x, new_flavor = 0x%8.8x )",
                            task,
                            m_exc_port_info.mask,
                            m_exception_port,
                            (EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES),
                            THREAD_STATE_NONE);
        }

        if (err.Fail())
            return false;

        // Create the exception thread
        err = ::pthread_create (&m_exception_thread, NULL, MachTask::ExceptionThread, this);
        return err.Success();
    }
    else
    {
        DNBLogError("MachTask::%s (): task invalid, exception thread start failed.", __FUNCTION__);
    }
    return false;
}
コード例 #15
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
nub_addr_t
MachTask::GetDYLDAllImageInfosAddress (DNBError& err)
{
    struct hack_task_dyld_info dyld_info;
    mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
    // Make sure that COUNT isn't bigger than our hacked up struct hack_task_dyld_info.
    // If it is, then make COUNT smaller to match.
    if (count > (sizeof(struct hack_task_dyld_info) / sizeof(natural_t)))
        count = (sizeof(struct hack_task_dyld_info) / sizeof(natural_t));

    task_t task = TaskPortForProcessID (err);
    if (err.Success())
    {
        err = ::task_info (task, TASK_DYLD_INFO, (task_info_t)&dyld_info, &count);
        if (err.Success())
        {
            // We now have the address of the all image infos structure
            return dyld_info.all_image_info_addr;
        }
    }
    return INVALID_NUB_ADDRESS;
}
コード例 #16
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
bool
MachTask::StartExceptionThread(DNBError &err)
{
    DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s ( )", __FUNCTION__);
    task_t task = TaskPortForProcessID(err);
    if (MachTask::IsValid(task))
    {
        // Got the mach port for the current process
        mach_port_t task_self = mach_task_self ();

        // Allocate an exception port that we will use to track our child process
        err = ::mach_port_allocate (task_self, MACH_PORT_RIGHT_RECEIVE, &m_exception_port);
        if (err.Fail())
            return false;

        // Add the ability to send messages on the new exception port
        err = ::mach_port_insert_right (task_self, m_exception_port, m_exception_port, MACH_MSG_TYPE_MAKE_SEND);
        if (err.Fail())
            return false;

        // Save the original state of the exception ports for our child process
        SaveExceptionPortInfo();

        // Set the ability to get all exceptions on this port
        err = ::task_set_exception_ports (task, EXC_MASK_ALL, m_exception_port, EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES, THREAD_STATE_NONE);
        if (err.Fail())
            return false;

        // Create the exception thread
        err = ::pthread_create (&m_exception_thread, NULL, MachTask::ExceptionThread, this);
        return err.Success();
    }
    else
    {
        DNBLogError("MachTask::%s (): task invalid, exception thread start failed.", __FUNCTION__);
    }
    return false;
}
コード例 #17
0
ファイル: RNBSocket.cpp プロジェクト: markpeek/lldb
rnb_err_t
RNBSocket::OpenFile (const char *path)
{
    DNBError err;
    m_fd = open (path, O_RDWR);
    if (m_fd == -1)
    {
        err.SetError(errno, DNBError::POSIX);
        err.LogThreaded ("can't open file '%s'", path);
        return rnb_not_connected;
    }
    else
    {
        struct termios stdin_termios;

        if (::tcgetattr (m_fd, &stdin_termios) == 0)
        {
            stdin_termios.c_lflag &= ~ECHO;     // Turn off echoing
            stdin_termios.c_lflag &= ~ICANON;   // Get one char at a time
            ::tcsetattr (m_fd, TCSANOW, &stdin_termios);
        }
    }
    return rnb_success;
}
コード例 #18
0
ファイル: MachException.cpp プロジェクト: eightcien/lldb
kern_return_t
MachException::PortInfo::Restore (task_t task)
{
    DNBLogThreadedIf(LOG_EXCEPTIONS | LOG_VERBOSE, "MachException::PortInfo::Restore( task = 0x%4.4x )", task);
    uint32_t i = 0;
    DNBError err;
    if (count > 0)
    {
        for (i = 0; i < count; i++)
        {
            err = ::task_set_exception_ports (task, masks[i], ports[i], behaviors[i], flavors[i]);
            if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
            {
                err.LogThreaded("::task_set_exception_ports ( task = 0x%4.4x, exception_mask = 0x%8.8x, new_port = 0x%4.4x, behavior = 0x%8.8x, new_flavor = 0x%8.8x )", task, masks[i], ports[i], behaviors[i], flavors[i]);
                // Bail if we encounter any errors
            }

            if (err.Fail())
                break;
        }
    }
    count = 0;
    return err.Error();
}
コード例 #19
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
//----------------------------------------------------------------------
// MachTask::TaskPortForProcessID
//----------------------------------------------------------------------
task_t
MachTask::TaskPortForProcessID (pid_t pid, DNBError &err, uint32_t num_retries, uint32_t usec_interval)
{
	if (pid != INVALID_NUB_PROCESS)
	{
		DNBError err;
		mach_port_t task_self = mach_task_self ();	
		task_t task = TASK_NULL;
		for (uint32_t i=0; i<num_retries; i++)
		{	
			err = ::task_for_pid ( task_self, pid, &task);

            if (DNBLogCheckLogBit(LOG_TASK) || err.Fail())
            {
                char str[1024];
                ::snprintf (str,
                            sizeof(str),
                            "::task_for_pid ( target_tport = 0x%4.4x, pid = %d, &task ) => err = 0x%8.8x (%s)",
                            task_self,
                            pid,
                            err.Error(),
                            err.AsString() ? err.AsString() : "success");
                if (err.Fail())
                    err.SetErrorString(str);
                err.LogThreaded(str);
            }

			if (err.Success())
				return task;

			// Sleep a bit and try again
			::usleep (usec_interval);
		}
	}
	return TASK_NULL;
}
コード例 #20
0
ファイル: MachThread.cpp プロジェクト: filcab/lldb
bool
MachThread::RestoreSuspendCountAfterStop ()
{
    DNBLogThreadedIf(LOG_THREAD | LOG_VERBOSE, "MachThread::%s ( )", __FUNCTION__);
    DNBError err;
    if (ThreadIDIsValid(m_tid) == false)
        return false;
        
    if (m_suspend_count > 0)
    {
        while (m_suspend_count > 0)
        {
            err = ::thread_resume (m_tid);
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
                err.LogThreaded("::thread_resume (%4.4x)", m_tid);
            if (err.Success())
                --m_suspend_count;
            else
            {
                if (GetBasicInfo())
                    m_suspend_count = m_basic_info.suspend_count;
                else
                    m_suspend_count = 0;
                return false; // ??? 
            }
        }
    }
    else if (m_suspend_count < 0)
    {
        while (m_suspend_count < 0)
        {
            err = ::thread_suspend (m_tid);
            if (err.Success())
                ++m_suspend_count;
            if (DNBLogCheckLogBit(LOG_THREAD) || err.Fail())
            {
                err.LogThreaded("::thread_suspend (%4.4x)", m_tid);
                return false;
            }
        }
    }
    return true;
}
コード例 #21
0
ファイル: MachTask.cpp プロジェクト: Keno/lldb
std::string
MachTask::GetProfileData (DNBProfileDataScanType scanType)
{
    std::string result;
    
    static int32_t numCPU = -1;
    struct host_cpu_load_info host_info;
    if (scanType & eProfileHostCPU)
    {
        int32_t mib[] = {CTL_HW, HW_AVAILCPU};
        size_t len = sizeof(numCPU);
        if (numCPU == -1)
        {
            if (sysctl(mib, sizeof(mib) / sizeof(int32_t), &numCPU, &len, NULL, 0) != 0)
                return result;
        }
        
        mach_port_t localHost = mach_host_self();
        mach_msg_type_number_t count = HOST_CPU_LOAD_INFO_COUNT;
        kern_return_t kr = host_statistics(localHost, HOST_CPU_LOAD_INFO, (host_info_t)&host_info, &count);
        if (kr != KERN_SUCCESS)
            return result;
    }
    
    task_t task = TaskPort();
    if (task == TASK_NULL)
        return result;
    
    struct task_basic_info task_info;
    DNBError err;
    err = BasicInfo(task, &task_info);
    
    if (!err.Success())
        return result;
    
    uint64_t elapsed_usec = 0;
    uint64_t task_used_usec = 0;
    if (scanType & eProfileCPU)
    {
        // Get current used time.
        struct timeval current_used_time;
        struct timeval tv;
        TIME_VALUE_TO_TIMEVAL(&task_info.user_time, &current_used_time);
        TIME_VALUE_TO_TIMEVAL(&task_info.system_time, &tv);
        timeradd(&current_used_time, &tv, &current_used_time);
        task_used_usec = current_used_time.tv_sec * 1000000ULL + current_used_time.tv_usec;
        
        struct timeval current_elapsed_time;
        int res = gettimeofday(&current_elapsed_time, NULL);
        if (res == 0)
        {
            elapsed_usec = current_elapsed_time.tv_sec * 1000000ULL + current_elapsed_time.tv_usec;
        }
    }
    
    std::vector<uint64_t> threads_id;
    std::vector<std::string> threads_name;
    std::vector<uint64_t> threads_used_usec;

    if (scanType & eProfileThreadsCPU)
    {
        get_threads_profile_data(scanType, task, m_process->ProcessID(), threads_id, threads_name, threads_used_usec);
    }
    
    struct vm_statistics vm_stats;
    uint64_t physical_memory;
    mach_vm_size_t rprvt = 0;
    mach_vm_size_t rsize = 0;
    mach_vm_size_t vprvt = 0;
    mach_vm_size_t vsize = 0;
    mach_vm_size_t dirty_size = 0;
    mach_vm_size_t purgeable = 0;
    mach_vm_size_t anonymous = 0;
    if (m_vm_memory.GetMemoryProfile(scanType, task, task_info, m_process->GetCPUType(), m_process->ProcessID(), vm_stats, physical_memory, rprvt, rsize, vprvt, vsize, dirty_size, purgeable, anonymous))
    {
        std::ostringstream profile_data_stream;
        
        if (scanType & eProfileHostCPU)
        {
            profile_data_stream << "num_cpu:" << numCPU << ';';
            profile_data_stream << "host_user_ticks:" << host_info.cpu_ticks[CPU_STATE_USER] << ';';
            profile_data_stream << "host_sys_ticks:" << host_info.cpu_ticks[CPU_STATE_SYSTEM] << ';';
            profile_data_stream << "host_idle_ticks:" << host_info.cpu_ticks[CPU_STATE_IDLE] << ';';
        }
        
        if (scanType & eProfileCPU)
        {
            profile_data_stream << "elapsed_usec:" << elapsed_usec << ';';
            profile_data_stream << "task_used_usec:" << task_used_usec << ';';
        }
        
        if (scanType & eProfileThreadsCPU)
        {
            int num_threads = threads_id.size();
            for (int i=0; i<num_threads; i++)
            {
                profile_data_stream << "thread_used_id:" << std::hex << threads_id[i] << std::dec << ';';
                profile_data_stream << "thread_used_usec:" << threads_used_usec[i] << ';';
                
                if (scanType & eProfileThreadName)
                {
                    profile_data_stream << "thread_used_name:";
                    int len = threads_name[i].size();
                    if (len)
                    {
                        const char *thread_name = threads_name[i].c_str();
                        // Make sure that thread name doesn't interfere with our delimiter.
                        profile_data_stream << RAW_HEXBASE << std::setw(2);
                        const uint8_t *ubuf8 = (const uint8_t *)(thread_name);
                        for (int j=0; j<len; j++)
                        {
                            profile_data_stream << (uint32_t)(ubuf8[j]);
                        }
                        // Reset back to DECIMAL.
                        profile_data_stream << DECIMAL;
                    }
                    profile_data_stream << ';';
                }
            }
        }
        
        if (scanType & eProfileHostMemory)
            profile_data_stream << "total:" << physical_memory << ';';
        
        if (scanType & eProfileMemory)
        {
            static vm_size_t pagesize;
            static bool calculated = false;
            if (!calculated)
            {
                calculated = true;
                pagesize = PageSize();
            }
            
            profile_data_stream << "wired:" << vm_stats.wire_count * pagesize << ';';
            profile_data_stream << "active:" << vm_stats.active_count * pagesize << ';';
            profile_data_stream << "inactive:" << vm_stats.inactive_count * pagesize << ';';
            uint64_t total_used_count = vm_stats.wire_count + vm_stats.inactive_count + vm_stats.active_count;
            profile_data_stream << "used:" << total_used_count * pagesize << ';';
            profile_data_stream << "free:" << vm_stats.free_count * pagesize << ';';
            
            profile_data_stream << "rprvt:" << rprvt << ';';
            profile_data_stream << "rsize:" << rsize << ';';
            profile_data_stream << "vprvt:" << vprvt << ';';
            profile_data_stream << "vsize:" << vsize << ';';
            
            if (scanType & eProfileMemoryDirtyPage)
                profile_data_stream << "dirty:" << dirty_size << ';';

            if (scanType & eProfileMemoryAnonymous)
            {
                profile_data_stream << "purgeable:" << purgeable << ';';
                profile_data_stream << "anonymous:" << anonymous << ';';
            }
        }
        
        profile_data_stream << "--end--;";
        
        result = profile_data_stream.str();
    }
    
    return result;
}
コード例 #22
0
ファイル: RNBSocket.cpp プロジェクト: markpeek/lldb
rnb_err_t
RNBSocket::Listen (in_port_t port, PortBoundCallback callback, const void *callback_baton)
{
    //DNBLogThreadedIf(LOG_RNB_COMM, "%8u RNBSocket::%s called", (uint32_t)m_timer.ElapsedMicroSeconds(true), __FUNCTION__);
    // Disconnect without saving errno
    Disconnect (false);

    DNBError err;
    int listen_fd = ::socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (listen_fd == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::socket ( domain = AF_INET, type = SOCK_STREAM, protocol = IPPROTO_TCP ) => socket = %i", listen_fd);

    if (err.Fail())
        return rnb_err;

    // enable local address reuse
    SetSocketOption (listen_fd, SOL_SOCKET, SO_REUSEADDR, 1);

    struct sockaddr_in sa;
    ::memset (&sa, 0, sizeof sa);
    sa.sin_len = sizeof sa;
    sa.sin_family = AF_INET;
    sa.sin_port = htons (port);
    sa.sin_addr.s_addr = htonl (INADDR_ANY);

    int error = ::bind (listen_fd, (struct sockaddr *) &sa, sizeof(sa));
    if (error == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::bind ( socket = %i, (struct sockaddr *) &sa, sizeof(sa)) )", listen_fd);

    if (err.Fail())
    {
        ClosePort (listen_fd, false);
        return rnb_err;
    }

    if (callback && port == 0)
    {
        // We were asked to listen on port zero which means we
        // must now read the actual port that was given to us 
        // as port zero is a special code for "find an open port
        // for me".
        socklen_t sa_len = sizeof (sa);
        if (getsockname(listen_fd, (struct sockaddr *)&sa, &sa_len) == 0)
        {
            port = ntohs (sa.sin_port);
            callback (callback_baton, port);
        }
    }

    error = ::listen (listen_fd, 1);
    if (error == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::listen ( socket = %i, backlog = 1 )", listen_fd);

    if (err.Fail())
    {
        ClosePort (listen_fd, false);
        return rnb_err;
    }

    m_fd = ::accept (listen_fd, NULL, 0);
    if (m_fd == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::accept ( socket = %i, address = NULL, address_len = 0 )", listen_fd);

    ClosePort (listen_fd, false);

    if (err.Fail())
    {
        return rnb_err;
    }
    else
    {
        // Keep our TCP packets coming without any delays.
        SetSocketOption (m_fd, IPPROTO_TCP, TCP_NODELAY, 1);
    }

    return rnb_success;
}
コード例 #23
0
rnb_err_t
RNBSocket::Listen (const char *listen_host, uint16_t port, PortBoundCallback callback, const void *callback_baton)
{
    //DNBLogThreadedIf(LOG_RNB_COMM, "%8u RNBSocket::%s called", (uint32_t)m_timer.ElapsedMicroSeconds(true), __FUNCTION__);
    // Disconnect without saving errno
    Disconnect (false);

    // Now figure out the hostname that will be attaching and palce it into
    struct sockaddr_in listen_addr;
    ::memset (&listen_addr, 0, sizeof listen_addr);
    listen_addr.sin_len = sizeof listen_addr;
    listen_addr.sin_family = AF_INET;
    listen_addr.sin_port = htons (port);
    listen_addr.sin_addr.s_addr = INADDR_ANY;
    
    if (!ResolveIPV4HostName(listen_host, listen_addr.sin_addr.s_addr))
    {
        DNBLogThreaded("error: failed to resolve connecting host '%s'", listen_host);
        return rnb_err;
    }
    
    DNBError err;
    int listen_fd = ::socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (listen_fd == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::socket ( domain = AF_INET, type = SOCK_STREAM, protocol = IPPROTO_TCP ) => socket = %i", listen_fd);

    if (err.Fail())
        return rnb_err;

    // enable local address reuse
    SetSocketOption (listen_fd, SOL_SOCKET, SO_REUSEADDR, 1);

    struct sockaddr_in sa;
    ::memset (&sa, 0, sizeof sa);
    sa.sin_len = sizeof sa;
    sa.sin_family = AF_INET;
    sa.sin_port = htons (port);
    sa.sin_addr.s_addr = INADDR_ANY; // Let incoming connections bind to any host network interface (this is NOT who can connect to us)
    int error = ::bind (listen_fd, (struct sockaddr *) &sa, sizeof(sa));
    if (error == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::bind ( socket = %i, (struct sockaddr *) &sa, sizeof(sa)) )", listen_fd);

    if (err.Fail())
    {
        ClosePort (listen_fd, false);
        return rnb_err;
    }

    error = ::listen (listen_fd, 5);
    if (error == -1)
        err.SetError(errno, DNBError::POSIX);

    if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
        err.LogThreaded("::listen ( socket = %i, backlog = 1 )", listen_fd);

    if (err.Fail())
    {
        ClosePort (listen_fd, false);
        return rnb_err;
    }
    
    if (callback)
    {
        // We were asked to listen on port zero which means we
        // must now read the actual port that was given to us
        // as port zero is a special code for "find an open port
        // for me".
        if (port == 0)
        {
            socklen_t sa_len = sizeof (sa);
            if (getsockname(listen_fd, (struct sockaddr *)&sa, &sa_len) == 0)
            {
                port = ntohs (sa.sin_port);
                callback (callback_baton, port);
            }
        }
        else
        {
            callback (callback_baton, port);
        }
    }

    struct sockaddr_in accept_addr;
    ::memset (&accept_addr, 0, sizeof accept_addr);
    accept_addr.sin_len = sizeof accept_addr;

    bool accept_connection = false;

    // Loop until we are happy with our connection
    while (!accept_connection)
    {
        socklen_t accept_addr_len = sizeof accept_addr;
        m_fd = ::accept (listen_fd, (struct sockaddr *)&accept_addr, &accept_addr_len);

        if (m_fd == -1)
            err.SetError(errno, DNBError::POSIX);
        
        if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
            err.LogThreaded("::accept ( socket = %i, address = %p, address_len = %u )", listen_fd, &accept_addr, accept_addr_len);

        if (err.Fail())
            break;

        if (listen_addr.sin_addr.s_addr == INADDR_ANY)
            accept_connection = true;
        else
        {
            if (accept_addr_len == listen_addr.sin_len &&
                accept_addr.sin_addr.s_addr == listen_addr.sin_addr.s_addr)
            {
                accept_connection = true;
            }
            else
            {
                ::close (m_fd);
                m_fd = -1;
                const uint8_t *accept_ip = (const uint8_t *)&accept_addr.sin_addr.s_addr;
                const uint8_t *listen_ip = (const uint8_t *)&listen_addr.sin_addr.s_addr;
                ::fprintf (stderr,
                           "error: rejecting incoming connection from %u.%u.%u.%u (expecting %u.%u.%u.%u)\n",
                           accept_ip[0], accept_ip[1], accept_ip[2], accept_ip[3],
                           listen_ip[0], listen_ip[1], listen_ip[2], listen_ip[3]);
                DNBLogThreaded ("error: rejecting connection from %u.%u.%u.%u (expecting %u.%u.%u.%u)",
                                accept_ip[0], accept_ip[1], accept_ip[2], accept_ip[3],
                                listen_ip[0], listen_ip[1], listen_ip[2], listen_ip[3]);
            }
        }
    }

    ClosePort (listen_fd, false);

    if (err.Fail())
    {
        return rnb_err;
    }
    else
    {
        // Keep our TCP packets coming without any delays.
        SetSocketOption (m_fd, IPPROTO_TCP, TCP_NODELAY, 1);
    }

    return rnb_success;
}
コード例 #24
0
ファイル: MachException.cpp プロジェクト: eightcien/lldb
kern_return_t
MachException::Message::Reply(MachProcess *process, int signal)
{
    // Reply to the exception...
    DNBError err;

    // If we had a soft signal, we need to update the thread first so it can
    // continue without signaling
    int soft_signal = state.SoftSignal();
    if (soft_signal)
    {
        int state_pid = -1;
        if (process->Task().TaskPort() == state.task_port)
        {
            // This is our task, so we can update the signal to send to it
            state_pid = process->ProcessID();
            soft_signal = signal;
        }
        else
        {
            err = ::pid_for_task(state.task_port, &state_pid);
        }

        assert (state_pid != -1);
        if (state_pid != -1)
        {
            errno = 0;
            if (::ptrace (PT_THUPDATE, state_pid, (caddr_t)state.thread_port, soft_signal) != 0)
                err.SetError(errno, DNBError::POSIX);
            else
                err.Clear();

            if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail())
                err.LogThreaded("::ptrace (request = PT_THUPDATE, pid = 0x%4.4x, tid = 0x%4.4x, signal = %i)", state_pid, state.thread_port, soft_signal);
        }
    }

    DNBLogThreadedIf(LOG_EXCEPTIONS, "::mach_msg ( msg->{bits = %#x, size = %u, remote_port = %#x, local_port = %#x, reserved = 0x%x, id = 0x%x}, option = %#x, send_size = %u, rcv_size = %u, rcv_name = %#x, timeout = %u, notify = %#x)",
        reply_msg.hdr.msgh_bits,
        reply_msg.hdr.msgh_size,
        reply_msg.hdr.msgh_remote_port,
        reply_msg.hdr.msgh_local_port,
        reply_msg.hdr.msgh_reserved,
        reply_msg.hdr.msgh_id,
        MACH_SEND_MSG | MACH_SEND_INTERRUPT,
        reply_msg.hdr.msgh_size,
        0,
        MACH_PORT_NULL,
        MACH_MSG_TIMEOUT_NONE,
        MACH_PORT_NULL);

    err = ::mach_msg (  &reply_msg.hdr,
                        MACH_SEND_MSG | MACH_SEND_INTERRUPT,
                        reply_msg.hdr.msgh_size,
                        0,
                        MACH_PORT_NULL,
                        MACH_MSG_TIMEOUT_NONE,
                        MACH_PORT_NULL);

    if (err.Fail())
    {
        if (err.Error() == MACH_SEND_INTERRUPTED)
        {
            if (DNBLogCheckLogBit(LOG_EXCEPTIONS))
                err.LogThreaded("::mach_msg() - send interrupted");
            // TODO: keep retrying to reply???
        }
        else
        {
            if (state.task_port == process->Task().TaskPort())
            {
                if (DNBLogCheckLogBit(LOG_EXCEPTIONS))
                    err.LogThreaded("::mach_msg() - failed (task)");
                abort ();
            }
            else
            {
                if (DNBLogCheckLogBit(LOG_EXCEPTIONS))
                    err.LogThreaded("::mach_msg() - failed (child of task)");
            }
        }
    }

    return err.Error();
}
コード例 #25
0
ファイル: MachTask.cpp プロジェクト: eightcien/lldb
void *
MachTask::ExceptionThread (void *arg)
{
    if (arg == NULL)
        return NULL;

    MachTask *mach_task = (MachTask*) arg;
    MachProcess *mach_proc = mach_task->Process();
    DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s ( arg = %p ) starting thread...", __FUNCTION__, arg);

    // We keep a count of the number of consecutive exceptions received so
    // we know to grab all exceptions without a timeout. We do this to get a
    // bunch of related exceptions on our exception port so we can process
    // then together. When we have multiple threads, we can get an exception
    // per thread and they will come in consecutively. The main loop in this
    // thread can stop periodically if needed to service things related to this
    // process.
    // flag set in the options, so we will wait forever for an exception on
    // our exception port. After we get one exception, we then will use the
    // MACH_RCV_TIMEOUT option with a zero timeout to grab all other current
    // exceptions for our process. After we have received the last pending
    // exception, we will get a timeout which enables us to then notify
    // our main thread that we have an exception bundle avaiable. We then wait
    // for the main thread to tell this exception thread to start trying to get
    // exceptions messages again and we start again with a mach_msg read with
    // infinite timeout.
    uint32_t num_exceptions_received = 0;
    DNBError err;
    task_t task = mach_task->TaskPort();
    mach_msg_timeout_t periodic_timeout = 0;

#if defined (__arm__)
    mach_msg_timeout_t watchdog_elapsed = 0;
    mach_msg_timeout_t watchdog_timeout = 60 * 1000;
    pid_t pid = mach_proc->ProcessID();
    CFReleaser<SBSWatchdogAssertionRef> watchdog;

    if (mach_proc->ProcessUsingSpringBoard())
    {
        // Request a renewal for every 60 seconds if we attached using SpringBoard
        watchdog.reset(::SBSWatchdogAssertionCreateForPID(NULL, pid, 60));
        DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionCreateForPID (NULL, %4.4x, 60 ) => %p", pid, watchdog.get());

        if (watchdog.get())
        {
            ::SBSWatchdogAssertionRenew (watchdog.get());

            CFTimeInterval watchdogRenewalInterval = ::SBSWatchdogAssertionGetRenewalInterval (watchdog.get());
            DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionGetRenewalInterval ( %p ) => %g seconds", watchdog.get(), watchdogRenewalInterval);
            if (watchdogRenewalInterval > 0.0)
            {
                watchdog_timeout = (mach_msg_timeout_t)watchdogRenewalInterval * 1000;
                if (watchdog_timeout > 3000)
                    watchdog_timeout -= 1000;   // Give us a second to renew our timeout
                else if (watchdog_timeout > 1000)
                    watchdog_timeout -= 250;    // Give us a quarter of a second to renew our timeout
            }
        }
        if (periodic_timeout == 0 || periodic_timeout > watchdog_timeout)
            periodic_timeout = watchdog_timeout;
    }
#endif  // #if defined (__arm__)

    while (mach_task->ExceptionPortIsValid())
    {
        ::pthread_testcancel ();

        MachException::Message exception_message;


        if (num_exceptions_received > 0)
        {
            // No timeout, just receive as many exceptions as we can since we already have one and we want
            // to get all currently available exceptions for this task
            err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT | MACH_RCV_TIMEOUT, 0);
        }
        else if (periodic_timeout > 0)
        {
            // We need to stop periodically in this loop, so try and get a mach message with a valid timeout (ms)
            err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT | MACH_RCV_TIMEOUT, periodic_timeout);
        }
        else
        {
            // We don't need to parse all current exceptions or stop periodically,
            // just wait for an exception forever.
            err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0);
        }

        if (err.Error() == MACH_RCV_INTERRUPTED)
        {
            // If we have no task port we should exit this thread
            if (!mach_task->ExceptionPortIsValid())
            {
                DNBLogThreadedIf(LOG_EXCEPTIONS, "thread cancelled...");
                break;
            }

            // Make sure our task is still valid
            if (MachTask::IsValid(task))
            {
                // Task is still ok
                DNBLogThreadedIf(LOG_EXCEPTIONS, "interrupted, but task still valid, continuing...");
                continue;
            }
            else
            {
                DNBLogThreadedIf(LOG_EXCEPTIONS, "task has exited...");
                mach_proc->SetState(eStateExited);
                // Our task has died, exit the thread.
                break;
            }
        }
        else if (err.Error() == MACH_RCV_TIMED_OUT)
        {
            if (num_exceptions_received > 0)
            {
                // We were receiving all current exceptions with a timeout of zero
                // it is time to go back to our normal looping mode
                num_exceptions_received = 0;

                // Notify our main thread we have a complete exception message
                // bundle available.
                mach_proc->ExceptionMessageBundleComplete();

                // in case we use a timeout value when getting exceptions...
                // Make sure our task is still valid
                if (MachTask::IsValid(task))
                {
                    // Task is still ok
                    DNBLogThreadedIf(LOG_EXCEPTIONS, "got a timeout, continuing...");
                    continue;
                }
                else
                {
                    DNBLogThreadedIf(LOG_EXCEPTIONS, "task has exited...");
                    mach_proc->SetState(eStateExited);
                    // Our task has died, exit the thread.
                    break;
                }
                continue;
            }

#if defined (__arm__)
            if (watchdog.get())
            {
                watchdog_elapsed += periodic_timeout;
                if (watchdog_elapsed >= watchdog_timeout)
                {
                    DNBLogThreadedIf(LOG_TASK, "SBSWatchdogAssertionRenew ( %p )", watchdog.get());
                    ::SBSWatchdogAssertionRenew (watchdog.get());
                    watchdog_elapsed = 0;
                }
            }
#endif
        }
        else if (err.Error() != KERN_SUCCESS)
        {
            DNBLogThreadedIf(LOG_EXCEPTIONS, "got some other error, do something about it??? nah, continuing for now...");
            // TODO: notify of error?
        }
        else
        {
            if (exception_message.CatchExceptionRaise())
            {
                ++num_exceptions_received;
                mach_proc->ExceptionMessageReceived(exception_message);
            }
        }
    }

#if defined (__arm__)
    if (watchdog.get())
    {
        // TODO: change SBSWatchdogAssertionRelease to SBSWatchdogAssertionCancel when we
        // all are up and running on systems that support it. The SBS framework has a #define
        // that will forward SBSWatchdogAssertionRelease to SBSWatchdogAssertionCancel for now
        // so it should still build either way.
        DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionRelease(%p)", watchdog.get());
        ::SBSWatchdogAssertionRelease (watchdog.get());
    }
#endif  // #if defined (__arm__)

    DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s (%p): thread exiting...", __FUNCTION__, arg);
    return NULL;
}