bool
IsSBProcess (nub_process_t pid)
{
#ifdef WITH_SPRINGBOARD
bool opt_runningApps = true;
bool opt_debuggable = false;
CFReleaser<CFArrayRef> sbsAppIDs (::SBSCopyApplicationDisplayIdentifiers (opt_runningApps, opt_debuggable));
if (sbsAppIDs.get() != NULL)
{
CFIndex count = ::CFArrayGetCount (sbsAppIDs.get());
CFIndex i = 0;
for (i = 0; i < count; i++)
{
CFStringRef displayIdentifier = (CFStringRef)::CFArrayGetValueAtIndex (sbsAppIDs.get(), i);
// Get the process id for the app (if there is one)
pid_t sbs_pid = INVALID_NUB_PROCESS;
if (::SBSProcessIDForDisplayIdentifier ((CFStringRef)displayIdentifier, &sbs_pid) == TRUE)
{
if (sbs_pid == pid)
return true;
}
}
}
#endif
return false;
}
bool
IsSBProcess (nub_process_t pid)
{
#ifdef WITH_SPRINGBOARD
CFReleaser<CFArrayRef> appIdsForPID (::SBSCopyDisplayIdentifiersForProcessID(pid));
return appIdsForPID.get() != NULL;
#else
return false;
#endif
}
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;
}
int
ListApplications(std::string& plist, bool opt_runningApps, bool opt_debuggable)
{
#ifdef WITH_SPRINGBOARD
int result = -1;
CFAllocatorRef alloc = kCFAllocatorDefault;
// Create a mutable array that we can populate. Specify zero so it can be of any size.
CFReleaser<CFMutableArrayRef> plistMutableArray (::CFArrayCreateMutable (alloc, 0, &kCFTypeArrayCallBacks));
CFReleaser<CFStringRef> sbsFrontAppID (::SBSCopyFrontmostApplicationDisplayIdentifier ());
CFReleaser<CFArrayRef> sbsAppIDs (::SBSCopyApplicationDisplayIdentifiers (opt_runningApps, opt_debuggable));
// Need to check the return value from SBSCopyApplicationDisplayIdentifiers.
CFIndex count = sbsAppIDs.get() ? ::CFArrayGetCount (sbsAppIDs.get()) : 0;
CFIndex i = 0;
for (i = 0; i < count; i++)
{
CFStringRef displayIdentifier = (CFStringRef)::CFArrayGetValueAtIndex (sbsAppIDs.get(), i);
// Create a new mutable dictionary for each application
CFReleaser<CFMutableDictionaryRef> appInfoDict (::CFDictionaryCreateMutable (alloc, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
// Get the process id for the app (if there is one)
pid_t pid = INVALID_NUB_PROCESS;
if (::SBSProcessIDForDisplayIdentifier ((CFStringRef)displayIdentifier, &pid) == true)
{
CFReleaser<CFNumberRef> pidCFNumber (::CFNumberCreate (alloc, kCFNumberSInt32Type, &pid));
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_PID_KEY, pidCFNumber.get());
}
// Set the a boolean to indicate if this is the front most
if (sbsFrontAppID.get() && displayIdentifier && (::CFStringCompare (sbsFrontAppID.get(), displayIdentifier, 0) == kCFCompareEqualTo))
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_FRONTMOST_KEY, kCFBooleanTrue);
else
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_FRONTMOST_KEY, kCFBooleanFalse);
CFReleaser<CFStringRef> executablePath (::SBSCopyExecutablePathForDisplayIdentifier (displayIdentifier));
if (executablePath.get() != NULL)
{
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_PATH_KEY, executablePath.get());
}
CFReleaser<CFStringRef> iconImagePath (::SBSCopyIconImagePathForDisplayIdentifier (displayIdentifier)) ;
if (iconImagePath.get() != NULL)
{
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_ICON_PATH_KEY, iconImagePath.get());
}
CFReleaser<CFStringRef> localizedDisplayName (::SBSCopyLocalizedApplicationNameForDisplayIdentifier (displayIdentifier));
if (localizedDisplayName.get() != NULL)
{
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_DISPLAY_NAME_KEY, localizedDisplayName.get());
}
// Append the application info to the plist array
::CFArrayAppendValue (plistMutableArray.get(), appInfoDict.get());
}
CFReleaser<CFDataRef> plistData (::CFPropertyListCreateXMLData (alloc, plistMutableArray.get()));
// write plist to service port
if (plistData.get() != NULL)
{
CFIndex size = ::CFDataGetLength (plistData.get());
const UInt8 *bytes = ::CFDataGetBytePtr (plistData.get());
if (bytes != NULL && size > 0)
{
plist.assign((char *)bytes, size);
return 0; // Success
}
else
{
DNBLogError("empty application property list.");
result = -2;
}
}
else
{
DNBLogError("serializing task list.");
result = -3;
}
return result;
#else
// TODO: list all current processes
DNBLogError("SBS doesn't support getting application list.");
return -1;
#endif
}
int
GetProcesses (CFMutableArrayRef plistMutableArray, bool all_users)
{
if (plistMutableArray == NULL)
return -1;
// Running as root, get all processes
std::vector<struct kinfo_proc> proc_infos;
const size_t num_proc_infos = GetAllInfos(proc_infos);
if (num_proc_infos > 0)
{
const pid_t our_pid = getpid();
const uid_t our_uid = getuid();
uint32_t i;
CFAllocatorRef alloc = kCFAllocatorDefault;
for (i=0; i<num_proc_infos; i++)
{
struct kinfo_proc &proc_info = proc_infos[i];
bool kinfo_user_matches;
// Special case, if lldb is being run as root we can attach to anything.
if (all_users)
kinfo_user_matches = true;
else
kinfo_user_matches = proc_info.kp_eproc.e_pcred.p_ruid == our_uid;
const pid_t pid = proc_info.kp_proc.p_pid;
// Skip zombie processes and processes with unset status
if (kinfo_user_matches == false || // User is acceptable
pid == our_pid || // Skip this process
pid == 0 || // Skip kernel (kernel pid is zero)
proc_info.kp_proc.p_stat == SZOMB || // Zombies are bad, they like brains...
proc_info.kp_proc.p_flag & P_TRACED || // Being debugged?
proc_info.kp_proc.p_flag & P_WEXIT || // Working on exiting?
proc_info.kp_proc.p_flag & P_TRANSLATED) // Skip translated ppc (Rosetta)
continue;
// Create a new mutable dictionary for each application
CFReleaser<CFMutableDictionaryRef> appInfoDict (::CFDictionaryCreateMutable (alloc, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
// Get the process id for the app (if there is one)
const int32_t pid_int32 = pid;
CFReleaser<CFNumberRef> pidCFNumber (::CFNumberCreate (alloc, kCFNumberSInt32Type, &pid_int32));
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_PID_KEY, pidCFNumber.get());
// Set the a boolean to indicate if this is the front most
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_FRONTMOST_KEY, kCFBooleanFalse);
const char *pid_basename = proc_info.kp_proc.p_comm;
char proc_path_buf[PATH_MAX];
int return_val = proc_pidpath (pid, proc_path_buf, PATH_MAX);
if (return_val > 0)
{
// Okay, now search backwards from that to see if there is a
// slash in the name. Note, even though we got all the args we don't care
// because the list data is just a bunch of concatenated null terminated strings
// so strrchr will start from the end of argv0.
pid_basename = strrchr(proc_path_buf, '/');
if (pid_basename)
{
// Skip the '/'
++pid_basename;
}
else
{
// We didn't find a directory delimiter in the process argv[0], just use what was in there
pid_basename = proc_path_buf;
}
CFString cf_pid_path (proc_path_buf);
if (cf_pid_path.get())
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_PATH_KEY, cf_pid_path.get());
}
if (pid_basename && pid_basename[0])
{
CFString pid_name (pid_basename);
::CFDictionarySetValue (appInfoDict.get(), DTSERVICES_APP_DISPLAY_NAME_KEY, pid_name.get());
}
// Append the application info to the plist array
::CFArrayAppendValue (plistMutableArray, appInfoDict.get());
}
}
return 0;
}
