Add hacky, incomplete Linux host implementation; barely enough to allow
compiling lldb. Someone else might try to improve it, though. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@107501 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Host/linux/Host.cpp b/source/Host/linux/Host.cpp
new file mode 100644
index 0000000..c4bf53f
--- /dev/null
+++ b/source/Host/linux/Host.cpp
@@ -0,0 +1,763 @@
+//===-- Host.mm -------------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <dlfcn.h>
+#include <libgen.h>
+#include <signal.h>
+#include <stddef.h>
+#include <sys/sysctl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <map>
+#include <string>
+
+#include "lldb/Host/Host.h"
+#include "lldb/Core/ArchSpec.h"
+#include "lldb/Core/ConstString.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Core/FileSpec.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/StreamString.h"
+#include "lldb/Host/Mutex.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/TargetList.h"
+#include "lldb/lldb-private-log.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+//------------------------------------------------------------------
+// Return the size in bytes of a page on the host system
+//------------------------------------------------------------------
+size_t
+Host::GetPageSize()
+{
+ return ::getpagesize();
+}
+
+
+//------------------------------------------------------------------
+// Returns true if the host system is Big Endian.
+//------------------------------------------------------------------
+ByteOrder
+Host::GetByteOrder()
+{
+ union EndianTest
+ {
+ uint32_t num;
+ uint8_t bytes[sizeof(uint32_t)];
+ } endian = { (uint16_t)0x11223344 };
+ switch (endian.bytes[0])
+ {
+ case 0x11: return eByteOrderLittle;
+ case 0x44: return eByteOrderBig;
+ case 0x33: return eByteOrderPDP;
+ }
+ return eByteOrderInvalid;
+}
+
+lldb::pid_t
+Host::GetCurrentProcessID()
+{
+ return ::getpid();
+}
+
+lldb::pid_t
+Host::GetCurrentThreadID()
+{
+ return pthread_self();
+}
+
+
+const ArchSpec &
+Host::GetArchitecture ()
+{
+ static ArchSpec g_host_arch;
+#if 0
+ if (!g_host_arch.IsValid())
+ {
+ uint32_t cputype, cpusubtype;
+ uint32_t is_64_bit_capable;
+ size_t len = sizeof(cputype);
+ if (::sysctlbyname("hw.cputype", &cputype, &len, NULL, 0) == 0)
+ {
+ len = sizeof(cpusubtype);
+ if (::sysctlbyname("hw.cpusubtype", &cpusubtype, &len, NULL, 0) == 0)
+ g_host_arch.SetArch(cputype, cpusubtype);
+
+ len = sizeof (is_64_bit_capable);
+ if (::sysctlbyname("hw.cpu64bit_capable", &is_64_bit_capable, &len, NULL, 0) == 0)
+ {
+ if (is_64_bit_capable)
+ {
+ if (cputype == CPU_TYPE_I386 && cpusubtype == CPU_SUBTYPE_486)
+ cpusubtype = CPU_SUBTYPE_I386_ALL;
+
+ cputype |= CPU_ARCH_ABI64;
+ }
+ }
+ }
+ }
+#else
+ g_host_arch.SetArch(7u, 144u);
+#endif
+ return g_host_arch;
+}
+
+const ConstString &
+Host::GetVendorString()
+{
+ static ConstString g_vendor;
+ if (!g_vendor)
+ {
+#if 0
+ char ostype[64];
+ size_t len = sizeof(ostype);
+ if (::sysctlbyname("kern.ostype", &ostype, &len, NULL, 0) == 0)
+ g_vendor.SetCString (ostype);
+#else
+ g_vendor.SetCString("gnu");
+#endif
+ }
+ return g_vendor;
+}
+
+const ConstString &
+Host::GetOSString()
+{
+ static ConstString g_os_string("linux");
+ return g_os_string;
+}
+
+const ConstString &
+Host::GetTargetTriple()
+{
+ static ConstString g_host_triple;
+ if (!(g_host_triple))
+ {
+ StreamString triple;
+ triple.Printf("%s-%s-%s",
+ GetArchitecture ().AsCString(),
+ GetVendorString().AsCString("apple"),
+ GetOSString().AsCString("darwin"));
+
+ std::transform (triple.GetString().begin(),
+ triple.GetString().end(),
+ triple.GetString().begin(),
+ ::tolower);
+
+ g_host_triple.SetCString(triple.GetString().c_str());
+ }
+ return g_host_triple;
+}
+
+static pthread_once_t g_thread_create_once = PTHREAD_ONCE_INIT;
+static pthread_key_t g_thread_create_key = 0;
+
+static void
+InitThreadCreated()
+{
+ ::pthread_key_create (&g_thread_create_key, 0);
+}
+
+struct HostThreadCreateInfo
+{
+ std::string thread_name;
+ thread_func_t thread_fptr;
+ thread_arg_t thread_arg;
+
+ HostThreadCreateInfo (const char *name, thread_func_t fptr, thread_arg_t arg) :
+ thread_name (name ? name : ""),
+ thread_fptr (fptr),
+ thread_arg (arg)
+ {
+ }
+};
+
+static thread_result_t
+ThreadCreateTrampoline (thread_arg_t arg)
+{
+ HostThreadCreateInfo *info = (HostThreadCreateInfo *)arg;
+ Host::ThreadCreated (info->thread_name.c_str());
+ thread_func_t thread_fptr = info->thread_fptr;
+ thread_arg_t thread_arg = info->thread_arg;
+
+ Log * log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD);
+ if (log)
+ log->Printf("thread created");
+
+ delete info;
+ return thread_fptr (thread_arg);
+}
+
+lldb::thread_t
+Host::ThreadCreate
+(
+ const char *thread_name,
+ thread_func_t thread_fptr,
+ thread_arg_t thread_arg,
+ Error *error
+)
+{
+ lldb::thread_t thread = LLDB_INVALID_HOST_THREAD;
+
+ // Host::ThreadCreateTrampoline will delete this pointer for us.
+ HostThreadCreateInfo *info_ptr = new HostThreadCreateInfo (thread_name, thread_fptr, thread_arg);
+
+ int err = ::pthread_create (&thread, NULL, ThreadCreateTrampoline, info_ptr);
+ if (err == 0)
+ {
+ if (error)
+ error->Clear();
+ return thread;
+ }
+
+ if (error)
+ error->SetError (err, eErrorTypePOSIX);
+
+ return LLDB_INVALID_HOST_THREAD;
+}
+
+bool
+Host::ThreadCancel (lldb::thread_t thread, Error *error)
+{
+
+ int err = ::pthread_cancel (thread);
+ if (error)
+ error->SetError(err, eErrorTypePOSIX);
+ return err == 0;
+}
+
+bool
+Host::ThreadDetach (lldb::thread_t thread, Error *error)
+{
+ int err = ::pthread_detach (thread);
+ if (error)
+ error->SetError(err, eErrorTypePOSIX);
+ return err == 0;
+}
+
+bool
+Host::ThreadJoin (lldb::thread_t thread, thread_result_t *thread_result_ptr, Error *error)
+{
+ int err = ::pthread_join (thread, thread_result_ptr);
+ if (error)
+ error->SetError(err, eErrorTypePOSIX);
+ return err == 0;
+}
+
+void
+Host::ThreadCreated (const char *thread_name)
+{
+ ::pthread_once (&g_thread_create_once, InitThreadCreated);
+ if (g_thread_create_key)
+ {
+ //::pthread_setspecific (g_thread_create_key, new MacOSXDarwinThread(thread_name));
+ }
+}
+
+//------------------------------------------------------------------
+// Control access to a static file thread name map using a single
+// static function to avoid a static constructor.
+//------------------------------------------------------------------
+static const char *
+ThreadNameAccessor (bool get, lldb::pid_t pid, lldb::tid_t tid, const char *name)
+{
+
+ uint64_t pid_tid = ((uint64_t)pid << 32) | (uint64_t)tid;
+
+ static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
+ Mutex::Locker locker(&g_mutex);
+
+ typedef std::map<uint64_t, std::string> thread_name_map;
+ static thread_name_map g_thread_names;
+
+ if (get)
+ {
+ // See if the thread name exists in our thread name pool
+ thread_name_map::iterator pos = g_thread_names.find(pid_tid);
+ if (pos != g_thread_names.end())
+ return pos->second.c_str();
+ }
+ else
+ {
+ // Set the thread name
+ g_thread_names[pid_tid] = name;
+ }
+ return NULL;
+}
+
+
+
+const char *
+Host::GetSignalAsCString (int signo)
+{
+ switch (signo)
+ {
+ case SIGHUP: return "SIGHUP"; // 1 hangup
+ case SIGINT: return "SIGINT"; // 2 interrupt
+ case SIGQUIT: return "SIGQUIT"; // 3 quit
+ case SIGILL: return "SIGILL"; // 4 illegal instruction (not reset when caught)
+ case SIGTRAP: return "SIGTRAP"; // 5 trace trap (not reset when caught)
+ case SIGABRT: return "SIGABRT"; // 6 abort()
+#if defined(_POSIX_C_SOURCE)
+ case SIGPOLL: return "SIGPOLL"; // 7 pollable event ([XSR] generated, not supported)
+#else // !_POSIX_C_SOURCE
+ case SIGEMT: return "SIGEMT"; // 7 EMT instruction
+#endif // !_POSIX_C_SOURCE
+ case SIGFPE: return "SIGFPE"; // 8 floating point exception
+ case SIGKILL: return "SIGKILL"; // 9 kill (cannot be caught or ignored)
+ case SIGBUS: return "SIGBUS"; // 10 bus error
+ case SIGSEGV: return "SIGSEGV"; // 11 segmentation violation
+ case SIGSYS: return "SIGSYS"; // 12 bad argument to system call
+ case SIGPIPE: return "SIGPIPE"; // 13 write on a pipe with no one to read it
+ case SIGALRM: return "SIGALRM"; // 14 alarm clock
+ case SIGTERM: return "SIGTERM"; // 15 software termination signal from kill
+ case SIGURG: return "SIGURG"; // 16 urgent condition on IO channel
+ case SIGSTOP: return "SIGSTOP"; // 17 sendable stop signal not from tty
+ case SIGTSTP: return "SIGTSTP"; // 18 stop signal from tty
+ case SIGCONT: return "SIGCONT"; // 19 continue a stopped process
+ case SIGCHLD: return "SIGCHLD"; // 20 to parent on child stop or exit
+ case SIGTTIN: return "SIGTTIN"; // 21 to readers pgrp upon background tty read
+ case SIGTTOU: return "SIGTTOU"; // 22 like TTIN for output if (tp->t_local<OSTOP)
+#if !defined(_POSIX_C_SOURCE)
+ case SIGIO: return "SIGIO"; // 23 input/output possible signal
+#endif
+ case SIGXCPU: return "SIGXCPU"; // 24 exceeded CPU time limit
+ case SIGXFSZ: return "SIGXFSZ"; // 25 exceeded file size limit
+ case SIGVTALRM: return "SIGVTALRM"; // 26 virtual time alarm
+ case SIGPROF: return "SIGPROF"; // 27 profiling time alarm
+#if !defined(_POSIX_C_SOURCE)
+ case SIGWINCH: return "SIGWINCH"; // 28 window size changes
+ case SIGINFO: return "SIGINFO"; // 29 information request
+#endif
+ case SIGUSR1: return "SIGUSR1"; // 30 user defined signal 1
+ case SIGUSR2: return "SIGUSR2"; // 31 user defined signal 2
+ default:
+ break;
+ }
+ return NULL;
+}
+
+const char *
+Host::GetThreadName (lldb::pid_t pid, lldb::tid_t tid)
+{
+ const char *name = ThreadNameAccessor (true, pid, tid, NULL);
+ if (name == NULL)
+ {
+ // We currently can only get the name of a thread in the current process.
+#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
+ if (pid == Host::GetCurrentProcessID())
+ {
+ char pthread_name[1024];
+ if (::pthread_getname_np (::pthread_from_mach_thread_np (tid), pthread_name, sizeof(pthread_name)) == 0)
+ {
+ if (pthread_name[0])
+ {
+ // Set the thread in our string pool
+ ThreadNameAccessor (false, pid, tid, pthread_name);
+ // Get our copy of the thread name string
+ name = ThreadNameAccessor (true, pid, tid, NULL);
+ }
+ }
+ }
+#endif
+ }
+ return name;
+}
+
+void
+Host::SetThreadName (lldb::pid_t pid, lldb::tid_t tid, const char *name)
+{
+ lldb::pid_t curr_pid = Host::GetCurrentProcessID();
+ lldb::tid_t curr_tid = Host::GetCurrentThreadID();
+ if (pid == LLDB_INVALID_PROCESS_ID)
+ pid = curr_pid;
+
+ if (tid == LLDB_INVALID_THREAD_ID)
+ tid = curr_tid;
+
+#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
+ // Set the pthread name if possible
+ if (pid == curr_pid && tid == curr_tid)
+ {
+ ::pthread_setname_np (name) == 0;
+ }
+#endif
+ ThreadNameAccessor (false, pid, tid, name);
+}
+
+FileSpec
+Host::GetProgramFileSpec ()
+{
+ static FileSpec g_program_filepsec;
+ if (!g_program_filepsec)
+ {
+#if 0
+ std::string program_fullpath;
+ program_fullpath.resize (PATH_MAX);
+ // If DST is NULL, then return the number of bytes needed.
+ uint32_t len = program_fullpath.size();
+ int err = _NSGetExecutablePath ((char *)program_fullpath.data(), &len);
+ if (err < 0)
+ {
+ // The path didn't fit in the buffer provided, increase its size
+ // and try again
+ program_fullpath.resize(len);
+ len = program_fullpath.size();
+ err = _NSGetExecutablePath ((char *)program_fullpath.data(), &len);
+ }
+ if (err == 0)
+ g_program_filepsec.SetFile(program_fullpath.data());
+#endif
+ }
+ return g_program_filepsec;
+}
+
+
+FileSpec
+Host::GetModuleFileSpecForHostAddress (const void *host_addr)
+{
+ FileSpec module_filespec;
+ Dl_info info;
+ if (::dladdr (host_addr, &info))
+ {
+ if (info.dli_fname)
+ module_filespec.SetFile(info.dli_fname);
+ }
+ return module_filespec;
+}
+
+
+bool
+Host::ResolveExecutableInBundle (FileSpec *file)
+{
+#if 0
+ if (file->GetFileType () == FileSpec::eFileTypeDirectory)
+ {
+ char path[PATH_MAX];
+ if (file->GetPath(path, sizeof(path)))
+ {
+ CFCBundle bundle (path);
+ CFCReleaser<CFURLRef> url(bundle.CopyExecutableURL ());
+ if (url.get())
+ {
+ if (::CFURLGetFileSystemRepresentation (url.get(), YES, (UInt8*)path, sizeof(path)))
+ {
+ file->SetFile(path);
+ return true;
+ }
+ }
+ }
+ }
+#endif
+ return false;
+}
+
+struct MonitorInfo
+{
+ int handle;
+ pthread_t thread;
+ Host::MonitorChildProcessCallback callback;
+ void *callback_baton;
+ bool monitor_signals;
+};
+
+typedef std::multimap<lldb::pid_t, MonitorInfo> MonitorInfoMap;
+static pthread_mutex_t g_monitor_map_mutex = PTHREAD_MUTEX_INITIALIZER;
+typedef lldb::SharedPtr<MonitorInfoMap>::Type MonitorInfoMapSP;
+
+static MonitorInfoMapSP&
+GetMonitorMap (bool can_create)
+{
+ static MonitorInfoMapSP g_monitor_map_sp;
+ if (can_create && g_monitor_map_sp.get() == NULL)
+ {
+ g_monitor_map_sp.reset (new MonitorInfoMap);
+ }
+ return g_monitor_map_sp;
+}
+
+static Predicate<bool>&
+GetChildProcessPredicate ()
+{
+ static Predicate<bool> g_has_child_processes;
+ return g_has_child_processes;
+}
+
+static void *
+MonitorChildProcessThreadFunction (void *arg);
+
+static pthread_t g_monitor_thread;
+
+uint32_t
+Host::StartMonitoringChildProcess
+(
+ MonitorChildProcessCallback callback,
+ void *callback_baton,
+ lldb::pid_t pid,
+ bool monitor_signals
+)
+{
+ static uint32_t g_handle = 0;
+ if (callback)
+ {
+ Mutex::Locker locker(&g_monitor_map_mutex);
+ if (!g_monitor_thread)
+ {
+ ::pid_t wait_pid = -1;
+ g_monitor_thread = ThreadCreate ("<lldb.host.wait4>",
+ MonitorChildProcessThreadFunction,
+ &wait_pid,
+ NULL);
+ if (g_monitor_thread)
+ {
+ //Host::ThreadDetach (g_monitor_thread, NULL);
+ }
+ }
+
+ if (g_monitor_thread)
+ {
+ MonitorInfo info = { ++g_handle, 0, callback, callback_baton, monitor_signals };
+ MonitorInfoMapSP monitor_map_sp (GetMonitorMap (true));
+ if (monitor_map_sp)
+ {
+ monitor_map_sp->insert(std::make_pair(pid, info));
+ GetChildProcessPredicate ().SetValue (true, eBroadcastOnChange);
+ return info.handle;
+ }
+ }
+ }
+ return 0;
+}
+
+bool
+Host::StopMonitoringChildProcess (uint32_t handle)
+{
+ Mutex::Locker locker(&g_monitor_map_mutex);
+ MonitorInfoMapSP monitor_map_sp (GetMonitorMap (false));
+ if (monitor_map_sp)
+ {
+ MonitorInfoMap::iterator pos, end = monitor_map_sp->end();
+ for (pos = monitor_map_sp->end(); pos != end; ++pos)
+ {
+ if (pos->second.handle == handle)
+ {
+ monitor_map_sp->erase(pos);
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+
+//------------------------------------------------------------------
+// Scoped class that will disable thread canceling when it is
+// constructed, and exception safely restore the previous value it
+// when it goes out of scope.
+//------------------------------------------------------------------
+class ScopedPThreadCancelDisabler
+{
+public:
+
+ ScopedPThreadCancelDisabler()
+ {
+ // Disable the ability for this thread to be cancelled
+ int err = ::pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &m_old_state);
+ if (err != 0)
+ m_old_state = -1;
+
+ }
+
+ ~ScopedPThreadCancelDisabler()
+ {
+ // Restore the ability for this thread to be cancelled to what it
+ // previously was.
+ if (m_old_state != -1)
+ ::pthread_setcancelstate (m_old_state, 0);
+ }
+private:
+ int m_old_state; // Save the old cancelability state.
+};
+
+
+
+static void *
+MonitorChildProcessThreadFunction (void *arg)
+{
+ Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
+ const char *function = __FUNCTION__;
+ if (log)
+ log->Printf ("%s (arg = %p) thread starting...", function, arg);
+
+ const ::pid_t wait_pid = -1;//*((pid_t*)arg);
+ int status = -1;
+ const int options = 0;
+ struct rusage *rusage = NULL;
+ while (1)
+ {
+ if (log)
+ log->Printf("%s ::wait4 (pid = %i, &status, options = %i, rusage = %p)...", function, wait_pid, options, rusage);
+
+ // Wait for all child processes
+ ::pthread_testcancel ();
+ lldb::pid_t pid = ::wait4 (wait_pid, &status, options, rusage);
+ ::pthread_testcancel ();
+
+ if (pid < 0)
+ {
+ // No child processes to watch wait for the mutex to be cleared
+
+ // Scope for "locker"
+ {
+ ScopedPThreadCancelDisabler pthread_cancel_disabler;
+
+ // First clear out all monitor entries since we have no processes
+ // to watch.
+ Mutex::Locker locker(&g_monitor_map_mutex);
+ // Since we don't have any child processes, we can safely clear
+ // anyone with a valid pid.
+ MonitorInfoMapSP monitor_map_sp(GetMonitorMap (false));
+ if (monitor_map_sp)
+ {
+ MonitorInfoMap::iterator pos = monitor_map_sp->begin();
+ while (pos != monitor_map_sp->end())
+ {
+ // pid value of 0 and -1 are special (see man page on wait4...)
+ if (pos->first > 0)
+ {
+ MonitorInfoMap::iterator next_pos = pos; ++next_pos;
+ monitor_map_sp->erase (pos, next_pos);
+ pos = next_pos;
+ }
+ else
+ ++pos;
+ }
+ }
+ }
+
+ if (log)
+ log->Printf("%s no child processes, wait for some...", function);
+ GetChildProcessPredicate ().SetValue (false, eBroadcastNever);
+ ::pthread_testcancel();
+ GetChildProcessPredicate ().WaitForValueEqualTo (true);
+ if (log)
+ log->Printf("%s resuming monitoring of child processes.", function);
+
+ }
+ else
+ {
+ ScopedPThreadCancelDisabler pthread_cancel_disabler;
+ bool exited = false;
+ int signal = 0;
+ int exit_status = 0;
+ const char *status_cstr = NULL;
+ if (WIFSTOPPED(status))
+ {
+ signal = WSTOPSIG(status);
+ status_cstr = "STOPPED";
+ }
+ else if (WIFEXITED(status))
+ {
+ exit_status = WEXITSTATUS(status);
+ status_cstr = "EXITED";
+ exited = true;
+ }
+ else if (WIFSIGNALED(status))
+ {
+ signal = WTERMSIG(status);
+ status_cstr = "SIGNALED";
+ exited = true;
+ exit_status = -1;
+ }
+ else
+ {
+ status_cstr = "(???"")";
+ }
+
+ if (log)
+ log->Printf ("%s ::wait4 (pid = %i, &status, options = %i, rusage = %p) => pid = %i, status = 0x%8.8x (%s), signal = %i, exit_state = %i",
+ function,
+ wait_pid,
+ options,
+ rusage,
+ pid,
+ status,
+ status_cstr,
+ signal,
+ exit_status);
+
+ // Scope for mutex locker
+ {
+ // Notify anyone listening to this process
+ Mutex::Locker locker(&g_monitor_map_mutex);
+ MonitorInfoMapSP monitor_map_sp(GetMonitorMap (false));
+ if (monitor_map_sp)
+ {
+ std::pair<MonitorInfoMap::iterator, MonitorInfoMap::iterator> range;
+ range = monitor_map_sp->equal_range(pid);
+ MonitorInfoMap::iterator pos;
+ for (pos = range.first; pos != range.second; ++pos)
+ {
+ if (exited || (signal != 0 && pos->second.monitor_signals))
+ {
+ bool callback_return = pos->second.callback (pos->second.callback_baton, pid, signal, exit_status);
+
+ if (exited || callback_return)
+ {
+ // Make this entry as needing to be removed by
+ // setting its handle to zero
+ pos->second.handle = 0;
+ }
+ }
+ }
+
+ // Remove any entries that requested to be removed or any
+ // entries for child processes that did exit. We know this
+ // because we changed the handles to an invalid value.
+ pos = monitor_map_sp->begin();
+ while (pos != monitor_map_sp->end())
+ {
+ if (pos->second.handle == 0)
+ {
+ MonitorInfoMap::iterator next_pos = pos; ++next_pos;
+ monitor_map_sp->erase (pos, next_pos);
+ pos = next_pos;
+ }
+ else
+ ++pos;
+ }
+ }
+ }
+ }
+ }
+
+ if (log)
+ log->Printf ("ProcessMacOSX::%s (arg = %p) thread exiting...", __FUNCTION__, arg);
+
+ g_monitor_thread = NULL;
+ return NULL;
+}
+
+void
+Host::WillTerminate ()
+{
+ if (g_monitor_thread != NULL)
+ {
+ ThreadCancel (g_monitor_thread, NULL);
+ GetChildProcessPredicate ().SetValue (true, eBroadcastAlways);
+ ThreadJoin(g_monitor_thread, NULL, NULL);
+ g_monitor_thread = NULL;
+ }
+}
+