Add code to support thread debugging.

1. Add global varible _libkse_debug, debugger uses the varible to identify
   libpthread. when the varible is written to non-zero by debugger, libpthread
   will take some special action at context switch time, it will check
   TMDF_DOTRUNUSER flags, if a thread has the flags set by debugger, it won't
   be scheduled, when a thread leaves KSE critical region, thread checks
   the flag, if it was set, the thread relinquish CPU.

2. Add pq_first_debug to select a thread allowd to run by debugger.

3. Some names prefixed with _thr are renamed to _thread prefix.

which is allowed to run by debugger.

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/libpthread/thread/thr_exit.c b/lib/libpthread/thread/thr_exit.c
index 416709a..22aa875 100644
--- a/lib/libpthread/thread/thr_exit.c
+++ b/lib/libpthread/thread/thr_exit.c
@@ -125,11 +125,11 @@ _pthread_exit(void *status)
 	curkse = _get_curkse();
 	KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
 	/* Use thread_list_lock */
-	_thr_active_threads--;
+	_thread_active_threads--;
 #ifdef SYSTEM_SCOPE_ONLY
-	if (_thr_active_threads == 0) {
+	if (_thread_active_threads == 0) {
 #else
-	if (_thr_active_threads == 1) {
+	if (_thread_active_threads == 1) {
 #endif
 		KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
 		_kse_critical_leave(crit);