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1999-11-02  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/i386/sys/procfs.h: Include sys/ucontext.h
	instead of duplicating definitions.
This commit is contained in:
Ulrich Drepper
1999-11-02 23:44:42 +00:00
parent 03fc7ab6ed
commit a9cb398f7b
21 changed files with 395 additions and 52 deletions
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95
linuxthreads/manager.c
View File

@@ -43,14 +43,17 @@ const int __linuxthreads_pthread_threads_max = PTHREAD_THREADS_MAX;
/* Indicate whether at least one thread has a user-defined stack (if 1),
or if all threads have stacks supplied by LinuxThreads (if 0). */
int __pthread_nonstandard_stacks = 0;
int __pthread_nonstandard_stacks;
/* Number of active entries in __pthread_handles (used by gdb) */
volatile int __pthread_handles_num = 2;
/* Whether to use debugger additional actions for thread creation
(set to 1 by gdb) */
volatile int __pthread_threads_debug = 0;
volatile int __pthread_threads_debug;
/* Globally enabled events. */
volatile td_thr_events_t __pthread_threads_events;
/* Mapping from stack segment to thread descriptor. */
/* Stack segment numbers are also indices into the __pthread_handles array. */
@@ -80,7 +83,9 @@ static pthread_t pthread_threads_counter = 0;
static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
void * (*start_routine)(void *), void *arg,
sigset_t *mask, int father_pid);
sigset_t *mask, int father_pid,
int report_events,
td_thr_events_t *event_maskp);
static void pthread_handle_free(pthread_t th_id);
static void pthread_handle_exit(pthread_descr issuing_thread, int exitcode);
static void pthread_reap_children(void);
@@ -141,7 +146,9 @@ int __pthread_manager(void *arg)
request.req_args.create.fn,
request.req_args.create.arg,
&request.req_args.create.mask,
request.req_thread->p_pid);
request.req_thread->p_pid,
request.req_thread->p_report_events,
&request.req_thread->p_eventbuf.eventmask);
restart(request.req_thread);
break;
case REQ_FREE:
@@ -220,6 +227,19 @@ static int pthread_start_thread(void *arg)
return 0;
}
static int pthread_start_thread_event(void *arg)
{
pthread_descr self = thread_self ();
/* Get the lock the manager will free once all is correctly set up. */
__pthread_lock (THREAD_GETMEM(self, p_lock), NULL);
/* Free it immediately. */
__pthread_unlock (THREAD_GETMEM(self, p_lock));
/* Continue with the real function. */
return pthread_start_thread (arg);
}
static int pthread_allocate_stack(const pthread_attr_t *attr,
pthread_descr default_new_thread,
int pagesize,
@@ -297,7 +317,9 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
void * (*start_routine)(void *), void *arg,
sigset_t * mask, int father_pid)
sigset_t * mask, int father_pid,
int report_events,
td_thr_events_t *event_maskp)
{
size_t sseg;
int pid;
@@ -372,10 +394,47 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
new_thread->p_start_args.mask = *mask;
/* Raise priority of thread manager if needed */
__pthread_manager_adjust_prio(new_thread->p_priority);
/* Do the cloning */
pid = __clone(pthread_start_thread, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
/* Do the cloning. We have to use two different functions depending
on whether we are debugging or not. */
pid = 0; /* Note that the thread never can have PID zero. */
if (report_events)
{
/* See whether the TD_CREATE event bit is set in any of the
masks. */
int idx = __td_eventword (TD_CREATE);
uint32_t mask = __td_eventmask (TD_CREATE);
if ((mask & (__pthread_threads_events.event_bits[idx]
| event_maskp->event_bits[idx])) != 0)
{
/* Lock the mutex the child will use now so that it will stop. */
__pthread_lock(new_thread->p_lock, NULL);
/* We have to report this event. */
pid = __clone(pthread_start_thread_event, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
if (pid != -1)
{
/* Now fill in the information about the new thread in
the newly created thread's data structure. We cannot let
the new thread do this since we don't know whether it was
already scheduled when we send the event. */
new_thread->p_eventbuf.eventdata = new_thread;
new_thread->p_eventbuf.eventnum = TD_CREATE;
/* Now call the function which signals the event. */
__linuxthreads_create_event ();
/* Now restart the thread. */
__pthread_unlock(new_thread->p_lock);
}
}
}
if (pid == 0)
pid = __clone(pthread_start_thread, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
/* Check if cloning succeeded */
if (pid == -1) {
/* Free the stack if we allocated it */
@@ -451,6 +510,24 @@ static void pthread_exited(pid_t pid)
/* Mark thread as exited, and if detached, free its resources */
__pthread_lock(th->p_lock, NULL);
th->p_exited = 1;
/* If we have to signal this event do it now. */
if (th->p_report_events)
{
/* See whether TD_DEATH is in any of the mask. */
int idx = __td_eventword (TD_REAP);
uint32_t mask = __td_eventmask (TD_REAP);
if ((mask & (__pthread_threads_events.event_bits[idx]
| th->p_eventbuf.eventmask.event_bits[idx])) != 0)
{
/* Yep, we have to signal the death. */
th->p_eventbuf.eventnum = TD_DEATH;
th->p_eventbuf.eventdata = th;
/* Now call the function to signal the event. */
__linuxthreads_reap_event();
}
}
detached = th->p_detached;
__pthread_unlock(th->p_lock);
if (detached)