+2007-05-16 Roland McGrath <roland@redhat.com>
+
+ * init.c (__nptl_initial_report_events): New variable.
+ (__pthread_initialize_minimal_internal): Initialize pd->report_events
+ to that.
+
2007-06-22 Jakub Jelinek <jakub@redhat.com>
* pthread_getattr_np.c (pthread_getattr_np): Clear cpuset and
+2007-05-16 Roland McGrath <roland@redhat.com>
+
+ * td_thr_get_info.c: Fake the results for TH->th_unique == 0.
+ * td_thr_validate.c: Likewise.
+ * td_thr_setgregs.c: Likewise.
+ * td_thr_setfpregs.c: Likewise.
+ * td_thr_getgregs.c: Likewise.
+ * td_thr_getfpregs.c: Likewise.
+ * td_thr_tlsbase.c: Likewise.
+
+ * structs.def: Add DB_VARIABLE (__nptl_initial_report_events).
+ * db_info.c: Add necessary declaration.
+ * td_thr_event_enable.c: Set __nptl_initial_report_events too.
+
+ * td_ta_thr_iter.c (iterate_thread_list): Make FAKE_EMPTY bool.
+ Use th_unique=0 in fake descriptor before initialization.
+
+ * td_ta_map_lwp2thr.c (__td_ta_lookup_th_unique): New function, broken
+ out of ...
+ (td_ta_map_lwp2thr): ... here, call it. But don't before __stack_user
+ is initialized, then fake a handle with th_unique=0.
+ * thread_dbP.h: Declare it.
+
2006-10-26 Pete Eberlein <eberlein@us.ibm.com>
* nptl_db/db_info.c [TLS_DTV_AT_TP]: Fixed size init for dtvp
/* This file is included by pthread_create.c to define in libpthread
all the magic symbols required by libthread_db.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
typedef struct link_map link_map;
+/* Actually static in nptl/init.c, but we only need it for typeof. */
+extern bool __nptl_initial_report_events;
#define schedparam_sched_priority schedparam.sched_priority
/* List of types and symbols in libpthread examined by libthread_db.
- Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
DB_SYMBOL (__nptl_threads_events)
DB_VARIABLE (__nptl_nthreads)
DB_VARIABLE (__nptl_last_event)
+DB_VARIABLE (__nptl_initial_report_events)
DB_ARRAY_VARIABLE (__pthread_keys)
DB_STRUCT (pthread_key_struct)
/* Which thread is running on an LWP?
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
td_err_e
-td_ta_map_lwp2thr (const td_thragent_t *ta_arg,
- lwpid_t lwpid, td_thrhandle_t *th)
+__td_ta_lookup_th_unique (const td_thragent_t *ta_arg,
+ lwpid_t lwpid, td_thrhandle_t *th)
{
td_thragent_t *const ta = (td_thragent_t *) ta_arg;
ps_err_e err;
switch (ta->ta_howto)
{
- case ta_howto_unknown:
- return TD_DBERR;
-
default:
return TD_DBERR;
0, regs, &addr);
if (terr != TD_OK)
return terr;
+
/* In this descriptor the nelem word is overloaded as the bias. */
addr += (int32_t) DB_DESC_NELEM (ta->ta_howto_data.reg);
th->th_unique = addr;
if (&ps_get_thread_area == NULL)
return TD_NOCAPAB;
- /* A la x86-64, there is a constant magic index for get_thread_area. */
- if (ps_get_thread_area (ta->ph, lwpid,
- ta->ta_howto_data.const_thread_area,
- &th->th_unique) != PS_OK)
- return TD_ERR; /* XXX Other error value? */
- break;
+ /* A la x86-64, there is a magic index for get_thread_area. */
+ if (ps_get_thread_area (ta->ph, lwpid,
+ ta->ta_howto_data.const_thread_area,
+ &th->th_unique) != PS_OK)
+ return TD_ERR; /* XXX Other error value? */
+ break;
- case ta_howto_reg_thread_area:
+ case ta_howto_reg_thread_area:
if (&ps_get_thread_area == NULL)
return TD_NOCAPAB;
- /* A la i386, there is a register with an index for get_thread_area. */
- if (ps_lgetregs (ta->ph, lwpid, regs) != PS_OK)
- return TD_ERR;
- terr = _td_fetch_value_local (ta, ta->ta_howto_data.reg_thread_area, -1,
- 0, regs, &addr);
+ /* A la i386, a register holds the index for get_thread_area. */
+ if (ps_lgetregs (ta->ph, lwpid, regs) != PS_OK)
+ return TD_ERR;
+ terr = _td_fetch_value_local (ta, ta->ta_howto_data.reg_thread_area,
+ -1, 0, regs, &addr);
if (terr != TD_OK)
return terr;
/* In this descriptor the nelem word is overloaded as scale factor. */
}
/* Found it. Now complete the `td_thrhandle_t' object. */
- th->th_ta_p = (td_thragent_t *) ta;
+ th->th_ta_p = ta;
return TD_OK;
}
+
+td_err_e
+td_ta_map_lwp2thr (const td_thragent_t *ta_arg,
+ lwpid_t lwpid, td_thrhandle_t *th)
+{
+ td_thragent_t *const ta = (td_thragent_t *) ta_arg;
+
+ /* We cannot rely on thread registers and such information at all
+ before __pthread_initialize_minimal has gotten far enough. They
+ sometimes contain garbage that would confuse us, left by the kernel
+ at exec. So if it looks like initialization is incomplete, we only
+ fake a special descriptor for the initial thread. */
+
+ psaddr_t list;
+ td_err_e err = DB_GET_SYMBOL (list, ta, __stack_user);
+ if (err != TD_OK)
+ return err;
+
+ err = DB_GET_FIELD (list, ta, list, list_t, next, 0);
+ if (err != TD_OK)
+ return err;
+
+ if (list == 0)
+ {
+ if (ps_getpid (ta->ph) != lwpid)
+ return TD_ERR;
+ th->th_ta_p = ta;
+ th->th_unique = 0;
+ return TD_OK;
+ }
+
+ return __td_ta_lookup_th_unique (ta_arg, lwpid, th);
+}
/* Iterate over a process's threads.
- Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
+ Copyright (C) 1999,2000,2001,2002,2003,2004,2007
+ Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
static td_err_e
iterate_thread_list (td_thragent_t *ta, td_thr_iter_f *callback,
void *cbdata_p, td_thr_state_e state, int ti_pri,
- psaddr_t head, int fake_empty)
+ psaddr_t head, bool fake_empty)
{
td_err_e err;
psaddr_t next, ofs;
if (next == 0 && fake_empty)
{
- /* __pthread_initialize_minimal has not run.
- There is just the main thread to return. */
- td_thrhandle_t th;
- err = td_ta_map_lwp2thr (ta, ps_getpid (ta->ph), &th);
- if (err == TD_OK)
- err = callback (&th, cbdata_p) != 0 ? TD_DBERR : TD_OK;
- return err;
+ /* __pthread_initialize_minimal has not run. There is just the main
+ thread to return. We cannot rely on its thread register. They
+ sometimes contain garbage that would confuse us, left by the
+ kernel at exec. So if it looks like initialization is incomplete,
+ we only fake a special descriptor for the initial thread. */
+ td_thrhandle_t th = { ta, 0 };
+ return callback (&th, cbdata_p) != 0 ? TD_DBERR : TD_OK;
}
/* Cache the offset from struct pthread to its list_t member. */
err = DB_GET_SYMBOL (list, ta, __stack_user);
if (err == TD_OK)
- err = iterate_thread_list (ta, callback, cbdata_p, state, ti_pri, list, 1);
+ err = iterate_thread_list (ta, callback, cbdata_p, state, ti_pri,
+ list, true);
/* And the threads with stacks allocated by the implementation. */
if (err == TD_OK)
err = DB_GET_SYMBOL (list, ta, stack_used);
if (err == TD_OK)
- err = iterate_thread_list (ta, callback, cbdata_p, state, ti_pri, list, 0);
+ err = iterate_thread_list (ta, callback, cbdata_p, state, ti_pri,
+ list, false);
return err;
}
/* Enable event process-wide.
- Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
{
LOG ("td_thr_event_enable");
- /* Write the new value into the thread data structure. */
- return DB_PUT_FIELD (th->th_ta_p, th->th_unique, pthread, report_events, 0,
+ if (th->th_unique != 0)
+ {
+ /* Write the new value into the thread data structure. */
+ td_err_e err = DB_PUT_FIELD (th->th_ta_p, th->th_unique, pthread,
+ report_events, 0,
+ (psaddr_t) 0 + (onoff != 0));
+ if (err != TD_OK)
+ return err;
+
+ /* Just in case we are in the window between initializing __stack_user
+ and copying from __nptl_initial_report_events, we set it too.
+ It doesn't hurt to do this for non-initial threads, since it
+ won't be consulted again anyway. It would take another fetch
+ to get the tid and determine this isn't the initial thread,
+ so just do it always. */
+ }
+
+ /* We are faking it for the initial thread before its thread
+ descriptor is set up. */
+ return DB_PUT_VALUE (th->th_ta_p, __nptl_initial_report_events, 0,
(psaddr_t) 0 + (onoff != 0));
}
/* Get thread information.
- Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999,2000,2001,2002,2003,2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
LOG ("td_thr_get_info");
- /* Copy the whole descriptor in once so we can access the several
- fields locally. Excess copying in one go is much better than
- multiple ps_pdread calls. */
- err = DB_GET_STRUCT (copy, th->th_ta_p, th->th_unique, pthread);
- if (err != TD_OK)
- return err;
-
- err = DB_GET_FIELD_ADDRESS (tls, th->th_ta_p, th->th_unique,
- pthread, specific, 0);
- if (err != TD_OK)
- return err;
-
- err = DB_GET_FIELD_LOCAL (schedpolicy, th->th_ta_p, copy, pthread,
- schedpolicy, 0);
- if (err != TD_OK)
- return err;
- err = DB_GET_FIELD_LOCAL (schedprio, th->th_ta_p, copy, pthread,
- schedparam_sched_priority, 0);
- if (err != TD_OK)
- return err;
- err = DB_GET_FIELD_LOCAL (tid, th->th_ta_p, copy, pthread, tid, 0);
- if (err != TD_OK)
- return err;
- err = DB_GET_FIELD_LOCAL (cancelhandling, th->th_ta_p, copy, pthread,
- cancelhandling, 0);
- if (err != TD_OK)
- return err;
- err = DB_GET_FIELD_LOCAL (report_events, th->th_ta_p, copy, pthread,
- report_events, 0);
+ if (th->th_unique == 0)
+ {
+ /* Special case for the main thread before initialization. */
+ copy = NULL;
+ tls = 0;
+ cancelhandling = 0;
+ schedprio = 0;
+ tid = 0;
+ err = DB_GET_VALUE (report_events, th->th_ta_p,
+ __nptl_initial_report_events, 0);
+ }
+ else
+ {
+ /* Copy the whole descriptor in once so we can access the several
+ fields locally. Excess copying in one go is much better than
+ multiple ps_pdread calls. */
+ err = DB_GET_STRUCT (copy, th->th_ta_p, th->th_unique, pthread);
+ if (err != TD_OK)
+ return err;
+
+ err = DB_GET_FIELD_ADDRESS (tls, th->th_ta_p, th->th_unique,
+ pthread, specific, 0);
+ if (err != TD_OK)
+ return err;
+
+ err = DB_GET_FIELD_LOCAL (schedpolicy, th->th_ta_p, copy, pthread,
+ schedpolicy, 0);
+ if (err != TD_OK)
+ return err;
+ err = DB_GET_FIELD_LOCAL (schedprio, th->th_ta_p, copy, pthread,
+ schedparam_sched_priority, 0);
+ if (err != TD_OK)
+ return err;
+ err = DB_GET_FIELD_LOCAL (tid, th->th_ta_p, copy, pthread, tid, 0);
+ if (err != TD_OK)
+ return err;
+ err = DB_GET_FIELD_LOCAL (cancelhandling, th->th_ta_p, copy, pthread,
+ cancelhandling, 0);
+ if (err != TD_OK)
+ return err;
+ err = DB_GET_FIELD_LOCAL (report_events, th->th_ta_p, copy, pthread,
+ report_events, 0);
+ }
if (err != TD_OK)
return err;
infop->ti_lid = tid == 0 ? ps_getpid (th->th_ta_p->ph) : (uintptr_t) tid;
infop->ti_traceme = report_events != 0;
- err = DB_GET_FIELD_LOCAL (infop->ti_startfunc, th->th_ta_p, copy, pthread,
- start_routine, 0);
- if (err == TD_OK)
+ if (copy != NULL)
+ err = DB_GET_FIELD_LOCAL (infop->ti_startfunc, th->th_ta_p, copy, pthread,
+ start_routine, 0);
+ if (copy != NULL && err == TD_OK)
{
uint32_t idx;
for (idx = 0; idx < TD_EVENTSIZE; ++idx)
/* Get a thread's floating-point register set.
- Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
LOG ("td_thr_getfpregs");
+ if (th->th_unique == 0)
+ /* Special case for the main thread before initialization. */
+ return ps_lgetfpregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
+ regset) != PS_OK ? TD_ERR : TD_OK;
+
/* We have to get the state and the PID for this thread. */
err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
cancelhandling, 0);
/* Get a thread's general register set.
- Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
LOG ("td_thr_getgregs");
+ if (th->th_unique == 0)
+ /* Special case for the main thread before initialization. */
+ return ps_lgetregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
+ regset) != PS_OK ? TD_ERR : TD_OK;
+
/* We have to get the state and the PID for this thread. */
err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
cancelhandling, 0);
/* Set a thread's floating-point register set.
- Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
LOG ("td_thr_setfpregs");
+ if (th->th_unique == 0)
+ /* Special case for the main thread before initialization. */
+ return ps_lsetfpregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
+ fpregs) != PS_OK ? TD_ERR : TD_OK;
+
/* We have to get the state and the PID for this thread. */
err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
cancelhandling, 0);
/* Set a thread's general register set.
- Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
LOG ("td_thr_setgregs");
+ if (th->th_unique == 0)
+ /* Special case for the main thread before initialization. */
+ return ps_lsetregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
+ gregs) != PS_OK ? TD_ERR : TD_OK;
+
/* We have to get the state and the PID for this thread. */
err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
cancelhandling, 0);
/* Locate TLS data for a thread.
- Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
if (modid < 1)
return TD_NOTLS;
+ psaddr_t pd = th->th_unique;
+ if (pd == 0)
+ {
+ /* This is the fake handle for the main thread before libpthread
+ initialization. We are using 0 for its th_unique because we can't
+ trust that its thread register has been initialized. But we need
+ a real pointer to have any TLS access work. In case of dlopen'd
+ libpthread, initialization might not be for quite some time. So
+ try looking up the thread register now. Worst case, it's nonzero
+ uninitialized garbage and we get bogus results for TLS access
+ attempted too early. Tough. */
+
+ td_thrhandle_t main_th;
+ err = __td_ta_lookup_th_unique (th->th_ta_p, ps_getpid (th->th_ta_p->ph),
+ &main_th);
+ if (err == 0)
+ pd = main_th.th_unique;
+ if (pd == 0)
+ return TD_TLSDEFER;
+ }
+
/* Get the DTV pointer from the thread descriptor. */
- err = DB_GET_FIELD (dtv, th->th_ta_p, th->th_unique, pthread, dtvp, 0);
+ err = DB_GET_FIELD (dtv, th->th_ta_p, pd, pthread, dtvp, 0);
if (err != TD_OK)
return err;
/* Validate a thread handle.
- Copyright (C) 1999, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1999,2001,2002,2003,2004,2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
if (err == TD_OK)
err = check_thread_list (th, list, &uninit);
- if (err == TD_NOTHR && uninit)
- {
- /* __pthread_initialize_minimal has not run yet.
- But the main thread still has a valid ID. */
- td_thrhandle_t main_th;
- err = td_ta_map_lwp2thr (th->th_ta_p,
- ps_getpid (th->th_ta_p->ph), &main_th);
- if (err == TD_OK && th->th_unique != main_th.th_unique)
- err = TD_NOTHR;
- }
+ if (err == TD_NOTHR && uninit && th->th_unique == 0)
+ /* __pthread_initialize_minimal has not run yet.
+ There is only the special case thread handle. */
+ err = TD_OK;
}
return err;
/* Private header for thread debug library
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
extern td_err_e _td_check_sizeof (td_thragent_t *ta, uint32_t *sizep,
int sizep_name) attribute_hidden;
+extern td_err_e __td_ta_lookup_th_unique (const td_thragent_t *ta,
+ lwpid_t lwpid, td_thrhandle_t *th);
+
#endif /* thread_dbP.h */
projects / platform / upstream / glibc.git / commitdiff