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[rfa] Printf debugging output in lin-lwp.c
- To: gdb-patches at sourceware dot cygnus dot com
- Subject: [rfa] Printf debugging output in lin-lwp.c
- From: Michael Snyder <msnyder at cygnus dot com>
- Date: Mon, 30 Apr 2001 11:29:42 -0700
- CC: cagney at cygnus dot com, kevinb at cygnus dot com, kettenis at wins dot uva dot nl
- Organization: Red Hat
Mark, how about this?
2001-04-30 Michael Snyder <msnyder@redhat.com>
* thread-db.c: Revert 2001-04-26 change for debugging output.
* lin-lwp.c: Ditto.
* lin-lwp.c: Add set/show debug lin-lwp command. Use this
command to turn extra debugging output on / off.
Index: lin-lwp.c
===================================================================
RCS file: /cvs/src/src/gdb/lin-lwp.c,v
retrieving revision 1.11
diff -c -3 -p -r1.11 lin-lwp.c
*** lin-lwp.c 2001/04/30 18:21:17 1.11
--- lin-lwp.c 2001/04/30 18:26:45
***************
*** 30,41 ****
#include "inferior.h"
#include "target.h"
#include "regcache.h"
! #define DEBUG 1
!
! #if DEBUG
extern const char *strsignal (int sig);
- #endif
/* On Linux there are no real LWP's. The closest thing to LWP's are
processes sharing the same VM space. A multi-threaded process is
--- 30,39 ----
#include "inferior.h"
#include "target.h"
#include "regcache.h"
+ #include "gdbcmd.h"
! static int debug_lin_lwp;
extern const char *strsignal (int sig);
/* On Linux there are no real LWP's. The closest thing to LWP's are
processes sharing the same VM space. A multi-threaded process is
*************** stop_wait_callback (struct lwp_info *lp,
*** 521,529 ****
printf_unfiltered ("[%s exited]\n",
target_pid_to_str (lp->pid));
}
! #if DEBUG
! printf ("%s exited.\n", target_pid_to_str (lp->pid));
! #endif
delete_lwp (lp->pid);
return 0;
}
--- 519,527 ----
printf_unfiltered ("[%s exited]\n",
target_pid_to_str (lp->pid));
}
! if (debug_lin_lwp)
! printf ("%s exited.\n", target_pid_to_str (lp->pid));
!
delete_lwp (lp->pid);
return 0;
}
*************** stop_wait_callback (struct lwp_info *lp,
*** 549,569 ****
If we do not do this, then we run the risk that the
user will delete or disable the breakpoint, but the
thread will have already tripped on it. */
! #if DEBUG
! printf ("Tripped breakpoint at %lx in LWP %d"
! " while waiting for SIGSTOP.\n",
! (long) read_pc_pid (lp->pid), pid);
! #endif
/* Set the PC to before the trap. */
if (DECR_PC_AFTER_BREAK)
write_pc_pid (read_pc_pid (pid) - DECR_PC_AFTER_BREAK, pid);
}
else
{
! #if DEBUG
! printf ("Received %s in LWP %d while waiting for SIGSTOP.\n",
! strsignal (WSTOPSIG (status)), pid);
! #endif
/* The thread was stopped with a signal other than
SIGSTOP, and didn't accidentiliy trip a breakpoint.
Record the wait status. */
--- 547,568 ----
If we do not do this, then we run the risk that the
user will delete or disable the breakpoint, but the
thread will have already tripped on it. */
!
! if (debug_lin_lwp)
! printf ("Tripped breakpoint at %lx in LWP %d"
! " while waiting for SIGSTOP.\n",
! (long) read_pc_pid (lp->pid), pid);
!
/* Set the PC to before the trap. */
if (DECR_PC_AFTER_BREAK)
write_pc_pid (read_pc_pid (pid) - DECR_PC_AFTER_BREAK, pid);
}
else
{
! if (debug_lin_lwp)
! printf ("Received %s in LWP %d while waiting for SIGSTOP.\n",
! strsignal (WSTOPSIG (status)), pid);
!
/* The thread was stopped with a signal other than
SIGSTOP, and didn't accidentiliy trip a breakpoint.
Record the wait status. */
*************** lin_lwp_wait (int pid, struct target_wai
*** 620,629 ****
lp = iterate_over_lwps (status_callback, NULL);
if (lp)
{
! #if DEBUG
! printf ("Using pending wait status for LWP %d.\n",
! GET_LWP (lp->pid));
! #endif
status = lp->status;
lp->status = 0;
}
--- 619,628 ----
lp = iterate_over_lwps (status_callback, NULL);
if (lp)
{
! if (debug_lin_lwp)
! printf ("Using pending wait status for LWP %d.\n",
! GET_LWP (lp->pid));
!
status = lp->status;
lp->status = 0;
}
*************** lin_lwp_wait (int pid, struct target_wai
*** 635,653 ****
}
else if (is_lwp (pid))
{
! #if DEBUG
! printf ("Waiting for specific LWP %d.\n", GET_LWP (pid));
! #endif
/* We have a specific LWP to check. */
lp = find_lwp_pid (GET_LWP (pid));
gdb_assert (lp);
status = lp->status;
lp->status = 0;
! #if DEBUG
! if (status)
printf ("Using pending wait status for LWP %d.\n",
GET_LWP (lp->pid));
- #endif
/* If we have to wait, take into account whether PID is a cloned
process or not. And we have to convert it to something that
--- 634,652 ----
}
else if (is_lwp (pid))
{
! if (debug_lin_lwp)
! printf ("Waiting for specific LWP %d.\n", GET_LWP (pid));
!
/* We have a specific LWP to check. */
lp = find_lwp_pid (GET_LWP (pid));
gdb_assert (lp);
status = lp->status;
lp->status = 0;
!
! if (debug_lin_lwp)
! if (status)
printf ("Using pending wait status for LWP %d.\n",
GET_LWP (lp->pid));
/* If we have to wait, take into account whether PID is a cloned
process or not. And we have to convert it to something that
*************** lin_lwp_wait (int pid, struct target_wai
*** 725,733 ****
printf_unfiltered ("[%s exited]\n",
target_pid_to_str (lp->pid));
}
! #if DEBUG
! printf ("%s exited.\n", target_pid_to_str (lp->pid));
! #endif
delete_lwp (lp->pid);
/* Make sure there is at least one thread running. */
--- 724,732 ----
printf_unfiltered ("[%s exited]\n",
target_pid_to_str (lp->pid));
}
! if (debug_lin_lwp)
! printf ("%s exited.\n", target_pid_to_str (lp->pid));
!
delete_lwp (lp->pid);
/* Make sure there is at least one thread running. */
*************** lin_lwp_wait (int pid, struct target_wai
*** 743,752 ****
if (lp->signalled && WIFSTOPPED (status)
&& WSTOPSIG (status) == SIGSTOP)
{
! #if DEBUG
! printf ("Delayed SIGSTOP caught for %s.\n",
! target_pid_to_str (lp->pid));
! #endif
/* This is a delayed SIGSTOP. */
lp->signalled = 0;
--- 742,751 ----
if (lp->signalled && WIFSTOPPED (status)
&& WSTOPSIG (status) == SIGSTOP)
{
! if (debug_lin_lwp)
! printf ("Delayed SIGSTOP caught for %s.\n",
! target_pid_to_str (lp->pid));
!
/* This is a delayed SIGSTOP. */
lp->signalled = 0;
*************** _initialize_lin_lwp (void)
*** 1040,1045 ****
--- 1039,1051 ----
sigdelset (&suspend_mask, SIGCHLD);
sigemptyset (&blocked_mask);
+
+ add_show_from_set (add_set_cmd ("lin-lwp", no_class, var_zinteger,
+ (char *) &debug_lin_lwp,
+ "Set debugging of linux lwp module.\n\
+ Enables printf debugging output.\n",
+ &setdebuglist),
+ &showdebuglist);
}