gdb/

Fix step_resume_breakpoint unsaved during an infcall.
	* gdbthread.h (struct thread_control_state): Move here field
	step_resume_breakpoint ...
	(struct thread_info): ... from here.
	* infrun.c (save_infcall_control_state): Reset
	control.step_resume_breakpoint to NULL.
	(restore_infcall_control_state, discard_infcall_control_state): Delete
	control.step_resume_breakpoint.
	* arm-linux-tdep.c, infrun.c, thread.c: Update all the references to
	the moved field.

gdb/testsuite/
	Fix step_resume_breakpoint unsaved during an infcall.
	* gdb.base/step-resume-infcall.exp: New file.
	* gdb.base/step-resume-infcall.c: New file.

gdb/ChangeLog

@@ -1,3 +1,16 @@
+2010-11-28  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix step_resume_breakpoint unsaved during an infcall.
+	* gdbthread.h (struct thread_control_state): Move here field
+	step_resume_breakpoint ...
+	(struct thread_info): ... from here.
+	* infrun.c (save_infcall_control_state): Reset
+	control.step_resume_breakpoint to NULL.
+	(restore_infcall_control_state, discard_infcall_control_state): Delete
+	control.step_resume_breakpoint.
+	* arm-linux-tdep.c, infrun.c, thread.c: Update all the references to
+	the moved field.
+
 2010-11-28  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	Rename and move inferior_thread_state and inferior_status.

gdb/arm-linux-tdep.c

@@ -791,7 +791,8 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
 	    fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. "
 	      "Setting momentary breakpoint.\n", (unsigned long) return_to);
 
-	  gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
+	  gdb_assert (inferior_thread ()->control.step_resume_breakpoint
+		      == NULL);
 
 	  sal = find_pc_line (return_to, 0);
 	  sal.pc = return_to;
@@ -802,7 +803,7 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
 
 	  if (frame)
 	    {
-	      inferior_thread ()->step_resume_breakpoint
+	      inferior_thread ()->control.step_resume_breakpoint
         	= set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame),
 					    bp_step_resume);
 

gdb/gdbthread.h

@@ -37,6 +37,9 @@ struct thread_control_state
 {
   /* User/external stepping state.  */
 
+  /* Step-resume or longjmp-resume breakpoint.  */
+  struct breakpoint *step_resume_breakpoint;
+
   /* Range to single step within.
 
      If this is nonzero, respond to a single-step signal by continuing
@@ -151,11 +154,6 @@ struct thread_info
      call.  See `struct thread_suspend_state'.  */
   struct thread_suspend_state suspend;
 
-  /* User/external stepping state.  */
-
-  /* Step-resume or longjmp-resume breakpoint.  */
-  struct breakpoint *step_resume_breakpoint;
-
   int current_line;
   struct symtab *current_symtab;
 

gdb/infrun.c

@@ -424,8 +424,8 @@ follow_fork (void)
 	   preserve the stepping state in the fork child.  */
 	if (follow_child && should_resume)
 	  {
-	    step_resume_breakpoint
+	    step_resume_breakpoint = clone_momentary_breakpoint
-	      = clone_momentary_breakpoint (tp->step_resume_breakpoint);
+					 (tp->control.step_resume_breakpoint);
 	    step_range_start = tp->control.step_range_start;
 	    step_range_end = tp->control.step_range_end;
 	    step_frame_id = tp->control.step_frame_id;
@@ -476,7 +476,8 @@ follow_fork (void)
 		if (should_resume)
 		  {
 		    tp = inferior_thread ();
-		    tp->step_resume_breakpoint = step_resume_breakpoint;
+		    tp->control.step_resume_breakpoint
+		      = step_resume_breakpoint;
 		    tp->control.step_range_start = step_range_start;
 		    tp->control.step_range_end = step_range_end;
 		    tp->control.step_frame_id = step_frame_id;
@@ -530,8 +531,8 @@ follow_inferior_reset_breakpoints (void)
      "threads".  We must update the bp's notion of which thread
      it is for, or it'll be ignored when it triggers.  */
 
-  if (tp->step_resume_breakpoint)
+  if (tp->control.step_resume_breakpoint)
-    breakpoint_re_set_thread (tp->step_resume_breakpoint);
+    breakpoint_re_set_thread (tp->control.step_resume_breakpoint);
 
   /* Reinsert all breakpoints in the child.  The user may have set
      breakpoints after catching the fork, in which case those
@@ -769,7 +770,7 @@ follow_exec (ptid_t pid, char *execd_pathname)
 
   /* If there was one, it's gone now.  We cannot truly step-to-next
      statement through an exec(). */
-  th->step_resume_breakpoint = NULL;
+  th->control.step_resume_breakpoint = NULL;
   th->control.step_range_start = 0;
   th->control.step_range_end = 0;
 
@@ -3951,7 +3952,8 @@ infrun: no user watchpoint explains watchpoint SIGTRAP, ignoring\n");
 	      || stopped_by_watchpoint
 	      || ecs->event_thread->control.trap_expected
 	      || (ecs->event_thread->control.step_range_end
-		  && ecs->event_thread->step_resume_breakpoint == NULL));
+		  && (ecs->event_thread->control.step_resume_breakpoint
+		      == NULL)));
       else
 	{
 	  ecs->random_signal = !bpstat_explains_signal
@@ -4019,7 +4021,7 @@ process_event_stop_test:
 
       if (ecs->event_thread->prev_pc == stop_pc
 	  && ecs->event_thread->control.trap_expected
-	  && ecs->event_thread->step_resume_breakpoint == NULL)
+	  && ecs->event_thread->control.step_resume_breakpoint == NULL)
 	{
 	  /* We were just starting a new sequence, attempting to
 	     single-step off of a breakpoint and expecting a SIGTRAP.
@@ -4048,7 +4050,7 @@ process_event_stop_test:
 	      && stop_pc < ecs->event_thread->control.step_range_end)
 	  && frame_id_eq (get_stack_frame_id (frame),
 			  ecs->event_thread->control.step_stack_frame_id)
-	  && ecs->event_thread->step_resume_breakpoint == NULL)
+	  && ecs->event_thread->control.step_resume_breakpoint == NULL)
 	{
 	  /* The inferior is about to take a signal that will take it
 	     out of the single step range.  Set a breakpoint at the
@@ -4135,7 +4137,8 @@ infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME (!gdbarch_get_longjmp_target)\n");
 	  fprintf_unfiltered (gdb_stdlog,
 			      "infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
 
-	gdb_assert (ecs->event_thread->step_resume_breakpoint != NULL);
+	gdb_assert (ecs->event_thread->control.step_resume_breakpoint
+		    != NULL);
 	delete_step_resume_breakpoint (ecs->event_thread);
 
 	ecs->event_thread->control.stop_step = 1;
@@ -4311,7 +4314,7 @@ infrun: not switching back to stepped thread, it has vanished\n");
       return;
     }
 
-  if (ecs->event_thread->step_resume_breakpoint)
+  if (ecs->event_thread->control.step_resume_breakpoint)
     {
       if (debug_infrun)
 	 fprintf_unfiltered (gdb_stdlog,
@@ -4862,10 +4865,11 @@ infrun: not switching back to stepped thread, it has vanished\n");
 static int
 currently_stepping (struct thread_info *tp)
 {
-  return ((tp->control.step_range_end && tp->step_resume_breakpoint == NULL)
+  return ((tp->control.step_range_end
- 	  || tp->control.trap_expected
+	   && tp->control.step_resume_breakpoint == NULL)
- 	  || tp->stepping_through_solib_after_catch
+	  || tp->control.trap_expected
- 	  || bpstat_should_step ());
+	  || tp->stepping_through_solib_after_catch
+	  || bpstat_should_step ());
 }
 
 /* Returns true if any thread *but* the one passed in "data" is in the
@@ -5010,14 +5014,14 @@ insert_step_resume_breakpoint_at_sal (struct gdbarch *gdbarch,
   /* There should never be more than one step-resume or longjmp-resume
      breakpoint per thread, so we should never be setting a new
      step_resume_breakpoint when one is already active.  */
-  gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
+  gdb_assert (inferior_thread ()->control.step_resume_breakpoint == NULL);
 
   if (debug_infrun)
     fprintf_unfiltered (gdb_stdlog,
 			"infrun: inserting step-resume breakpoint at %s\n",
 			paddress (gdbarch, sr_sal.pc));
 
-  inferior_thread ()->step_resume_breakpoint
+  inferior_thread ()->control.step_resume_breakpoint
     = set_momentary_breakpoint (gdbarch, sr_sal, sr_id, bp_step_resume);
 }
 
@@ -5094,14 +5098,14 @@ insert_longjmp_resume_breakpoint (struct gdbarch *gdbarch, CORE_ADDR pc)
   /* There should never be more than one step-resume or longjmp-resume
      breakpoint per thread, so we should never be setting a new
      longjmp_resume_breakpoint when one is already active.  */
-  gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
+  gdb_assert (inferior_thread ()->control.step_resume_breakpoint == NULL);
 
   if (debug_infrun)
     fprintf_unfiltered (gdb_stdlog,
 			"infrun: inserting longjmp-resume breakpoint at %s\n",
 			paddress (gdbarch, pc));
 
-  inferior_thread ()->step_resume_breakpoint =
+  inferior_thread ()->control.step_resume_breakpoint =
     set_momentary_breakpoint_at_pc (gdbarch, pc, bp_longjmp_resume);
 }
 
@@ -6212,6 +6216,8 @@ save_infcall_control_state (void)
   inf_status->thread_control = tp->control;
   inf_status->inferior_control = inf->control;
 
+  tp->control.step_resume_breakpoint = NULL;
+
   /* Save original bpstat chain to INF_STATUS; replace it in TP with copy of
      chain.  If caller's caller is walking the chain, they'll be happier if we
      hand them back the original chain when restore_infcall_control_state is
@@ -6257,6 +6263,9 @@ restore_infcall_control_state (struct infcall_control_state *inf_status)
   struct thread_info *tp = inferior_thread ();
   struct inferior *inf = current_inferior ();
 
+  if (tp->control.step_resume_breakpoint)
+    tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop;
+
   /* Handle the bpstat_copy of the chain.  */
   bpstat_clear (&tp->control.stop_bpstat);
 
@@ -6301,8 +6310,13 @@ make_cleanup_restore_infcall_control_state
 void
 discard_infcall_control_state (struct infcall_control_state *inf_status)
 {
+  if (inf_status->thread_control.step_resume_breakpoint)
+    inf_status->thread_control.step_resume_breakpoint->disposition
+      = disp_del_at_next_stop;
+
   /* See save_infcall_control_state for info on stop_bpstat. */
   bpstat_clear (&inf_status->thread_control.stop_bpstat);
+
   xfree (inf_status);
 }
 

gdb/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2010-11-28  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix step_resume_breakpoint unsaved during an infcall.
+	* gdb.base/step-resume-infcall.exp: New file.
+	* gdb.base/step-resume-infcall.c: New file.
+
 2010-11-24  Edjunior Machado  <emachado@br.ibm.com>
 
 	* gdb.asm/powerpc.inc: Use 'sys_exit' on gdbasm_exit0 macro.

gdb/testsuite/gdb.base/step-resume-infcall.c

@@ -0,0 +1,47 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+
+volatile int cond_hit;
+
+int
+cond (void)
+{
+  cond_hit++;
+
+  return 1;
+}
+
+int
+func (void)
+{
+  return 0;	/* in-func */
+}
+
+int
+main (void)
+{
+  /* Variable is used so that there is always at least one instruction on the
+     same line after FUNC returns.  */
+  int i = func ();	/* call-func */
+
+  /* Dummy calls.  */
+  cond ();
+  func ();
+  return 0;
+}

gdb/testsuite/gdb.base/step-resume-infcall.exp

@@ -0,0 +1,52 @@
+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set testfile "step-resume-infcall"
+
+if { [prepare_for_testing ${testfile}.exp ${testfile}] } {
+    return -1
+}
+
+if ![runto_main] {
+    return -1
+}
+
+gdb_test "step" " in-func .*"
+gdb_test "up" " call-func .*"
+gdb_test_no_output {set $b=$pc}
+
+if ![runto_main] {
+    return -1
+}
+
+gdb_breakpoint {*$b if cond ()}
+
+set test {print $bpnum}
+gdb_test_multiple $test $test {
+    -re " = (\[0-9\]+)\r\n$gdb_prompt $" {
+	set caller_bp $expect_out(1,string)
+	pass $test
+    }
+}
+
+# Debug only:
+gdb_test "disass/m" ".*"
+gdb_test "info breakpoints" ".*"
+
+gdb_test "next" "Breakpoint $caller_bp, .* call-func .*"
+
+# `cond-hit' is now hit twice; but it may not be in the future.  It is
+# currently not a bug so it is not KFAILed.
+gdb_test "p cond_hit" { = [12]}

gdb/thread.c

@@ -83,10 +83,10 @@ inferior_thread (void)
 void
 delete_step_resume_breakpoint (struct thread_info *tp)
 {
-  if (tp && tp->step_resume_breakpoint)
+  if (tp && tp->control.step_resume_breakpoint)
     {
-      delete_breakpoint (tp->step_resume_breakpoint);
+      delete_breakpoint (tp->control.step_resume_breakpoint);
-      tp->step_resume_breakpoint = NULL;
+      tp->control.step_resume_breakpoint = NULL;
     }
 }
 
@@ -97,10 +97,10 @@ clear_thread_inferior_resources (struct thread_info *tp)
      but not any user-specified thread-specific breakpoints.  We can not
      delete the breakpoint straight-off, because the inferior might not
      be stopped at the moment.  */
-  if (tp->step_resume_breakpoint)
+  if (tp->control.step_resume_breakpoint)
     {
-      tp->step_resume_breakpoint->disposition = disp_del_at_next_stop;
+      tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop;
-      tp->step_resume_breakpoint = NULL;
+      tp->control.step_resume_breakpoint = NULL;
     }
 
   bpstat_clear (&tp->control.stop_bpstat);