gdb/

	Revert:
	2010-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
		    Pedro Alves  <pedro@codesourcery.com>
	* gdbthread.h (currently_stepping): New declaration.
	* infrun.c (currently_stepping): Remove the forward declaration.
	(currently_stepping): Make it global.
	* linux-nat.c (resume_callback) <lp->stopped && lp->status == 0>: New
	variables tp and step, initialized them.  Pass STEP to to_resume.
	Print also possibly "PTRACE_SINGLESTEP" if STEP.  Initialize LP->STEP.
	* remote.c (currently_stepping_callback): New.
	(remote_vcont_resume)
	<ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)>:
	New variable tp.  Call currently_stepping_callback and step such
	thread.

gdb/testsuite/
	Revert:
	2010-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
	* gdb.threads/sigstep-threads.exp: New file.
	* gdb.threads/sigstep-threads.c: New file.

8 files changed, 31 insertions, 155 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b2c9650..eb5d6d6 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,20 @@
+2010-11-02  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Revert:
+	2010-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
+		    Pedro Alves  <pedro@codesourcery.com>
+	* gdbthread.h (currently_stepping): New declaration.
+	* infrun.c (currently_stepping): Remove the forward declaration.
+	(currently_stepping): Make it global.
+	* linux-nat.c (resume_callback) <lp->stopped && lp->status == 0>: New
+	variables tp and step, initialized them.  Pass STEP to to_resume.
+	Print also possibly "PTRACE_SINGLESTEP" if STEP.  Initialize LP->STEP.
+	* remote.c (currently_stepping_callback): New.
+	(remote_vcont_resume)
+	<ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)>:
+	New variable tp.  Call currently_stepping_callback and step such
+	thread.
+
 2010-11-01  Hui Zhu  <teawater@gmail.com>
 
 	* tracepoint.c (tfile_xfer_partial): Change lma to vma.
diff --git a/gdb/gdbthread.h b/gdb/gdbthread.h
index e89e88d..cd24eaf 100644
--- a/gdb/gdbthread.h
+++ b/gdb/gdbthread.h
@@ -352,6 +352,4 @@ extern struct thread_info* inferior_thread (void);
 
 extern void update_thread_list (void);
 
-extern int currently_stepping (struct thread_info *tp);
-
 #endif /* GDBTHREAD_H */
diff --git a/gdb/infrun.c b/gdb/infrun.c
index edd4a40..240cd95 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -74,6 +74,8 @@ static int follow_fork (void);
 static void set_schedlock_func (char *args, int from_tty,
 				struct cmd_list_element *c);
 
+static int currently_stepping (struct thread_info *tp);
+
 static int currently_stepping_or_nexting_callback (struct thread_info *tp,
 						   void *data);
 
@@ -4849,7 +4851,7 @@ infrun: not switching back to stepped thread, it has vanished\n");
 
 /* Is thread TP in the middle of single-stepping?  */
 
-int
+static int
 currently_stepping (struct thread_info *tp)
 {
   return ((tp->step_range_end && tp->step_resume_breakpoint == NULL)
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index f8de481..0e18034 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -1820,26 +1820,20 @@ resume_callback (struct lwp_info *lp, void *data)
     }
   else if (lp->stopped && lp->status == 0)
     {
-      struct thread_info *tp = find_thread_ptid (lp->ptid);
-      /* lp->step may already contain a stale value.  */
-      int step = tp ? currently_stepping (tp) : 0;
-
       if (debug_linux_nat)
 	fprintf_unfiltered (gdb_stdlog,
-			    "RC:  %s %s, 0, 0 (resuming sibling)\n",
-			    step ? "PTRACE_SINGLESTEP" : "PTRACE_CONT",
+			    "RC:  PTRACE_CONT %s, 0, 0 (resuming sibling)\n",
 			    target_pid_to_str (lp->ptid));
 
       linux_ops->to_resume (linux_ops,
 			    pid_to_ptid (GET_LWP (lp->ptid)),
-			    step, TARGET_SIGNAL_0);
+			    0, TARGET_SIGNAL_0);
       if (debug_linux_nat)
 	fprintf_unfiltered (gdb_stdlog,
-			    "RC:  %s %s, 0, 0 (resume sibling)\n",
-			    step ? "PTRACE_SINGLESTEP" : "PTRACE_CONT",
+			    "RC:  PTRACE_CONT %s, 0, 0 (resume sibling)\n",
 			    target_pid_to_str (lp->ptid));
       lp->stopped = 0;
-      lp->step = step;
+      lp->step = 0;
       memset (&lp->siginfo, 0, sizeof (lp->siginfo));
       lp->stopped_by_watchpoint = 0;
     }
diff --git a/gdb/remote.c b/gdb/remote.c
index 68e5678..a4860bc 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -4416,12 +4416,6 @@ append_resumption (char *p, char *endp,
   return p;
 }
 
-static int
-currently_stepping_callback (struct thread_info *tp, void *data)
-{
-  return currently_stepping (tp);
-}
-
 /* Resume the remote inferior by using a "vCont" packet.  The thread
    to be resumed is PTID; STEP and SIGGNAL indicate whether the
    resumed thread should be single-stepped and/or signalled.  If PTID
@@ -4464,8 +4458,6 @@ remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
     }
   else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
     {
-      struct thread_info *tp;
-
       /* Resume all threads (of all processes, or of a single
 	 process), with preference for INFERIOR_PTID.  This assumes
 	 inferior_ptid belongs to the set of all threads we are about
@@ -4476,12 +4468,6 @@ remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
 	  p = append_resumption (p, endp, inferior_ptid, step, siggnal);
 	}
 
-      tp = iterate_over_threads (currently_stepping_callback, NULL);
-      if (tp && !ptid_equal (tp->ptid, inferior_ptid))
-	{
-	  p = append_resumption (p, endp, tp->ptid, 1, TARGET_SIGNAL_0);
-	}
-
       /* And continue others without a signal.  */
       p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
     }
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 8c07761..c70d914 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2010-11-02  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Revert:
+	2010-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
+	* gdb.threads/sigstep-threads.exp: New file.
+	* gdb.threads/sigstep-threads.c: New file.
+
 2010-10-20  Michael Snyder  <msnyder@vmware.com>
 
 	* gdb.threads/fork-child-threads.exp: Don't run on remote target.
diff --git a/gdb/testsuite/gdb.threads/sigstep-threads.c b/gdb/testsuite/gdb.threads/sigstep-threads.c
deleted file mode 100644
index 7e04c32..0000000
--- a/gdb/testsuite/gdb.threads/sigstep-threads.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/* This testcase is part of GDB, the GNU debugger.
-
-   Copyright 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 <pthread.h>
-#include <assert.h>
-#include <signal.h>
-
-#include <asm/unistd.h>
-#include <unistd.h>
-#define tgkill(tgid, tid, sig) syscall (__NR_tgkill, (tgid), (tid), (sig))
-#define gettid() syscall (__NR_gettid)
-
-static volatile int var;
-
-static void
-handler (int signo)	/* step-0 */
-{			/* step-0 */
-  var++;		/* step-1 */
-  tgkill (getpid (), gettid (), SIGUSR1);	/* step-2 */
-}
-
-static void *
-start (void *arg)
-{
-  signal (SIGUSR1, handler);
-  tgkill (getpid (), gettid (), SIGUSR1);
-  assert (0);
-
-  return NULL;
-}
-
-int
-main (void)
-{
-  pthread_t thread;
-
-  pthread_create (&thread, NULL, start, NULL);
-  start (NULL);	/* main-start */
-  return 0;
-}
diff --git a/gdb/testsuite/gdb.threads/sigstep-threads.exp b/gdb/testsuite/gdb.threads/sigstep-threads.exp
deleted file mode 100644
index 5110706..0000000
--- a/gdb/testsuite/gdb.threads/sigstep-threads.exp
+++ /dev/null
@@ -1,74 +0,0 @@
-# Copyright 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 sigstep-threads
-set srcfile ${testfile}.c
-set executable ${testfile}
-set binfile ${objdir}/${subdir}/${executable}
-
-if { [gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
-    untested ${testfile}.exp
-    return -1
-}
-
-clean_restart $executable
-
-if ![runto_main] {
-    return -1;
-}
-
-# `noprint' would not test the full logic of GDB.
-gdb_test "handle SIGUSR1 nostop print pass" "\r\nSIGUSR1\[ \t\]+No\[ \t\]+Yes\[ \t\]+Yes\[ \t\].*"
-
-gdb_test_no_output "set scheduler-locking off"
-
-gdb_breakpoint [gdb_get_line_number "step-1"]
-gdb_test_no_output {set $step1=$bpnum}
-gdb_continue_to_breakpoint "step-1" ".* step-1 .*"
-gdb_test_no_output {disable $step1}
-
-# 1 as we are now stopped at the `step-1' label.
-set step_at 1
-for {set i 0} {$i < 100} {incr i} {
-    set test "step $i"
-    # Presume this step failed - as in the case of a timeout.
-    set failed 1
-    gdb_test_multiple "step" $test {
-	-re "\r\nProgram received signal SIGUSR1, User defined signal 1.\r\n" {
-	    exp_continue -continue_timer
-	}
-	-re "step-(\[012\]).*\r\n$gdb_prompt $" {
-	    set now $expect_out(1,string)
-	    if {$step_at == 2 && $now == 1} {
-		set failed 0
-	    } elseif {$step_at == 1 && $now == 2} {
-		set failed 0
-		# Continue over the re-signalling back to the handle entry.
-		gdb_test_no_output {enable $step1} ""
-		gdb_test "continue" " step-1 .*" ""
-		set now 1
-		gdb_test_no_output {disable $step1} ""
-	    } else  {
-		fail $test
-	    }
-	    set step_at $now
-	}
-    }
-    if $failed {
-	return
-    }
-}
-# We can never reliably say the racy problematic case has been tested.
-pass "step"