gdb/

	* 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/
	* gdb.threads/sigstep-threads.exp: New file.
	* gdb.threads/sigstep-threads.c: New file.

1 files changed, 54 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.threads/sigstep-threads.c b/gdb/testsuite/gdb.threads/sigstep-threads.c
new file mode 100644
index 0000000..7e04c32
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/sigstep-threads.c
@@ -0,0 +1,54 @@
+/* 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;
+}