* Makefile.in (symfile.o): Update.

	* NEWS: Mention exec tracing support.
	* inf-ttrace.c (inf_ttrace_wait): Return TARGET_WAITKIND_EXECD for
	exec events.
	* infcmd.c (kill_if_already_running, detach_command)
	(disconnect_command): Replace SOLIB_RESTART with no_shared_libraries.
	* infrun.c (MAY_FOLLOW_EXEC, may_follow_exec): Delete.
	(follow_exec): Do not check may_follow_exec.  Do not mourn and push
	targets.  Apply the sysroot path to the loaded executable.  Use
	no_shared_libraries.
	* linux-nat.c (linux_child_follow_fork): Print fork following
	messages if verbose.
	(kill_wait_callback): Kill again before waiting a second time.
	* symfile.c (symbol_file_clear): Replace SOLIB_RESTART with
	no_shared_libraries.

	* gdb.base/foll-exec.exp: Update header.  Skip on remote targets.
	Run on GNU/Linux.
	(do_exec_tests): Check for systems which do not support catchpoints.
	Do not match START.
	* gdb.base/foll-fork.exp: Update header.  Skip on remote targets.
	Run on GNU/Linux.  Enable verbose output.
	(check_fork_catchpoints): New.
	(explicit_fork_child_follow, catch_fork_child_follow)
	(tcatch_fork_parent_follow): Update expected messages.
	(do_fork_tests): Use check_fork_catchpoints.
	* gdb.base/foll-vfork.exp: Update header.  Skip on remote targets.
	Run on GNU/Linux.  Enable verbose output.
	(check_vfork_catchpoints): New.
	(vfork_parent_follow_to_bp, tcatch_vfork_then_child_follow): Update
	expected messages.
	(do_vfork_and_exec_tests): Use check_fork_catchpoints.

1 files changed, 20 insertions, 10 deletions

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 4f75ad9..b021db4 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -383,7 +383,7 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
       /* Detach new forked process?  */
       if (detach_fork)
 	{
-	  if (debug_linux_nat)
+	  if (info_verbose || debug_linux_nat)
 	    {
 	      target_terminal_ours ();
 	      fprintf_filtered (gdb_stdlog,
@@ -468,7 +468,7 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
       /* Before detaching from the parent, remove all breakpoints from it. */
       remove_breakpoints ();
 
-      if (debug_linux_nat)
+      if (info_verbose || debug_linux_nat)
 	{
 	  target_terminal_ours ();
 	  fprintf_filtered (gdb_stdlog,
@@ -2348,11 +2348,18 @@ kill_wait_callback (struct lwp_info *lp, void *data)
       do
 	{
 	  pid = my_waitpid (GET_LWP (lp->ptid), NULL, __WCLONE);
-	  if (pid != (pid_t) -1 && debug_linux_nat)
+	  if (pid != (pid_t) -1)
 	    {
-	      fprintf_unfiltered (gdb_stdlog,
-				  "KWC: wait %s received unknown.\n",
-				  target_pid_to_str (lp->ptid));
+	      if (debug_linux_nat)
+		fprintf_unfiltered (gdb_stdlog,
+				    "KWC: wait %s received unknown.\n",
+				    target_pid_to_str (lp->ptid));
+	      /* The Linux kernel sometimes fails to kill a thread
+		 completely after PTRACE_KILL; that goes from the stop
+		 point in do_fork out to the one in
+		 get_signal_to_deliever and waits again.  So kill it
+		 again.  */
+	      kill_callback (lp, NULL);
 	    }
 	}
       while (pid == GET_LWP (lp->ptid));
@@ -2363,11 +2370,14 @@ kill_wait_callback (struct lwp_info *lp, void *data)
   do
     {
       pid = my_waitpid (GET_LWP (lp->ptid), NULL, 0);
-      if (pid != (pid_t) -1 && debug_linux_nat)
+      if (pid != (pid_t) -1)
 	{
-	  fprintf_unfiltered (gdb_stdlog,
-			      "KWC: wait %s received unk.\n",
-			      target_pid_to_str (lp->ptid));
+	  if (debug_linux_nat)
+	    fprintf_unfiltered (gdb_stdlog,
+				"KWC: wait %s received unk.\n",
+				target_pid_to_str (lp->ptid));
+	  /* See the call to kill_callback above.  */
+	  kill_callback (lp, NULL);
 	}
     }
   while (pid == GET_LWP (lp->ptid));