Add aarch64-*-rtems* target

[deliverable/binutils-gdb.git] / gdb / fork-child.c

diff --git a/gdb/fork-child.c b/gdb/fork-child.c
index b47019dcc00cfcbb2fb5cd2594e2faaadeef4dd1..204b7cf99157393b6cfa2d3e028222c691b093bf 100644 (file)
--- a/gdb/fork-child.c
+++ b/gdb/fork-child.c
@@ -1,7 +1,6 @@
 /* Fork a Unix child process, and set up to debug it, for GDB.
 
-   Copyright (C) 1990-1996, 1998-2001, 2004-2012 Free Software
-   Foundation, Inc.
+   Copyright (C) 1990-2016 Free Software Foundation, Inc.
 
    Contributed by Cygnus Support.
 
@@ -21,18 +20,17 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include "gdb_string.h"
 #include "inferior.h"
 #include "terminal.h"
 #include "target.h"
 #include "gdb_wait.h"
 #include "gdb_vfork.h"
 #include "gdbcore.h"
-#include "terminal.h"
 #include "gdbthread.h"
 #include "command.h" /* for dont_repeat () */
 #include "gdbcmd.h"
 #include "solib.h"
+#include "filestuff.h"
 
 #include <signal.h>
 
@@ -150,11 +148,11 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
   if (exec_file == 0)
     exec_file = get_exec_file (1);
 
-  /* STARTUP_WITH_SHELL is defined in inferior.h.  If 0,e we'll just
-    do a fork/exec, no shell, so don't bother figuring out what
-    shell.  */
+  /* 'startup_with_shell' is declared in inferior.h and bound to the
+     "set startup-with-shell" option.  If 0, we'll just do a
+     fork/exec, no shell, so don't bother figuring out what shell.  */
   shell_file = shell_file_arg;
-  if (STARTUP_WITH_SHELL)
+  if (startup_with_shell)
     {
       /* Figure out what shell to start up the user program under.  */
       if (shell_file == NULL)
@@ -172,7 +170,7 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
         argument.  */
       int argc = (strlen (allargs) + 1) / 2 + 2;
 
-      argv = (char **) alloca (argc * sizeof (*argv));
+      argv = XALLOCAVEC (char *, argc);
       argv[0] = exec_file;
       breakup_args (allargs, &argv[1]);
     }
@@ -314,6 +312,8 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
 
   if (pid == 0)
     {
+      close_most_fds ();
+
       if (debug_fork)
        sleep (debug_fork);
 
@@ -365,7 +365,7 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
 
       /* If we get here, it's an error.  */
       save_errno = errno;
-      fprintf_unfiltered (gdb_stderr, "Cannot exec %s", exec_file);
+      fprintf_unfiltered (gdb_stderr, "Cannot exec %s", argv[0]);
       for (i = 1; argv[i] != NULL; i++)
        fprintf_unfiltered (gdb_stderr, " %s", argv[i]);
       fprintf_unfiltered (gdb_stderr, ".\n");
@@ -417,6 +417,12 @@ startup_inferior (int ntraps)
   int terminal_initted = 0;
   ptid_t resume_ptid;
 
+  if (startup_with_shell)
+    {
+      /* One trap extra for exec'ing the shell.  */
+      pending_execs++;
+    }
+
   if (target_supports_multi_process ())
     resume_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
   else
@@ -531,6 +537,15 @@ unset_exec_wrapper_command (char *args, int from_tty)
   exec_wrapper = NULL;
 }
 
+static void
+show_startup_with_shell (struct ui_file *file, int from_tty,
+                        struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file,
+                   _("Use of shell to start subprocesses is %s.\n"),
+                   value);
+}
+
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 extern initialize_file_ftype _initialize_fork_child;
 
@@ -548,4 +563,12 @@ Show the wrapper for running programs."), NULL,
   add_cmd ("exec-wrapper", class_run, unset_exec_wrapper_command,
            _("Disable use of an execution wrapper."),
            &unsetlist);
+
+  add_setshow_boolean_cmd ("startup-with-shell", class_support,
+                          &startup_with_shell, _("\
+Set use of shell to start subprocesses.  The default is on."), _("\
+Show use of shell to start subprocesses."), NULL,
+                          NULL,
+                          show_startup_with_shell,
+                          &setlist, &showlist);
 }