Remove unused functions and declarations

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

diff --git a/gdb/fork-child.c b/gdb/fork-child.c
index d4403b8592323a834b5c47a15c20f2f1709886cf..15f82499db2f51c37bc472c7d67b5c399bd47a41 100644 (file)
--- a/gdb/fork-child.c
+++ b/gdb/fork-child.c
@@ -1,6 +1,6 @@
 /* Fork a Unix child process, and set up to debug it, for GDB.
 
-   Copyright (C) 1990-2014 Free Software Foundation, Inc.
+   Copyright (C) 1990-2016 Free Software Foundation, Inc.
 
    Contributed by Cygnus Support.
 
@@ -20,20 +20,19 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include <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 "top.h"
+#include "signals-state-save-restore.h"
 #include <signal.h>
 
 /* This just gets used as a default if we can't find SHELL.  */
@@ -143,6 +142,7 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
   struct inferior *inf;
   int i;
   int save_errno;
+  struct ui *save_ui;
 
   /* If no exec file handed to us, get it from the exec-file command
      -- with a good, common error message if none is specified.  */
@@ -172,7 +172,7 @@ 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]);
     }
@@ -277,6 +277,9 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
      restore it.  */
   save_our_env = environ;
 
+  /* Likewise the current UI.  */
+  save_ui = current_ui;
+
   /* Tell the terminal handling subsystem what tty we plan to run on;
      it will just record the information for later.  */
   new_tty_prefork (inferior_io_terminal);
@@ -284,8 +287,8 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
   /* It is generally good practice to flush any possible pending stdio
      output prior to doing a fork, to avoid the possibility of both
      the parent and child flushing the same data after the fork.  */
-  gdb_flush (gdb_stdout);
-  gdb_flush (gdb_stderr);
+  gdb_flush (main_ui->m_gdb_stdout);
+  gdb_flush (main_ui->m_gdb_stderr);
 
   /* If there's any initialization of the target layers that must
      happen to prepare to handle the child we're about fork, do it
@@ -314,6 +317,16 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
 
   if (pid == 0)
     {
+      /* Switch to the main UI, so that gdb_std{in/out/err} in the
+        child are mapped to std{in/out/err}.  This makes it possible
+        to use fprintf_unfiltered/warning/error/etc. in the child
+        from here on.  */
+      current_ui = main_ui;
+
+      /* Close all file descriptors except those that gdb inherited
+        (usually 0/1/2), so they don't leak to the inferior.  Note
+        that this closes the file descriptors of all secondary
+        UIs.  */
       close_most_fds ();
 
       if (debug_fork)
@@ -353,6 +366,8 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
         saying "not parent".  Sorry; you'll have to use print
         statements!  */
 
+      restore_original_signals_state ();
+
       /* There is no execlpe call, so we have to set the environment
          for our child in the global variable.  If we've vforked, this
          clobbers the parent, but environ is restored a few lines down
@@ -367,7 +382,7 @@ 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");
@@ -380,6 +395,9 @@ fork_inferior (char *exec_file_arg, char *allargs, char **env,
   /* Restore our environment in case a vforked child clob'd it.  */
   environ = save_our_env;
 
+  /* Likewise the current UI.  */
+  current_ui = save_ui;
+
   if (!have_inferiors ())
     init_thread_list ();
 
@@ -464,7 +482,7 @@ startup_inferior (int ntraps)
 
          case TARGET_WAITKIND_SIGNALLED:
            target_terminal_ours ();
-           target_mourn_inferior ();
+           target_mourn_inferior (event_ptid);
            error (_("During startup program terminated with signal %s, %s."),
                   gdb_signal_to_name (ws.value.sig),
                   gdb_signal_to_string (ws.value.sig));
@@ -472,7 +490,7 @@ startup_inferior (int ntraps)
 
          case TARGET_WAITKIND_EXITED:
            target_terminal_ours ();
-           target_mourn_inferior ();
+           target_mourn_inferior (event_ptid);
            if (ws.value.integer)
              error (_("During startup program exited with code %d."),
                     ws.value.integer);
@@ -496,7 +514,7 @@ startup_inferior (int ntraps)
       if (resume_signal != GDB_SIGNAL_TRAP)
        {
          /* Let shell child handle its own signals in its own way.  */
-         target_resume (resume_ptid, 0, resume_signal);
+         target_continue (resume_ptid, resume_signal);
        }
       else
        {
@@ -522,7 +540,7 @@ startup_inferior (int ntraps)
            break;
 
          /* Just make it go on.  */
-         target_resume (resume_ptid, 0, GDB_SIGNAL_0);
+         target_continue_no_signal (resume_ptid);
        }
     }