gdbserver: Move detach code to its own function

The code required to handle the 'D' packet is non trivial, so move it
out to its own function.

The moved out code is identical, except for the call to strtol and some
breaks that became returns.

Tested manually, and by running gdb.base/*detach*.exp with
native-gdbserver and native-extended-gdbserver.

gdb/gdbserver/ChangeLog:

	* server.c (handle_detach): New function.
	(process_serial_event): Move code out, call handle_detach.

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index d7980b0dbd96a22195223087e4c2d243b15f5ca2..144e09afa32e4e2efe5e9b83579d675f7dd3e3e4 100644 (file)
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-15  Simon Marchi  <simon.marchi@ericsson.com>
+
+       * server.c (handle_detach): New function.
+       (process_serial_event): Move code out, call handle_detach.
+
 2017-09-15  Simon Marchi  <simon.marchi@ericsson.com>
 
        * server.c (require_running): Rename to ...

diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 8e0bf5ba7890276927bab67b3b357bc5b0984552..3de7f163412a7825fe4abbdf3e8f94ddb024d3de 100644 (file)
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -1157,6 +1157,100 @@ handle_search_memory (char *own_buf, int packet_len)
   free (pattern);
 }
 
+/* Handle the "D" packet.  */
+
+static void
+handle_detach (char *own_buf)
+{
+  require_running_or_return (own_buf);
+
+  int pid;
+
+  if (multi_process)
+    {
+      /* skip 'D;' */
+      pid = strtol (&own_buf[2], NULL, 16);
+    }
+  else
+    pid = ptid_get_pid (current_ptid);
+
+  if ((tracing && disconnected_tracing) || any_persistent_commands ())
+    {
+      struct process_info *process = find_process_pid (pid);
+
+      if (process == NULL)
+       {
+         write_enn (own_buf);
+         return;
+       }
+
+      if (tracing && disconnected_tracing)
+       fprintf (stderr,
+                "Disconnected tracing in effect, "
+                "leaving gdbserver attached to the process\n");
+
+      if (any_persistent_commands ())
+       fprintf (stderr,
+                "Persistent commands are present, "
+                "leaving gdbserver attached to the process\n");
+
+      /* Make sure we're in non-stop/async mode, so we we can both
+        wait for an async socket accept, and handle async target
+        events simultaneously.  There's also no point either in
+        having the target stop all threads, when we're going to
+        pass signals down without informing GDB.  */
+      if (!non_stop)
+       {
+         if (debug_threads)
+           debug_printf ("Forcing non-stop mode\n");
+
+         non_stop = 1;
+         start_non_stop (1);
+       }
+
+      process->gdb_detached = 1;
+
+      /* Detaching implicitly resumes all threads.  */
+      target_continue_no_signal (minus_one_ptid);
+
+      write_ok (own_buf);
+      return;
+    }
+
+  fprintf (stderr, "Detaching from process %d\n", pid);
+  stop_tracing ();
+  if (detach_inferior (pid) != 0)
+    write_enn (own_buf);
+  else
+    {
+      discard_queued_stop_replies (pid_to_ptid (pid));
+      write_ok (own_buf);
+
+      if (extended_protocol || target_running ())
+       {
+         /* There is still at least one inferior remaining or
+            we are in extended mode, so don't terminate gdbserver,
+            and instead treat this like a normal program exit.  */
+         last_status.kind = TARGET_WAITKIND_EXITED;
+         last_status.value.integer = 0;
+         last_ptid = pid_to_ptid (pid);
+
+         current_thread = NULL;
+       }
+      else
+       {
+         putpkt (own_buf);
+         remote_close ();
+
+         /* If we are attached, then we can exit.  Otherwise, we
+            need to hang around doing nothing, until the child is
+            gone.  */
+         join_inferior (pid);
+         exit (0);
+       }
+    }
+}
+
 /* Parse options to --debug-format= and "monitor set debug-format".
    ARG is the text after "--debug-format=" or "monitor set debug-format".
    IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
@@ -4003,13 +4097,10 @@ process_point_options (struct gdb_breakpoint *bp, char **packet)
 static int
 process_serial_event (void)
 {
-  char ch;
-  int i = 0;
   int signal;
   unsigned int len;
   int res;
   CORE_ADDR mem_addr;
-  int pid;
   unsigned char sig;
   int packet_len;
   int new_packet_len = -1;
@@ -4026,8 +4117,7 @@ process_serial_event (void)
     }
   response_needed = 1;
 
-  i = 0;
-  ch = own_buf[i++];
+  char ch = own_buf[0];
   switch (ch)
     {
     case 'q':
@@ -4037,91 +4127,7 @@ process_serial_event (void)
       handle_general_set (own_buf);
       break;
     case 'D':
-      require_running_or_break (own_buf);
-
-      if (multi_process)
-       {
-         i++; /* skip ';' */
-         pid = strtol (&own_buf[i], NULL, 16);
-       }
-      else
-       pid = ptid_get_pid (current_ptid);
-
-      if ((tracing && disconnected_tracing) || any_persistent_commands ())
-       {
-         struct process_info *process = find_process_pid (pid);
-
-         if (process == NULL)
-           {
-             write_enn (own_buf);
-             break;
-           }
-
-         if (tracing && disconnected_tracing)
-           fprintf (stderr,
-                    "Disconnected tracing in effect, "
-                    "leaving gdbserver attached to the process\n");
-
-         if (any_persistent_commands ())
-           fprintf (stderr,
-                    "Persistent commands are present, "
-                    "leaving gdbserver attached to the process\n");
-
-         /* Make sure we're in non-stop/async mode, so we we can both
-            wait for an async socket accept, and handle async target
-            events simultaneously.  There's also no point either in
-            having the target stop all threads, when we're going to
-            pass signals down without informing GDB.  */
-         if (!non_stop)
-           {
-             if (debug_threads)
-               debug_printf ("Forcing non-stop mode\n");
-
-             non_stop = 1;
-             start_non_stop (1);
-           }
-
-         process->gdb_detached = 1;
-
-         /* Detaching implicitly resumes all threads.  */
-         target_continue_no_signal (minus_one_ptid);
-
-         write_ok (own_buf);
-         break; /* from switch/case */
-       }
-
-      fprintf (stderr, "Detaching from process %d\n", pid);
-      stop_tracing ();
-      if (detach_inferior (pid) != 0)
-       write_enn (own_buf);
-      else
-       {
-         discard_queued_stop_replies (pid_to_ptid (pid));
-         write_ok (own_buf);
-
-         if (extended_protocol || target_running ())
-           {
-             /* There is still at least one inferior remaining or
-                we are in extended mode, so don't terminate gdbserver,
-                and instead treat this like a normal program exit.  */
-             last_status.kind = TARGET_WAITKIND_EXITED;
-             last_status.value.integer = 0;
-             last_ptid = pid_to_ptid (pid);
-
-             current_thread = NULL;
-           }
-         else
-           {
-             putpkt (own_buf);
-             remote_close ();
-
-             /* If we are attached, then we can exit.  Otherwise, we
-                need to hang around doing nothing, until the child is
-                gone.  */
-             join_inferior (pid);
-             exit (0);
-           }
-       }
+      handle_detach (own_buf);
       break;
     case '!':
       extended_protocol = 1;