change delegation for to_read_description

[deliverable/binutils-gdb.git] / gdb / gdbserver / lynx-low.c

diff --git a/gdb/gdbserver/lynx-low.c b/gdb/gdbserver/lynx-low.c
index 3dbffa5eb91260c95ea436e2ceb0e67c2a9fd0bc..ce3ff6e6214a1ef030bd84a5d0ded969a4a39011 100644 (file)
--- a/gdb/gdbserver/lynx-low.c
+++ b/gdb/gdbserver/lynx-low.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2009-2013 Free Software Foundation, Inc.
+/* Copyright (C) 2009-2014 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -27,9 +27,12 @@
 #include <sys/types.h>
 #include "gdb_wait.h"
 #include <signal.h>
+#include "filestuff.h"
 
 int using_threads = 1;
 
+const struct target_desc *lynx_tdesc;
+
 /* Per-process private data.  */
 
 struct process_info_private
@@ -214,6 +217,7 @@ lynx_add_process (int pid, int attached)
   struct process_info *proc;
 
   proc = add_process (pid, attached);
+  proc->tdesc = lynx_tdesc;
   proc->private = xcalloc (1, sizeof (*proc->private));
   proc->private->last_wait_event_ptid = null_ptid;
 
@@ -237,6 +241,8 @@ lynx_create_inferior (char *program, char **allargs)
     {
       int pgrp;
 
+      close_most_fds ();
+
       /* Switch child to its own process group so that signals won't
          directly affect gdbserver. */
       pgrp = getpid();
@@ -256,6 +262,42 @@ lynx_create_inferior (char *program, char **allargs)
   return pid;
 }
 
+/* Assuming we've just attached to a running inferior whose pid is PID,
+   add all threads running in that process.  */
+
+static void
+lynx_add_threads_after_attach (int pid)
+{
+  /* Ugh!  There appears to be no way to get the list of threads
+     in the program we just attached to.  So get the list by calling
+     the "ps" command.  This is only needed now, as we will then
+     keep the thread list up to date thanks to thread creation and
+     exit notifications.  */
+  FILE *f;
+  char buf[256];
+  int thread_pid, thread_tid;
+
+  f = popen ("ps atx", "r");
+  if (f == NULL)
+    perror_with_name ("Cannot get thread list");
+
+  while (fgets (buf, sizeof (buf), f) != NULL)
+    if ((sscanf (buf, "%d %d", &thread_pid, &thread_tid) == 2
+        && thread_pid == pid))
+    {
+      ptid_t thread_ptid = lynx_ptid_build (pid, thread_tid);
+
+      if (!find_thread_ptid (thread_ptid))
+       {
+         lynx_debug ("New thread: (pid = %d, tid = %d)",
+                     pid, thread_tid);
+         add_thread (thread_ptid, NULL);
+       }
+    }
+
+  pclose (f);
+}
+
 /* Implement the attach target_ops method.  */
 
 static int
@@ -268,7 +310,7 @@ lynx_attach (unsigned long pid)
           strerror (errno), errno);
 
   lynx_add_process (pid, 1);
-  add_thread (ptid, NULL);
+  lynx_add_threads_after_attach (pid);
 
   return 0;
 }