[PATCH v4 18/44] gdbserver: improve threads debug output for process general thread

Setting the general thread to a process produces

    [threads] set_desired_thread: did not find thread for general_thread <pid>.0.0, but found process

Handle that case separately in set_desired_thread() and produce

    [threads] set_desired_thread: did not find process for general_thread <pid>.0.0

if no such process can be found.
---
 gdbserver/target.cc | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/gdbserver/target.cc b/gdbserver/target.cc
index 43ef421df74..d97d2334344 100644
--- a/gdbserver/target.cc
+++ b/gdbserver/target.cc
@@ -34,8 +34,20 @@ bool
 set_desired_thread ()
 {
   client_state &cs = get_client_state ();
-  thread_info *found = find_thread_ptid (cs.general_thread);
+  if (cs.general_thread.is_pid ())
+    {
+      process_info *proc = find_process_pid (cs.general_thread.pid ());
+      if (proc == nullptr)
+	{
+	  threads_debug_printf
+	    ("did not find process for general_thread %s",
+	     cs.general_thread.to_string ().c_str ());
+	}
+      switch_to_process (proc);
+      return false;
+    }
 
+  thread_info *found = find_thread_ptid (cs.general_thread);
   if (found == nullptr)
     {
       process_info *proc = find_process_pid (cs.general_thread.pid ());
-- 
2.43.0

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