Implement pid_to_exec_file for Windows in gdbserver

I noticed that gdbserver did not implement pid_to_exec_file for
Windows, while gdb did implement it.  This patch moves the code to
nat/windows-nat.c, so that it can be shared.  This makes the gdbserver
implementation trivial.

1 files changed, 14 insertions, 0 deletions

diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h
index 9f7f8b6..450ba69 100644
--- a/gdb/nat/windows-nat.h
+++ b/gdb/nat/windows-nat.h
@@ -248,6 +248,8 @@ struct windows_process_info
 
   gdb::optional<pending_stop> fetch_pending_stop (bool debug_events);
 
+  const char *pid_to_exec_file (int);
+
 private:
 
   /* Handle MS_VC_EXCEPTION when processing a stop.  MS_VC_EXCEPTION is
@@ -266,6 +268,18 @@ private:
      presumed loaded.  */
 
   void add_dll (LPVOID load_addr);
+
+  /* Try to determine the executable filename.
+
+     EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
+
+     Upon success, the filename is stored inside EXE_NAME_RET, and
+     this function returns nonzero.
+
+     Otherwise, this function returns zero and the contents of
+     EXE_NAME_RET is undefined.  */
+
+  int get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len);
 };
 
 /* A simple wrapper for ContinueDebugEvent that continues the last