1 files changed, 140 insertions, 0 deletions
diff --git a/gdbserver/debug.cc b/gdbserver/debug.cc
new file mode 100644
index 0000000..7bb2504
--- /dev/null
+++ b/gdbserver/debug.cc
@@ -0,0 +1,140 @@
+/* Debugging routines for the remote server for GDB.
+   Copyright (C) 2014-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "server.h"
+#include <chrono>
+
+#if !defined (IN_PROCESS_AGENT)
+int remote_debug = 0;
+#endif
+
+/* Output file for debugging.  Default to standard error.  */
+FILE *debug_file = stderr;
+
+/* See debug.h.  */
+int debug_threads;
+
+/* Include timestamps in debugging output.  */
+int debug_timestamp;
+
+#if !defined (IN_PROCESS_AGENT)
+
+/* See debug.h.  */
+
+void
+debug_set_output (const char *new_debug_file)
+{
+  /* Close any existing file and reset to standard error.  */
+  if (debug_file != stderr)
+    {
+      fclose (debug_file);
+    }
+  debug_file = stderr;
+
+  /* Catch empty filenames.  */
+  if (new_debug_file == nullptr || strlen (new_debug_file) == 0)
+    return;
+
+  FILE *fptr = fopen (new_debug_file, "w");
+
+  if (fptr == nullptr)
+    {
+      debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n",
+		    new_debug_file, safe_strerror (errno));
+      return;
+    }
+
+  debug_file = fptr;
+}
+
+#endif
+
+/* Print a debugging message.
+   If the text begins a new line it is preceded by a timestamp.
+   We don't get fancy with newline checking, we just check whether the
+   previous call ended with "\n".  */
+
+void
+debug_vprintf (const char *format, va_list ap)
+{
+#if !defined (IN_PROCESS_AGENT)
+  /* N.B. Not thread safe, and can't be used, as is, with IPA.  */
+  static int new_line = 1;
+
+  if (debug_timestamp && new_line)
+    {
+      using namespace std::chrono;
+
+      steady_clock::time_point now = steady_clock::now ();
+      seconds s = duration_cast<seconds> (now.time_since_epoch ());
+      microseconds us = duration_cast<microseconds> (now.time_since_epoch ()) - s;
+
+      fprintf (debug_file, "%ld.%06ld ", (long) s.count (), (long) us.count ());
+    }
+#endif
+
+  vfprintf (debug_file, format, ap);
+
+#if !defined (IN_PROCESS_AGENT)
+  if (*format)
+    new_line = format[strlen (format) - 1] == '\n';
+#endif
+}
+
+/* Flush debugging output.
+   This is called, for example, when starting an inferior to ensure all debug
+   output thus far appears before any inferior output.  */
+
+void
+debug_flush (void)
+{
+  fflush (debug_file);
+}
+
+/* Notify the user that the code is entering FUNCTION_NAME.
+   FUNCTION_NAME is the name of the calling function, or NULL if unknown.
+
+   This is intended to be called via the debug_enter macro.  */
+
+void
+do_debug_enter (const char *function_name)
+{
+  if (function_name != NULL)
+    debug_printf (">>>> entering %s\n", function_name);
+}
+
+/* Notify the user that the code is exiting FUNCTION_NAME.
+   FUNCTION_NAME is the name of the calling function, or NULL if unknown.
+
+   This is intended to be called via the debug_exit macro.  */
+
+void
+do_debug_exit (const char *function_name)
+{
+  if (function_name != NULL)
+    debug_printf ("<<<< exiting %s\n", function_name);
+}
+
+/* See debug.h.  */
+
+ssize_t
+debug_write (const void *buf, size_t nbyte)
+{
+  int fd = fileno (debug_file);
+  return write (fd, buf, nbyte);
+}