tests/plugin/empty.c

   1 /*
   2  * Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
   3  *
   4  * License: GNU GPL, version 2 or later.
   5  *   See the COPYING file in the top-level directory.
   6  */
   7 #include <inttypes.h>
   8 #include <assert.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13
  14 #include <qemu-plugin.h>
  15
  16 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
  17
  18 /*
  19  * Empty TB translation callback.
  20  * This allows us to measure the overhead of injecting and then
  21  * removing empty instrumentation.
  22  */
  23 static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
  24 { }
  25
  26 QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
  27                                            const qemu_info_t *info,
  28                                            int argc, char **argv)
  29 {
  30     qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
  31     return 0;
  32 }