tests/plugin/insn.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 #include <glib.h>
  14
  15 #include <qemu-plugin.h>
  16
  17 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
  18
  19 static uint64_t insn_count;
  20 static bool do_inline;
  21
  22 static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
  23 {
  24     insn_count++;
  25 }
  26
  27 static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
  28 {
  29     size_t n = qemu_plugin_tb_n_insns(tb);
  30     size_t i;
  31
  32     for (i = 0; i < n; i++) {
  33         struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
  34
  35         if (do_inline) {
  36             qemu_plugin_register_vcpu_insn_exec_inline(
  37                 insn, QEMU_PLUGIN_INLINE_ADD_U64, &insn_count, 1);
  38         } else {
  39             qemu_plugin_register_vcpu_insn_exec_cb(
  40                 insn, vcpu_insn_exec_before, QEMU_PLUGIN_CB_NO_REGS, NULL);
  41         }
  42     }
  43 }
  44
  45 static void plugin_exit(qemu_plugin_id_t id, void *p)
  46 {
  47     g_autofree gchar *out = g_strdup_printf("insns: %" PRIu64 "\n", insn_count);
  48     qemu_plugin_outs(out);
  49 }
  50
  51 QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
  52                                            const qemu_info_t *info,
  53                                            int argc, char **argv)
  54 {
  55     if (argc && !strcmp(argv[0], "inline")) {
  56         do_inline = true;
  57     }
  58
  59     qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
  60     qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
  61     return 0;
  62 }