LXR qemu/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
  17QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
  18
  19static uint64_t insn_count;
  20static bool do_inline;
  21
  22static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
  23{
  24    insn_count++;
  25}
  26
  27static 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
  45static void plugin_exit(qemu_plugin_id_t id, void *p)
  46{
  47    g_autofree gchar *out;
  48    out = g_strdup_printf("insns: %" PRIu64 "\n", insn_count);
  49    qemu_plugin_outs(out);
  50}
  51
  52QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
  53                                           const qemu_info_t *info,
  54                                           int argc, char **argv)
  55{
  56    if (argc && !strcmp(argv[0], "inline")) {
  57        do_inline = true;
  58    }
  59
  60    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
  61    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
  62    return 0;
  63}
  64