LXR qemu/tests/plugin/bb.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 bb_count;
  20static uint64_t insn_count;
  21static bool do_inline;
  22
  23static void plugin_exit(qemu_plugin_id_t id, void *p)
  24{
  25    g_autofree gchar *out;
  26    out = g_strdup_printf("bb's: %" PRIu64", insns: %" PRIu64 "\n",
  27                          bb_count, insn_count);
  28    qemu_plugin_outs(out);
  29}
  30
  31static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
  32{
  33    unsigned long n_insns = (unsigned long)udata;
  34
  35    insn_count += n_insns;
  36    bb_count++;
  37}
  38
  39static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
  40{
  41    unsigned long n_insns = qemu_plugin_tb_n_insns(tb);
  42
  43    if (do_inline) {
  44        qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
  45                                                 &bb_count, 1);
  46        qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
  47                                                 &insn_count, n_insns);
  48    } else {
  49        qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
  50                                             QEMU_PLUGIN_CB_NO_REGS,
  51                                             (void *)n_insns);
  52    }
  53}
  54
  55QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
  56                                           const qemu_info_t *info,
  57                                           int argc, char **argv)
  58{
  59    if (argc && strcmp(argv[0], "inline") == 0) {
  60        do_inline = true;
  61    }
  62
  63    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
  64    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
  65    return 0;
  66}
  67