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
  17 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
  18
  19 static uint64_t bb_count;
  20 static uint64_t insn_count;
  21 static bool do_inline;
  22
  23 static 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
  31 static 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
  39 static 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
  55 QEMU_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 }