LXR qemu/tests/plugin/mem.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 mem_count;
  20static uint64_t io_count;
  21static bool do_inline;
  22static bool do_haddr;
  23static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
  24
  25static void plugin_exit(qemu_plugin_id_t id, void *p)
  26{
  27    g_autoptr(GString) out = g_string_new("");
  28
  29    g_string_printf(out, "mem accesses: %" PRIu64 "\n", mem_count);
  30    if (do_haddr) {
  31        g_string_append_printf(out, "io accesses: %" PRIu64 "\n", mem_count);
  32    }
  33    qemu_plugin_outs(out->str);
  34}
  35
  36static void vcpu_mem(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo,
  37                     uint64_t vaddr, void *udata)
  38{
  39    if (do_haddr) {
  40        struct qemu_plugin_hwaddr *hwaddr;
  41        hwaddr = qemu_plugin_get_hwaddr(meminfo, vaddr);
  42        if (qemu_plugin_hwaddr_is_io(hwaddr)) {
  43            io_count++;
  44        } else {
  45            mem_count++;
  46        }
  47    } else {
  48        mem_count++;
  49    }
  50}
  51
  52static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
  53{
  54    size_t n = qemu_plugin_tb_n_insns(tb);
  55    size_t i;
  56
  57    for (i = 0; i < n; i++) {
  58        struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
  59
  60        if (do_inline) {
  61            qemu_plugin_register_vcpu_mem_inline(insn, rw,
  62                                                 QEMU_PLUGIN_INLINE_ADD_U64,
  63                                                 &mem_count, 1);
  64        } else {
  65            qemu_plugin_register_vcpu_mem_cb(insn, vcpu_mem,
  66                                             QEMU_PLUGIN_CB_NO_REGS,
  67                                             rw, NULL);
  68        }
  69    }
  70}
  71
  72QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
  73                                           const qemu_info_t *info,
  74                                           int argc, char **argv)
  75{
  76    if (argc) {
  77        if (argc >= 3) {
  78            if (!strcmp(argv[2], "haddr")) {
  79                do_haddr = true;
  80            }
  81        }
  82        if (argc >= 2) {
  83            const char *str = argv[1];
  84
  85            if (!strcmp(str, "r")) {
  86                rw = QEMU_PLUGIN_MEM_R;
  87            } else if (!strcmp(str, "w")) {
  88                rw = QEMU_PLUGIN_MEM_W;
  89            }
  90        }
  91        if (!strcmp(argv[0], "inline")) {
  92            do_inline = true;
  93        }
  94    }
  95
  96    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
  97    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
  98    return 0;
  99}
 100