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
  17 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
  18
  19 static uint64_t mem_count;
  20 static uint64_t io_count;
  21 static bool do_inline;
  22 static bool do_haddr;
  23 static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
  24
  25 static 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", io_count);
  32     }
  33     qemu_plugin_outs(out->str);
  34 }
  35
  36 static 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
  52 static 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
  72 QEMU_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 }