124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/*
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* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <inttypes.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <glib.h>
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#include <qemu-plugin.h>
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QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
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static uint64_t inline_mem_count;
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static uint64_t cb_mem_count;
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static uint64_t io_count;
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static bool do_inline, do_callback;
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static bool do_haddr;
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static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
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static void plugin_exit(qemu_plugin_id_t id, void *p)
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{
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g_autoptr(GString) out = g_string_new("");
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if (do_inline) {
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g_string_printf(out, "inline mem accesses: %" PRIu64 "\n", inline_mem_count);
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}
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if (do_callback) {
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g_string_append_printf(out, "callback mem accesses: %" PRIu64 "\n", cb_mem_count);
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}
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if (do_haddr) {
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g_string_append_printf(out, "io accesses: %" PRIu64 "\n", io_count);
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}
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qemu_plugin_outs(out->str);
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}
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static void vcpu_mem(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo,
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uint64_t vaddr, void *udata)
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{
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if (do_haddr) {
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struct qemu_plugin_hwaddr *hwaddr;
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hwaddr = qemu_plugin_get_hwaddr(meminfo, vaddr);
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if (qemu_plugin_hwaddr_is_io(hwaddr)) {
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io_count++;
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} else {
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cb_mem_count++;
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}
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} else {
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cb_mem_count++;
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}
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}
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static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
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{
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size_t n = qemu_plugin_tb_n_insns(tb);
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size_t i;
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for (i = 0; i < n; i++) {
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struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
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if (do_inline) {
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qemu_plugin_register_vcpu_mem_inline(insn, rw,
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QEMU_PLUGIN_INLINE_ADD_U64,
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&inline_mem_count, 1);
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}
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if (do_callback) {
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qemu_plugin_register_vcpu_mem_cb(insn, vcpu_mem,
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QEMU_PLUGIN_CB_NO_REGS,
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rw, NULL);
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}
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}
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}
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QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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const qemu_info_t *info,
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int argc, char **argv)
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{
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for (int i = 0; i < argc; i++) {
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char *opt = argv[i];
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g_autofree char **tokens = g_strsplit(opt, "=", 2);
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if (g_strcmp0(tokens[0], "haddr") == 0) {
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if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_haddr)) {
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fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
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return -1;
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}
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} else if (g_strcmp0(tokens[0], "track") == 0) {
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if (g_strcmp0(tokens[1], "r") == 0) {
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rw = QEMU_PLUGIN_MEM_R;
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} else if (g_strcmp0(tokens[1], "w") == 0) {
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rw = QEMU_PLUGIN_MEM_W;
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} else if (g_strcmp0(tokens[1], "rw") == 0) {
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rw = QEMU_PLUGIN_MEM_RW;
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} else {
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fprintf(stderr, "invaild value for argument track: %s\n", opt);
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return -1;
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}
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} else if (g_strcmp0(tokens[0], "inline") == 0) {
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if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
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fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
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return -1;
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}
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} else if (g_strcmp0(tokens[0], "callback") == 0) {
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if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_callback)) {
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fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
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return -1;
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}
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} else {
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fprintf(stderr, "option parsing failed: %s\n", opt);
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return -1;
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}
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}
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qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
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return 0;
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}
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