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tcg plugins: expose an API version concept
[thirdparty/qemu.git] / 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", mem_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 }