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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 insn_count;
20static bool do_inline;
21static bool do_size;
22static GArray *sizes;
23
24static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
25{
26 static uint64_t last_pc;
27 uint64_t this_pc = GPOINTER_TO_UINT(udata);
28 if (this_pc == last_pc) {
29 g_autofree gchar *out = g_strdup_printf("detected repeat execution @ 0x%"
30 PRIx64 "\n", this_pc);
31 qemu_plugin_outs(out);
32 }
33 last_pc = this_pc;
34 insn_count++;
35}
36
37static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
38{
39 size_t n = qemu_plugin_tb_n_insns(tb);
40 size_t i;
41
42 for (i = 0; i < n; i++) {
43 struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
44
45 if (do_inline) {
46 qemu_plugin_register_vcpu_insn_exec_inline(
47 insn, QEMU_PLUGIN_INLINE_ADD_U64, &insn_count, 1);
48 } else {
49 uint64_t vaddr = qemu_plugin_insn_vaddr(insn);
50 qemu_plugin_register_vcpu_insn_exec_cb(
51 insn, vcpu_insn_exec_before, QEMU_PLUGIN_CB_NO_REGS,
52 GUINT_TO_POINTER(vaddr));
53 }
54
55 if (do_size) {
56 size_t sz = qemu_plugin_insn_size(insn);
57 if (sz > sizes->len) {
58 g_array_set_size(sizes, sz);
59 }
60 unsigned long *cnt = &g_array_index(sizes, unsigned long, sz);
61 (*cnt)++;
62 }
63 }
64}
65
66static void plugin_exit(qemu_plugin_id_t id, void *p)
67{
68 g_autoptr(GString) out = g_string_new(NULL);
69
70 if (do_size) {
71 int i;
72 for (i = 0; i <= sizes->len; i++) {
73 unsigned long *cnt = &g_array_index(sizes, unsigned long, i);
74 if (*cnt) {
75 g_string_append_printf(out,
76 "len %d bytes: %ld insns\n", i, *cnt);
77 }
78 }
79 } else {
80 g_string_append_printf(out, "insns: %" PRIu64 "\n", insn_count);
81 }
82 qemu_plugin_outs(out->str);
83}
84
85QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
86 const qemu_info_t *info,
87 int argc, char **argv)
88{
89 for (int i = 0; i < argc; i++) {
90 char *opt = argv[i];
91 g_autofree char **tokens = g_strsplit(opt, "=", 2);
92 if (g_strcmp0(tokens[0], "inline") == 0) {
93 if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
94 fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
95 return -1;
96 }
97 } else if (g_strcmp0(tokens[0], "sizes") == 0) {
98 if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_size)) {
99 fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
100 return -1;
101 }
102 } else {
103 fprintf(stderr, "option parsing failed: %s\n", opt);
104 return -1;
105 }
106 }
107
108 if (do_size) {
109 sizes = g_array_new(true, true, sizeof(unsigned long));
110 }
111
112 qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
113 qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
114 return 0;
115}
116
