116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
|
|
*
|
|
* License: GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
#include <inttypes.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <glib.h>
|
|
|
|
#include <qemu-plugin.h>
|
|
|
|
QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
|
|
|
|
static uint64_t insn_count;
|
|
static bool do_inline;
|
|
static bool do_size;
|
|
static GArray *sizes;
|
|
|
|
static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
|
|
{
|
|
static uint64_t last_pc;
|
|
uint64_t this_pc = GPOINTER_TO_UINT(udata);
|
|
if (this_pc == last_pc) {
|
|
g_autofree gchar *out = g_strdup_printf("detected repeat execution @ 0x%"
|
|
PRIx64 "\n", this_pc);
|
|
qemu_plugin_outs(out);
|
|
}
|
|
last_pc = this_pc;
|
|
insn_count++;
|
|
}
|
|
|
|
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
|
|
{
|
|
size_t n = qemu_plugin_tb_n_insns(tb);
|
|
size_t i;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
|
|
|
|
if (do_inline) {
|
|
qemu_plugin_register_vcpu_insn_exec_inline(
|
|
insn, QEMU_PLUGIN_INLINE_ADD_U64, &insn_count, 1);
|
|
} else {
|
|
uint64_t vaddr = qemu_plugin_insn_vaddr(insn);
|
|
qemu_plugin_register_vcpu_insn_exec_cb(
|
|
insn, vcpu_insn_exec_before, QEMU_PLUGIN_CB_NO_REGS,
|
|
GUINT_TO_POINTER(vaddr));
|
|
}
|
|
|
|
if (do_size) {
|
|
size_t sz = qemu_plugin_insn_size(insn);
|
|
if (sz > sizes->len) {
|
|
g_array_set_size(sizes, sz);
|
|
}
|
|
unsigned long *cnt = &g_array_index(sizes, unsigned long, sz);
|
|
(*cnt)++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void plugin_exit(qemu_plugin_id_t id, void *p)
|
|
{
|
|
g_autoptr(GString) out = g_string_new(NULL);
|
|
|
|
if (do_size) {
|
|
int i;
|
|
for (i = 0; i <= sizes->len; i++) {
|
|
unsigned long *cnt = &g_array_index(sizes, unsigned long, i);
|
|
if (*cnt) {
|
|
g_string_append_printf(out,
|
|
"len %d bytes: %ld insns\n", i, *cnt);
|
|
}
|
|
}
|
|
} else {
|
|
g_string_append_printf(out, "insns: %" PRIu64 "\n", insn_count);
|
|
}
|
|
qemu_plugin_outs(out->str);
|
|
}
|
|
|
|
QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
|
|
const qemu_info_t *info,
|
|
int argc, char **argv)
|
|
{
|
|
for (int i = 0; i < argc; i++) {
|
|
char *opt = argv[i];
|
|
g_autofree char **tokens = g_strsplit(opt, "=", 2);
|
|
if (g_strcmp0(tokens[0], "inline") == 0) {
|
|
if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
|
|
fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
|
|
return -1;
|
|
}
|
|
} else if (g_strcmp0(tokens[0], "sizes") == 0) {
|
|
if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_size)) {
|
|
fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
|
|
return -1;
|
|
}
|
|
} else {
|
|
fprintf(stderr, "option parsing failed: %s\n", opt);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (do_size) {
|
|
sizes = g_array_new(true, true, sizeof(unsigned long));
|
|
}
|
|
|
|
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
|
|
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
|
|
return 0;
|
|
}
|