qemu-e2k/tests/plugin/insn.c

83 lines
2.4 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 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));
}
}
}
static void plugin_exit(qemu_plugin_id_t id, void *p)
{
g_autofree gchar *out = g_strdup_printf("insns: %" PRIu64 "\n", insn_count);
qemu_plugin_outs(out);
}
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 {
fprintf(stderr, "option parsing failed: %s\n", opt);
return -1;
}
}
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
return 0;
}