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/*
* replay-char.c
*
* Copyright (c) 2010-2016 Institute for System Programming
* of the Russian Academy of Sciences.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "sysemu/replay.h"
#include "replay-internal.h"
#include "sysemu/sysemu.h"
#include "chardev/char.h"
/* Char drivers that generate qemu_chr_be_write events
that should be saved into the log. */
static Chardev **char_drivers;
static int drivers_count;
/* Char event attributes. */
typedef struct CharEvent {
int id;
uint8_t *buf;
size_t len;
} CharEvent;
static int find_char_driver(Chardev *chr)
{
int i = 0;
for ( ; i < drivers_count ; ++i) {
if (char_drivers[i] == chr) {
return i;
}
}
return -1;
}
void replay_register_char_driver(Chardev *chr)
{
if (replay_mode == REPLAY_MODE_NONE) {
return;
}
char_drivers = g_realloc(char_drivers,
sizeof(*char_drivers) * (drivers_count + 1));
char_drivers[drivers_count++] = chr;
}
void replay_chr_be_write(Chardev *s, uint8_t *buf, int len)
{
CharEvent *event = g_malloc0(sizeof(CharEvent));
event->id = find_char_driver(s);
if (event->id < 0) {
fprintf(stderr, "Replay: cannot find char driver\n");
exit(1);
}
event->buf = g_malloc(len);
memcpy(event->buf, buf, len);
event->len = len;
replay_add_event(REPLAY_ASYNC_EVENT_CHAR_READ, event, NULL, 0);
}
void replay_event_char_read_run(void *opaque)
{
CharEvent *event = (CharEvent *)opaque;
qemu_chr_be_write_impl(char_drivers[event->id], event->buf,
(int)event->len);
g_free(event->buf);
g_free(event);
}
void replay_event_char_read_save(void *opaque)
{
CharEvent *event = (CharEvent *)opaque;
replay_put_byte(event->id);
replay_put_array(event->buf, event->len);
}
void *replay_event_char_read_load(void)
{
CharEvent *event = g_malloc0(sizeof(CharEvent));
event->id = replay_get_byte();
replay_get_array_alloc(&event->buf, &event->len);
return event;
}
void replay_char_write_event_save(int res, int offset)
{
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_WRITE);
replay_put_dword(res);
replay_put_dword(offset);
replay_mutex_unlock();
}
void replay_char_write_event_load(int *res, int *offset)
{
replay_account_executed_instructions();
replay_mutex_lock();
if (replay_next_event_is(EVENT_CHAR_WRITE)) {
*res = replay_get_dword();
*offset = replay_get_dword();
replay_finish_event();
replay_mutex_unlock();
} else {
replay_mutex_unlock();
error_report("Missing character write event in the replay log");
exit(1);
}
}
int replay_char_read_all_load(uint8_t *buf)
{
replay_mutex_lock();
if (replay_next_event_is(EVENT_CHAR_READ_ALL)) {
size_t size;
int res;
replay_get_array(buf, &size);
replay_finish_event();
replay_mutex_unlock();
res = (int)size;
assert(res >= 0);
return res;
} else if (replay_next_event_is(EVENT_CHAR_READ_ALL_ERROR)) {
int res = replay_get_dword();
replay_finish_event();
replay_mutex_unlock();
return res;
} else {
replay_mutex_unlock();
error_report("Missing character read all event in the replay log");
exit(1);
}
}
void replay_char_read_all_save_error(int res)
{
assert(res < 0);
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_READ_ALL_ERROR);
replay_put_dword(res);
replay_mutex_unlock();
}
void replay_char_read_all_save_buf(uint8_t *buf, int offset)
{
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_CHAR_READ_ALL);
replay_put_array(buf, offset);
replay_mutex_unlock();
}
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