configure: fix --meson=/path/to/meson
[qemu.git] / replay / replay-char.c
1 /*
2 * replay-char.c
3 *
4 * Copyright (c) 2010-2016 Institute for System Programming
5 * of the Russian Academy of Sciences.
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
9 *
10 */
11
12 #include "qemu/osdep.h"
13 #include "qemu/error-report.h"
14 #include "sysemu/replay.h"
15 #include "replay-internal.h"
16 #include "chardev/char.h"
17
18 /* Char drivers that generate qemu_chr_be_write events
19 that should be saved into the log. */
20 static Chardev **char_drivers;
21 static int drivers_count;
22
23 /* Char event attributes. */
24 typedef struct CharEvent {
25 int id;
26 uint8_t *buf;
27 size_t len;
28 } CharEvent;
29
30 static int find_char_driver(Chardev *chr)
31 {
32 int i = 0;
33 for ( ; i < drivers_count ; ++i) {
34 if (char_drivers[i] == chr) {
35 return i;
36 }
37 }
38 return -1;
39 }
40
41 void replay_register_char_driver(Chardev *chr)
42 {
43 if (replay_mode == REPLAY_MODE_NONE) {
44 return;
45 }
46 char_drivers = g_realloc(char_drivers,
47 sizeof(*char_drivers) * (drivers_count + 1));
48 char_drivers[drivers_count++] = chr;
49 }
50
51 void replay_chr_be_write(Chardev *s, uint8_t *buf, int len)
52 {
53 CharEvent *event = g_malloc0(sizeof(CharEvent));
54
55 event->id = find_char_driver(s);
56 if (event->id < 0) {
57 fprintf(stderr, "Replay: cannot find char driver\n");
58 exit(1);
59 }
60 event->buf = g_malloc(len);
61 memcpy(event->buf, buf, len);
62 event->len = len;
63
64 replay_add_event(REPLAY_ASYNC_EVENT_CHAR_READ, event, NULL, 0);
65 }
66
67 void replay_event_char_read_run(void *opaque)
68 {
69 CharEvent *event = (CharEvent *)opaque;
70
71 qemu_chr_be_write_impl(char_drivers[event->id], event->buf,
72 (int)event->len);
73
74 g_free(event->buf);
75 g_free(event);
76 }
77
78 void replay_event_char_read_save(void *opaque)
79 {
80 CharEvent *event = (CharEvent *)opaque;
81
82 replay_put_byte(event->id);
83 replay_put_array(event->buf, event->len);
84 }
85
86 void *replay_event_char_read_load(void)
87 {
88 CharEvent *event = g_malloc0(sizeof(CharEvent));
89
90 event->id = replay_get_byte();
91 replay_get_array_alloc(&event->buf, &event->len);
92
93 return event;
94 }
95
96 void replay_char_write_event_save(int res, int offset)
97 {
98 g_assert(replay_mutex_locked());
99
100 replay_save_instructions();
101 replay_put_event(EVENT_CHAR_WRITE);
102 replay_put_dword(res);
103 replay_put_dword(offset);
104 }
105
106 void replay_char_write_event_load(int *res, int *offset)
107 {
108 g_assert(replay_mutex_locked());
109
110 replay_account_executed_instructions();
111 if (replay_next_event_is(EVENT_CHAR_WRITE)) {
112 *res = replay_get_dword();
113 *offset = replay_get_dword();
114 replay_finish_event();
115 } else {
116 error_report("Missing character write event in the replay log");
117 exit(1);
118 }
119 }
120
121 int replay_char_read_all_load(uint8_t *buf)
122 {
123 g_assert(replay_mutex_locked());
124
125 if (replay_next_event_is(EVENT_CHAR_READ_ALL)) {
126 size_t size;
127 int res;
128 replay_get_array(buf, &size);
129 replay_finish_event();
130 res = (int)size;
131 assert(res >= 0);
132 return res;
133 } else if (replay_next_event_is(EVENT_CHAR_READ_ALL_ERROR)) {
134 int res = replay_get_dword();
135 replay_finish_event();
136 return res;
137 } else {
138 error_report("Missing character read all event in the replay log");
139 exit(1);
140 }
141 }
142
143 void replay_char_read_all_save_error(int res)
144 {
145 g_assert(replay_mutex_locked());
146 assert(res < 0);
147 replay_save_instructions();
148 replay_put_event(EVENT_CHAR_READ_ALL_ERROR);
149 replay_put_dword(res);
150 }
151
152 void replay_char_read_all_save_buf(uint8_t *buf, int offset)
153 {
154 g_assert(replay_mutex_locked());
155 replay_save_instructions();
156 replay_put_event(EVENT_CHAR_READ_ALL);
157 replay_put_array(buf, offset);
158 }