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authorDon Dugger <n0ano@n0ano.com>2016-06-03 03:33:22 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2016-06-03 03:33:23 +0000
commitda27230f80795d0028333713f036d44c53cb0e68 (patch)
treeb3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/replay/replay-char.c
parent0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff)
parent437fd90c0250dee670290f9b714253671a990160 (diff)
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/replay/replay-char.c')
-rwxr-xr-xqemu/replay/replay-char.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/qemu/replay/replay-char.c b/qemu/replay/replay-char.c
new file mode 100755
index 000000000..23b692297
--- /dev/null
+++ b/qemu/replay/replay-char.c
@@ -0,0 +1,168 @@
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "sysemu/replay.h"
+#include "replay-internal.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/char.h"
+
+/* Char drivers that generate qemu_chr_be_write events
+ that should be saved into the log. */
+static CharDriverState **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(CharDriverState *chr)
+{
+ int i = 0;
+ for ( ; i < drivers_count ; ++i) {
+ if (char_drivers[i] == chr) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+void replay_register_char_driver(CharDriverState *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(CharDriverState *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();
+}