Merge lp:~akopytov/percona-xtrabackup/bug1166888-2.0 into lp:percona-xtrabackup/2.0

[Alexey Kopytov]

    Bug #1166888: XtraBackup segfaults after period of time

    The problem was that that the log copying thread did not call
    my_thread_init() which resulted in a crash as soon as any mysys function
    tried to access my_thread_var.

    Fixed by calling my_thread_init() and my_thread_end() when necessary.

http://jenkins.percona.com/view/XtraBackup/job/percona-xtrabackup-2.0-param/388/

[Laurynas Biveinis (laurynas-biveinis)]

review: Approve

=== modified file 'src/xtrabackup.cc'
--- src/xtrabackup.cc	2013-04-03 22:53:49 +0000
+++ src/xtrabackup.cc	2013-04-11 16:16:23 +0000
@@ -4502,6 +4502,12 @@
 
 	ut_a(dst_log_fd != XB_FILE_UNDEFINED);
 
+	/*
+	  Initialize mysys thread-specific memory so we can
+	  use mysys functions in this thread.
+	*/
+	my_thread_init();
+
 	log_copying_running = TRUE;
 
 	while(log_copying) {
@@ -4522,6 +4528,7 @@
 	log_copying_succeed = TRUE;
 end:
 	log_copying_running = FALSE;
+	my_thread_end();
 	os_thread_exit(NULL);
 
 	return(0);