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put shared variables into thread-local storage

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This doesn't solve the general design problem of the log.c (eg; some log lines
got lost or scattered into multiple files) but at least prevent multithreaded
code from crashing.

Before this change something like following;

sudo src/tests/lxc-test-concurrent -i 10 -j 20

was crashing nearly all the time due to 3afbcc4600 as we started to
set lxc.loglevel and lxc.logfile with that commit.

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
This commit is contained in:
S.Çağlar Onur 2014-03-06 23:27:05 -05:00 committed by Serge Hallyn
parent e5ab821d6f
commit dc5406bbbd
1 changed files with 10 additions and 0 deletions
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10
src/lxc/log.c
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@ -41,6 +41,15 @@
#define LXC_LOG_BUFFER_SIZE 512
int lxc_log_fd = -1;
#ifdef HAVE_TLS
static __thread char log_prefix[LXC_LOG_PREFIX_SIZE] = "lxc";
static __thread char *log_fname = NULL;
/* command line values for logfile or logpriority should always override
* values from the configuration file or defaults
*/
static __thread int lxc_logfile_specified = 0;
static __thread int lxc_loglevel_specified = 0;
#else
static char log_prefix[LXC_LOG_PREFIX_SIZE] = "lxc";
static char *log_fname = NULL;
/* command line values for logfile or logpriority should always override
@ -48,6 +57,7 @@ static char *log_fname = NULL;
*/
static int lxc_logfile_specified = 0;
static int lxc_loglevel_specified = 0;
#endif
lxc_log_define(lxc_log, lxc);