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thread: Use not malloc'ed but fixed size string for thread name

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256 bytes will be enough but not too large for the name of SPDK
thread. Use fixed size string for the name of SPDK thread and
reduce the potential malloc failure. If the length of passed name
is longer then 256, it will be cut off without error.

Change-Id: I13a24997a73a8365c8bf5e093f2bd78861ba6660
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/459720
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-06-28 14:26:00 +09:00 committed by Changpeng Liu
parent 404d27263f
commit 09013306c3
1 changed files with 4 additions and 4 deletions
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8
lib/thread/thread.c
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@ -43,6 +43,7 @@
#include "spdk_internal/thread.h"
#define SPDK_MSG_BATCH_SIZE 8
#define SPDK_MAX_THREAD_NAME_LEN 256
static pthread_mutex_t g_devlist_mutex = PTHREAD_MUTEX_INITIALIZER;
@ -103,7 +104,7 @@ struct spdk_poller {
struct spdk_thread {
TAILQ_HEAD(, spdk_io_channel) io_channels;
TAILQ_ENTRY(spdk_thread) tailq;
char *name;
char name[SPDK_MAX_THREAD_NAME_LEN + 1];
bool exit;
@ -227,7 +228,6 @@ _free_thread(struct spdk_thread *thread)
pthread_mutex_unlock(&g_devlist_mutex);
spdk_cpuset_free(thread->cpumask);
free(thread->name);
msg = SLIST_FIRST(&thread->msg_cache);
while (msg != NULL) {
@ -300,9 +300,9 @@ spdk_thread_create(const char *name, struct spdk_cpuset *cpumask)
}
if (name) {
thread->name = strdup(name);
snprintf(thread->name, sizeof(thread->name), "%s", name);
} else {
thread->name = spdk_sprintf_alloc("%p", thread);
snprintf(thread->name, sizeof(thread->name), "%p", thread);
}
SPDK_DEBUGLOG(SPDK_LOG_THREAD, "Allocating new thread %s\n", thread->name);