/* XXX We could do fancier error handling... */
-/*!
- * Define ISC_MUTEX_PROFILE to turn on profiling of mutexes by line. When
- * enabled, isc_mutex_stats() can be used to print a table showing the
- * number of times each type of mutex was locked and the amount of time
- * waiting to obtain the lock.
- */
-#ifndef ISC_MUTEX_PROFILE
-#define ISC_MUTEX_PROFILE 0
-#endif /* ifndef ISC_MUTEX_PROFILE */
-
-#if ISC_MUTEX_PROFILE
-typedef struct isc_mutexstats isc_mutexstats_t;
-
-typedef struct {
- pthread_mutex_t mutex; /*%< The actual mutex. */
- isc_mutexstats_t *stats; /*%< Mutex statistics. */
-} isc_mutex_t;
-#else /* if ISC_MUTEX_PROFILE */
typedef pthread_mutex_t isc_mutex_t;
-#endif /* if ISC_MUTEX_PROFILE */
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_init(mp) isc_mutex_init_profile((mp), __FILE__, __LINE__)
-#else /* if ISC_MUTEX_PROFILE */
#if ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)
#define isc_mutex_init(mp) isc_mutex_init_errcheck((mp))
#else /* if ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK) */
void
isc__mutex_init(isc_mutex_t *mp, const char *file, unsigned int line);
#endif /* if ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK) */
-#endif /* if ISC_MUTEX_PROFILE */
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_lock(mp) isc_mutex_lock_profile((mp), __FILE__, __LINE__)
-#else /* if ISC_MUTEX_PROFILE */
#define isc_mutex_lock(mp) \
((pthread_mutex_lock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
-#endif /* if ISC_MUTEX_PROFILE */
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_unlock(mp) isc_mutex_unlock_profile((mp), __FILE__, __LINE__)
-#else /* if ISC_MUTEX_PROFILE */
#define isc_mutex_unlock(mp) \
((pthread_mutex_unlock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
-#endif /* if ISC_MUTEX_PROFILE */
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_trylock(mp) \
- ((pthread_mutex_trylock((&(mp)->mutex)) == 0) ? ISC_R_SUCCESS \
- : ISC_R_LOCKBUSY)
-#else /* if ISC_MUTEX_PROFILE */
#define isc_mutex_trylock(mp) \
((pthread_mutex_trylock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY)
-#endif /* if ISC_MUTEX_PROFILE */
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_destroy(mp) \
- RUNTIME_CHECK(pthread_mutex_destroy((&(mp)->mutex)) == 0)
-#else /* if ISC_MUTEX_PROFILE */
#define isc_mutex_destroy(mp) RUNTIME_CHECK(pthread_mutex_destroy((mp)) == 0)
-#endif /* if ISC_MUTEX_PROFILE */
-
-#if ISC_MUTEX_PROFILE
-#define isc_mutex_stats(fp) isc_mutex_statsprofile(fp);
-#else /* if ISC_MUTEX_PROFILE */
-#define isc_mutex_stats(fp)
-#endif /* if ISC_MUTEX_PROFILE */
-
-#if ISC_MUTEX_PROFILE
-
-void
-isc_mutex_init_profile(isc_mutex_t *mp, const char *_file, int _line);
-isc_result_t
-isc_mutex_lock_profile(isc_mutex_t *mp, const char *_file, int _line);
-isc_result_t
-isc_mutex_unlock_profile(isc_mutex_t *mp, const char *_file, int _line);
-
-void
-isc_mutex_statsprofile(FILE *fp);
-#endif /* ISC_MUTEX_PROFILE */
void
isc_mutex_init_errcheck(isc_mutex_t *mp);
#include <isc/string.h>
#include <isc/util.h>
-#if ISC_MUTEX_PROFILE
-
-/*@{*/
-/*% Operations on timevals; adapted from FreeBSD's sys/time.h */
-#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
-#define timevaladd(vvp, uvp) \
- do { \
- (vvp)->tv_sec += (uvp)->tv_sec; \
- (vvp)->tv_usec += (uvp)->tv_usec; \
- if ((vvp)->tv_usec >= 1000000) { \
- (vvp)->tv_sec++; \
- (vvp)->tv_usec -= 1000000; \
- } \
- } while (0)
-#define timevalsub(vvp, uvp) \
- do { \
- (vvp)->tv_sec -= (uvp)->tv_sec; \
- (vvp)->tv_usec -= (uvp)->tv_usec; \
- if ((vvp)->tv_usec < 0) { \
- (vvp)->tv_sec--; \
- (vvp)->tv_usec += 1000000; \
- } \
- } while (0)
-
-/*@}*/
-
-#define ISC_MUTEX_MAX_LOCKERS 32
-
-typedef struct {
- const char *file;
- int line;
- unsigned count;
- struct timeval locked_total;
- struct timeval wait_total;
-} isc_mutexlocker_t;
-
-struct isc_mutexstats {
- const char *file; /*%< File mutex was created in. */
- int line; /*%< Line mutex was created on. */
- unsigned count;
- struct timeval lock_t;
- struct timeval locked_total;
- struct timeval wait_total;
- isc_mutexlocker_t *cur_locker;
- isc_mutexlocker_t lockers[ISC_MUTEX_MAX_LOCKERS];
-};
-
-#ifndef ISC_MUTEX_PROFTABLESIZE
-#define ISC_MUTEX_PROFTABLESIZE (1024 * 1024)
-#endif /* ifndef ISC_MUTEX_PROFTABLESIZE */
-static isc_mutexstats_t stats[ISC_MUTEX_PROFTABLESIZE];
-static int stats_next = 0;
-static bool stats_init = false;
-static pthread_mutex_t statslock = PTHREAD_MUTEX_INITIALIZER;
-
-void
-isc_mutex_init_profile(isc_mutex_t *mp, const char *file, int line) {
- int i, err;
-
- err = pthread_mutex_init(&mp->mutex, NULL);
- if (err != 0) {
- strerror_r(err, strbuf, sizeof(strbuf));
- isc_error_fatal(file, line, "pthread_mutex_init failed: %s",
- strbuf);
- }
-
- RUNTIME_CHECK(pthread_mutex_lock(&statslock) == 0);
-
- if (!stats_init) {
- stats_init = true;
- }
-
- /*
- * If all statistics entries have been used, give up and trigger an
- * assertion failure. There would be no other way to deal with this
- * because we'd like to keep record of all locks for the purpose of
- * debugging and the number of necessary locks is unpredictable.
- * If this failure is triggered while debugging, named should be
- * rebuilt with an increased ISC_MUTEX_PROFTABLESIZE.
- */
- RUNTIME_CHECK(stats_next < ISC_MUTEX_PROFTABLESIZE);
- mp->stats = &stats[stats_next++];
-
- RUNTIME_CHECK(pthread_mutex_unlock(&statslock) == 0);
-
- mp->stats->file = file;
- mp->stats->line = line;
- mp->stats->count = 0;
- timevalclear(&mp->stats->locked_total);
- timevalclear(&mp->stats->wait_total);
- for (i = 0; i < ISC_MUTEX_MAX_LOCKERS; i++) {
- mp->stats->lockers[i].file = NULL;
- mp->stats->lockers[i].line = 0;
- mp->stats->lockers[i].count = 0;
- timevalclear(&mp->stats->lockers[i].locked_total);
- timevalclear(&mp->stats->lockers[i].wait_total);
- }
-}
-
-isc_result_t
-isc_mutex_lock_profile(isc_mutex_t *mp, const char *file, int line) {
- struct timeval prelock_t;
- struct timeval postlock_t;
- isc_mutexlocker_t *locker = NULL;
- int i;
-
- gettimeofday(&prelock_t, NULL);
-
- if (pthread_mutex_lock(&mp->mutex) != 0) {
- return (ISC_R_UNEXPECTED);
- }
-
- gettimeofday(&postlock_t, NULL);
- mp->stats->lock_t = postlock_t;
-
- timevalsub(&postlock_t, &prelock_t);
-
- mp->stats->count++;
- timevaladd(&mp->stats->wait_total, &postlock_t);
-
- for (i = 0; i < ISC_MUTEX_MAX_LOCKERS; i++) {
- if (mp->stats->lockers[i].file == NULL) {
- locker = &mp->stats->lockers[i];
- locker->file = file;
- locker->line = line;
- break;
- } else if (mp->stats->lockers[i].file == file &&
- mp->stats->lockers[i].line == line)
- {
- locker = &mp->stats->lockers[i];
- break;
- }
- }
-
- if (locker != NULL) {
- locker->count++;
- timevaladd(&locker->wait_total, &postlock_t);
- }
-
- mp->stats->cur_locker = locker;
-
- return (ISC_R_SUCCESS);
-}
-
-isc_result_t
-isc_mutex_unlock_profile(isc_mutex_t *mp, const char *file, int line) {
- struct timeval unlock_t;
-
- UNUSED(file);
- UNUSED(line);
-
- if (mp->stats->cur_locker != NULL) {
- gettimeofday(&unlock_t, NULL);
- timevalsub(&unlock_t, &mp->stats->lock_t);
- timevaladd(&mp->stats->locked_total, &unlock_t);
- timevaladd(&mp->stats->cur_locker->locked_total, &unlock_t);
- mp->stats->cur_locker = NULL;
- }
-
- return ((pthread_mutex_unlock((&mp->mutex)) == 0) ? ISC_R_SUCCESS
- : ISC_R_UNEXPECTED);
-}
-
-void
-isc_mutex_statsprofile(FILE *fp) {
- isc_mutexlocker_t *locker;
- int i, j;
-
- fprintf(fp, "Mutex stats (in us)\n");
- for (i = 0; i < stats_next; i++) {
- fprintf(fp, "%-12s %4d: %10u %lu.%06lu %lu.%06lu %5d\n",
- stats[i].file, stats[i].line, stats[i].count,
- stats[i].locked_total.tv_sec,
- stats[i].locked_total.tv_usec,
- stats[i].wait_total.tv_sec, stats[i].wait_total.tv_usec,
- i);
- for (j = 0; j < ISC_MUTEX_MAX_LOCKERS; j++) {
- locker = &stats[i].lockers[j];
- if (locker->file == NULL) {
- continue;
- }
- fprintf(fp,
- " %-11s %4d: %10u %lu.%06lu %lu.%06lu %5d\n",
- locker->file, locker->line, locker->count,
- locker->locked_total.tv_sec,
- locker->locked_total.tv_usec,
- locker->wait_total.tv_sec,
- locker->wait_total.tv_usec, i);
- }
- }
-}
-
-#endif /* ISC_MUTEX_PROFILE */
-
#if ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)
static bool errcheck_initialized = false;
#endif /* if ISC_MUTEX_DEBUG && defined(__NetBSD__) && \
* defined(PTHREAD_MUTEX_ERRORCHECK) */
-#if !(ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)) && \
- !ISC_MUTEX_PROFILE
+#if !(ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK))
#ifdef HAVE_PTHREAD_MUTEX_ADAPTIVE_NP
static bool attr_initialized = false;
strbuf);
}
}
-#endif /* if !(ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)) && \
- * !ISC_MUTEX_PROFILE */
+#endif /* if !(ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)) */
projects / thirdparty / bind9.git / commitdiff
