void
__mtx_lock_spin_flags(volatile uintptr_t *c, int opts, const char *file,
int line)
{
struct mtx *m;
if (SCHEDULER_STOPPED())
return;
m = mtxlock2mtx(c);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_lock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0 ||
(opts & MTX_RECURSE) != 0,
("mtx_lock_spin: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
opts &= ~MTX_RECURSE;
WITNESS_CHECKORDER(&m->lock_object, opts | LOP_NEWORDER | LOP_EXCLUSIVE,
file, line, NULL);
__mtx_lock_spin(m, curthread, opts, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
}
int
__mtx_trylock_spin_flags(volatile uintptr_t *c, int opts, const char *file,
int line)
{
struct mtx *m;
if (SCHEDULER_STOPPED())
return (1);
m = mtxlock2mtx(c);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_trylock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_trylock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
KASSERT((opts & MTX_RECURSE) == 0,
("mtx_trylock_spin: unsupp. opt MTX_RECURSE on mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
if (__mtx_trylock_spin(m, curthread, opts, file, line)) {
LOCK_LOG_TRY("LOCK", &m->lock_object, opts, 1, file, line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
return (1);
}
LOCK_LOG_TRY("LOCK", &m->lock_object, opts, 0, file, line);
return (0);
}
/*
* Function versions of the inlined __mtx_* macros. These are used by
* modules and can also be called from assembly language if needed.
*/
void
__mtx_lock_flags(volatile uintptr_t *c, int opts, const char *file, int line)
{
struct mtx *m;
if (SCHEDULER_STOPPED())
return;
m = mtxlock2mtx(c);
KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
("mtx_lock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_lock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
WITNESS_CHECKORDER(&m->lock_object, (opts & ~MTX_RECURSE) |
LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
__mtx_lock(m, curthread, opts, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, (opts & ~MTX_RECURSE) | LOP_EXCLUSIVE,
file, line);
TD_LOCKS_INC(curthread);
}
/*
* The important part of mtx_trylock{,_flags}()
* Tries to acquire lock `m.' If this function is called on a mutex that
* is already owned, it will recursively acquire the lock.
*/
int
_mtx_trylock_flags_int(struct mtx *m, int opts LOCK_FILE_LINE_ARG_DEF)
{
struct thread *td;
uintptr_t tid, v;
#ifdef LOCK_PROFILING
uint64_t waittime = 0;
int contested = 0;
#endif
int rval;
bool recursed;
td = curthread;
tid = (uintptr_t)td;
if (SCHEDULER_STOPPED_TD(td))
return (1);
KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(td),
("mtx_trylock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_trylock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_trylock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
rval = 1;
recursed = false;
v = MTX_UNOWNED;
for (;;) {
if (_mtx_obtain_lock_fetch(m, &v, tid))
break;
if (v == MTX_UNOWNED)
continue;
if (v == tid &&
((m->lock_object.lo_flags & LO_RECURSABLE) != 0 ||
(opts & MTX_RECURSE) != 0)) {
m->mtx_recurse++;
atomic_set_ptr(&m->mtx_lock, MTX_RECURSED);
recursed = true;
break;
}
rval = 0;
break;
}
opts &= ~MTX_RECURSE;
LOCK_LOG_TRY("LOCK", &m->lock_object, opts, rval, file, line);
if (rval) {
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE | LOP_TRYLOCK,
file, line);
TD_LOCKS_INC(curthread);
if (!recursed)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(adaptive__acquire,
m, contested, waittime, file, line);
}
return (rval);
}
/*
* Check to see if a thread that is blocked on a sleep queue is actually
* blocked on an sx lock. If so, output some details and return true.
* If the lock has an exclusive owner, return that in *ownerp.
*/
int
sx_chain(struct thread *td, struct thread **ownerp)
{
struct sx *sx;
/*
* Check to see if this thread is blocked on an sx lock.
* First, we check the lock class. If that is ok, then we
* compare the lock name against the wait message.
*/
sx = td->td_wchan;
if (LOCK_CLASS(&sx->lock_object) != &lock_class_sx ||
sx->lock_object.lo_name != td->td_wmesg)
return (0);
/* We think we have an sx lock, so output some details. */
db_printf("blocked on sx \"%s\" ", td->td_wmesg);
*ownerp = sx_xholder(sx);
if (sx->sx_lock & SX_LOCK_SHARED)
db_printf("SLOCK (count %ju)\n",
(uintmax_t)SX_SHARERS(sx->sx_lock));
else
db_printf("XLOCK\n");
return (1);
}
static void
db_show_rm(const struct lock_object *lock)
{
struct rm_priotracker *tr;
struct rm_queue *queue;
const struct rmlock *rm;
struct lock_class *lc;
struct pcpu *pc;
rm = (const struct rmlock *)lock;
db_printf(" writecpus: ");
ddb_display_cpuset(__DEQUALIFY(const cpuset_t *, &rm->rm_writecpus));
db_printf("\n");
db_printf(" per-CPU readers:\n");
STAILQ_FOREACH(pc, &cpuhead, pc_allcpu)
for (queue = pc->pc_rm_queue.rmq_next;
queue != &pc->pc_rm_queue; queue = queue->rmq_next) {
tr = (struct rm_priotracker *)queue;
if (tr->rmp_rmlock == rm)
print_tracker(tr);
}
db_printf(" active readers:\n");
LIST_FOREACH(tr, &rm->rm_activeReaders, rmp_qentry)
print_tracker(tr);
lc = LOCK_CLASS(&rm->rm_wlock_object);
db_printf("Backing write-lock (%s):\n", lc->lc_name);
lc->lc_ddb_show(&rm->rm_wlock_object);
}
/*
* Function versions of the inlined __mtx_* macros. These are used by
* modules and can also be called from assembly language if needed.
*/
void
__mtx_lock_flags(volatile uintptr_t *c, int opts, const char *file, int line)
{
struct mtx *m;
uintptr_t tid, v;
m = mtxlock2mtx(c);
KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
!TD_IS_IDLETHREAD(curthread),
("mtx_lock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_lock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
WITNESS_CHECKORDER(&m->lock_object, (opts & ~MTX_RECURSE) |
LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
tid = (uintptr_t)curthread;
v = MTX_UNOWNED;
if (!_mtx_obtain_lock_fetch(m, &v, tid))
_mtx_lock_sleep(m, v, opts, file, line);
else
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(adaptive__acquire,
m, 0, 0, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, (opts & ~MTX_RECURSE) | LOP_EXCLUSIVE,
file, line);
TD_LOCKS_INC(curthread);
}
JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyCompressor_compressBytesDirect
(JNIEnv *env, jobject thisj){
// Get members of SnappyCompressor
jobject clazz = (*env)->GetStaticObjectField(env, thisj, SnappyCompressor_clazz);
jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, SnappyCompressor_uncompressedDirectBuf);
jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, SnappyCompressor_uncompressedDirectBufLen);
jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, SnappyCompressor_compressedDirectBuf);
jint compressed_direct_buf_len = (*env)->GetIntField(env, thisj, SnappyCompressor_directBufferSize);
size_t buf_len;
// Get the input direct buffer
LOCK_CLASS(env, clazz, "SnappyCompressor");
const char* uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
UNLOCK_CLASS(env, clazz, "SnappyCompressor");
if (uncompressed_bytes == 0) {
return (jint)0;
}
// Get the output direct buffer
LOCK_CLASS(env, clazz, "SnappyCompressor");
char* compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
UNLOCK_CLASS(env, clazz, "SnappyCompressor");
if (compressed_bytes == 0) {
return (jint)0;
}
/* size_t should always be 4 bytes or larger. */
buf_len = (size_t)compressed_direct_buf_len;
snappy_status ret = dlsym_snappy_compress(uncompressed_bytes,
uncompressed_direct_buf_len, compressed_bytes, &buf_len);
if (ret != SNAPPY_OK){
THROW(env, "Ljava/lang/InternalError", "Could not compress data. Buffer length is too small.");
return 0;
}
if (buf_len > JINT_MAX) {
THROW(env, "Ljava/lang/InternalError", "Invalid return buffer length.");
return 0;
}
(*env)->SetIntField(env, thisj, SnappyCompressor_uncompressedDirectBufLen, 0);
return (jint)buf_len;
}
static int
owner_rm(const struct lock_object *lock, struct thread **owner)
{
const struct rmlock *rm;
struct lock_class *lc;
rm = (const struct rmlock *)lock;
lc = LOCK_CLASS(&rm->rm_wlock_object);
return (lc->lc_owner(&rm->rm_wlock_object, owner));
}
void test(void)
{
LOCK_CLASS(lc);
struct lock a;
MXINIT(&a, &lc);
test_set_panic_string("lockdep: Aborting - releasing unheld lock");
MXUNLOCK(&a);
}
void test(void)
{
LOCK_CLASS(lc);
struct lock a;
MXINIT(&a, &lc);
MXLOCK(&a);
test_set_panic_string("lockdep: Aborting - deadlock");
MXLOCK(&a);
}
JNIEXPORT jint JNICALL Java_com_indeed_util_compress_snappy_SnappyDecompressor_decompressBytesDirect
(JNIEnv *env, jobject thisj){
// Get members of SnappyDecompressor
jobject clazz = (*env)->GetStaticObjectField(env,thisj, SnappyDecompressor_clazz);
jobject compressed_direct_buf = (*env)->GetObjectField(env,thisj, SnappyDecompressor_compressedDirectBuf);
jint compressed_direct_buf_len = (*env)->GetIntField(env,thisj, SnappyDecompressor_compressedDirectBufLen);
jobject uncompressed_direct_buf = (*env)->GetObjectField(env,thisj, SnappyDecompressor_uncompressedDirectBuf);
size_t uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, SnappyDecompressor_directBufferSize);
// Get the input direct buffer
LOCK_CLASS(env, clazz, "SnappyDecompressor");
const char* compressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
UNLOCK_CLASS(env, clazz, "SnappyDecompressor");
if (compressed_bytes == 0) {
return (jint)0;
}
// Get the output direct buffer
LOCK_CLASS(env, clazz, "SnappyDecompressor");
char* uncompressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
UNLOCK_CLASS(env, clazz, "SnappyDecompressor");
if (uncompressed_bytes == 0) {
return (jint)0;
}
snappy_status ret = dlsym_snappy_uncompress(compressed_bytes, compressed_direct_buf_len, uncompressed_bytes, &uncompressed_direct_buf_len);
if (ret == SNAPPY_BUFFER_TOO_SMALL){
THROW(env, "java/lang/InternalError", "Could not decompress data. Buffer length is too small.");
} else if (ret == SNAPPY_INVALID_INPUT){
THROW(env, "java/lang/InternalError", "Could not decompress data. Input is invalid.");
} else if (ret != SNAPPY_OK){
THROW(env, "java/lang/InternalError", "Could not decompress data.");
}
(*env)->SetIntField(env, thisj, SnappyDecompressor_compressedDirectBufLen, 0);
return (jint)uncompressed_direct_buf_len;
}
JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Decompressor_decompressBytesDirect
(JNIEnv *env, jobject thisj){
const char *compressed_bytes;
char *uncompressed_bytes;
// Get members of Lz4Decompressor
jobject clazz = (*env)->GetStaticObjectField(env,thisj, Lz4Decompressor_clazz);
jobject compressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_compressedDirectBuf);
jint compressed_direct_buf_len = (*env)->GetIntField(env,thisj, Lz4Decompressor_compressedDirectBufLen);
jobject uncompressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_uncompressedDirectBuf);
size_t uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Decompressor_directBufferSize);
// Get the input direct buffer
LOCK_CLASS(env, clazz, "Lz4Decompressor");
compressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
UNLOCK_CLASS(env, clazz, "Lz4Decompressor");
if (compressed_bytes == 0) {
return (jint)0;
}
// Get the output direct buffer
LOCK_CLASS(env, clazz, "Lz4Decompressor");
uncompressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
UNLOCK_CLASS(env, clazz, "Lz4Decompressor");
if (uncompressed_bytes == 0) {
return (jint)0;
}
uncompressed_direct_buf_len = LZ4_uncompress_unknownOutputSize(compressed_bytes, uncompressed_bytes, compressed_direct_buf_len, uncompressed_direct_buf_len);
if (uncompressed_direct_buf_len < 0) {
THROW(env, "java/lang/InternalError", "LZ4_uncompress_unknownOutputSize failed.");
}
(*env)->SetIntField(env, thisj, Lz4Decompressor_compressedDirectBufLen, 0);
return (jint)uncompressed_direct_buf_len;
}
static void
thread_lock_validate(struct mtx *m, int opts, const char *file, int line)
{
KASSERT(m->mtx_lock != MTX_DESTROYED,
("thread_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("thread_lock() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0,
("thread_lock: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
WITNESS_CHECKORDER(&m->lock_object,
opts | LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
}
/*
* The important part of mtx_trylock{,_flags}()
* Tries to acquire lock `m.' If this function is called on a mutex that
* is already owned, it will recursively acquire the lock.
*/
int
_mtx_trylock_flags_(volatile uintptr_t *c, int opts, const char *file, int line)
{
struct mtx *m;
#ifdef LOCK_PROFILING
uint64_t waittime = 0;
int contested = 0;
#endif
int rval;
if (SCHEDULER_STOPPED())
return (1);
m = mtxlock2mtx(c);
KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
("mtx_trylock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_trylock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_trylock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
if (mtx_owned(m) && ((m->lock_object.lo_flags & LO_RECURSABLE) != 0 ||
(opts & MTX_RECURSE) != 0)) {
m->mtx_recurse++;
atomic_set_ptr(&m->mtx_lock, MTX_RECURSED);
rval = 1;
} else
rval = _mtx_obtain_lock(m, (uintptr_t)curthread);
opts &= ~MTX_RECURSE;
LOCK_LOG_TRY("LOCK", &m->lock_object, opts, rval, file, line);
if (rval) {
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE | LOP_TRYLOCK,
file, line);
TD_LOCKS_INC(curthread);
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(adaptive__acquire,
m, contested, waittime, file, line);
}
return (rval);
}
void
_mtx_unlock_spin_flags(struct mtx *m, int opts, const char *file, int line)
{
MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_unlock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
WITNESS_UNLOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCK_LOG_LOCK("UNLOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
mtx_assert(m, MA_OWNED);
_rel_spin_lock(m);
}
/*
* Function versions of the inlined __mtx_* macros. These are used by
* modules and can also be called from assembly language if needed.
*/
void
_mtx_lock_flags(struct mtx *m, int opts, const char *file, int line)
{
MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_lock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
WITNESS_CHECKORDER(&m->lock_object, opts | LOP_NEWORDER | LOP_EXCLUSIVE,
file, line, NULL);
_get_sleep_lock(m, curthread, opts, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
curthread->td_locks++;
}
void
_mtx_unlock_flags(struct mtx *m, int opts, const char *file, int line)
{
MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_unlock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
curthread->td_locks--;
WITNESS_UNLOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCK_LOG_LOCK("UNLOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
mtx_assert(m, MA_OWNED);
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_RELEASE_LOCK(LS_MTX_UNLOCK_RELEASE, m);
_rel_sleep_lock(m, curthread, opts, file, line);
}
void
__mtx_unlock_spin_flags(volatile uintptr_t *c, int opts, const char *file,
int line)
{
struct mtx *m;
m = mtxlock2mtx(c);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_unlock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
WITNESS_UNLOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCK_LOG_LOCK("UNLOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
mtx_assert(m, MA_OWNED);
__mtx_unlock_spin(m);
}
void
_mtx_lock_spin_flags(struct mtx *m, int opts, const char *file, int line)
{
MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_lock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0,
("mtx_lock_spin: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
WITNESS_CHECKORDER(&m->lock_object, opts | LOP_NEWORDER | LOP_EXCLUSIVE,
file, line, NULL);
_get_spin_lock(m, curthread, opts, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
}
void
__mtx_lock_spin_flags(volatile uintptr_t *c, int opts, const char *file,
int line)
{
struct mtx *m;
#ifdef SMP
uintptr_t tid, v;
#endif
m = mtxlock2mtx(c);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("mtx_lock_spin() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0 ||
(opts & MTX_RECURSE) != 0,
("mtx_lock_spin: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
opts &= ~MTX_RECURSE;
WITNESS_CHECKORDER(&m->lock_object, opts | LOP_NEWORDER | LOP_EXCLUSIVE,
file, line, NULL);
#ifdef SMP
spinlock_enter();
tid = (uintptr_t)curthread;
v = MTX_UNOWNED;
if (!_mtx_obtain_lock_fetch(m, &v, tid))
_mtx_lock_spin(m, v, opts, file, line);
else
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(spin__acquire,
m, 0, 0, file, line);
#else
__mtx_lock_spin(m, curthread, opts, file, line);
#endif
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
}
void
__mtx_unlock_flags(volatile uintptr_t *c, int opts, const char *file, int line)
{
struct mtx *m;
if (SCHEDULER_STOPPED())
return;
m = mtxlock2mtx(c);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_unlock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
WITNESS_UNLOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCK_LOG_LOCK("UNLOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
mtx_assert(m, MA_OWNED);
__mtx_unlock(m, curthread, opts, file, line);
TD_LOCKS_DEC(curthread);
}
/*
* The important part of mtx_trylock{,_flags}()
* Tries to acquire lock `m.' If this function is called on a mutex that
* is already owned, it will recursively acquire the lock.
*/
int
_mtx_trylock(struct mtx *m, int opts, const char *file, int line)
{
#ifdef LOCK_PROFILING
uint64_t waittime = 0;
int contested = 0;
#endif
int rval;
MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_trylock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
("mtx_trylock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
file, line));
if (mtx_owned(m) && (m->lock_object.lo_flags & LO_RECURSABLE) != 0) {
m->mtx_recurse++;
atomic_set_ptr(&m->mtx_lock, MTX_RECURSED);
rval = 1;
} else
rval = _obtain_lock(m, (uintptr_t)curthread);
LOCK_LOG_TRY("LOCK", &m->lock_object, opts, rval, file, line);
if (rval) {
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE | LOP_TRYLOCK,
file, line);
curthread->td_locks++;
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(LS_MTX_LOCK_ACQUIRE,
m, contested, waittime, file, line);
}
return (rval);
}
void
_thread_lock_flags(struct thread *td, int opts, const char *file, int line)
{
struct mtx *m;
uintptr_t tid;
int i;
#ifdef LOCK_PROFILING
int contested = 0;
uint64_t waittime = 0;
#endif
#ifdef KDTRACE_HOOKS
uint64_t spin_cnt = 0;
#endif
i = 0;
tid = (uintptr_t)curthread;
for (;;) {
retry:
spinlock_enter();
m = td->td_lock;
KASSERT(m->mtx_lock != MTX_DESTROYED,
("thread_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("thread_lock() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0,
("thread_lock: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
WITNESS_CHECKORDER(&m->lock_object,
opts | LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
while (!_obtain_lock(m, tid)) {
#ifdef KDTRACE_HOOKS
spin_cnt++;
#endif
if (m->mtx_lock == tid) {
m->mtx_recurse++;
break;
}
lock_profile_obtain_lock_failed(&m->lock_object,
&contested, &waittime);
/* Give interrupts a chance while we spin. */
spinlock_exit();
while (m->mtx_lock != MTX_UNOWNED) {
if (i++ < 10000000)
cpu_spinwait();
else if (i < 60000000 ||
kdb_active || panicstr != NULL)
DELAY(1);
else
_mtx_lock_spin_failed(m);
cpu_spinwait();
if (m != td->td_lock)
goto retry;
}
spinlock_enter();
}
if (m == td->td_lock)
break;
_rel_spin_lock(m); /* does spinlock_exit() */
#ifdef KDTRACE_HOOKS
spin_cnt++;
#endif
}
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(LS_MTX_SPIN_LOCK_ACQUIRE,
m, contested, waittime, (file), (line));
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCKSTAT_RECORD1(LS_THREAD_LOCK_SPIN, m, spin_cnt);
}
void
thread_lock_flags_(struct thread *td, int opts, const char *file, int line)
{
struct mtx *m;
uintptr_t tid;
int i;
#ifdef LOCK_PROFILING
int contested = 0;
uint64_t waittime = 0;
#endif
#ifdef KDTRACE_HOOKS
int64_t spin_time = 0;
#endif
i = 0;
tid = (uintptr_t)curthread;
if (SCHEDULER_STOPPED())
return;
#ifdef KDTRACE_HOOKS
spin_time -= lockstat_nsecs(&td->td_lock->lock_object);
#endif
for (;;) {
retry:
spinlock_enter();
m = td->td_lock;
KASSERT(m->mtx_lock != MTX_DESTROYED,
("thread_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("thread_lock() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0,
("thread_lock: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
WITNESS_CHECKORDER(&m->lock_object,
opts | LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
while (!_mtx_obtain_lock(m, tid)) {
if (m->mtx_lock == tid) {
m->mtx_recurse++;
break;
}
#ifdef HWPMC_HOOKS
PMC_SOFT_CALL( , , lock, failed);
#endif
lock_profile_obtain_lock_failed(&m->lock_object,
&contested, &waittime);
/* Give interrupts a chance while we spin. */
spinlock_exit();
while (m->mtx_lock != MTX_UNOWNED) {
if (i++ < 10000000)
cpu_spinwait();
else if (i < 60000000 ||
kdb_active || panicstr != NULL)
DELAY(1);
else
_mtx_lock_spin_failed(m);
cpu_spinwait();
if (m != td->td_lock)
goto retry;
}
spinlock_enter();
}
if (m == td->td_lock)
break;
__mtx_unlock_spin(m); /* does spinlock_exit() */
}
#ifdef KDTRACE_HOOKS
spin_time += lockstat_nsecs(&m->lock_object);
#endif
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(spin__acquire, m,
contested, waittime, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
LOCKSTAT_RECORD1(thread__spin, m, spin_time);
}
void
thread_lock_flags_(struct thread *td, int opts, const char *file, int line)
{
struct mtx *m;
uintptr_t tid;
struct lock_delay_arg lda;
#ifdef LOCK_PROFILING
int contested = 0;
uint64_t waittime = 0;
#endif
#ifdef KDTRACE_HOOKS
int64_t spin_time = 0;
#endif
tid = (uintptr_t)curthread;
if (SCHEDULER_STOPPED()) {
/*
* Ensure that spinlock sections are balanced even when the
* scheduler is stopped, since we may otherwise inadvertently
* re-enable interrupts while dumping core.
*/
spinlock_enter();
return;
}
lock_delay_arg_init(&lda, &mtx_spin_delay);
#ifdef KDTRACE_HOOKS
spin_time -= lockstat_nsecs(&td->td_lock->lock_object);
#endif
for (;;) {
retry:
spinlock_enter();
m = td->td_lock;
KASSERT(m->mtx_lock != MTX_DESTROYED,
("thread_lock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
("thread_lock() of sleep mutex %s @ %s:%d",
m->lock_object.lo_name, file, line));
if (mtx_owned(m))
KASSERT((m->lock_object.lo_flags & LO_RECURSABLE) != 0,
("thread_lock: recursed on non-recursive mutex %s @ %s:%d\n",
m->lock_object.lo_name, file, line));
WITNESS_CHECKORDER(&m->lock_object,
opts | LOP_NEWORDER | LOP_EXCLUSIVE, file, line, NULL);
for (;;) {
if (m->mtx_lock == MTX_UNOWNED && _mtx_obtain_lock(m, tid))
break;
if (m->mtx_lock == tid) {
m->mtx_recurse++;
break;
}
#ifdef HWPMC_HOOKS
PMC_SOFT_CALL( , , lock, failed);
#endif
lock_profile_obtain_lock_failed(&m->lock_object,
&contested, &waittime);
/* Give interrupts a chance while we spin. */
spinlock_exit();
while (m->mtx_lock != MTX_UNOWNED) {
if (lda.spin_cnt < 10000000) {
lock_delay(&lda);
} else {
lda.spin_cnt++;
if (lda.spin_cnt < 60000000 ||
kdb_active || panicstr != NULL)
DELAY(1);
else
_mtx_lock_spin_failed(m);
cpu_spinwait();
}
if (m != td->td_lock)
goto retry;
}
spinlock_enter();
}
if (m == td->td_lock)
break;
__mtx_unlock_spin(m); /* does spinlock_exit() */
}
#ifdef KDTRACE_HOOKS
spin_time += lockstat_nsecs(&m->lock_object);
#endif
if (m->mtx_recurse == 0)
LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(spin__acquire, m,
contested, waittime, file, line);
LOCK_LOG_LOCK("LOCK", &m->lock_object, opts, m->mtx_recurse, file,
line);
WITNESS_LOCK(&m->lock_object, opts | LOP_EXCLUSIVE, file, line);
#ifdef KDTRACE_HOOKS
if (spin_time != 0)
LOCKSTAT_RECORD1(thread__spin, m, spin_time);
#endif
}
