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-rw-r--r--erts/emulator/beam/erl_bif_info.c463
1 files changed, 308 insertions, 155 deletions
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 96f9b284b3..e5d7efcc72 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -4452,48 +4452,120 @@ BIF_RETTYPE erts_debug_set_internal_state_2(BIF_ALIST_2)
}
#ifdef ERTS_ENABLE_LOCK_COUNT
+
+typedef struct {
+ /* info->location_count may increase between size calculation and term
+ * building, so we cap it at the value sampled in lcnt_build_result_vector.
+ *
+ * Shrinking is safe though. */
+ int max_location_count;
+ erts_lcnt_lock_info_t *info;
+} lcnt_sample_t;
+
+typedef struct lcnt_sample_vector_ {
+ lcnt_sample_t *elements;
+ size_t size;
+} lcnt_sample_vector_t;
+
+static lcnt_sample_vector_t lcnt_build_sample_vector(erts_lcnt_lock_info_list_t *list) {
+ erts_lcnt_lock_info_t *iterator;
+ lcnt_sample_vector_t result;
+ size_t allocated_entries;
+
+ allocated_entries = 64;
+ result.size = 0;
+
+ result.elements = erts_alloc(ERTS_ALC_T_LCNT_VECTOR,
+ allocated_entries * sizeof(lcnt_sample_t));
+
+ iterator = NULL;
+ while(erts_lcnt_iterate_list(list, &iterator)) {
+ erts_lcnt_retain_lock_info(iterator);
+
+ result.elements[result.size].max_location_count = iterator->location_count;
+ result.elements[result.size].info = iterator;
+
+ result.size++;
+
+ if(result.size >= allocated_entries) {
+ allocated_entries *= 2;
+
+ result.elements = erts_realloc(ERTS_ALC_T_LCNT_VECTOR, result.elements,
+ allocated_entries * sizeof(lcnt_sample_t));
+ }
+ }
+
+ return result;
+}
+
+static void lcnt_destroy_sample_vector(lcnt_sample_vector_t *vector) {
+ size_t i;
+
+ for(i = 0; i < vector->size; i++) {
+ erts_lcnt_release_lock_info(vector->elements[i].info);
+ }
+
+ erts_free(ERTS_ALC_T_LCNT_VECTOR, vector->elements);
+}
+
+/* The size of an integer is not guaranteed to be constant since we're walking
+ * over live data, and may cross over into bignum territory between size calc
+ * and the actual build. This takes care of that through always assuming the
+ * worst, but needs to be fixed up with HRelease once the final term has been
+ * built. */
+static ERTS_INLINE Eterm bld_unstable_uint64(Uint **hpp, Uint *szp, Uint64 ui) {
+ Eterm res = THE_NON_VALUE;
+
+ if(szp) {
+ *szp += ERTS_UINT64_HEAP_SIZE(~((Uint64) 0));
+ }
+
+ if(hpp) {
+ if (IS_USMALL(0, ui)) {
+ res = make_small(ui);
+ } else {
+ res = erts_uint64_to_big(ui, hpp);
+ }
+ }
+
+ return res;
+}
+
static Eterm lcnt_build_lock_stats_term(Eterm **hpp, Uint *szp, erts_lcnt_lock_stats_t *stats, Eterm res) {
- Uint tries = 0, colls = 0;
- unsigned long timer_s = 0, timer_ns = 0, timer_n = 0;
- unsigned int line = 0;
unsigned int i;
-
+ const char *file;
+
Eterm af, uil;
Eterm uit, uic;
Eterm uits, uitns, uitn;
Eterm tt, tstat, tloc, t;
Eterm thist, vhist[ERTS_LCNT_HISTOGRAM_SLOT_SIZE];
-
+
/* term:
- * [{{file, line}, {tries, colls, {seconds, nanoseconds, n_blocks}},
- * { .. histogram .. }]
- */
+ * [{{file, line},
+ {tries, colls, {seconds, nanoseconds, n_blocks}},
+ * { .. histogram .. }] */
- tries = (Uint) ethr_atomic_read(&stats->tries);
- colls = (Uint) ethr_atomic_read(&stats->colls);
-
- line = stats->line;
- timer_s = stats->timer.s;
- timer_ns = stats->timer.ns;
- timer_n = stats->timer_n;
-
- af = erts_atom_put((byte *)stats->file, strlen(stats->file), ERTS_ATOM_ENC_LATIN1, 1);
- uil = erts_bld_uint( hpp, szp, line);
+ file = stats->file ? stats->file : "undefined";
+
+ af = erts_atom_put((byte *)file, strlen(file), ERTS_ATOM_ENC_LATIN1, 1);
+ uil = erts_bld_uint( hpp, szp, stats->line);
tloc = erts_bld_tuple(hpp, szp, 2, af, uil);
-
- uit = erts_bld_uint( hpp, szp, tries);
- uic = erts_bld_uint( hpp, szp, colls);
- uits = erts_bld_uint( hpp, szp, timer_s);
- uitns = erts_bld_uint( hpp, szp, timer_ns);
- uitn = erts_bld_uint( hpp, szp, timer_n);
+ uit = bld_unstable_uint64(hpp, szp, (Uint)ethr_atomic_read(&stats->attempts));
+ uic = bld_unstable_uint64(hpp, szp, (Uint)ethr_atomic_read(&stats->collisions));
+
+ uits = bld_unstable_uint64(hpp, szp, stats->total_time_waited.s);
+ uitns = bld_unstable_uint64(hpp, szp, stats->total_time_waited.ns);
+ uitn = bld_unstable_uint64(hpp, szp, stats->times_waited);
tt = erts_bld_tuple(hpp, szp, 3, uits, uitns, uitn);
tstat = erts_bld_tuple(hpp, szp, 3, uit, uic, tt);
for(i = 0; i < ERTS_LCNT_HISTOGRAM_SLOT_SIZE; i++) {
- vhist[i] = erts_bld_uint(hpp, szp, stats->hist.ns[i]);
+ vhist[i] = bld_unstable_uint64(hpp, szp, stats->wait_time_histogram.ns[i]);
}
+
thist = erts_bld_tuplev(hpp, szp, ERTS_LCNT_HISTOGRAM_SLOT_SIZE, vhist);
t = erts_bld_tuple(hpp, szp, 3, tloc, tstat, thist);
@@ -4502,185 +4574,266 @@ static Eterm lcnt_build_lock_stats_term(Eterm **hpp, Uint *szp, erts_lcnt_lock_s
return res;
}
-static Eterm lcnt_build_lock_term(Eterm **hpp, Uint *szp, erts_lcnt_lock_t *lock, Eterm res) {
+static Eterm lcnt_pretty_print_lock_id(erts_lcnt_lock_info_t *info) {
+ Eterm id = info->id;
+
+ if((info->flags & ERTS_LOCK_FLAGS_MASK_TYPE) == ERTS_LOCK_TYPE_PROCLOCK) {
+ /* Use registered names as id's for process locks if available. Thread
+ * progress is delayed since we may be running on a dirty scheduler. */
+ ErtsThrPrgrDelayHandle delay_handle;
+ Process *process;
+
+ delay_handle = erts_thr_progress_unmanaged_delay();
+
+ process = erts_proc_lookup(info->id);
+ if (process && process->common.u.alive.reg) {
+ id = process->common.u.alive.reg->name;
+ }
+
+ erts_thr_progress_unmanaged_continue(delay_handle);
+ } else if(info->flags & ERTS_LOCK_FLAGS_CATEGORY_ALLOCATOR) {
+ if(is_small(id) && !sys_strcmp(info->name, "alcu_allocator")) {
+ const char *name = (const char*)ERTS_ALC_A2AD(signed_val(id));
+ id = erts_atom_put((byte*)name, strlen(name), ERTS_ATOM_ENC_LATIN1, 1);
+ }
+ }
+
+ return id;
+}
+
+static Eterm lcnt_build_lock_term(Eterm **hpp, Uint *szp, lcnt_sample_t *sample, Eterm res) {
+ erts_lcnt_lock_info_t *info = sample->info;
+
Eterm name, type, id, stats = NIL, t;
- Process *proc = NULL;
- char *ltype;
+ const char *lock_desc;
int i;
+
+ /* term: [{name, id, type, stats()}] */
+
+ ASSERT(info->name);
- /* term:
- * [{name, id, type, stats()}]
- */
-
- ASSERT(lock->name);
-
- ltype = erts_lcnt_lock_type(lock->flag);
-
- ASSERT(ltype);
-
- type = erts_atom_put((byte *)ltype, strlen(ltype), ERTS_ATOM_ENC_LATIN1, 1);
- name = erts_atom_put((byte *)lock->name, strlen(lock->name), ERTS_ATOM_ENC_LATIN1, 1);
-
- if (lock->flag & ERTS_LCNT_LT_ALLOC) {
- /* use allocator types names as id's for allocator locks */
- ltype = (char *) ERTS_ALC_A2AD(signed_val(lock->id));
- id = erts_atom_put((byte *)ltype, strlen(ltype), ERTS_ATOM_ENC_LATIN1, 1);
- } else if (lock->flag & ERTS_LCNT_LT_PROCLOCK) {
- /* use registered names as id's for process locks if available */
- proc = erts_proc_lookup(lock->id);
- if (proc && proc->common.u.alive.reg) {
- id = proc->common.u.alive.reg->name;
- } else {
- /* otherwise use process id */
- id = lock->id;
- }
+ lock_desc = erts_lock_flags_get_type_name(info->flags);
+
+ type = erts_atom_put((byte*)lock_desc, strlen(lock_desc), ERTS_ATOM_ENC_LATIN1, 1);
+ name = erts_atom_put((byte*)info->name, strlen(info->name), ERTS_ATOM_ENC_LATIN1, 1);
+
+ /* Only attempt to resolve ids when actually emitting the term. This ought
+ * to be safe since all immediates are the same size. */
+ if(hpp != NULL) {
+ id = lcnt_pretty_print_lock_id(info);
} else {
- id = lock->id;
+ id = NIL;
}
- for (i = 0; i < lock->n_stats; i++) {
- stats = lcnt_build_lock_stats_term(hpp, szp, &(lock->stats[i]), stats);
+ for(i = 0; i < MIN(info->location_count, sample->max_location_count); i++) {
+ stats = lcnt_build_lock_stats_term(hpp, szp, &(info->location_stats[i]), stats);
}
t = erts_bld_tuple(hpp, szp, 4, name, id, type, stats);
- res = erts_bld_cons( hpp, szp, t, res);
+ res = erts_bld_cons(hpp, szp, t, res);
return res;
}
-static Eterm lcnt_build_result_term(Eterm **hpp, Uint *szp, erts_lcnt_data_t *data, Eterm res) {
+static Eterm lcnt_build_result_term(Eterm **hpp, Uint *szp, erts_lcnt_time_t *duration,
+ lcnt_sample_vector_t *current_locks,
+ lcnt_sample_vector_t *deleted_locks, Eterm res) {
+ const char *str_duration = "duration";
+ const char *str_locks = "locks";
+
Eterm dts, dtns, tdt, adur, tdur, aloc, lloc = NIL, tloc;
- erts_lcnt_lock_t *lock = NULL;
- char *str_duration = "duration";
- char *str_locks = "locks";
-
- /* term:
- * [{'duration', {seconds, nanoseconds}}, {'locks', locks()}]
- */
-
+ size_t i;
+
+ /* term: [{'duration', {seconds, nanoseconds}}, {'locks', locks()}] */
+
/* duration tuple */
- dts = erts_bld_uint( hpp, szp, data->duration.s);
- dtns = erts_bld_uint( hpp, szp, data->duration.ns);
+ dts = bld_unstable_uint64(hpp, szp, duration->s);
+ dtns = bld_unstable_uint64(hpp, szp, duration->ns);
tdt = erts_bld_tuple(hpp, szp, 2, dts, dtns);
-
+
adur = erts_atom_put((byte *)str_duration, strlen(str_duration), ERTS_ATOM_ENC_LATIN1, 1);
tdur = erts_bld_tuple(hpp, szp, 2, adur, tdt);
/* lock tuple */
-
aloc = erts_atom_put((byte *)str_locks, strlen(str_locks), ERTS_ATOM_ENC_LATIN1, 1);
-
- for (lock = data->current_locks->head; lock != NULL ; lock = lock->next ) {
- lloc = lcnt_build_lock_term(hpp, szp, lock, lloc);
+
+ for(i = 0; i < current_locks->size; i++) {
+ lloc = lcnt_build_lock_term(hpp, szp, &current_locks->elements[i], lloc);
}
-
- for (lock = data->deleted_locks->head; lock != NULL ; lock = lock->next ) {
- lloc = lcnt_build_lock_term(hpp, szp, lock, lloc);
+
+ for(i = 0; i < deleted_locks->size; i++) {
+ lloc = lcnt_build_lock_term(hpp, szp, &deleted_locks->elements[i], lloc);
}
-
+
tloc = erts_bld_tuple(hpp, szp, 2, aloc, lloc);
-
- res = erts_bld_cons( hpp, szp, tloc, res);
- res = erts_bld_cons( hpp, szp, tdur, res);
+
+ res = erts_bld_cons(hpp, szp, tloc, res);
+ res = erts_bld_cons(hpp, szp, tdur, res);
return res;
-}
+}
+
+static struct {
+ const char *name;
+ erts_lock_flags_t flag;
+} lcnt_category_map[] = {
+ {"allocator", ERTS_LOCK_FLAGS_CATEGORY_ALLOCATOR},
+ {"db", ERTS_LOCK_FLAGS_CATEGORY_DB},
+ {"debug", ERTS_LOCK_FLAGS_CATEGORY_DEBUG},
+ {"distribution", ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION},
+ {"generic", ERTS_LOCK_FLAGS_CATEGORY_GENERIC},
+ {"io", ERTS_LOCK_FLAGS_CATEGORY_IO},
+ {"process", ERTS_LOCK_FLAGS_CATEGORY_PROCESS},
+ {"scheduler", ERTS_LOCK_FLAGS_CATEGORY_SCHEDULER},
+ {NULL, 0}
+ };
+
+static erts_lock_flags_t lcnt_atom_to_lock_category(Eterm atom) {
+ int i = 0;
+
+ for(i = 0; lcnt_category_map[i].name != NULL; i++) {
+ if(erts_is_atom_str(lcnt_category_map[i].name, atom, 0)) {
+ return lcnt_category_map[i].flag;
+ }
+ }
+
+ return 0;
+}
+
+static Eterm lcnt_build_category_list(Eterm **hpp, Uint *szp, erts_lock_flags_t mask) {
+ Eterm res;
+ int i;
+
+ res = NIL;
+
+ for(i = 0; lcnt_category_map[i].name != NULL; i++) {
+ if(mask & lcnt_category_map[i].flag) {
+ Eterm category = erts_atom_put((byte*)lcnt_category_map[i].name,
+ strlen(lcnt_category_map[i].name),
+ ERTS_ATOM_ENC_UTF8, 0);
+
+ res = erts_bld_cons(hpp, szp, category, res);
+ }
+ }
+
+ return res;
+}
+
#endif
-BIF_RETTYPE erts_debug_lock_counters_1(BIF_ALIST_1)
+BIF_RETTYPE erts_debug_lcnt_clear_0(BIF_ALIST_0)
{
-#ifdef ERTS_ENABLE_LOCK_COUNT
- Eterm res = NIL;
-#endif
+#ifndef ERTS_ENABLE_LOCK_COUNT
+ BIF_RET(am_error);
+#else
+ erts_lcnt_clear_counters();
+ BIF_RET(am_ok);
+#endif
+}
- if (BIF_ARG_1 == am_enabled) {
-#ifdef ERTS_ENABLE_LOCK_COUNT
- BIF_RET(am_true);
+BIF_RETTYPE erts_debug_lcnt_collect_0(BIF_ALIST_0)
+{
+#ifndef ERTS_ENABLE_LOCK_COUNT
+ BIF_RET(am_error);
#else
- BIF_RET(am_false);
-#endif
- }
-#ifdef ERTS_ENABLE_LOCK_COUNT
+ lcnt_sample_vector_t current_locks, deleted_locks;
+ erts_lcnt_data_t data;
- else if (BIF_ARG_1 == am_info) {
- erts_lcnt_data_t *data;
- Uint hsize = 0;
- Uint *szp;
- Eterm* hp;
+ Eterm *term_heap_start, *term_heap_end;
+ Uint term_heap_size = 0;
+ Eterm result;
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ data = erts_lcnt_get_data();
- erts_lcnt_set_rt_opt(ERTS_LCNT_OPT_SUSPEND);
- data = erts_lcnt_get_data();
+ current_locks = lcnt_build_sample_vector(data.current_locks);
+ deleted_locks = lcnt_build_sample_vector(data.deleted_locks);
- /* calculate size */
+ lcnt_build_result_term(NULL, &term_heap_size, &data.duration,
+ &current_locks, &deleted_locks, NIL);
- szp = &hsize;
- lcnt_build_result_term(NULL, szp, data, NIL);
+ term_heap_start = HAlloc(BIF_P, term_heap_size);
+ term_heap_end = term_heap_start;
- /* alloc and build */
+ result = lcnt_build_result_term(&term_heap_end, NULL,
+ &data.duration, &current_locks, &deleted_locks, NIL);
- hp = HAlloc(BIF_P, hsize);
+ HRelease(BIF_P, term_heap_start + term_heap_size, term_heap_end);
- res = lcnt_build_result_term(&hp, NULL, data, res);
-
- erts_lcnt_clear_rt_opt(ERTS_LCNT_OPT_SUSPEND);
+ lcnt_destroy_sample_vector(&current_locks);
+ lcnt_destroy_sample_vector(&deleted_locks);
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
-
- BIF_RET(res);
- } else if (BIF_ARG_1 == am_clear) {
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ BIF_RET(result);
+#endif
+}
+
+BIF_RETTYPE erts_debug_lcnt_control_1(BIF_ALIST_1)
+{
+#ifdef ERTS_ENABLE_LOCK_COUNT
+ if(ERTS_IS_ATOM_STR("mask", BIF_ARG_1)) {
+ erts_lock_flags_t mask;
+ Eterm *term_heap_block;
+ Uint term_heap_size;
- erts_lcnt_clear_counters();
+ mask = erts_lcnt_get_category_mask();
+ term_heap_size = 0;
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
+ lcnt_build_category_list(NULL, &term_heap_size, mask);
- BIF_RET(am_ok);
- } else if (is_tuple(BIF_ARG_1)) {
- Eterm* ptr = tuple_val(BIF_ARG_1);
-
- if ((arityval(ptr[0]) == 2) && (ptr[2] == am_false || ptr[2] == am_true)) {
- int lock_opt = 0, enable = (ptr[2] == am_true) ? 1 : 0;
- if (ERTS_IS_ATOM_STR("copy_save", ptr[1])) {
- lock_opt = ERTS_LCNT_OPT_COPYSAVE;
- } else if (ERTS_IS_ATOM_STR("process_locks", ptr[1])) {
- lock_opt = ERTS_LCNT_OPT_PROCLOCK;
- } else if (ERTS_IS_ATOM_STR("port_locks", ptr[1])) {
- lock_opt = ERTS_LCNT_OPT_PORTLOCK;
- } else if (ERTS_IS_ATOM_STR("suspend", ptr[1])) {
- lock_opt = ERTS_LCNT_OPT_SUSPEND;
- } else if (ERTS_IS_ATOM_STR("location", ptr[1])) {
- lock_opt = ERTS_LCNT_OPT_LOCATION;
- } else {
- BIF_ERROR(BIF_P, BADARG);
- }
+ term_heap_block = HAlloc(BIF_P, term_heap_size);
- erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN);
- erts_smp_thr_progress_block();
+ BIF_RET(lcnt_build_category_list(&term_heap_block, NULL, mask));
+ } else if(ERTS_IS_ATOM_STR("copy_save", BIF_ARG_1)) {
+ if(erts_lcnt_get_preserve_info()) {
+ BIF_RET(am_true);
+ }
- if (enable) res = erts_lcnt_set_rt_opt(lock_opt) ? am_true : am_false;
- else res = erts_lcnt_clear_rt_opt(lock_opt) ? am_true : am_false;
-
-#ifdef ERTS_SMP
- if (res != ptr[2] && lock_opt == ERTS_LCNT_OPT_PORTLOCK) {
- erts_lcnt_enable_io_lock_count(enable);
- } else if (res != ptr[2] && lock_opt == ERTS_LCNT_OPT_PROCLOCK) {
- erts_lcnt_enable_proc_lock_count(enable);
- }
+ BIF_RET(am_false);
+ }
#endif
- erts_smp_thr_progress_unblock();
- erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN);
- BIF_RET(res);
+ BIF_ERROR(BIF_P, BADARG);
+}
+
+BIF_RETTYPE erts_debug_lcnt_control_2(BIF_ALIST_2)
+{
+#ifdef ERTS_ENABLE_LOCK_COUNT
+ if(ERTS_IS_ATOM_STR("mask", BIF_ARG_1)) {
+ erts_lock_flags_t category_mask = 0;
+ Eterm categories = BIF_ARG_2;
+
+ if(!(is_list(categories) || is_nil(categories))) {
+ BIF_ERROR(BIF_P, BADARG);
}
- }
-#endif
+ while(is_list(categories)) {
+ Eterm *cell = list_val(categories);
+ erts_lock_flags_t category;
+
+ category = lcnt_atom_to_lock_category(CAR(cell));
+
+ if(!category) {
+ Eterm *hp = HAlloc(BIF_P, 4);
+
+ BIF_RET(TUPLE3(hp, am_error, am_badarg, CAR(cell)));
+ }
+
+ category_mask |= category;
+ categories = CDR(cell);
+ }
+
+ erts_lcnt_set_category_mask(category_mask);
+
+ BIF_RET(am_ok);
+ } else if(BIF_ARG_2 == am_true || BIF_ARG_2 == am_false) {
+ int enabled = (BIF_ARG_2 == am_true);
+
+ if(ERTS_IS_ATOM_STR("copy_save", BIF_ARG_1)) {
+ erts_lcnt_set_preserve_info(enabled);
+
+ BIF_RET(am_ok);
+ }
+ }
+#endif
BIF_ERROR(BIF_P, BADARG);
}
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