#include <lttng-abi-old.h>
#include <lttng-endian.h>
#include <wrapper/vzalloc.h>
+#include <wrapper/ringbuffer/backend.h>
+#include <wrapper/ringbuffer/frontend.h>
#define METADATA_CACHE_DEFAULT_SIZE 4096
kfree(session);
}
+int lttng_session_statedump(struct lttng_session *session)
+{
+ int ret;
+
+ mutex_lock(&sessions_mutex);
+ ret = lttng_statedump_start(session);
+ mutex_unlock(&sessions_mutex);
+ return ret;
+}
+
int lttng_session_enable(struct lttng_session *session)
{
int ret = 0;
/* We need to sync enablers with session before activation. */
lttng_session_sync_enablers(session);
+ /* Clear each stream's quiescent state. */
+ list_for_each_entry(chan, &session->chan, list) {
+ if (chan->channel_type != METADATA_CHANNEL)
+ lib_ring_buffer_clear_quiescent_channel(chan->chan);
+ }
+
ACCESS_ONCE(session->active) = 1;
ACCESS_ONCE(session->been_active) = 1;
ret = _lttng_session_metadata_statedump(session);
int lttng_session_disable(struct lttng_session *session)
{
int ret = 0;
+ struct lttng_channel *chan;
mutex_lock(&sessions_mutex);
if (!session->active) {
/* Set transient enabler state to "disabled" */
session->tstate = 0;
lttng_session_sync_enablers(session);
+
+ /* Set each stream's quiescent state. */
+ list_for_each_entry(chan, &session->chan, list) {
+ if (chan->channel_type != METADATA_CHANNEL)
+ lib_ring_buffer_set_quiescent_channel(chan->chan);
+ }
end:
mutex_unlock(&sessions_mutex);
return ret;
return ret;
}
+/*
+ * Must be called with sessions_mutex held.
+ */
+static
+int _lttng_variant_type_statedump(struct lttng_session *session,
+ const struct lttng_type *type,
+ size_t nesting)
+{
+ int ret;
+ uint32_t i, nr_choices;
+
+ ret = print_tabs(session, nesting);
+ if (ret)
+ return ret;
+ ret = lttng_metadata_printf(session,
+ "variant <_%s> {\n",
+ type->u.variant.tag_name);
+ if (ret)
+ return ret;
+ nr_choices = type->u.variant.nr_choices;
+ for (i = 0; i < nr_choices; i++) {
+ const struct lttng_event_field *iter_field;
+
+ iter_field = &type->u.variant.choices[i];
+ ret = _lttng_field_statedump(session, iter_field, nesting + 1);
+ if (ret)
+ return ret;
+ }
+ ret = print_tabs(session, nesting);
+ if (ret)
+ return ret;
+ ret = lttng_metadata_printf(session,
+ "}");
+ return ret;
+}
+
+/*
+ * Must be called with sessions_mutex held.
+ */
+static
+int _lttng_variant_statedump(struct lttng_session *session,
+ const struct lttng_event_field *field,
+ size_t nesting)
+{
+ int ret;
+
+ ret = _lttng_variant_type_statedump(session,
+ &field->type, nesting);
+ if (ret)
+ return ret;
+ ret = lttng_metadata_printf(session,
+ "_%s;\n",
+ field->name);
+ return ret;
+}
+
/*
* Must be called with sessions_mutex held.
*/
int ret;
const struct lttng_type *elem_type;
- /* Only array of structures are currently supported. */
+ /* Only array of structures and variants are currently supported. */
elem_type = field->type.u.array_compound.elem_type;
switch (elem_type->atype) {
case atype_struct:
if (ret)
return ret;
break;
+ case atype_variant:
+ ret = _lttng_variant_type_statedump(session, elem_type, nesting);
+ if (ret)
+ return ret;
+ break;
default:
return -EINVAL;
}
length_name = field->type.u.sequence_compound.length_name;
- /* Only array of structures are currently supported. */
+ /* Only array of structures and variants are currently supported. */
elem_type = field->type.u.sequence_compound.elem_type;
switch (elem_type->atype) {
case atype_struct:
if (ret)
return ret;
break;
+ case atype_variant:
+ ret = _lttng_variant_type_statedump(session, elem_type, nesting);
+ if (ret)
+ return ret;
+ break;
default:
return -EINVAL;
}
return ret;
}
+/*
+ * Must be called with sessions_mutex held.
+ */
+static
+int _lttng_enum_statedump(struct lttng_session *session,
+ const struct lttng_event_field *field,
+ size_t nesting)
+{
+ const struct lttng_enum_desc *enum_desc;
+ const struct lttng_integer_type *container_type;
+ int ret;
+ unsigned int i, nr_entries;
+
+ enum_desc = field->type.u.basic.enumeration.desc;
+ container_type = &field->type.u.basic.enumeration.container_type;
+ nr_entries = enum_desc->nr_entries;
+
+ ret = print_tabs(session, nesting);
+ if (ret)
+ goto end;
+ ret = lttng_metadata_printf(session,
+ "enum : integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } {\n",
+ container_type->size,
+ container_type->alignment,
+ container_type->signedness,
+ (container_type->encoding == lttng_encode_none)
+ ? "none"
+ : (container_type->encoding == lttng_encode_UTF8)
+ ? "UTF8"
+ : "ASCII",
+ container_type->base,
+#if __BYTE_ORDER == __BIG_ENDIAN
+ container_type->reverse_byte_order ? " byte_order = le;" : ""
+#else
+ container_type->reverse_byte_order ? " byte_order = be;" : ""
+#endif
+ );
+ if (ret)
+ goto end;
+ /* Dump all entries */
+ for (i = 0; i < nr_entries; i++) {
+ const struct lttng_enum_entry *entry = &enum_desc->entries[i];
+ int j, len;
+
+ ret = print_tabs(session, nesting + 1);
+ if (ret)
+ goto end;
+ ret = lttng_metadata_printf(session,
+ "\"");
+ if (ret)
+ goto end;
+ len = strlen(entry->string);
+ /* Escape the character '"' */
+ for (j = 0; j < len; j++) {
+ char c = entry->string[j];
+
+ switch (c) {
+ case '"':
+ ret = lttng_metadata_printf(session,
+ "\\\"");
+ break;
+ case '\\':
+ ret = lttng_metadata_printf(session,
+ "\\\\");
+ break;
+ default:
+ ret = lttng_metadata_printf(session,
+ "%c", c);
+ break;
+ }
+ if (ret)
+ goto end;
+ }
+ ret = lttng_metadata_printf(session, "\"");
+ if (ret)
+ goto end;
+
+ if (entry->options.is_auto) {
+ ret = lttng_metadata_printf(session, ",\n");
+ if (ret)
+ goto end;
+ } else {
+ ret = lttng_metadata_printf(session,
+ " = ");
+ if (ret)
+ goto end;
+ if (entry->start.signedness)
+ ret = lttng_metadata_printf(session,
+ "%lld", (long long) entry->start.value);
+ else
+ ret = lttng_metadata_printf(session,
+ "%llu", entry->start.value);
+ if (ret)
+ goto end;
+ if (entry->start.signedness == entry->end.signedness &&
+ entry->start.value
+ == entry->end.value) {
+ ret = lttng_metadata_printf(session,
+ ",\n");
+ } else {
+ if (entry->end.signedness) {
+ ret = lttng_metadata_printf(session,
+ " ... %lld,\n",
+ (long long) entry->end.value);
+ } else {
+ ret = lttng_metadata_printf(session,
+ " ... %llu,\n",
+ entry->end.value);
+ }
+ }
+ if (ret)
+ goto end;
+ }
+ }
+ ret = print_tabs(session, nesting);
+ if (ret)
+ goto end;
+ ret = lttng_metadata_printf(session, "} _%s;\n",
+ field->name);
+end:
+ return ret;
+}
+
/*
* Must be called with sessions_mutex held.
*/
field->name);
break;
case atype_enum:
- ret = print_tabs(session, nesting);
- if (ret)
- return ret;
- ret = lttng_metadata_printf(session,
- "%s _%s;\n",
- field->type.u.basic.enumeration.name,
- field->name);
+ ret = _lttng_enum_statedump(session, field, nesting);
break;
case atype_array:
{
case atype_sequence_compound:
ret = _lttng_sequence_compound_statedump(session, field, nesting);
break;
+ case atype_variant:
+ ret = _lttng_variant_statedump(session, field, nesting);
+ break;
default:
WARN_ON_ONCE(1);
/* Disable interrupts to increase correlation precision. */
local_irq_save(flags);
monotonic[0] = trace_clock_read64();
- getnstimeofday(&rts);
+ getnstimeofday(&rts);
monotonic[1] = trace_clock_read64();
local_irq_restore(flags);
if (ret)
return ret;
ret = wrapper_get_pageblock_flags_mask_init();
+ if (ret)
+ return ret;
+ ret = lttng_probes_init();
if (ret)
return ret;
ret = lttng_context_init();
projects / deliverable / lttng-modules.git / blobdiff