X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=sidebyside;f=ltt-events.c;h=20db4c55bdc75703a8fad2b7016a38887ae768c1;hb=833ad6a0c344849269df6875f40c3d7cb21529d3;hp=1aadd9f37faffafef8776bf23abc5d4726238693;hpb=1ec3f75aca46d4196d4d7dbbbe0b791f663203f1;p=lttng-modules.git diff --git a/ltt-events.c b/ltt-events.c index 1aadd9f3..20db4c55 100644 --- a/ltt-events.c +++ b/ltt-events.c @@ -22,6 +22,8 @@ static LIST_HEAD(ltt_transport_list); static DEFINE_MUTEX(sessions_mutex); static struct kmem_cache *event_cache; +static void _ltt_event_destroy(struct ltt_event *event); +static int _ltt_event_unregister(struct ltt_event *event); static int _ltt_event_metadata_statedump(struct ltt_session *session, struct ltt_channel *chan, @@ -166,7 +168,7 @@ struct ltt_channel *ltt_channel_create(struct ltt_session *session, goto nomem; chan->session = session; init_waitqueue_head(&chan->notify_wait); - chan->chan = transport->ops.channel_create("[lttng]", session, buf_addr, + chan->chan = transport->ops.channel_create("[lttng]", chan, buf_addr, subbuf_size, num_subbuf, switch_timer_interval, read_timer_interval); if (!chan->chan) @@ -200,8 +202,7 @@ void _ltt_channel_destroy(struct ltt_channel *chan) * Supports event creation while tracing session is active. */ struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name, - enum instrum_type itype, - const struct lttng_event_desc *event_desc, + struct lttng_kernel_event *event_param, void *filter) { struct ltt_event *event; @@ -221,16 +222,35 @@ struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name, if (!event) goto cache_error; event->chan = chan; - event->desc = event_desc; event->filter = filter; event->id = chan->free_event_id++; - event->itype = itype; + event->instrumentation = event_param->instrumentation; /* Populate ltt_event structure before tracepoint registration. */ smp_wmb(); - switch (itype) { - case INSTRUM_TRACEPOINTS: - ret = tracepoint_probe_register(name, event_desc->probe_callback, - event); + switch (event_param->instrumentation) { + case LTTNG_KERNEL_TRACEPOINTS: + event->desc = ltt_event_get(name); + if (!event->desc) + goto register_error; + ret = tracepoint_probe_register(name, + event->desc->probe_callback, + event); + if (ret) + goto register_error; + break; + case LTTNG_KERNEL_KPROBES: + ret = lttng_kprobes_register(name, + event_param->u.kprobe.symbol_name, + event_param->u.kprobe.offset, + event_param->u.kprobe.addr, + event); + if (ret) + goto register_error; + break; + case LTTNG_KERNEL_FUNCTION_TRACER: + ret = lttng_ftrace_register(name, + event_param->u.ftrace.symbol_name, + event); if (ret) goto register_error; break; @@ -245,8 +265,10 @@ struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name, return event; statedump_error: - WARN_ON_ONCE(tracepoint_probe_unregister(name, event_desc->probe_callback, - event)); + WARN_ON_ONCE(tracepoint_probe_unregister(name, + event->desc->probe_callback, + event)); + ltt_event_put(event->desc); register_error: kmem_cache_free(event_cache, event); cache_error: @@ -263,13 +285,22 @@ int _ltt_event_unregister(struct ltt_event *event) { int ret = -EINVAL; - switch (event->itype) { - case INSTRUM_TRACEPOINTS: + switch (event->instrumentation) { + case LTTNG_KERNEL_TRACEPOINTS: ret = tracepoint_probe_unregister(event->desc->name, event->desc->probe_callback, event); if (ret) return ret; + ltt_event_put(event->desc); + break; + case LTTNG_KERNEL_KPROBES: + lttng_kprobes_unregister(event); + ret = 0; + break; + case LTTNG_KERNEL_FUNCTION_TRACER: + lttng_ftrace_unregister(event); + ret = 0; break; default: WARN_ON_ONCE(1); @@ -277,9 +308,23 @@ int _ltt_event_unregister(struct ltt_event *event) return ret; } +/* + * Used when an event FD is released. + */ +int ltt_event_unregister(struct ltt_event *event) +{ + int ret; + + mutex_lock(&sessions_mutex); + ret = ltt_event_unregister(event); + mutex_unlock(&sessions_mutex); + return ret; +} + /* * Only used internally at session destruction. */ +static void _ltt_event_destroy(struct ltt_event *event) { ltt_event_put(event->desc); @@ -362,10 +407,16 @@ int _ltt_fields_metadata_statedump(struct ltt_session *session, switch (field->type.atype) { case atype_integer: ret = lttng_metadata_printf(session, - " integer { size = %u; align = %u; signed = %u;%s } %s;\n", + " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } %s;\n", field->type.u.basic.integer.size, field->type.u.basic.integer.alignment, field->type.u.basic.integer.signedness, + (field->type.u.basic.integer.encoding == lttng_encode_none) + ? "none" + : (field->type.u.basic.integer.encoding == lttng_encode_UTF8) + ? "UTF8" + : "ASCII", + field->type.u.basic.integer.base, #ifdef __BIG_ENDIAN field->type.u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", #else @@ -385,10 +436,16 @@ int _ltt_fields_metadata_statedump(struct ltt_session *session, elem_type = &field->type.u.array.elem_type; ret = lttng_metadata_printf(session, - " integer { size = %u; align = %u; signed = %u;%s } %s[%u];\n", + " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } %s[%u];\n", elem_type->u.basic.integer.size, elem_type->u.basic.integer.alignment, elem_type->u.basic.integer.signedness, + (elem_type->u.basic.integer.encoding == lttng_encode_none) + ? "none" + : (elem_type->u.basic.integer.encoding == lttng_encode_UTF8) + ? "UTF8" + : "ASCII", + elem_type->u.basic.integer.base, #ifdef __BIG_ENDIAN elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", #else @@ -405,29 +462,46 @@ int _ltt_fields_metadata_statedump(struct ltt_session *session, elem_type = &field->type.u.sequence.elem_type; length_type = &field->type.u.sequence.length_type; ret = lttng_metadata_printf(session, - " integer { size = %u; align = %u; signed = %u;%s } %s[ integer { size = %u; align = %u; signed = %u;%s } ];\n", + " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", + " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } %s[ __%s_length ];\n", + length_type->u.basic.integer.size, + length_type->u.basic.integer.alignment, + length_type->u.basic.integer.signedness, + (length_type->u.basic.integer.encoding == lttng_encode_none) + ? "none" + : (length_type->u.basic.integer.encoding == lttng_encode_UTF8) + ? "UTF8" + : "ASCII", + length_type->u.basic.integer.base, +#ifdef __BIG_ENDIAN + length_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", +#else + length_type->u.basic.integer.reverse_byte_order +? " byte_order = be;" : "", +#endif + field->name, elem_type->u.basic.integer.size, elem_type->u.basic.integer.alignment, elem_type->u.basic.integer.signedness, + (elem_type->u.basic.integer.encoding == lttng_encode_none) + ? "none" + : (elem_type->u.basic.integer.encoding == lttng_encode_UTF8) + ? "UTF8" + : "ASCII", + elem_type->u.basic.integer.base, #ifdef __BIG_ENDIAN elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", #else elem_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", #endif field->name, - length_type->u.basic.integer.size, - length_type->u.basic.integer.alignment, - length_type->u.basic.integer.signedness, -#ifdef __BIG_ENDIAN - length_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", -#else - length_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "" -#endif + field->name ); break; } case atype_string: + /* Default encoding is UTF8 */ ret = lttng_metadata_printf(session, " string%s %s;\n", field->type.u.basic.string.encoding == lttng_encode_ASCII ? @@ -475,8 +549,8 @@ int _ltt_event_metadata_statedump(struct ltt_session *session, * byte size. */ ret = lttng_metadata_printf(session, - " } aligned(%u);\n" - "};\n\n", ltt_get_header_alignment()); + " };\n" + "};\n\n"); if (ret) goto end; @@ -504,7 +578,8 @@ int _ltt_channel_metadata_statedump(struct ltt_session *session, ret = lttng_metadata_printf(session, "stream {\n" " id = %u;\n" - " event.header := %s;\n", + " event.header := %s;\n" + " packet.context := struct packet_context;\n" "};\n\n", chan->id, chan->header_type == 1 ? "struct event_header_compact" : @@ -517,6 +592,64 @@ end: return ret; } +static +int _ltt_stream_packet_context_declare(struct ltt_session *session) +{ + return lttng_metadata_printf(session, + "struct packet_context {\n" + " uint64_t timestamp_begin;\n" + " uint64_t timestamp_end;\n" + " uint32_t events_discarded;\n" + " uint32_t content_size;\n" + " uint32_t packet_size;\n" + " uint32_t cpu_id;\n" + "};\n" + ); +} + +/* + * Compact header: + * id: range: 0 - 30. + * id 31 is reserved to indicate an extended header. + * + * Large header: + * id: range: 0 - 65534. + * id 65535 is reserved to indicate an extended header. + */ +static +int _ltt_event_header_declare(struct ltt_session *session) +{ + return lttng_metadata_printf(session, + "struct event_header_compact {\n" + " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" + " variant {\n" + " struct {\n" + " uint27_t timestamp;\n" + " } compact;\n" + " struct {\n" + " uint32_t id;\n" + " uint64_t timestamp;\n" + " } extended;\n" + " } v;\n" + "} align(%u);\n" + "\n" + "struct event_header_large {\n" + " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" + " variant {\n" + " struct {\n" + " uint32_t timestamp;\n" + " } compact;\n" + " struct {\n" + " uint32_t id;\n" + " uint64_t timestamp;\n" + " } extended;\n" + " } v;\n" + "} align(%u);\n\n", + ltt_alignof(uint32_t) * CHAR_BIT, + ltt_alignof(uint16_t) * CHAR_BIT + ); +} + /* * Output metadata into this session's metadata buffers. */ @@ -545,9 +678,12 @@ int _ltt_session_metadata_statedump(struct ltt_session *session) uuid_s[12], uuid_s[13], uuid_s[14], uuid_s[15]); ret = lttng_metadata_printf(session, - "typealias integer {size = 8; align = %u; signed = false; } := uint8_t;\n" - "typealias integer {size = 32; align = %u; signed = false; } := uint32_t;\n" - "typealias integer {size = 64; align = %u; signed = false; } := uint64_t;\n" + "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" + "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" + "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" + "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" + "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" + "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" "\n" "trace {\n" " major = %u;\n" @@ -558,11 +694,6 @@ int _ltt_session_metadata_statedump(struct ltt_session *session) " uint32_t magic;\n" " uint8_t uuid[16];\n" " uint32_t stream_id;\n" - " uint64_t timestamp_begin;\n" - " uint64_t timestamp_end;\n" - " uint32_t content_size;\n" - " uint32_t packet_size;\n" - " uint32_t events_lost;\n" " };\n", "};\n\n", ltt_alignof(uint8_t) * CHAR_BIT, @@ -580,6 +711,14 @@ int _ltt_session_metadata_statedump(struct ltt_session *session) if (ret) goto end; + ret = _ltt_stream_packet_context_declare(session); + if (ret) + goto end; + + ret = _ltt_event_header_declare(session); + if (ret) + goto end; + skip_session: list_for_each_entry(chan, &session->chan, list) { ret = _ltt_channel_metadata_statedump(session, chan);