-#include <lttng.h>
-#include <lttng-types.h>
+/*
+ * lttng-events.h
+ *
+ * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
+ * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/uaccess.h>
#include <linux/debugfs.h>
+#include <linux/rculist.h>
+#include "lttng.h"
+#include "lttng-types.h"
+#include "lttng-probe-user.h"
#include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
#include "../wrapper/ringbuffer/frontend_types.h"
-#include "../ltt-events.h"
-#include "../ltt-tracer-core.h"
-
-struct lttng_event_field {
- const char *name;
- const struct lttng_type type;
-};
-
-struct lttng_event_desc {
- const struct lttng_event_field *fields;
- const char *name;
- void *probe_callback;
- unsigned int nr_fields;
-};
+#include "../lttng-events.h"
+#include "../lttng-tracer-core.h"
/*
* Macro declarations used for all stages.
*/
/*
- * DECLARE_EVENT_CLASS can be used to add a generic function
- * handlers for events. That is, if all events have the same
- * parameters and just have distinct trace points.
- * Each tracepoint can be defined with DEFINE_EVENT and that
- * will map the DECLARE_EVENT_CLASS to the tracepoint.
+ * LTTng name mapping macros. LTTng remaps some of the kernel events to
+ * enforce name-spacing.
+ */
+#undef LTTNG_TRACEPOINT_EVENT_MAP
+#define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS(map, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(fields)) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
+
+#undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \
+ PARAMS(fields)) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map)
+
+#undef LTTNG_TRACEPOINT_EVENT_CODE_MAP
+#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code, fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(_locvar), \
+ PARAMS(_code), \
+ PARAMS(fields)) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
+
+#undef LTTNG_TRACEPOINT_EVENT_CODE
+#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, fields) \
+ LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(_locvar), \
+ PARAMS(_code), \
+ PARAMS(fields))
+
+/*
+ * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function
+ * handlers for events. That is, if all events have the same parameters
+ * and just have distinct trace points. Each tracepoint can be defined
+ * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the
+ * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint.
*
- * TRACE_EVENT is a one to one mapping between tracepoint and template.
+ * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and
+ * template.
*/
-#undef TRACE_EVENT
-#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
- DECLARE_EVENT_CLASS(name, \
- PARAMS(proto), \
- PARAMS(args), \
- PARAMS(tstruct), \
- PARAMS(assign), \
- PARAMS(print)) \
- DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args))
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-/* Callbacks are meaningless to LTTng. */
-#undef TRACE_EVENT_FN
-#define TRACE_EVENT_FN(name, proto, args, tstruct, \
- assign, print, reg, unreg) \
- TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
- PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
+#undef LTTNG_TRACEPOINT_EVENT
+#define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \
+ LTTNG_TRACEPOINT_EVENT_MAP(name, name, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(fields))
+
+#undef LTTNG_TRACEPOINT_EVENT_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \
+ LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields))
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args))
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name)
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS
+#define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \
+ PARAMS(_fields))
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields))
+
/*
- * Stage 0.1 of the trace events.
+ * Stage 1 of the trace events.
*
* Create dummy trace calls for each events, verifying that the LTTng module
- * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the
- * compiler.
+ * instrumentation headers match the kernel arguments. Will be optimized
+ * out by the compiler.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
#undef TP_PROTO
-#define TP_PROTO(args...) args
+#define TP_PROTO(...) __VA_ARGS__
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(_template, _name, _proto, _args) \
-void trace_##_name(proto);
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
+void trace_##_name(_proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+void trace_##_name(void *__data);
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Stage 1 of the trace events.
+ * Stage 2 of the trace events.
*
* Create event field type metadata section.
* Each event produce an array of fields.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __field
-#define __field(_type, _item) \
- { .name = #_item, .type = { .atype = atype_integer, .name = #_type} },
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#include "lttng-events-write.h"
+#include "lttng-events-nowrite.h"
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
+ { \
+ .name = #_item, \
+ .type = __type_integer(_type, _byte_order, _base, none),\
+ .nowrite = _nowrite, \
+ .user = _user, \
+ },
-#undef __array
-#define __array(_type, _item, _length) \
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
{ \
- .name = #_item, \
- .type = { \
+ .name = #_item, \
+ .type = \
+ { \
.atype = atype_array, \
- .name = NULL, \
- .u.array.elem_type = #_type, \
- .u.array.length = _length, \
+ .u = \
+ { \
+ .array = \
+ { \
+ .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \
+ .length = _length, \
+ } \
+ } \
}, \
+ .nowrite = _nowrite, \
+ .user = _user, \
},
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, \
+ _length_type, _src_length, _encoding, \
+ _base, _user, _nowrite) \
{ \
- .name = #_item, \
- .type = { \
+ .name = #_item, \
+ .type = \
+ { \
.atype = atype_sequence, \
- .name = NULL, \
- .u.sequence.elem_type = #_type, \
- .u.sequence.length_type = "u32", \
+ .u = \
+ { \
+ .sequence = \
+ { \
+ .length_type = __type_integer(_length_type, __BYTE_ORDER, 10, none), \
+ .elem_type = __type_integer(_type, __BYTE_ORDER, _base, _encoding), \
+ }, \
+ }, \
}, \
+ .nowrite = _nowrite, \
+ .user = _user, \
},
-#undef __string
-#define __string(_item, _src) \
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite) \
{ \
- .name = #_item, \
- .type = { \
+ .name = #_item, \
+ .type = \
+ { \
.atype = atype_string, \
- .name = NULL, \
- .u.string.encoding = lttng_encode_UTF8, \
+ .u = \
+ { \
+ .basic = { .string = { .encoding = lttng_encode_UTF8 } } \
+ }, \
}, \
+ .nowrite = _nowrite, \
+ .user = _user, \
},
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args /* Only one used in this phase */
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
static const struct lttng_event_field __event_fields___##_name[] = { \
- _tstruct \
+ _fields \
};
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, PARAMS(_fields))
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Stage 1.1 of the trace events.
+ * Stage 3 of the trace events.
*
* Create probe callback prototypes.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
#undef TP_PROTO
-#define TP_PROTO(args...) args
+#define TP_PROTO(...) __VA_ARGS__
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
static void __event_probe__##_name(void *__data, _proto);
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static void __event_probe__##_name(void *__data);
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Stage 2 of the trace events.
+ * Stage 4 of the trace events.
*
- * Create an array of events.
+ * Create static inline function that calculates event size.
*/
-/* Named field types must be defined in lttng-types.h */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#include "lttng-events-write.h"
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(_template, _name, _proto, _args) \
- { \
- .fields = __event_fields___##_template, \
- .name = #_name, \
- .probe_callback = (void *) &__event_probe__##_template,\
- .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
- },
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
+ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
+ __event_len += sizeof(_type);
-#define TP_ID1(_token, _system) _token##_system
-#define TP_ID(_token, _system) TP_ID1(_token, _system)
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
+ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
+ __event_len += sizeof(_type) * (_length);
-static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = {
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-};
-
-#undef TP_ID1
-#undef TP_ID
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _base, _user, _nowrite) \
+ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
+ __event_len += sizeof(_length_type); \
+ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
+ __dynamic_len[__dynamic_len_idx] = (_src_length); \
+ __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
+ __dynamic_len_idx++;
/*
- * Stage 3 of the trace events.
- *
- * Create seq file metadata output.
+ * ctf_user_string includes \0. If returns 0, it faulted, so we set size to
+ * 1 (\0 only).
*/
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite) \
+ if (_user) \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = \
+ strlen(_src) + 1; \
+ else \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = \
+ max_t(size_t, lttng_strlen_user_inatomic(_src), 1);
-#define TP_ID1(_token, _system) _token##_system
-#define TP_ID(_token, _system) TP_ID1(_token, _system)
-
-static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m,
- loff_t *pos)
-{
- const struct lttng_event_desc *desc =
- &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos];
-
- if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM)
- [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1])
- return NULL;
- return (void *) desc;
-}
-
-static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m,
- void *p, loff_t *ppos)
-{
- const struct lttng_event_desc *desc =
- &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)];
-
- if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM)
- [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1])
- return NULL;
- return (void *) desc;
-}
-
-static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m,
- void *p)
-{
-}
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m,
- void *p)
-{
- const struct lttng_event_desc *desc = p;
- int i;
-
- seq_printf(m, "event {\n"
- "\tname = %s;\n"
- "\tid = UNKNOWN;\n"
- "\tstream = UNKNOWN;\n"
- "\tfields = {\n",
- desc->name);
- for (i = 0; i < desc->nr_fields; i++) {
- if (desc->fields[i].type.name) /* Named type */
- seq_printf(m, "\t\t%s",
- desc->fields[i].type.name);
- else /* Nameless type */
- lttng_print_event_type(m, 2, &desc->fields[i].type);
- seq_printf(m, " %s;\n", desc->fields[i].name);
- }
- seq_printf(m, "\t};\n");
- seq_printf(m, "};\n");
- return 0;
-}
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
-static const
-struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = {
- .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM),
- .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM),
- .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM),
- .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM),
-};
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
-static int
-TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file)
-{
- return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM));
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \
+ void *__tp_locvar, _proto) \
+{ \
+ size_t __event_len = 0; \
+ unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+ return __event_len; \
}
-static const
-struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = {
- .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM),
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
-};
-
-static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM);
-
-static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void)
-{
- int ret = 0;
-
- TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) =
- debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM),
- S_IWUSR, NULL, NULL,
- &TP_ID(__lttng_types_fops__, TRACE_SYSTEM));
- if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM))
- || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) {
- printk(KERN_ERR "Error creating LTTng type export file\n");
- ret = -ENOMEM;
- goto error;
- }
-error:
- return ret;
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \
+ void *__tp_locvar) \
+{ \
+ size_t __event_len = 0; \
+ unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+ return __event_len; \
}
-static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void)
-{
- debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM));
-}
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#undef TP_ID1
-#undef TP_ID
/*
- * Stage 4 of the trace events.
+ * Stage 4.1 of tracepoint event generation.
*
- * Create static inline function that calculates event size.
+ * Create static inline function that layout the filter stack data.
+ * We make both write and nowrite data available to the filter.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#include "lttng-events-write.h"
+#include "lttng-events-nowrite.h"
+
+#undef _ctf_integer_ext_fetched
+#define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
+ if (lttng_is_signed_type(_type)) { \
+ int64_t __ctf_tmp_int64; \
+ switch (sizeof(_type)) { \
+ case 1: \
+ { \
+ union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 2: \
+ { \
+ union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 4: \
+ { \
+ union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 8: \
+ { \
+ union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ default: \
+ BUG_ON(1); \
+ }; \
+ memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
+ } else { \
+ uint64_t __ctf_tmp_uint64; \
+ switch (sizeof(_type)) { \
+ case 1: \
+ { \
+ union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 2: \
+ { \
+ union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 4: \
+ { \
+ union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 8: \
+ { \
+ union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ default: \
+ BUG_ON(1); \
+ }; \
+ memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
+ } \
+ __stack_data += sizeof(int64_t);
+
+#undef _ctf_integer_ext_isuser0
+#define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \
+ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite)
+
+#undef _ctf_integer_ext_isuser1
+#define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \
+{ \
+ __typeof__(_user_src) _src; \
+ if (get_user(_src, &(_user_src))) \
+ _src = 0; \
+ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
+}
-#undef __field
-#define __field(_type, _item) \
- __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
- __event_len += sizeof(_type);
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \
+ _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite)
+
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
+ { \
+ unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
+ const void *__ctf_tmp_ptr = (_src); \
+ memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
+ __stack_data += sizeof(unsigned long); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
+ __stack_data += sizeof(void **); \
+ }
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _base, _user, _nowrite) \
+ { \
+ unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
+ const void *__ctf_tmp_ptr = (_src); \
+ memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
+ __stack_data += sizeof(unsigned long); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
+ __stack_data += sizeof(void **); \
+ }
-#undef __array
-#define __array(_type, _item, _length) \
- __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
- __event_len += sizeof(_type) * (_length);
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite) \
+ { \
+ const void *__ctf_tmp_ptr = (_src); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
+ __stack_data += sizeof(void **); \
+ }
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
- __event_len += lib_ring_buffer_align(__event_len, __alignof__(u32)); \
- __event_len += sizeof(u32); \
- __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
- __event_len += sizeof(_type) * (_length);
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#undef __string
-#define __string(_item, _src) \
- __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static inline \
+void __event_prepare_filter_stack__##_name(char *__stack_data, \
+ void *__tp_locvar) \
+{ \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+}
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+static inline \
+void __event_prepare_filter_stack__##_name(char *__stack_data, \
+ void *__tp_locvar, _proto) \
{ \
- size_t __event_len = 0; \
- unsigned int __dynamic_len_idx = 0; \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
\
- if (0) \
- (void) __dynamic_len_idx; /* don't warn if unused */ \
- _tstruct \
- return __event_len; \
+ _fields \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-
/*
* Stage 5 of the trace events.
*
* Create static inline function that calculates event payload alignment.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#include "lttng-events-write.h"
-/* Named field types must be defined in lttng-types.h */
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
+ __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
-#undef __field
-#define __field(_type, _item) \
- __event_align = max_t(size_t, __event_align, __alignof__(_type));
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
+ __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _base, _user, _nowrite) \
+ __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \
+ __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
-#undef __array
-#define __array(_type, _item, _length) \
- __event_align = max_t(size_t, __event_align, __alignof__(_type));
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite)
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
- __event_align = max_t(size_t, __event_align, __alignof__(u32)); \
- __event_align = max_t(size_t, __event_align, __alignof__(_type));
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#undef __string
-#define __string(_item, _src)
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \
+{ \
+ size_t __event_align = 1; \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+ return __event_align; \
+}
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static inline size_t __event_get_align__##_name(_proto) \
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static inline size_t __event_get_align__##_name(void *__tp_locvar) \
{ \
size_t __event_align = 1; \
- _tstruct \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
return __event_align; \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
/*
- * Stage 6 of the trace events.
+ * Stage 6 of tracepoint event generation.
*
- * Create structure declaration that allows the "assign" macros to access the
- * field types.
+ * Create the probe function. This function calls event size calculation
+ * and writes event data into the buffer.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#include "lttng-events-write.h"
-/* Named field types must be defined in lttng-types.h */
+#undef _ctf_integer_ext_fetched
+#define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
+ { \
+ _type __tmp = _src; \
+ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
+ __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
+ }
+
+#undef _ctf_integer_ext_isuser0
+#define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \
+ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite)
+
+#undef _ctf_integer_ext_isuser1
+#define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \
+{ \
+ __typeof__(_user_src) _src; \
+ if (get_user(_src, &(_user_src))) \
+ _src = 0; \
+ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
+}
+
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \
+ _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite)
+
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
+ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
+ if (_user) { \
+ __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \
+ } else { \
+ __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \
+ }
+
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _base, _user, _nowrite) \
+ { \
+ _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
+ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
+ __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
+ } \
+ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
+ if (_user) { \
+ __chan->ops->event_write_from_user(&__ctx, _src, \
+ sizeof(_type) * __get_dynamic_len(dest)); \
+ } else { \
+ __chan->ops->event_write(&__ctx, _src, \
+ sizeof(_type) * __get_dynamic_len(dest)); \
+ }
-#undef __field
-#define __field(_type, _item) _type _item;
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite) \
+ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \
+ if (_user) { \
+ __chan->ops->event_strcpy_from_user(&__ctx, _src, \
+ __get_dynamic_len(dest)); \
+ } else { \
+ __chan->ops->event_strcpy(&__ctx, _src, \
+ __get_dynamic_len(dest)); \
+ }
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
+/* Beware: this get len actually consumes the len value */
+#undef __get_dynamic_len
+#define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
-#undef __array
-#define __array(_type, _item, _length) _type _item;
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) _type _item;
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
-#undef __string
-#define __string(_item, _src) char _item;
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-struct __event_typemap__##_name { \
- _tstruct \
-};
+#undef TP_code
+#define TP_code(...) __VA_ARGS__
+
+/*
+ * For state dump, check that "session" argument (mandatory) matches the
+ * session this event belongs to. Ensures that we write state dump data only
+ * into the started session, not into all sessions.
+ */
+#ifdef TP_SESSION_CHECK
+#define _TP_SESSION_CHECK(session, csession) (session == csession)
+#else /* TP_SESSION_CHECK */
+#define _TP_SESSION_CHECK(session, csession) 1
+#endif /* TP_SESSION_CHECK */
+
+/*
+ * Using twice size for filter stack data to hold size and pointer for
+ * each field (worse case). For integers, max size required is 64-bit.
+ * Same for double-precision floats. Those fit within
+ * 2*sizeof(unsigned long) for all supported architectures.
+ * Perform UNION (||) of filter runtime list.
+ */
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+static void __event_probe__##_name(void *__data, _proto) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event *__event = __data; \
+ struct lttng_channel *__chan = __event->chan; \
+ struct lttng_session *__session = __chan->session; \
+ struct lib_ring_buffer_ctx __ctx; \
+ size_t __event_len, __event_align; \
+ size_t __dynamic_len_idx __attribute__((unused)) = 0; \
+ union { \
+ size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \
+ char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
+ } __stackvar; \
+ int __ret; \
+ struct probe_local_vars __tp_locvar; \
+ struct probe_local_vars *tp_locvar __attribute__((unused)) = \
+ &__tp_locvar; \
+ struct lttng_pid_tracker *__lpf; \
+ \
+ if (!_TP_SESSION_CHECK(session, __session)) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__session->active))) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__event->enabled))) \
+ return; \
+ __lpf = rcu_dereference(__session->pid_tracker); \
+ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
+ return; \
+ _code \
+ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *bc_runtime; \
+ int __filter_record = __event->has_enablers_without_bytecode; \
+ \
+ __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
+ tp_locvar, _args); \
+ list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->filter(bc_runtime, \
+ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ return; \
+ } \
+ __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \
+ tp_locvar, _args); \
+ __event_align = __event_get_align__##_name(tp_locvar, _args); \
+ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ return; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
+}
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static void __event_probe__##_name(void *__data) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event *__event = __data; \
+ struct lttng_channel *__chan = __event->chan; \
+ struct lttng_session *__session = __chan->session; \
+ struct lib_ring_buffer_ctx __ctx; \
+ size_t __event_len, __event_align; \
+ size_t __dynamic_len_idx __attribute__((unused)) = 0; \
+ union { \
+ size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \
+ char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
+ } __stackvar; \
+ int __ret; \
+ struct probe_local_vars __tp_locvar; \
+ struct probe_local_vars *tp_locvar __attribute__((unused)) = \
+ &__tp_locvar; \
+ struct lttng_pid_tracker *__lpf; \
+ \
+ if (!_TP_SESSION_CHECK(session, __session)) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__session->active))) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
+ return; \
+ if (unlikely(!ACCESS_ONCE(__event->enabled))) \
+ return; \
+ __lpf = rcu_dereference(__session->pid_tracker); \
+ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
+ return; \
+ _code \
+ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *bc_runtime; \
+ int __filter_record = __event->has_enablers_without_bytecode; \
+ \
+ __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
+ tp_locvar); \
+ list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->filter(bc_runtime, \
+ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ return; \
+ } \
+ __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \
+ __event_align = __event_get_align__##_name(tp_locvar); \
+ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ return; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
+}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef __get_dynamic_len
/*
* Stage 7 of the trace events.
*
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
- *
- * We use both the field and assignment macros to write the fields in the order
- * defined in the field declaration. The field declarations control the
- * execution order, jumping to the appropriate assignment block.
+ * Create event descriptions.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-#undef __field
-#define __field(_type, _item) \
- goto __assign_##_item; \
-__end_field_##_item:
-
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
+/* Named field types must be defined in lttng-types.h */
-#undef __array
-#define __array(_type, _item, _length) \
- goto __assign_##_item; \
-__end_field_##_item:
+#include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
+
+#ifndef TP_PROBE_CB
+#define TP_PROBE_CB(_template) &__event_probe__##_template
+#endif
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+static const struct lttng_event_desc __event_desc___##_map = { \
+ .fields = __event_fields___##_template, \
+ .name = #_map, \
+ .kname = #_name, \
+ .probe_callback = (void *) TP_PROBE_CB(_template), \
+ .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
+ .owner = THIS_MODULE, \
+};
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
- goto __assign_##_item##_1; \
-__end_field_##_item##_1: \
- goto __assign_##_item##_2; \
-__end_field_##_item##_2:
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map)
-#undef __string
-#define __string(_item, _src) \
- goto __assign_##_item; \
-__end_field_##_item:
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
- * strcpy().
+ * Stage 8 of the trace events.
+ *
+ * Create an array of event description pointers.
*/
-#undef tp_assign
-#define tp_assign(dest, src) \
-__assign_##dest: \
- { \
- __typeof__(__typemap.dest) __tmp = (src); \
- lib_ring_buffer_align_ctx(&ctx, __alignof__(__tmp)); \
- __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \
- } \
- goto __end_field_##dest;
-
-#undef tp_memcpy
-#define tp_memcpy(dest, src, len) \
-__assign_##dest: \
- lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \
- __chan->ops->event_write(&ctx, src, len); \
- goto __end_field_##dest;
-
-#undef tp_memcpy_dyn
-#define tp_memcpy_dyn(dest, src, len) \
-__assign_##dest##_1: \
- { \
- u32 __tmpl = (len); \
- lib_ring_buffer_align_ctx(&ctx, __alignof__(u32)); \
- __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \
- } \
- goto __end_field_##dest##_1; \
-__assign_##dest##_2: \
- lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \
- __chan->ops->event_write(&ctx, src, len); \
- goto __end_field_##dest##_2;
-#undef tp_strcpy
-#define tp_strcpy(dest, src) \
- tp_memcpy(dest, src, __get_dynamic_array_len(dest))
+#include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
-/* Named field types must be defined in lttng-types.h */
-
-#undef __get_str
-#define __get_str(field) field
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+ &__event_desc___##_map,
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) field
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
+ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map)
-/* Beware: this get len actually consumes the len value */
-#undef __get_dynamic_array_len
-#define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++]
+#define TP_ID1(_token, _system) _token##_system
+#define TP_ID(_token, _system) TP_ID1(_token, _system)
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = {
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+};
-#undef TP_ARGS
-#define TP_ARGS(args...) args
+#undef TP_ID1
+#undef TP_ID
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
+/*
+ * Stage 9 of the trace events.
+ *
+ * Create a toplevel descriptor for the whole probe.
+ */
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
+#define TP_ID1(_token, _system) _token##_system
+#define TP_ID(_token, _system) TP_ID1(_token, _system)
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static void __event_probe__##_name(void *__data, _proto) \
-{ \
- struct ltt_event *__event = __data; \
- struct ltt_channel *__chan = __event->chan; \
- struct lib_ring_buffer_ctx ctx; \
- size_t __event_len, __event_align; \
- size_t __dynamic_len_idx = 0; \
- size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \
- struct __event_typemap__##_name __typemap; \
- int __ret; \
- \
- if (0) \
- (void) __dynamic_len_idx; /* don't warn if unused */ \
- if (!ACCESS_ONCE(__chan->session->active)) \
- return; \
- __event_len = __event_get_size__##_name(__dynamic_len, _args); \
- __event_align = __event_get_align__##_name(_args); \
- lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len, \
- __event_align, -1); \
- __ret = __chan->ops->event_reserve(&ctx); \
- if (__ret < 0) \
- return; \
- /* Control code (field ordering) */ \
- _tstruct \
- __chan->ops->event_commit(&ctx); \
- return; \
- /* Copy code, steered by control code */ \
- _assign \
-}
+/* non-const because list head will be modified when registered. */
+static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
+ .provider = __stringify(TRACE_SYSTEM),
+ .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM),
+ .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)),
+ .head = { NULL, NULL },
+ .lazy_init_head = { NULL, NULL },
+ .lazy = 0,
+};
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef TP_ID1
+#undef TP_ID
/*
- * Stage 8 of the trace events.
+ * Stage 10 of the trace events.
*
* Register/unregister probes at module load/unload.
*/
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+#include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
#define TP_ID1(_token, _system) _token##_system
#define TP_ID(_token, _system) TP_ID1(_token, _system)
#define module_exit_eval1(_token, _system) module_exit(_token##_system)
#define module_exit_eval(_token, _system) module_exit_eval1(_token, _system)
+#ifndef TP_MODULE_NOINIT
static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
{
- int ret;
- int i;
-
wrapper_vmalloc_sync_all();
- ret = TP_ID(__lttng_types_init__, TRACE_SYSTEM)();
- if (ret)
- return ret;
- for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) {
- const struct lttng_event_desc *event_desc;
-
- event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
- ret = ltt_probe_register(event_desc->name,
- event_desc->probe_callback);
- if (ret)
- goto error;
- }
- return 0;
-
-error:
- for (i--; i >= 0; i--) {
- const struct lttng_event_desc *event_desc;
-
- event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
- ltt_probe_unregister(event_desc->name);
- }
- return ret;
+ return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM));
}
-module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
-
static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) {
- const struct lttng_event_desc *event_desc;
-
- event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
- ltt_probe_unregister(event_desc->name);
- }
- TP_ID(__lttng_types_exit__, TRACE_SYSTEM)();
+ lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM));
}
+#ifndef TP_MODULE_NOAUTOLOAD
+module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
+#endif
+
+#endif
#undef module_init_eval
#undef module_exit_eval
#undef TP_ID1
#undef TP_ID
+
+#undef TP_PROTO
+#undef TP_ARGS
projects / lttng-modules.git / blobdiff