-#include <lttng.h>
-#include <lttng-types.h>
#include <linux/debugfs.h>
+#include "lttng.h"
+#include "lttng-types.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"
-#if 0
-
-/* keep for a later stage (copy stage) */
-/*
- * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
- * strcpy().
- */
-#undef tp_assign
-#define tp_assign(dest, src) \
- lib_ring_buffer_align_ctx(config, &ctx, sizeof(src)); \
- lib_ring_buffer_write(config, &ctx, &src, sizeof(src));
-
-#undef tp_memcpy
-#define tp_memcpy(dest, src, len) \
- lib_ring_buffer_align_ctx(config, &ctx, sizeof(*(src))); \
- lib_ring_buffer_write(config, &ctx, &src, len);
-
-/* TODO */
-#undef tp_strcpy
-#define tp_strcpy(dest, src) __assign_str(dest, src);
-
-#endif //0
-
-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;
- unsigned int nr_fields;
-};
-
/*
* Macro declarations used for all stages.
*/
/*
* 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.
+ */
+
+#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
+
+#undef TP_PROTO
+#define TP_PROTO(args...) args
+
+#undef TP_ARGS
+#define TP_ARGS(args...) args
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(_template, _name, _proto, _args) \
+void trace_##_name(_proto);
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 2 of the trace events.
+ *
* Create event field type metadata section.
* Each event produce an array of fields.
*/
#undef __field
#define __field(_type, _item) \
- { .name = #_item, .type = { .atype = atype_integer, .name = #_type} },
+ { \
+ .name = #_item, \
+ .type = __type_integer(_type, __BYTE_ORDER, 10, none),\
+ },
#undef __field_ext
#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
-#undef __array
-#define __array(_type, _item, _length) \
+#undef __field_network
+#define __field_network(_type, _item) \
+ { \
+ .name = #_item, \
+ .type = __type_integer(_type, __BIG_ENDIAN, 10, none),\
+ },
+
+#undef __array_enc
+#define __array_enc(_type, _item, _length, _encoding) \
{ \
- .name = #_item, \
- .type = { \
+ .name = #_item, \
+ .type = \
+ { \
.atype = atype_array, \
- .name = NULL, \
- .u.array.elem_type = #_type, \
- .u.array.length = _length, \
+ .u.array = \
+ { \
+ .length = _length, \
+ .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \
+ }, \
}, \
},
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
+#undef __array
+#define __array(_type, _item, _length) \
+ __array_enc(_type, _item, _length, none)
+
+#undef __array_text
+#define __array_text(_type, _item, _length) \
+ __array_enc(_type, _item, _length, UTF8)
+
+#undef __dynamic_array_enc
+#define __dynamic_array_enc(_type, _item, _length, _encoding) \
{ \
- .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(u32, __BYTE_ORDER, 10, none), \
+ .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \
+ }, \
}, \
},
+#undef __dynamic_array
+#define __dynamic_array(_type, _item, _length) \
+ __dynamic_array_enc(_type, _item, _length, none)
+
+#undef __dynamic_array_text
+#define __dynamic_array_text(_type, _item, _length) \
+ __dynamic_array_enc(_type, _item, _length, UTF8)
+
#undef __string
#define __string(_item, _src) \
{ \
- .name = _item, \
- .type = { \
+ .name = #_item, \
+ .type = \
+ { \
.atype = atype_string, \
- .name = NULL, \
- .u.string.encoding = lttng_encode_UTF8, \
+ .u.basic.string.encoding = lttng_encode_UTF8, \
}, \
},
#define TP_STRUCT__entry(args...) args /* Only one used in this phase */
#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
- static const struct lttng_event_field __event_fields___##_name[] = { \
- _tstruct \
+#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+ static const struct lttng_event_field __event_fields___##_name[] = { \
+ _tstruct \
};
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef __type_integer
+
/*
- * Stage 2 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 */
+
+#undef TP_PROTO
+#define TP_PROTO(args...) args
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+static void __event_probe__##_name(void *__data, _proto);
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 4 of the trace events.
*
* Create an array of events.
*/
#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, proto, args, tstruct, assign, print) \
- { \
- .fields = __event_fields___##_name, \
- .name = #_name, \
- .nr_fields = ARRAY_SIZE(__event_fields___##_name), \
+#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), \
},
#define TP_ID1(_token, _system) _token##_system
#undef TP_ID1
#undef TP_ID
+
/*
- * Stage 3 of the trace events.
+ * Stage 5 of the trace events.
*
- * Create seq file metadata output.
+ * Create a toplevel descriptor for the whole probe.
*/
#define TP_ID1(_token, _system) _token##_system
#define TP_ID(_token, _system) TP_ID1(_token, _system)
-#define module_init_eval1(_token, _system) module_init(_token##_system)
-#define module_init_eval(_token, _system) module_init_eval1(_token, _system)
-#define module_exit_eval1(_token, _system) module_exit(_token##_system)
-#define module_exit_eval(_token, _system) module_exit_eval1(_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)
-{
-}
-
-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;
-}
-
-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),
+/* non-const because list head will be modified when registered. */
+static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
+ .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM),
+ .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)),
};
-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));
-}
-
-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;
-}
-
-module_init_eval(__lttng_types_init__, TRACE_SYSTEM);
-
-static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void)
-{
- debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM));
-}
-
-module_exit_eval(__lttng_types_exit__, TRACE_SYSTEM);
-
-#undef module_init_eval
-#undef module_exit_eval
#undef TP_ID1
#undef TP_ID
-
/*
- * Stage 4 of the trace events.
+ * Stage 6 of the trace events.
*
* Create static inline function that calculates event size.
*/
/* Named field types must be defined in lttng-types.h */
#undef __field
-#define __field(_type, _item) \
- len += lib_ring_buffer_align(len, sizeof(_type)); \
- len += sizeof(_type);
+#define __field(_type, _item) \
+ __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
+ __event_len += sizeof(_type);
#undef __field_ext
#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
#undef __array
-#define __array(_type, _item, _length) \
- len += lib_ring_buffer_align(len, sizeof(_type)); \
- len += sizeof(_type) * (_length);
+#define __array(_type, _item, _length) \
+ __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
+ __event_len += sizeof(_type) * (_length);
+
+#undef __array_text
+#define __array_text(_type, _item, _length) \
+ __array(_type, _item, _length)
#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) \
- len += lib_ring_buffer_align(len, sizeof(u32)); \
- len += sizeof(u32); \
- len += lib_ring_buffer_align(len, sizeof(_type)); \
- len += sizeof(_type) * (_length);
+#define __dynamic_array(_type, _item, _length) \
+ __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(u32)); \
+ __event_len += sizeof(u32); \
+ __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
+ __event_len += sizeof(_type) * (_length);
+
+#undef __dynamic_array_text
+#define __dynamic_array_text(_type, _item, _length) \
+ __dynamic_array(_type, _item, _length)
#undef __string
-#define __string(_item, _src) \
- len += dynamic_len[dynamic_len_idx++] = strlen(_src) + 1;
+#define __string(_item, _src) \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
+
+#undef TP_PROTO
+#define TP_PROTO(args...) args
#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args /* Only one used in this phase */
+#define TP_STRUCT__entry(args...) args
#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) \
-{ \
- size_t len = 0; \
- unsigned int dynamic_len_idx = 0; \
- \
- if (0) \
- (void) dynamic_len_idx; /* don't warn if unused */ \
- tstruct \
- return len; \
+#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
+{ \
+ size_t __event_len = 0; \
+ unsigned int __dynamic_len_idx = 0; \
+ \
+ if (0) \
+ (void) __dynamic_len_idx; /* don't warn if unused */ \
+ _tstruct \
+ return __event_len; \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#if 0
-
/*
- * Stage 4 of the trace events.
+ * Stage 7 of the trace events.
*
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
+ * Create static inline function that calculates event payload alignment.
*/
+#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-
-
-
-#include <linux/ftrace_event.h>
-
-/*
- * 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.
- *
- * TRACE_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));
-
+/* Named field types must be defined in lttng-types.h */
#undef __field
-#define __field(type, item) type item;
+#define __field(_type, _item) \
+ __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
#undef __field_ext
-#define __field_ext(type, item, filter_type) type item;
+#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
#undef __array
-#define __array(type, item, len) type item[len];
+#define __array(_type, _item, _length) \
+ __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
+
+#undef __array_text
+#define __array_text(_type, _item, _length) \
+ __array(_type, _item, _length)
#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 __data_loc_##item;
+#define __dynamic_array(_type, _item, _length) \
+ __event_align = max_t(size_t, __event_align, ltt_alignof(u32)); \
+ __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
+
+#undef __dynamic_array_text
+#define __dynamic_array_text(_type, _item, _length) \
+ __dynamic_array(_type, _item, _length)
#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
+#define __string(_item, _src)
+
+#undef TP_PROTO
+#define TP_PROTO(args...) args
#undef TP_STRUCT__entry
#define TP_STRUCT__entry(args...) args
#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
- struct ftrace_raw_##name { \
- struct trace_entry ent; \
- tstruct \
- char __data[0]; \
- }; \
- \
- static struct ftrace_event_class event_class_##name;
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args) \
- static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) event_##name
-
-#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 ftrace. */
-#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)) \
+#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+static inline size_t __event_get_align__##_name(_proto) \
+{ \
+ size_t __event_align = 1; \
+ _tstruct \
+ return __event_align; \
+}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Stage 2 of the trace events.
+ * Stage 8 of the trace events.
*
- * Create static inline function that calculates event size.
+ * Create structure declaration that allows the "assign" macros to access the
+ * field types.
*/
+#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)
+#define __field(_type, _item) _type _item;
#undef __field_ext
-#define __field_ext(type, item, filter_type)
+#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 item;
+#define __array(_type, _item, _length) _type _item;
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
+#undef __array_text
+#define __array_text(_type, _item, _length) \
+ __array(_type, _item, _length)
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- struct ftrace_data_offsets_##call { \
- tstruct; \
- };
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 3 of the trace events.
- *
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
- */
-
-#undef __entry
-#define __entry field
+#undef __dynamic_array
+#define __dynamic_array(_type, _item, _length) _type _item;
-#undef TP_printk
-#define TP_printk(fmt, args...) fmt "\n", args
+#undef __dynamic_array_text
+#define __dynamic_array_text(_type, _item, _length) \
+ __dynamic_array(_type, _item, _length)
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) \
- ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
+#undef __string
+#define __string(_item, _src) char _item;
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __print_flags
-#define __print_flags(flag, delim, flag_array...) \
- ({ \
- static const struct trace_print_flags __flags[] = \
- { flag_array, { -1, NULL }}; \
- ftrace_print_flags_seq(p, delim, flag, __flags); \
- })
-
-#undef __print_symbolic
-#define __print_symbolic(value, symbol_array...) \
- ({ \
- static const struct trace_print_flags symbols[] = \
- { symbol_array, { -1, NULL }}; \
- ftrace_print_symbols_seq(p, value, symbols); \
- })
-
-#undef __print_hex
-#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
- struct trace_event *trace_event) \
-{ \
- struct ftrace_event_call *event; \
- struct trace_seq *s = &iter->seq; \
- struct ftrace_raw_##call *field; \
- struct trace_entry *entry; \
- struct trace_seq *p = &iter->tmp_seq; \
- int ret; \
- \
- event = container_of(trace_event, struct ftrace_event_call, \
- event); \
- \
- entry = iter->ent; \
- \
- if (entry->type != event->event.type) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
- } \
- \
- field = (typeof(field))entry; \
- \
- trace_seq_init(p); \
- ret = trace_seq_printf(s, "%s: ", event->name); \
- if (ret) \
- ret = trace_seq_printf(s, print); \
- if (!ret) \
- return TRACE_TYPE_PARTIAL_LINE; \
- \
- return TRACE_TYPE_HANDLED; \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
-};
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
-static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
- struct trace_event *event) \
-{ \
- struct trace_seq *s = &iter->seq; \
- struct ftrace_raw_##template *field; \
- struct trace_entry *entry; \
- struct trace_seq *p = &iter->tmp_seq; \
- int ret; \
- \
- entry = iter->ent; \
- \
- if (entry->type != event_##call.event.type) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
- } \
- \
- field = (typeof(field))entry; \
- \
- trace_seq_init(p); \
- ret = trace_seq_printf(s, "%s: ", #call); \
- if (ret) \
- ret = trace_seq_printf(s, print); \
- if (!ret) \
- return TRACE_TYPE_PARTIAL_LINE; \
- \
- return TRACE_TYPE_HANDLED; \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
+#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
+struct __event_typemap__##_name { \
+ _tstruct \
};
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#undef __field_ext
-#define __field_ext(type, item, filter_type) \
- ret = trace_define_field(event_call, #type, #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- is_signed_type(type), filter_type); \
- if (ret) \
- return ret;
-
-#undef __field
-#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
-
-#undef __array
-#define __array(type, item, len) \
- BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
- ret = trace_define_field(event_call, #type "[" #len "]", #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- is_signed_type(type), FILTER_OTHER); \
- if (ret) \
- return ret;
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
- offsetof(typeof(field), __data_loc_##item), \
- sizeof(field.__data_loc_##item), \
- is_signed_type(type), FILTER_OTHER);
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
-static int notrace \
-ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
-{ \
- struct ftrace_raw_##call field; \
- int ret; \
- \
- tstruct; \
- \
- return ret; \
-}
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * remember the offset of each array from the beginning of the event.
+ * Stage 9 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.
*/
-#undef __entry
-#define __entry entry
+#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
#undef __field
-#define __field(type, item)
+#define __field(_type, _item) \
+ goto __assign_##_item; \
+__end_field_##_item:
#undef __field_ext
-#define __field_ext(type, item, filter_type)
+#define __field_ext(_type, _item, _filter_type) __field(_type, _item)
#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __data_offsets->item = __data_size + \
- offsetof(typeof(*entry), __data); \
- __data_offsets->item |= (len * sizeof(type)) << 16; \
- __data_size += (len) * sizeof(type);
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
+#define __array(_type, _item, _length) \
+ goto __assign_##_item; \
+__end_field_##_item:
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static inline notrace int ftrace_get_offsets_##call( \
- struct ftrace_data_offsets_##call *__data_offsets, proto) \
-{ \
- int __data_size = 0; \
- struct ftrace_raw_##call __maybe_unused *entry; \
- \
- tstruct; \
- \
- return __data_size; \
-}
+#undef __array_text
+#define __array_text(_type, _item, _length) \
+ __array(_type, _item, _length)
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
+#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 DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#undef __dynamic_array_text
+#define __dynamic_array_text(_type, _item, _length) \
+ __dynamic_array(_type, _item, _length)
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef __string
+#define __string(_item, _src) \
+ goto __assign_##_item; \
+__end_field_##_item:
/*
- * Stage 4 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * For those macros defined with TRACE_EVENT:
- *
- * static struct ftrace_event_call event_<call>;
- *
- * static void ftrace_raw_event_<call>(void *__data, proto)
- * {
- * struct ftrace_event_call *event_call = __data;
- * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
- * struct ring_buffer_event *event;
- * struct ftrace_raw_<call> *entry; <-- defined in stage 1
- * struct ring_buffer *buffer;
- * unsigned long irq_flags;
- * int __data_size;
- * int pc;
- *
- * local_save_flags(irq_flags);
- * pc = preempt_count();
- *
- * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
- *
- * event = trace_current_buffer_lock_reserve(&buffer,
- * event_<call>->event.type,
- * sizeof(*entry) + __data_size,
- * irq_flags, pc);
- * if (!event)
- * return;
- * entry = ring_buffer_event_data(event);
- *
- * { <assign>; } <-- Here we assign the entries by the __field and
- * __array macros.
- *
- * if (!filter_current_check_discard(buffer, event_call, entry, event))
- * trace_current_buffer_unlock_commit(buffer,
- * event, irq_flags, pc);
- * }
- *
- * static struct trace_event ftrace_event_type_<call> = {
- * .trace = ftrace_raw_output_<call>, <-- stage 2
- * };
- *
- * static const char print_fmt_<call>[] = <TP_printk>;
- *
- * static struct ftrace_event_class __used event_class_<template> = {
- * .system = "<system>",
- * .define_fields = ftrace_define_fields_<call>,
- * .fields = LIST_HEAD_INIT(event_class_##call.fields),
- * .raw_init = trace_event_raw_init,
- * .probe = ftrace_raw_event_##call,
- * .reg = ftrace_event_reg,
- * };
- *
- * static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
- * __attribute__((section("_ftrace_events"))) event_<call> = {
- * .name = "<call>",
- * .class = event_class_<template>,
- * .event = &ftrace_event_type_<call>,
- * .print_fmt = print_fmt_<call>,
- * };
- *
+ * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
+ * strcpy().
*/
+#undef tp_assign
+#define tp_assign(dest, src) \
+__assign_##dest: \
+ { \
+ __typeof__(__typemap.dest) __tmp = (src); \
+ lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \
+ __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \
+ } \
+ goto __end_field_##dest;
-#ifdef CONFIG_PERF_EVENTS
-
-#define _TRACE_PERF_PROTO(call, proto) \
- static notrace void \
- perf_trace_##call(void *__data, proto);
+#undef tp_memcpy
+#define tp_memcpy(dest, src, len) \
+__assign_##dest: \
+ if (0) \
+ (void) __typemap.dest; \
+ lib_ring_buffer_align_ctx(&ctx, ltt_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, ltt_alignof(u32)); \
+ __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \
+ } \
+ goto __end_field_##dest##_1; \
+__assign_##dest##_2: \
+ lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__typemap.dest)); \
+ __chan->ops->event_write(&ctx, src, len); \
+ goto __end_field_##dest##_2;
-#define _TRACE_PERF_INIT(call) \
- .perf_probe = perf_trace_##call,
+#undef tp_strcpy
+#define tp_strcpy(dest, src) \
+ tp_memcpy(dest, src, __get_dynamic_array_len(dest))
-#else
-#define _TRACE_PERF_PROTO(call, proto)
-#define _TRACE_PERF_INIT(call)
-#endif /* CONFIG_PERF_EVENTS */
+/* Named field types must be defined in lttng-types.h */
-#undef __entry
-#define __entry entry
+#undef __get_str
+#define __get_str(field) field
-#undef __field
-#define __field(type, item)
+#undef __get_dynamic_array
+#define __get_dynamic_array(field) field
-#undef __array
-#define __array(type, item, len)
+/* 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++]
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __entry->__data_loc_##item = __data_offsets.item;
+#undef TP_PROTO
+#define TP_PROTO(args...) args
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1) \
+#undef TP_ARGS
+#define TP_ARGS(args...) args
-#undef __assign_str
-#define __assign_str(dst, src) \
- strcpy(__get_str(dst), src);
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
#undef TP_fast_assign
#define TP_fast_assign(args...) args
-#undef TP_perf_assign
-#define TP_perf_assign(args...)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- \
-static notrace void \
-ftrace_raw_event_##call(void *__data, proto) \
-{ \
- struct ftrace_event_call *event_call = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ring_buffer_event *event; \
- struct ftrace_raw_##call *entry; \
- struct ring_buffer *buffer; \
- unsigned long irq_flags; \
- int __data_size; \
- int pc; \
- \
- local_save_flags(irq_flags); \
- pc = preempt_count(); \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- \
- event = trace_current_buffer_lock_reserve(&buffer, \
- event_call->event.type, \
- sizeof(*entry) + __data_size, \
- irq_flags, pc); \
- if (!event) \
- return; \
- entry = ring_buffer_event_data(event); \
- \
- tstruct \
- \
- { assign; } \
- \
- if (!filter_current_check_discard(buffer, event_call, entry, event)) \
- trace_nowake_buffer_unlock_commit(buffer, \
- event, irq_flags, pc); \
-}
-/*
- * The ftrace_test_probe is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the ftrace probe will
- * fail to compile unless it too is updated.
- */
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void ftrace_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(ftrace_raw_event_##template); \
-}
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#undef __entry
-#define __entry REC
-
-#undef __print_flags
-#undef __print_symbolic
-#undef __get_dynamic_array
-#undef __get_str
-
-#undef TP_printk
-#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
-
#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-_TRACE_PERF_PROTO(call, PARAMS(proto)); \
-static const char print_fmt_##call[] = print; \
-static struct ftrace_event_class __used event_class_##call = { \
- .system = __stringify(TRACE_SYSTEM), \
- .define_fields = ftrace_define_fields_##call, \
- .fields = LIST_HEAD_INIT(event_class_##call.fields),\
- .raw_init = trace_event_raw_init, \
- .probe = ftrace_raw_event_##call, \
- .reg = ftrace_event_reg, \
- _TRACE_PERF_INIT(call) \
-};
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
- \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .class = &event_class_##template, \
- .event.funcs = &ftrace_event_type_funcs_##template, \
- .print_fmt = print_fmt_##template, \
-};
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
- \
-static const char print_fmt_##call[] = print; \
- \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .class = &event_class_##template, \
- .event.funcs = &ftrace_event_type_funcs_##call, \
- .print_fmt = print_fmt_##call, \
+#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, __event->id); \
+ if (__ret < 0) \
+ return; \
+ /* Control code (field ordering) */ \
+ _tstruct \
+ __chan->ops->event_commit(&ctx); \
+ return; \
+ /* Copy code, steered by control code */ \
+ _assign \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
- * Define the insertion callback to perf events
- *
- * The job is very similar to ftrace_raw_event_<call> except that we don't
- * insert in the ring buffer but in a perf counter.
- *
- * static void ftrace_perf_<call>(proto)
- * {
- * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
- * struct ftrace_event_call *event_call = &event_<call>;
- * extern void perf_tp_event(int, u64, u64, void *, int);
- * struct ftrace_raw_##call *entry;
- * struct perf_trace_buf *trace_buf;
- * u64 __addr = 0, __count = 1;
- * unsigned long irq_flags;
- * struct trace_entry *ent;
- * int __entry_size;
- * int __data_size;
- * int __cpu
- * int pc;
- *
- * pc = preempt_count();
- *
- * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
+ * Stage 10 of the trace events.
*
- * // Below we want to get the aligned size by taking into account
- * // the u32 field that will later store the buffer size
- * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
- * sizeof(u64));
- * __entry_size -= sizeof(u32);
- *
- * // Protect the non nmi buffer
- * // This also protects the rcu read side
- * local_irq_save(irq_flags);
- * __cpu = smp_processor_id();
- *
- * if (in_nmi())
- * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
- * else
- * trace_buf = rcu_dereference_sched(perf_trace_buf);
- *
- * if (!trace_buf)
- * goto end;
- *
- * trace_buf = per_cpu_ptr(trace_buf, __cpu);
- *
- * // Avoid recursion from perf that could mess up the buffer
- * if (trace_buf->recursion++)
- * goto end_recursion;
- *
- * raw_data = trace_buf->buf;
- *
- * // Make recursion update visible before entering perf_tp_event
- * // so that we protect from perf recursions.
- *
- * barrier();
- *
- * //zero dead bytes from alignment to avoid stack leak to userspace:
- * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
- * entry = (struct ftrace_raw_<call> *)raw_data;
- * ent = &entry->ent;
- * tracing_generic_entry_update(ent, irq_flags, pc);
- * ent->type = event_call->id;
- *
- * <tstruct> <- do some jobs with dynamic arrays
- *
- * <assign> <- affect our values
- *
- * perf_tp_event(event_call->id, __addr, __count, entry,
- * __entry_size); <- submit them to perf counter
- *
- * }
+ * Register/unregister probes at module load/unload.
*/
-#ifdef CONFIG_PERF_EVENTS
-
-#undef __entry
-#define __entry entry
-
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) \
- ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
-
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __perf_addr
-#define __perf_addr(a) __addr = (a)
-
-#undef __perf_count
-#define __perf_count(c) __count = (c)
+#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace void \
-perf_trace_##call(void *__data, proto) \
-{ \
- struct ftrace_event_call *event_call = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ftrace_raw_##call *entry; \
- struct pt_regs __regs; \
- u64 __addr = 0, __count = 1; \
- struct hlist_head *head; \
- int __entry_size; \
- int __data_size; \
- int rctx; \
- \
- perf_fetch_caller_regs(&__regs); \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
- sizeof(u64)); \
- __entry_size -= sizeof(u32); \
- \
- if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
- "profile buffer not large enough")) \
- return; \
- \
- entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
- __entry_size, event_call->event.type, &__regs, &rctx); \
- if (!entry) \
- return; \
- \
- tstruct \
- \
- { assign; } \
- \
- head = this_cpu_ptr(event_call->perf_events); \
- perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, &__regs, head); \
-}
+#define TP_ID1(_token, _system) _token##_system
+#define TP_ID(_token, _system) TP_ID1(_token, _system)
+#define module_init_eval1(_token, _system) module_init(_token##_system)
+#define module_init_eval(_token, _system) module_init_eval1(_token, _system)
+#define module_exit_eval1(_token, _system) module_exit(_token##_system)
+#define module_exit_eval(_token, _system) module_exit_eval1(_token, _system)
-/*
- * This part is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the
- * perf probe will fail to compile unless it too is updated.
- */
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void perf_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(perf_trace_##template); \
+static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
+{
+ wrapper_vmalloc_sync_all();
+ return ltt_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM));
}
+module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
+{
+ ltt_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM));
+}
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#endif /* CONFIG_PERF_EVENTS */
+module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
-#undef _TRACE_PROFILE_INIT
-#endif //0
+#undef module_init_eval
+#undef module_exit_eval
+#undef TP_ID1
+#undef TP_ID
projects / lttng-modules.git / blobdiff