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Vincent Donnefort
5f3efd1dce
Declaring remote events can be cumbersome let's add a set of macros to
simplify developers life. The declaration of a remote event is very
similar to kernel's events:
REMOTE_EVENT(name, id,
RE_STRUCT(
re_field(u64 foo)
),
RE_PRINTK("foo=%llu", __entry->foo)
)
Link: https://patch.msgid.link/20260309162516.2623589-12-vdonnefort@google.com
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/trace_events.h>
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#include <linux/trace_remote_event.h>
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#include <linux/trace_seq.h>
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#include <linux/stringify.h>
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#define REMOTE_EVENT_INCLUDE(__file) __stringify(../../__file)
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#ifdef REMOTE_EVENT_SECTION
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# define __REMOTE_EVENT_SECTION(__name) __used __section(REMOTE_EVENT_SECTION"."#__name)
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#else
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# define __REMOTE_EVENT_SECTION(__name)
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#endif
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#define REMOTE_PRINTK_COUNT_ARGS(__args...) \
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__COUNT_ARGS(, ##__args, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 0)
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#define __remote_printk0() \
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trace_seq_putc(seq, '\n')
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#define __remote_printk1(__fmt) \
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trace_seq_puts(seq, " " __fmt "\n") \
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#define __remote_printk2(__fmt, __args...) \
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do { \
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trace_seq_putc(seq, ' '); \
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trace_seq_printf(seq, __fmt, __args); \
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trace_seq_putc(seq, '\n'); \
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} while (0)
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/* Apply the appropriate trace_seq sequence according to the number of arguments */
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#define remote_printk(__args...) \
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CONCATENATE(__remote_printk, REMOTE_PRINTK_COUNT_ARGS(__args))(__args)
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#define RE_PRINTK(__args...) __args
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#define REMOTE_EVENT(__name, __id, __struct, __printk) \
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REMOTE_EVENT_FORMAT(__name, __struct); \
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static void remote_event_print_##__name(void *evt, struct trace_seq *seq) \
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{ \
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struct remote_event_format_##__name __maybe_unused *__entry = evt; \
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trace_seq_puts(seq, #__name); \
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remote_printk(__printk); \
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}
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#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE)
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#undef REMOTE_EVENT
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#undef RE_PRINTK
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#undef re_field
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#define re_field(__type, __field) \
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{ \
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.type = #__type, .name = #__field, \
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.size = sizeof(__type), .align = __alignof__(__type), \
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.is_signed = is_signed_type(__type), \
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},
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#define __entry REC
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#define RE_PRINTK(__fmt, __args...) "\"" __fmt "\", " __stringify(__args)
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#define REMOTE_EVENT(__name, __id, __struct, __printk) \
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static struct trace_event_fields remote_event_fields_##__name[] = { \
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__struct \
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{} \
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}; \
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static char remote_event_print_fmt_##__name[] = __printk; \
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static struct remote_event __REMOTE_EVENT_SECTION(__name) \
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remote_event_##__name = { \
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.name = #__name, \
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.id = __id, \
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.fields = remote_event_fields_##__name, \
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.print_fmt = remote_event_print_fmt_##__name, \
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.print = remote_event_print_##__name, \
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}
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#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE)
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