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Diffstat (limited to 'kernel/trace/trace_export.c')
-rw-r--r--kernel/trace/trace_export.c185
1 files changed, 76 insertions, 109 deletions
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index d4fa5dc1ee4..d4ddde28a81 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -18,6 +18,16 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM ftrace
+/*
+ * The FTRACE_ENTRY_REG macro allows ftrace entry to define register
+ * function and thus become accesible via perf.
+ */
+#undef FTRACE_ENTRY_REG
+#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
+ filter, regfn) \
+ FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
+ filter)
+
/* not needed for this file */
#undef __field_struct
#define __field_struct(type, item)
@@ -44,94 +54,23 @@
#define F_printk(fmt, args...) fmt, args
#undef FTRACE_ENTRY
-#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
-struct ____ftrace_##name { \
- tstruct \
-}; \
-static void __always_unused ____ftrace_check_##name(void) \
-{ \
- struct ____ftrace_##name *__entry = NULL; \
- \
- /* force compile-time check on F_printk() */ \
- printk(print); \
-}
-
-#undef FTRACE_ENTRY_DUP
-#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
- FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
-
-#include "trace_entries.h"
-
-
-#undef __field
-#define __field(type, item) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
- "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
- offsetof(typeof(field), item), \
- sizeof(field.item), is_signed_type(type)); \
- if (!ret) \
- return 0;
-
-#undef __field_desc
-#define __field_desc(type, container, item) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
- "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
- offsetof(typeof(field), container.item), \
- sizeof(field.container.item), \
- is_signed_type(type)); \
- if (!ret) \
- return 0;
-
-#undef __array
-#define __array(type, item, len) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
- "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
- offsetof(typeof(field), item), \
- sizeof(field.item), is_signed_type(type)); \
- if (!ret) \
- return 0;
-
-#undef __array_desc
-#define __array_desc(type, container, item, len) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
- "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
- offsetof(typeof(field), container.item), \
- sizeof(field.container.item), \
- is_signed_type(type)); \
- if (!ret) \
- return 0;
-
-#undef __dynamic_array
-#define __dynamic_array(type, item) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
- "offset:%zu;\tsize:0;\tsigned:%u;\n", \
- offsetof(typeof(field), item), \
- is_signed_type(type)); \
- if (!ret) \
- return 0;
-
-#undef F_printk
-#define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
-
-#undef __entry
-#define __entry REC
-
-#undef FTRACE_ENTRY
-#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
-static int \
-ftrace_format_##name(struct ftrace_event_call *unused, \
- struct trace_seq *s) \
+#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
+struct ____ftrace_##name { \
+ tstruct \
+}; \
+static void __always_unused ____ftrace_check_##name(void) \
{ \
- struct struct_name field __attribute__((unused)); \
- int ret = 0; \
+ struct ____ftrace_##name *__entry = NULL; \
\
- tstruct; \
- \
- trace_seq_printf(s, "\nprint fmt: " print); \
- \
- return ret; \
+ /* force compile-time check on F_printk() */ \
+ printk(print); \
}
+#undef FTRACE_ENTRY_DUP
+#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \
+ FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
+ filter)
+
#include "trace_entries.h"
#undef __field
@@ -139,7 +78,7 @@ ftrace_format_##name(struct ftrace_event_call *unused, \
ret = trace_define_field(event_call, #type, #item, \
offsetof(typeof(field), item), \
sizeof(field.item), \
- is_signed_type(type), FILTER_OTHER); \
+ is_signed_type(type), filter_type); \
if (ret) \
return ret;
@@ -149,19 +88,22 @@ ftrace_format_##name(struct ftrace_event_call *unused, \
offsetof(typeof(field), \
container.item), \
sizeof(field.container.item), \
- is_signed_type(type), FILTER_OTHER); \
+ is_signed_type(type), filter_type); \
if (ret) \
return ret;
#undef __array
#define __array(type, item, len) \
- BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
- ret = trace_define_field(event_call, #type "[" #len "]", #item, \
+ do { \
+ char *type_str = #type"["__stringify(len)"]"; \
+ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
+ ret = trace_define_field(event_call, type_str, #item, \
offsetof(typeof(field), item), \
sizeof(field.item), \
- is_signed_type(type), FILTER_OTHER); \
- if (ret) \
- return ret;
+ is_signed_type(type), filter_type); \
+ if (ret) \
+ return ret; \
+ } while (0);
#undef __array_desc
#define __array_desc(type, container, item, len) \
@@ -170,20 +112,26 @@ ftrace_format_##name(struct ftrace_event_call *unused, \
offsetof(typeof(field), \
container.item), \
sizeof(field.container.item), \
- is_signed_type(type), FILTER_OTHER); \
+ is_signed_type(type), filter_type); \
if (ret) \
return ret;
#undef __dynamic_array
-#define __dynamic_array(type, item)
+#define __dynamic_array(type, item) \
+ ret = trace_define_field(event_call, #type, #item, \
+ offsetof(typeof(field), item), \
+ 0, is_signed_type(type), filter_type);\
+ if (ret) \
+ return ret;
#undef FTRACE_ENTRY
-#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
-int \
+#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
+static int __init \
ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
{ \
struct struct_name field; \
int ret; \
+ int filter_type = filter; \
\
tstruct; \
\
@@ -192,11 +140,8 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
#include "trace_entries.h"
-static int ftrace_raw_init_event(struct ftrace_event_call *call)
-{
- INIT_LIST_HEAD(&call->fields);
- return 0;
-}
+#undef __entry
+#define __entry REC
#undef __field
#define __field(type, item)
@@ -213,18 +158,40 @@ static int ftrace_raw_init_event(struct ftrace_event_call *call)
#undef __dynamic_array
#define __dynamic_array(type, item)
-#undef FTRACE_ENTRY
-#define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \
+#undef F_printk
+#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
+
+#undef FTRACE_ENTRY_REG
+#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\
+ regfn) \
\
-struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .id = type, \
+struct ftrace_event_class __refdata event_class_ftrace_##call = { \
.system = __stringify(TRACE_SYSTEM), \
- .raw_init = ftrace_raw_init_event, \
- .show_format = ftrace_format_##call, \
.define_fields = ftrace_define_fields_##call, \
+ .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
+ .reg = regfn, \
}; \
+ \
+struct ftrace_event_call __used event_##call = { \
+ .class = &event_class_ftrace_##call, \
+ { \
+ .name = #call, \
+ }, \
+ .event.type = etype, \
+ .print_fmt = print, \
+ .flags = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \
+}; \
+struct ftrace_event_call __used \
+__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
+
+#undef FTRACE_ENTRY
+#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \
+ FTRACE_ENTRY_REG(call, struct_name, etype, \
+ PARAMS(tstruct), PARAMS(print), filter, NULL)
+
+int ftrace_event_is_function(struct ftrace_event_call *call)
+{
+ return call == &event_function;
+}
#include "trace_entries.h"
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 20:00:19 +0000