forked from luck/tmp_suning_uos_patched
beba4bb096
If a trace event uses a dynamic array for something other than a string then there's currently no way the TP_printk() can figure out what size it is. A __get_dynamic_array_len() is required to know the length. This also simplifies the __get_bitmask() macro which required it as well, but instead just hardcoded it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
788 lines
22 KiB
C
788 lines
22 KiB
C
/*
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* Stage 1 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* struct ftrace_raw_<call> {
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* struct trace_entry ent;
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* <type> <item>;
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* <type2> <item2>[<len>];
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* [...]
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* };
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*
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* The <type> <item> is created by the __field(type, item) macro or
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* the __array(type2, item2, len) macro.
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* We simply do "type item;", and that will create the fields
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* in the structure.
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*/
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#include <linux/ftrace_event.h>
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/*
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* DECLARE_EVENT_CLASS can be used to add a generic function
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* handlers for events. That is, if all events have the same
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* parameters and just have distinct trace points.
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* Each tracepoint can be defined with DEFINE_EVENT and that
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* will map the DECLARE_EVENT_CLASS to the tracepoint.
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*
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* TRACE_EVENT is a one to one mapping between tracepoint and template.
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*/
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
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DECLARE_EVENT_CLASS(name, \
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PARAMS(proto), \
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PARAMS(args), \
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PARAMS(tstruct), \
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PARAMS(assign), \
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PARAMS(print)); \
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DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
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#undef __field
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#define __field(type, item) type item;
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#undef __field_ext
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#define __field_ext(type, item, filter_type) type item;
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#undef __array
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#define __array(type, item, len) type item[len];
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#undef __dynamic_array
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#define __dynamic_array(type, item, len) u32 __data_loc_##item;
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#undef __string
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#define __string(item, src) __dynamic_array(char, item, -1)
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#undef __bitmask
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#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
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#undef TP_STRUCT__entry
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#define TP_STRUCT__entry(args...) args
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
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struct ftrace_raw_##name { \
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struct trace_entry ent; \
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tstruct \
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char __data[0]; \
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}; \
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\
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static struct ftrace_event_class event_class_##name;
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(template, name, proto, args) \
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static struct ftrace_event_call __used \
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__attribute__((__aligned__(4))) event_##name
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#undef DEFINE_EVENT_FN
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#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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/* Callbacks are meaningless to ftrace. */
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#undef TRACE_EVENT_FN
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#define TRACE_EVENT_FN(name, proto, args, tstruct, \
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assign, print, reg, unreg) \
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TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
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PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
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#undef TRACE_EVENT_FLAGS
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#define TRACE_EVENT_FLAGS(name, value) \
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__TRACE_EVENT_FLAGS(name, value)
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#undef TRACE_EVENT_PERF_PERM
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#define TRACE_EVENT_PERF_PERM(name, expr...) \
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__TRACE_EVENT_PERF_PERM(name, expr)
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Stage 2 of the trace events.
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*
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* Include the following:
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*
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* struct ftrace_data_offsets_<call> {
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* u32 <item1>;
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* u32 <item2>;
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* [...]
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* };
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*
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* The __dynamic_array() macro will create each u32 <item>, this is
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* to keep the offset of each array from the beginning of the event.
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* The size of an array is also encoded, in the higher 16 bits of <item>.
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*/
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#undef __field
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#define __field(type, item)
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#undef __field_ext
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#define __field_ext(type, item, filter_type)
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#undef __array
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#define __array(type, item, len)
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#undef __dynamic_array
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#define __dynamic_array(type, item, len) u32 item;
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#undef __string
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#define __string(item, src) __dynamic_array(char, item, -1)
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#undef __bitmask
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#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
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struct ftrace_data_offsets_##call { \
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tstruct; \
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};
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(template, name, proto, args)
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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#undef TRACE_EVENT_FLAGS
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#define TRACE_EVENT_FLAGS(event, flag)
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#undef TRACE_EVENT_PERF_PERM
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#define TRACE_EVENT_PERF_PERM(event, expr...)
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Stage 3 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* enum print_line_t
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* ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
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* {
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* struct trace_seq *s = &iter->seq;
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* struct ftrace_raw_<call> *field; <-- defined in stage 1
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* struct trace_entry *entry;
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* struct trace_seq *p = &iter->tmp_seq;
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* int ret;
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*
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* entry = iter->ent;
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*
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* if (entry->type != event_<call>->event.type) {
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* WARN_ON_ONCE(1);
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* return TRACE_TYPE_UNHANDLED;
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* }
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*
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* field = (typeof(field))entry;
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*
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* trace_seq_init(p);
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* ret = trace_seq_printf(s, "%s: ", <call>);
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* if (ret)
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* ret = trace_seq_printf(s, <TP_printk> "\n");
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* if (!ret)
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* return TRACE_TYPE_PARTIAL_LINE;
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*
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* return TRACE_TYPE_HANDLED;
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* }
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*
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* This is the method used to print the raw event to the trace
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* output format. Note, this is not needed if the data is read
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* in binary.
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*/
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#undef __entry
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#define __entry field
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#undef TP_printk
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#define TP_printk(fmt, args...) fmt "\n", args
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#undef __get_dynamic_array
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#define __get_dynamic_array(field) \
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((void *)__entry + (__entry->__data_loc_##field & 0xffff))
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#undef __get_dynamic_array_len
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#define __get_dynamic_array_len(field) \
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((__entry->__data_loc_##field >> 16) & 0xffff)
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#undef __get_str
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#define __get_str(field) (char *)__get_dynamic_array(field)
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#undef __get_bitmask
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#define __get_bitmask(field) \
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({ \
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void *__bitmask = __get_dynamic_array(field); \
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unsigned int __bitmask_size; \
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__bitmask_size = __get_dynamic_array_len(field); \
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ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
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})
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#undef __print_flags
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#define __print_flags(flag, delim, flag_array...) \
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({ \
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static const struct trace_print_flags __flags[] = \
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{ flag_array, { -1, NULL }}; \
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ftrace_print_flags_seq(p, delim, flag, __flags); \
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})
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#undef __print_symbolic
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#define __print_symbolic(value, symbol_array...) \
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({ \
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static const struct trace_print_flags symbols[] = \
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{ symbol_array, { -1, NULL }}; \
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ftrace_print_symbols_seq(p, value, symbols); \
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})
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#undef __print_symbolic_u64
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#if BITS_PER_LONG == 32
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#define __print_symbolic_u64(value, symbol_array...) \
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({ \
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static const struct trace_print_flags_u64 symbols[] = \
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{ symbol_array, { -1, NULL } }; \
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ftrace_print_symbols_seq_u64(p, value, symbols); \
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})
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#else
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#define __print_symbolic_u64(value, symbol_array...) \
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__print_symbolic(value, symbol_array)
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#endif
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#undef __print_hex
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#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
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static notrace enum print_line_t \
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ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
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struct trace_event *trace_event) \
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{ \
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struct trace_seq *s = &iter->seq; \
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struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
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struct ftrace_raw_##call *field; \
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int ret; \
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\
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field = (typeof(field))iter->ent; \
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\
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ret = ftrace_raw_output_prep(iter, trace_event); \
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if (ret) \
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return ret; \
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\
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ret = trace_seq_printf(s, print); \
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if (!ret) \
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return TRACE_TYPE_PARTIAL_LINE; \
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\
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return TRACE_TYPE_HANDLED; \
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} \
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static struct trace_event_functions ftrace_event_type_funcs_##call = { \
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.trace = ftrace_raw_output_##call, \
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};
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
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static notrace enum print_line_t \
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ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
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struct trace_event *event) \
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{ \
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struct ftrace_raw_##template *field; \
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struct trace_entry *entry; \
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struct trace_seq *p = &iter->tmp_seq; \
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\
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entry = iter->ent; \
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\
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if (entry->type != event_##call.event.type) { \
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WARN_ON_ONCE(1); \
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return TRACE_TYPE_UNHANDLED; \
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} \
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\
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field = (typeof(field))entry; \
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\
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trace_seq_init(p); \
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return ftrace_output_call(iter, #call, print); \
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} \
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static struct trace_event_functions ftrace_event_type_funcs_##call = { \
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.trace = ftrace_raw_output_##call, \
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};
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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#undef __field_ext
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#define __field_ext(type, item, filter_type) \
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ret = trace_define_field(event_call, #type, #item, \
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offsetof(typeof(field), item), \
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sizeof(field.item), \
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is_signed_type(type), filter_type); \
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if (ret) \
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return ret;
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#undef __field
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#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
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#undef __array
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#define __array(type, item, len) \
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do { \
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char *type_str = #type"["__stringify(len)"]"; \
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BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
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ret = trace_define_field(event_call, type_str, #item, \
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offsetof(typeof(field), item), \
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sizeof(field.item), \
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is_signed_type(type), FILTER_OTHER); \
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if (ret) \
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return ret; \
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} while (0);
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#undef __dynamic_array
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#define __dynamic_array(type, item, len) \
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ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
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offsetof(typeof(field), __data_loc_##item), \
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sizeof(field.__data_loc_##item), \
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is_signed_type(type), FILTER_OTHER);
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#undef __string
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#define __string(item, src) __dynamic_array(char, item, -1)
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#undef __bitmask
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#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
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static int notrace __init \
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ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
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{ \
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struct ftrace_raw_##call field; \
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int ret; \
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\
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tstruct; \
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\
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return ret; \
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}
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(template, name, proto, args)
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* remember the offset of each array from the beginning of the event.
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*/
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#undef __entry
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#define __entry entry
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#undef __field
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#define __field(type, item)
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#undef __field_ext
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#define __field_ext(type, item, filter_type)
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#undef __array
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#define __array(type, item, len)
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#undef __dynamic_array
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#define __dynamic_array(type, item, len) \
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__item_length = (len) * sizeof(type); \
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__data_offsets->item = __data_size + \
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offsetof(typeof(*entry), __data); \
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__data_offsets->item |= __item_length << 16; \
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__data_size += __item_length;
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#undef __string
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#define __string(item, src) __dynamic_array(char, item, \
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strlen((src) ? (const char *)(src) : "(null)") + 1)
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/*
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* __bitmask_size_in_bytes_raw is the number of bytes needed to hold
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* num_possible_cpus().
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*/
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#define __bitmask_size_in_bytes_raw(nr_bits) \
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(((nr_bits) + 7) / 8)
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#define __bitmask_size_in_longs(nr_bits) \
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((__bitmask_size_in_bytes_raw(nr_bits) + \
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((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
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/*
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* __bitmask_size_in_bytes is the number of bytes needed to hold
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* num_possible_cpus() padded out to the nearest long. This is what
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* is saved in the buffer, just to be consistent.
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*/
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#define __bitmask_size_in_bytes(nr_bits) \
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(__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
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#undef __bitmask
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#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
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__bitmask_size_in_longs(nr_bits))
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
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static inline notrace int ftrace_get_offsets_##call( \
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struct ftrace_data_offsets_##call *__data_offsets, proto) \
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{ \
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int __data_size = 0; \
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int __maybe_unused __item_length; \
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struct ftrace_raw_##call __maybe_unused *entry; \
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\
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tstruct; \
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\
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return __data_size; \
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}
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(template, name, proto, args)
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Stage 4 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* For those macros defined with TRACE_EVENT:
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*
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* static struct ftrace_event_call event_<call>;
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*
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* static void ftrace_raw_event_<call>(void *__data, proto)
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* {
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* struct ftrace_event_file *ftrace_file = __data;
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* struct ftrace_event_call *event_call = ftrace_file->event_call;
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* struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
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* unsigned long eflags = ftrace_file->flags;
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* enum event_trigger_type __tt = ETT_NONE;
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* struct ring_buffer_event *event;
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* struct ftrace_raw_<call> *entry; <-- defined in stage 1
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* struct ring_buffer *buffer;
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* unsigned long irq_flags;
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* int __data_size;
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* int pc;
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*
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* if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
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* if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
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* event_triggers_call(ftrace_file, NULL);
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* if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
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* return;
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* }
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*
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* local_save_flags(irq_flags);
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* pc = preempt_count();
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*
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* __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
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*
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* event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
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* event_<call>->event.type,
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* sizeof(*entry) + __data_size,
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* irq_flags, pc);
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* if (!event)
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* return;
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* entry = ring_buffer_event_data(event);
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*
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* { <assign>; } <-- Here we assign the entries by the __field and
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* __array macros.
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*
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|
* if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
|
|
* __tt = event_triggers_call(ftrace_file, entry);
|
|
*
|
|
* if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
|
|
* &ftrace_file->flags))
|
|
* ring_buffer_discard_commit(buffer, event);
|
|
* else if (!filter_check_discard(ftrace_file, entry, buffer, event))
|
|
* trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
|
|
*
|
|
* if (__tt)
|
|
* event_triggers_post_call(ftrace_file, __tt);
|
|
* }
|
|
*
|
|
* 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 event_<call> = {
|
|
* .class = event_class_<template>,
|
|
* {
|
|
* .tp = &__tracepoint_<call>,
|
|
* },
|
|
* .event = &ftrace_event_type_<call>,
|
|
* .print_fmt = print_fmt_<call>,
|
|
* .flags = TRACE_EVENT_FL_TRACEPOINT,
|
|
* };
|
|
* // its only safe to use pointers when doing linker tricks to
|
|
* // create an array.
|
|
* static struct ftrace_event_call __used
|
|
* __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
|
|
*
|
|
*/
|
|
|
|
#ifdef CONFIG_PERF_EVENTS
|
|
|
|
#define _TRACE_PERF_PROTO(call, proto) \
|
|
static notrace void \
|
|
perf_trace_##call(void *__data, proto);
|
|
|
|
#define _TRACE_PERF_INIT(call) \
|
|
.perf_probe = perf_trace_##call,
|
|
|
|
#else
|
|
#define _TRACE_PERF_PROTO(call, proto)
|
|
#define _TRACE_PERF_INIT(call)
|
|
#endif /* CONFIG_PERF_EVENTS */
|
|
|
|
#undef __entry
|
|
#define __entry entry
|
|
|
|
#undef __field
|
|
#define __field(type, item)
|
|
|
|
#undef __array
|
|
#define __array(type, item, len)
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item, len) \
|
|
__entry->__data_loc_##item = __data_offsets.item;
|
|
|
|
#undef __string
|
|
#define __string(item, src) __dynamic_array(char, item, -1)
|
|
|
|
#undef __assign_str
|
|
#define __assign_str(dst, src) \
|
|
strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
|
|
|
|
#undef __bitmask
|
|
#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
|
|
|
|
#undef __get_bitmask
|
|
#define __get_bitmask(field) (char *)__get_dynamic_array(field)
|
|
|
|
#undef __assign_bitmask
|
|
#define __assign_bitmask(dst, src, nr_bits) \
|
|
memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
|
|
|
|
#undef TP_fast_assign
|
|
#define TP_fast_assign(args...) args
|
|
|
|
#undef __perf_addr
|
|
#define __perf_addr(a) (a)
|
|
|
|
#undef __perf_count
|
|
#define __perf_count(c) (c)
|
|
|
|
#undef __perf_task
|
|
#define __perf_task(t) (t)
|
|
|
|
#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_file *ftrace_file = __data; \
|
|
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
|
|
struct ftrace_event_buffer fbuffer; \
|
|
struct ftrace_raw_##call *entry; \
|
|
int __data_size; \
|
|
\
|
|
if (ftrace_trigger_soft_disabled(ftrace_file)) \
|
|
return; \
|
|
\
|
|
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
|
|
\
|
|
entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
|
|
sizeof(*entry) + __data_size); \
|
|
\
|
|
if (!entry) \
|
|
return; \
|
|
\
|
|
tstruct \
|
|
\
|
|
{ assign; } \
|
|
\
|
|
ftrace_event_buffer_commit(&fbuffer); \
|
|
}
|
|
/*
|
|
* 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 __print_hex
|
|
#undef __get_dynamic_array
|
|
#undef __get_dynamic_array_len
|
|
#undef __get_str
|
|
#undef __get_bitmask
|
|
|
|
#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 __refdata 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 event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &ftrace_event_type_funcs_##template, \
|
|
.print_fmt = print_fmt_##template, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct ftrace_event_call __used \
|
|
__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
|
|
|
|
#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 event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &ftrace_event_type_funcs_##call, \
|
|
.print_fmt = print_fmt_##call, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct ftrace_event_call __used \
|
|
__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
|
|
|
|
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
|
|
|
|
|
|
#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_dynamic_array_len
|
|
#define __get_dynamic_array_len(field) \
|
|
((__entry->__data_loc_##field >> 16) & 0xffff)
|
|
|
|
#undef __get_str
|
|
#define __get_str(field) (char *)__get_dynamic_array(field)
|
|
|
|
#undef __get_bitmask
|
|
#define __get_bitmask(field) (char *)__get_dynamic_array(field)
|
|
|
|
#undef __perf_addr
|
|
#define __perf_addr(a) (__addr = (a))
|
|
|
|
#undef __perf_count
|
|
#define __perf_count(c) (__count = (c))
|
|
|
|
#undef __perf_task
|
|
#define __perf_task(t) (__task = (t))
|
|
|
|
#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 task_struct *__task = NULL; \
|
|
struct hlist_head *head; \
|
|
int __entry_size; \
|
|
int __data_size; \
|
|
int rctx; \
|
|
\
|
|
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
|
|
\
|
|
head = this_cpu_ptr(event_call->perf_events); \
|
|
if (__builtin_constant_p(!__task) && !__task && \
|
|
hlist_empty(head)) \
|
|
return; \
|
|
\
|
|
__entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
|
|
sizeof(u64)); \
|
|
__entry_size -= sizeof(u32); \
|
|
\
|
|
perf_fetch_caller_regs(&__regs); \
|
|
entry = perf_trace_buf_prepare(__entry_size, \
|
|
event_call->event.type, &__regs, &rctx); \
|
|
if (!entry) \
|
|
return; \
|
|
\
|
|
tstruct \
|
|
\
|
|
{ assign; } \
|
|
\
|
|
perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
|
|
__count, &__regs, head, __task); \
|
|
}
|
|
|
|
/*
|
|
* 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); \
|
|
}
|
|
|
|
|
|
#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)
|
|
#endif /* CONFIG_PERF_EVENTS */
|
|
|