forked from Minki/linux
e310396bb8
- Added new "bootconfig".
Looks for a file appended to initrd to add boot config options.
This has been discussed thoroughly at Linux Plumbers.
Very useful for adding kprobes at bootup.
Only enabled if "bootconfig" is on the real kernel command line.
- Created dynamic event creation.
Merges common code between creating synthetic events and
kprobe events.
- Rename perf "ring_buffer" structure to "perf_buffer"
- Rename ftrace "ring_buffer" structure to "trace_buffer"
Had to rename existing "trace_buffer" to "array_buffer"
- Allow trace_printk() to work withing (some) tracing code.
- Sort of tracing configs to be a little better organized
- Fixed bug where ftrace_graph hash was not being protected properly
- Various other small fixes and clean ups
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Merge tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
- Added new "bootconfig".
This looks for a file appended to initrd to add boot config options,
and has been discussed thoroughly at Linux Plumbers.
Very useful for adding kprobes at bootup.
Only enabled if "bootconfig" is on the real kernel command line.
- Created dynamic event creation.
Merges common code between creating synthetic events and kprobe
events.
- Rename perf "ring_buffer" structure to "perf_buffer"
- Rename ftrace "ring_buffer" structure to "trace_buffer"
Had to rename existing "trace_buffer" to "array_buffer"
- Allow trace_printk() to work withing (some) tracing code.
- Sort of tracing configs to be a little better organized
- Fixed bug where ftrace_graph hash was not being protected properly
- Various other small fixes and clean ups
* tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (88 commits)
bootconfig: Show the number of nodes on boot message
tools/bootconfig: Show the number of bootconfig nodes
bootconfig: Add more parse error messages
bootconfig: Use bootconfig instead of boot config
ftrace: Protect ftrace_graph_hash with ftrace_sync
ftrace: Add comment to why rcu_dereference_sched() is open coded
tracing: Annotate ftrace_graph_notrace_hash pointer with __rcu
tracing: Annotate ftrace_graph_hash pointer with __rcu
bootconfig: Only load bootconfig if "bootconfig" is on the kernel cmdline
tracing: Use seq_buf for building dynevent_cmd string
tracing: Remove useless code in dynevent_arg_pair_add()
tracing: Remove check_arg() callbacks from dynevent args
tracing: Consolidate some synth_event_trace code
tracing: Fix now invalid var_ref_vals assumption in trace action
tracing: Change trace_boot to use synth_event interface
tracing: Move tracing selftests to bottom of menu
tracing: Move mmio tracer config up with the other tracers
tracing: Move tracing test module configs together
tracing: Move all function tracing configs together
tracing: Documentation for in-kernel synthetic event API
...
793 lines
22 KiB
C
793 lines
22 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Stage 1 of the trace events.
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*
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* Override the macros in the event tracepoint header <trace/events/XXX.h>
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* to include the following:
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*
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* struct trace_event_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/trace_events.h>
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#ifndef TRACE_SYSTEM_VAR
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#define TRACE_SYSTEM_VAR TRACE_SYSTEM
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#endif
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#define __app__(x, y) str__##x##y
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#define __app(x, y) __app__(x, y)
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#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
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#define TRACE_MAKE_SYSTEM_STR() \
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static const char TRACE_SYSTEM_STRING[] = \
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__stringify(TRACE_SYSTEM)
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TRACE_MAKE_SYSTEM_STR();
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#undef TRACE_DEFINE_ENUM
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#define TRACE_DEFINE_ENUM(a) \
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static struct trace_eval_map __used __initdata \
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__##TRACE_SYSTEM##_##a = \
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{ \
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.system = TRACE_SYSTEM_STRING, \
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.eval_string = #a, \
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.eval_value = a \
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}; \
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static struct trace_eval_map __used \
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__attribute__((section("_ftrace_eval_map"))) \
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*TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
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#undef TRACE_DEFINE_SIZEOF
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#define TRACE_DEFINE_SIZEOF(a) \
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static struct trace_eval_map __used __initdata \
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__##TRACE_SYSTEM##_##a = \
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{ \
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.system = TRACE_SYSTEM_STRING, \
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.eval_string = "sizeof(" #a ")", \
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.eval_value = sizeof(a) \
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}; \
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static struct trace_eval_map __used \
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__attribute__((section("_ftrace_eval_map"))) \
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*TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
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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 __field_struct
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#define __field_struct(type, item) type item;
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#undef __field_struct_ext
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#define __field_struct_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 trace_event_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 trace_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 trace_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_FN_COND
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#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
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assign, print, reg, unreg) \
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TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
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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 trace_event_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 TRACE_DEFINE_ENUM
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#define TRACE_DEFINE_ENUM(a)
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#undef TRACE_DEFINE_SIZEOF
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#define TRACE_DEFINE_SIZEOF(a)
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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 __field_struct
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#define __field_struct(type, item)
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#undef __field_struct_ext
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#define __field_struct_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 trace_event_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 the event tracepoint header <trace/events/XXX.h>
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* to include the following:
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*
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* enum print_line_t
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* trace_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 trace_event_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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trace_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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trace_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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trace_print_symbols_seq(p, value, symbols); \
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})
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#undef __print_flags_u64
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#undef __print_symbolic_u64
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#if BITS_PER_LONG == 32
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#define __print_flags_u64(flag, delim, flag_array...) \
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({ \
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static const struct trace_print_flags_u64 __flags[] = \
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{ flag_array, { -1, NULL } }; \
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trace_print_flags_seq_u64(p, delim, flag, __flags); \
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})
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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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trace_print_symbols_seq_u64(p, value, symbols); \
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})
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#else
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#define __print_flags_u64(flag, delim, flag_array...) \
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__print_flags(flag, delim, flag_array)
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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) \
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trace_print_hex_seq(p, buf, buf_len, false)
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#undef __print_hex_str
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#define __print_hex_str(buf, buf_len) \
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trace_print_hex_seq(p, buf, buf_len, true)
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#undef __print_array
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#define __print_array(array, count, el_size) \
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({ \
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BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
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el_size != 4 && el_size != 8); \
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trace_print_array_seq(p, array, count, el_size); \
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})
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#undef __print_hex_dump
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#define __print_hex_dump(prefix_str, prefix_type, \
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rowsize, groupsize, buf, len, ascii) \
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trace_print_hex_dump_seq(p, prefix_str, prefix_type, \
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rowsize, groupsize, buf, len, ascii)
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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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trace_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 trace_event_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 = trace_raw_output_prep(iter, trace_event); \
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if (ret != TRACE_TYPE_HANDLED) \
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return ret; \
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\
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trace_seq_printf(s, print); \
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\
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return trace_handle_return(s); \
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} \
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static struct trace_event_functions trace_event_type_funcs_##call = { \
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.trace = trace_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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trace_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 trace_event_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 trace_output_call(iter, #call, print); \
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} \
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static struct trace_event_functions trace_event_type_funcs_##call = { \
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.trace = trace_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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.type = #_type, .name = #_item, \
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.size = sizeof(_type), .align = __alignof__(_type), \
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.is_signed = is_signed_type(_type), .filter_type = _filter_type },
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#undef __field_struct_ext
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#define __field_struct_ext(_type, _item, _filter_type) { \
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.type = #_type, .name = #_item, \
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.size = sizeof(_type), .align = __alignof__(_type), \
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0, .filter_type = _filter_type },
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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 __field_struct
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#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
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#undef __array
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#define __array(_type, _item, _len) { \
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.type = #_type"["__stringify(_len)"]", .name = #_item, \
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.size = sizeof(_type[_len]), .align = __alignof__(_type), \
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.is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
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#undef __dynamic_array
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#define __dynamic_array(_type, _item, _len) { \
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.type = "__data_loc " #_type "[]", .name = #_item, \
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.size = 4, .align = 4, \
|
|
.is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
|
|
|
|
#undef __string
|
|
#define __string(item, src) __dynamic_array(char, item, -1)
|
|
|
|
#undef __bitmask
|
|
#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
|
|
|
|
#undef DECLARE_EVENT_CLASS
|
|
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
|
|
static struct trace_event_fields trace_event_fields_##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)
|
|
|
|
/*
|
|
* remember the offset of each array from the beginning of the event.
|
|
*/
|
|
|
|
#undef __entry
|
|
#define __entry entry
|
|
|
|
#undef __field
|
|
#define __field(type, item)
|
|
|
|
#undef __field_ext
|
|
#define __field_ext(type, item, filter_type)
|
|
|
|
#undef __field_struct
|
|
#define __field_struct(type, item)
|
|
|
|
#undef __field_struct_ext
|
|
#define __field_struct_ext(type, item, filter_type)
|
|
|
|
#undef __array
|
|
#define __array(type, item, len)
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item, len) \
|
|
__item_length = (len) * sizeof(type); \
|
|
__data_offsets->item = __data_size + \
|
|
offsetof(typeof(*entry), __data); \
|
|
__data_offsets->item |= __item_length << 16; \
|
|
__data_size += __item_length;
|
|
|
|
#undef __string
|
|
#define __string(item, src) __dynamic_array(char, item, \
|
|
strlen((src) ? (const char *)(src) : "(null)") + 1)
|
|
|
|
/*
|
|
* __bitmask_size_in_bytes_raw is the number of bytes needed to hold
|
|
* num_possible_cpus().
|
|
*/
|
|
#define __bitmask_size_in_bytes_raw(nr_bits) \
|
|
(((nr_bits) + 7) / 8)
|
|
|
|
#define __bitmask_size_in_longs(nr_bits) \
|
|
((__bitmask_size_in_bytes_raw(nr_bits) + \
|
|
((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
|
|
|
|
/*
|
|
* __bitmask_size_in_bytes is the number of bytes needed to hold
|
|
* num_possible_cpus() padded out to the nearest long. This is what
|
|
* is saved in the buffer, just to be consistent.
|
|
*/
|
|
#define __bitmask_size_in_bytes(nr_bits) \
|
|
(__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
|
|
|
|
#undef __bitmask
|
|
#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
|
|
__bitmask_size_in_longs(nr_bits))
|
|
|
|
#undef DECLARE_EVENT_CLASS
|
|
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
|
|
static inline notrace int trace_event_get_offsets_##call( \
|
|
struct trace_event_data_offsets_##call *__data_offsets, proto) \
|
|
{ \
|
|
int __data_size = 0; \
|
|
int __maybe_unused __item_length; \
|
|
struct trace_event_raw_##call __maybe_unused *entry; \
|
|
\
|
|
tstruct; \
|
|
\
|
|
return __data_size; \
|
|
}
|
|
|
|
#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 4 of the trace events.
|
|
*
|
|
* Override the macros in the event tracepoint header <trace/events/XXX.h>
|
|
* to include the following:
|
|
*
|
|
* For those macros defined with TRACE_EVENT:
|
|
*
|
|
* static struct trace_event_call event_<call>;
|
|
*
|
|
* static void trace_event_raw_event_<call>(void *__data, proto)
|
|
* {
|
|
* struct trace_event_file *trace_file = __data;
|
|
* struct trace_event_call *event_call = trace_file->event_call;
|
|
* struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
|
|
* unsigned long eflags = trace_file->flags;
|
|
* enum event_trigger_type __tt = ETT_NONE;
|
|
* struct ring_buffer_event *event;
|
|
* struct trace_event_raw_<call> *entry; <-- defined in stage 1
|
|
* struct trace_buffer *buffer;
|
|
* unsigned long irq_flags;
|
|
* int __data_size;
|
|
* int pc;
|
|
*
|
|
* if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
|
|
* if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
|
|
* event_triggers_call(trace_file, NULL);
|
|
* if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
|
|
* return;
|
|
* }
|
|
*
|
|
* local_save_flags(irq_flags);
|
|
* pc = preempt_count();
|
|
*
|
|
* __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
|
|
*
|
|
* event = trace_event_buffer_lock_reserve(&buffer, trace_file,
|
|
* 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 (eflags & EVENT_FILE_FL_TRIGGER_COND)
|
|
* __tt = event_triggers_call(trace_file, entry);
|
|
*
|
|
* if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
|
|
* &trace_file->flags))
|
|
* ring_buffer_discard_commit(buffer, event);
|
|
* else if (!filter_check_discard(trace_file, entry, buffer, event))
|
|
* trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
|
|
*
|
|
* if (__tt)
|
|
* event_triggers_post_call(trace_file, __tt);
|
|
* }
|
|
*
|
|
* static struct trace_event ftrace_event_type_<call> = {
|
|
* .trace = trace_raw_output_<call>, <-- stage 2
|
|
* };
|
|
*
|
|
* static char print_fmt_<call>[] = <TP_printk>;
|
|
*
|
|
* static struct trace_event_class __used event_class_<template> = {
|
|
* .system = "<system>",
|
|
* .fields_array = trace_event_fields_<call>,
|
|
* .fields = LIST_HEAD_INIT(event_class_##call.fields),
|
|
* .raw_init = trace_event_raw_init,
|
|
* .probe = trace_event_raw_event_##call,
|
|
* .reg = trace_event_reg,
|
|
* };
|
|
*
|
|
* static struct trace_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 trace_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 __field_struct
|
|
#define __field_struct(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_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 \
|
|
trace_event_raw_event_##call(void *__data, proto) \
|
|
{ \
|
|
struct trace_event_file *trace_file = __data; \
|
|
struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
|
|
struct trace_event_buffer fbuffer; \
|
|
struct trace_event_raw_##call *entry; \
|
|
int __data_size; \
|
|
\
|
|
if (trace_trigger_soft_disabled(trace_file)) \
|
|
return; \
|
|
\
|
|
__data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
|
|
\
|
|
entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
|
|
sizeof(*entry) + __data_size); \
|
|
\
|
|
if (!entry) \
|
|
return; \
|
|
\
|
|
tstruct \
|
|
\
|
|
{ assign; } \
|
|
\
|
|
trace_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(trace_event_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 __print_hex_str
|
|
#undef __get_dynamic_array
|
|
#undef __get_dynamic_array_len
|
|
#undef __get_str
|
|
#undef __get_bitmask
|
|
#undef __print_array
|
|
#undef __print_hex_dump
|
|
|
|
#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 char print_fmt_##call[] = print; \
|
|
static struct trace_event_class __used __refdata event_class_##call = { \
|
|
.system = TRACE_SYSTEM_STRING, \
|
|
.fields_array = trace_event_fields_##call, \
|
|
.fields = LIST_HEAD_INIT(event_class_##call.fields),\
|
|
.raw_init = trace_event_raw_init, \
|
|
.probe = trace_event_raw_event_##call, \
|
|
.reg = trace_event_reg, \
|
|
_TRACE_PERF_INIT(call) \
|
|
};
|
|
|
|
#undef DEFINE_EVENT
|
|
#define DEFINE_EVENT(template, call, proto, args) \
|
|
\
|
|
static struct trace_event_call __used event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &trace_event_type_funcs_##template, \
|
|
.print_fmt = print_fmt_##template, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct trace_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 char print_fmt_##call[] = print; \
|
|
\
|
|
static struct trace_event_call __used event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &trace_event_type_funcs_##call, \
|
|
.print_fmt = print_fmt_##call, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct trace_event_call __used \
|
|
__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
|
|
|
|
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
|