mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-13 23:34:05 +08:00
770cb24345
Impact: allow user apps to read binary format of basic ftrace entries
Currently, only defined raw events export their formats so a binary
reader can parse them. There's no reason that the default ftrace entries
can't export their formats.
This patch adds a subsystem called "ftrace" in the events directory
that includes the ftrace entries for basic ftrace recorded items.
These only have three files in the events directory:
type : printf
available_types : printf
format : format for the event entry
For example:
# cat /debug/tracing/events/ftrace/wakeup/format
name: wakeup
ID: 3
format:
field:unsigned char type; offset:0; size:1;
field:unsigned char flags; offset:1; size:1;
field:unsigned char preempt_count; offset:2; size:1;
field:int pid; offset:4; size:4;
field:int tgid; offset:8; size:4;
field:unsigned int prev_pid; offset:12; size:4;
field:unsigned char prev_prio; offset:16; size:1;
field:unsigned char prev_state; offset:17; size:1;
field:unsigned int next_pid; offset:20; size:4;
field:unsigned char next_prio; offset:24; size:1;
field:unsigned char next_state; offset:25; size:1;
field:unsigned int next_cpu; offset:28; size:4;
print fmt: "%u:%u:%u ==+ %u:%u:%u [%03u]"
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
47 lines
1.6 KiB
Makefile
47 lines
1.6 KiB
Makefile
|
|
# Do not instrument the tracer itself:
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
ORIG_CFLAGS := $(KBUILD_CFLAGS)
|
|
KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
|
|
|
|
# selftest needs instrumentation
|
|
CFLAGS_trace_selftest_dynamic.o = -pg
|
|
obj-y += trace_selftest_dynamic.o
|
|
endif
|
|
|
|
# If unlikely tracing is enabled, do not trace these files
|
|
ifdef CONFIG_TRACING_BRANCHES
|
|
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
|
|
endif
|
|
|
|
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
|
|
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
|
|
|
|
obj-$(CONFIG_TRACING) += trace.o
|
|
obj-$(CONFIG_TRACING) += trace_clock.o
|
|
obj-$(CONFIG_TRACING) += trace_output.o
|
|
obj-$(CONFIG_TRACING) += trace_stat.o
|
|
obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o
|
|
obj-$(CONFIG_SYSPROF_TRACER) += trace_sysprof.o
|
|
obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o
|
|
obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o
|
|
obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o
|
|
obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o
|
|
obj-$(CONFIG_NOP_TRACER) += trace_nop.o
|
|
obj-$(CONFIG_STACK_TRACER) += trace_stack.o
|
|
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
|
|
obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
|
|
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
|
|
obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
|
|
obj-$(CONFIG_HW_BRANCH_TRACER) += trace_hw_branches.o
|
|
obj-$(CONFIG_POWER_TRACER) += trace_power.o
|
|
obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
|
|
obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
|
|
obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
|
|
obj-$(CONFIG_EVENT_TRACER) += trace_events.o
|
|
obj-$(CONFIG_EVENT_TRACER) += events.o
|
|
obj-$(CONFIG_EVENT_TRACER) += trace_export.o
|
|
|
|
libftrace-y := ftrace.o
|