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authorMasami Hiramatsu <mhiramat@redhat.com>2009-11-03 19:12:47 -0500
committerIngo Molnar <mingo@elte.hu>2009-11-04 13:02:48 +0100
commit77b44d1b7c28360910cdbd427fb62d485c08674c (patch)
tree00db4f966b488abb88e5f3884ab2635e06f3f1d6 /kernel
parent91365bbe4f8c39a821f390f785d606304d6dee3c (diff)
tracing/kprobes: Rename Kprobe-tracer to kprobe-event
Rename Kprobes-based event tracer to kprobes-based tracing event (kprobe-event), since it is not a tracer but an extensible tracing event interface. This also changes CONFIG_KPROBE_TRACER to CONFIG_KPROBE_EVENT and sets it y by default. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Jason Baron <jbaron@redhat.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> LKML-Reference: <20091104001247.3454.14131.stgit@harusame> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/Kconfig19
-rw-r--r--kernel/trace/Makefile2
-rw-r--r--kernel/trace/trace_kprobe.c6
3 files changed, 15 insertions, 12 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 15372a9f239..f05671609a8 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -428,17 +428,22 @@ config BLK_DEV_IO_TRACE
If unsure, say N.
-config KPROBE_TRACER
+config KPROBE_EVENT
depends on KPROBES
depends on X86
- bool "Trace kprobes"
+ bool "Enable kprobes-based dynamic events"
select TRACING
- select GENERIC_TRACER
+ default y
help
- This tracer probes everywhere where kprobes can probe it, and
- records various registers and memories specified by user.
- This also allows you to trace kprobe probe points as a dynamic
- defined events. It provides per-probe event filtering interface.
+ This allows the user to add tracing events (similar to tracepoints) on the fly
+ via the ftrace interface. See Documentation/trace/kprobetrace.txt
+ for more details.
+
+ Those events can be inserted wherever kprobes can probe, and record
+ various register and memory values.
+
+ This option is also required by perf-probe subcommand of perf tools. If
+ you want to use perf tools, this option is strongly recommended.
config DYNAMIC_FTRACE
bool "enable/disable ftrace tracepoints dynamically"
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index c8cb75d7f28..edc3a3cca1a 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -53,7 +53,7 @@ obj-$(CONFIG_EVENT_TRACING) += trace_export.o
obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
obj-$(CONFIG_EVENT_PROFILE) += trace_event_profile.o
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
-obj-$(CONFIG_KPROBE_TRACER) += trace_kprobe.o
+obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
obj-$(CONFIG_EVENT_TRACING) += power-traces.o
libftrace-y := ftrace.o
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index a86c3ac0df2..cf17a6694f3 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1,5 +1,5 @@
/*
- * kprobe based kernel tracer
+ * Kprobes-based tracing events
*
* Created by Masami Hiramatsu <mhiramat@redhat.com>
*
@@ -57,8 +57,6 @@ const char *reserved_field_names[] = {
FIELD_STRING_FUNC,
};
-/* currently, trace_kprobe only supports X86. */
-
struct fetch_func {
unsigned long (*func)(struct pt_regs *, void *);
void *data;
@@ -191,7 +189,7 @@ static __kprobes void free_indirect_fetch_data(struct indirect_fetch_data *data)
}
/**
- * Kprobe tracer core functions
+ * Kprobe event core functions
*/
struct probe_arg {