Oleg Nesterov f42d24a1d2 uprobes/perf: Teach trace_uprobe/perf code to use UPROBE_HANDLER_REMOVE ...

Change uprobe_trace_func() and uprobe_perf_func() to return "int". Change
uprobe_dispatcher() to return "trace_ret | perf_ret" although this is not
needed, currently TP_FLAG_TRACE/TP_FLAG_PROFILE are mutually exclusive.

The only functional change is that uprobe_perf_func() checks the filtering
too and returns UPROBE_HANDLER_REMOVE if nobody wants to trace current.

Testing:

	# perf probe -x /lib/libc.so.6 syscall

	# perf record -e probe_libc:syscall -i perl -e 'fork; syscall -1 for 1..10; wait'

	# perf report --show-total-period
		100.00%            10     perl  libc-2.8.so    [.] syscall

Before this patch:

	# cat /sys/kernel/debug/tracing/uprobe_profile
		/lib/libc.so.6 syscall				20

A child process doesn't have a counter, but still it hits this breakoint
"copied" by dup_mmap().

After the patch:

	# cat /sys/kernel/debug/tracing/uprobe_profile
		/lib/libc.so.6 syscall				11

The child process hits this int3 only once and does unapply_uprobe().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>

2013-02-08 18:28:07 +01:00

..

blktrace.c

tracing: Use this_cpu_ptr per-cpu helper

2013-01-21 13:22:30 -05:00

ftrace.c

tracing: Avoid unnecessary multiple recursion checks

2013-01-22 23:38:01 -05:00

Kconfig

tracing: Make a snapshot feature available from userspace

2013-01-30 11:02:06 -05:00

Makefile

trace: Stop compiling in trace_clock unconditionally

2012-09-13 22:52:08 -04:00

power-traces.c

perf: Clean up power events by introducing new, more generic ones

2011-01-04 08:16:54 +01:00

ring_buffer_benchmark.c

tracing: Use NUMA allocation for per-cpu ring buffer pages

2011-06-14 22:04:39 -04:00

ring_buffer.c

ring-buffer: Add stats field for amount read from trace ring buffer

2013-01-30 11:01:53 -05:00

rpm-traces.c

PM / Runtime: Introduce trace points for tracing rpm_* functions

2011-09-27 22:53:27 +02:00

trace_branch.c

tracing: Cache comms only after an event occurred

2012-10-31 16:45:31 -04:00

trace_clock.c

tracing: Use sched_clock_cpu for trace_clock_global

2013-01-30 11:02:05 -05:00

trace_entries.h

Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent

2012-03-24 08:19:09 +01:00

trace_event_perf.c

Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

2012-08-21 11:27:00 +02:00

trace_events_filter_test.h

tracing/filter: Add startup tests for events filter

2011-08-19 14:35:59 -04:00

trace_events_filter.c

tracing: Replace strict_strto* with kstrto*

2012-10-31 16:45:23 -04:00

trace_events.c

tracing: Remove the extra 4 bytes of padding in events

2013-01-21 21:05:41 -05:00

trace_export.c

tracing: Do not enable function event with enable

2012-05-10 15:55:43 -04:00

trace_functions_graph.c

tracing/fgraph: Adjust fgraph depth before calling trace return callback

2013-01-29 17:30:31 -05:00

trace_functions.c

tracing: Fix unsigned int compare of zero in recursion check

2013-01-24 07:52:34 -05:00

trace_irqsoff.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-12-13 12:00:02 -08:00

trace_kdb.c

kdb,ftdump: Remove reference to internal kdb include

2010-10-22 15:34:11 -05:00

trace_kprobe.c

tracing: Use irq_work for wake ups and remove *_nowake_*() functions

2012-11-02 10:21:52 -04:00

trace_mmiotrace.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

trace_nop.c

…

trace_output.c

tracing: Format non-nanosec times from tsc clock without a decimal point.

2012-11-13 15:48:40 -05:00

trace_output.h

tracing: Allow events to share their print functions

2010-05-14 14:20:32 -04:00

trace_printk.c

tracing: Add percpu buffers for trace_printk()

2012-04-23 21:15:55 -04:00

trace_probe.c

tracing: Replace strict_strto* with kstrto*

2012-10-31 16:45:23 -04:00

trace_probe.h

uprobes/tracing: Introduce is_trace_uprobe_enabled()

2013-02-08 18:24:30 +01:00

trace_sched_switch.c

tracing: Use irq_work for wake ups and remove *_nowake_*() functions

2012-11-02 10:21:52 -04:00

trace_sched_wakeup.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-12-13 12:00:02 -08:00

trace_selftest_dynamic.c

ftrace: Add self-tests for multiple function trace users

2011-05-18 19:24:51 -04:00

trace_selftest.c

ftrace: Fix function tracing recursion self test

2013-01-22 23:37:58 -05:00

trace_stack.c

tracing: Remove unneeded checks from the stack tracer

2012-11-19 15:07:13 -05:00

trace_stat.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

trace_stat.h

tracing/stat: Add stat_release() callback

2009-07-10 12:14:05 +02:00

trace_syscalls.c

tracing/syscalls: Make local functions static

2013-01-21 13:22:31 -05:00

trace_uprobe.c

uprobes/perf: Teach trace_uprobe/perf code to use UPROBE_HANDLER_REMOVE

2013-02-08 18:28:07 +01:00

trace.c

tracing: Init current_trace to nop_trace and remove NULL checks

2013-02-01 18:38:47 -05:00

trace.h

tracing: Make a snapshot feature available from userspace

2013-01-30 11:02:06 -05:00