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linux/tools/perf/util
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Namhyung Kim 25dd9171f5 perf probe: Fix probing kretprobes 
The commit dfef99cd0b ("perf probe: Use ref_reloc_sym based address
instead of the symbol name") converts kprobes to use ref_reloc_sym (i.e.
_stext) and offset instead of using symbol's name directly.  So on my
system, adding do_fork ends up with like below:

  $ sudo perf probe -v --add do_fork%return
  probe-definition(0): do_fork%return
  symbol:do_fork file:(null) line:0 offset:0 return:1 lazy:(null)
  0 arguments
  Looking at the vmlinux_path (7 entries long)
  Using /lib/modules/3.17.6-1-ARCH/build/vmlinux for symbols
  Could not open debuginfo. Try to use symbols.
  Opening /sys/kernel/debug/tracing/kprobe_events write=1
  Added new event:
  Writing event: r:probe/do_fork _stext+456136
  Failed to write event: Invalid argument
  Error: Failed to add events. Reason: Operation not permitted (Code: -1)

As you can see, the do_fork was translated to _stext+456136.  This was
because to support (local) symbols that have same name.  But the problem
is that kretprobe requires to be inserted at function start point so it
simply checks whether it's called with offset 0.  And if not, it'll
return with -EINVAL.  You can see it with dmesg.

  $ dmesg | tail -1
    [125621.764103] Return probe must be used without offset.

So we need to use the symbol name instead of ref_reloc_sym in case of
return probes.

Reported-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1421234288-22758-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-01-21 10:06:24 -03:00
..
include tools: Remove bitops/hweight usage of bits in tools/perf 2015-01-16 17:49:29 -03:00
scripting-engines perf script python: Removing event cache as it's no longer needed 2014-11-06 17:44:06 -03:00
abspath.c
alias.c perf tools: Introduce zfree 2013-12-27 15:17:00 -03:00
annotate.c perf annotate: Fix memory leaks in LOCK handling 2015-01-21 10:05:32 -03:00
annotate.h perf tools: Fix segfault for symbol annotation on TUI 2015-01-16 17:49:29 -03:00
bitmap.c
build-id.c perf buildid-cache: Remove extra debugdir variables 2014-12-09 09:14:34 -03:00
build-id.h perf build-id: Move disable_buildid_cache() to util/build-id.c 2014-11-19 12:33:46 -03:00
cache.h perf tools: Elide strlcpy warning with uclibc 2015-01-16 17:49:29 -03:00
callchain.c perf callchain: Free callchains when hist entries are deleted 2015-01-08 11:56:35 -03:00
callchain.h perf callchain: Free callchains when hist entries are deleted 2015-01-08 11:56:35 -03:00
cgroup.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
cgroup.h
cloexec.c perf util: Replace strerror with strerror_r for thread-safety 2014-08-15 10:58:35 -03:00
cloexec.h perf tools: Enable close-on-exec flag on perf file descriptor 2014-07-18 09:09:34 +02:00
color.c perf tools: Make __hpp__fmt() receive an additional len argument 2014-08-12 12:03:05 -03:00
color.h perf tools: Make __hpp__fmt() receive an additional len argument 2014-08-12 12:03:05 -03:00
comm.c perf tools: Identify which comms are from exec 2014-08-13 19:23:08 -03:00
comm.h perf tools: Add facility to export data in database-friendly way 2014-10-29 10:32:49 -02:00
config.c perf tools: Add --buildid-dir option to set cache directory 2014-12-09 09:14:35 -03:00
cpumap.c perf tools: Use cpu/possible instead of cpu/kernel_max 2014-04-22 17:39:16 +02:00
cpumap.h perf tools: Allow ability to map cpus to nodes easily 2014-04-22 17:39:12 +02:00
ctype.c
data.c perf util: Replace strerror with strerror_r for thread-safety 2014-08-15 10:58:35 -03:00
data.h perf tools: Add perf_data_file__write interface 2013-12-02 09:22:46 -03:00
db-export.c perf tools: Defer export of comms that were not 'set' 2014-11-03 18:11:59 -03:00
db-export.h perf tools: Defer export of comms that were not 'set' 2014-11-03 18:11:59 -03:00
debug.c perf tools: Allow to force redirect pr_debug to stderr. 2014-11-24 18:03:48 -03:00
debug.h perf: Use strerror_r instead of strerror 2014-08-15 10:54:29 -03:00
dso.c perf tools: Add gzip decompression support for kernel module 2014-11-05 10:11:26 -03:00
dso.h perf symbols: Preparation for compressed kernel module support 2014-11-04 10:15:53 -03:00
dwarf-aux.c perf probe: Fix perf probe to find correct variable DIE 2014-06-04 14:49:20 +02:00
dwarf-aux.h perf probe: Fix to find line information for probe list 2013-10-04 15:16:05 -03:00
environment.c
event.c perf tools: Add id index 2014-10-29 11:24:47 -02:00
event.h Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-09 21:18:06 -08:00
evlist.c perf evlist: Remove extraneous 'was' on error message 2015-01-21 10:04:15 -03:00
evlist.h perf evlist: Introduce strerror_mmap method 2014-12-11 18:03:01 -03:00
evsel.c perf tools: Remove perf_evsel__read interface 2014-12-01 20:00:30 -03:00
evsel.h perf stat: Add support for per-pkg counters 2014-12-01 20:00:30 -03:00
exec_cmd.c
exec_cmd.h
find-vdso-map.c perf tools: Build programs to copy 32-bit compatibility 2014-10-29 10:32:48 -02:00
generate-cmdlist.sh tools/perf: Standardize feature support define names to: HAVE_{FEATURE}_SUPPORT 2013-10-09 08:48:28 +02:00
header.c perf build-id: Move disable_buildid_cache() to util/build-id.c 2014-11-19 12:33:46 -03:00
header.h perf build-id: Move build-id related functions to util/build-id.c 2014-11-05 10:14:07 -03:00
help.c perf tools: Use zfree to help detect use after free bugs 2013-12-27 17:08:19 -03:00
help.h
hist.c perf callchain: Free callchains when hist entries are deleted 2015-01-08 11:56:35 -03:00
hist.h perf report: Show progress bar for output resorting 2014-12-23 12:01:37 -03:00
intlist.c perf util: Add findnew method to intlist 2013-10-14 10:28:48 -03:00
intlist.h perf util: Add findnew method to intlist 2013-10-14 10:28:48 -03:00
kvm-stat.h perf kvm stat report: Save pid string in opts.target.pid 2014-09-17 17:08:07 -03:00
levenshtein.c
levenshtein.h
machine.c perf machine: Fix __machine__findnew_thread() error path 2015-01-16 17:49:28 -03:00
machine.h perf tools: Add facility to export data in database-friendly way 2014-10-29 10:32:49 -02:00
map.c perf callchain: Make get_srcline fall back to sym+offset 2014-11-24 18:03:47 -03:00
map.h perf symbols: Introduce 'for' method to iterate over the symbols with a given name 2015-01-21 10:06:15 -03:00
ordered-events.c perf session: Add option to copy events when queueing 2014-10-15 17:39:03 -03:00
ordered-events.h perf session: Add option to copy events when queueing 2014-10-15 17:39:03 -03:00
pager.c perf tools: Add cat as fallback pager 2014-05-21 11:48:33 +02:00
parse-events.c perf tools: Add snapshot format file parsing 2014-11-24 18:03:51 -03:00
parse-events.h perf tools: Parse the pmu event prefix and suffix 2014-10-15 16:05:01 -03:00
parse-events.l perf tools: Add support to new style format of kernel PMU event 2014-10-15 16:05:45 -03:00
parse-events.y perf tools: Add support to new style format of kernel PMU event 2014-10-15 16:05:45 -03:00
parse-options.c perf tools: Add support for exclusive option 2014-10-29 10:32:47 -02:00
parse-options.h perf tools: Add support for exclusive option 2014-10-29 10:32:47 -02:00
path.c tools/perf: Turn strlcpy() into a __weak function 2013-10-09 08:48:49 +02:00
perf_regs.c perf tools: Cache register accesses for unwind processing 2014-06-12 16:53:19 +02:00
perf_regs.h perf tools: Cache register accesses for unwind processing 2014-06-12 16:53:19 +02:00
PERF-VERSION-GEN perf tools: Fix version when building out of tree 2013-11-07 10:40:47 -03:00
pmu.c perf tools: Add snapshot format file parsing 2014-11-24 18:03:51 -03:00
pmu.h perf tools: Add snapshot format file parsing 2014-11-24 18:03:51 -03:00
pmu.l
pmu.y perf tools: Fix build with bison 2.3 and older. 2013-02-14 16:12:34 -03:00
probe-event.c perf probe: Fix probing kretprobes 2015-01-21 10:06:24 -03:00
probe-event.h perf probe: Do not access kallsyms when analyzing user binaries 2014-09-17 18:01:14 -03:00
probe-finder.c perf probe: Fix crash in dwarf_getcfi_elf 2015-01-02 12:44:01 -03:00
probe-finder.h perf probe: Support distro-style debuginfo for uprobe 2014-02-18 09:38:44 -03:00
pstack.c perf tools: Move pr_* debug macros into debug object 2014-07-17 12:58:39 -03:00
pstack.h perf tools: Finish the removal of 'self' arguments 2013-11-05 15:32:36 -03:00
python-ext-sources tools: Remove bitops/hweight usage of bits in tools/perf 2015-01-16 17:49:29 -03:00
python.c tools lib api: Adopt fdarray class from perf's evlist 2014-09-25 16:46:55 -03:00
quote.c
quote.h
rblist.c perf util: Add findnew method to intlist 2013-10-14 10:28:48 -03:00
rblist.h perf util: Add findnew method to intlist 2013-10-14 10:28:48 -03:00
record.c perf tools: Use sysctl__read_int instead of ad-hoc copies 2014-12-11 17:53:04 -03:00
run-command.c perf util: Replace strerror with strerror_r for thread-safety 2014-08-15 10:58:35 -03:00
run-command.h
session.c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-09 21:18:06 -08:00
session.h perf session: Add perf_session__deliver_synth_event() 2014-10-29 11:36:15 -02:00
setup.py tools/: Convert to new topic libraries 2013-12-16 16:03:27 -03:00
sigchain.c
sigchain.h
sort.c perf callchain: Make get_srcline fall back to sym+offset 2014-11-24 18:03:47 -03:00
sort.h perf tools: Add +field argument support for --field option 2014-08-24 08:11:19 -03:00
srcline.c perf: Fix building warning on ARM 32 2014-12-19 13:09:43 +01:00
stat.c perf stats: Add max and min stats 2013-08-07 17:35:26 -03:00
stat.h tools: Consolidate types.h 2014-05-01 21:22:39 +02:00
strbuf.c perf tools: Use zfree to help detect use after free bugs 2013-12-27 17:08:19 -03:00
strbuf.h
strfilter.c perf tools: Use zfree to help detect use after free bugs 2013-12-27 17:08:19 -03:00
strfilter.h perf tools: Finish the removal of 'self' arguments 2013-11-05 15:32:36 -03:00
string.c Revert "perf tools: Default to cpu// for events v5" 2014-10-15 16:04:33 -03:00
strlist.c perf tools: Fix build error due to zfree() cast 2014-01-15 15:10:04 -03:00
strlist.h perf tools: Stop using 'self' in strlist 2013-01-25 12:49:28 -03:00
svghelper.c perf timechart: Implement IO mode 2014-07-10 00:22:54 +02:00
svghelper.h perf timechart: Implement IO mode 2014-07-10 00:22:54 +02:00
symbol-elf.c perf symbols: Move bfd_demangle stubbing to its only user 2014-11-24 18:03:47 -03:00
symbol-minimal.c perf symbols: Fix use after free in filename__read_build_id 2014-12-17 11:58:17 -03:00
symbol.c perf symbols: Introduce method to iterate symbols ordered by name 2015-01-21 10:05:54 -03:00
symbol.h perf symbols: Introduce method to iterate symbols ordered by name 2015-01-21 10:05:54 -03:00
target.c perf record: Make per-cpu mmaps the default. 2013-11-27 14:58:36 -03:00
target.h perf target: Move the checking of which map function to call into function. 2013-12-04 13:46:37 -03:00
thread_map.c perf thread_map: Create dummy constructor out of open coded equivalent 2014-10-14 17:32:52 -03:00
thread_map.h perf thread_map: Create dummy constructor out of open coded equivalent 2014-10-14 17:32:52 -03:00
thread-stack.c perf tools: Enhance the thread stack to output call/return data 2014-11-03 17:43:56 -03:00
thread-stack.h perf tools: Enhance the thread stack to output call/return data 2014-11-03 17:43:56 -03:00
thread.c perf tools: Only override the default :tid comm entry 2014-11-19 12:37:26 -03:00
thread.h perf tools: Add a thread stack for synthesizing call chains 2014-11-03 17:10:59 -03:00
tool.h perf tools: Add id index 2014-10-29 11:24:47 -02:00
top.c perf tools: Rename 'perf_record_opts' to 'record_opts 2013-12-19 14:43:45 -03:00
top.h tools: Consolidate types.h 2014-05-01 21:22:39 +02:00
trace-event-info.c perf tools: Move pr_* debug macros into debug object 2014-07-17 12:58:39 -03:00
trace-event-parse.c perf tools: Fix memory leak in event_format__print function 2014-02-18 09:34:47 -03:00
trace-event-read.c perf tools: Remove needless getopt.h includes 2014-07-17 12:59:00 -03:00
trace-event-scripting.c perf scripting: Add 'flush' callback to scripting API 2014-08-22 13:12:11 -03:00
trace-event.c tools lib traceevent: Make plugin unload function receive pevent 2014-01-15 15:10:40 -03:00
trace-event.h perf scripting: Add 'flush' callback to scripting API 2014-08-22 13:12:11 -03:00
tsc.c perf tools: Move rdtsc() function 2014-07-23 11:48:11 -03:00
tsc.h perf tools: Move rdtsc() function 2014-07-23 11:48:11 -03:00
unwind-libdw.c perf callchains: Use thread->mg->machine 2014-10-29 10:32:46 -02:00
unwind-libdw.h perf tools: Add libdw DWARF post unwind support 2014-02-24 09:29:36 -03:00
unwind-libunwind.c perf test: Fix dwarf unwind using libunwind. 2015-01-16 17:49:29 -03:00
unwind.h perf callchains: Use thread->mg->machine 2014-10-29 10:32:46 -02:00
usage.c
util.c perf tools: Use sysctl__read_int instead of ad-hoc copies 2014-12-11 17:53:04 -03:00
util.h perf: Fix building warning on ARM 32 2014-12-19 13:09:43 +01:00
values.c perf tools: Use zfree to help detect use after free bugs 2013-12-27 17:08:19 -03:00
values.h tools: Consolidate types.h 2014-05-01 21:22:39 +02:00
vdso.c perf tools: Do not attempt to run perf-read-vdso32 if it wasn't built 2014-10-29 10:32:48 -02:00
vdso.h perf tools: Add support for 32-bit compatibility VDSOs 2014-10-29 10:32:48 -02:00
wrapper.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
xyarray.c
xyarray.h
zlib.c perf tools: Add gzip decompression support for kernel module 2014-11-05 10:11:26 -03:00