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576b523721
linux_dsm_epyc7002/tools/perf/util
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Masami Hiramatsu 576b523721 perf probe: Fix probing symbols with optimization suffix 
Fix perf probe to probe on some symbols which have some optimzation
suffixes, e.g. ".part", ".isra", and ".constprop".

To fix this issue, instead of using the DIE name, perf probe uses the
symbol name found by dwfl_module_addrsym().

This also involves a perf probe --vars operation update which now shows
the symbol name instead of the DIE name.

Without this patch, putting a probe on an inlined function which was
compiled with a suffixed symbol will fail like this:

  $ perf probe -v getname_flags
  probe-definition(0): getname_flags
  symbol:getname_flags file:(null) line:0 offset:0 return:0 lazy:(null)
  0 arguments
  Looking at the vmlinux_path (6 entries long)
  Using /lib/modules/3.11.0+/build/vmlinux for symbols
  found inline addr: 0xffffffff8119bb70
  Probe point found: getname_flags+0
  found inline addr: 0xffffffff8119bcb6
  Probe point found: getname+6
  found inline addr: 0xffffffff811a06a6
  Probe point found: user_path_at_empty+6
  find 3 probe_trace_events.
  Opening /sys/kernel/debug//tracing/kprobe_events write=1
  Added new events:
  Writing event: p:probe/getname_flags getname_flags+0
  Failed to write event: No such file or directory
    Error: Failed to add events. (-1)

Because the debuginfo knows only the original (non suffix) symbol name,
it uses the original symbol for probe address but the kernel (kallsyms)
knows only suffixed symbol.  Then, the kernel rejects that original
symbol.

This patch uses dwfl_module_addrsym() to get the correct (suffixed)
symbol from symtab when a probe point is found.

Reported-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20130925131616.31632.46658.stgit@udc4-manage.rcp.hitachi.co.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-09-25 12:27:31 -03:00
..
include perf tools: Default to cpu// for events v5 2013-07-12 13:53:52 -03:00
scripting-engines perf script: Fix named threads support 2013-07-22 11:55:53 -03:00
abspath.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
alias.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
annotate.c perf annotate: Fix objdump line parsing offset validation 2013-09-19 11:32:17 -03:00
annotate.h perf tools: Remove dependency on libnewt 2013-04-01 12:23:21 -03:00
bitmap.c perf tools: Add bitmap_or function into bitmap object 2012-02-13 23:28:10 -02:00
build-id.c perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
build-id.h perf tools: Move BUILD_ID_SIZE into build-id object 2012-10-29 11:35:32 -02:00
cache.h perf ui: Always compile browser setup code 2012-11-14 16:53:03 -03:00
callchain.c perf callchain: Remove unnecessary validation 2013-08-29 15:11:29 -03:00
callchain.h perf callchain: Remove unnecessary validation 2013-08-29 15:11:29 -03:00
cgroup.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
cgroup.h perf tool: Add cgroup support 2011-02-16 13:30:48 +01:00
color.c perf tools: Use scnprintf where applicable 2012-03-14 12:36:19 -03:00
color.h perf hist: Replace ->print() routines by ->snprintf() equivalents 2010-04-02 16:28:15 -03:00
config.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
cpumap.c perf stat: Add per-core aggregation 2013-03-25 16:13:26 -03:00
cpumap.h perf tools: Rename cpu_map__all() to cpu_map__empty() 2013-07-12 13:45:44 -03:00
ctype.c perf tools: ctype.c only wants util.h 2012-02-13 23:17:40 -02:00
debug.c perf tools: Fix TUI helpline output 2012-12-09 08:46:07 -03:00
debug.h perf evsel: Introduce perf_evsel__open_strerror method 2013-01-24 16:40:09 -03:00
dso.c perf symbols: Add support for reading from /proc/kcore 2013-08-07 17:35:33 -03:00
dso.h perf symbols: Add support for reading from /proc/kcore 2013-08-07 17:35:33 -03:00
dwarf-aux.c perf probe: Fix finder to find lines of given function 2013-09-19 11:35:05 -03:00
dwarf-aux.h perf probe: Fix finder to find lines of given function 2013-09-19 11:35:05 -03:00
environment.c
event.c perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
event.h perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
evlist.c perf evlist: Fix id pos in perf_evlist__open() 2013-09-09 15:51:44 -03:00
evlist.h perf tests: Add 'keep tracking' test 2013-09-02 14:58:20 -03:00
evsel.c perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
evsel.h perf tools: Add support for PERF_SAMPLE_IDENTIFIER 2013-08-29 16:09:31 -03:00
exec_cmd.c perf tools: Makefile: Remove various and sundry cruft 2011-02-18 07:43:06 -02:00
exec_cmd.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
generate-cmdlist.sh perf tools: Convert to LIBELF_SUPPORT 2012-09-28 21:07:36 -03:00
header.c perf tools: Fix buildid cache handling of kallsyms with kcore 2013-09-19 11:32:17 -03:00
header.h perf header: Recognize version number for perf data file 2013-07-17 17:04:00 -03:00
help.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
help.h
hist.c perf session: Check for SIGINT in more loops 2013-09-19 11:32:17 -03:00
hist.h perf tools: Move hist_entry__period_snprintf into stdio code 2013-07-12 13:54:18 -03:00
hweight.c perf tools: Don't use code surrounded by __KERNEL__ 2010-05-02 12:00:44 -03:00
intlist.c perf tools: Allow passing a list to intlist__new 2013-01-24 16:40:53 -03:00
intlist.h perf tools: Allow passing a list to intlist__new 2013-01-24 16:40:53 -03:00
levenshtein.c
levenshtein.h
machine.c perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
machine.h perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
map.c perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
map.h perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
pager.c perf tools: Fix pager on minimal-install embedded systems 2012-05-30 15:10:39 -03:00
parse-events.c perf list: Skip unsupported events 2013-09-02 14:58:21 -03:00
parse-events.h perf parse events: Demystify memory allocations 2013-07-12 13:52:05 -03:00
parse-events.l perf tools: Add support for PERF_COUNT_SW_DUMMY 2013-09-02 14:58:20 -03:00
parse-events.y perf parse events: Demystify memory allocations 2013-07-12 13:52:05 -03:00
parse-options.c perf tools: Long option completion support for each subcommands 2012-10-02 18:36:44 -03:00
parse-options.h perf tools: Long option completion support for each subcommands 2012-10-02 18:36:44 -03:00
path.c perf tools: Convert to HAVE_STRLCPY 2012-10-02 18:36:24 -03:00
perf_regs.h perf tools: Convert to LIBUNWIND_SUPPORT 2012-10-02 17:56:01 -03:00
PERF-VERSION-GEN perf tools: Fix perf version generation 2013-07-08 18:09:52 -03:00
pmu.c perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
pmu.h perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
pmu.l perf tools: Add perf pmu object to access pmu format definition 2012-03-16 14:29:35 -03:00
pmu.y perf tools: Fix build with bison 2.3 and older. 2013-02-14 16:12:34 -03:00
probe-event.c perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
probe-event.h perf probe: Provide perf interface for uprobes 2012-05-11 13:58:17 -03:00
probe-finder.c perf probe: Fix probing symbols with optimization suffix 2013-09-25 12:27:31 -03:00
probe-finder.h perf probe: Fix probing symbols with optimization suffix 2013-09-25 12:27:31 -03:00
pstack.c perf tools: Stop using 'self' in pstack 2012-11-14 16:50:38 -03:00
pstack.h perf ui: Move hists browser to util/ui/browsers/ 2010-08-10 16:11:08 -03:00
python-ext-sources perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
python.c perf tools: Add support for PERF_COUNT_SW_DUMMY 2013-09-02 14:58:20 -03:00
quote.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
quote.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
rblist.c Account the nr_entries in rblist properly 2012-10-24 14:20:11 -02:00
rblist.h perf tools: Introducing rblist 2012-08-03 10:37:21 -03:00
record.c perf tools: Add support for PERF_SAMPLE_IDENTIFIER 2013-08-29 16:09:31 -03:00
run-command.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
run-command.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
session.c perf session: Check for SIGINT in more loops 2013-09-19 11:32:17 -03:00
session.h perf session: Check for SIGINT in more loops 2013-09-19 11:32:17 -03:00
setup.py perf tools: Merge all *CFLAGS* make variable into CFLAGS 2013-05-30 16:12:03 +03:00
sigchain.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sigchain.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sort.c perf tools: Move weight back to common sort keys 2013-07-22 16:58:28 -03:00
sort.h perf tools: Move weight back to common sort keys 2013-07-22 16:58:28 -03:00
stat.c perf stats: Add max and min stats 2013-08-07 17:35:26 -03:00
stat.h perf stats: Add max and min stats 2013-08-07 17:35:26 -03:00
strbuf.c perf tools: Fix strbuf_addf() when the buffer needs to grow 2012-10-30 10:32:56 -02:00
strbuf.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
strfilter.c perf: Fix missing strndup declaration 2011-03-04 01:17:18 +01:00
strfilter.h perf tools: Add strfilter for general purpose string filter 2011-01-28 09:19:38 -02:00
string.c perf tools: Default to cpu// for events v5 2013-07-12 13:53:52 -03:00
strlist.c perf probe: Fix segfault 2013-03-13 17:00:33 -03:00
strlist.h perf tools: Stop using 'self' in strlist 2013-01-25 12:49:28 -03:00
svghelper.c perf timechart: Fix black idle boxes in the title 2011-02-28 08:56:14 +01:00
svghelper.h
symbol-elf.c perf tools: Fix compile with libelf without get_phdrnum 2013-09-19 11:32:17 -03:00
symbol-minimal.c perf symbols: Add support for reading from /proc/kcore 2013-08-07 17:35:33 -03:00
symbol.c perf tools: Fix symbol offset computation for some dsos 2013-09-02 14:58:21 -03:00
symbol.h perf symbols: Add support for reading from /proc/kcore 2013-08-07 17:35:33 -03:00
sysfs.c perf tools: Fix possible (unlikely) buffer overflow 2013-01-24 16:40:18 -03:00
sysfs.h perf tools: Add sysfs mountpoint interface 2012-02-13 23:27:15 -02:00
target.c perf tools: Replace mempcpy with memcpy 2012-09-05 19:35:21 -03:00
target.h perf target: Add uses_mmap field 2012-05-17 12:32:54 -03:00
thread_map.c perf tools: fix thread_map__new_by_pid_str() memory leak in error path 2012-05-25 11:40:59 -03:00
thread_map.h perf evlist: Add thread_map__nr() helper 2013-03-15 13:06:02 -03:00
thread.c perf tools: Add pid to struct thread 2013-08-27 11:05:53 -03:00
thread.h perf tools: Add pid to struct thread 2013-08-27 11:05:53 -03:00
tool.h perf tools: Add attr->mmap2 support 2013-09-11 10:09:32 -03:00
top.c perf top: Fix percent output when no samples collected 2013-05-28 16:23:59 +03:00
top.h perf top: move CONSOLE_CLEAR to header file 2013-08-07 17:35:26 -03:00
trace-event-info.c perf util: No need to call read_trace_init() in tracing_data_header() 2013-07-12 13:52:31 -03:00
trace-event-parse.c perf tools: Fix old GCC build error in trace-event-parse.c:parse_proc_kallsyms() 2013-09-19 15:08:47 -03:00
trace-event-read.c perf util: Parse header_page to get proper long size 2013-07-12 13:52:24 -03:00
trace-event-scripting.c perf script: Fix named threads support 2013-07-22 11:55:53 -03:00
trace-event.h perf script: Fix named threads support 2013-07-22 11:55:53 -03:00
types.h perf tools: Add union u64_swap type for swapping u64 data 2012-05-22 12:50:25 -03:00
unwind.c perf tools: Remove filter parameter of thread__find_addr_map() 2013-08-12 10:31:12 -03:00
unwind.h perf tools: Convert to LIBUNWIND_SUPPORT 2012-10-02 17:56:01 -03:00
usage.c perf target: Introduce perf_target__parse_uid() 2012-05-07 16:46:48 -03:00
util.c perf util: Add parse_nsec_time() function 2013-08-07 17:35:26 -03:00
util.h perf util: Add parse_nsec_time() function 2013-08-07 17:35:26 -03:00
values.c perf tools: Fix a memory leak on perf_read_values_destroy 2011-12-20 13:41:34 -02:00
values.h
vdso.c perf symbols: Fix vdso list searching 2013-07-08 17:59:07 -03:00
vdso.h perf tools: Back [vdso] DSO with real data 2012-09-11 12:08:30 -03:00
wrapper.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
xyarray.c perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00
xyarray.h perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00