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2ddfd31afc
linux/tools/perf/util
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Milian Wolff 2ddfd31afc perf report: Ensure the perf DSO mapping matches what libdw sees 
[ Upstream commit 2538b9e245 ]

In some situations the libdw unwinder stopped working properly.  I.e.
with libunwind we see:

~~~~~
heaptrack_gui  2228 135073.400112:     641314 cycles:
	            e8ed _dl_fixup (/usr/lib/ld-2.25.so)
	           15f06 _dl_runtime_resolve_sse_vex (/usr/lib/ld-2.25.so)
	           ed94c KDynamicJobTracker::KDynamicJobTracker (/home/milian/projects/compiled/kf5/lib64/libKF5KIOWidgets.so.5.35.0)
	           608f3 _GLOBAL__sub_I_kdynamicjobtracker.cpp (/home/milian/projects/compiled/kf5/lib64/libKF5KIOWidgets.so.5.35.0)
	            f199 call_init.part.0 (/usr/lib/ld-2.25.so)
	            f2a5 _dl_init (/usr/lib/ld-2.25.so)
	             db9 _dl_start_user (/usr/lib/ld-2.25.so)
~~~~~

But with libdw and without this patch this sample is not properly
unwound:

~~~~~
heaptrack_gui  2228 135073.400112:     641314 cycles:
	            e8ed _dl_fixup (/usr/lib/ld-2.25.so)
	           15f06 _dl_runtime_resolve_sse_vex (/usr/lib/ld-2.25.so)
	           ed94c KDynamicJobTracker::KDynamicJobTracker (/home/milian/projects/compiled/kf5/lib64/libKF5KIOWidgets.so.5.35.0)
~~~~~

Debug output showed me that libdw found a module for the last frame
address, but it thinks it belongs to /usr/lib/ld-2.25.so. This patch
double-checks what libdw sees and what perf knows. If the mappings
mismatch, we now report the elf known to perf. This fixes the situation
above, and the libdw unwinder produces the same stack as libunwind.

Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20170602143753.16907-1-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-13 19:50:18 +02:00
..
include perf tools: regs_query_register_offset() infrastructure 2015-09-15 09:48:33 -03:00
intel-pt-decoder perf intel-pt: Ensure never to set 'last_ip' when packet 'count' is zero 2017-08-06 19:19:40 -07:00
scripting-engines perf scripting perl: Fix compile error with some perl5 versions 2017-07-15 11:57:48 +02:00
abspath.c
alias.c perf tools: Introduce zfree 2013-12-27 15:17:00 -03:00
annotate.c perf annotate: Support full source file paths for srcline fix 2015-11-11 18:41:30 -03:00
annotate.h perf annotate: Fix sizeof_sym_hist overflow issue 2015-10-05 16:15:38 -03:00
auxtrace.c perf auxtrace: Add option to synthesize branch stacks on samples 2015-09-28 16:53:44 -03:00
auxtrace.h perf auxtrace: Add option to synthesize branch stacks on samples 2015-09-28 16:53:44 -03:00
bitmap.c
bpf-loader.c perf test: Add 'perf test BPF' 2015-11-06 17:50:03 -03:00
bpf-loader.h perf test: Add 'perf test BPF' 2015-11-06 17:50:03 -03:00
Build perf tools: Enable passing bpf object file to --event 2015-10-28 12:48:12 -03:00
build-id.c perf buildid-list: Show running kernel build id fix 2015-12-07 12:02:10 -03:00
build-id.h perf buildid: Introduce sysfs/filename__sprintf_build_id 2015-08-28 14:53:50 -03:00
cache.h perf report: Fix some option handling on --stdio 2015-05-14 10:05:22 -03:00
callchain.c perf tools: Defaults to 'caller' callchain order only if --children is enabled 2015-10-22 15:40:11 -03:00
callchain.h perf tools: Improve call graph documents and help messages 2015-10-22 16:23:19 -03:00
cgroup.c perf cgroup: Use atomic.h for refcounting 2015-05-15 16:12:20 -03:00
cgroup.h perf cgroup: Use atomic.h for refcounting 2015-05-15 16:12:20 -03:00
cloexec.c perf bench numa: Fix to show proper convergence stats 2015-06-25 12:28:35 -03:00
cloexec.h perf tools: Fix build errors with mipsel-linux-uclibc compiler 2015-08-05 16:56:16 -03:00
color.c perf tools: Do not include escape sequences in color_vfprintf return 2015-08-05 16:46:06 -03:00
color.h perf tools: Remove trail argument to color vsprintf 2015-08-05 16:44:02 -03:00
comm.c perf comm: Use atomic.h for refcounting 2015-05-27 12:21:43 -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: Introduce llvm config options 2015-08-07 10:16:59 -03:00
counts.c perf stat: Move perf_counts struct and functions into separate object 2015-08-08 14:16:49 -03:00
counts.h perf stat: Move perf_counts struct and functions into separate object 2015-08-08 14:16:49 -03:00
cpumap.c perf cpu_map: Add cpu_map__empty_new function 2015-10-27 15:05:36 -03:00
cpumap.h perf cpu_map: Add cpu_map__empty_new function 2015-10-27 15:05:36 -03:00
ctype.c
data-convert-bt.c perf data: Fix signedness of value 2015-04-29 10:37:49 -03:00
data-convert-bt.h perf data: Support using -f to override perf.data file ownership for 'convert' 2015-04-02 13:18:52 -03:00
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 db-export: Fix thread ref-counting 2015-05-29 12:43:39 -03:00
db-export.h perf db-export: No need to have ->thread twice in struct export_sample 2015-04-02 13:18:43 -03:00
debug.c perf tools: Introduce veprintf 2015-08-06 15:30:38 -03:00
debug.h perf tools: Introduce veprintf 2015-08-06 15:30:38 -03:00
dso.c perf symbols: Fix dso lookup by long name and missing buildids 2015-11-13 11:14:36 -03:00
dso.h perf symbols: Fix dso lookup by long name and missing buildids 2015-11-13 11:14:36 -03:00
dwarf-aux.c perf probe: Fix to add missed brace around if block 2015-08-13 14:51:26 -03:00
dwarf-aux.h perf probe: Ignore tail calls to probed functions 2015-05-14 10:05:09 -03:00
env.c perf env: Introduce read_cpu_topology_map() method 2015-09-14 12:50:28 -03:00
env.h perf env: Introduce read_cpu_topology_map() method 2015-09-14 12:50:28 -03:00
environment.c perf report: Fix some option handling on --stdio 2015-05-14 10:05:22 -03:00
event.c perf tools: Make perf_event__synthesize_mmap_events() scale 2018-03-22 09:23:20 +01:00
event.h perf session: Warn when AUX data has been lost 2015-09-28 16:51:33 -03:00
evlist.c perf evlist: Reference count the cpu and thread maps at set_maps() 2016-05-04 14:48:52 -07:00
evlist.h perf tools: Export perf_event_attr__set_max_precise_ip() 2015-10-05 16:16:20 -03:00
evsel.c perf bpf: Attach eBPF filter to perf event 2015-10-29 17:16:22 -03:00
evsel.h perf bpf: Attach eBPF filter to perf event 2015-10-29 17:16:22 -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
header.c perf header: Set proper module name when build-id event found 2018-04-13 19:50:18 +02:00
header.h perf env: Move perf_env out of header.h and session.c into separate object 2015-09-14 12:50:19 -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 tools: Setup proper width for symbol_iaddr field 2015-10-05 16:33:41 -03:00
hist.h perf tools: Add support for sorting on the iaddr 2015-10-05 16:32:00 -03:00
intel-bts.c perf tools: Fix use of wrong event when processing exit events 2015-09-02 17:46:26 -03:00
intel-bts.h perf tools: Add Intel BTS support 2015-08-21 11:34:10 -03:00
intel-pt.c perf intel-pt: Fix snapshot overlap detection decoder errors 2016-10-28 03:01:27 -04:00
intel-pt.h perf tools: Pass Intel PT information for decoding MTC and CYC 2015-08-24 17:46:43 -03:00
intlist.c
intlist.h
kvm-stat.h perf kvm: Support using -f to override perf.data.guest file ownership 2015-04-02 13:18:47 -03:00
levenshtein.c
levenshtein.h
llvm-utils.c perf tools: Make fetch_kernel_version() publicly available 2015-11-06 15:57:18 -03:00
llvm-utils.h perf tests: Add LLVM test for eBPF on-the-fly compiling 2015-08-07 10:57:24 -03:00
lzma.c perf tools: Add lzma decompression support for kernel module 2015-03-21 14:53:40 -03:00
machine.c perf symbols: Fix dso lookup by long name and missing buildids 2015-11-13 11:14:36 -03:00
machine.h perf machine: Add method for common kernel_map(FUNCTION) operation 2015-09-30 18:34:29 -03:00
map.c perf tools: Insert split maps correctly into origin group 2015-11-05 11:39:38 -03:00
map.h perf maps: Introduce maps__find_symbol_by_name() 2015-09-30 18:34:25 -03:00
ordered-events.c perf inject: Copy events when reordering events in pipe mode 2018-03-22 09:23:26 +01:00
ordered-events.h perf ordered_samples: Remove references to perf_{evlist,tool} and machines 2015-03-31 17:52:32 -03:00
pager.c perf report: Fix some option handling on --stdio 2015-05-14 10:05:22 -03:00
parse-branch-options.c perf record: Add ability to sample call branches 2015-10-20 10:30:55 +02:00
parse-branch-options.h perf tools: Move branch option parsing to own file 2015-05-27 21:02:17 -03:00
parse-events.c perf tools: Only increase index if perf_evsel__new_idx() succeeds 2017-11-08 10:06:29 +01:00
parse-events.h perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-events.l perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-events.y perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-options.c perf tools: Search for more options when passing args to -h 2015-10-27 17:35:58 -03:00
parse-options.h perf tools: Introduce usage_with_options_msg() 2015-10-27 09:28:44 -03:00
parse-regs-options.c perf record: Add ability to name registers to record 2015-08-31 18:01:33 -03:00
parse-regs-options.h perf record: Add ability to name registers to record 2015-08-31 18:01:33 -03:00
path.c
perf_regs.c perf tools: Fix build break on powerpc due to sample_reg_masks 2015-09-30 18:34:27 -03:00
perf_regs.h perf tools: Fix build break on powerpc due to sample_reg_masks 2015-09-30 18:34:27 -03:00
PERF-VERSION-GEN perf tools: Fix version when building out of tree 2013-11-07 10:40:47 -03:00
pmu.c perf pmu: Fix misleadingly indented assignment (whitespace) 2017-07-15 11:57:49 +02:00
pmu.h perf tools: Add perf_pmu__format_bits() 2015-08-06 16:49:01 -03:00
pmu.l
pmu.y
probe-event.c perf probe: Add warning message if there is unexpected event name 2018-04-13 19:50:12 +02:00
probe-event.h perf probe: Export init/exit_probe_symbol_maps() 2015-09-15 09:48:32 -03:00
probe-file.c perf probe: Verify parameters in two functions 2015-11-11 18:41:32 -03:00
probe-file.h perf probe: Print deleted events in cmd_probe() 2015-09-04 12:43:44 -03:00
probe-finder.c perf probe: Fix to show correct locations for events on modules 2017-07-05 14:37:20 +02:00
probe-finder.h perf probe: Introduce probe_conf global configs 2015-05-08 16:26:26 -03:00
pstack.c perf tools: Introduce pstack_peek() 2015-05-05 18:13:22 -03:00
pstack.h perf tools: Introduce pstack_peek() 2015-05-05 18:13:22 -03:00
python-ext-sources perf stat: Move perf_counts struct and functions into separate object 2015-08-08 14:16:49 -03:00
python.c perf python: Support the PERF_RECORD_SWITCH event 2015-10-07 19:41:50 -03:00
quote.c
quote.h
rblist.c
rblist.h
record.c perf tools: Add a helper function to probe whether cpu-wide tracing is possible 2015-08-17 11:08:37 -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 perf session: Don't rely on evlist in pipe mode 2018-03-22 09:23:26 +01:00
session.h perf top: Register idle thread 2015-10-01 09:54:33 -03:00
setup.py perf tools: Fix python extension build 2016-04-12 09:08:35 -07:00
sigchain.c
sigchain.h
sort.c perf sort: Fix segfault with basic block 'cycles' sort dimension 2018-03-22 09:23:20 +01:00
sort.h perf tools: Introduce hpp_dimension__add_output function 2015-10-06 18:04:59 -03:00
srcline.c perf tools: Always use non inlined file name for 'srcfile' sort key 2015-09-02 16:30:46 -03:00
stat-shadow.c perf stat: Move sw clock metrics printout to stat-shadow 2015-11-04 15:11:41 -03:00
stat.c perf stat: Fix interval output values 2016-10-31 04:13:59 -06:00
stat.h perf stat: Add AGGR_UNSET mode 2015-10-19 18:02:07 -03:00
strbuf.c perf tools: Introduce usage_with_options_msg() 2015-10-27 09:28:44 -03:00
strbuf.h perf tools: Introduce usage_with_options_msg() 2015-10-27 09:28:44 -03:00
strfilter.c tools strfilter: Use __fallthrough 2017-07-15 11:57:47 +02:00
strfilter.h perf tools: Add strfilter__string to recover rules string 2015-05-04 12:43:54 -03:00
string.c tools string: Use __fallthrough in perf_atoll() 2017-07-15 11:57:47 +02:00
strlist.c perf strlist: Make parse_list() private 2015-07-20 14:51:07 -03:00
strlist.h perf strlist: Make parse_list() private 2015-07-20 14:51:07 -03:00
svghelper.c perf tools: Add reference counting for cpu_map object 2015-06-25 15:15:50 -03:00
svghelper.h perf timechart: Implement IO mode 2014-07-10 00:22:54 +02:00
symbol-elf.c perf symbols: Robustify reading of build-id from sysfs 2017-08-06 19:19:46 -07:00
symbol-minimal.c perf symbols: Fix type error when reading a build-id 2015-10-28 10:02:00 -03:00
symbol.c perf symbols: Fix symbols__fixup_end heuristic for corner cases 2017-12-20 10:04:56 +01:00
symbol.h perf symbols: Allow forcing reading of non-root owned files by root 2015-11-12 18:58:18 -03:00
target.c perf target: Simplify handling of strerror_r return 2015-03-24 12:08:30 -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: Use readdir() instead of deprecated readdir_r() 2017-07-15 11:57:48 +02:00
thread_map.h perf thrad_map: Add comm string into array 2015-06-26 11:07:01 -03:00
thread-stack.c perf tools: Ensure thread-stack is flushed 2015-06-19 16:03:33 -03:00
thread-stack.h perf tools: Ensure thread-stack is flushed 2015-06-19 16:03:33 -03:00
thread.c perf tools: Remove duplicate const qualifier 2017-07-15 11:57:48 +02:00
thread.h perf tools: Elliminate alignment holes 2015-05-18 10:17:33 -03:00
tool.h perf tools: Add new PERF_RECORD_SWITCH event 2015-07-23 22:51:13 -03:00
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 tools lib api fs: Move tracing_path interface into api/fs/tracing_path.c 2015-09-04 12:00:45 -03:00
trace-event-parse.c perf tools: Stop reading the kallsyms data from perf.data 2015-07-23 22:51:11 -03:00
trace-event-read.c perf tools: Stop reading the kallsyms data from perf.data 2015-07-23 22:51:11 -03:00
trace-event-scripting.c perf scripting: Avoid leaking the scripting_context variable 2017-01-26 08:23:47 +01:00
trace-event.c perf evsel: Propagate error info from tp_format 2015-09-15 09:48:33 -03:00
trace-event.h perf scripting python: Allow for max_stack greater than PERF_MAX_STACK_DEPTH 2015-09-28 17:09:12 -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 report: Ensure the perf DSO mapping matches what libdw sees 2018-04-13 19:50:18 +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 unwind: Pass symbol source to libunwind 2015-10-29 17:48:38 -03:00
unwind.h perf callchains: Use thread->mg->machine 2014-10-29 10:32:46 -02:00
usage.c perf test: Suppress libtraceevent warnings 2015-10-19 14:58:10 -03:00
util.c perf tools: Make fetch_kernel_version() publicly available 2015-11-06 15:57:18 -03:00
util.h perf bpf: Improve BPF related error messages 2015-11-06 17:14:20 -03:00
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: Fix lockup using 32-bit compat vdso 2015-07-07 11:05:08 -03:00
vdso.h perf machine: Fix up vdso methods names 2015-05-29 12:43:44 -03:00
wrapper.c
xyarray.c perf tools: Introduce xyarray__reset function 2015-06-16 10:34:39 -03:00
xyarray.h perf tools: Introduce xyarray__reset function 2015-06-16 10:34:39 -03:00
zlib.c perf tools: Add gzip decompression support for kernel module 2014-11-05 10:11:26 -03:00