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The evsel->unit borrows a pointer of pmu event or alias instead of
owns a string. But tool event (duration_time) passes a result of
strdup() caused a leak.
It was found by ASAN during metric test:
Direct leak of 210 byte(s) in 70 object(s) allocated from:
#0 0x7fe366fca0b5 in strdup (/lib/x86_64-linux-gnu/libasan.so.5+0x920b5)
#1 0x559fbbcc6ea3 in add_event_tool util/parse-events.c:414
#2 0x559fbbcc6ea3 in parse_events_add_tool util/parse-events.c:1414
#3 0x559fbbd8474d in parse_events_parse util/parse-events.y:439
#4 0x559fbbcc95da in parse_events__scanner util/parse-events.c:2096
#5 0x559fbbcc95da in __parse_events util/parse-events.c:2141
#6 0x559fbbc28555 in check_parse_id tests/pmu-events.c:406
#7 0x559fbbc28555 in check_parse_id tests/pmu-events.c:393
#8 0x559fbbc28555 in check_parse_cpu tests/pmu-events.c:415
#9 0x559fbbc28555 in test_parsing tests/pmu-events.c:498
#10 0x559fbbc0109b in run_test tests/builtin-test.c:410
#11 0x559fbbc0109b in test_and_print tests/builtin-test.c:440
#12 0x559fbbc03e69 in __cmd_test tests/builtin-test.c:695
#13 0x559fbbc03e69 in cmd_test tests/builtin-test.c:807
#14 0x559fbbc691f4 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
#15 0x559fbbb071a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
#16 0x559fbbb071a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
#17 0x559fbbb071a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
#18 0x7fe366b68cc9 in __libc_start_main ../csu/libc-start.c:308
Fixes: f0fbb114e3 ("perf stat: Implement duration_time as a proper event")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The aliases were never released causing the following leaks:
Indirect leak of 1224 byte(s) in 9 object(s) allocated from:
#0 0x7feefb830628 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x107628)
#1 0x56332c8f1b62 in __perf_pmu__new_alias util/pmu.c:322
#2 0x56332c8f401f in pmu_add_cpu_aliases_map util/pmu.c:778
#3 0x56332c792ce9 in __test__pmu_event_aliases tests/pmu-events.c:295
#4 0x56332c792ce9 in test_aliases tests/pmu-events.c:367
#5 0x56332c76a09b in run_test tests/builtin-test.c:410
#6 0x56332c76a09b in test_and_print tests/builtin-test.c:440
#7 0x56332c76ce69 in __cmd_test tests/builtin-test.c:695
#8 0x56332c76ce69 in cmd_test tests/builtin-test.c:807
#9 0x56332c7d2214 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
#10 0x56332c6701a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
#11 0x56332c6701a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
#12 0x56332c6701a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
#13 0x7feefb359cc9 in __libc_start_main ../csu/libc-start.c:308
Fixes: 956a78356c ("perf test: Test pmu-events aliases")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: John Garry <john.garry@huawei.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-11-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
If events in a group explicitly set a frequency or period with leader
sampling, don't disable the samples on those events.
Prior to 5.8:
perf record -e '{cycles/period=12345000/,instructions/period=6789000/}:S'
would clear the attributes then apply the config terms. In commit
5f34278867 leader sampling configuration was moved to after applying the
config terms, in the example, making the instructions' event have its period
cleared.
This change makes it so that sampling is only disabled if configuration
terms aren't present.
Committer testing:
Before:
# perf record -e '{cycles/period=1/,instructions/period=2/}:S' sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.051 MB perf.data (6 samples) ]
#
# perf evlist -v
cycles/period=1/: size: 120, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, disabled: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
instructions/period=2/: size: 120, config: 0x1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, sample_id_all: 1, exclude_guest: 1
#
After:
# perf record -e '{cycles/period=1/,instructions/period=2/}:S' sleep 0.0001
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.052 MB perf.data (4 samples) ]
# perf evlist -v
cycles/period=1/: size: 120, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, disabled: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
instructions/period=2/: size: 120, config: 0x1, { sample_period, sample_freq }: 2, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, sample_id_all: 1, exclude_guest: 1
#
Fixes: 5f34278867 ("perf evlist: Move leader-sampling configuration")
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lore.kernel.org/lkml/20200912025655.1337192-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When compiling with DEBUG=1 on Fedora 32 I'm getting crash for 'perf
test signal':
Program received signal SIGSEGV, Segmentation fault.
0x0000000000c68548 in __test_function ()
(gdb) bt
#0 0x0000000000c68548 in __test_function ()
#1 0x00000000004d62e9 in test_function () at tests/bp_signal.c:61
#2 0x00000000004d689a in test__bp_signal (test=0xa8e280 <generic_ ...
#3 0x00000000004b7d49 in run_test (test=0xa8e280 <generic_tests+1 ...
#4 0x00000000004b7e7f in test_and_print (t=0xa8e280 <generic_test ...
#5 0x00000000004b8927 in __cmd_test (argc=1, argv=0x7fffffffdce0, ...
...
It's caused by the symbol __test_function being in the ".bss" section:
$ readelf -a ./perf | less
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
...
[28] .bss NOBITS 0000000000c356a0 008346a0
00000000000511f8 0000000000000000 WA 0 0 32
$ nm perf | grep __test_function
0000000000c68548 B __test_function
I guess most of the time we're just lucky the inline asm ended up in the
".text" section, so making it specific explicit with push and pop
section clauses.
$ readelf -a ./perf | less
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
...
[13] .text PROGBITS 0000000000431240 00031240
0000000000306faa 0000000000000000 AX 0 0 16
$ nm perf | grep __test_function
00000000004d62c8 T __test_function
Committer testing:
$ readelf -wi ~/bin/perf | grep producer -m1
<c> DW_AT_producer : (indirect string, offset: 0x254a): GNU C99 10.2.1 20200723 (Red Hat 10.2.1-1) -mtune=generic -march=x86-64 -ggdb3 -std=gnu99 -fno-omit-frame-pointer -funwind-tables -fstack-protector-all
^^^^^
^^^^^
^^^^^
$
Before:
$ perf test signal
20: Breakpoint overflow signal handler : FAILED!
$
After:
$ perf test signal
20: Breakpoint overflow signal handler : Ok
$
Fixes: 8fd34e1cce ("perf test: Improve bp_signal")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lore.kernel.org/lkml/20200911130005.1842138-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
We need a simple method to test Perf with ARM CoreSight drivers, this
could be used for smoke testing when new patch is coming for perf or
CoreSight drivers, and we also can use the test to confirm if the
CoreSight has been enabled successfully on new platforms.
This patch introduces the shell script test_arm_coresight.sh which is
under the 'pert test' framework. This script provides three testing
scenarios:
Test scenario 1: traverse all possible paths between source and sink
For traversing possible paths, simply to say, the testing rationale is
source oriented testing, it traverses every source (now only refers to
ETM device) and test its all possible sinks. To search the complete
paths from one specific source to its sinks, this patch relies on the
sysfs '/sys/bus/coresight/devices/devX/out:Y' for depth-first search
(DFS) for iteration connected device nodes, if the output device is
detected as a sink device (the script will exclude TPIU device which can
not be supported for perf PMU), then it will test trace data recording
and decoding for it.
The script runs three output testings for every trace data:
- Test branch samples dumping with 'perf script' command;
- Test branch samples reporting with 'perf report' command;
- Use option '--itrace=i1000i' to insert synthesized instructions events
and the script will check if perf can output the percentage value
successfully based on the instruction samples.
Test scenario 2: system-wide test
For system-wide testing, it passes option '-a' to perf tool to enable
tracing on all CPUs, so it's hard to say which program will be traced.
But perf tool itself contributes much overload in this case, so it will
parse trace data and check if process 'perf' can be detected or not.
Test scenario 3: snapshot mode test.
For snapshot mode testing, it uses 'dd' command to launch a long running
program, so this can give chance to send signal -USR2; it will check the
captured trace data contains 'dd' related thread info or not.
If any test fails, it will report failure and directly exit with error.
This test will be only applied on a platform with PMU event 'cs_etm//',
otherwise will skip the testing.
Below is detailed usage for it:
# cd $linux/tools/perf -> This is important so can use shell script
# perf test list
[...]
70: probe libc's inet_pton & backtrace it with ping
71: Check Arm CoreSight trace data recording and synthesized samples
72: Check open filename arg using perf trace + vfs_getname
73: Zstd perf.data compression/decompression
74: Add vfs_getname probe to get syscall args filenames
75: Use vfs_getname probe to get syscall args filenames
# perf test 71
71: Check Arm CoreSight trace data recording and branch samples: Ok
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200907130154.9601-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Switch from deprecated bpf_program__title() API to
bpf_program__section_name(). Also drop unnecessary error checks because
neither bpf_program__title() nor bpf_program__section_name() can fail or
return NULL.
Fixes: 5210958420 ("libbpf: Deprecate notion of BPF program "title" in favor of "section name"")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/bpf/20200908180127.1249-1-andriin@fb.com
We got slightly different patches removing a double word
in a comment in net/ipv4/raw.c - picked the version from net.
Simple conflict in drivers/net/ethernet/ibm/ibmvnic.c. Use cached
values instead of VNIC login response buffer (following what
commit 507ebe6444 ("ibmvnic: Fix use-after-free of VNIC login
response buffer") did).
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This is bitrotting, nobody is stepping up to work on it, and since we
treat warnings as errors, feature detection is failing in its main,
faster test (tools/build/feature/test-all.c) because of the GTK+2
infobar check.
So make this opt-in, at some point ditch this if nobody volunteers to
take care of this.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When we use the 'intel' disassembler style we get 'ret' instead of
'retq', so add that as an alias.
# perf annotate --disassembler-style=intel --stdio2 acpi_processor_ffh_cstate_enter > before
Apply this patch and then:
# perf annotate --disassembler-style=intel --stdio2 acpi_processor_ffh_cstate_enter > after
# diff -u before after
--- before 2020-09-04 14:10:47.768414634 -0300
+++ after 2020-09-04 14:10:59.116681039 -0300
@@ -33,7 +33,7 @@
test al,0x8
↓ je 97
and DWORD PTR gs:[rip+0x7e548509],0x7fffffff
- 97: ret
+ 97: ← ret
mov rax,QWORD PTR gs:0x17bc0
lock or BYTE PTR [rax+0x2],0x20
mov rax,QWORD PTR [rax]
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Matt P. Dziubinski <matdzb@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add 'snapshot' control command to create an AUX area tracing snapshot
the same as if sending SIGUSR2. The advantage of the FIFO is that access
is governed by access to the FIFO.
Example:
$ mkfifo perf.control
$ mkfifo perf.ack
$ cat perf.ack &
[1] 15235
$ sudo ~/bin/perf record --control fifo:perf.control,perf.ack -S -e intel_pt//u -- sleep 60 &
[2] 15243
$ ps -e | grep perf
15244 pts/1 00:00:00 perf
$ kill -USR2 15244
bash: kill: (15244) - Operation not permitted
$ echo snapshot > perf.control
ack
$
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20200901093758.32293-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wine generates PE binaries for its code modules and also generates debug
files in PE or PDB formats, which perf cannot parse either.
Trying to read symbols on non-ELF binaries with libbfd, when supported,
makes it possible for perf to report symbols and annotations for Windows
applications running under Wine.
Because libbfd doesn't provide symbol size (probably because of some
backends not supporting it), we compute it by first sorting the symbols
by addresses and then considering that they are sequential in a given
section.
v3: Also include local and weak bfd symbols and mark them as such, only
global symbols were previously reported, and that caused a very
imprecise address to symbol resolution.
Signed-off-by: Remi Bernon <rbernon@codeweavers.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jacek Caban <jacek@codeweavers.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200821165238.1340315-2-rbernon@codeweavers.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
