unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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kernel-hacking-2024-linux-s.../tools/perf
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Thomas Richter 0879e5e5f3 perf test shell: Fix test case probe libc's inet_pton on s390x 
The 'perf test' case "probe libc's inet_pton & backtrace it with ping"
fails on s390x. The reason is the 'realpath /lib64/ld*.so.* | uniq' line
which returns 2 libraries:

        root@s35lp76 shell]# realpath /lib64/ld*.so.* | uniq
        /usr/lib64/ld-2.26.so
        /usr/lib64/ld_pre_smc.so.1.0.1
        [root@s35lp76 shell]

This output makes the "perf probe" command lines invalid.

Use ldd tool to find out the libraries required by "bash" and check if
symbol "inet_pton" is part of the "libc" library.  Some distros do not
have a /lib64 directory.

I have also added a check for the existence of an IPv6 network interface
before it is being used.

Committer changes:

We can't really use ldd for libc, as in some systems, such as x86_64, it
has hardlinks and then ldd sees one and the kernel the other, so grep
for libc in /proc/self/maps to get the one we'll receive from
PERF_RECORD_MMAP.

Thomas checked this change and acked it.

Signed-off-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Suggested-by: Hendrik Brückner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brückner <brueckner@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20171114133409.GN8836@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-11-16 14:50:00 -03:00
..
arch Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
bench License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Documentation perf top: Document missing options 2017-11-16 14:49:56 -03:00
jvmti License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmu-events perf vendor events powerpc: Update POWER9 events 2017-11-16 14:49:54 -03:00
python License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scripts License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tests perf test shell: Fix test case probe libc's inet_pton on s390x 2017-11-16 14:50:00 -03:00
trace Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
ui perf annotate browser: Add disasm_line__write function 2017-11-16 14:49:49 -03:00
util perf annotate: Do not truncate instruction names at 6 chars 2017-11-16 14:50:00 -03:00
.gitignore perf tools: Ignore generated files pmu-events/{jevents,pmu-events.c} for git 2017-03-13 10:59:36 -03:00
Build perf trace: Only build tools/perf/trace/beauty/ when building 'perf trace' 2017-07-18 23:13:52 -03:00
builtin-annotate.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-bench.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
builtin-buildid-cache.c perf buildid-cache: Update help text for purge command 2017-11-16 14:49:54 -03:00
builtin-buildid-list.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-c2c.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-config.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-data.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
builtin-diff.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-evlist.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-ftrace.c tools include: Adopt strstarts() from the kernel 2017-07-20 15:46:10 -03:00
builtin-help.c perf help: Fix a bug during strstart() conversion 2017-11-16 14:49:59 -03:00
builtin-inject.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-kallsyms.c perf tools: Including missing inttypes.h header 2017-04-19 13:01:46 -03:00
builtin-kmem.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-kvm.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-list.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-lock.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-mem.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-probe.c perf buildid-cache: Support binary objects from other namespaces 2017-07-18 23:14:11 -03:00
builtin-record.c perf record: Generate PERF_RECORD_{MMAP,COMM,EXEC} with --delay 2017-11-13 09:39:57 -03:00
builtin-report.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-sched.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
builtin-script.c perf script: Allow printing period for non freq mode groups 2017-11-16 14:49:55 -03:00
builtin-stat.c perf stat: Move the shadow stats scale computation in perf_stat__update_shadow_stats 2017-10-30 13:40:33 -03:00
builtin-timechart.c perf tools: Add struct perf_data_file 2017-10-30 13:37:37 -03:00
builtin-top.c perf top: Remove a duplicate word 2017-11-16 14:49:56 -03:00
builtin-trace.c perf trace: Fix an exit code of trace__symbols_init 2017-11-16 14:49:52 -03:00
builtin-version.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
builtin.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
check-headers.sh Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
command-list.txt perf tools: Missing c2c command in command-list 2017-03-13 10:59:31 -03:00
CREDITS
design.txt
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile.config perf tools: Use shell function for perl cflags retrieval 2017-11-16 14:49:52 -03:00
Makefile.perf perf trace beauty kcmp: Beautify arguments 2017-10-31 16:17:04 -03:00
MANIFEST perf tools: Get all of tools/{arch,include}/ in the MANIFEST 2017-09-25 10:39:43 -03:00
perf-archive.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-completion.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-read-vdso.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-sys.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-with-kcore.sh
perf.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf.h Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00