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Message-ID: <4c9a1e2d-2515-4f38-a316-960dee100fbd@linaro.org> Date: Mon, 15 Jul 2024 10:35:43 +0100 From: James Clark <james.clark@...aro.org> To: Chaitanya S Prakash <ChaitanyaS.Prakash@....com>, linux-perf-users@...r.kernel.org, Arnaldo Carvalho de Melo <acme@...nel.org>, Ian Rogers <irogers@...gle.com>, Namhyung Kim <namhyung@...nel.org> Cc: anshuman.khandual@....com, Josh Poimboeuf <jpoimboe@...nel.org>, Suzuki K Poulose <suzuki.poulose@....com>, Mike Leach <mike.leach@...aro.org>, John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>, Leo Yan <leo.yan@...aro.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, Chenyuan Mi <cymi20@...an.edu.cn>, Masami Hiramatsu <mhiramat@...nel.org>, Ravi Bangoria <ravi.bangoria@....com>, Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz>, Colin Ian King <colin.i.king@...il.com>, Changbin Du <changbin.du@...wei.com>, Kan Liang <kan.liang@...ux.intel.com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, Tiezhu Yang <yangtiezhu@...ngson.cn>, Alexey Dobriyan <adobriyan@...il.com>, Georg Müller <georgmueller@....net>, Liam Howlett <liam.howlett@...cle.com>, bpf@...r.kernel.org, coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com> Subject: Re: [PATCH V3 00/10] perf tools: Fix test "perf probe of function from different CU" On 15/07/2024 10:34 am, James Clark wrote: > > > On 10/07/2024 8:39 am, Chaitanya S Prakash wrote: >> Gentle ping, are there any updates on the string clean up patch set? >> >> On 6/1/24 18:29, Chaitanya S Prakash wrote: >>> From: Chaitanya S Prakash <chaitanyas.prakash@....com> >>> >>> Perf treated all files beginning with "/tmp/perf-" as a map file despite >>> them always ending in ".map", this caused the test "perf probe of >>> function from different CU" to fail when Perf was built with NO_DWARF=1. >>> As the file was parsed as a map file, the probe...--funcs command output >>> garbage values instead of listing the functions in the binary. After >>> fixing the issue an additional check to test the output of the >>> probe...--funcs command has been added. >>> >>> Additionally, various functions within the codebase have been refactored >>> and restructured. The definition of str_has_suffix() has been adopted >>> from tools/bpf/bpftool/gen.c and added to tools/lib/string.c in an >>> attempt to make the function more generic. The implementation has been >>> retained but the return values have been modified to resemble that of >>> str_has_prefix(), i.e., return strlen(suffix) on success and 0 on >>> failure. In light of the new addition, "ends_with()", a locally defined >>> function used for checking if a string had a given suffix has been >>> deleted and str_has_suffix() has replaced its usage. A call to >>> strtailcmp() has also been replaced as str_has_suffix() seemed more >>> suited for that particular use case. >>> >>> Finally str_has_prefix() is adopted from the kernel and is added to >>> tools/lib/string.c, following which strstarts() is deleted and its use >>> has been replaced with str_has_prefix(). >>> >>> This patch series has been tested on 6.10-rc1 mainline kernel, both on >>> arm64 and x86 platforms. >>> >>> Changes in V3: >>> >>> - Patch adding configs required by "perf probe of function from >>> different >>> CU" was originally part of the series but has been merged in >>> 6.10-rc1. >>> https://github.com/torvalds/linux/commit/6b718ac6874c2233b8dec369a8a377d6c5b638e6 >>> >>> - Restructure patches according to the maintainer trees. >>> - Add explanation for why '| grep "foo"' is used. >>> - Fix build errors for when perf is built with LLVM=1. >>> >>> Changes in V2: >>> https://lore.kernel.org/all/20240408062230.1949882-1-ChaitanyaS.Prakash@arm.com/ >>> >>> - Add str_has_suffix() and str_has_prefix() to tools/lib/string.c >>> - Delete ends_with() and replace its usage with str_has_suffix() >>> - Replace an instance of strtailcmp() with str_has_suffix() >>> - Delete strstarts() from tools/include/linux/string.h and replace its >>> usage with str_has_prefix() >>> >>> Changes in V1: >>> https://lore.kernel.org/all/20240220042957.2022391-1-ChaitanyaS.Prakash@arm.com/ >>> >>> Cc: Josh Poimboeuf <jpoimboe@...nel.org> >>> Cc: Peter Zijlstra <peterz@...radead.org> >>> Cc: Suzuki K Poulose <suzuki.poulose@....com> >>> Cc: Mike Leach <mike.leach@...aro.org> >>> Cc: James Clark <james.clark@....com> >>> Cc: John Garry <john.g.garry@...cle.com> >>> Cc: Will Deacon <will@...nel.org> >>> Cc: Leo Yan <leo.yan@...aro.org> >>> Cc: Ingo Molnar <mingo@...hat.com> >>> Cc: Arnaldo Carvalho de Melo <acme@...nel.org> >>> Cc: Namhyung Kim <namhyung@...nel.org> >>> Cc: Mark Rutland <mark.rutland@....com> >>> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com> >>> Cc: Jiri Olsa <jolsa@...nel.org> >>> Cc: Ian Rogers <irogers@...gle.com> >>> Cc: Adrian Hunter <adrian.hunter@...el.com> >>> Cc: Chenyuan Mi <cymi20@...an.edu.cn> >>> Cc: Masami Hiramatsu <mhiramat@...nel.org> >>> Cc: Ravi Bangoria <ravi.bangoria@....com> >>> Cc: Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz> >>> Cc: Colin Ian King <colin.i.king@...il.com> >>> Cc: Changbin Du <changbin.du@...wei.com> >>> Cc: Kan Liang <kan.liang@...ux.intel.com> >>> Cc: Athira Rajeev <atrajeev@...ux.vnet.ibm.com> >>> Cc: Tiezhu Yang <yangtiezhu@...ngson.cn> >>> Cc: Alexey Dobriyan <adobriyan@...il.com> >>> Cc: Georg Müller <georgmueller@....net> >>> Cc: Liam Howlett <liam.howlett@...cle.com> >>> Cc: bpf@...r.kernel.org >>> Cc: coresight@...ts.linaro.org >>> Cc: linux-arm-kernel@...ts.infradead.org >>> Cc: linux-kernel@...r.kernel.org >>> Cc: linux-perf-users@...r.kernel.org >>> >>> Chaitanya S Prakash (10): >>> tools lib: adopt str_has_suffix() from bpftool/gen.c > > LGTM, > > Reviewed-by: James Clark <james.clark@....com> > > The below commit looked like it could be prone to an off by one error > but I debugged it to confirm that it's ok: > >>> perf util: Delete ends_with() and replace its use with >>> str_has_suffix() > There were some trivial merge conflicts though, so I'm not sure if it's worth sending a new version out or not. >>> perf util: Replace an instance of strtailcmp() by str_has_suffix() >>> tools lib: Adopt str_has_prefix() from kernel >>> libsubcmd: Replace strstarts() usage with str_has_prefix() >>> objtool: Replace strstarts() usage with str_has_prefix() >>> perf tools: Replace strstarts() usage with str_has_prefix() >>> tools lib: Remove strstarts() as all its usecases have been replaced >>> by str_has_prefix() >>> perf tools: Only treat files as map files when they have the >>> extension >>> .map >>> perf test: Check output of the probe ... --funcs command >>> >>> tools/include/linux/string.h | 12 ++--- >>> tools/lib/string.c | 48 +++++++++++++++++++ >>> tools/lib/subcmd/help.c | 2 +- >>> tools/lib/subcmd/parse-options.c | 18 +++---- >>> tools/objtool/check.c | 2 +- >>> tools/perf/arch/arm/util/pmu.c | 4 +- >>> tools/perf/arch/x86/annotate/instructions.c | 14 +++--- >>> tools/perf/arch/x86/util/env.c | 2 +- >>> tools/perf/builtin-c2c.c | 4 +- >>> tools/perf/builtin-config.c | 2 +- >>> tools/perf/builtin-daemon.c | 2 +- >>> tools/perf/builtin-ftrace.c | 2 +- >>> tools/perf/builtin-help.c | 6 +-- >>> tools/perf/builtin-kmem.c | 2 +- >>> tools/perf/builtin-kvm.c | 14 +++--- >>> tools/perf/builtin-kwork.c | 10 ++-- >>> tools/perf/builtin-lock.c | 6 +-- >>> tools/perf/builtin-mem.c | 4 +- >>> tools/perf/builtin-sched.c | 6 +-- >>> tools/perf/builtin-script.c | 30 ++++-------- >>> tools/perf/builtin-stat.c | 4 +- >>> tools/perf/builtin-timechart.c | 2 +- >>> tools/perf/builtin-trace.c | 6 +-- >>> tools/perf/perf.c | 12 ++--- >>> .../shell/test_uprobe_from_different_cu.sh | 2 +- >>> tools/perf/tests/symbols.c | 2 +- >>> tools/perf/ui/browser.c | 2 +- >>> tools/perf/ui/browsers/scripts.c | 2 +- >>> tools/perf/ui/stdio/hist.c | 2 +- >>> tools/perf/util/amd-sample-raw.c | 4 +- >>> tools/perf/util/annotate.c | 2 +- >>> tools/perf/util/callchain.c | 2 +- >>> tools/perf/util/config.c | 12 ++--- >>> tools/perf/util/map.c | 8 ++-- >>> tools/perf/util/pmus.c | 2 +- >>> tools/perf/util/probe-event.c | 2 +- >>> tools/perf/util/sample-raw.c | 2 +- >>> tools/perf/util/symbol-elf.c | 4 +- >>> tools/perf/util/symbol.c | 3 +- >>> 39 files changed, 148 insertions(+), 117 deletions(-) >>> >>
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