Ian Rogers
da885a0e5e
perf cpumap: Add reference count checking
...
Enabled when REFCNT_CHECKING is defined. The change adds a memory
allocated pointer that is interposed between the reference counted cpu
map at a get and freed by a put. The pointer replaces the original
perf_cpu_map struct, so use of the perf_cpu_map via APIs remains
unchanged. Any use of the cpu map without the API requires two versions,
handled via the RC_CHK_ACCESS macro.
This change is intended to catch:
- use after put: using a cpumap after you have put it will cause a
segv.
- unbalanced puts: two puts for a get will result in a double free
that can be captured and reported by tools like address sanitizer,
including with the associated stack traces of allocation and frees.
- missing puts: if a put is missing then the get turns into a memory
leak that can be reported by leak sanitizer, including the stack
trace at the point the get occurs.
Cc: Adrian Hunter <adrian.hunter@intel.com >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com >
Cc: Andi Kleen <ak@linux.intel.com >
Cc: Andrew Morton <akpm@linux-foundation.org >
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
Cc: Darren Hart <dvhart@infradead.org >
Cc: Davidlohr Bueso <dave@stgolabs.net >
Cc: Dmitriy Vyukov <dvyukov@google.com >
Cc: Eric Dumazet <edumazet@google.com >
Cc: German Gomez <german.gomez@arm.com >
Cc: Hao Luo <haoluo@google.com >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: James Clark <james.clark@arm.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: John Garry <john.g.garry@oracle.com >
Cc: Kajol Jain <kjain@linux.ibm.com >
Cc: Kan Liang <kan.liang@linux.intel.com >
Cc: Leo Yan <leo.yan@linaro.org >
Cc: Madhavan Srinivasan <maddy@linux.ibm.com >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Masami Hiramatsu <mhiramat@kernel.org >
Cc: Miaoqian Lin <linmq006@gmail.com >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Riccardo Mancini <rickyman7@gmail.com >
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com >
Cc: Song Liu <song@kernel.org >
Cc: Stephen Brennan <stephen.s.brennan@oracle.com >
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: Thomas Richter <tmricht@linux.ibm.com >,
Cc: Yury Norov <yury.norov@gmail.com >
Link: https://lore.kernel.org/lkml/20230407230405.2931830-3-irogers@google.com
[ Extracted from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2023-04-17 16:50:02 -03:00
Alexander Gordeev
4ff17c448a
libperf: Fix install_pkgconfig target
...
Commit 47e02b94a4agordeev@linux.ibm.com >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Ian Rogers <irogers@google.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Josh Poimboeuf <jpoimboe@kernel.org >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Masahiro Yamada <masahiroy@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Nathan Chancellor <nathan@kernel.org >
Cc: Nick Desaulniers <ndesaulniers@google.com >
Cc: Nicolas Schier <nicolas@fjasle.eu >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Stephane Eranian <eranian@google.com >
Cc: Tom Rix <trix@redhat.com >
Cc: bpf@vger.kernel.org
Cc: llvm@lists.linux.dev
Link: http://lore.kernel.org/lkml/Y5w/cWKyb8vpNMfA@li-4a3a4a4c-28e5-11b2-a85c-a8d192c6f089.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2022-12-16 10:04:06 -03:00
Ian Rogers
47e02b94a4
tools lib perf: Add dependency test to install_headers
...
Compute the headers to be installed from their source headers and make
each have its own build target to install it. Using dependencies
avoids headers being reinstalled and getting a new timestamp which
then causes files that depend on the header to be rebuilt.
Signed-off-by: Ian Rogers <irogers@google.com >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Josh Poimboeuf <jpoimboe@kernel.org >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Masahiro Yamada <masahiroy@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Nathan Chancellor <nathan@kernel.org >
Cc: Nick Desaulniers <ndesaulniers@google.com >
Cc: Nicolas Schier <nicolas@fjasle.eu >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Stephane Eranian <eranian@google.com >
Cc: Tom Rix <trix@redhat.com >
Cc: bpf@vger.kernel.org
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20221202045743.2639466-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2022-12-14 11:16:12 -03:00
Ian Rogers
e8951bfb4c
tools lib perf: Make install_headers clearer
...
Add libperf to the name so that this install_headers build appears
different to similar targets in different libraries.
Signed-off-by: Ian Rogers <irogers@google.com >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Alexei Starovoitov <ast@kernel.org >
Cc: Andrii Nakryiko <andrii@kernel.org >
Cc: Daniel Borkmann <daniel@iogearbox.net >
Cc: Hao Luo <haoluo@google.com >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: John Fastabend <john.fastabend@gmail.com >
Cc: KP Singh <kpsingh@kernel.org >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Martin KaFai Lau <martin.lau@linux.dev >
Cc: Masahiro Yamada <masahiroy@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Nicolas Schier <nicolas@fjasle.eu >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Song Liu <song@kernel.org >
Cc: Stanislav Fomichev <sdf@google.com >
Cc: Stephane Eranian <eranian@google.com >
Cc: Yonghong Song <yhs@fb.com >
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221117004356.279422-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2022-11-20 11:32:23 -03:00
Ian Rogers
a6e8caf5db
tools lib perf: Add missing install headers
...
Headers necessary for the perf build. Note, internal headers are also
installed as these are necessary for the build.
Signed-off-by: Ian Rogers <irogers@google.com >
Acked-by: Namhyung Kim <namhyung@kernel.org >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Masahiro Yamada <masahiroy@kernel.org >
Cc: Nick Desaulniers <ndesaulniers@google.com >
Cc: Nicolas Schier <nicolas@fjasle.eu >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Stephane Eranian <eranian@google.com >
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20221109184914.1357295-9-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2022-11-16 12:17:15 -03:00
Masahiro Yamada
5c8166419a
kbuild: replace $(if A,A,B) with $(or A,B)
...
$(or ...) is available since GNU Make 3.81, and useful to shorten the
code in some places.
Covert as follows:
$(if A,A,B) --> $(or A,B)
This patch also converts:
$(if A, A, B) --> $(or A, B)
Strictly speaking, the latter is not an equivalent conversion because
GNU Make keeps spaces after commas; if A is not empty, $(if A, A, B)
expands to " A", while $(or A, B) expands to "A".
Anyway, preceding spaces are not significant in the code hunks I touched.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org >
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu >
2022-02-15 12:25:56 +09:00
Jiri Olsa
3d970601da
libperf: Change tests to single static and shared binaries
...
Make tests to be two binaries 'tests_static' and 'tests_shared', so the
maintenance is easier.
Adding tests under libperf build system, so we define all the flags just
once.
Adding make-tests tule to just compile tests without running them.
Signed-off-by: Jiri Olsa <jolsa@kernel.org >
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com >
Cc: Ian Rogers <irogers@google.com >
Cc: Mark Rutland <mark.rutland@arm.com >
Cc: Michael Petlan <mpetlan@redhat.com >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com >
Link: http://lore.kernel.org/lkml/20210706151704.73662-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2021-07-07 11:41:58 -03:00
Jiri Olsa
81de3bf37a
libperf: Add man pages
...
Change the man page generation to asciidoc, because it's easier to use
and has been more commonly used in related projects. Remove the current
rst pages.
Add 3 man pages to have a base for more additions:
libperf.3 - overall description
libperf-counting.7 - counting basics explained on simple example
libperf-sampling.7 - sampling basics explained on simple example
The plan is to add more man pages to cover the basic API.
The build generates html and man pages:
$ cd tools/lib/perf/Documentation
$ make
ASCIIDOC libperf.xml
XMLTO libperf.3
ASCIIDOC libperf-counting.xml
XMLTO libperf-counting.7
ASCIIDOC libperf-sampling.xml
XMLTO libperf-sampling.7
ASCIIDOC libperf.html
ASCIIDOC libperf-counting.html
ASCIIDOC libperf-sampling.html
Add the following install targets:
install-man - man pages
install-html - html version of man pages
install-examples - examples mentioned in the man pages
Signed-off-by: Jiri Olsa <jolsa@kernel.org >
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 >
Link: http://lore.kernel.org/lkml/20191206210612.8676-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2020-01-06 11:46:09 -03:00
Jiri Olsa
3ce311afb5
libperf: Move to tools/lib/perf
...
Move libperf from its current location under tools/perf to a separate
directory under tools/lib/.
Also change various paths (mainly includes) to reflect the libperf move
to a separate directory and add a new directory under MANIFEST.
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 >
Link: http://lore.kernel.org/lkml/20191206210612.8676-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2020-01-06 11:46:09 -03:00
