perf check: Introduce 'check' subcommand
Currently the presence of a feature is checked with a combination of perf version --build-options and greps, such as: perf version --build-options | grep " on .* HAVE_FEATURE" Instead of this, introduce a subcommand "perf check feature", with which scripts can test for presence of a feature, such as: perf check feature HAVE_FEATURE 'perf check feature' command is expected to have exit status of 0 if feature is built-in, and 1 if it's not built-in or if feature is not known. Multiple features can also be passed as a comma-separated list, in which case the exit status will be 1 only if all of the passed features are built-in. For example, with below command, it will have exit status of 0 only if both libtraceevent and bpf are enabled, else 1 in all other cases perf check feature libtraceevent,bpf The arguments are case-insensitive. An array 'supported_features' has also been introduced that can be used by other commands like 'perf version --build-options', so that new features can be added in one place, with the array Committer testing: $ perf check feature libtraceevent,bpf libtraceevent: [ on ] # HAVE_LIBTRACEEVENT bpf: [ on ] # HAVE_LIBBPF_SUPPORT $ perf check feature libtraceevent libtraceevent: [ on ] # HAVE_LIBTRACEEVENT $ perf check feature bpf bpf: [ on ] # HAVE_LIBBPF_SUPPORT $ perf check -q feature bpf && echo "BPF support is present" BPF support is present $ perf check -q feature Bogus && echo "Bogus support is present" $ Reviewed-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Signed-off-by: Aditya Gupta <adityag@linux.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Disha Goel <disgoel@linux.vnet.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240904061836.55873-3-adityag@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -1,5 +1,6 @@
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perf-bench-y += builtin-bench.o
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perf-bench-y += builtin-bench.o
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perf-y += builtin-annotate.o
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perf-y += builtin-annotate.o
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perf-y += builtin-check.o
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perf-y += builtin-config.o
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perf-y += builtin-config.o
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perf-y += builtin-diff.o
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perf-y += builtin-diff.o
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perf-y += builtin-evlist.o
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perf-y += builtin-evlist.o
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82
tools/perf/Documentation/perf-check.txt
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82
tools/perf/Documentation/perf-check.txt
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perf-check(1)
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===============
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NAME
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----
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perf-check - check if features are present in perf
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SYNOPSIS
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--------
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[verse]
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'perf check' [<options>]
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'perf check' {feature <feature_list>} [<options>]
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DESCRIPTION
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-----------
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With no subcommands given, 'perf check' command just prints the command
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usage on the standard output.
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If the subcommand 'feature' is used, then status of feature is printed
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on the standard output (unless '-q' is also passed), ie. whether it is
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compiled-in/built-in or not.
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Also, 'perf check feature' returns with exit status 0 if the feature
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is built-in, otherwise returns with exit status 1.
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SUBCOMMANDS
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-----------
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feature::
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Print whether feature(s) is compiled-in or not, and also returns with an
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exit status of 0, if passed feature(s) are compiled-in, else 1.
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It expects a feature list as an argument. There can be a single feature
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name/macro, or multiple features can also be passed as a comma-separated
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list, in which case the exit status will be 0 only if all of the passed
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features are compiled-in.
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The feature names/macros are case-insensitive.
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Example Usage:
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perf check feature libtraceevent
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perf check feature HAVE_LIBTRACEEVENT
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perf check feature libtraceevent,bpf
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Supported feature names/macro:
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aio / HAVE_AIO_SUPPORT
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bpf / HAVE_LIBBPF_SUPPORT
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bpf_skeletons / HAVE_BPF_SKEL
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debuginfod / HAVE_DEBUGINFOD_SUPPORT
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dwarf / HAVE_DWARF_SUPPORT
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dwarf_getlocations / HAVE_DWARF_GETLOCATIONS_SUPPORT
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dwarf-unwind-support / HAVE_DWARF_UNWIND_SUPPORT
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get_cpuid / HAVE_AUXTRACE_SUPPORT
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libaudit / HAVE_LIBAUDIT_SUPPORT
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libbfd / HAVE_LIBBFD_SUPPORT
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libcapstone / HAVE_LIBCAPSTONE_SUPPORT
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libcrypto / HAVE_LIBCRYPTO_SUPPORT
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libdw-dwarf-unwind / HAVE_DWARF_SUPPORT
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libelf / HAVE_LIBELF_SUPPORT
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libnuma / HAVE_LIBNUMA_SUPPORT
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libopencsd / HAVE_CSTRACE_SUPPORT
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libperl / HAVE_LIBPERL_SUPPORT
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libpfm4 / HAVE_LIBPFM
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libpython / HAVE_LIBPYTHON_SUPPORT
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libslang / HAVE_SLANG_SUPPORT
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libtraceevent / HAVE_LIBTRACEEVENT
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libunwind / HAVE_LIBUNWIND_SUPPORT
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lzma / HAVE_LZMA_SUPPORT
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numa_num_possible_cpus / HAVE_LIBNUMA_SUPPORT
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syscall_table / HAVE_SYSCALL_TABLE_SUPPORT
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zlib / HAVE_ZLIB_SUPPORT
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zstd / HAVE_ZSTD_SUPPORT
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OPTIONS
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-------
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-q::
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--quiet::
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Do not print any messages or warnings
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This can be used along with subcommands such as 'perf check feature'
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to hide unnecessary output in test scripts, eg.
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'perf check feature --quiet libtraceevent'
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180
tools/perf/builtin-check.c
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180
tools/perf/builtin-check.c
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// SPDX-License-Identifier: GPL-2.0
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#include "builtin.h"
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#include "color.h"
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#include "util/debug.h"
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#include "util/header.h"
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#include <tools/config.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <subcmd/parse-options.h>
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static const char * const check_subcommands[] = { "feature", NULL };
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static struct option check_options[] = {
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OPT_BOOLEAN('q', "quiet", &quiet, "do not show any warnings or messages"),
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OPT_END()
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};
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static struct option check_feature_options[] = { OPT_PARENT(check_options) };
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static const char *check_usage[] = { NULL, NULL };
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static const char *check_feature_usage[] = {
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"perf check feature <feature_list>",
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NULL
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};
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struct feature_status supported_features[] = {
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FEATURE_STATUS("aio", HAVE_AIO_SUPPORT),
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FEATURE_STATUS("bpf", HAVE_LIBBPF_SUPPORT),
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FEATURE_STATUS("bpf_skeletons", HAVE_BPF_SKEL),
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FEATURE_STATUS("debuginfod", HAVE_DEBUGINFOD_SUPPORT),
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FEATURE_STATUS("dwarf", HAVE_DWARF_SUPPORT),
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FEATURE_STATUS("dwarf_getlocations", HAVE_DWARF_GETLOCATIONS_SUPPORT),
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FEATURE_STATUS("dwarf-unwind-support", HAVE_DWARF_UNWIND_SUPPORT),
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FEATURE_STATUS("get_cpuid", HAVE_AUXTRACE_SUPPORT),
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FEATURE_STATUS("libaudit", HAVE_LIBAUDIT_SUPPORT),
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FEATURE_STATUS("libbfd", HAVE_LIBBFD_SUPPORT),
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FEATURE_STATUS("libcapstone", HAVE_LIBCAPSTONE_SUPPORT),
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FEATURE_STATUS("libcrypto", HAVE_LIBCRYPTO_SUPPORT),
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FEATURE_STATUS("libdw-dwarf-unwind", HAVE_DWARF_SUPPORT),
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FEATURE_STATUS("libelf", HAVE_LIBELF_SUPPORT),
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FEATURE_STATUS("libnuma", HAVE_LIBNUMA_SUPPORT),
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FEATURE_STATUS("libopencsd", HAVE_CSTRACE_SUPPORT),
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FEATURE_STATUS("libperl", HAVE_LIBPERL_SUPPORT),
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FEATURE_STATUS("libpfm4", HAVE_LIBPFM),
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FEATURE_STATUS("libpython", HAVE_LIBPYTHON_SUPPORT),
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FEATURE_STATUS("libslang", HAVE_SLANG_SUPPORT),
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FEATURE_STATUS("libtraceevent", HAVE_LIBTRACEEVENT),
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FEATURE_STATUS("libunwind", HAVE_LIBUNWIND_SUPPORT),
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FEATURE_STATUS("lzma", HAVE_LZMA_SUPPORT),
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FEATURE_STATUS("numa_num_possible_cpus", HAVE_LIBNUMA_SUPPORT),
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FEATURE_STATUS("syscall_table", HAVE_SYSCALL_TABLE_SUPPORT),
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FEATURE_STATUS("zlib", HAVE_ZLIB_SUPPORT),
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FEATURE_STATUS("zstd", HAVE_ZSTD_SUPPORT),
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/* this should remain at end, to know the array end */
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FEATURE_STATUS(NULL, _)
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};
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static void on_off_print(const char *status)
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{
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printf("[ ");
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if (!strcmp(status, "OFF"))
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color_fprintf(stdout, PERF_COLOR_RED, "%-3s", status);
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else
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color_fprintf(stdout, PERF_COLOR_GREEN, "%-3s", status);
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printf(" ]");
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}
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/* Helper function to print status of a feature along with name/macro */
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static void status_print(const char *name, const char *macro,
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const char *status)
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{
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printf("%22s: ", name);
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on_off_print(status);
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printf(" # %s\n", macro);
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}
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#define STATUS(feature) \
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do { \
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if (feature.is_builtin) \
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status_print(feature.name, feature.macro, "on"); \
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else \
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status_print(feature.name, feature.macro, "OFF"); \
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} while (0)
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/**
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* check whether "feature" is built-in with perf
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*
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* returns:
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* 0: NOT built-in or Feature not known
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* 1: Built-in
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*/
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static int has_support(const char *feature)
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{
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for (int i = 0; supported_features[i].name; ++i) {
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if ((strcasecmp(feature, supported_features[i].name) == 0) ||
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(strcasecmp(feature, supported_features[i].macro) == 0)) {
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if (!quiet)
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STATUS(supported_features[i]);
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return supported_features[i].is_builtin;
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}
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}
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if (!quiet)
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pr_err("Unknown feature '%s', please use 'perf version --build-options' to see which ones are available.\n", feature);
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return 0;
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}
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/**
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* Usage: 'perf check feature <feature_list>'
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*
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* <feature_list> can be a single feature name/macro, or a comma-separated list
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* of feature names/macros
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* eg. argument can be "libtraceevent" or "libtraceevent,bpf" etc
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*
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* In case of a comma-separated list, feature_enabled will be 1, only if
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* all features passed in the string are supported
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*
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* Note that argv will get modified
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*/
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static int subcommand_feature(int argc, const char **argv)
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{
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char *feature_list;
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char *feature_name;
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int feature_enabled;
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argc = parse_options(argc, argv, check_feature_options,
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check_feature_usage, 0);
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if (!argc)
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usage_with_options(check_feature_usage, check_feature_options);
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if (argc > 1) {
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pr_err("Too many arguments passed to 'perf check feature'\n");
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return -1;
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}
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feature_enabled = 1;
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/* feature_list is a non-const copy of 'argv[0]' */
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feature_list = strdup(argv[0]);
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if (!feature_list) {
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pr_err("ERROR: failed to allocate memory for feature list\n");
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return -1;
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}
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feature_name = strtok(feature_list, ",");
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while (feature_name) {
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feature_enabled &= has_support(feature_name);
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feature_name = strtok(NULL, ",");
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}
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free(feature_list);
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return !feature_enabled;
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}
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int cmd_check(int argc, const char **argv)
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{
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argc = parse_options_subcommand(argc, argv, check_options,
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check_subcommands, check_usage, 0);
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if (!argc)
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usage_with_options(check_usage, check_options);
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if (strcmp(argv[0], "feature") == 0)
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return subcommand_feature(argc, argv);
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/* If no subcommand matched above, print usage help */
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pr_err("Unknown subcommand: %s\n", argv[0]);
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usage_with_options(check_usage, check_options);
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/* free usage string allocated by parse_options_subcommand */
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free((void *)check_usage[0]);
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return 0;
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}
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#ifndef BUILTIN_H
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#ifndef BUILTIN_H
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#define BUILTIN_H
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#define BUILTIN_H
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#include <stddef.h>
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#include <linux/compiler.h>
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#include <tools/config.h>
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struct feature_status {
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const char *name;
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const char *macro;
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int is_builtin;
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};
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#define FEATURE_STATUS(name_, macro_) { \
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.name = name_, \
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.macro = #macro_, \
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.is_builtin = IS_BUILTIN(macro_) }
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extern struct feature_status supported_features[];
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struct cmdnames;
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struct cmdnames;
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void list_common_cmds_help(void);
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void list_common_cmds_help(void);
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int cmd_bench(int argc, const char **argv);
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int cmd_bench(int argc, const char **argv);
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int cmd_buildid_cache(int argc, const char **argv);
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int cmd_buildid_cache(int argc, const char **argv);
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int cmd_buildid_list(int argc, const char **argv);
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int cmd_buildid_list(int argc, const char **argv);
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int cmd_check(int argc, const char **argv);
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int cmd_config(int argc, const char **argv);
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int cmd_config(int argc, const char **argv);
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int cmd_c2c(int argc, const char **argv);
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int cmd_c2c(int argc, const char **argv);
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int cmd_diff(int argc, const char **argv);
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int cmd_diff(int argc, const char **argv);
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@ -52,6 +52,7 @@ static struct cmd_struct commands[] = {
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{ "archive", NULL, 0 },
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{ "archive", NULL, 0 },
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{ "buildid-cache", cmd_buildid_cache, 0 },
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{ "buildid-cache", cmd_buildid_cache, 0 },
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{ "buildid-list", cmd_buildid_list, 0 },
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{ "buildid-list", cmd_buildid_list, 0 },
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{ "check", cmd_check, 0 },
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{ "config", cmd_config, 0 },
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{ "config", cmd_config, 0 },
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{ "c2c", cmd_c2c, 0 },
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{ "c2c", cmd_c2c, 0 },
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{ "diff", cmd_diff, 0 },
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{ "diff", cmd_diff, 0 },
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