Messages in this thread Patch in this message | | | Date | Mon, 6 Jul 2015 09:30:38 -0700 | From | tip-bot for Arnaldo Carvalho de Melo <> | Subject | [tip:perf/core] perf tools: Asprintf like functions to format integer filter expression |
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Commit-ID: 93ec4ce789995c5c58dff82193b3ec77caa8aecb Gitweb: http://git.kernel.org/tip/93ec4ce789995c5c58dff82193b3ec77caa8aecb Author: Arnaldo Carvalho de Melo <acme@redhat.com> AuthorDate: Thu, 2 Jul 2015 17:48:23 -0300 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Mon, 6 Jul 2015 10:21:46 -0300
perf tools: Asprintf like functions to format integer filter expression
char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints); char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints);
Example of output formatted with those functions:
# ./tp_filter 6 12 2015 asprintf_expr_in_ints: id == 6 || id == 12 || id == 2015 asprintf_expr_not_in_ints: id != 6 && id != 12 && id != 2015 #
It'll be used with, for instance, perf_evsel__set_filter_in_ints(), that will be used in turn to ask the kernel to filter out all raw_syscalls:* except for the ones specified by the user via:
$ perf trace -e some,list,of,syscalls
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-jt07vfp6bd8y50c05j1t7hrn@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/string.c | 39 +++++++++++++++++++++++++++++++++++++++ tools/perf/util/util.h | 12 ++++++++++++ 2 files changed, 51 insertions(+)
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c index 6afd610..fc8781d 100644 --- a/tools/perf/util/string.c +++ b/tools/perf/util/string.c @@ -357,3 +357,42 @@ void *memdup(const void *src, size_t len) return p; } + +char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints) +{ + /* + * FIXME: replace this with an expression using log10() when we + * find a suitable implementation, maybe the one in the dvb drivers... + * + * "%s == %d || " = log10(MAXINT) * 2 + 8 chars for the operators + */ + size_t size = nints * 28 + 1; /* \0 */ + size_t i, printed = 0; + char *expr = malloc(size); + + if (expr) { + const char *or_and = "||", *eq_neq = "=="; + char *e = expr; + + if (!in) { + or_and = "&&"; + eq_neq = "!="; + } + + for (i = 0; i < nints; ++i) { + if (printed == size) + goto out_err_overflow; + + if (i > 0) + printed += snprintf(e + printed, size - printed, " %s ", or_and); + printed += scnprintf(e + printed, size - printed, + "%s %s %d", var, eq_neq, ints[i]); + } + } + + return expr; + +out_err_overflow: + free(expr); + return NULL; +} diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 8bce58b..20d625a 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -339,4 +339,16 @@ int gzip_decompress_to_file(const char *input, int output_fd); int lzma_decompress_to_file(const char *input, int output_fd); #endif +char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints); + +static inline char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints) +{ + return asprintf_expr_inout_ints(var, true, nints, ints); +} + +static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints) +{ + return asprintf_expr_inout_ints(var, false, nints, ints); +} + #endif /* GIT_COMPAT_UTIL_H */
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