forked from Minki/linux
4c1cf20334
Add quotes around the register name and suggest using 'perf record -I?'
to get the list of available registers.
Before:
# perf record -Idi,xmm20,xmm1
Warning:
unknown register xmm20, check man page
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
-I, --intr-regs[=<any register>]
sample selected machine registers on interrupt, use -I ? to list register names
#
# perf record -Idi,xmm20,xmm1
Warning:
unknown register "xmm20", check man page or run "perf record -I?"
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
-I, --intr-regs[=<any register>]
sample selected machine registers on interrupt, use -I ? to list register names
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lkml.kernel.org/n/tip-9a9hyuum8c0oggg86xd3sxc5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "perf.h"
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#include "util/util.h"
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#include "util/debug.h"
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#include <subcmd/parse-options.h>
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#include "util/parse-regs-options.h"
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int
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parse_regs(const struct option *opt, const char *str, int unset)
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{
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uint64_t *mode = (uint64_t *)opt->value;
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const struct sample_reg *r;
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char *s, *os = NULL, *p;
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int ret = -1;
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if (unset)
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return 0;
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/*
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* cannot set it twice
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*/
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if (*mode)
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return -1;
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/* str may be NULL in case no arg is passed to -I */
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if (str) {
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/* because str is read-only */
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s = os = strdup(str);
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if (!s)
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return -1;
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for (;;) {
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p = strchr(s, ',');
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if (p)
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*p = '\0';
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if (!strcmp(s, "?")) {
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fprintf(stderr, "available registers: ");
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for (r = sample_reg_masks; r->name; r++) {
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fprintf(stderr, "%s ", r->name);
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}
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fputc('\n', stderr);
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/* just printing available regs */
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return -1;
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}
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for (r = sample_reg_masks; r->name; r++) {
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if (!strcasecmp(s, r->name))
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break;
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}
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if (!r->name) {
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ui__warning("Unknown register \"%s\", check man page or run \"perf record -I?\"\n", s);
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goto error;
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}
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*mode |= r->mask;
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if (!p)
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break;
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s = p + 1;
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}
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}
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ret = 0;
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/* default to all possible regs */
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if (*mode == 0)
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*mode = PERF_REGS_MASK;
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error:
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free(os);
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return ret;
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}
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