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perf trace: Allow specifying index offset in strarrays

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So that the index passed doesn't have to start at zero, being
decremented from an offset specified when declaring the strarray before
being used as the real array index.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-k1ce6uqyt4qar9edrj3mevod@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-10-08 16:00:21 -03:00
parent 316d70d6db
commit 03e3adc9f4
1 changed files with 11 additions and 4 deletions
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15
tools/perf/builtin-trace.c
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@ -44,6 +44,7 @@ struct syscall_arg {
};
struct strarray {
int offset;
int nr_entries;
const char **entries;
};
@ -53,14 +54,20 @@ struct strarray {
.entries = array, \
}
#define DEFINE_STRARRAY_OFFSET(array, off) struct strarray strarray__##array = { \
.offset = off, \
.nr_entries = ARRAY_SIZE(array), \
.entries = array, \
}
static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
struct syscall_arg *arg)
{
int idx = arg->val;
struct strarray *sa = arg->parm;
int idx = arg->val - sa->offset;
if (idx < 0 || idx >= sa->nr_entries)
return scnprintf(bf, size, "%d", idx);
return scnprintf(bf, size, "%d", arg->val);
return scnprintf(bf, size, "%s", sa->entries[idx]);
}
@ -288,8 +295,8 @@ static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct sysc
#define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op
static const char *epoll_ctl_ops[] = { [1] = "ADD", "DEL", "MOD", };
static DEFINE_STRARRAY(epoll_ctl_ops);
static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
static DEFINE_STRARRAY(itimers);