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perf trace: Beautify wait4/waitid 'options' argument 

# trace -e waitid,wait4

   0.557 ( 0.557 ms): bash/27335 wait4(upid: -1, stat_addr: 0x7ffd02f449f0) = 27336
   1.250 ( 0.685 ms): bash/27335 wait4(upid: -1, stat_addr: 0x7ffd02f449f0) = 27337
   1.312 ( 0.002 ms): bash/27335 wait4(upid: -1, stat_addr: 0x7ffd02f44690, options: NOHANG) = -1 ECHILD No child processes
   1.550 ( 0.015 ms): bash/3856 wait4(upid: -1, stat_addr: 0x7ffd02f44990, options: NOHANG|UNTRACED|CONTINUED) = 27335
   1.552 ( 0.001 ms): bash/3856 wait4(upid: -1, stat_addr: 0x7ffd02f44990, options: NOHANG|UNTRACED|CONTINUED) = 0
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-i5vlo5n5jv0amt8bkyicmdxh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Arnaldo Carvalho de Melo 2016-04-06 14:11:36 -03:00
parent a3bca91f2f
commit 7206b900e6
2 changed files with 31 additions and 0 deletions
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5
tools/perf/builtin-trace.c
View File

@ -1074,6 +1074,7 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
.arg_parm = { [arg] = &strarray__##array, }
#include "trace/beauty/sched_policy.c"
#include "trace/beauty/waitid_options.c"
static struct syscall_fmt {
const char *name;
@ -1364,6 +1365,10 @@ static struct syscall_fmt {
.arg_scnprintf = { [0] = SCA_FILENAME, /* filename */ }, },
{ .name = "vmsplice", .errmsg = true,
.arg_scnprintf = { [0] = SCA_FD, /* fd */ }, },
{ .name = "wait4", .errmsg = true,
.arg_scnprintf = { [2] = SCA_WAITID_OPTIONS, /* options */ }, },
{ .name = "waitid", .errmsg = true,
.arg_scnprintf = { [3] = SCA_WAITID_OPTIONS, /* options */ }, },
{ .name = "write", .errmsg = true,
.arg_scnprintf = { [0] = SCA_FD, /* fd */ }, },
{ .name = "writev", .errmsg = true,

26
tools/perf/trace/beauty/waitid_options.c 100644
View File

@ -0,0 +1,26 @@
#include <sys/types.h>
#include <sys/wait.h>
static size_t syscall_arg__scnprintf_waitid_options(char *bf, size_t size,
struct syscall_arg *arg)
{
int printed = 0, options = arg->val;
#define P_OPTION(n) \
if (options & W##n) { \
printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
options &= ~W##n; \
}
P_OPTION(NOHANG);
P_OPTION(UNTRACED);
P_OPTION(CONTINUED);
#undef P_OPTION
if (options)
printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", options);
return printed;
}
#define SCA_WAITID_OPTIONS syscall_arg__scnprintf_waitid_options