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authorArnaldo Carvalho de Melo <acme@redhat.com>2016-04-06 14:11:36 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-04-06 14:13:43 -0300
commit7206b900e6e4b7f4c2e766eab64ea1ca5303e421 (patch)
tree8df37e19570842ca304ea6d179ba2e3e9241c5fa /tools/perf/trace
parenta3bca91f2fe54af502deaf277dd5ac0e18bffde4 (diff)
downloadlinux-7206b900e6e4b7f4c2e766eab64ea1ca5303e421.tar.gz
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>
Diffstat (limited to 'tools/perf/trace')
-rw-r--r--tools/perf/trace/beauty/waitid_options.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/perf/trace/beauty/waitid_options.c b/tools/perf/trace/beauty/waitid_options.c
new file mode 100644
index 000000000000..7942724adec8
--- /dev/null
+++ b/tools/perf/trace/beauty/waitid_options.c
@@ -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