perf trace: Beautify eventfd2 'flags' arg
61.168 ( 0.004 ms): 24267 eventfd2(flags: CLOEXEC|NONBLOCK) = 9 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-3hg8eajdzil077501c8f5jkw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -13,6 +13,7 @@
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#include <libaudit.h>
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#include <stdlib.h>
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#include <sys/eventfd.h>
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#include <sys/mman.h>
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#include <linux/futex.h>
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@ -456,6 +457,32 @@ static size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size,
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#define SCA_OPEN_FLAGS syscall_arg__scnprintf_open_flags
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static size_t syscall_arg__scnprintf_eventfd_flags(char *bf, size_t size,
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struct syscall_arg *arg)
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{
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int printed = 0, flags = arg->val;
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if (flags == 0)
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return scnprintf(bf, size, "NONE");
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#define P_FLAG(n) \
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if (flags & EFD_##n) { \
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printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
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flags &= ~EFD_##n; \
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}
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P_FLAG(SEMAPHORE);
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P_FLAG(CLOEXEC);
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P_FLAG(NONBLOCK);
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#undef P_FLAG
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if (flags)
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printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
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return printed;
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}
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#define SCA_EFD_FLAGS syscall_arg__scnprintf_eventfd_flags
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static size_t syscall_arg__scnprintf_signum(char *bf, size_t size, struct syscall_arg *arg)
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{
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int sig = arg->val;
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@ -516,6 +543,8 @@ static struct syscall_fmt {
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{ .name = "brk", .hexret = true,
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.arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
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{ .name = "connect", .errmsg = true, },
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{ .name = "eventfd2", .errmsg = true,
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.arg_scnprintf = { [1] = SCA_EFD_FLAGS, /* flags */ }, },
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{ .name = "fcntl", .errmsg = true,
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.arg_scnprintf = { [1] = SCA_STRARRAY, /* cmd */ },
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.arg_parm = { [1] = &strarray__fcntl_cmds, /* cmd */ }, },
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