From f9da0b0c74af25a68b9ac43a2c81f2eea970de5a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 2 Sep 2013 13:46:44 -0300 Subject: [PATCH] perf trace: Add beautifier for futex 'operation' parm That uses the arg mask mechanism just introduced to suppress ignored arguments according to the futex operation. Based on an initial patch from David Ahern that showed the need for some way to allow args to tell how many further args should be shown. Initial-patch-by: David Ahern Cc: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-0k30it46r4hv5eanefbdmj5t@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 47 +++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index c29692ab1891..1a6cb7436952 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -14,6 +14,7 @@ #include #include #include +#include static size_t syscall_arg__scnprintf_hex(char *bf, size_t size, unsigned long arg, u8 *arg_mask __maybe_unused) @@ -137,6 +138,49 @@ static size_t syscall_arg__scnprintf_madvise_behavior(char *bf, size_t size, #define SCA_MADV_BHV syscall_arg__scnprintf_madvise_behavior +static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, unsigned long arg, u8 *arg_mask) +{ + enum syscall_futex_args { + SCF_UADDR = (1 << 0), + SCF_OP = (1 << 1), + SCF_VAL = (1 << 2), + SCF_TIMEOUT = (1 << 3), + SCF_UADDR2 = (1 << 4), + SCF_VAL3 = (1 << 5), + }; + int op = arg; + int cmd = op & FUTEX_CMD_MASK; + size_t printed = 0; + + switch (cmd) { +#define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n); + P_FUTEX_OP(WAIT); *arg_mask |= SCF_VAL3|SCF_UADDR2; break; + P_FUTEX_OP(WAKE); *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; + P_FUTEX_OP(FD); *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; + P_FUTEX_OP(REQUEUE); *arg_mask |= SCF_VAL3|SCF_TIMEOUT; break; + P_FUTEX_OP(CMP_REQUEUE); *arg_mask |= SCF_TIMEOUT; break; + P_FUTEX_OP(CMP_REQUEUE_PI); *arg_mask |= SCF_TIMEOUT; break; + P_FUTEX_OP(WAKE_OP); break; + P_FUTEX_OP(LOCK_PI); *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; + P_FUTEX_OP(UNLOCK_PI); *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; + P_FUTEX_OP(TRYLOCK_PI); *arg_mask |= SCF_VAL3|SCF_UADDR2; break; + P_FUTEX_OP(WAIT_BITSET); *arg_mask |= SCF_UADDR2; break; + P_FUTEX_OP(WAKE_BITSET); *arg_mask |= SCF_UADDR2; break; + P_FUTEX_OP(WAIT_REQUEUE_PI); break; + default: printed = scnprintf(bf, size, "%#x", cmd); break; + } + + if (op & FUTEX_PRIVATE_FLAG) + printed += scnprintf(bf + printed, size - printed, "|PRIV"); + + if (op & FUTEX_CLOCK_REALTIME) + printed += scnprintf(bf + printed, size - printed, "|CLKRT"); + + return printed; +} + +#define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op + static struct syscall_fmt { const char *name; const char *alias; @@ -153,7 +197,8 @@ static struct syscall_fmt { { .name = "connect", .errmsg = true, }, { .name = "fstat", .errmsg = true, .alias = "newfstat", }, { .name = "fstatat", .errmsg = true, .alias = "newfstatat", }, - { .name = "futex", .errmsg = true, }, + { .name = "futex", .errmsg = true, + .arg_scnprintf = { [1] = SCA_FUTEX_OP, /* op */ }, }, { .name = "ioctl", .errmsg = true, .arg_scnprintf = { [2] = SCA_HEX, /* arg */ }, }, { .name = "lstat", .errmsg = true, .alias = "newlstat", }, -- 2.39.5