Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 22:51:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf trace: Add beautifier for futex 'operation' parm

Browse Source 
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 <dsahern@gmail.com>
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-0k30it46r4hv5eanefbdmj5t@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-09-02 13:46:44 -03:00
parent 6e7eeb5110
commit f9da0b0c74
1 changed files with 46 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
tools/perf/builtin-trace.c
View File

@ -14,6 +14,7 @@
#include <libaudit.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <linux/futex.h>
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", },