perf trace: Put syscall formatter parms into struct

So that we can add more state to formatters without having to modify
all of them.

Example is to pass a table to a generic string formatter, like for
setitimer 'which' arg.

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-zyi2esmas5wfrxznh0x0fkiz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 71aa3e3..939426c 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -33,22 +33,24 @@
 # define MADV_UNMERGEABLE      13
 #endif
 
+struct syscall_arg {
+       unsigned long val;
+       u8            idx;
+       u8            mask;
+};
+
 static size_t syscall_arg__scnprintf_hex(char *bf, size_t size,
-                                        unsigned long arg,
-                                        u8 arg_idx __maybe_unused,
-                                        u8 *arg_mask __maybe_unused)
+                                        struct syscall_arg *arg)
 {
-       return scnprintf(bf, size, "%#lx", arg);
+       return scnprintf(bf, size, "%#lx", arg->val);
 }
 
 #define SCA_HEX syscall_arg__scnprintf_hex
 
 static size_t syscall_arg__scnprintf_whence(char *bf, size_t size,
-                                           unsigned long arg,
-                                           u8 arg_idx __maybe_unused,
-                                           u8 *arg_mask __maybe_unused)
+                                           struct syscall_arg *arg)
 {
-       int whence = arg;
+       int whence = arg->val;
 
        switch (whence) {
 #define P_WHENCE(n) case SEEK_##n: return scnprintf(bf, size, #n)
@@ -71,11 +73,9 @@ static size_t syscall_arg__scnprintf_whence(char *bf, size_t size,
 #define SCA_WHENCE syscall_arg__scnprintf_whence
 
 static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
-                                              unsigned long arg,
-                                              u8 arg_idx __maybe_unused,
-                                              u8 *arg_mask __maybe_unused)
+                                              struct syscall_arg *arg)
 {
-       int printed = 0, prot = arg;
+       int printed = 0, prot = arg->val;
 
        if (prot == PROT_NONE)
                return scnprintf(bf, size, "NONE");
@@ -104,10 +104,9 @@ static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
 #define SCA_MMAP_PROT syscall_arg__scnprintf_mmap_prot
 
 static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,
-                                               unsigned long arg, u8 arg_idx __maybe_unused,
-                                               u8 *arg_mask __maybe_unused)
+                                               struct syscall_arg *arg)
 {
-       int printed = 0, flags = arg;
+       int printed = 0, flags = arg->val;
 
 #define        P_MMAP_FLAG(n) \
        if (flags & MAP_##n) { \
@@ -148,10 +147,9 @@ static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,
 #define SCA_MMAP_FLAGS syscall_arg__scnprintf_mmap_flags
 
 static size_t syscall_arg__scnprintf_madvise_behavior(char *bf, size_t size,
-                                                     unsigned long arg, u8 arg_idx __maybe_unused,
-                                                     u8 *arg_mask __maybe_unused)
+                                                     struct syscall_arg *arg)
 {
-       int behavior = arg;
+       int behavior = arg->val;
 
        switch (behavior) {
 #define        P_MADV_BHV(n) case MADV_##n: return scnprintf(bf, size, #n)
@@ -190,8 +188,7 @@ 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_idx __maybe_unused, u8 *arg_mask)
+static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
 {
        enum syscall_futex_args {
                SCF_UADDR   = (1 << 0),
@@ -201,24 +198,24 @@ static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, unsigned lo
                SCF_UADDR2  = (1 << 4),
                SCF_VAL3    = (1 << 5),
        };
-       int op = arg;
+       int op = arg->val;
        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(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(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;
        }
@@ -235,13 +232,12 @@ static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, unsigned lo
 #define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op
 
 static size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size,
-                                              unsigned long arg,
-                                              u8 arg_idx, u8 *arg_mask)
+                                              struct syscall_arg *arg)
 {
-       int printed = 0, flags = arg;
+       int printed = 0, flags = arg->val;
 
        if (!(flags & O_CREAT))
-               *arg_mask |= 1 << (arg_idx + 1); /* Mask the mode parm */
+               arg->mask |= 1 << (arg->idx + 1); /* Mask the mode parm */
 
        if (flags == 0)
                return scnprintf(bf, size, "RDONLY");
@@ -294,7 +290,7 @@ static size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size,
 static struct syscall_fmt {
        const char *name;
        const char *alias;
-       size_t     (*arg_scnprintf[6])(char *bf, size_t size, unsigned long arg, u8 arg_idx, u8 *arg_mask);
+       size_t     (*arg_scnprintf[6])(char *bf, size_t size, struct syscall_arg *arg);
        bool       errmsg;
        bool       timeout;
        bool       hexret;
@@ -364,8 +360,7 @@ struct syscall {
        const char          *name;
        bool                filtered;
        struct syscall_fmt  *fmt;
-       size_t              (**arg_scnprintf)(char *bf, size_t size,
-                                             unsigned long arg, u8 arg_idx, u8 *args_mask);
+       size_t              (**arg_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
 };
 
 static size_t fprintf_duration(unsigned long t, FILE *fp)
@@ -605,30 +600,35 @@ static int trace__read_syscall_info(struct trace *trace, int id)
 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
                                      unsigned long *args)
 {
-       int i = 0;
        size_t printed = 0;
 
        if (sc->tp_format != NULL) {
                struct format_field *field;
-               u8 mask = 0, bit = 1;
+               u8 bit = 1;
+               struct syscall_arg arg = {
+                       .idx  = 0,
+                       .mask = 0,
+               };
 
                for (field = sc->tp_format->format.fields->next; field;
-                    field = field->next, ++i, bit <<= 1) {
-                       if (mask & bit)
+                    field = field->next, ++arg.idx, bit <<= 1) {
+                       if (arg.mask & bit)
                                continue;
 
                        printed += scnprintf(bf + printed, size - printed,
                                             "%s%s: ", printed ? ", " : "", field->name);
-
-                       if (sc->arg_scnprintf && sc->arg_scnprintf[i]) {
-                               printed += sc->arg_scnprintf[i](bf + printed, size - printed,
-                                                               args[i], i, &mask);
+                       if (sc->arg_scnprintf && sc->arg_scnprintf[arg.idx]) {
+                               arg.val = args[arg.idx];
+                               printed += sc->arg_scnprintf[arg.idx](bf + printed,
+                                                                     size - printed, &arg);
                        } else {
                                printed += scnprintf(bf + printed, size - printed,
-                                                    "%ld", args[i]);
+                                                    "%ld", args[arg.idx]);
                        }
                }
        } else {
+               int i = 0;
+
                while (i < 6) {
                        printed += scnprintf(bf + printed, size - printed,
                                             "%sarg%d: %ld",