Add argument description info for SDT probes.

Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>

diff --git a/dtrace/sdt_dev.c b/dtrace/sdt_dev.c
index 846afb9845639b0d2d1fec6144c902716bc3c20f..07e08bf78a828e5aac2f811e6e2ee58a161d8400 100644 (file)
--- a/dtrace/sdt_dev.c
+++ b/dtrace/sdt_dev.c
@@ -42,6 +42,21 @@ static sdt_probe_t   **sdt_probetab;
 static int             sdt_probetab_size;
 static int             sdt_probetab_mask;
 
+static sdt_argdesc_t   sdt_args[] = {
+       { "proc", "create", 0, 0, "struct task_struct *", },
+       { "proc", "exec", 0, 0, "char *", },
+       { "proc", "exec-failure", 0, 0, "int", },
+       { "proc", "exit", 0, 0, "int", },
+       { "proc", "lwp_create", 0, 0, "struct task_struct *", },
+       { "proc", "lwp_exit", 0, 0, "int", },
+       { "proc", "signal-handle", 0, 0, "int" },
+       { "proc", "signal-handle", 1, 0 /* 1 */, "siginfo_t *" },
+       { "proc", "signal-handle", 2, 0 /* 2 */, "void (*)(void)" },
+       { "proc", "signal-send", 0, 0, "struct task_struct *", },
+       { "proc", "signal-send", 1, 0, "int", },
+       { NULL, }
+};
+
 static int sdt_invop(struct pt_regs *regs)
 {
        sdt_probe_t     *sdt = sdt_probetab[SDT_ADDR2NDX(regs->ip)];
@@ -160,6 +175,37 @@ void _sdt_disable(void *arg, dtrace_id_t id, void *parg)
 void sdt_getargdesc(void *arg, dtrace_id_t id, void *parg,
                    dtrace_argdesc_t *desc)
 {
+       sdt_probe_t     *sdp = parg;
+       int             i;
+
+       desc->dtargd_native[0] = '\0';
+       desc->dtargd_xlate[0] = '\0';
+
+       for (i = 0; sdt_args[i].sda_provider != NULL; i++) {
+               sdt_argdesc_t   *a = &sdt_args[i];
+
+               if (strcmp(sdp->sdp_provider->dtmp_name, a->sda_provider) != 0)
+                       continue;
+
+               if (a->sda_name != NULL &&
+                   strcmp(sdp->sdp_name, a->sda_name) != 0)
+                               continue;
+
+               if (desc->dtargd_ndx != a->sda_ndx)
+                       continue;
+
+               if (a->sda_native != NULL)
+                       strcpy(desc->dtargd_native, a->sda_native);
+
+               if (a->sda_xlate != NULL)
+                       strcpy(desc->dtargd_xlate, a->sda_xlate);
+
+               desc->dtargd_mapping = a->sda_mapping;
+
+               return;
+       }
+
+       desc->dtargd_ndx = DTRACE_ARGNONE;
 }
 
 uint64_t sdt_getarg(void *arg, dtrace_id_t id, void *parg, int argno,