8158 Want named threads API
9857 proc manpages should have LIBRARY section

@@ -24,11 +24,11 @@
  * Use is subject to license terms.
  */
 
 /*
  * Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
- * Copyright (c) 2014, Joyent, Inc. All rights reserved.
+ * Copyright 2018 Joyent, Inc.
  */
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/thread.h>

@@ -92,11 +92,11 @@
         }
         mutex_exit(&fip->fi_lock);
 
         v[0].p_type = PT_NOTE;
         v[0].p_flags = PF_R;
-        v[0].p_filesz = (sizeof (Note) * (10 + 2 * nlwp + nzomb + nfd))
+        v[0].p_filesz = (sizeof (Note) * (10 + 3 * nlwp + nzomb + nfd))
             + roundup(sizeof (psinfo_t), sizeof (Word))
             + roundup(sizeof (pstatus_t), sizeof (Word))
             + roundup(prgetprivsize(), sizeof (Word))
             + roundup(priv_get_implinfo_size(), sizeof (Word))
             + roundup(strlen(platform) + 1, sizeof (Word))

@@ -105,10 +105,11 @@
             + roundup(sizeof (utsname), sizeof (Word))
             + roundup(sizeof (core_content_t), sizeof (Word))
             + roundup(sizeof (prsecflags_t), sizeof (Word))
             + (nlwp + nzomb) * roundup(sizeof (lwpsinfo_t), sizeof (Word))
             + nlwp * roundup(sizeof (lwpstatus_t), sizeof (Word))
+            + nlwp * roundup(sizeof (prlwpname_t), sizeof (Word))
             + nfd * roundup(sizeof (prfdinfo_t), sizeof (Word));
 
         if (curproc->p_agenttp != NULL) {
                 v[0].p_filesz += sizeof (Note) +
                     roundup(sizeof (psinfo_t), sizeof (Word));

@@ -454,10 +455,11 @@
 
         nlwp = p->p_lwpcnt;
         nzomb = p->p_zombcnt;
         /* for each entry in the lwp directory ... */
         for (ldp = p->p_lwpdir; nlwp + nzomb != 0; ldp++) {
+                prlwpname_t name = { 0, };
 
                 if ((lep = ldp->ld_entry) == NULL)      /* empty slot */
                         continue;
 
                 if ((t = lep->le_thread) != NULL) {     /* active lwp */

@@ -464,10 +466,14 @@
                         ASSERT(nlwp != 0);
                         nlwp--;
                         lwp = ttolwp(t);
                         mutex_enter(&p->p_lock);
                         prgetlwpsinfo(t, &bigwad->lwpsinfo);
+                        if (t->t_name != NULL) {
+                                (void) strlcpy(name.pr_lwpname, t->t_name,
+                                    sizeof (name.pr_lwpname));
+                        }
                         mutex_exit(&p->p_lock);
                 } else {                                /* zombie lwp */
                         ASSERT(nzomb != 0);
                         nzomb--;
                         bzero(&bigwad->lwpsinfo, sizeof (bigwad->lwpsinfo));

@@ -474,15 +480,19 @@
                         bigwad->lwpsinfo.pr_lwpid = lep->le_lwpid;
                         bigwad->lwpsinfo.pr_state = SZOMB;
                         bigwad->lwpsinfo.pr_sname = 'Z';
                         bigwad->lwpsinfo.pr_start.tv_sec = lep->le_start;
                 }
+
+                name.pr_lwpid = bigwad->lwpsinfo.pr_lwpid;
+
                 error = elfnote(vp, &offset, NT_LWPSINFO,
                     sizeof (bigwad->lwpsinfo), (caddr_t)&bigwad->lwpsinfo,
                     rlimit, credp);
                 if (error)
                         goto done;
+
                 if (t == NULL)          /* nothing more to do for a zombie */
                         continue;
 
                 mutex_enter(&p->p_lock);
                 if (t == curthread) {

@@ -512,10 +522,15 @@
                     sizeof (bigwad->lwpstatus), (caddr_t)&bigwad->lwpstatus,
                     rlimit, credp);
                 if (error)
                         goto done;
 
+                if ((error = elfnote(vp, &offset, NT_LWPNAME, sizeof (name),
+                    (caddr_t)&name, rlimit, credp)) != 0)
+                        goto done;
+
+
 #if defined(__sparc)
                 /*
                  * Unspilled SPARC register windows.
                  */
                 {