[src/trunk]: src/sys/external/bsd/drm2/linux sdt dtrace probes for linux idr.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/99c045224fc9
branches:  trunk
changeset: 366372:99c045224fc9
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 15:06:54 2018 +0000

description:
sdt dtrace probes for linux idr.

diffstat:

 sys/external/bsd/drm2/linux/linux_idr.c |  29 +++++++++++++++++++++++++++--
 1 files changed, 27 insertions(+), 2 deletions(-)

diffs (109 lines):

diff -r 9003ee120b80 -r 99c045224fc9 sys/external/bsd/drm2/linux/linux_idr.c
--- a/sys/external/bsd/drm2/linux/linux_idr.c   Mon Aug 27 15:06:37 2018 +0000
+++ b/sys/external/bsd/drm2/linux/linux_idr.c   Mon Aug 27 15:06:54 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_idr.c,v 1.9 2018/08/27 14:15:45 riastradh Exp $  */
+/*     $NetBSD: linux_idr.c,v 1.10 2018/08/27 15:06:54 riastradh Exp $ */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,11 +30,12 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_idr.c,v 1.9 2018/08/27 14:15:45 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_idr.c,v 1.10 2018/08/27 15:06:54 riastradh Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
 #include <sys/rbtree.h>
+#include <sys/sdt.h>
 
 #include <linux/err.h>
 #include <linux/idr.h>
@@ -59,6 +60,18 @@
        void                    *ic_where;
 };
 
+SDT_PROBE_DEFINE0(sdt, linux, idr, leak);
+SDT_PROBE_DEFINE1(sdt, linux, idr, init, "struct idr *"/*idr*/);
+SDT_PROBE_DEFINE1(sdt, linux, idr, destroy, "struct idr *"/*idr*/);
+SDT_PROBE_DEFINE4(sdt, linux, idr, replace,
+    "struct idr *"/*idr*/, "int"/*id*/, "void *"/*odata*/, "void *"/*ndata*/);
+SDT_PROBE_DEFINE3(sdt, linux, idr, remove,
+    "struct idr *"/*idr*/, "int"/*id*/, "void *"/*data*/);
+SDT_PROBE_DEFINE0(sdt, linux, idr, preload);
+SDT_PROBE_DEFINE0(sdt, linux, idr, preload_end);
+SDT_PROBE_DEFINE3(sdt, linux, idr, alloc,
+    "struct idr *"/*idr*/, "int"/*id*/, "void *"/*data*/);
+
 static specificdata_key_t idr_cache_key __read_mostly;
 
 static void
@@ -92,6 +105,7 @@
        struct idr_cache *cache = cookie;
 
        if (cache->ic_node) {
+               SDT_PROBE0(sdt, linux, idr, leak);
                idr_cache_warning(cache);
                kmem_free(cache->ic_node, sizeof(*cache->ic_node));
        }
@@ -161,12 +175,14 @@
 
        mutex_init(&idr->idr_lock, MUTEX_DEFAULT, IPL_VM);
        rb_tree_init(&idr->idr_tree, &idr_rb_ops);
+       SDT_PROBE1(sdt, linux, idr, init,  idr);
 }
 
 void
 idr_destroy(struct idr *idr)
 {
 
+       SDT_PROBE1(sdt, linux, idr, destroy,  idr);
 #if 0                          /* XXX No rb_tree_destroy?  */
        rb_tree_destroy(&idr->idr_tree);
 #endif
@@ -226,6 +242,8 @@
        } else {
                result = node->in_data;
                node->in_data = replacement;
+               SDT_PROBE4(sdt, linux, idr, replace,
+                   idr, id, result, replacement);
        }
        mutex_spin_exit(&idr->idr_lock);
 
@@ -240,6 +258,7 @@
        mutex_spin_enter(&idr->idr_lock);
        node = rb_tree_find_node(&idr->idr_tree, &id);
        KASSERTMSG((node != NULL), "idr %p has no entry for id %d", idr, id);
+       SDT_PROBE3(sdt, linux, idr, remove,  idr, id, node->in_data);
        rb_tree_remove_node(&idr->idr_tree, node);
        mutex_spin_exit(&idr->idr_lock);
 
@@ -253,6 +272,8 @@
        struct idr_node *node;
        km_flag_t kmflag = ISSET(gfp, __GFP_WAIT) ? KM_SLEEP : KM_NOSLEEP;
 
+       SDT_PROBE0(sdt, linux, idr, preload);
+
        /* If caller asked to wait, we had better be sleepable.  */
        if (ISSET(gfp, __GFP_WAIT))
                ASSERT_SLEEPABLE();
@@ -342,6 +363,8 @@
        /* Discard the node on failure.  */
        if (id < 0)
                cache->ic_node = node;
+       else
+               SDT_PROBE3(sdt, linux, idr, alloc,  idr, id, data);
        return id;
 }
 
@@ -350,6 +373,8 @@
 {
        struct idr_cache *cache;
 
+       SDT_PROBE0(sdt, linux, idr, preload_end);
+
        /* Get the cache, or bail if it's not there.  */
        cache = lwp_getspecific(idr_cache_key);
        if (cache == NULL)