Add memstat_kvm_uma(), an implementation of a libmemstat(3) query routine

that knows how to extract UMA(9) allocator statistics from a core dump or
live memory image using kvm(3).  The caller is expected to provide the
necessary kvm_t handle, which is then used by libmemstat(3).

With these changes, it is trivially straight forward to re-introduce
vmstat -z support on core dumps, which was lost when UMA was introduced.

In the short term, this requires including vm/ include files that are not
intended for extra-kernel use, requiring in turn some ugliness.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libmemstat/memstat_all.c b/lib/libmemstat/memstat_all.c
index e32047c..b363ab9 100644
--- a/lib/libmemstat/memstat_all.c
+++ b/lib/libmemstat/memstat_all.c
@@ -45,3 +45,16 @@ memstat_sysctl_all(struct memory_type_list *mtlp, int flags)
 		return (-1);
 	return (0);
 }
+
+int
+memstat_kvm_all(struct memory_type_list *mtlp, void *kvm_handle)
+{
+
+#if NOTYET
+	if (memstat_kvm_malloc(mtlp, kvm_handle) < 0)
+		return (-1);
+#endif
+	if (memstat_kvm_uma(mtlp, kvm_handle) < 0)
+		return (-1);
+	return (0);
+}