diff --git a/gdb-macros b/gdb-macros
new file mode 100644
index 0000000..2b5419f
--- /dev/null
+++ b/gdb-macros
@@ -0,0 +1,117 @@
+# vim:ft=gdb:ts=2:sw=2:et:
+
+set $UMF_AUDIT = 1
+set $UMF_DEADBEEF = 2
+set $UMF_REDZONE = 4
+set $UMF_CONTENTS = 8
+set $UMF_CHECKSIGNAL = 16
+set $UMF_NOMAGAZINE = 32
+set $UMF_FIREWALL = 64
+set $UMF_LITE = 128
+set $UMF_HASH = 256
+set $UMF_RANDOMIZE = 512
+
+define umastat_cache
+  set $cp = $arg0
+  set $meminuse = ($cp->cache_slab_create - $cp->cache_slab_destroy) * $cp->cache_slabsize
+
+  if (($cp->cache_cpu[0].cc_magsize != 0) || ($cp->cache_flags & $UMF_NOMAGAZINE))
+    set $magsize = $cp->cache_cpu[0].cc_magsize
+  else
+    set $magsize = $cp->cache_magtype->mt_magsize
+  end
+  
+  set $alloc = $cp->cache_slab_alloc + $cp->cache_full.ml_alloc
+  set $avail = $cp->cache_full.ml_total * $magsize
+  set $total = $cp->cache_buftotal
+
+  # walk the cpu caches
+  set $cpu_current = 0
+  while $cpu_current < umem_max_ncpus
+    set $cpu = umem_cpus[$cpu_current]
+    set $cpu_cache = (umem_cpu_cache_t*)((char*)$cp + $cpu->cpu_cache_offset)
+
+    if $cpu_cache->cc_rounds > 0
+      set $avail = $avail + $cpu_cache->cc_rounds
+    end
+    if $cpu_cache->cc_prounds > 0
+      set $avail = $avail + $cpu_cache->cc_prounds
+    end
+    set $alloc = $alloc + $cpu_cache->cc_alloc
+    
+    set $cpu_current = $cpu_current + 1
+  end
+
+  # walk some slabs
+  set $slab = $cp->cache_nullslab.slab_next
+  while $slab != &$cp->cache_nullslab
+    set $avail = $avail + $slab->slab_chunks - $slab->slab_refcnt
+    set $slab = $slab->slab_next 
+  end
+
+  printf "%-25s    %6u %6u %6u %9u %9u %5llu\n", $cp->cache_name, $cp->cache_bufsize, $total - $avail, $total, $meminuse, $alloc, $cp->cache_alloc_fail
+end
+
+document umastat
+  umem allocator stats
+end
+
+define umastat
+  printf "cache                        buf    buf    buf    memory        alloc alloc\n"
+  printf "name                         size   in use total  in use      succeed  fail\n"
+  printf "---------------------------- ------ ------ ------ --------- --------- -----\n"
+  set $cp = umem_null_cache->cache_next
+  while $cp != &umem_null_cache
+    umastat_cache $cp
+    set $cp = $cp->cache_next
+  end
+  printf "---------------------------- ------ ------ ------ --------- --------- -----\n"
+  set $vmem = vmem_list
+  while $vmem != 0
+    set $meminuse = 0
+    set $alloc = 0
+    set $fail = 0
+    set $cp = umem_null_cache->cache_next
+    while $cp != &umem_null_cache
+      if $cp->cache_arena == $vmem
+        set $meminuse = $meminuse + (($cp->cache_slab_create - $cp->cache_slab_destroy) * $cp->cache_slabsize)
+
+        if (($cp->cache_cpu[0].cc_magsize != 0) || ($cp->cache_flags & $UMF_NOMAGAZINE))
+          set $magsize = $cp->cache_cpu[0].cc_magsize
+        else
+          set $magsize = $cp->cache_magtype->mt_magsize
+        end
+  
+        set $alloc = $alloc + ($cp->cache_slab_alloc + $cp->cache_full.ml_alloc)
+        set $avail = $avail + ($cp->cache_full.ml_total * $magsize)
+      end
+      set $cp = $cp->cache_next
+    end
+    printf "Total %-25s                   %9u %9u %5u\n", $vmem->vm_name, $meminuse, $alloc, $fail 
+    set $vmem = $vmem->vm_next
+  end
+end
+
+define umem_status
+  printf "Concurrency:\t%d\n", umem_max_ncpus 
+  printf "Logs\t\t"
+  if umem_transaction_log != 0
+    printf "transaction=%d ", umem_transaction_log->lh_chunksize * umem_transaction_log->lh_nchunks
+  end
+  if umem_content_log != 0
+    printf "content=%d ", umem_content_log->lh_chunksize * umem_content_log->lh_nchunks
+  end
+  if umem_failure_log != 0
+    printf "fail=%d ", umem_failure_log->lh_chunksize * umem_failure_log->lh_nchunks
+  end
+  if umem_slab_log != 0
+    printf "slab=%d ", umem_slab_log->lh_chunksize * umem_slab_log->lh_nchunks
+  end
+  if umem_logging == 0
+    printf "(inactive)"
+  end
+  printf "\nMessage buffer:\n"
+  set $msg = &umem_error_buffer + umem_error_begin
+  printf "%s", $msg
+end
+