[pypy-commit] stmgc default: Add some more debugging prints

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r74:3a3dfae01632
Date: 2013-06-05 18:48 +0200
http://bitbucket.org/pypy/stmgc/changeset/3a3dfae01632/

Log:	Add some more debugging prints

diff --git a/c3/et.c b/c3/et.c
--- a/c3/et.c
+++ b/c3/et.c
@@ -85,9 +85,10 @@
 }
 #endif
 
-gcptr stm_DirectReadBarrier(gcptr P)
+gcptr stm_DirectReadBarrier(gcptr G)
 {
   struct tx_descriptor *d = thread_descriptor;
+  gcptr P = G;
 
   if (P->h_tid & GCFLAG_PUBLIC)
     {
@@ -111,7 +112,10 @@
 
           /* if we land on a P in read_barrier_cache: just return it */
           if (FXCACHE_AT(P) == P)
-            return P;
+            {
+              fprintf(stderr, "read_barrier: %p -> %p fxcache\n", G, P);
+              return P;
+            }
 
           v = ACCESS_ONCE(P->h_revision);
           if (!(v & 1))  // "is a pointer", i.e.
@@ -137,6 +141,7 @@
           P = item->val;
           assert(!(P->h_tid & GCFLAG_PUBLIC));
           assert(P->h_revision == stm_private_rev_num);
+          fprintf(stderr, "read_barrier: %p -> %p public_to_private\n", G, P);
           return P;
         }
     no_private_obj:
@@ -151,6 +156,11 @@
           ValidateNow(d);                  // try to move start_time forward
           goto retry;                      // restart searching from P
         }
+      fprintf(stderr, "read_barrier: %p -> %p public\n", G, P);
+    }
+  else
+    {
+      fprintf(stderr, "read_barrier: %p -> %p protected\n", G, P);
     }
   fxcache_add(&d->recent_reads_cache, P);
   gcptrlist_insert(&d->list_of_read_objects, P);