Merge pull request #6341 from notoraptor/fix-segfault-with-dnn-conv

theano/gof/cc.py

@@ -299,7 +299,9 @@ def struct_gen(args, struct_builders, blocks, sub):
             // now I am tired of chasing segfaults because
             // initialization code had an error and some pointer has
             // a junk value.
+            #ifndef THEANO_DONT_MEMSET_STRUCT
             memset(this, 0, sizeof(*this));
+            #endif
         }
         ~%(name)s(void) {
             cleanup();

theano/gpuarray/c_code/dnn_fwd.c

@@ -9,6 +9,9 @@ hash_prefix = std::string("FWD|GPU#");
 int     reuse_algo;
 AlgoRec prev_algo;
 std::string hash_prefix;
+
+#define THEANO_DONT_MEMSET_STRUCT
+
 #ifdef DEBUG
 char algorithm_name[128];
 #endif

theano/gpuarray/c_code/dnn_gi.c

@@ -9,6 +9,9 @@ hash_prefix = std::string("GI|GPU#");
 int     reuse_algo;
 AlgoRec prev_algo;
 std::string hash_prefix;
+
+#define THEANO_DONT_MEMSET_STRUCT
+
 #ifdef DEBUG
 char algorithm_name[128];
 #endif

theano/gpuarray/c_code/dnn_gw.c

@@ -9,6 +9,9 @@ hash_prefix = std::string("GW|GPU#");
 int     reuse_algo;
 AlgoRec prev_algo;
 std::string hash_prefix;
+
+#define THEANO_DONT_MEMSET_STRUCT
+
 #ifdef DEBUG
 char algorithm_name[128];
 #endif