Add zalloc, convert a bunch of files to use it

2 files changed, 3 insertions, 4 deletions

diff --git a/src/core/lib/transport/metadata.c b/src/core/lib/transport/metadata.c
index 489c20cbc8..f2417d8c4e 100644
--- a/src/core/lib/transport/metadata.c
+++ b/src/core/lib/transport/metadata.c
@@ -130,8 +130,7 @@ void grpc_mdctx_global_init(void) {
     shard->count = 0;
     gpr_atm_no_barrier_store(&shard->free_estimate, 0);
     shard->capacity = INITIAL_SHARD_CAPACITY;
-    shard->elems = gpr_malloc(sizeof(*shard->elems) * shard->capacity);
-    memset(shard->elems, 0, sizeof(*shard->elems) * shard->capacity);
+    shard->elems = gpr_zalloc(sizeof(*shard->elems) * shard->capacity);
   }
 }
 
@@ -216,8 +215,7 @@ static void grow_mdtab(mdtab_shard *shard) {
 
   GPR_TIMER_BEGIN("grow_mdtab", 0);
 
-  mdtab = gpr_malloc(sizeof(interned_metadata *) * capacity);
-  memset(mdtab, 0, sizeof(interned_metadata *) * capacity);
+  mdtab = gpr_zalloc(sizeof(interned_metadata *) * capacity);
 
   for (i = 0; i < shard->capacity; i++) {
     for (md = shard->elems[i]; md; md = next) {
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index 9a0abe1ca4..f2dbb891b2 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -213,6 +213,7 @@ size_t grpc_transport_stream_size(grpc_transport *transport);
 /* Initialize transport data for a stream.
 
    Returns 0 on success, any other (transport-defined) value for failure.
+   May assume that stream contains all-zeros.
 
    Arguments:
      transport   - the transport on which to create this stream