Migrate some more things

Author: camelid

src/common.h

@@ -150,7 +150,7 @@ static constexpr std::chrono::milliseconds kZeroMs{0};
 static constexpr std::chrono::milliseconds kMeshPeriodMs{100};  // 100 ms
 
 // controls aspects of miniheaps
-static constexpr size_t kMaxMeshes = 256;  // 1 per bit
+static constexpr size_t kMaxMeshes = kMaxShuffleVectorLength;  // 1 per bit
 #ifdef __APPLE__
 static constexpr size_t kArenaSize = 32ULL * 1024ULL * 1024ULL * 1024ULL;  // 16 GB
 #else

src/global_heap.cc

@@ -505,7 +505,7 @@ shiftedSplitting(MWC &prng, MiniHeapListEntry *miniheaps, SplitArray &left, Spli
     return;
   }
 
-  constexpr size_t nBytes = 32;
+  constexpr size_t nBytes = kMaxShuffleVectorLength / 8;
   const size_t limit = rightSize < t ? rightSize : t;
   d_assert(nBytes == left[0]->bitmap().byteCount());
 

src/mac_wrapper.cc

@@ -306,6 +306,7 @@ MESH_EXPORT void replace_malloc_destroy_zone(malloc_zone_t *) {
 MESH_EXPORT kern_return_t replace_malloc_get_all_zones(task_t, memory_reader_t, vm_address_t **addresses,
                                                        unsigned *count) {
   *addresses = 0;
+  // FIXME: this produces a warning by clang, so maybe this should have a *?
   count = 0;
   return KERN_SUCCESS;
 }