Do not use prctl to name Virt mem on Mac

Author: shravanrn

CMakeLists.txt

@@ -7,7 +7,7 @@ project(rlbox_wasm2c
 
 # Project Settings ###################
 
-# set(CMAKE_VERBOSE_MAKEFILE ON)
+# set(CMAKE_VERBOSE_MAKEFILE wasm2c: support the custom-page-sizes proposal #2508  ON)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
@@ -122,7 +122,7 @@ endif()
 FetchContent_Declare(
   mod_wasm2c
   GIT_REPOSITORY https://github.com/WebAssembly/wabt/
-  GIT_TAG main)
+  GIT_TAG 40be47dbfceea07951325dd2197a96c74d8c77a8)
 FetchContent_GetProperties(mod_wasm2c)
 if(NOT mod_wasm2c_POPULATED)
   FetchContent_Populate(mod_wasm2c)

src/wasm2c_rt_mem.c

@@ -315,7 +315,9 @@ static int os_mmap_commit(void* curr_heap_end_pointer,
 
 #  include <sys/mman.h>
 #  include <unistd.h>
+#if !(defined(__APPLE__) && defined(__MACH__))
 #  include <sys/prctl.h>
+#endif
 
 // These constants are copied from <sys/prctl.h>, because the headers
 // used for building may not have them even though the running kernel
@@ -429,12 +431,14 @@ static void* os_mmap_aligned(void* addr,
     }
   }
 
+#if !(defined(__APPLE__) && defined(__MACH__))
   if (name) {
     // Ignore errors here as this is best effort
     prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME,
       (unsigned long)aligned, requested_length,
       (unsigned long)name);
   }
+#endif
 
   return (void*)aligned;
 }