Allow memory size of 2GB

src/browser/lib.js

@@ -21,6 +21,8 @@ var ASYNC_SAFE = false;
     // Reads len characters at offset from Memory object mem as a JS string
     v86util.read_sized_string_from_mem = function read_sized_string_from_mem(mem, offset, len)
     {
+        offset >>>= 0;
+        len >>>= 0;
         return String.fromCharCode(...new Uint8Array(mem.buffer, offset, len));
     };
 

src/cpu.js

@@ -1324,6 +1324,9 @@ var seen_code_uncompiled = {};
 
 CPU.prototype.codegen_finalize = function(wasm_table_index, start, state_flags, ptr, len)
 {
+    ptr >>>= 0;
+    len >>>= 0;
+
     dbg_assert(wasm_table_index >= 0 && wasm_table_index < WASM_TABLE_SIZE);
 
     const code = new Uint8Array(this.wm.instance.exports.memory.buffer, ptr, len);