Unable To FS_createPreloadedFile A File With Emsdk 1.37.16 And ALLOW_MEMORY_GROWTH

[awt]

Hi,

I tried to load an 8mb data file with FS_createPreloadedFile and Emsdk 1.37.16 And ALLOW_MEMORY_GROWTH. What I observed is that in the mmap function, we try to set to a buffer that is zero bytes in size. However, if I use TOTAL_MEMORY_GROWTH, the size of buffer will be that of what I pass to TOTAL_MEMORY_GROWTH. Is this a known issue?

mmap: (function(stream, buffer, offset, length, position, prot, flags) {

   if (!FS.isFile(stream.node.mode)) {

    throw new FS.ErrnoError(ERRNO_CODES.ENODEV);

   }

   var ptr;

   var allocated;

   var contents = stream.node.contents;

   if (!(flags & 2) && (contents.buffer === buffer || contents.buffer === buffer.buffer)) {

    allocated = false;

    ptr = contents.byteOffset;

   } else {

    if (position > 0 || position + length < stream.node.usedBytes) {

     if (contents.subarray) {

      contents = contents.subarray(position, position + length);

     } else {

      contents = Array.prototype.slice.call(contents, position, position + length);

     }

    }

    allocated = true;

    ptr = _malloc(length);

    if (!ptr) {

     throw new FS.ErrnoError(ERRNO_CODES.ENOMEM);

    }

    buffer.set(contents, ptr);

   }

   return {

    ptr: ptr,

    allocated: allocated

   };

  }),

[Jukka Jylänki]

This does not sound like anything we have encountered before. Would
you have a small test case to highlight this?

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