diff options
Diffstat (limited to 'src/js/wasm.js-post.js')
| -rw-r--r-- | src/js/wasm.js-post.js | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/js/wasm.js-post.js b/src/js/wasm.js-post.js index 75a91d4d4..526d10455 100644 --- a/src/js/wasm.js-post.js +++ b/src/js/wasm.js-post.js @@ -55,14 +55,16 @@ function integrateWasmJS(Module) { function mergeMemory(newBuffer) { // The wasm instance creates its memory. But static init code might have written to - // buffer already, and we must copy it over in a proper merge. + // buffer already, including the mem init file, and we must copy it over in a proper merge. + // TODO: support memory segments in the wasm module itself, but even so, we'd still + // have other static init code. but then we could reuse STATIC_BASE..STATIC_BASE+STATIC_BUMP // TODO: avoid this copy, by avoiding such static init writes // TODO: in shorter term, just copy up to the last static init write var oldBuffer = Module['buffer']; assert(newBuffer.byteLength >= oldBuffer.byteLength, 'we might fail if we allocated more than TOTAL_MEMORY'); - // the wasm module does write out the memory initialization, in range STATIC_BASE..STATIC_BUMP, so avoid that - (new Int8Array(newBuffer).subarray(0, STATIC_BASE)).set(new Int8Array(oldBuffer).subarray(0, STATIC_BASE)); - (new Int8Array(newBuffer).subarray(STATIC_BASE + STATIC_BUMP)).set(new Int8Array(oldBuffer).subarray(STATIC_BASE + STATIC_BUMP)); + var oldView = new Int8Array(oldBuffer); + var newView = new Int8Array(newBuffer); + newView.set(oldView); updateGlobalBuffer(newBuffer); updateGlobalBufferViews(); Module['reallocBuffer'] = function(size) { |