{"action":"created","comment":{"url":"https://api.github.com/repos/WebAssembly/design/pulls/comments/46066189","id":46066189,"diff_hunk":"@@ -140,6 +140,14 @@ The linear memory section may also contain an optional hint declaring the expect\n maximum heap usage. This hint is not semantically visible but can help a\n WebAssembly engine to optimize `grow_memory`.\n \n+The linear memory section may optionally declare that the instance's\n+linear memory is *externally aliasable*. How linear memory is aliased is up\n+to the host environment (as with all module exports). The \n+[Web](Web.md#aliasing-linear-memory-from-JS) would reflect exported linear\n+memory to JS as an `ArrayBuffer`. The MVP does not currently provide for\n+*importing* linear memory though this may be added \n+[in the future](FutureFeatures.md#importing-linear-memory).","path":"Modules.md","position":10,"original_position":10,"commit_id":"c9d9e53362e57d0879df3d6451f51f63b8cd7833","original_commit_id":"c9d9e53362e57d0879df3d6451f51f63b8cd7833","user":{"login":"lukewagner","id":9660325,"avatar_url":"https://avatars.githubusercontent.com/u/9660325?v=3","gravatar_id":"","url":"https://api.github.com/users/lukewagner","html_url":"https://github.com/lukewagner","followers_url":"https://api.github.com/users/lukewagner/followers","following_url":"https://api.github.com/users/lukewagner/following{/other_user}","gists_url":"https://api.github.com/users/lukewagner/gists{/gist_id}","starred_url":"https://api.github.com/users/lukewagner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lukewagner/subscriptions","organizations_url":"https://api.github.com/users/lukewagner/orgs","repos_url":"https://api.github.com/users/lukewagner/repos","events_url":"https://api.github.com/users/lukewagner/events{/privacy}","received_events_url":"https://api.github.com/users/lukewagner/received_events","type":"User","site_admin":false},"body":"I'm having trouble understanding your specific concern.  At the top you mention wasm+SAB interactions but then the rest of your comment seems to be general memory model concerns that are not specific to SAB.  There are some real concerns about resize+mprotect/SAB interactions outlined in Web.md, but those are quite different than what you're talking about here.  Moreover, we have agreed that, because threads (not just SAB interactions) are such a cross-cutting concern, that we should have a good experimental prototype up and working before v.1 is finished; that's #104.  So I'm not sure what specifically goes in a new issue.","created_at":"2015-11-27T18:46:29Z","updated_at":"2015-11-27T18:46:29Z","html_url":"https://github.com/WebAssembly/design/pull/455#discussion_r46066189","pull_request_url":"https://api.github.com/repos/WebAssembly/design/pulls/455","_links":{"self":{"href":"https://api.github.com/repos/WebAssembly/design/pulls/comments/46066189"},"html":{"href":"https://github.com/WebAssembly/design/pull/455#discussion_r46066189"},"pull_request":{"href":"https://api.github.com/repos/WebAssembly/design/pulls/455"}}},"pull_request":{"url":"https://api.github.com/repos/WebAssembly/design/pulls/455","id":50157494,"html_url":"https://github.com/WebAssembly/design/pull/455","diff_url":"https://github.com/WebAssembly/design/pull/455.diff","patch_url":"https://github.com/WebAssembly/design/pull/455.patch","issue_url":"https://api.github.com/repos/WebAssembly/design/issues/455","number":455,"state":"open","locked":false,"title":"Refine linear memory 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WebAssembly in Web.md to reflect more recent discussions concerning the hazards of resizing, `mprotect` and threads.\r\n\r\nHeap *exports* also begs the question of heap *imports* which this PR takes the liberty of adding to FutureFeatures.md.","created_at":"2015-11-09T18:16:44Z","updated_at":"2015-11-27T18:46:29Z","closed_at":null,"merged_at":null,"merge_commit_sha":"a65aa9cfe88ada27419af6fede4954d2e7f6310f","assignee":null,"milestone":{"url":"https://api.github.com/repos/WebAssembly/design/milestones/2","html_url":"https://github.com/WebAssembly/design/milestones/MVP","labels_url":"https://api.github.com/repos/WebAssembly/design/milestones/2/labels","id":1138963,"number":2,"title":"MVP","description":"See [here](https://github.com/WebAssembly/design/blob/master/MVP.md) for 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