178946 2017-10-27 10:43:15 -0700 WebAssembly: update arbitrary limits to what browsers use 2017-10-27 11:42:32 -0700 1 1 1 Unclassified WebKit WebAssembly WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 jfbastien jfbastien commit-queue fpizlo jfbastien keith_miller mark.lam msaboff rmorisset saam webkit-bug-importer oldest_to_newest 1365428 0 jfbastien 2017-10-27 10:43:15 -0700 https://github.com/WebAssembly/design/issues/1138 discusses the arbitrary function size limit, which it turns out Chrome and Firefox didn't enforce. We didn't use it because it was ridiculously low and actual programs ran into that limit (bummer for Edge which just shipped it...). Now that we agree on a high arbitrary program limit, let's update it! While I'm doing this there are a few other spots that I'd polish. 1365432 1 jfbastien 2017-10-27 10:46:16 -0700 <rdar://problem/34257412> 1365433 2 jfbastien 2017-10-27 10:46:27 -0700 <rdar://problem/34501154> 1365436 3 325177 jfbastien 2017-10-27 10:49:31 -0700 Created attachment 325177 patch 1365439 4 325177 saam 2017-10-27 10:58:12 -0700 Comment on attachment 325177 patch View in context: https://bugs.webkit.org/attachment.cgi?id=325177&action=review > Source/JavaScriptCore/wasm/WasmB3IRGenerator.cpp:514 > + size_t totalBytes = m_locals.size() + count; Don't you want this to be Checked? > Source/JavaScriptCore/wasm/WasmB3IRGenerator.cpp:515 > + WASM_COMPILE_FAIL_IF((static_cast<uint32_t>(totalBytes) < count) || !m_locals.tryReserveCapacity(totalBytes), "can't allocate memory for ", totalBytes, " locals"); Why not use Checked? > Source/JavaScriptCore/wasm/WasmFormat.cpp:41 > + size_t totalBytes = sizeof(Segment) + sizeInBytes; > + if (static_cast<uint32_t>(totalBytes) < sizeInBytes) > + return nullptr; Why not use checked<uint32_t>? > Source/JavaScriptCore/wasm/js/JSWebAssemblyTable.cpp:65 > + m_jsFunctions = MallocPtr<WriteBarrier<JSObject>>::malloc((sizeof(WriteBarrier<JSObject>) * Checked<size_t>(size())).unsafeGet()); why? 1365445 5 325180 jfbastien 2017-10-27 11:23:05 -0700 Created attachment 325180 patch Address comments. 1365450 6 325180 commit-queue 2017-10-27 11:42:31 -0700 Comment on attachment 325180 patch Clearing flags on attachment: 325180 Committed r224122: <https://trac.webkit.org/changeset/224122> 1365451 7 commit-queue 2017-10-27 11:42:32 -0700 All reviewed patches have been landed. Closing bug. 325177 2017-10-27 10:49:31 -0700 2017-10-27 11:23:05 -0700 patch 0001-WebAssembly-update-arbitrary-limits-to-what-browsers.patch text/plain 13912 jfbastien RnJvbSA4MDcwMzkyODI2MmMzN2Q3ODA5ZGU4ZjY4OTljZmI3MzdjYmUwMDg2IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBKRiBCYXN0aWVuIDxqZmJhc3RpZW5AYXBwbGUuY29tPgpEYXRl OiBGcmksIDI3IE9jdCAyMDE3IDEwOjQ5OjA1IC0wNzAwClN1YmplY3Q6IFtQQVRDSF0gV2ViQXNz ZW1ibHk6IHVwZGF0ZSBhcmJpdHJhcnkgbGltaXRzIHRvIHdoYXQgYnJvd3NlcnMgdXNlCgotLS0K IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cgICAgICAgICAgICAgICAgICAgIHwgMzgg KysrKysrKysrKysrKysrKysrKysrKwogU291cmNlL0phdmFTY3JpcHRDb3JlL3dhc20vV2FzbUIz SVJHZW5lcmF0b3IuY3BwICAgfCAgMyArLQogU291cmNlL0phdmFTY3JpcHRDb3JlL3dhc20vV2Fz bUZvcm1hdC5jcHAgICAgICAgICAgfCAgNSArKy0KIFNvdXJjZS9KYXZhU2NyaXB0Q29yZS93YXNt L1dhc21GdW5jdGlvblBhcnNlci5oICAgIHwgIDQgKy0tCiBTb3VyY2UvSmF2YVNjcmlwdENvcmUv d2FzbS9XYXNtSW5zdGFuY2UuY3BwICAgICAgICB8ICA3ICsrLS0KIFNvdXJjZS9KYXZhU2NyaXB0 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