223650 2021-03-23 12:12:40 -0700 DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:802:72: runtime error: -1 is outside the range of representable values of type 'unsigned int' 2021-03-24 13:06:14 -0700 1 1 1 Unclassified WebKit Bindings WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=176131 https://bugs.webkit.org/show_bug.cgi?id=223710 InRadar P2 Normal --- 1 cdumez cdumez benjamin cdumez cmarcelo darin ews-watchlist ggaren sam webkit-bug-importer oldest_to_newest 1742939 0 cdumez 2021-03-23 12:12:40 -0700 DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:802:72: runtime error: -1 is outside the range of representable values of type 'unsigned int'. 1742949 1 424049 cdumez 2021-03-23 12:25:36 -0700 Created attachment 424049 Patch 1742958 2 cdumez 2021-03-23 12:36:33 -0700 1 Release/DerivedSources/WebKitTestRunner/JSEventSendingController.cpp:274:45: runtime error: nan is outside the range of representable values of type 'int' 1 Release/DerivedSources/WebKitTestRunner/JSEventSendingController.cpp:130:23: runtime error: nan is outside the range of representable values of type 'int' 1 Release/DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:802:72: runtime error: -1 is outside the range of representable values of type 'unsigned int' 1 Release/DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:802:64: runtime error: -1 is outside the range of representable values of type 'unsigned int' 1 Release/DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:1571:63: runtime error: 1e+11 is outside the range of representable values of type 'int' 1 Release/DerivedSources/WebKitTestRunner/JSAccessibilityUIElement.cpp:1221:67: runtime error: -1 is outside the range of representable values of type 'unsigned int' 1742985 3 darin 2021-03-23 13:37:42 -0700 What does clampTo do for NaN? Is there any downside to silently clamping instead of doing something like raising an exception? 1742989 4 cdumez 2021-03-23 13:49:48 -0700 (In reply to Darin Adler from comment #3) > What does clampTo do for NaN? Is there any downside to silently clamping > instead of doing something like raising an exception? I will check what it does for NaN, I am not sure. Previously, I believe it was undefined behavior to cast NaN to an integer type. About clamping vs throwing an exception, I guess we can do whatever we decide to, since this is used only by layout tests. I went this way because it was a bit less work and basically as permissive as it used to be. 1743008 5 cdumez 2021-03-23 14:26:49 -0700 (In reply to Chris Dumez from comment #4) > (In reply to Darin Adler from comment #3) > > What does clampTo do for NaN? Is there any downside to silently clamping > > instead of doing something like raising an exception? > > I will check what it does for NaN, I am not sure. Previously, I believe it > was undefined behavior to cast NaN to an integer type. We seem to be calling: // Floating point source. template<typename TargetType, typename SourceType> typename std::enable_if<!std::is_same<TargetType, SourceType>::value && std::is_floating_point<SourceType>::value && !(std::is_floating_point<TargetType>::value && sizeof(TargetType) > sizeof(SourceType)), TargetType>::type clampTo(SourceType value, TargetType min = defaultMinimumForClamp<TargetType>(), TargetType max = defaultMaximumForClamp<TargetType>()) { if (value >= static_cast<SourceType>(max)) return max; if (value <= static_cast<SourceType>(min)) return min; return static_cast<TargetType>(value); } If value is NaN, then I'd expect both if checks to fail and we'd static_cast<> to the destination type, which I believe would still be undefined behavior for integer destination types. We may need to update std::clampTo() to handle NaN. Looks like the default behavior for WebIDL is: "If x is NaN, +0, +∞, or −∞, then return +0." 1743016 6 424067 cdumez 2021-03-23 14:45:40 -0700 Created attachment 424067 Patch 1743025 7 darin 2021-03-23 15:03:12 -0700 We should consider fixing clampTo so that it returns "min" when NaN is passed instead of returning "value". I think we can do that efficiently. Could be as simple as: if (!(value > static_cast<SourceType>(min))) return min; Instead of the "<=" version. That might fix it. 1743033 8 cdumez 2021-03-23 15:23:37 -0700 (In reply to Darin Adler from comment #7) > We should consider fixing clampTo so that it returns "min" when NaN is > passed instead of returning "value". I think we can do that efficiently. > Could be as simple as: > > if (!(value > static_cast<SourceType>(min))) > return min; > > Instead of the "<=" version. That might fix it. I had a slight preference for 0 but I guess it doesn't really matter. At least your way avoids an extra branch. I'll update the patch accordingly and add API tests. 1743034 9 darin 2021-03-23 15:25:39 -0700 Yes, I see your point. 0 would be nicer. 1743035 10 darin 2021-03-23 15:26:42 -0700 But maybe 0 isn’t even between min and max, so we’d want to convert to 0 before doing the min/max checks. 1743037 11 cdumez 2021-03-23 15:29:36 -0700 (In reply to Darin Adler from comment #10) > But maybe 0 isn’t even between min and max, so we’d want to convert to 0 > before doing the min/max checks. Yes, that is what my patch was doing: ``` if (std::isnan(value)) value = 0; if (value >= max) return max; [...] ``` 1743038 12 424074 cdumez 2021-03-23 15:31:47 -0700 Created attachment 424074 Patch 1743039 13 cdumez 2021-03-23 15:32:33 -0700 (In reply to Chris Dumez from comment #12) > Created attachment 424074 [details] > Patch This version returns min as you initially suggested and adds API test coverage. I can easily switch to 0 (then clamped to range) if you'd prefer. 1743089 14 ews-feeder 2021-03-23 17:30:18 -0700 Committed r274919: <https://commits.webkit.org/r274919> All reviewed patches have been landed. Closing bug and clearing flags on attachment 424074. 1743090 15 webkit-bug-importer 2021-03-23 17:31:15 -0700 <rdar://problem/75763224> 424049 2021-03-23 12:25:36 -0700 2021-03-23 14:45:38 -0700 Patch bug-223650-20210323122535.patch text/plain 4909 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjc0ODcxCmRpZmYgLS1naXQgYS9Ub29scy9DaGFuZ2VMb2cg Yi9Ub29scy9DaGFuZ2VMb2cKaW5kZXggZWI3M2I4ZmI2ZDA5MmE0MTY3YWRlMDUwYmI3NGE3Yzdl MDMzYzQ1NS4uNmViNGVhNTI1YjZhMWU1ZmQ2NTdmNjEyNWYzMWRiYTdiZjhhZTMwMiAxMDA2NDQK LS0tIGEvVG9vbHMvQ2hhbmdlTG9nCisrKyBiL1Rvb2xzL0NoYW5nZUxvZwpAQCAtMSwzICsxLDI1 IEBACisyMDIxLTAzLTIzICBDaHJpcyBEdW1leiAgPGNkdW1lekBhcHBsZS5jb20+CisKKyAgICAg ICAgRGVyaXZlZFNvdXJjZXMvV2ViS2l0VGVzdFJ1bm5lci9KU0FjY2Vzc2liaWxpdHlVSUVsZW1l bnQuY3BwOjgwMjo3MjogcnVudGltZSBlcnJvcjogLTEgaXMgb3V0c2lkZSB0aGUgcmFuZ2Ugb2Yg cmVwcmVzZW50YWJsZSB2YWx1ZXMgb2YgdHlwZSAndW5zaWduZWQgaW50JworICAgICAgICBodHRw czovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjIzNjUwCisKKyAgICAgICAgUmV2 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