Bug 196132 – Enable IPC sending and receiving non-default-constructible types

• Component: New Bugs
• Status: RESOLVED FIXED

[Alex Christensen]

Enable IPC sending and receiving non-default-constructible types

[Alex Christensen]

Created attachment 365684 [details]
Patch

[EWS Watchlist]

Comment on attachment 365684 [details]
Patch

Attachment 365684 [details] did not pass mac-wk2-ews (mac-wk2):
Output: https://webkit-queues.webkit.org/results/11610196

Number of test failures exceeded the failure limit.

[EWS Watchlist]

Created attachment 365694 [details]
Archive of layout-test-results from ews105 for mac-highsierra-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews105  Port: mac-highsierra-wk2  Platform: Mac OS X 10.13.6

[EWS Watchlist]

Comment on attachment 365684 [details]
Patch

Attachment 365684 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: https://webkit-queues.webkit.org/results/11610091

Number of test failures exceeded the failure limit.

[EWS Watchlist]

Created attachment 365695 [details]
Archive of layout-test-results from ews124 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews124  Port: ios-simulator-wk2  Platform: Mac OS X 10.13.6

[Aakash Jain]

This patch seems to break lot of API tests.

iOS: https://ews-build.webkit-uat.org/#/builders/20/builds/2243 (94 new API Tests failures)

macOS: https://ews-build.webkit-uat.org/#/builders/19/builds/2398 (61 new API Tests failures)

If this is a false positive, please let us know.

[Aakash Jain]

Retried the builds to confirm (by clicking 'Rebuild' button on Buildbot build page). Failed again:

iOS: https://ews-build.webkit-uat.org/#/builders/20/builds/2250 (93 new API Tests failures)

mac: https://ews-build.webkit-uat.org/#/builders/19/builds/2409 (61 new API Tests failures)

If this is a false positive, please let us know.

[Alex Christensen]

Created attachment 365778 [details]
Patch

[Alex Christensen]

(In reply to Aakash Jain from comment #7)
> If this is a false positive, please let us know.
It was definitely not a false positive.  With my first patch, anything on Cocoa platforms or Windows that sent a SharedMemory::Handle would crash because the default move constructor and operator= do not zero out the moved-from object.  My second patch fixes this.

[Aakash Jain]

(In reply to Alex Christensen from comment #9)
> (In reply to Aakash Jain from comment #7)
> > If this is a false positive, please let us know.
> It was definitely not a false positive.  With my first patch, anything on Cocoa platforms or Windows that sent a SharedMemory::Handle would crash because the default move constructor and operator= do not zero out the moved-from object.
> My second patch fixes this.
Thanks. API tests pass now.

iOS: https://ews-build.webkit-uat.org/#/builders/20/builds/2281
macOS: https://ews-build.webkit-uat.org/#/builders/19/builds/2441

[Geoffrey Garen]

Comment on attachment 365778 [details]
Patch

r=me

[Alex Christensen]

http://trac.webkit.org/r243460

[Radar WebKit Bug Importer]

<rdar://problem/49229221>

[Fujii Hironori]

WinCairo port builds get broken.

https://build.webkit.org/builders/WinCairo%2064-bit%20WKL%20Debug%20%28Build%29/builds/7627

> FAILED: Source/WebKit/CMakeFiles/WebKit.dir/Platform/win/SharedMemoryWin.cpp.obj 
> "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.14.26428\bin\Hostx64\x64\cl.exe" (...) -c ..\..\Source\WebKit\Platform\win\SharedMemoryWin.cpp
> C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.14.26428\include\utility(688): error C2440: '=': cannot convert from 'int' to 'HANDLE '
> C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.14.26428\include\utility(688): note: Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
> ..\..\Source\WebKit\Platform\win\SharedMemoryWin.cpp(44): note: see reference to function template instantiation '_Ty *std::exchange<HANDLE,int>(_Ty &,_Other &&)' being compiled
>         with
>         [
>             _Ty=HANDLE,
>             _Other=int
>         ]

[Fujii Hironori]

Committed r243479: <https://trac.webkit.org/changeset/243479>

[Alex Christensen]

It's interesting that the constructor on line 37 worked but operator= did not.

[Fujii Hironori]

Yeah. But, GCC and Clang also can't compile.
https://godbolt.org/z/Rz_fVO