Bug 217163 – REGRESSION(r267763) [SOUP] Some tests flaky crashing in NetworkSessionSoup::soupSession()

• Component: WebRTC
• Status: RESOLVED FIXED

[Lauro Moura]

Created attachment 410196 [details]
webrtc/missing-exception-checks-RTCPeerConnection-generateCertificate.html Crash log

Some tests affected after r267763

fast/mediastream/RTCPeerConnection-media-setup-single-dialog.html
fast/mediastream/RTCPeerConnection-media-setup-two-dialogs.html
webrtc/missing-exception-checks-RTCPeerConnection-generateCertificate.html
fast/mediastream/RTCPeerConnection-overloaded-operations.html

Regarding this last one, I could not reproduce it locally and the bots aren't generating the crash dump like the others.

Snippet of the trace (full one attached):

Thread 1 (Thread 0x7fc97a6f79c0 (LWP 2953)):
#0  0x00007fc9837868d0 in WebKit::NetworkSessionSoup::soupSession() const () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#1  0x00007fc98540b3d6 in WebCore::DNSResolveQueueSoup::resolve(WTF::String const&, unsigned long, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::Vector<WebCore::IPAddress, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>, WebCore::DNSError>&&)>&&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#2  0x00007fc9837a571b in WebKit::NetworkRTCProvider::createResolver(WTF::ObjectIdentifier<WebKit::LibWebRTCResolverIdentifierType>, WTF::String&&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#3  0x00007fc981128778 in WTF::RunLoop::performWork() () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#4  0x00007fc98118ae99 in WTF::RunLoop::RunLoop()::{lambda(void*)#1}::_FUN(void*) () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#5  0x00007fc98118b84f in WTF::RunLoop::{lambda(_GSource*, int (*)(void*), void*)#1}::_FUN(_GSource*, int (*)(void*), void*) () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#6  0x00007fc97ca7e04f in g_main_dispatch (context=0x562a17a350e0) at ../glib/gmain.c:3325
#7  g_main_context_dispatch (context=0x562a17a350e0) at ../glib/gmain.c:4016
#8  0x00007fc97ca7e3f8 in g_main_context_iterate (context=0x562a17a350e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4092
#9  0x00007fc97ca7e713 in g_main_loop_run (loop=0x562a17a36200) at ../glib/gmain.c:4290
#10 0x00007fc98118b998 in WTF::RunLoop::run() () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#11 0x00007fc98378996c in WebKit::NetworkProcessMain(int, char**) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#12 0x00007fc97b610022 in __libc_start_main (main=0x562a15f0ebe0 <main>, argc=3, argv=0x7ffe586a4338, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe586a4328) at ../csu/libc-start.c:308
#13 0x0000562a15f0ec5e in _start () at ../sysdeps/x86_64/start.S:120

[Carlos Garcia Campos]

I have to fix the DNS resolver.

[Lauro Moura]

For completeness, the test below is also flaky crashing with the same trace (had to check locally, the bot was not generating trace for it).

fast/mediastream/RTCPeerConnection-onnegotiationneeded.html

[Carlos Garcia Campos]

Created attachment 410508 [details]
Patch

[Carlos Garcia Campos]

Created attachment 410509 [details]
Patch

[EWS]

Committed r267999: <https://trac.webkit.org/changeset/267999>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 410509 [details].

[Radar WebKit Bug Importer]

<rdar://problem/69968509>