Embedded v8 in Android: crash when executing persistent Function in another thread

Kevin Read

unread,

Nov 10, 2016, 6:14:09 AM11/10/16

to v8-users

Hi all,

I'm in the process of porting my embedded v8 from a very old version to current stable. I have this code that is called from JNI from a different thread than the one that initially created the Isolate and the initial context:

v8::Locker l (isolate);

Isolate::Scope isolateScope(isolate);

Context::Scope context_scope(*reinterpret_cast<Local<Context>*>(context->_context));

HandleScope scope (isolate);

TryCatch trycatch;

// Get pointers to persistent objects created by 'new Persistent<T>(_local)'

WrapPersistentObj* wo = (WrapPersistentObj*)thisPtr;

Local<Object> thisObj = (*reinterpret_cast<Local<Object>*>(&wo->obj));

WrapPersistentFunc* ws = (WrapPersistentFunc*)jsCbPtr;

Local<Function> callbackP = Local<Function>::New(isolate, *reinterpret_cast<Local<Function>*>(&ws->callbackFunc));

int argcount = 0;

Handle<Value> argarray[] = { };

Handle<Value> result = callbackP->Call(thisObj, argcount, argarray);

The Call method crashes with this message in debug build (doesn't crash in release build):

11-10 12:08:25.665 32122 32162 v8 E #

11-10 12:08:25.665 32122 32162 v8 E # Fatal error in ../../src/parsing/parser.cc, line 730

11-10 12:08:25.665 32122 32162 v8 E #

11-10 12:08:25.665 32122 32162 v8 E Check failed: ThreadId::Current().Equals(info->isolate()->thread_id()).

11-10 12:08:25.665 32122 32162 v8 E #

11-10 12:08:25.667 32122 32162 libc F Fatal signal 4 (SIGILL), code 1, fault addr 0x997d2f98 in tid 32162 (V8Engine)

11-10 12:08:25.670 271 271 W debuggerd: handling request: pid=32122 uid=10116 gid=10116 tid=32162

11-10 12:08:25.704 32212 32212 DEBUG F *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

All access to the Isolate in all parts of the app is protected by Locker instances, so I'm not sure where this comes from.

Any help would be appreciated.

Thanks and best,

Kevin

Jochen Eisinger

unread,

Nov 10, 2016, 8:46:37 AM11/10/16

to v8-users

can you file a bug at crbug.com/v8/new please? It would be great if you could provide a complete repro case!

thanks

-jochen

--
--
v8-users mailing list
v8-u...@googlegroups.com
http://groups.google.com/group/v8-users
---
You received this message because you are subscribed to the Google Groups "v8-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+u...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Kevin Read

unread,

Nov 16, 2016, 10:13:58 AM11/16/16

to v8-users

Hi Jochen,

I've filed a bug (https://bugs.chromium.org/p/v8/issues/detail?id=5645). Since our SDK is open source I added pointers to code that will reproduce the issue.