Re: How to create multiple contexts in different threads?

On Tue, Mar 29, 2016 at 4:16 AM, Clément Vuchener <
[email protected]> wrote:

> > OK. Does this happen when you call JS_NewRuntime, or later? Can you get a
> > stack trace?
>
> It happens in JS_NewRuntime. There may actually be different assertion
> depending on some race.
>

This is good information.

I'm at a loss. If I were investigating this locally, I would start by
printing the value of lockOwner and PR_GetCurrentThread() in the relevant
places. The initial goal is to figure out if the bug is in SM or NSPR. (You
can do this with GDB rather than messing with the code and recompiling, but
I guess it's a bit of a pain either way.)

How are you building SpiderMonkey and your app? Can you post the configure
command line? Does configuring with --enable-posix-nspr-emulation make it
go away?

At this point, it could still be just about anything, but wild guesses
include:
- enabling exceptions in the app, and not in SpiderMonkey, might mess up
the ABI somehow;
- there could be some NSPR or SM header-vs-runtime version mismatch;
- maybe DEBUG is #defined when compiling some SM source files but not
others, perhaps due to a build system bug when building with unusual options

-j
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