On Tue, May 26, 2015 at 12:41:19PM -0400, m.roth@5-cent.us wrote:
Fred Smith wrote:
I apologize up front, I'm sure this isn't the right place to ask, but I'm not sure where I should ask, instead. Hoping for some helpful hints in that regard...
I'm using (trying to use...) the -fsanitize=thread feature. Though I'm finding the diagnostics rather cryptic, that isn't my issue here. Suddenly, a few days ago, I started getting this error while running the app i'm testing:
<snip> > [New Thread 0x7fcd2f9ea700 (LWP 8152)] > [New Thread 0x7fcd2f1e9700 (LWP 8153)] > ThreadSanitizer: longjmp() is not supported <snip> > [Thread 0x7fcd47858700 (LWP 8141) exited] > > The message about longjmp() is the issue. This app doesn't use longjmp > or siglongjump or any other of its cousins. It's possible that some > 3rd-party lib (Oracle??) might, but I don't know why it has been working for several > weeks and suddenly starts giving me this error... > > Clues welcome, thanks!
Many years ago, a couple young consultants came to me where we were working (I was the "senior technical resource"), and told me the program kept crashing in a library. We ran it under the debugger, and we saw the library call. We reran it, with me at the keyboard, and I did something they had no idea about: I stepped *into* the call, (the old Sun debugger, stepi, rather than step, or stepn). I continued to step, working my way down, finding the calls it crashed in. Finally, I found the function that was crashing, stepped into it - turned out to be a BEA Tuxedo call - and then I, who had the authority, could call them, and even though it was stripped... I could tell them the function it failed in, and more-or-less what it seemed to be doing. 'Bout a day later, I got a message back from the developers what the issue was.
You might try finding your problem that way; then you might have a clue as to how to resolve it.
Oh, and if it's Oracle, don't forget to set TWO_TASK, I think it was called (haven't used Pro*C more than a dozen years....)
I'm not using Pro*C either. I recall reading about TWO_TASK some years ago but never did figure out how to use it in a non-PRO*C environment, or even if it would be of value. Figured out, with a LOT of pain, how to use OCI to do what I needed.