Re: A number of testsuite problems

[Phil Edwards <phil at jaj dot com>]

On Fri, Jun 27, 2003 at 04:31:02PM -0400, Phil Edwards wrote:
> On Fri, Jun 27, 2003 at 11:51:01AM -0500, B. Kosnik wrote:
> 
> > >2)  The trunk testsuite is being linked against the installed system
> > >libstdc++.so, not the freshly built one.
> > 
> > Cannot reproduce. I do have LD_LIBRARY_PATH set to the build dir though.
> 
> The dg harness should be doing this.  I can't reproduce it by hand.  Grr.

The dejangu harness /thinks/ it's doing this.  There's a bit in
libstdc++-v3-init which sets up those variables, and adding a print
statement shows that it's calculating the right paths.  Also, I noticed
that we're not setting LD_RUN_PATH.

I added some code in testsuite_hooks.h which will check where the .so is
coming from.  We'll see what happens.


> > >3)  27_io/basic_filebuf/close/char/4879.cc has two problems:
> > >
> > >  a)  it hangs opening tmp_fifo1, and
> > >  b)  dejagnu isn't killing it after the timeout, and in fact it's recorded
> > >      as a PASS.

(b) might be due to the fact that this test fork()s.  I don't know how
dejagnu deals with forks, but I bet that it doesn't pay attention to
children.

This is interesting.  The test's pseudocode is

    name = "tmp_fifo1";
    mkfifo (name);
    fork();

    if (this is now the child process)
    {
        std::ifstream ifs(name);
        sleep(1);
        ifs.close();
        exit(0);
    }

    std::ofstream ofs(name);
    sleep(2);
    ofs.put('t');
    ofs.close();

    if (ofs' state is /not/ failbit)
    {
        fail the test;
    }
    pass the test;

And the dejagnu log records that the test passes after 3 seconds, which
I bet is the parent.  Because the process which gets hung for hours is
blocking on "open(name, O_RDONLY)", which to me says "std::ifstream".

My head is swimming with theories, but I haven't yet thought of a way to
test them.


Phil

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