Re: [PATCH 00/34] Windows non-stop mode

[Tom Tromey <tromey@adacore.com>]

Tom> At some point I'll apply the patches and run them through the AdaCore
Tom> test suite.

I did this today and I found a few failures.

Now, one thing to note is that I did this by merging your branch into
the AdaCore branch; and AdaCore carries a few local changes.

In particular AdaCore still has the "random thread switch" change that I
submitted a long time ago -- and one of the problems seems to be related
to that.  Without really debugging I don't know if that's a problem in
the series or with the local changes.

Anyway, there are some other problems as well.  For instance:

    (gdb) start
    Temporary breakpoint 1 at 0x140001aab: file p.adb, line 4.
    Starting program: C:\Users\itmgr\sandbox\x86_64-windows64\gdb_version-head_test\tmp\tes
    t\gdb-TS-f539jxg_\J225-024__attach_detach_task\p.exe

    Thread 1 hit Temporary breakpoint 1, p () at p.adb:4
    4          Barrier : Integer := 0;
    PASSED:J225-024__attach_detach_task:start
    (gdb) detach
    Detaching from program: C:\Users\itmgr\sandbox\x86_64-windows64\gdb_version-head_test\t
    mp\test\gdb-TS-f539jxg_\J225-024__attach_detach_task\p.exe, process 4272
    [Inferior 1 (process 4272) detached]
    PASSED:J225-024__attach_detach_task:detach
    (gdb) attach 4272
    Can't attach to process 4272 (error 87): The parameter is incorrect.

Here the test detaches and then re-attaches -- but attach fails.


Another test runs gdb without a symbol file and then does an attach.
The expected output (happens with gdb head) is:

    (gdb) attach 2328
    Attaching to process 2328
    Reading symbols from C:\Users\itmgr\sandbox\x86_64-windows64\gdb_version-head_test\tmp\
    test\gdb-TS-bgt06sfm\N203-009__attach_no_exe\foo_n203_009.EXE...

However with the branch, gdb doesn't try to read the symbols and instead
mentions some system dll:

    (gdb) attach 1276
    Attaching to process 1276
    0x00007ff8b9b50274 in ntdll!ZwDelayExecution ()
       from C:\Windows\SYSTEM32\ntdll.dll


There was also a timeout when detaching.  The inferior being run is
fairly ordinary -- nothing special, just a spot to set a breakpoint:

    (gdb) tbreak break_me
    Temporary breakpoint 1 at 0x140001ca4: file pck.adb, line 37.
    PASSED:CA30-017__detach:tbreak break_me
    (gdb) run
    Starting program: C:\Users\itmgr\sandbox\x86_64-windows64\gdb_version-head_test\tmp\test\gdb-TS-f539jxg_\CA30-017__detach\foo.exe 

    Thread 1 hit Temporary breakpoint 1, pck.break_me () at pck.adb:37
    37	      null;
    PASSED:CA30-017__detach:runto 'break_me'
    (gdb) detach
    TIMEOUT:CA30-017__detach:detach (timeout)
    [killing GDB (pid = N/A (already dead?))]



FWIW I ran the tests before and after the series, on the same machine,
so there shouldn't be any machine configuration issues or anything like
that.

hope this helps,
Tom