[Bug mi/17108] New: Some records are not output after rapidly attaching to inferiors

["dryden2 at illinois dot edu" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17108

            Bug ID: 17108
           Summary: Some records are not output after rapidly attaching to
                    inferiors
           Product: gdb
           Version: 7.7
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mi
          Assignee: unassigned at sourceware dot org
          Reporter: dryden2 at illinois dot edu

Created attachment 7676
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7676&action=edit
GDB input/output

OS: Linux 2.6.32-431.17.1.el6.x86_64 on a 12-core Intel machine.

GDB version: 7.7.1

Rapidly attaching to multiple inferiors while using the machine interface, such
as with a program loop or by copy-pasting the commands all at once, results in
the *stopped and =library-loaded records for some inferiors to not be output.
Adding a pause of about 0.1 s after the first attach seems to avoid the
problem.

Reproducing:
I use
#include <stdio.h>
#include <unistd.h>

int main(int argc, char** argv) {
  int i = 0;
  while (i != 1) {
    sleep(1);
  }
}

as my test program. Start twelve instances: for i in `seq 1 12`; do ( ./test &
); done

Then I start GDB: gdb --quiet --nx --nw --interpreter=mi2

And paste the following all at once (with the appropriate PIDs) to GDB:
00000000-enable-pretty-printing  
00000001-gdb-set target-async on
00000002-gdb-set pagination off
00000003-gdb-set non-stop on
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000004-add-inferior
00000005-target-attach --thread-group i1 PID
00000006-target-attach --thread-group i2 PID
00000007-target-attach --thread-group i3 PID
00000008-target-attach --thread-group i4 PID
00000009-target-attach --thread-group i5 PID
00000010-target-attach --thread-group i6 PID
00000011-target-attach --thread-group i7 PID
00000012-target-attach --thread-group i8 PID
00000013-target-attach --thread-group i9 PID
00000014-target-attach --thread-group i10 PID
00000015-target-attach --thread-group i11 PID
00000016-target-attach --thread-group i12 PID

Actual results: See the attachment for GDB's output. The *stopped and
=library-loaded records are not output for inferior i1, but are for the other
inferiors.

Expected results: GDB should output the records for every inferior.

It seems that pausing after the first attach results in everything working as
expected.

-- 
You are receiving this mail because:
You are on the CC list for the bug.