[Bug nptl/5171] New: Memory leak in nptl pthread_create() call

["apconole at yahoo dot com" <sourceware-bugzilla@sourceware.org>]

While testing out a heap management system, I noticed that there consistently
appears to be 100 bytes or so leaked during the call to pthread_create. This
memory is not reclaimed, even with explicit usage of pthread_exit.

The PC of the leak, under gdb, yeilds the following:
0x4000dcc4 <allocate_dtv+52>: call 0x4000076c <completed.4497+939223960>
0x4000dcc9 <allocate_dtv+57>: test %eax,%eax

The backtrace of this call:
#0 0x4000dc9b in allocate_dtv () from /lib/ld-linux.so.2
#1 0x4000df3c in _dl_allocate_tls () from /lib/ld-linux.so.2
#2 0x441a78e5 in pthread_create@@GLIBC_2.1 () from /lib/tls/libpthread.so.0
#3 0x0804885a in main () at test.c:59

The reporting from valgrind confirms this:

272 bytes in 2 blocks are possibly lost in loss record 5 of 7
at 0x40046FF: calloc (vg_replace_malloc.c:279)
by 0x446479E9: _dl_allocate_tls (in /lib/ld-2.5.so)
by 0x447C79D6: pthread_create@@GLIBC_2.1 (in /lib/libpthread-2.5.so)
by 0x80488BD: main (test.c:59)

I can also dump the contents of these bytes, if needed.

-- 
           Summary: Memory leak in nptl pthread_create() call
           Product: glibc
           Version: 2.3.5
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nptl
        AssignedTo: drepper at redhat dot com
        ReportedBy: apconole at yahoo dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=5171

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