This protects against memory corruptions,
and a cascade of issues, such as the following:

 Attaching to process 56245
 [New LWP 56246]
 [New LWP 56252]
 [New LWP 56253]
 [New LWP 56254]
 [New LWP 56362]
 [New LWP 56364]
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 0x00007fda228f7d2d in __GI___pthread_timedjoin_ex (threadid=140574279595776, thread_return=0x0, abstime=0x0, block=<optimized out>) at pthread_join_common.c:89
 89	pthread_join_common.c: No such file or directory.

 Thread 7 (Thread 0x7fda197fa700 (LWP 56364)):
 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
 #1  0x00007fda228f9023 in __GI___pthread_mutex_lock (mutex=0x55e9937567e0 <SigHandlerTrap>) at ../nptl/pthread_mutex_lock.c:78
 #2  0x000055e9934cd4fe in __gthread_mutex_lock (__mutex=0x55e9937567e0 <SigHandlerTrap>) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:748
 #3  std::mutex::lock (this=0x55e9937567e0 <SigHandlerTrap>) at /usr/include/c++/7/bits/std_mutex.h:103
 #4  std::unique_lock<std::mutex>::lock (this=<synthetic pointer>) at /usr/include/c++/7/bits/std_mutex.h:267
 #5  std::unique_lock<std::mutex>::unique_lock (__m=..., this=<synthetic pointer>) at /usr/include/c++/7/bits/std_mutex.h:197
 #6  SigUtil::handleFatalSignal (signal=11) at common/SigUtil.cpp:214
 #7  <signal handler called>
 #8  std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_capacity (this=<optimized out>, __capacity=0) at /usr/include/c++/7/bits/basic_string.h:200
 #9  std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string (__str=..., this=<optimized out>) at /usr/include/c++/7/bits/basic_string.h:542
 #10 std::_Construct<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (
     __p=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:75
 #11 std::__uninitialized_copy<false>::__uninit_copy<std::move_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*> (__result=0x7fd9f40017b0, __last=..., __first=...) at /usr/include/c++/7/bits/stl_uninitialized.h:83
 #12 std::uninitialized_copy<std::move_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*> (__result=<optimized out>, __last=..., __first=...) at /usr/include/c++/7/bits/stl_uninitialized.h:134
 #13 std::__uninitialized_copy_a<std::move_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (__result=<optimized out>, __last=..., __first=...)
     at /usr/include/c++/7/bits/stl_uninitialized.h:289
 #14 std::__uninitialized_move_if_noexcept_a<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > (__alloc=..., __result=<optimized out>, __last=0x55e995662850,
     __first=<optimized out>) at /usr/include/c++/7/bits/stl_uninitialized.h:312
 #15 std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_realloc_insert<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&> (
     this=this@entry=0x55e9937566f0 <FileUtil::getTempFilePath(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)::fileDeleter>,
     __position=<error: Cannot access memory at address 0x3735003238323a>, __args#0="/tmp/loadTorture_viewcursor.odp_725a6013_viewcursor.odp") at /usr/include/c++/7/bits/vector.tcc:424
 #16 0x000055e9934aa829 in std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::push_back (__x="/tmp/loadTorture_viewcursor.odp_725a6013_viewcursor.odp",
     this=0x55e9937566f0 <FileUtil::getTempFilePath(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)::fileDeleter>) at /usr/include/c++/7/bits/stl_vector.h:948
 #17 (anonymous namespace)::FileDeleter::registerForDeletion (file="/tmp/loadTorture_viewcursor.odp_725a6013_viewcursor.odp",
     this=0x55e9937566f0 <FileUtil::getTempFilePath(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)::fileDeleter>) at common/FileUtil.cpp:69
 #18 FileUtil::getTempFilePath (srcDir=..., srcFilename=..., dstFilenamePrefix=...) at common/FileUtil.cpp:97
 #19 0x00007fda216b51c9 in helpers::getDocumentPathAndURL (docFilename="viewcursor.odp", documentPath="", documentURL="", prefix="loadTorture_viewcursor.odp_") at ./helpers.hpp:151
 #20 0x00007fda216ad007 in UnitLoadTorture::loadTorture (this=<optimized out>, testname="loadTorture_viewcursor.odp ", docName="viewcursor.odp", thread_count=thread_count@entry=3,
     max_jitter_ms=<optimized out>, max_jitter_ms@entry=75) at UnitLoadTorture.cpp:41
 #21 0x00007fda216ad7dd in UnitLoadTorture::<lambda()>::operator() (__closure=0x55e994dbc758) at UnitLoadTorture.cpp:186
 #22 std::__invoke_impl<void, UnitLoadTorture::testLoadTorture()::<lambda()> > (__f=...) at /usr/include/c++/7/bits/invoke.h:60
 #23 std::__invoke<UnitLoadTorture::testLoadTorture()::<lambda()> > (__fn=...) at /usr/include/c++/7/bits/invoke.h:95
 #24 std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > >::_M_invoke<0> (this=0x55e994dbc758) at /usr/include/c++/7/thread:234
 #25 std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > >::operator() (this=0x55e994dbc758) at /usr/include/c++/7/thread:243
 #26 std::thread::_State_impl<std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > > >::_M_run(void) (this=0x55e994dbc750) at /usr/include/c++/7/thread:186
 #27 0x00007fda22de366f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 #28 0x00007fda228f66db in start_thread (arg=0x7fda197fa700) at pthread_create.c:463
 #29 0x00007fda2261f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

 Thread 6 (Thread 0x7fd9fffff700 (LWP 56362)):
  #0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
 #1  0x00007fda225952db in __GI___libc_malloc (bytes=bytes@entry=3635) at malloc.c:3063
 #2  0x00007fda2262f364 in __backtrace_symbols (array=array@entry=0x7fd9ffffc540, size=size@entry=26) at backtracesyms.c:69
 #3  0x000055e9934cc439 in SigUtil::dumpBacktrace () at common/SigUtil.cpp:253
 #4  0x000055e9934cd5ae in SigUtil::handleFatalSignal (signal=6) at common/SigUtil.cpp:236
 #5  <signal handler called>
 #6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
 #7  0x00007fda2253e801 in __GI_abort () at abort.c:79
 #8  0x00007fda22587897 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7fda226b4b9a "%s
") at ../sysdeps/posix/libc_fatal.c:181
 #9  0x00007fda2258e90a in malloc_printerr (str=str@entry=0x7fda226b2e0e "malloc(): memory corruption") at malloc.c:5350
 #10 0x00007fda22592994 in _int_malloc (av=av@entry=0x7fda00000020, bytes=bytes@entry=32) at malloc.c:3738
 #11 0x00007fda225952ed in __GI___libc_malloc (bytes=32) at malloc.c:3065
 #12 0x00007fda22db9258 in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 #13 0x00007fda244adaae in __gnu_cxx::new_allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::allocate (this=0x7fd9ffffe740, __n=1)
     at /usr/include/c++/5/ext/new_allocator.h:104
 #14 0x00007fda244ad300 in __gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::allocate (__a=..., __n=1)
     at /usr/include/c++/5/ext/alloc_traits.h:182
 #15 0x00007fda244ac858 in std::_Vector_base<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_allocate (this=0x7fd9ffffe740, __n=1) at /usr/include/c++/5/bits/stl_vector.h:170
 #16 0x00007fda244ab7c7 in std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_insert_aux (this=0x7fd9ffffe740, __position=non-dereferenceable iterator for std::vector, __x="home") at /usr/include/c++/5/bits/vector.tcc:353
 #17 0x00007fda244aada2 in std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::push_back (this=0x7fd9ffffe740, __x="home") at /usr/include/c++/5/bits/stl_vector.h:925
 #18 0x00007fda2350ddcb in Poco::Path::pushDirectory (this=0x7fd9ffffe6c0, dir="home") at src/Path.cpp:471
 #19 0x00007fda2350ea27 in Poco::Path::parseUnix (this=0x7fd9ffffe6c0, path="/home/ash/prj/lo/online/test/") at src/Path.cpp:671
 #20 0x00007fda2350cd6b in Poco::Path::assign (this=0x7fd9ffffe6c0, path="/home/ash/prj/lo/online/test/") at src/Path.cpp:182
 #21 0x00007fda2350c1be in Poco::Path::Path (this=0x7fd9ffffe6c0, path="/home/ash/prj/lo/online/test/") at src/Path.cpp:54
 #22 0x00007fda2350d33a in Poco::Path::makeAbsolute (this=0x7fd9ffffe8f0) at src/Path.cpp:318
 #23 0x00007fda216b52ca in helpers::getDocumentPathAndURL (docFilename="setclientpart.ods", documentPath="/tmp/loadTorture_setclientpart.ods_ae70d2e_setclientpart.ods", documentURL="",
     prefix="loadTorture_setclientpart.ods_") at ./helpers.hpp:153
 #24 0x00007fda216ad007 in UnitLoadTorture::loadTorture (this=<optimized out>, testname="loadTorture_setclientpart.ods ", docName="setclientpart.ods", thread_count=thread_count@entry=3,
     max_jitter_ms=<optimized out>, max_jitter_ms@entry=75) at UnitLoadTorture.cpp:41
 #25 0x00007fda216ad7dd in UnitLoadTorture::<lambda()>::operator() (__closure=0x55e994cffe18) at UnitLoadTorture.cpp:186
 #26 std::__invoke_impl<void, UnitLoadTorture::testLoadTorture()::<lambda()> > (__f=...) at /usr/include/c++/7/bits/invoke.h:60
 #27 std::__invoke<UnitLoadTorture::testLoadTorture()::<lambda()> > (__fn=...) at /usr/include/c++/7/bits/invoke.h:95
 #28 std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > >::_M_invoke<0> (this=0x55e994cffe18) at /usr/include/c++/7/thread:234
 #29 std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > >::operator() (this=0x55e994cffe18) at /usr/include/c++/7/thread:243
 #30 std::thread::_State_impl<std::thread::_Invoker<std::tuple<UnitLoadTorture::testLoadTorture()::<lambda()> > > >::_M_run(void) (this=0x55e994cffe10) at /usr/include/c++/7/thread:186
 #31 0x00007fda22de366f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 #32 0x00007fda228f66db in start_thread (arg=0x7fd9fffff700) at pthread_create.c:463
 #33 0x00007fda2261f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Change-Id: Ib60954e49e692082e686cb3fdc5fc9d5cfbc83c9
Reviewed-on: https://gerrit.libreoffice.org/83047


Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>