[Valgrind-users] Invalid reads and calls to free()/delete after dlopen

[Miguel G. <mig...@gm...>]

Hello List,

I'm seeing lots of reports similar to the ones attached below when I run 
valgrind on my project.  The code seems to be sound because when I don't 
dlopen a shared library, no reports are output.  Also, I'm unsure if it 
is relevant but my project uses boost.

What, in your opinion, is causing valgrind to report the (non-)issues 
below?  And, if it is indeed valgrind at fault here, are there any 
special measures I can take so as to ensure valgrind runs correctly?


=================

==20245== Invalid read of size 4
==20245==    at 0x58E064D: ??? (in /usr/lib/x86_64-linux-gnu/libstdc+
+.so.6.0.18)
==20245==    by 0x593F05E: std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::~basic_string() (in /usr/
lib/x86_64-linux-gnu/libstdc++.so.6.0.18)
==20245==    by 0x5DDB070: __run_exit_handlers (exit.c:77)
==20245==    by 0x5DDB0F4: exit (exit.c:99)
==20245==    by 0x5DC0DEB: (below main) (libc-start.c:294)
==20245==  Address 0x6688980 is 16 bytes inside a block of size 39 free'd
==20245==    at 0x4C2BADC: operator delete(void*) (in /usr/lib/valgrind/
vgpreload_memcheck-amd64-linux.so)
==20245==    by 0x593F05E: std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::~basic_string() (in /usr/
lib/x86_64-linux-gnu/libstdc++.so.6.0.18)
==20245==    by 0x5DDB479: __cxa_finalize (cxa_finalize.c:55)
==20245==    by 0x7467BF2: ???
==20245==    by 0x4014BCE: _dl_close_worker (dl-close.c:266)
==20245==    by 0x401569D: _dl_close (dl-close.c:776)
==20245==    by 0x400F6E5: _dl_catch_error (dl-error.c:177)
==20245==    by 0x568263B: _dlerror_run (dlerror.c:163)
==20245==    by 0x568210E: dlclose (dlclose.c:47)
==20245==    by 0x50A22E: omnis::transform::Collection::~Collection() 
(transform_collection.cxx:47)
==20245==    by 0x4EDAE8: OmnisApp::run(int, char**) (omnis_app.cxx:107)
==20245==    by 0x4EE25D: main (main.cxx:16)
==20245== 
==20245== Invalid free() / delete / delete[] / realloc()
==20245==    at 0x4C2BADC: operator delete(void*) (in /usr/lib/valgrind/
vgpreload_memcheck-amd64-linux.so)
==20245==    by 0x593F05E: std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::~basic_string() (in /usr/
lib/x86_64-linux-gnu/libstdc++.so.6.0.18)
==20245==    by 0x5DDB070: __run_exit_handlers (exit.c:77)
==20245==    by 0x5DDB0F4: exit (exit.c:99)
==20245==    by 0x5DC0DEB: (below main) (libc-start.c:294)
==20245==  Address 0x6688970 is 0 bytes inside a block of size 39 free'd
==20245==    at 0x4C2BADC: operator delete(void*) (in /usr/lib/valgrind/
vgpreload_memcheck-amd64-linux.so)
==20245==    by 0x593F05E: std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::~basic_string() (in /usr/
lib/x86_64-linux-gnu/libstdc++.so.6.0.18)
==20245==    by 0x5DDB479: __cxa_finalize (cxa_finalize.c:55)
==20245==    by 0x7467BF2: ???
==20245==    by 0x4014BCE: _dl_close_worker (dl-close.c:266)
==20245==    by 0x401569D: _dl_close (dl-close.c:776)
==20245==    by 0x400F6E5: _dl_catch_error (dl-error.c:177)
==20245==    by 0x568263B: _dlerror_run (dlerror.c:163)
==20245==    by 0x568210E: dlclose (dlclose.c:47)
==20245==    by 0x50A22E: omnis::transform::Collection::~Collection() 
(transform_collection.cxx:47)
==20245==    by 0x4EDAE8: OmnisApp::run(int, char**) (omnis_app.cxx:107)
==20245==    by 0x4EE25D: main (main.cxx:16)