I am writing a text-to-speech loadable module for the open source telephony server Freeswitch, using the new AWS Polly text-to-speech service. The AWS C++ SDK is C++11, templatized, etc., and I am wrapping it in C with calls to factory methods returning opaque pointers to objects. I am not actually executing any AWS functions at the moment, just the static allocation of these two variables that set up the SDK and the client.
static Aws::SDKOptions options; static Aws::Client::ClientConfiguration config; The rest of my Freeswitch module code is stubbed out, and makes no AWS calls. When I start and stop Freeswitch, the stub Polly module loads and unloads. At server exit, I get a free() error. After recompiling everything with -O0, I get this single invalid output from valgrind: ==5892== Invalid free() / delete / delete[] / realloc() ==5892== at 0x4C29E90: free (vg_replace_malloc.c:473) ==5892== by 0xF467A9D: Aws::Allocator<char>::deallocate(char*, unsigned long) (AWSAllocator.h:74) ==5892== by 0xF467778: std::basic_string<char, std::char_traits<char>, Aws::Allocator<char> >::_Rep::_M_destroy(Aws::Allocator<char> const&) (basic_string.tcc:449) ==5892== by 0xF4674F3: std::basic_string<char, std::char_traits<char>, Aws::Allocator<char> >::_Rep::_M_dispose(Aws::Allocator<char> const&) (basic_string.h:249) ==5892== by 0xF467386: std::basic_string<char, std::char_traits<char>, Aws::Allocator<char> >::~basic_string() (basic_string.h:547) ==5892== by 0xF46706F: Aws::Client::ClientConfiguration::~ClientConfiguration() (ClientConfiguration.h:48) ==5892== by 0x68B9B28: __run_exit_handlers (exit.c:82) ==5892== by 0x68B9B74: exit (exit.c:104) ==5892== by 0x68A3B4B: (below main) (libc-start.c:321) ==5892== Address 0xf95f6a0 is in the BSS segment of /usr/local/lib/libaws-cpp-sdk-core.so ==5892== ==5892== I got the glibc source for my Linux and the last line of libc-start.c is line 321, the return statement from main(). There are a bunch of small allocation errors in the rest of Freeswitch, but no more "Invalid free/delete/delete[]/realloc()" errors. I also wrote a minimal dlopen/dlsym/dlclose main program to exercise the loadable module, and got no free() errors from the static destructor, though the build systems are somewhat different from my toy main and the entire Freeswitch server. The AWS C++ SDK has a flexible memory allocation system, but I am not using any of that and thus it defaults to the system built in malloc/free/new/delete. I don't understand the last line: Address 0xf95f6a0 is in the BSS segment of /usr/local/lib/libaws-cpp-\ sdk-core.so Is there anything unusual in the trace? How do I use this to figure out where/why the free() error is happening? Thanks! ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! The API offers world-renowned dictionary content that is easy and intuitive to access. Sign up for an account today to start using our lexical data to power your apps and projects. Get started today and enter our developer competition. http://sdm.link/oxford _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
