Hi, i guess you spotted a bug in flext. in C++ it's valid (although not common practice) to delete a NULL ptr and flext doesn't handle that correctly. As a quick fix, you can search flsupport.cpp for the following function and insert one line of code as shown below.

void flext_root::operator delete(void *blk) { if(!blk) return; // INSERT THIS LINE

Then recompile and reinstall flext. Please let me know if it helps.

I'd appreciate flext-related stuff to be sent to the flext mailing list.

thanks, gr~~~

Am 12.06.2008 um 20:23 schrieb Pablo Vanwoerkom:

Hello,

This is my first post on the list, so I hope it makes sense. Any help is appreciated!

I've been having trouble running the DEBUG-SINGLE binary of an external that uses flext. I launch pd and the patch that calls the external. When I attach the process id in gdb, gdb seems to recognize the symbols from the external. Then when I do anything useful back in puredata, puredata crashes, at the bottom is the message I get.

I did not make the external. However, the RELASE-SINGLE binary that flext produces works for the most part when using it from pd. I am guessing I am not compiling the external correctly or perhaps(though doubt it) I did not compile and install flext correctly. My version of puredata is 0.41-0.

Just in case, this is the part of the external compilation process dealing with the debug binaries. I don't really know either what the different debug versions are (shared, multi, single)...

Thank you, -Pablo V.

g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/CircularMatrix.cpp -o pd-linux/debug-single/CircularMatrix.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundFile.cpp -o pd-linux/debug-single/SoundFile.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/DriverFlext.cpp -o pd-linux/debug-single/DriverFlext.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/MatchedFilter.cpp -o pd-linux/debug-single/MatchedFilter.opp soundspotter3/MatchedFilter.cpp: In constructor ‘MatchedFilter::MatchedFilter(SoundSpotter*)’: soundspotter3/MatchedFilter.cpp:22: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:26: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:32: warning: deprecated conversion from string constant to ‘char*’ g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/Matcher.cpp -o pd-linux/debug-single/Matcher.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundSpotter.cpp -o pd-linux/debug-single/SoundSpotter.opp g++ -pthread -shared -Wl,-x -g -L/usr/local/src/pd/bin -L/usr/local/ lib -o pd-linux/debug-single/soundspotter~.pd_linux pd-linux/debug-single/CircularMatrix.opp pd-linux/debug-single/SoundFile.opp pd-linux/debug-single/DriverFlext.opp pd-linux/debug-single/MatchedFilter.opp pd-linux/debug-single/Matcher.opp pd-linux/debug-single/ SoundSpotter.opp -lsndfile -lfftw3 -lflext-pd_sd chmod 755 pd-linux/debug-single/soundspotter~.pd_linux make[1]: Leaving directory `/media/docs/capstone/pureData/ soundspotter3' make -f ../flext/buildsys/gnumake-sub.mak PLATFORM=lnx RTSYS=pd COMPILER=gcc BUILDPATH=../flext/buildsys/ PKGINFO=package.txt BUILDCLASS=ext USRCONFIG=config.txt USRMAKE=build/gnumake-lnx-gcc.inc TARGETMODE=debug TARGETTYPE=multi THREADED=1 DEBUG=1 _build_ make[1]: Entering directory `/media/docs/capstone/pureData/ soundspotter3' mkdir -p pd-linux/debug-multi g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/CircularMatrix.cpp -o pd-linux/debug-multi/CircularMatrix.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundFile.cpp -o pd-linux/debug-multi/SoundFile.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/DriverFlext.cpp -o pd-linux/debug-multi/DriverFlext.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/MatchedFilter.cpp -o pd-linux/debug-multi/MatchedFilter.opp soundspotter3/MatchedFilter.cpp: In constructor ‘MatchedFilter::MatchedFilter(SoundSpotter*)’: soundspotter3/MatchedFilter.cpp:22: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:26: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:32: warning: deprecated conversion from string constant to ‘char*’ g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/Matcher.cpp -o pd-linux/debug-multi/Matcher.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_THREADS -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundSpotter.cpp -o pd-linux/debug-multi/SoundSpotter.opp g++ -pthread -shared -Wl,-x -g -L/usr/local/src/pd/bin -L/usr/local/ lib -o pd-linux/debug-multi/soundspotter~.pd_linux pd-linux/debug-multi/CircularMatrix.opp pd-linux/debug-multi/SoundFile.opp pd-linux/debug-multi/ DriverFlext.opp pd-linux/debug-multi/MatchedFilter.opp pd-linux/debug-multi/ Matcher.opp pd-linux/debug-multi/SoundSpotter.opp -lsndfile -lfftw3 -lflext-pd_td chmod 755 pd-linux/debug-multi/soundspotter~.pd_linux make[1]: Leaving directory `/media/docs/capstone/pureData/ soundspotter3' make -f ../flext/buildsys/gnumake-sub.mak PLATFORM=lnx RTSYS=pd COMPILER=gcc BUILDPATH=../flext/buildsys/ PKGINFO=package.txt BUILDCLASS=ext USRCONFIG=config.txt USRMAKE=build/gnumake-lnx-gcc.inc TARGETMODE=debug TARGETTYPE=shared SHARED=1 DEBUG=1 _build_ make[1]: Entering directory `/media/docs/capstone/pureData/ soundspotter3' mkdir -p pd-linux/debug-shared g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/CircularMatrix.cpp -o pd-linux/debug-shared/CircularMatrix.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundFile.cpp -o pd-linux/debug-shared/SoundFile.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/DriverFlext.cpp -o pd-linux/debug-shared/DriverFlext.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/MatchedFilter.cpp -o pd-linux/debug-shared/MatchedFilter.opp soundspotter3/MatchedFilter.cpp: In constructor ‘MatchedFilter::MatchedFilter(SoundSpotter*)’: soundspotter3/MatchedFilter.cpp:22: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:26: warning: deprecated conversion from string constant to ‘char*’ soundspotter3/MatchedFilter.cpp:32: warning: deprecated conversion from string constant to ‘char*’ g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/Matcher.cpp -o pd-linux/debug-shared/Matcher.opp g++ -c -O3 -msse -mfpmath=sse -ffast-math -D_DEBUG -pthread -fPIC -g -DFLEXT_USE_SIMD -DFLEXT_SHARED -DFLEXT_SYS=2 -I/usr/local/src/pd/src -I/usr/local/include/flext soundspotter3/SoundSpotter.cpp -o pd-linux/debug-shared/SoundSpotter.opp g++ -pthread -shared -Wl,-x -g -L/usr/local/src/pd/bin -L/usr/local/ lib -o pd-linux/debug-shared/soundspotter~.pd_linux pd-linux/debug-shared/CircularMatrix.opp pd-linux/debug-shared/SoundFile.opp pd-linux/debug-shared/DriverFlext.opp pd-linux/debug-shared/MatchedFilter.opp pd-linux/debug-shared/Matcher.opp pd-linux/debug-shared/ SoundSpotter.opp -lsndfile -lfftw3 -lflext-pd_d chmod 755 pd-linux/debug-shared/soundspotter~.pd_linux make[1]: Leaving directory `/media/docs/capstone/pureData/ soundspotter3'

======================================== *Below is the error I am getting when I try to load a soundfile in the puredata patch that uses the soundspotter external:* ===================================================== Program received signal SIGSEGV, Segmentation fault. 0x9d879480 in flext_root_single::operator delete (blk=0x0) at source/flsupport.cpp:173 173 size_t bytes = *(size_t *)ori; Current language: auto; currently c++ ====================================================

*And the backtrace is:*

#0 0x9d879480 in flext_root_single::operator delete (blk=0x0) at source/flsupport.cpp:173 #1 0x9d8723f9 in operator delete (blk=0x0) at source/flsupport.h:103 #2 0x9d86b1c2 in SoundFile::loadSound (this=0x82597f4) at soundspotter3/SoundFile.cpp:31 #3 0x9d86b2d1 in SoundFile::sfOpen (this=0x82597f4, inFileName=0x82597b8 "/media/docs/capstone/audioclips/HummedScale_Don.wav") at soundspotter3/SoundFile.cpp:21 #4 0x9d86ca16 in soundspotter::m_milt (this=0x823a154, argc=1, argv=0xbfc0958c) at soundspotter3/DriverFlext.cpp:103 #5 0x9d86cfeb in soundspotter::flext_c_m_milt (c=0x823a154, argc=1, argv=0xbfc0958c) at soundspotter3/DriverFlext.h:55 #6 0x9d87e08a in flext_base_single::TryMethTag (this=0x823a154, lst=0x823a4ac, tag=0x823f578, argc=1, argv=0xbfc0958c) at source/flmsg.cpp:37 #7 0x9d87e4ba in flext_base_single::FindMeth (this=0x823a154, inlet=0, s=0x823f578, argc=1, argv=0xbfc0958c) at source/flmsg.cpp:146 #8 0x9d87e67d in flext_base_single::CbMethodHandler (this=0x823a154, inlet=0, s=0x823f578, argc=1, argv=0xbfc0958c) at source/flmsg.cpp:184 #9 0x9d87ec84 in flext_base_single::cb_px_anything (c=0x8239d98, s=0x823f578, argc=1, argv=0xbfc0958c) at source/flproxy.cpp:32 #10 0x080aa5d6 in pd_typedmess () #11 0x082432c8 in ?? () #12 0xbfc09336 in ?? () #13 0xbfc09792 in ?? () #14 0x00000010 in ?? () #15 0x00000004 in ?? ()

#16 0x00000000 in ?? ()

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