C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  unexplainable segfaults          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Marc R. Guest Posted: Mon May 21, 2007 8:53 am    Post subject: unexplainable segfaults Hi there, consider the following code: #include "stdafx.h" int main(int argc, char* argv[]) { const int Xres = 600; const int Yres = 600; std::pair<float,float> dispFNabla[Yres][Xres]; std::pair<float,float> dispFNabla2[Yres][Xres]; std::pair<float,float> dispFNabla3[Yres][Xres]; std::pair<float,float> dispFNabla4[Yres][Xres]; std::pair<float,float> dispFNabla5[Yres][Xres]; std::pair<float,float> dispFNabla6[Yres][Xres]; std::pair<float,float> dispFNabla7[Yres][Xres]; std::pair<float,float> depthFNablaZ[Yres][Xres]; float depthHessZ[Yres][Xres][4]; return 0; } Why in the world could it generate a segmentation fault? : (gdb) run Starting program: /local/home/neo/BT/P/MicroDepth Failed to read a valid object file image from memory. Program received signal SIGSEGV, Segmentation fault. 0x08048e0c in main () at src/MicroDepth.cxx:6 6 std::pair<float,float> dispFNabla[Yres][Xres]; (gdb) print dispFNabla $1 = {{{first = 0, second = 0} <repeats 600 times>} <repeats 599 times>, {{ first = 0, second = 0} <repeats 277 times>, {first = -2.67723372e-05, second = -1.70868349}, {first = -2.89307955e-05, second = -2.45322353e-05}, {first = -2.6772359e-05, <snip> second = 1.40129846e-45}...}} (gdb) print dispFNabla2 $2 = {{{first = 0, second = 0} <repeats 600 times>} <repeats 600 times>} (gdb) print dispFNabla3 Cannot access memory at address 0xbf66030c (gdb) print dispFNabla4 Cannot access memory at address 0xbf3a110c Regards, Marc -- DO NOT REPLY TO THIS EMAIL ADDRESS, IT WILL NOT WORK ACTUALLY YOU WILL AUTOMATICALLY BE BLACKLISTED Back to top Ian Collins Guest Posted: Mon May 21, 2007 8:59 am    Post subject: Re: unexplainable segfaults Marc R. wrote: Quote: Hi there, consider the following code: #include "stdafx.h" What's this? Quote: int main(int argc, char* argv[]) { const int Xres = 600; const int Yres = 600; std::pair<float,float> dispFNabla[Yres][Xres]; std::pair<float,float> dispFNabla2[Yres][Xres]; std::pair<float,float> dispFNabla3[Yres][Xres]; std::pair<float,float> dispFNabla4[Yres][Xres]; std::pair<float,float> dispFNabla5[Yres][Xres]; std::pair<float,float> dispFNabla6[Yres][Xres]; std::pair<float,float> dispFNabla7[Yres][Xres]; std::pair<float,float> depthFNablaZ[Yres][Xres]; float depthHessZ[Yres][Xres][4]; return 0; } Why in the world could it generate a segmentation fault? : Overflowed your stack? -- Ian Collins. Back to top Default User Guest Posted: Mon May 21, 2007 9:11 am    Post subject: Re: unexplainable segfaults Marc R. wrote: Quote: Hi there, consider the following code: float depthHessZ[Yres][Xres][4]; Cannot access memory at address 0xbf3a110c Almost 1.5 meg of automatic data? I'm not surprised. Use a vector or dynamic array. Brian Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.