Hi Friends,
I have one confusion regarding a mex code. The code is giving me a segmentation fault.
#include<math.h>#include<stdio.h>#include<mex.h> #include <complex.h>void mexFunction(int nlhs,mxArray *outputs[],int nrhs,const mxArray *prhs[]){ const mxArray *R_locpr,*Nbpscpr,*mlpr,*Sym_x3_searchpr,*kmodpr,*fxpr,*fp_rsym_fmt_prodpr; int R_loc_rowLen,R_loc_colLen,Sym_x3_search_rowLen,Sym_x3_search_colLen,i,j; double *R_locr,*R_loci,*dmp_fmt_values,resolution,R_23_loc_in_cncr,R_23_loc_in_cnci,R_13_loc_in_cncr,R_13_loc_in_cnci,R_12_loc_in_cncr,R_12_loc_in_cnci; double *Nbpsc,*kmod,*fxp,*fp_rsym_fmt_prod,*Sym_x3_searchr,*Sym_x3_searchi,*dummyr,*dummyi,*SYM_locr,*SYM_loci; double complex *SYM_loc,*Sym_x3_search,*R_loc,R_23_loc_in_cnc,R_13_loc_in_cnc,R_12_loc_in_cnc,c; mxArray *dmp_fmt,*rsym_prod,*xData[2],*array_ptr ; int *ml; R_locpr=prhs[5]; R_locr=mxGetPr(R_locpr); R_loci=mxGetPi(R_locpr); R_loc_rowLen=mxGetN(R_locpr); R_loc_colLen=mxGetM(R_locpr); for(i=0;i<R_loc_colLen;i++) { for(j=0;j<R_loc_rowLen;j++) { R_loc[i*R_loc_rowLen+j]=R_locr[i*R_loc_rowLen+j]+R_loc[i*R_loc_rowLen+j]* _Complex_I; } } dmp_fmt = mexGetVariable( "caller","fp_x_dmp_fmt"); if(dmp_fmt==NULL) { mexErrMsgTxt("Could not get fp_x_dmp_fmt from MATLAB workspace."); } else { dmp_fmt_values=mxGetPr(dmp_fmt); resolution = pow(0.5,dmp_fmt_values[1]); } if(R_loc_colLen == 3) { R_23_loc_in_cnc=R_loc[7]; R_13_loc_in_cnc=R_loc[6]; } R_12_loc_in_cnc=R_loc[3]; mlpr=prhs[14]; Nbpscpr=prhs[3]; ml=mxGetPr(mlpr); Nbpsc=mxGetPr(Nbpscpr); Sym_x3_searchpr=prhs[1]; Sym_x3_searchr=mxGetPr(Sym_x3_searchpr); Sym_x3_searchi=mxGetPi(Sym_x3_searchpr); Sym_x3_search_rowLen=mxGetN(Sym_x3_searchpr); Sym_x3_search_colLen=mxGetM(Sym_x3_searchpr); for(i=0;i<Sym_x3_search_colLen;i++) { for(j=0;j<Sym_x3_search_rowLen;j++) { Sym_x3_search[i*Sym_x3_search_rowLen+j]=Sym_x3_searchr[i*Sym_x3_search_rowLen+j]+Sym_x3_searchi[i*Sym_x3_search_rowLen+j]* _Complex_I; } } kmodpr=prhs[4]; printf("%d\n",mxGetN(kmodpr)); printf("%d",mxGetM(kmodpr)); kmod=mxGetPr(kmodpr); if(kmodpr==NULL) { mexErrMsgTxt("Could not get kmod from MATLAB workspace."); } fxpr=prhs[13]; fxp=mxGetPr(fxpr); fp_rsym_fmt_prodpr= mexGetVariable( "caller","fp_rsym_prod_fmt"); if(fp_rsym_fmt_prodpr==NULL) { mexErrMsgTxt("Could not get fp_rsym_prod_fmt from MATLAB workspace."); } else { fp_rsym_fmt_prod=mxGetPr(fp_rsym_fmt_prodpr); } if(R_loc_colLen == 3) { for (i=0;i<Sym_x3_search_colLen;i++) { for(j=0;j<Sym_x3_search_rowLen;j++) { SYM_loc[i*Sym_x3_search_rowLen+j]=0; } } } }Here is the log file:----------------------------------------------------------------------- Segmentation violation detected at Fri Sep 28 17:51:08 2012------------------------------------------------------------------------Configuration: MATLAB Version: 7.5.0.338 (R2007b) MATLAB License: XXXXXX Operating System: Linux 2.6.20-1.2962.fc6 #1 SMP Tue Jun 19 19:27:14 EDT 2007 i686 GNU C Library: 2.5 stable Window System: The X.Org Foundation (70101000), display :0.0 Current Visual: 0x23 (class 4, depth 24) Processor ID: x86 Family 15 Model 4 Stepping 7, GenuineIntel Virtual Machine: Java 1.6.0 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode, sharing Default Charset: UTF-8Register State: eax = 00000400 ebx = 00afdbd0 ecx = 08b5a5f0 edx = 00000000 esi = 08b5a3f0 edi = 00000040 ebp = 054ca198 esp = 054ca120 eip = 00afc80e flg = 00010206Stack Trace: [0] list_decode.mexglx:mexFunction~(0, 0x054caa44, 15, 0x054caaa4) + 370 bytes [1] libmex.so:mexRunMexFile(0, 0x054caa44, 15, 0x054caaa4) + 111 bytes [2] libmex.so:Mfh_mex::runMexFileWithSignalProtection(int, mxArray_tag**, int, mxArray_tag**)(0x08e887e0, 0, 0x054caa44, 15) + 120 bytes [3] libmex.so:Mfh_mex::dispatch_file(int, mxArray_tag**, int, mxArray_tag**)(0x08e887e0, 0, 0x054caa44, 15) + 254 bytes [4] libmwm_dispatcher.so:Mfh_file::dispatch_fh(int, mxArray_tag**, int, mxArray_tag**)(0x08e887e0, 0, 0x054caa44, 15) + 217 bytes [5] libmwm_interpreter.so:ResolverFunctionDesc::CallFunction(int, mxArray_tag**, int, mxArray_tag**)(0x054cb024, 0, 0x054caa44, 15) + 808 bytes [6] libmwm_interpreter.so:Resolver::CallMFunction(int, int, _m_operand*, m_operand_storage*, int, _m_operand*, m_operand_storage*, int*)(0x054cac00, 0, 1, 0xb27ed090) + 1530 bytes [7] libmwm_interpreter.so:inResolveMFunctionCall(_m_function_desc*, int, int, _m_operand*, m_operand_storage*, int, _m_operand*, m_operand_storage*, int*, inMarshalType*, int, mpsTypeSequenceNlhs const*, mxArray_tag* (*)(int))(0xb26e50b0, 0, 1, 0xb27ed090) + 461 bytes [8] libmwm_interpreter.so:accelImpl::MFunctionCall(_accelOp**)(0x054cb148, 0x054cb160, 0, 0x08d3cb68) + 216 bytes [9] libmwm_interpreter.so:accelImpl::Exec()(0x054cb148, 0xb26d9a88, 0x054cb158, 0xb2600000) + 215 bytes [10] libmwm_interpreter.so:accelCode::Call(inMarshalType*, int*) const(0xb2a36f80, 0x054cb320, 0x054cb31c, 0x015149a0) + 105 bytes [11] libmwm_interpreter.so:inJit::ExecuteHotSegment(_inJitAccelInfo*, opcodes*, int*, int*)(0x054cb4a4, 0x054cb4ec, 0x054cb4bc, 0x054cb94c) + 1393 bytes [12] libmwm_interpreter.so:.L752(1, 0, 6, 0) + 158 bytes [13] libmwm_interpreter.so:protected_inInterp(inDebugCheck, int, int, opcodes, inPcodeNest_tag*, int*)(1, 0, 1, 0) + 121 bytes [14] libmwm_interpreter.so:inInterPcodeSJ(inDebugCheck, int, int, opcodes, inPcodeNest_tag*, int*)(0, 0xb2bc6690, 0x054cb94c, 0x054cb94c) + 297 bytes [15] libmwm_interpreter.so:inExecuteMFunctionOrScript(Mfh_mp*, bool)(0x08d76a20, 1, 0x054cbc6c, 0) + 625 bytes [16] libmwm_interpreter.so:inRunMfile(int, mxArray_tag**, int, mxArray_tag**, Mfh_mp*, inWorkSpace_tag*)(0, 0x054cbc6c, 0, 0x054cbccc) + 640 bytes [17] libmwm_interpreter.so:Mfh_mp::dispatch_file(_mdUnknown_workspace*, int, mxArray_tag**, int, mxArray_tag**)(0x08d76a20, 0, 0, 0x054cbc6c) + 64 bytes [18] libmwm_interpreter.so:Mfh_mp::dispatch_file(int, mxArray_tag**, int, mxArray_tag**)(0x08d76a20, 0, 0x054cbc6c, 0) + 54 bytes [19] libmwm_dispatcher.so:Mfh_file::dispatch_fh(int, mxArray_tag**, int, mxArray_tag**)(0x08d76a20, 0, 0x054cbc6c, 0) + 217 bytes [20] libmwm_interpreter.so:inDispatchFromStack(int, char const*, int, int)(620, 0x08e91034 "mexcallfunctionmatlab", 0, 0) + 1078 bytes [21] libmwm_interpreter.so:inDispatchCall(char const*, int, int, int, int*, int*)(0, 0x054cbfb8, 0x08e91028, 0x00b270f9) + 160 bytes [22] libmwm_interpreter.so:.L777(2, 0, 0, 0) + 165 bytes [23] libmwm_interpreter.so:protected_inInterp(inDebugCheck, int, int, opcodes, inPcodeNest_tag*, int*)(2, 0, 0, 0) + 121 bytes [24] libmwm_interpreter.so:inInterPcodeSJ(inDebugCheck, int, int, opcodes, inPcodeNest_tag*, int*)(0, 0xb2bc48e0, 0x054cc3e8, 0x00f4ebf0) + 297 bytes [25] libmwm_interpreter.so:inInterPcode(2, 0, 0x01063090, 0x01062310) + 158 bytes [26] libmwm_interpreter.so:inEvalStringWithIsVarFcn(_memory_context*, char const*, EvalType, int, mxArray_tag**, inDebugCheck, _pcodeheader*, int*, bool (*)(void*, char const*), void*, bool)(0x00fc4648 ", 0x08e145a0 "mexcallfunctionmatlab\n", 0, 0) + 2892 bytes [27] libmwm_interpreter.so:inEvalCmdWithLocalReturnandtype(char const*, int*, inDebugCheck, bool)(0, 0, 0xb3242d80, 0x00d6ba28) + 149 bytes [28] libmwbridge.so:ThrowSignal(char const*)(0x08e145a0 "mexcallfunctionmatlab\n", 2, 0x054cd06c ", 0x008237c4) + 99 bytes [29] libmwbridge.so:mnParser(0x054cd0f0, 0x08a8fc48, 1, 0x00559bc2) + 277 bytes [30] libmwmcr.so:mcrInstance::mnParser()(0x08a8fc48, 0x054cf388, 0x08a8fc38, 0x08a42b90) + 52 bytesThis error was detected while a MEX-file was running. If the MEX-fileis not an official MathWorks function, please examine its source codefor errors. Please consult the External Interfaces Guide for informationon debugging MEX-files.If it is an official MathWorks function, pleasefollow these steps to report this problem to The MathWorks so wehave the best chance of correcting it:The next time MATLAB is launched under typical usage, a dialog box willopen to help you send the error log to The MathWorks. Alternatively, youcan send an e-mail to segv@mathworks.com with the following file attached: matlab_logIf the problem is reproducible, please submit a Service Request via: http://www.mathworks.com/support/contact_us/ts/help_request_1.htmlA technical support engineer might contact you with further information.Thank you for your help. Save your workspace and restart MATLAB.Anyone having idea about the problem or rather how to look stack file.
Thanks.
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