我正在尝试制作此代码的 mex 文件。 mex 文件已创建，但是当我尝试使用此 mex 文件时，我的 matlab 崩溃了，有人可以找到错误吗？ 我的代码在 C 语言中运行得很好，这意味着问题出在 mex 文件创建中。
#include "mex.h"
void IDWT(double z[2],float X[20][4], double row,double col, double of,double nv,double S, double I[9][8])
{
float *sum2;
float **sum;
float **sum1;
float *v;
float **B;
int *indexes;
double *idxl;
double **idx1;
float *dis;
double N=8;
double M=9;
int i,j,k,l,t,f,g,h;
int r=0;
int temp=0;
int f2=4;
int sum22;
int rmax,rmin,cmax,cmin;
int q=rmax*cmax;
float kTmp;
rmin=((row-S)<1)?1:(row-S);
rmax=(N<(row+S))?N:(row+S);
cmin=((col-S)<1)?1:(col-S);
cmax=(M<(col+S))?M:(col+S);
sum= (float *)mxMalloc(q*f2*sizeof(float));
sum1= (float *)mxMalloc(q*f2*sizeof(float));
sum2= (float *)mxMalloc(q*sizeof(float));
B= (float *)mxMalloc(q*f2*sizeof(float));
v=(float *)mxMalloc(f2*sizeof(float));
idx1= (double *)mxMalloc(rmax*cmax*sizeof(double));
idxl= (double *)mxMalloc(q*sizeof(double));
dis= (float *)mxMalloc(q*sizeof(float));
indexes= (int *)mxMalloc(q*sizeof(int));
for (i = 0; i < rmax; i++){
for( j = 0 ; j <cmax ; j++ ){
idx1[i][j]= I[i][j]; }}
for (i = 0; i < rmax; i++)
{ for (j = 0; j < cmax; j++)
{idxl[i + j*rmax] = idx1[i][j];}}
for(l=0; l<(rmax*cmax); l++)
{r=idxl[l]-1;
for(k=0; k<f2; k++)
{B[l][k]=X[r][k];}}
for (i = 0,j=(of-1); i <f2; i++)
{v[i] = X[j][i]; }
for (i = 0; i<f2 ; i++) {
for (j = 0 ; j < (rmax*cmax); j++) {
sum[j][i] = B[j][i] - v[i];
sum1[j][i]= pow(sum[j][i],2); }}
for (i = 0; i <(rmax*cmax) ; i++) {
sum22=0;
for (j = 0 ; j < f2; j++) {
sum22+=sum1[i][j];}
sum2[i]=sum22;}
for(i = 0; i <(rmax*cmax) ; i++)
{ dis[i]= sum2[i]/f2;}
for( f = 0; f < rmax*cmax; f++)
indexes[f] = f;
for(g = 0; g < rmax*cmax; g++)
{for(h = 0; h < rmax*cmax; h++)
{if(dis[indexes[g]] < dis[indexes[h]])
{kTmp = indexes[g];
indexes[g] = indexes[h];
indexes[h] = kTmp;}}}
for (j = 0; j <2; j++)
{ temp=indexes[j];
z[j]=idxl[temp];}
for (t = 0; t <2; t++)
{ printf("%lf---\n", z[t]);}
mxFree (sum);
mxFree (sum1);
mxFree(sum2);
mxFree(B);
mxFree(v);
mxFree(idx1);
mxFree(idxl);
mxFree(dis);
mxFree(indexes);
}
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
//DECLARING ALL THE ARGUMENTS
float *X; double row; double col; double of; double nv; double S; double *I;
//DOUBLE PRECISION CORRESPONDANCE OF THE OUTPUT
double *Z;
X = mxGetPr(prhs[0]);
row = mxGetScalar(prhs[1]);
col = mxGetScalar(prhs[2]);
of = mxGetScalar(prhs[3]);
nv = mxGetScalar(prhs[4]);
S = mxGetScalar(prhs[5]);
I= mxGetPr(prhs[6]);
plhs[0] = mxCreateDoubleMatrix(2,1,mxREAL);
Z = mxGetPr(plhs[0]);
IDWT(Z,X,row,col, of, nv, S, I);
}
这是堆栈跟踪
MATLAB crash file:C:\Users\ABEERA~1\AppData\Local\Temp\matlab_crash_dump.1808-1:
------------------------------------------------------------------------
Segmentation violation detected at Mon Jun 01 11:47:58 2015
------------------------------------------------------------------------
Configuration:
Crash Decoding : Disabled
Default Encoding : windows-1252
MATLAB Architecture: win64
MATLAB Root : C:\Program Files\MATLAB\R2013a
MATLAB Version : 8.1.0.604 (R2013a)
Operating System : Microsoft Windows 8
Processor ID : x86 Family 6 Model 42 Stepping 7, GenuineIntel
Virtual Machine : Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
Window System : Version 6.2 (Build 9200)
Fault Count: 1
Abnormal termination:
Segmentation violation
Register State (from fault):
RAX = 3ff0000000000000 RBX = 00000000983d2080
RCX = 0000000000000001 RDX = 0000000000000008
RSP = 000000000403a470 RBP = 00000000983823a0
RSI = 0000000000000000 RDI = 0000000000000002
R8 = 00000000983823a0 R9 = 0000000000000002
R10 = 0000000000000000 R11 = 0000000000000000
R12 = 0000000000000002 R13 = 000000007d9fdba0
R14 = 0000000000000004 R15 = 0000000000000000
RIP = 00007fff892111b3 EFL = 00010202
CS = 0033 FS = 0053 GS = 002b
Stack Trace (from fault):
[ 0] 0x00007fff892111b3 C:\Users\abeera tariq\Desktop\data\prp.mexw64+00004531
[ 1] 0x00007fff89211ac2 C:\Users\abeera tariq\Desktop\data\prp.mexw64+00006850 mexFunction+00000210
[ 2] 0x000000000442f731 C:\Program Files\MATLAB\R2013a\bin\win64\libmex.dll+00063281 mexRunMexFile+00000129
[ 3] 0x000000000442e202 C:\Program Files\MATLAB\R2013a\bin\win64\libmex.dll+00057858 inSwapMexfileReader+00000226
[ 4] 0x000000000442f2b4 C:\Program Files\MATLAB\R2013a\bin\win64\libmex.dll+00062132 _constructor_lm_mexmaci64+00001620
[ 5] 0x0000000074e8c64f C:\Program Files\MATLAB\R2013a\bin\win64\m_dispatcher.dll+00050767 Mfh_file::dispatch_fh+00000623
[ 6] 0x0000000074e8ced2 C:\Program Files\MATLAB\R2013a\bin\win64\m_dispatcher.dll+00052946 Mfunction_handle::dispatch+00000802
[ 7] 0x0000000004f5bc7b C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00834683 inDestroyWS+00392123
[ 8] 0x0000000004f4b091 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00766097 inDestroyWS+00323537
[ 9] 0x0000000004f3008f C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00655503 inDestroyWS+00212943
[ 10] 0x0000000004f465a4 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00746916 inDestroyWS+00304356
[ 11] 0x0000000004f3c3b0 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00705456 inDestroyWS+00262896
[ 12] 0x0000000004f2f112 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00651538 inDestroyWS+00208978
[ 13] 0x0000000004f30bd0 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00658384 inDestroyWS+00215824
[ 14] 0x0000000004f1cf79 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00577401 inDestroyWS+00134841
[ 15] 0x0000000074e8c64f C:\Program Files\MATLAB\R2013a\bin\win64\m_dispatcher.dll+00050767 Mfh_file::dispatch_fh+00000623
[ 16] 0x0000000074e8ced2 C:\Program Files\MATLAB\R2013a\bin\win64\m_dispatcher.dll+00052946 Mfunction_handle::dispatch+00000802
[ 17] 0x0000000004e9e70e C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00059150 inValidateLoadedObject+00002350
[ 18] 0x0000000004fa6495 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+01139861 IInterpreter::IInterpreter+00000229
[ 19] 0x0000000004faca45 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+01165893 inRegisterFunctionHandles+00004405
[ 20] 0x0000000004faca12 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+01165842 inRegisterFunctionHandles+00004354
[ 21] 0x0000000004fac9d7 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+01165783 inRegisterFunctionHandles+00004295
[ 22] 0x0000000004f9ba0e C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+01096206 inGetSeqVarPtrsFromCurrentWS+00005742
[ 23] 0x0000000004e9be89 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00048777 inEvalCmdWithLocalReturn+00000329
[ 24] 0x0000000004e9bdcc C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00048588 inEvalCmdWithLocalReturn+00000140
[ 25] 0x0000000004e9bd81 C:\Program Files\MATLAB\R2013a\bin\win64\m_interpreter.dll+00048513 inEvalCmdWithLocalReturn+00000065
[ 26] 0x0000000079fbbecd C:\Program Files\MATLAB\R2013a\bin\win64\libmwbridge.dll+00048845 mnDebugPrompt+00000109
[ 27] 0x0000000079fbd01b C:\Program Files\MATLAB\R2013a\bin\win64\libmwbridge.dll+00053275 mnParser+00000763
[ 28] 0x000000007499daa4 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00187044 mcrInstance::mnParser_on_interpreter_thread+00000036
[ 29] 0x0000000074982220 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00074272 mcr::setInterpreterThreadToCurrent+00031664
[ 30] 0x0000000074982280 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00074368 mcr::setInterpreterThreadToCurrent+00031760
[ 31] 0x00000000057af9d6 C:\Program Files\MATLAB\R2013a\bin\win64\uiw.dll+00391638 UIW_IsUserMessage+00000086
[ 32] 0x00000000057b0095 C:\Program Files\MATLAB\R2013a\bin\win64\uiw.dll+00393365 UIW_SetGLIMUserMsg+00000117
[ 33] 0x00007fff8eeeb6f6 C:\Windows\system32\USER32.dll+00571126 BroadcastSystemMessageExA+00000570
[ 34] 0x00007fff8ee63a85 C:\Windows\system32\USER32.dll+00014981 IsWindow+00001653
[ 35] 0x00007fff8ee63af6 C:\Windows\system32\USER32.dll+00015094 IsWindow+00001766
[ 36] 0x00007fff8f4798ef C:\Windows\SYSTEM32\ntdll.dll+00628975 KiUserCallbackDispatcher+00000031
[ 37] 0x00007fff8ee6303a C:\Windows\system32\USER32.dll+00012346 PeekMessageW+00000202
[ 38] 0x00007fff8ee67433 C:\Windows\system32\USER32.dll+00029747 GetMessageA+00000251
[ 39] 0x00007fff8ee673d7 C:\Windows\system32\USER32.dll+00029655 GetMessageA+00000159
[ 40] 0x0000000005789a1b C:\Program Files\MATLAB\R2013a\bin\win64\uiw.dll+00236059 UIW_SetCurrentDialog+00000731
[ 41] 0x00000000057b1532 C:\Program Files\MATLAB\R2013a\bin\win64\uiw.dll+00398642 ws_FreeSystemFont+00000482
[ 42] 0x00000001800d8930 C:\Program Files\MATLAB\R2013a\bin\win64\libmwservices.dll+00887088 services::system_events::PpeDispatchHook::~PpeDispatchHook+00055600
[ 43] 0x00000001800d92f5 C:\Program Files\MATLAB\R2013a\bin\win64\libmwservices.dll+00889589 services::system_events::PpeDispatchHook::~PpeDispatchHook+00058101
[ 44] 0x00000001800da100 C:\Program Files\MATLAB\R2013a\bin\win64\libmwservices.dll+00893184 services::system_events::PpeDispatchHook::~PpeDispatchHook+00061696
[ 45] 0x00000001800e28d2 C:\Program Files\MATLAB\R2013a\bin\win64\libmwservices.dll+00927954 svWS_ProcessPendingEvents+00001090
[ 46] 0x000000007498329d C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00078493 mcr::setInterpreterThreadToCurrent+00035885
[ 47] 0x0000000074983562 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00079202 mcr::setInterpreterThreadToCurrent+00036594
[ 48] 0x0000000074976915 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00026901 mcrInstantiationError::operator=+00003781
[ 49] 0x0000000074979d52 C:\Program Files\MATLAB\R2013a\bin\win64\mcr.dll+00040274 mcr_invoke_on_interpreter_thread+00001602
[ 50] 0x0000000140005591 C:\Program Files\MATLAB\R2013a\bin\win64\MATLAB.exe+00021905
[ 51] 0x0000000140005c3a C:\Program Files\MATLAB\R2013a\bin\win64\MATLAB.exe+00023610
[ 52] 0x0000000140006103 C:\Program Files\MATLAB\R2013a\bin\win64\MATLAB.exe+00024835
[ 53] 0x00007fff8d601611 C:\Windows\system32\KERNEL32.DLL+00005649 BaseThreadInitThunk+00000013
[ 54] 0x00007fff8f4564ad C:\Windows\SYSTEM32\ntdll.dll+00484525 RtlUserThreadStart+00000029
This error was detected while a MEX-file was running. If the MEX-file
is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files.
If this problem is reproducible, please submit a Service Request via:
http://www.mathworks.com/support/contact_us/
A technical support engineer might contact you with further information.
Thank you for your help.
最佳答案
暂定答案，但看看这篇文章:
for (i = 0; i < rmax; i++){
for( j = 0 ; j <cmax ; j++ ){
idx1[i][j]= I[i][j]; }}
I 是 [9][8]，但 cmax 可以达到 9 (M = 9):
cmax=(M<(col+S))?M:(col+S);
因此，您正在访问越界元素。
第二种可能性:
int q=rmax*cmax;
q 在 rmax 和 cmax 分配值之前声明。因此，您使用 q 的分配可能是问题所在。
关于c - Mex 内存泄漏..我需要一些帮助来发现错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30552450/