==3905== ERROR SUMMARY: 14 errors from 2 contexts (suppressed: 2 from 2)
==3905==
==3905== 6 errors in context 1 of 2:
==3905== Invalid write of size 4
==3905== at 0x401BFE: EliminateXr (in /home/suraj/Desktop/project/fm)
==3905== by 0x402040: fm_elim (in /home/suraj/Desktop/project/fm)
==3905== by 0x401395: name_fm (in /home/suraj/Desktop/project/fm)
==3905== by 0x400C38: main (in /home/suraj/Desktop/project/fm)
==3905== Address 0x51fc724 is 36 bytes inside a block of size 39 alloc'd
==3905== at 0x4C2A2DB: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3905== by 0x401064: alloc_matrix (in /home/suraj/Desktop/project/fm)
==3905== by 0x401A59: EliminateXr (in /home/suraj/Desktop/project/fm)
==3905== by 0x402040: fm_elim (in /home/suraj/Desktop/project/fm)
==3905== by 0x401395: name_fm (in /home/suraj/Desktop/project/fm)
==3905== by 0x400C38: main (in /home/suraj/Desktop/project/fm)
==3905==
==3905==
==3905== 8 errors in context 2 of 2:
==3905== Invalid write of size 4
==3905== at 0x401B17: EliminateXr (in /home/suraj/Desktop/project/fm)
==3905== by 0x402040: fm_elim (in /home/suraj/Desktop/project/fm)
==3905== by 0x401395: name_fm (in /home/suraj/Desktop/project/fm)
==3905== by 0x400C38: main (in /home/suraj/Desktop/project/fm)
==3905== Address 0x51fce4c is 12 bytes inside a block of size 15 alloc'd
==3905== at 0x4C2A2DB: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3905== by 0x401064: alloc_matrix (in /home/suraj/Desktop/project/fm)
==3905== by 0x401A59: EliminateXr (in /home/suraj/Desktop/project/fm)
==3905== by 0x402040: fm_elim (in /home/suraj/Desktop/project/fm)
==3905== by 0x401395: name_fm (in /home/suraj/Desktop/project/fm)
==3905== by 0x400C38: main (in /home/suraj/Desktop/project/fm)
==3905==
--3905--
--3905-- used_suppression: 2 dl-hack3-cond-1
==3905==
==3905== ERROR SUMMARY: 14 errors from 2 contexts (suppressed: 2 from 2)
valgrind에서 오류가 발생했습니다.Valgrind가 유효하지 않습니다.
그것은 오류가 EliminateXr에 있다고 말했지만 실제로 오류를 볼 수 없습니다. EliminateXr :
void EliminateXr(float** t,float* q,float*** tnew,float** qnew,int n1,int n2,int* r,int* s,int sprime){
float** matrix = (float**)alloc_matrix(sprime,(*r)-1, sizeof(float));
float* vec= (float*)malloc(sprime*sizeof(float));
int matrixIndex=0;
int i,k,l;
for(k = 0; k < n1; ++k){
for(l = n1; l < n2; ++l){
for(i=0; i < *r; ++i){
matrix[matrixIndex][i]=t[k][i]-t[l][i];
}
vec[matrixIndex]=q[k]-q[l];
matrixIndex++;
}
}
for(k = n2; k < *s; ++k){
for(i=0; i < *r; ++i){
matrix[matrixIndex][i]=t[k][i];
}
vec[matrixIndex]=q[k];
matrixIndex++;
}
*tnew=matrix;
*qnew=vec;
*r=(*r)-1;
*s=sprime;
}
난 크기의 잘못된 쓰기를 얻을해서는 안 나는 4 사람이 내가이 정보를 사용하는 방법을 설명 할 수 플로트를위한 메모리를 할당하고 있습니다 : 주소 0x51fc724 크기의 블록 내부에 36 바이트 39 0x4C2A2DB에서 == 3905 ==를 alloc'd :
우리가 내 alloc_matrix 보면 내가 malloc에이 (/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so에서) malloc에
s = m * n * block + m * sizeof(void*) + block - 1;
p = malloc(s);
블록 = float의 크기입니다.
valgrind에 따른 오류는 어디에 있습니까?
'''를 계산할 때'- 1'은 무엇입니까? –
정렬을 위해 여분의 (블록 -1) 바이트가 할당됩니다. – user2975699
'alloc_matrix()'에있는 코드를 살펴볼 필요가 있습니다. malloc 된 메모리의 크기 계산이 잘못되었습니다. – cmaster