我检查了每一行,但无法找到我忘记删除的地方。我在此网站上找到了AllocateDynamicArray
和FreeDynamicArray
代码,并认为它是正确的。我将尽快提供valgrind输出。任何帮助将不胜感激。
template <typename T>
T **AllocateDynamicArray(int nRows, int nCols) {
T **dynamicArray;
dynamicArray = new T*[nRows];
for (int i = 0; i < nRows; i++) {
dynamicArray[i] = new T [nCols];
for (int j = 0; j < nCols; j++) {
dynamicArray[i][j] = 0;
}
}
return dynamicArray;
}
template <typename T>
void FreeDynamicArray(T** dArray, int nRows) {
for (int i = 0; i < nRows; i++) {
delete[] dArray[i];
}
delete[] dArray;
}
int main(int argc, char* argv[]) {
int numOfComps = 1;
int** input = AllocateDynamicArray<int>(rowNo, 4);
while (calculateAvgTime(false) > maxAvgTime) {
numOfComps++;
}
FreeDynamicArray(input, rowNo);
return EXIT_SUCCESS;
}
double calculateAvgTime(bool print) {
double waitingTime = 0;
int* computers = new int[numOfComps];
for (int i = 0; i < numOfComps; i++) {
computers[i] = 0;
}
int** infoList = AllocateDynamicArray<int>(numOfComps, 2);
//some code related to computers and infoList
double waitingTime /= (double) (rowNo);
FreeDynamicArray(infoList, numOfComps);
delete[] computers;
return waitingTime;
}
以下是valgrind的输出。
==21109==
==21109== HEAP SUMMARY:
==21109== in use at exit: 1,344 bytes in 4 blocks
==21109== total heap usage: 72 allocs, 68 frees, 11,752 bytes allocated
==21109==
==21109== 336 bytes in 1 blocks are definitely lost in loss record 1 of 2
==21109== at 0x4C28D27: operator new[](unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==21109== by 0x402159: Heap::Heap(int) (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109== by 0x401977: calculateAvgTime(bool) (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109== by 0x401792: main (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109==
==21109== 1,008 bytes in 3 blocks are definitely lost in loss record 2 of 2
==21109== at 0x4C28D27: operator new[](unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==21109== by 0x402159: Heap::Heap(int) (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109== by 0x401977: calculateAvgTime(bool) (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109== by 0x401724: main (in /home/cs/c_turhan/bin/HW3/simulator/simulator)
==21109==
==21109== LEAK SUMMARY:
==21109== definitely lost: 1,344 bytes in 4 blocks
==21109== indirectly lost: 0 bytes in 0 blocks
==21109== possibly lost: 0 bytes in 0 blocks
==21109== still reachable: 0 bytes in 0 blocks
==21109== suppressed: 0 bytes in 0 blocks
==21109==
==21109== For counts of detected and suppressed errors, rerun with: -v
==21109== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 6 from 6)
答案 0 :(得分:5)
在calculateAvgTime
中,您在computers
中分配一个数组,但只释放一个项目。只要您使用delete[]
,就可以使用new[]
。
更好的是,只需使用vector
并观察此程序的内存管理问题就会消失。
答案 1 :(得分:0)
我没有看到&#39; rowNo&#39;已定义,因此可能存在&#34; FreeDynamicArray()&#34;不删除所有内存,如果您使用VS尝试获取可视检漏(here),它将帮助您追踪泄漏的内存并帮助您查明错误。