valgrind內存檢查

安裝
apt-get install valgrind

測試程序

#include <stdio.h>
#include <stdlib.h>
 
int*Test(void)
{
    int* x = malloc(10 * sizeof(int));
    delete x;// problem 1: heap block overrun, problem 2: memory leak --x not free, only first address
 
    return x;
}


int main(void)
{
    int count;
    Test();
    printf("i =%d/n", count); //problem 3: use uninitialised value.
 
    return 0;
}

內存檢查命令
valgrind --tool=memcheck ./prog_name
valgrind --tool=memcheck --leak-check=yes ./prog_name輸出內存泄露的申請堆棧

valgrind --db-attach=yes --tool=memcheck ./prog_name出錯後附加gdb

性能測試命令

valgrind --tool=callgrind ./prog_name

callgrind_annotate callgrind.out 轉換爲文本