我有3个文件proj2.c,duplicate.h,duplicate.c proj2.c:
function ContextMenuItems({ children }): JSX.Element | null {
if (!React.Children.count(children)) return null;
...
}
duplicate.h:
#include <stdio.h>
#include "duplicate.h"
#include<stdlib.h>
int main(int argc, char **argv)
{
if (argc <= 1)
{
return 1;
}
char **copy = duplicate_args(argc, argv);
char **p = copy;
argv++;
p++;
while (*argv)
{
//printf("%s %s\n", argv[1], copy[1]);
printf("%s %s\n", *argv++, *p++);
}
free_duplicated_args(copy);
//free(copy);
return 0;
}
duplicate.c:
char **duplicate_args(int argc, char **argv);
void free_duplicated_args(char **copy);
程序非常简单。接受n个参数并更改字符串的大写形式。我正在创建一个新数组来存储argv的副本(使用malloc)。现在,当我运行valgrind时:valgrind --leak-check = full ./proj2 1 它说丢失了1个字节。
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
char **duplicate_args(int argc, char **argv)
{
char **arrPointer=malloc((argc-1)*sizeof(char*));
for(int i=1;i<argc;i++)
{
arrPointer[i] = (char*)malloc(strlen(argv[i])*sizeof(char));
for(int j=0;j<strlen(argv[i]);j++)
{
if(argv[i][j] > 64 && argv[i][j] < 91)
{
arrPointer[i][j]=argv[i][j]+32;
}
else if(argv[i][j] > 96 && argv[i][j] < 123)
{
arrPointer[i][j]=argv[i][j]-32;
}
else
{
arrPointer[i][j]=argv[i][j];
}
}
// arrPointer[i]=argv[i];
}
return arrPointer;
}
void free_duplicated_args(char **copy)
{
free(copy);
}
答案 0 :(得分:3)
您的duplicate_args
调用malloc
argc
次,而free_duplicated_args
仅调用free
一次,这就是内存泄漏的原因。应该是
void free_duplicated_args(int argc, char **copy)
{
for (int i = 1; i < argc; i++)
free (copy [i]);
free(copy);
}