首先让我为格式化和难度代码道歉。我是C和Stack的新手。这里大部分的混乱代码可能与问题无关,但必须包含在上下文中。realloc期间的分段错误
在第一次调用realloc(注释中注明)后,下面的代码会出现分段错误。 return_file->target_line
只是一个3D数组,i
是3D数组第一维的元素数。所以我打电话realloc来存储额外的二维数组(类型char **
)。
NULL
内存分配的返回被故意省略B/C开发协议明确指出所有的内存分配将会成功(我有疑问)。
我正在使用自己的内存检查程序。错误代码我得到的是:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7ac63fb in reallochook() from /lib64/libc.so.6
我已经看了它很长一段时间,但似乎无法找出问题所在。
Mockfile *read_mockfile(const char filename[]) {
Mockfile *return_file = NULL;
FILE *input;
if(filename != NULL && (input = fopen(filename, "r")) != NULL) {
char **split_tmp, line[MAX] = {0};
return_file = malloc(sizeof(Mockfile));
return_file->rule_count = 0;
/*read lines*/
while(fgets(line, MAX, input) != NULL){
if(line[0] != '#' && line[0] != '\n'){
int j, i = return_file->rule_count;
split_tmp = split(line);
if(line[0] != '\t'){
j = 0;
/*target line. Realloc every string in three steps. Segementation fault occurs after this line below.*/
return_file->target_line = realloc(return_file->target_line, (i + 1) * sizeof(char **));
while(split_tmp[j] != NULL){
return_file->target_line[i] = realloc(return_file->target_line[i], (j + 1) * sizeof(char *));
return_file->target_line[i][j] = malloc(strlen(split_tmp[j]) + 1);
strcpy(return_file->target_line[i][j], split_tmp[j]);
j++;
}
return_file->target_line[i] = realloc(return_file->target_line[i], (j + 1) * sizeof(char *));
return_file->target_line[i][j] = NULL;
} else {
j = 0;
/*action line. Allocate every string in three steps*/
return_file->action_line = realloc(return_file->action_line, (i + 1) * sizeof(char **));
while(split_tmp[j] != NULL){
return_file->action_line[i] = realloc(return_file->action_line[i], (j + 1) * sizeof(char *));
return_file->action_line[i][j] = malloc(strlen(split_tmp[j]) + 1);
strcpy(return_file->action_line[i][j], split_tmp[j]);
j++;
}
return_file->action_line[i] = realloc(return_file->action_line[i], (j + 1) * sizeof(char *));
return_file->action_line[i][j] = NULL;
return_file->rule_count++;
}
}
}
fclose(input);
}
return return_file;
}
@MD XF,你刚刚在谈论大括号不在新行吗? B/C这是我故意保留的个人偏好。 –
无论为你工作......适合你。但是还有一些关键的改进,一些小的细节造成了很大的差异 –