HEAP: Free Heap block XXXX modified at XXXX after it was freed详解
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测试代码:
char* testP(char*pfuck)
{
static char chardd[123];
strcpy(chardd,pfuck);
delete pfuck;
return chardd;
}
char *p = new char[123];
testP(p);
*p = 'a'; // 野指针
调试内存地址对比图:
(以下是调试的内存窗口)
解释一下: 0xfeeefeee 0xCDCDCDCD这个知道是什么意思吧,,,
0xCDCDCDCD 就是未初使用时内存显示的数据
0xfeeefeee 就是已经释放后数据会这么显示
ox11F80D0 内存上显示的唯一一个数就是61 61是多少啊,就是小写的a, 为什么是a啊,去查ascii表吧
对与野指针这种错误,程序不会立即报错,所以直接callstack查看到的范围可能就比较大了,最好结合内存窗口, 日志,dump等多重处理。
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