验证从malloc返回的指针 [英] validate pointer that was returned from malloc

问题描述

有没有一种标准方法来验证指针是否指向由malloc分配的内存是什么？

TIA

Hi,

Is there a standard way to validate if a pointer points to memory that was
allocated by malloc?
TIA

推荐答案

Bryan Bullard写道：

Bryan Bullard wrote:

有没有一种标准方法来验证指针是否指向内存是由malloc分配的吗？

Is there a standard way to validate if a pointer points to memory that was
allocated by malloc?

No.


-

Best问候，

Andrey Tarasevich

No.

--
Best regards,
Andrey Tarasevich

>有没有一种标准方法来验证指针是否指向由malloc分配的

> Is there a standard way to validate if a pointer points to memory that was

的内存？

你必须自己编写那个malloc的包装器 -

可能很有趣。 :)


Kristofer

You would have to write your own wrapper for malloc for that one - that
might be fun. :)

Kristofer

Bryan Bullard写道：

Bryan Bullard wrote:

是否有标准方式


否

验证指针是否指向malloc分配的内存？
cat onStack.c

Is there a standard way
No.
to validate if a pointer points to memory that was allocated by malloc? cat onStack.c

#include< stdio.h>

#include< stdlib.h>


int onStack（void * p）{

return（p>（void *）& p）;

}


int main（int argc，char * argv []）{

char c;

char * p =& c;

// char * p =（char *）malloc（sizeof（char））;

if（onStack（p））{

fprintf（stdout ，

p可能指向自动存储中的角色。\ nn;）;

}

else {

fprintf（stdout，

p可能指向静态数据或免费存储。\ n;）;

}

返回0;

}

#include <stdio.h>
#include <stdlib.h>

int onStack(void* p) {
return (p > (void*)&p);
}

int main(int argc, char* argv[]) {
char c;
char* p = &c;
//char* p = (char*)malloc(sizeof(char));
if (onStack(p)) {
fprintf(stdout,
"p probably points to a character in automatic storage.\n");
}
else {
fprintf(stdout,
"p probably points to static data or free storage.\n");
}
return 0;
}

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