动态申请内存，释放出现错误

快来打我* 2022-08-08 14:54 8阅读 0赞

\*\*\* glibc detected \*\*\* ./a.out: free(): invalid next size (fast): 0x0000000000ae0010 \*\*\*  
======= Backtrace: =========  
/lib/x86\_64-linux-gnu/libc.so.6(+0x7e846)\[0x7fed53fd1846\]  
./a.out\[0x4006db\]  
/lib/x86\_64-linux-gnu/libc.so.6(\_\_libc\_start\_main+0xed)\[0x7fed53f7476d\]  
./a.out\[0x400559\]  
======= Memory map: ========  
00400000-00401000 r-xp 00000000 08:03 1179757 /home/hlwang/tian/tmp/c/c\_and\_pointer\_test/a.out  
00600000-00601000 r--p 00000000 08:03 1179757 /home/hlwang/tian/tmp/c/c\_and\_pointer\_test/a.out  
00601000-00602000 rw-p 00001000 08:03 1179757 /home/hlwang/tian/tmp/c/c\_and\_pointer\_test/a.out  
00ae0000-00b01000 rw-p 00000000 00:00 0 \[heap\]  
7fed53d3d000-7fed53d52000 r-xp 00000000 08:03 72284 /lib/x86\_64-linux-gnu/libgcc\_s.so.1  
7fed53d52000-7fed53f51000 ---p 00015000 08:03 72284 /lib/x86\_64-linux-gnu/libgcc\_s.so.1  
7fed53f51000-7fed53f52000 r--p 00014000 08:03 72284 /lib/x86\_64-linux-gnu/libgcc\_s.so.1  
7fed53f52000-7fed53f53000 rw-p 00015000 08:03 72284 /lib/x86\_64-linux-gnu/libgcc\_s.so.1  
7fed53f53000-7fed54108000 r-xp 00000000 08:03 28242 /lib/x86\_64-linux-gnu/libc-2.15.so  
7fed54108000-7fed54307000 ---p 001b5000 08:03 28242 /lib/x86\_64-linux-gnu/libc-2.15.so  
7fed54307000-7fed5430b000 r--p 001b4000 08:03 28242 /lib/x86\_64-linux-gnu/libc-2.15.so  
7fed5430b000-7fed5430d000 rw-p 001b8000 08:03 28242 /lib/x86\_64-linux-gnu/libc-2.15.so  
7fed5430d000-7fed54312000 rw-p 00000000 00:00 0  
7fed54312000-7fed54334000 r-xp 00000000 08:03 28254 /lib/x86\_64-linux-gnu/ld-2.15.so  
7fed5450f000-7fed54512000 rw-p 00000000 00:00 0  
7fed54530000-7fed54534000 rw-p 00000000 00:00 0  
7fed54534000-7fed54535000 r--p 00022000 08:03 28254 /lib/x86\_64-linux-gnu/ld-2.15.so  
7fed54535000-7fed54537000 rw-p 00023000 08:03 28254 /lib/x86\_64-linux-gnu/ld-2.15.so  
7fff8cc0e000-7fff8cc2f000 rw-p 00000000 00:00 0 \[stack\]  
7fff8cda0000-7fff8cda1000 r-xp 00000000 00:00 0 \[vdso\]  
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 \[vsyscall\]  
已放弃 (核心已转储)

源代码：

\#include<stdio.h>  
\#include<stdlib.h>  
  
\#define SIZE 10  
  
int main(char argc, char \*argv\[\] )  
\{  
  
int \*p = NULL, \*tmp;  
  
int i;  
p=(int\*)malloc(sizeof(char)\*SIZE);  
  
if(p == NULL)  
\{  
perror("malloc failed!");  
exit(0);  
\}  
  
tmp=p;  
for(i = 0;i<SIZE;i++)\{  
\*p= i;  
printf("the init p==%d\\n",\*p);  
p++;  
\}  
for(i = 0;i<SIZE;i++)\{  
printf("the result p\[i\]==%d\\n",tmp\[i\]);  
\}  
free(tmp);  
return 0;  
\}

报错：

p=(int\*)malloc(sizeof(char)\*SIZE);

修改：

p=(int\*)malloc(sizeof(int)\*SIZE);

解决了， 正确使用malloc 函数