在我的程序成功执行结束时，我得到了这个不需要的输出，同时释放了动态分配的动态内存。
*** glibc detected *** /home/ahor/Desktop/Project Work/node: free(): invalid pointer: 0xb7fda000 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x75ee2)[0xb7e93ee2]
/home/ahor/Desktop/Project Work/node[0x8048cf9]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb7e374d3]
/home/ahor/Desktop/Project Work/node[0x8048561]
======= Memory map: ========
08048000-0804a000 r-xp 00000000 08:06 786473 /home/ahor/Desktop/Project Work/node
0804a000-0804b000 r--p 00001000 08:06 786473 /home/ahor/Desktop/Project Work/node
0804b000-0804c000 rw-p 00002000 08:06 786473 /home/ahor/Desktop/Project Work/node
0804c000-0806d000 rw-p 00000000 00:00 0 [heap]
b7deb000-b7e07000 r-xp 00000000 08:06 2228253 /lib/i386-linux-gnu/libgcc_s.so.1
b7e07000-b7e08000 r--p 0001b000 08:06 2228253 /lib/i386-linux-gnu/libgcc_s.so.1
b7e08000-b7e09000 rw-p 0001c000 08:06 2228253 /lib/i386-linux-gnu/libgcc_s.so.1
b7e1d000-b7e1e000 rw-p 00000000 00:00 0
b7e1e000-b7fc1000 r-xp 00000000 08:06 2228351 /lib/i386-linux-gnu/libc-2.15.so
b7fc1000-b7fc3000 r--p 001a3000 08:06 2228351 /lib/i386-linux-gnu/libc-2.15.so
b7fc3000-b7fc4000 rw-p 001a5000 08:06 2228351 /lib/i386-linux-gnu/libc-2.15.so
b7fc4000-b7fc7000 rw-p 00000000 00:00 0
b7fd7000-b7fd8000 rw-p 00000000 00:00 0
b7fd8000-b7fd9000 rw-s 00000000 00:04 12517386 /SYSV001120bd (deleted)
b7fd9000-b7fda000 rw-p 00000000 00:00 0
b7fda000-b7fdb000 rw-s 00000000 00:04 12484617 /SYSV00307eff (deleted)
b7fdb000-b7fdd000 rw-p 00000000 00:00 0
b7fdd000-b7fde000 r-xp 00000000 00:00 0 [vdso]
b7fde000-b7ffe000 r-xp 00000000 08:06 2228363 /lib/i386-linux-gnu/ld-2.15.so
b7ffe000-b7fff000 r--p 0001f000 08:06 2228363 /lib/i386-linux-gnu/ld-2.15.so
b7fff000-b8000000 rw-p 00020000 08:06 2228363 /lib/i386-linux-gnu/ld-2.15.so
bffdf000-c0000000 rw-p 00000000 00:00 0 [stack]
......
......
......
当我使用 gdb 回溯时收到此消息。
Program received signal SIGABRT, Aborted.
0xb7fdd424 in __kernel_vsyscall ()
(gdb) bt
#0 0xb7fdd424 in __kernel_vsyscall ()
#1 0xb7e4c1df in raise () from /lib/i386-linux-gnu/libc.so.6
#2 0xb7e4f825 in abort () from /lib/i386-linux-gnu/libc.so.6
#3 0xb7e8939a in ?? () from /lib/i386-linux-gnu/libc.so.6
#4 0xb7e93ee2 in ?? () from /lib/i386-linux-gnu/libc.so.6
#5 0x08048cf9 in main (argc=6, argv=0xbffff214) at node.c:180
...... ...... 这是我的代码段，它会影响这个吗？我无法查明原因，如果您能帮助我，我将不胜感激。
// creating the dynamic memory for net
if((net = (struct dot **)malloc(v * sizeof(struct dot))) == NULL) {
perror("struct dot malloc() failed\n");
exit(1);
}
for(i = 0 ; i < v; i++)
if((net[i] = (struct dot *)malloc(v * sizeof(struct dot))) == NULL) {
perror("net[i] malloc() failed.\n");
for(j = 0; j < i; j++)
free(net[j]);
free(net);
}
.....
.....
// creating the dynamic memory for link_status
if((link_status = (struct link **)malloc(v * sizeof(struct link))) == NULL) {
perror("struct link malloc() failed\n");
exit(1);
}
for(i = 0 ; i < v; i++)
if((link_status[i] = (struct link *)malloc(v * sizeof(struct link))) == NULL) {
perror("link_status[i] malloc() failed.\n");
for(j = 0; j < i; j++)
free(link_status[j]);
free(link_status);
}
......
检测到的 glibc 来自下面使用的 free() 函数。
// free the allocated dynamic memories
for(i = 0; i < v; i++) {
free(net[i]);
free(link_status[i]);
}
free(net);
free(link_status);
请帮我！