C++ 如何更正*** glibc 检测到*** 程序中的错误
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How to correct *** glibc detected *** error in the program
提问by newars
Possible Duplicate:
glibc detected error
可能重复：
glibc 检测到错误
Hi, I was executing my project in GNU C++ when i received this error when i pressed an option in the switch case. As rest of the program is executing fine i am left with this error. I don't know what it is and why it occurs. Please explain and guide me as to where i may start to look in my program.
嗨，我正在 GNU C++ 中执行我的项目，当我在 switch case 中按下一个选项时收到此错误。由于程序的其余部分执行良好，我留下了这个错误。我不知道它是什么以及它为什么会发生。请解释并指导我从哪里开始查看我的程序。
Error Details:
错误详情：
*** glibc detected *** ./test.out: free(): invalid pointer: 0xbfb1c874 ***
======= Backtrace: =========
/lib/libc.so.6[0x55c0f1]
/lib/libc.so.6(cfree+0x90)[0x55fbc0]
./test.out[0x809f855]
./test.out[0x804fbc0]
./test.out[0x804f9bb]
./test.out[0x80502bb]
./test.out[0x805084e]
./test.out[0x8050d07]
/lib/libc.so.6(__libc_start_main+0xdc)[0x508e8c]
./test.out[0x8049981]
======= Memory map: ========
004f3000-00631000 r-xp 00000000 08:01 6148422 /lib/libc-2.5.so
00631000-00633000 r-xp 0013e000 08:01 6148422 /lib/libc-2.5.so
00633000-00634000 rwxp 00140000 08:01 6148422 /lib/libc-2.5.so
00634000-00637000 rwxp 00634000 00:00 0
0078d000-007a7000 r-xp 00000000 08:01 6152013 /lib/ld-2.5.so
007a7000-007a8000 r-xp 00019000 08:01 6152013 /lib/ld-2.5.so
007a8000-007a9000 rwxp 0001a000 08:01 6152013 /lib/ld-2.5.so
007f9000-0081e000 r-xp 00000000 08:01 6148435 /lib/libm-2.5.so
0081e000-0081f000 r-xp 00024000 08:01 6148435 /lib/libm-2.5.so
0081f000-00820000 rwxp 00025000 08:01 6148435 /lib/libm-2.5.so
00b18000-00b23000 r-xp 00000000 08:01 6148439 /lib/libgcc_s-4.1.2-20080825.so.1
00b23000-00b24000 rwxp 0000a000 08:01 6148439 /lib/libgcc_s-4.1.2-20080825.so.1
08048000-080c6000 r-xp 00000000 00:1e 736543 /users/guest10/shashi/Demo/src/test.out
080c6000-080c7000 rwxp 0007e000 00:1e 736543 /users/guest10/shashi/Demo/src/test.out
080c7000-080cc000 rwxp 080c7000 00:00 0
08d05000-218b1000 rwxp 08d05000 00:00 0 [heap]
b7e00000-b7e21000 rwxp b7e00000 00:00 0
b7e21000-b7f00000 ---p b7e21000 00:00 0
b7fab000-b7fac000 rwxp b7fab000 00:00 0
b7fc4000-b7fc7000 rwxp b7fc4000 00:00 0
b7fc7000-b7fc8000 r-xp b7fc7000 00:00 0 [vdso]
bfb0b000-bfb21000 rw-p bffe9000 00:00 0 [stack]
Abort
Please Help.. Thanks in Adv
请帮助..感谢Adv
回答by jdehaan
The exact solution can only be provided if you show us the code. The error is however clear. The code frees memory that is not or no longer valid. That means either the address is wrong, because for example of pointer arithmetic being done on the original pointer. Or the pointer has already been freed (double free).
只有向我们展示代码，才能提供确切的解决方案。但是错误很明显。该代码释放无效或不再有效的内存。这意味着地址要么是错误的，因为例如对原始指针进行了指针运算。或者指针已经被释放（double free）。
回答by Piotr Praszmo
You are most likely trying to freea memory that wasn't dynamically allocated. Maybe you have an unnecessary freeor a typo like: free(&buf)instead of free(buf).
您很可能正在尝试free使用未动态分配的内存。也许你有一个不必要的free或错字，比如：free(&buf)而不是free(buf).
Compile your program with -gflag and run it through debuggeror memory debugger. That will show you where the error exactly happens.
回答by Sriram
It looks like you are trying to freean invalid pointer. You can run the program with a memory check program like [Valgrind][1]like so:
它看起来像你想free的invalid pointer。您可以使用内存检查程序运行该程序，如下[Valgrind][1]所示：
valgrind --tool=memcheck --leak-check=full --track-origins=yes --show-reachable=yes --log-file=val.log ./<executable> <parameters>
Look at val.logand you should be able to figure out where your memory leaks occur. Also, you can try and step through the code with gdb/ddd (debuggers). The program will fail at the spot where the segmentation faultoccurs. To make the code debuggable, you will need to re-compile your code with the -gflag.
看一下val.log，您应该能够找出内存泄漏发生的位置。此外，您可以尝试使用gdb/ddd (debuggers). 该程序将在segmentation fault发生的地方失败。要制作代码debuggable，您需要使用-g标志重新编译您的代码。
Alternatively, you could post your code here and let the community see where you are going wrong.
或者，您可以在此处发布您的代码，让社区了解您哪里出错了。
