“valgrind invalid read of size 1”错误是Valgrind内存检测工具报告的一种错误,表示程序试图读取一个大小为1字节的内存区域,但这个区域并未被分配或已经被释放,从而导致了非法访问。这通常意味着程序中存在内存管理问题,如越界访问、野指针使用等。 2. 可能导致“valgrind invalid read of size 1”错误的原因 数组...
GET /cs3157/tng/index.html ==760== Invalid read of size 1 ==760== at 0x4C2E7D4: strstr (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==760== by 0x400E67: HandleTCPClient (http-server.c:101) ==760== by 0x400D42: main (http-server.c:75) ==760== A...
Valgrind Invalid read of size 1 (sscanf) Somehow Valgrind shows an error at the first lines of my program: intmain(intargc,char** argv){inti, r;sscanf(argv[1],"%d", &r);return0; } Valgrind reports: ==18674== Invalidreadof size 1 ==18674== at 0x4ECB1A0: rawmemchr (in/usr/li...
Since the return type of strlen is of type size_t and 1 is an int and per majority rule the int value will be promoted to size_t (the larger type) before the expression is evaluated, if sizeof(size_t) is larger than sizeof(int), the result of (strlen(tribe_name) + 1) will b...
invalid read of size :非法读内存:一般为数组越界 definitely lost /possibly lost /still reachable in loss record:内存未释放 definitely :确认丢失。程序中存在内存泄露,应尽快修复。 indirectly:间接丢失。当使用了含有指针成员的类或结构时可能会报这个错误 。
==550063== Invalid read of size 1 ==550063== at 0x400679: main (malloc2.c:15) ==550063== Address 0x520b040 is 0 bytes inside a block of size 1 free'd ==550063== at 0x4C38A03: free (vg_replace_malloc.c:755) ==550063== by 0x400674: main (malloc2.c:13) ...
==550063== Invalid read of size 1 ==550063== at 0x400679: main (malloc2.c:15) ==550063== Address 0x520b040 is 0 bytes inside a block of size 1 free'd==550063==at 0x4C38A03:free(vg_replace_malloc.c:755)==550063==by 0x400674: main(malloc2.c:13)==550063==Block was alloc...
==550063== Invalid read of size 1 ==550063== at 0x400679: main (malloc2.c:15) ==550063== Address 0x520b040 is 0 bytes inside a block of size 1 free'd ==550063== at 0x4C38A03: free (vg_replace_malloc.c:755) ==550063== by 0x400674: main (malloc2.c:13) ...
最后一行代码在打印buffer[5]时发生内存读越界,即字符数组越界访问,Memcheck 报错为Invalid read of size 1。 这里只演示了部分内存非法读写的场景,其它的诸多内存非法读写的场景,读者可自己尝试编码复现。 原则2,变量未初始化错误一定要解决 这类错误在检查报告中以Use of uninitialised value of size x或者Conditi...
checkingwhethertoenablemaintainer-specificportionsofMakefiles...no checkingwhetherln-sworks...yes ... 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 配置成功后执行make编译 make 1. 安装即可 makeinstall 1. 2 内存泄漏检测 这是valgrind最常用一个小功能。程序如下,详见 c_utils/debug/valgrind/tes...