GCC 8.0 中通过 r254630 为错误 81117 添加的 -Wstringop-truncation 警告专门用于突出可能意外使用 strncpy 函数,该函数从源字符串中截断终止 NUL 字符。请求中给出的此类滥用的示例如下:char buf[2]; void test (const char* str) { strncpy (buf, str, strlen (str)); } 我...
(char*, const char*, size_t)' specified bound 46 equals destination size [-Wstringop-truncation] 1612 | strncpy(destbuf, inet_ntop_ez(&dcrn->routes[i].dest, sizeof(dcrn->routes[i].dest)), sizeof(destbuf)); | ~~~^~~~ netutil.cc:1613:14: warning: 'char* strncpy(char*, cons...
GCC 8 has added a new string truncation checker - -Wstringop-truncation which is leading to string truncation warnings for certain API's like strncpy, snprintf and sprintf. Depending on how memory is allocated to the destination buffer, either increasing the fixed buffer size or using pbs_asprin...
GCC支持在编译的时候使用-std选项来选择编译语言的标准。程序本身也是在发展的，不断变化的。以 C 语言...
-Wformat-truncation=1 -Wformat启用的-Wformat-truncation的 Level 1采用了一种保守的方法,只警告对有界函数的调用,该函数的返回值未使用,并且很可能导致输出截断。 -Wformat-truncation=2 级别2还警告对使用返回值的有界函数的调用,并且在给定足够长度或幅度的参数时可能导致截断。
The -Warray-bounds and -Wstringop-overflow warnings that run during a subsequent pass over the transformed code then notice the impossibly excessive size in the second strncpy call and, on the assumption that it comes from the source code, issue the (somewhat confusing) diagnostics. f (char...
Wstringop-overflow=n -Wstringop-truncation -Wsuggest-attribute=[pure|const|noreturn|format|malloc] -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override -Wmissing-format-attribute -Wsubobject-linkage -Wswitch -Wswitch-bool -Wswitch-default -Wswitch-enum -Wswitch-unreachable -Wsync-nand...
Wstringop-overflow=n -Wsuggest-attribute=[pure|const|noreturn|format] -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override -Wmissing-format-attribute -Wsubobject-linkage -Wswitch -Wswitch-bool -Wswitch-default -Wswitch-enum -Wswitch-unreachable -Wsync-nand -Wsystem-headers -Wtauto...
Wstring-compare -Wno-stringop-overflow -Wno-stringop-overread -Wno-stringop-truncation -Wsuggest-attribute=[pure|const|noreturn|format|malloc] -Wswitch -Wno-switch-bool -Wswitch-default -Wswitch-enum -Wno-switch-outside-range -Wno-switch-unreachable -Wsync-nand -Wsystem-headers -Wtautological-...
如果你得到的不是一个字符串，不要把它当作字符串，也就是说，不要使用strncpy，而是使用memcpy。