这是一个字符串拷贝的代码片段,将o_line的内容拷贝到q中。但是该行代码会产生-Werror=stringop-truncation警告。 这个警告表示目标缓冲区的大小可能不足以容纳源字符串的全部内容,从而导致截断。为了避免这个警告,可以考虑使用更安全的函数来进行字符串拷贝,例如strncpy_s。 下面是使用strncpy_s函数进行修改后的示例代...
I tested your patch and it works, no compiler warnings in same setup as above (gcc-9.3.0).Strncpyalways doing the null termination, seems to make the GCC stringop-truncation heuristics happy. Locally, I had also tried this patch, which works, but I prefer yours. ...
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In function ‘strncpy’, inlined from ‘do_test’ at tests/tool_pmu.c:25:3: /usr/include/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’ specified bound 128 equals destination size [-Werror=stringop-truncation] 95 | return __builtin___strncpy_chk (__dest, __src, __l...
> inlined from ‘do_test’ at tests/tool_pmu.c:25:3: > /usr/include/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’ > specified bound 128 equals destination size [-Werror=stringop-truncation] > 95 | return __builtin___strncpy_chk (__dest, __src, __len, ...
gcc是GUN C和C++编译器，我们通常使用GCC时，编译器会依次做如下工作：preprocess(预处理)，compilation(编译)，assembly(汇编)，link(链接)。gcc提供了一些选项参数能够让编译器停在某个过程(如编译过程)，比如 -c选项表示只走到“汇编”这一步，生成的是汇编后的目标文件。本文主要介绍gcc常用的选项参数及其作用。
[-Werror=stringop-truncation] strncpy(ev->data, evsel->name, len); ^~~~ util/header.c:3618:15: note: length computed here size_t len = strlen(evsel->name); ^~~~ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel....
[-Werror=stringop-truncation] strncpy(t->th_buf.magic, "ustar ", 6); ^~~~ libtar/encode.c:40:3: error: 'strncpy' output truncated before terminating nul copying 2 bytes from a string of the same length [-Werror=stringop-truncation] strncpy(t->th_buf.version, TVERSION, TVERSLEN)...
> inlined from ‘do_test’ at tests/tool_pmu.c:25:3: > /usr/include/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’ > specified bound 128 equals destination size [-Werror=stringop-truncation] > 95 | return __builtin___strncpy_chk (__dest, __src, __len, ...
… 4 bytes from a string of the same length [-Werror=stringop-truncation] Loading branch information 0x1abin committed Jun 16, 2021 commit adbc5aab8de639f0048fd4f7c10917ccaacd80f7 2 changes: 1 addition & 1 deletion 2 .gitmodules Original file line numberDiff line numberDif...