Em Fri, Jan 05, 2024 at 04:01:37PM +0100, Jiri Olsa escreveu: > On Fri, Jan 05, 2024 at 09:48:31AM +0100, Jiri Olsa wrote: > > On Thu, Jan 04, 2024 at 10:01:35AM -0300, Arnaldo Carvalho de Melo wrote: > > > > SNIP > > > > > 9 51.66 amazonlinux:2 : Ok gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-17) , clang version 11.1.0 (Amazon Linux 2 11.1.0-1.amzn2.0.2) flex 2.5.37 > > > 10 60.77 amazonlinux:2023 : Ok gcc (GCC) 11.4.1 20230605 (Red Hat 11.4.1-2) , clang version 15.0.7 (Amazon Linux 15.0.7-3.amzn2023.0.1) flex 2.6.4 > > > 11 61.29 amazonlinux:devel : Ok gcc (GCC) 11.3.1 20221121 (Red Hat 11.3.1-4) , clang version 15.0.6 (Amazon Linux 15.0.6-3.amzn2023.0.2) flex 2.6.4 > > > 12 74.72 archlinux:base : Ok gcc (GCC) 13.2.1 20230801 , clang version 16.0.6 flex 2.6.4 > > > > > > / $ grep -B8 -A2 -w basename /usr/include/string.h > > > #ifdef _GNU_SOURCE > > > #define strdupa(x) strcpy(alloca(strlen(x)+1),x) > > > int strverscmp (const char *, const char *); > > > char *strchrnul(const char *, int); > > > char *strcasestr(const char *, const char *); > > > void *memrchr(const void *, int, size_t); > > > void *mempcpy(void *, const void *, size_t); > > > #ifndef __cplusplus > > > char *basename(); > > > #endif > > > #endif > > > / $ cat /etc/os-release > > > NAME="Alpine Linux" > > > ID=alpine > > > VERSION_ID=3.19.0 > > > PRETTY_NAME="Alpine Linux v3.19" > > > HOME_URL="https://alpinelinux.org/"; > > > BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"; > > > / $ > > > > > > Weird, they had it and now removed the _GNU_SOURCE bits (edge is their > > > devel distro, like rawhide is for fedora, tumbleweed for opensuse, etc). > > > > let's see, I asked them in here: https://gitlab.alpinelinux.org/alpine/aports/-/issues/15643 > > it got removed in musl libc recently: > https://git.musl-libc.org/cgit/musl/commit/?id=725e17ed6dff4d0cd22487bb64470881e86a92e7 > > so perhaps switching to POSIX version of basename is the easiest way out? I think so, in all of perf we use the POSIX one, strdup'ing the arg, etc. Something like the patch below? - Arnaldo diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c index ee3ce2b8000d75d2..a5cc5938c3d7951e 100644 --- a/tools/bpf/bpftool/gen.c +++ b/tools/bpf/bpftool/gen.c @@ -7,6 +7,7 @@ #include <ctype.h> #include <errno.h> #include <fcntl.h> +#include <libgen.h> #include <linux/err.h> #include <stdbool.h> #include <stdio.h> @@ -56,9 +57,10 @@ static bool str_has_suffix(const char *str, const char *suffix) static void get_obj_name(char *name, const char *file) { - /* Using basename() GNU version which doesn't modify arg. */ - strncpy(name, basename(file), MAX_OBJ_NAME_LEN - 1); - name[MAX_OBJ_NAME_LEN - 1] = '\0'; + char file_copy[PATH_MAX]; + /* Using basename() POSIX version to be more portable. */ + strncpy(file_copy, file, PATH_MAX - 1)[PATH_MAX - 1] = '\0'; + strncpy(name, basename(file_copy), MAX_OBJ_NAME_LEN - 1)[MAX_OBJ_NAME_LEN - 1] = '\0'; if (str_has_suffix(name, ".o")) name[strlen(name) - 2] = '\0'; sanitize_identifier(name);
