https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253337
--- Comment #10 from Alex S <[email protected]> --- (In reply to Conrad Meyer from comment #8) I noticed neither Linux nor FreeBSD actually bothers with accurate stack mappings in /proc/self/map. About multiple threads Linux's documentation plainly states "[stack:<tid>] (from Linux 3.4 to 4.4) … This field was removed in Linux 4.5, since providing this information for a process with large numbers of threads is expensive." However, this looks a bit fishy even with a basic single-threaded test: xubuntu@xubuntu:~$ cat address.c #define _GNU_SOURCE #include <assert.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main() { int i = 1; fprintf(stderr, "[[%p]]\n", &i); system("cat /proc/self/maps | tail -n 5"); return 0; } xubuntu@xubuntu:~$ gcc address.c -o test xubuntu@xubuntu:~$ ./test [[0x7ffe7a0cbca4]] 7f4f3c7af000-7f4f3c7b0000 rw-p 00000000 00:00 0 7ffe37e2e000-7ffe37e4f000 rw-p 00000000 00:00 0 [stack] 7ffe37fd0000-7ffe37fd3000 r--p 00000000 00:00 0 [vvar] 7ffe37fd3000-7ffe37fd4000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall] I mean, 0x7ffe7a0cbca4 is right between [vdso] and [vsyscall]. Since apparently we are already in the pure fantasy land, it's probably not a big deal to mess this a bit more. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-emulation To unsubscribe, send any mail to "[email protected]"
