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The -fF magic fails for 64-bit strace handling a 32-bit binary using the vfork syscall. Trivial test: echo 'int main(){if(vfork())wait((int*)0);else _exit(0); return 0;}'| cc -xc - -m32 -o x; strace -fFq ./x
Seems to be fixed in upstream and in strace-4.5.18 which makes its way to Fedora 9 and 8 just now. At this moment, strace in Fedora 9 is at version 4.5.16, which fails to follow vfork. Test program: #include <stdio.h> int main() { int r = vfork(); fprintf(stderr, "vfork():%d\n", r); _exit(0); } On my Fedora 9 machine: Building 32-bit binary: # i486-linux-uclibc-gcc -Os t.c t.c: In function 'main': t.c:5: warning: incompatible implicit declaration of built-in function '_exit' Testing strace: # strace -f -oz ./a.out [ Process PID=20876 runs in 32 bit mode. ] vfork():-1 # strace -V strace -- version 4.5.16 # yum update strace Loaded plugins: refresh-packagekit ... Could not find update match for strace No Packages marked for Update A locally built upstream version: # /root/srcdevel/strace/fix/strace.t0/strace -f -oz ./a.out [ Process PID=21678 runs in 32 bit mode. ] vfork():vfork():0 21679 # /root/srcdevel/strace/fix/strace.t0/strace -V strace -- version 4.5.18
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Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.