Fix regression introduced by "Properly handle real SIGTRAPs" change
Commit 3454e4b463e6c22c7ea8c5461ef5a077f4650a54
introduced a bug: sometimes, TRACECLONE/TRACE[V]FORK opts were not set.
The check (tcp->parent == NULL) in old code was meant to check
"if we are not a child created by auto-attach" - in this case,
options need to be set on the child; otherwise they are inherited
and do not need to be set.
I misunderstood the check and if tcp->parent is not NULL, I was
setting only ptrace_setoptions_for_all bits.
This change fixes the problem. Since the fixed logic makes it
unnecessary to keep two sets of options in separate variables,
I merge them back into one variable, ptrace_setoptions.
* defs.h: Merge ptrace_setoptions_followfork and ptrace_setoptions_for_all
into one variable, ptrace_setoptions.
* strace.c: Likewise.
(test_ptrace_setoptions_followfork): Use ptrace_setoptions variable.
(test_ptrace_setoptions_for_all): Likewise.
(main): Likewise.
* process.c (internal_fork): Likewise.
(internal_exec): Likewise.
* strace.c (trace): Fix the bug where different options were set
depending on "tcp->parent == NULL" condition. Add a comment
which makes it more clear why this condition is checked.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/defs.h b/defs.h
index b2ca923..75b002d 100644
--- a/defs.h
+++ b/defs.h
@@ -508,8 +508,7 @@
extern struct tcb **tcbtab;
extern int *qual_flags;
extern int debug, followfork;
-extern unsigned int ptrace_setoptions_followfork;
-extern unsigned int ptrace_setoptions_for_all;
+extern unsigned int ptrace_setoptions;
extern int dtime, xflag, qflag;
extern cflag_t cflag;
extern int acolumn;