strace patch to only trace threads with -f.
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Authored by werner on Jun 6 2019, 5:07 PM.

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	--- strace.c.orig 2019-06-06 17:04:21.271016482 +0200
	+++ strace.c 2019-06-06 17:04:32.371221549 +0200
	@@ -1795,9 +1795,9 @@
	}

	if (followfork)
	- ptrace_setoptions \|= PTRACE_O_TRACECLONE \|
	- PTRACE_O_TRACEFORK \|
	- PTRACE_O_TRACEVFORK;
	+ ptrace_setoptions \|= PTRACE_O_TRACECLONE;
	+
	+
	debug_msg("ptrace_setoptions = %#x", ptrace_setoptions);
	test_ptrace_seize();

If it is that simple I really do not understand why this is not upstream. o.O

It might have unwanted side-effects - I am not sure. Anyway for me it works.

strace patch to only trace threads with -f.ActivePublicActions