selftests/bpf: Add a test for objects stuck in free_by_rcu_ttracegrafted

Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/profile2linkerlist.pl b/scripts/profile2linkerlist.pl
new file mode 100755
index 000000000..316e71918
--- /dev/null
+++ b/scripts/profile2linkerlist.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+
+#
+# Takes a (sorted) output of readprofile and turns it into a list suitable for
+# linker scripts
+#
+# usage:
+#	 readprofile | sort -rn | perl profile2linkerlist.pl > functionlist
+#
+use strict;
+
+while (<>) {
+  my $line = $_;
+
+  $_ =~ /\W*[0-9]+\W*([a-zA-Z\_0-9]+)\W*[0-9]+/;
+
+  print "*(.text.$1)\n"
+      unless ($line =~ /unknown/) || ($line =~ /total/);
+}