selftests/bpf: check insn processed in test_verifier

Teach test_verifier to parse verifier output for insn processed
and compare with expected number.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Edward Cree <ecree@solarflare.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

tools/testing/selftests/bpf/test_verifier.c

@@ -76,7 +76,7 @@ struct bpf_test {
 	int fixup_percpu_cgroup_storage[MAX_FIXUPS];
 	const char *errstr;
 	const char *errstr_unpriv;
-	uint32_t retval, retval_unpriv;
+	uint32_t retval, retval_unpriv, insn_processed;
 	enum {
 		UNDEF,
 		ACCEPT,
@@ -14444,6 +14444,19 @@ static void do_test_single(struct bpf_test *test, bool unpriv,
 		}
 	}
 
+	if (test->insn_processed) {
+		uint32_t insn_processed;
+		char *proc;
+
+		proc = strstr(bpf_vlog, "processed ");
+		insn_processed = atoi(proc + 10);
+		if (test->insn_processed != insn_processed) {
+			printf("FAIL\nUnexpected insn_processed %u vs %u\n",
+			       insn_processed, test->insn_processed);
+			goto fail_log;
+		}
+	}
+
 	if (fd_prog >= 0) {
 		__u8 tmp[TEST_DATA_LEN << 2];
 		__u32 size_tmp = sizeof(tmp);