diff mbox series

[RFC,bpf-next,v2,5/9] selftests/bpf: no need to track next_match_pos in struct test_loader

Message ID 20240704102402.1644916-6-eddyz87@gmail.com (mailing list archive)
State RFC
Delegated to: BPF
Headers show
Series no_caller_saved_registers attribute for helper calls | expand

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netdev/build_32bit success Errors and warnings before: 8 this patch: 8
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netdev/cc_maintainers warning 9 maintainers not CCed: song@kernel.org sdf@google.com mykolal@fb.com linux-kselftest@vger.kernel.org jolsa@kernel.org haoluo@google.com shuah@kernel.org kpsingh@kernel.org john.fastabend@gmail.com
netdev/build_clang success Errors and warnings before: 8 this patch: 8
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Commit Message

Eduard Zingerman July 4, 2024, 10:23 a.m. UTC 
The call stack for validate_case() function looks as follows:
- test_loader__run_subtests()
  - process_subtest()
    - run_subtest()
      - prepare_case(), which does 'tester->next_match_pos = 0';
      - validate_case(), which increments tester->next_match_pos.

Hence, each subtest is run with next_match_pos freshly set to zero.
Meaning that there is no need to persist this variable in the
struct test_loader, use local variable instead.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
---
 tools/testing/selftests/bpf/test_loader.c | 19 ++++++++-----------
 tools/testing/selftests/bpf/test_progs.h  |  1 -
 2 files changed, 8 insertions(+), 12 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/test_loader.c b/tools/testing/selftests/bpf/test_loader.c
index f14e10b0de96..47508cf66e89 100644
--- a/tools/testing/selftests/bpf/test_loader.c
+++ b/tools/testing/selftests/bpf/test_loader.c
@@ -434,7 +434,6 @@  static void prepare_case(struct test_loader *tester,
 	bpf_program__set_flags(prog, prog_flags | spec->prog_flags);
 
 	tester->log_buf[0] = '\0';
-	tester->next_match_pos = 0;
 }
 
 static void emit_verifier_log(const char *log_buf, bool force)
@@ -450,25 +449,23 @@  static void validate_case(struct test_loader *tester,
 			  struct bpf_program *prog,
 			  int load_err)
 {
-	int i, j, err;
-	char *match;
 	regmatch_t reg_match[1];
+	const char *log = tester->log_buf;
+	int i, j, err;
 
 	for (i = 0; i < subspec->expect_msg_cnt; i++) {
 		struct expect_msg *msg = &subspec->expect_msgs[i];
+		const char *match = NULL;
 
 		if (msg->substr) {
-			match = strstr(tester->log_buf + tester->next_match_pos, msg->substr);
+			match = strstr(log, msg->substr);
 			if (match)
-				tester->next_match_pos = match - tester->log_buf + strlen(msg->substr);
+				log += strlen(msg->substr);
 		} else {
-			err = regexec(&msg->regex,
-				      tester->log_buf + tester->next_match_pos, 1, reg_match, 0);
+			err = regexec(&msg->regex, log, 1, reg_match, 0);
 			if (err == 0) {
-				match = tester->log_buf + tester->next_match_pos + reg_match[0].rm_so;
-				tester->next_match_pos += reg_match[0].rm_eo;
-			} else {
-				match = NULL;
+				match = log + reg_match[0].rm_so;
+				log += reg_match[0].rm_eo;
 			}
 		}
 
diff --git a/tools/testing/selftests/bpf/test_progs.h b/tools/testing/selftests/bpf/test_progs.h
index 0ba5a20b19ba..8e997de596db 100644
--- a/tools/testing/selftests/bpf/test_progs.h
+++ b/tools/testing/selftests/bpf/test_progs.h
@@ -438,7 +438,6 @@  typedef int (*pre_execution_cb)(struct bpf_object *obj);
 struct test_loader {
 	char *log_buf;
 	size_t log_buf_sz;
-	size_t next_match_pos;
 	pre_execution_cb pre_execution_cb;
 
 	struct bpf_object *obj;