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[bpf-next,v1,7/8] selftests/bpf: Fix using stdout, stderr as struct field names

Message ID 847a5b798f24e81b9dec4e8d9eb3eb1e602a909e.1721903630.git.tony.ambardar@gmail.com
State Superseded
Headers show
Series selftests/bpf: Improve libc portability / musl support (part 2) | expand

Commit Message

Tony Ambardar July 25, 2024, 10:35 a.m. UTC 
From: Tony Ambardar <tony.ambardar@gmail.com>

Typically stdin, stdout, stderr are treated as reserved identifiers under
ISO/ANSI C, and a libc implementation is free to define these as macros.
This is the case in musl libc and results in compile errors when these
names are reused as struct fields, as with 'struct test_env' and related
usage in test_progs.[ch] and reg_bounds.c.

Rename the fields to _stdout and _stderr to avoid many errors seen building
against musl, e.g.:

  In file included from test_progs.h:6,
                   from test_progs.c:5:
  test_progs.c: In function 'print_test_result':
  test_progs.c:237:21: error: expected identifier before '(' token
    237 |         fprintf(env.stdout, "#%-*d %s:", TEST_NUM_WIDTH, test->test_num, test->test_name);
        |                     ^~~~~~
  test_progs.c:237:9: error: too few arguments to function 'fprintf'
    237 |         fprintf(env.stdout, "#%-*d %s:", TEST_NUM_WIDTH, test->test_num, test->test_name);
        |         ^~~~~~~

Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
---
 .../selftests/bpf/prog_tests/reg_bounds.c     |  2 +-
 tools/testing/selftests/bpf/test_progs.c      | 66 +++++++++----------
 tools/testing/selftests/bpf/test_progs.h      |  8 +--
 3 files changed, 38 insertions(+), 38 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/reg_bounds.c b/tools/testing/selftests/bpf/prog_tests/reg_bounds.c
index 0da4225749bd..ff4ebc9eaf3f 100644
--- a/tools/testing/selftests/bpf/prog_tests/reg_bounds.c
+++ b/tools/testing/selftests/bpf/prog_tests/reg_bounds.c
@@ -1487,7 +1487,7 @@  static int verify_case_opt(struct ctx *ctx, enum num_t init_t, enum num_t cond_t
 			u64 elapsed_ns = get_time_ns() - ctx->start_ns;
 			double remain_ns = elapsed_ns / progress * (1 - progress);
 
-			fprintf(env.stderr, "PROGRESS (%s): %d/%d (%.2lf%%), "
+			fprintf(env._stderr, "PROGRESS (%s): %d/%d (%.2lf%%), "
 					    "elapsed %llu mins (%.2lf hrs), "
 					    "ETA %.0lf mins (%.2lf hrs)\n",
 				ctx->progress_ctx,
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index f6cfc6a8e8f0..091b49bf671a 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -44,15 +44,15 @@  static void stdio_hijack_init(char **log_buf, size_t *log_cnt)
 
 	stdout = open_memstream(log_buf, log_cnt);
 	if (!stdout) {
-		stdout = env.stdout;
+		stdout = env._stdout;
 		perror("open_memstream");
 		return;
 	}
 
 	if (env.subtest_state)
-		env.subtest_state->stdout = stdout;
+		env.subtest_state->_stdout = stdout;
 	else
-		env.test_state->stdout = stdout;
+		env.test_state->_stdout = stdout;
 
 	stderr = stdout;
 #endif
@@ -66,8 +66,8 @@  static void stdio_hijack(char **log_buf, size_t *log_cnt)
 		return;
 	}
 
-	env.stdout = stdout;
-	env.stderr = stderr;
+	env._stdout = stdout;
+	env._stderr = stderr;
 
 	stdio_hijack_init(log_buf, log_cnt);
 #endif
@@ -84,13 +84,13 @@  static void stdio_restore_cleanup(void)
 	fflush(stdout);
 
 	if (env.subtest_state) {
-		fclose(env.subtest_state->stdout);
-		env.subtest_state->stdout = NULL;
-		stdout = env.test_state->stdout;
-		stderr = env.test_state->stdout;
+		fclose(env.subtest_state->_stdout);
+		env.subtest_state->_stdout = NULL;
+		stdout = env.test_state->_stdout;
+		stderr = env.test_state->_stdout;
 	} else {
-		fclose(env.test_state->stdout);
-		env.test_state->stdout = NULL;
+		fclose(env.test_state->_stdout);
+		env.test_state->_stdout = NULL;
 	}
 #endif
 }
@@ -103,13 +103,13 @@  static void stdio_restore(void)
 		return;
 	}
 
-	if (stdout == env.stdout)
+	if (stdout == env._stdout)
 		return;
 
 	stdio_restore_cleanup();
 
-	stdout = env.stdout;
-	stderr = env.stderr;
+	stdout = env._stdout;
+	stderr = env._stderr;
 #endif
 }
 
@@ -237,25 +237,25 @@  static void print_test_result(const struct prog_test_def *test, const struct tes
 	int skipped_cnt = test_state->skip_cnt;
 	int subtests_cnt = test_state->subtest_num;
 
-	fprintf(env.stdout, "#%-*d %s:", TEST_NUM_WIDTH, test->test_num, test->test_name);
+	fprintf(env._stdout, "#%-*d %s:", TEST_NUM_WIDTH, test->test_num, test->test_name);
 	if (test_state->error_cnt)
-		fprintf(env.stdout, "FAIL");
+		fprintf(env._stdout, "FAIL");
 	else if (!skipped_cnt)
-		fprintf(env.stdout, "OK");
+		fprintf(env._stdout, "OK");
 	else if (skipped_cnt == subtests_cnt || !subtests_cnt)
-		fprintf(env.stdout, "SKIP");
+		fprintf(env._stdout, "SKIP");
 	else
-		fprintf(env.stdout, "OK (SKIP: %d/%d)", skipped_cnt, subtests_cnt);
+		fprintf(env._stdout, "OK (SKIP: %d/%d)", skipped_cnt, subtests_cnt);
 
-	fprintf(env.stdout, "\n");
+	fprintf(env._stdout, "\n");
 }
 
 static void print_test_log(char *log_buf, size_t log_cnt)
 {
 	log_buf[log_cnt] = '\0';
-	fprintf(env.stdout, "%s", log_buf);
+	fprintf(env._stdout, "%s", log_buf);
 	if (log_buf[log_cnt - 1] != '\n')
-		fprintf(env.stdout, "\n");
+		fprintf(env._stdout, "\n");
 }
 
 static void print_subtest_name(int test_num, int subtest_num,
@@ -266,14 +266,14 @@  static void print_subtest_name(int test_num, int subtest_num,
 
 	snprintf(test_num_str, sizeof(test_num_str), "%d/%d", test_num, subtest_num);
 
-	fprintf(env.stdout, "#%-*s %s/%s",
+	fprintf(env._stdout, "#%-*s %s/%s",
 		TEST_NUM_WIDTH, test_num_str,
 		test_name, subtest_name);
 
 	if (result)
-		fprintf(env.stdout, ":%s", result);
+		fprintf(env._stdout, ":%s", result);
 
-	fprintf(env.stdout, "\n");
+	fprintf(env._stdout, "\n");
 }
 
 static void jsonw_write_log_message(json_writer_t *w, char *log_buf, size_t log_cnt)
@@ -458,7 +458,7 @@  bool test__start_subtest(const char *subtest_name)
 	memset(subtest_state, 0, sub_state_size);
 
 	if (!subtest_name || !subtest_name[0]) {
-		fprintf(env.stderr,
+		fprintf(env._stderr,
 			"Subtest #%d didn't provide sub-test name!\n",
 			state->subtest_num);
 		return false;
@@ -466,7 +466,7 @@  bool test__start_subtest(const char *subtest_name)
 
 	subtest_state->name = strdup(subtest_name);
 	if (!subtest_state->name) {
-		fprintf(env.stderr,
+		fprintf(env._stderr,
 			"Subtest #%d: failed to copy subtest name!\n",
 			state->subtest_num);
 		return false;
@@ -1036,7 +1036,7 @@  void crash_handler(int signum)
 
 	sz = backtrace(bt, ARRAY_SIZE(bt));
 
-	if (env.stdout)
+	if (env._stdout)
 		stdio_restore();
 	if (env.test) {
 		env.test_state->error_cnt++;
@@ -1352,7 +1352,7 @@  static void calculate_summary_and_print_errors(struct test_env *env)
 	if (env->json) {
 		w = jsonw_new(env->json);
 		if (!w)
-			fprintf(env->stderr, "Failed to create new JSON stream.");
+			fprintf(env->_stderr, "Failed to create new JSON stream.");
 	}
 
 	if (w) {
@@ -1701,8 +1701,8 @@  int main(int argc, char **argv)
 		return -1;
 	}
 
-	env.stdout = stdout;
-	env.stderr = stderr;
+	env._stdout = stdout;
+	env._stderr = stderr;
 
 	env.has_testmod = true;
 	if (!env.list_test_names) {
@@ -1710,7 +1710,7 @@  int main(int argc, char **argv)
 		unload_bpf_testmod(verbose());
 
 		if (load_bpf_testmod(verbose())) {
-			fprintf(env.stderr, "WARNING! Selftests relying on bpf_testmod.ko will be skipped.\n");
+			fprintf(env._stderr, "WARNING! Selftests relying on bpf_testmod.ko will be skipped.\n");
 			env.has_testmod = false;
 		}
 	}
@@ -1788,7 +1788,7 @@  int main(int argc, char **argv)
 		}
 
 		if (env.list_test_names) {
-			fprintf(env.stdout, "%s\n", test->test_name);
+			fprintf(env._stdout, "%s\n", test->test_name);
 			env.succ_cnt++;
 			continue;
 		}
diff --git a/tools/testing/selftests/bpf/test_progs.h b/tools/testing/selftests/bpf/test_progs.h
index b1e949fb16cf..f42f1ae59c6e 100644
--- a/tools/testing/selftests/bpf/test_progs.h
+++ b/tools/testing/selftests/bpf/test_progs.h
@@ -75,7 +75,7 @@  struct subtest_state {
 	bool skipped;
 	bool filtered;
 
-	FILE *stdout;
+	FILE *_stdout;
 };
 
 struct test_state {
@@ -92,7 +92,7 @@  struct test_state {
 	size_t log_cnt;
 	char *log_buf;
 
-	FILE *stdout;
+	FILE *_stdout;
 };
 
 struct test_env {
@@ -111,8 +111,8 @@  struct test_env {
 	struct test_state *test_state; /* current running test state */
 	struct subtest_state *subtest_state; /* current running subtest state */
 
-	FILE *stdout;
-	FILE *stderr;
+	FILE *_stdout;
+	FILE *_stderr;
 	int nr_cpus;
 	FILE *json;