console: Report an error when output buffer is exhausted

If the console output buffer is exhausted, characters are silently dropped
from the end. Detect this condition and report an error when reading back
the characters.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 32 insertions, 5 deletions

diff --git a/test/ut.c b/test/ut.c
index ea0af15..a0fe5fa 100644
--- a/test/ut.c
+++ b/test/ut.c
@@ -51,14 +51,31 @@ long ut_check_delta(ulong last)
 	return ut_check_free() - last;
 }
 
+static int readline_check(struct unit_test_state *uts)
+{
+	int ret;
+
+	ret = console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	if (ret == -ENOSPC) {
+		ut_fail(uts, __FILE__, __LINE__, __func__,
+			"Console record buffer too small - increase CONFIG_CONSOLE_RECORD_OUT_SIZE");
+		return ret;
+	}
+
+	return 0;
+}
+
 int ut_check_console_line(struct unit_test_state *uts, const char *fmt, ...)
 {
 	va_list args;
+	int ret;
 
 	va_start(args, fmt);
 	vsnprintf(uts->expect_str, sizeof(uts->expect_str), fmt, args);
 	va_end(args);
-	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ret = readline_check(uts);
+	if (ret < 0)
+		return ret;
 
 	return strcmp(uts->expect_str, uts->actual_str);
 }
@@ -66,11 +83,14 @@ int ut_check_console_line(struct unit_test_state *uts, const char *fmt, ...)
 int ut_check_console_linen(struct unit_test_state *uts, const char *fmt, ...)
 {
 	va_list args;
+	int ret;
 
 	va_start(args, fmt);
 	vsnprintf(uts->expect_str, sizeof(uts->expect_str), fmt, args);
 	va_end(args);
-	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ret = readline_check(uts);
+	if (ret < 0)
+		return ret;
 
 	return strncmp(uts->expect_str, uts->actual_str,
 		       strlen(uts->expect_str));
@@ -78,19 +98,26 @@ int ut_check_console_linen(struct unit_test_state *uts, const char *fmt, ...)
 
 int ut_check_skipline(struct unit_test_state *uts)
 {
+	int ret;
+
 	if (!console_record_avail())
 		return -ENFILE;
-	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ret = readline_check(uts);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
 
 int ut_check_console_end(struct unit_test_state *uts)
 {
+	int ret;
+
 	if (!console_record_avail())
 		return 0;
-
-	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ret = readline_check(uts);
+	if (ret < 0)
+		return ret;
 
 	return 1;
 }