bugfix in debug system and more instrumentation to find an issue

bugfix: debug string larger than 1K were improperly displayed. Max size
is now 32K, and if a string is even longer it is meaningful truncated.

1 files changed, 11 insertions, 1 deletions

diff --git a/runtime/debug.c b/runtime/debug.c
index fb751efb..7c938008 100644
--- a/runtime/debug.c
+++ b/runtime/debug.c
@@ -960,7 +960,7 @@ void
 dbgprintf(char *fmt, ...)
 {
 	va_list ap;
-	char pszWriteBuf[1024];
+	char pszWriteBuf[32*1024];
 	size_t lenWriteBuf;
 
 	if(!(Debug && debugging_on))
@@ -969,6 +969,16 @@ dbgprintf(char *fmt, ...)
 	va_start(ap, fmt);
 	lenWriteBuf = vsnprintf(pszWriteBuf, sizeof(pszWriteBuf), fmt, ap);
 	va_end(ap);
+
+	if(lenWriteBuf >= sizeof(pszWriteBuf)) {
+		/* if we need to truncate, do it in a somewhat useful way... */
+  		pszWriteBuf[sizeof(pszWriteBuf) - 5] = '!';
+  		pszWriteBuf[sizeof(pszWriteBuf) - 4] = '.';
+  		pszWriteBuf[sizeof(pszWriteBuf) - 3] = '.';
+  		pszWriteBuf[sizeof(pszWriteBuf) - 2] = '.';
+  		pszWriteBuf[sizeof(pszWriteBuf) - 1] = '\n';
+		lenWriteBuf = sizeof(pszWriteBuf);
+	}
 	dbgprint(NULL, pszWriteBuf, lenWriteBuf);
 }