svn commit: trunk/uClibc/test/stdio

vapier at uclibc.org vapier at uclibc.org
Mon Feb 5 01:17:10 UTC 2007


Author: vapier
Date: 2007-02-04 17:17:09 -0800 (Sun, 04 Feb 2007)
New Revision: 17775

Log:
new cheesy test by Denis Vlasenko to trigger fclose loop

Added:
   trunk/uClibc/test/stdio/fclose-loop.c

Modified:
   trunk/uClibc/test/stdio/


Changeset:

Property changes on: trunk/uClibc/test/stdio
___________________________________________________________________
Name: svn:ignore
   - 64bit
*_glibc
*.gdb
*.out

   + 64bit
fclose-loop
*_glibc
*.gdb
*.out


Added: trunk/uClibc/test/stdio/fclose-loop.c
===================================================================
--- trunk/uClibc/test/stdio/fclose-loop.c	                        (rev 0)
+++ trunk/uClibc/test/stdio/fclose-loop.c	2007-02-05 01:17:09 UTC (rev 17775)
@@ -0,0 +1,21 @@
+/* From: Denis Vlasenko <vda.linux at googlemail.com>
+ *	With certain combination of .config options fclose() does not
+ *	remove FILE* pointer from _stdio_openlist.  As a result, subsequent
+ *	fopen() may allocate new FILE structure exactly in place of one
+ *	freed by previous fclose(), which then makes _stdio_openlist
+ *	circularlt looped. The following program will enter infinite loop
+ *	trying to walk _stdio_openlist in exit():
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	FILE* fp;
+	fp = fopen("/dev/null", "r");
+	fclose(fp);
+	fp = fopen("/dev/zero", "r");
+	fclose(fp);
+	return 0;
+}




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