From: Ben Pfaff <blp@cs.stanford.edu>
Date: Thu, 2 Dec 2004 00:18:10 +0000 (+0000)
Subject: Add recommendation.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38ed1a70398c30acf376a3e6f5f79e58f009a17c;p=pintos-anon

Add recommendation.
---

diff --git a/doc/doc.texi b/doc/doc.texi
index b2b3b5c..a2b8b7a 100644
--- a/doc/doc.texi
+++ b/doc/doc.texi
@@ -112,6 +112,21 @@ should be in @file{pintos/src/threads/testcases}.
 
 @item
 Think about what may actually crash your code.
+
+@item
+Think about what the compiler might do to your code.  Suppose you write
+the following to test your virtual memory implementation's ability to
+expand the stack:
+@example
+int main (void) {
+  int array[4096];
+  array[123] = 234;
+  return 0;
+}
+@end example
+@noindent The compiler is quite likely to notice that the value that you
+write to the array is never used again and thereby decide not to write
+it at all.  The result is that your test does not test anything at all.
 @end itemize
 
 Your @file{TESTCASE} file is also where you can show us the