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From: Andreas Schwab <>
Subject: [PATCH] Document M_PERTURB
Date: Mon, 26 Jul 2010 14:37:00 -0000	[thread overview]
Message-ID: <m3zkxez4ue.fsf@hase.home> (raw)

2010-07-26  Andreas Schwab  <>

	* manual/memory.texi (Malloc Tunable Parameters): Document

diff --git a/manual/memory.texi b/manual/memory.texi
index 59ea1ee..6ae408d 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -702,6 +702,11 @@ be allocated via @code{mmap}.
 @item M_MMAP_MAX
 The maximum number of chunks to allocate with @code{mmap}.  Setting this
 to zero disables all use of @code{mmap}.
+@item M_PERTURB
+If non-zero, memory blocks are filled with a value depending on
+this parameter when they are allocated (except when allocated by
+@code{calloc}) and freed.  This can be used to debug the use of
+uninitialized or freed heap memory.
 @end table
 @end deftypefun

Andreas Schwab,
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84  5EC7 45C6 250E 6F00 984E
"And now for something completely different."

             reply	other threads:[~2010-07-26 14:37 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-26 14:37 Andreas Schwab [this message]
2010-07-26 20:01 ` Roland McGrath
2010-07-26 20:17   ` Jakub Jelinek
2010-07-27  9:13   ` Andreas Schwab
2010-07-27  9:32     ` Roland McGrath

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