gcc-wwwdocs branch master updated. 05c170a452a9aecf36a719515a7e64f7999305e4

[Matthew Malcomson <matmal01@sourceware.org>]

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commit 05c170a452a9aecf36a719515a7e64f7999305e4
Author: Matthew Malcomson <matthew.malcomson@arm.com>
Date:   Tue Dec 22 13:24:15 2020 +0000

    wwwdocs: Document new Hardware-assisted AddressSanitizer
    
    gcc-11/changes: Document new Hardware-assisted AddressSanitizer.

diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html
index 1a9e72c1..d04b377d 100644
--- a/htdocs/gcc-11/changes.html
+++ b/htdocs/gcc-11/changes.html
@@ -116,6 +116,25 @@ a work-in-progress.</p>
       option (which defaults to 8 spaces per tab stop).
     </p>
   </li>
+  <li>
+    <p>
+    Introduce <a href="https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html">
+      Hardware-assisted AddressSanitizer</a> support.  This sanitizer currently
+    only works for the AArch64 target.  It helps debug address problems
+    similarly to
+    <a href="https://github.com/google/sanitizers/wiki/AddressSanitizer">
+      AddressSanitizer</a> but is based on partial hardware assistance and
+    provides probabilistic protection to use less RAM at run time.
+    <a href="https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html">
+      Hardware-assisted AddressSanitizer</a> is not production-ready for user
+    space, and is provided mainly for use compiling the Linux Kernel.
+    </p>
+    To use this sanitizer the command line arguments are:
+    <ul>
+      <li><code>-fsanitize=hwaddress</code> to instrument userspace code.</li>
+      <li><code>-fsanitize=kernel-hwaddress</code> to instrument kernel code.</li>
+    </ul>
+  </li>
 </ul>
 
 <!-- .................................................................. -->

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Summary of changes:
 htdocs/gcc-11/changes.html | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)


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