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[ubsan-minimal] Document the new runtime 

Differential Revision: https://reviews.llvm.org/D37647

llvm-svn: 312957
This commit is contained in:
Vedant Kumar 2017-09-11 21:37:05 +00:00
parent 0d17638b89
commit 90c80a3283
2 changed files with 17 additions and 1 deletions
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5
clang/docs/ReleaseNotes.rst
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@ -229,7 +229,10 @@ Static Analyzer
Undefined Behavior Sanitizer (UBSan)
------------------------------------
...
* A minimal runtime is now available. It is suitable for use in production
environments, and has a small attack surface. It only provides very basic
issue logging and deduplication, and does not support ``-fsanitize=vptr``
checking.
Core Analysis Improvements
==========================

13
clang/docs/UndefinedBehaviorSanitizer.rst
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@ -155,6 +155,19 @@ Volatile
The ``null``, ``alignment``, ``object-size``, and ``vptr`` checks do not apply
to pointers to types with the ``volatile`` qualifier.
Minimal Runtime
===============
There is a minimal UBSan runtime available suitable for use in production
environments. This runtime has a small attack surface. It only provides very
basic issue logging and deduplication, and does not support ``-fsanitize=vptr``
checking.
To use the minimal runtime, add ``-fsanitize-minimal-runtime`` to the clang
command line options. For example, if you're used to compiling with
``-fsanitize=undefined``, you could enable the minimal runtime with
``-fsanitize=undefined -fsanitize-minimal-runtime``.
Stack traces and report symbolization
=====================================
If you want UBSan to print symbolized stack trace for each error report, you