[ubsan-minimal] Document the new runtime
Differential Revision: https://reviews.llvm.org/D37647 llvm-svn: 312957
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@ -229,7 +229,10 @@ Static Analyzer
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Undefined Behavior Sanitizer (UBSan)
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------------------------------------
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...
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* A minimal runtime is now available. It is suitable for use in production
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environments, and has a small attack surface. It only provides very basic
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issue logging and deduplication, and does not support ``-fsanitize=vptr``
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checking.
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Core Analysis Improvements
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==========================
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@ -155,6 +155,19 @@ Volatile
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The ``null``, ``alignment``, ``object-size``, and ``vptr`` checks do not apply
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to pointers to types with the ``volatile`` qualifier.
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Minimal Runtime
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===============
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There is a minimal UBSan runtime available suitable for use in production
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environments. This runtime has a small attack surface. It only provides very
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basic issue logging and deduplication, and does not support ``-fsanitize=vptr``
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checking.
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To use the minimal runtime, add ``-fsanitize-minimal-runtime`` to the clang
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command line options. For example, if you're used to compiling with
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``-fsanitize=undefined``, you could enable the minimal runtime with
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``-fsanitize=undefined -fsanitize-minimal-runtime``.
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Stack traces and report symbolization
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=====================================
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If you want UBSan to print symbolized stack trace for each error report, you
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