[PATCH] D124058: [msan] Update Use-after-destruction documentation
Vitaly Buka via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Apr 19 18:42:46 PDT 2022
vitalybuka created this revision.
Herald added a project: All.
vitalybuka requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D124058
Files:
clang/docs/MemorySanitizer.rst
Index: clang/docs/MemorySanitizer.rst
===================================================================
--- clang/docs/MemorySanitizer.rst
+++ clang/docs/MemorySanitizer.rst
@@ -162,17 +162,16 @@
Use-after-destruction detection
===============================
-You can enable experimental use-after-destruction detection in MemorySanitizer.
-After invocation of the destructor, the object will be considered no longer
-readable, and using underlying memory will lead to error reports in runtime.
-Refer to the standard for `lifetime <https://eel.is/c++draft/basic.life#1>`_ definition.
+MemorySanitizer includes use-after-destruction detection. After invocation of
+the destructor, the object will be considered no longer readable, and using
+underlying memory will lead to error reports in runtime. Refer to the standard
+for `lifetime <https://eel.is/c++draft/basic.life#1>`_ definition.
-This feature is still experimental, in order to enable it at runtime you need
-to:
+This feature can be disabled with either:
-#. Pass addition Clang option ``-fsanitize-memory-use-after-dtor`` during
+#. Pass addition Clang option ``-fno-sanitize-memory-use-after-dtor`` during
compilation.
-#. Set environment variable `MSAN_OPTIONS=poison_in_dtor=1` before running
+#. Set environment variable `MSAN_OPTIONS=poison_in_dtor=0` before running
the program.
Handling external code
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