Author: nmusgrave Date: Wed Sep 16 19:10:59 2015 New Revision: 247871 URL: http://llvm.org/viewvc/llvm-project?rev=247871&view=rev Log: Updating docs for MSan to describe poison-in-dtor.
Summary: Describe the compile and runtime flags to enable MemorySanitizer detection of use-after-destroy. Reviewers: eugenis Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D12914 Revise doc description of use-after-dtor. Change wording to specify memory no longer readable. Modified: cfe/trunk/docs/UsersManual.rst Modified: cfe/trunk/docs/UsersManual.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=247871&r1=247870&r2=247871&view=diff ============================================================================== --- cfe/trunk/docs/UsersManual.rst (original) +++ cfe/trunk/docs/UsersManual.rst Wed Sep 16 19:10:59 2015 @@ -1065,6 +1065,16 @@ are listed below. order of memory stores the uninitialized value went through. This mode may use extra memory in programs that copy uninitialized memory a lot. + - ``-fsanitize-memory-use-after-dtor``: Enables use-after-destruction + detection in MemorySanitizer. After invocation of the destructor, + the object is considered no longer readable. Facilitates the + detection of use-after-destroy bugs. + + Setting the MSAN_OPTIONS=poison_in_dtor=1 enables the poisoning of + memory at runtime. Any subsequent access to the destroyed object + fails at runtime. This feature is still experimental, but this + environment variable must be set to 1 in order for the above flag + to have any effect. The ``-fsanitize=`` argument must also be provided when linking, in order to link to the appropriate runtime library. When using _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
