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Diffstat (limited to 'clang/docs/UsersManual.rst')
| -rw-r--r-- | clang/docs/UsersManual.rst | 29 |
1 files changed, 2 insertions, 27 deletions
diff --git a/clang/docs/UsersManual.rst b/clang/docs/UsersManual.rst index 1f824962b18..c103ef6c5b4 100644 --- a/clang/docs/UsersManual.rst +++ b/clang/docs/UsersManual.rst @@ -958,8 +958,8 @@ are listed below. - .. _opt_fsanitize_memory: ``-fsanitize=memory``: :doc:`MemorySanitizer`, - an *experimental* detector of uninitialized reads. Not ready for - widespread use. + a detector of uninitialized reads. Requires instrumentation of all + program code. - .. _opt_fsanitize_undefined: ``-fsanitize=undefined``: :doc:`UndefinedBehaviorSanitizer`, @@ -986,31 +986,6 @@ are listed below. - ``-fno-sanitize-blacklist``: don't use blacklist file, if it was specified earlier in the command line. - Extra features of MemorySanitizer (require explicit - ``-fsanitize=memory``): - - - ``-fsanitize-memory-track-origins[=level]``: Enables origin tracking in - MemorySanitizer. Adds a second section to MemorySanitizer - reports pointing to the heap or stack allocation the - uninitialized bits came from. Slows down execution by additional - 1.5x-2x. - - Possible values for level are 0 (off), 1, 2 (default). Level 2 - adds more sections to MemorySanitizer reports describing the - 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 ``-fsanitize=vptr`` (or a group that includes it, such as |
