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authorPeter Collingbourne <peter@pcc.me.uk>2013-07-09 22:03:17 +0000
committerPeter Collingbourne <peter@pcc.me.uk>2013-07-09 22:03:17 +0000
commit49062a97cf8b94aed9ffe8f54605719a3c51f63c (patch)
treecc0b25b946dc984ff43c7e49b14bd0f5039bcea2 /clang/lib/CodeGen/CodeGenModule.h
parentfea30e56d8b1036900e66f6c45018d427a51ec32 (diff)
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Implement categories for special case lists.
A special case list can now specify categories for specific globals, which can be used to instruct an instrumentation pass to treat certain functions or global variables in a specific way, such as by omitting certain aspects of instrumentation while keeping others, or informing the instrumentation pass that a specific uninstrumentable function has certain semantics, thus allowing the pass to instrument callers according to those semantics. For example, AddressSanitizer now uses the "init" category instead of global-init prefixes for globals whose initializers should not be instrumented, but which in all other respects should be instrumented. The motivating use case is DataFlowSanitizer, which will have a number of different categories for uninstrumentable functions, such as "functional" which specifies that a function has pure functional semantics, or "discard" which indicates that a function's return value should not be labelled. Differential Revision: http://llvm-reviews.chandlerc.com/D1092 llvm-svn: 185978
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