This flag causes the compiler to emit bit set entries for functions as well
as runtime bitset checks at indirect call sites. Depends on the new function
bitset mechanism.

Differential Revision: http://reviews.llvm.org/D11857

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247238 91177308-0d34-0410-b5e6-96231b3b80d8

We now use the sanitizer special case list to decide which types to blacklist.
We also support a special blacklist entry for types with a uuid attribute,
which are generally COM types whose virtual tables are defined externally.

Differential Revision: http://reviews.llvm.org/D11096

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@242286 91177308-0d34-0410-b5e6-96231b3b80d8

Summary:
This is unfortunate, but would let us land http://reviews.llvm.org/D10467,
that makes ToolChains responsible for computing the set of sanitizers
they support.

Unfortunately, Darwin ToolChains doesn't know about actual OS they
target until ToolChain::TranslateArgs() is called. In particular, it
means we won't be able to construct SanitizerArgs for these ToolChains
before that.

This change removes SanitizerArgs::needsLTO() method, so that now
ToolChain::IsUsingLTO(), which is called very early, doesn't need
SanitizerArgs to implement this method.

Docs and test cases are updated accordingly. See
https://llvm.org/bugs/show_bug.cgi?id=23539, which describes why we
start all these.

Test Plan: regression test suite

Reviewers: pcc

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D10560

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@240170 91177308-0d34-0410-b5e6-96231b3b80d8

This uses the same class metadata currently used for virtual call and
cast checks.

The new flag is -fsanitize=cfi-nvcall. For consistency, the -fsanitize=cfi-vptr
flag has been renamed -fsanitize=cfi-vcall.

Differential Revision: http://reviews.llvm.org/D8756

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@233874 91177308-0d34-0410-b5e6-96231b3b80d8

This scheme checks that pointer and lvalue casts are made to an object of
the correct dynamic type; that is, the dynamic type of the object must be
a derived class of the pointee type of the cast. The checks are currently
only introduced where the class being casted to is a polymorphic class.

Differential Revision: http://reviews.llvm.org/D8312

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232241 91177308-0d34-0410-b5e6-96231b3b80d8

This patch introduces the -fsanitize=cfi-vptr flag, which enables a control
flow integrity scheme that checks that virtual calls take place using a vptr of
the correct dynamic type. More details in the new docs/ControlFlowIntegrity.rst
file.

It also introduces the -fsanitize=cfi flag, which is currently a synonym for
-fsanitize=cfi-vptr, but will eventually cover all CFI checks implemented
in Clang.

Differential Revision: http://reviews.llvm.org/D7424

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@230055 91177308-0d34-0410-b5e6-96231b3b80d8