Add the IR attribute 'sspstrong'.
SSPStrong applies a heuristic to insert stack protectors in these situations:
* A Protector is required for functions which contain an array, regardless of
type or length.
* A Protector is required for functions which contain a structure/union which
contains an array, regardless of type or length. Note, there is no limit to
the depth of nesting.
* A protector is required when the address of a local variable (i.e., stack
based variable) is exposed. (E.g., such as through a local whose address is
taken as part of the RHS of an assignment or a local whose address is taken as
part of a function argument.)
This patch implements the SSPString attribute to be equivalent to
SSPRequired. This will change in a subsequent patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173230 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index 4bd2391..964a404 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -206,6 +206,8 @@
Result += "ssp ";
if (hasAttribute(Attribute::StackProtectReq))
Result += "sspreq ";
+ if (hasAttribute(Attribute::StackProtectStrong))
+ Result += "sspstrong ";
if (hasAttribute(Attribute::NoRedZone))
Result += "noredzone ";
if (hasAttribute(Attribute::NoImplicitFloat))
@@ -487,6 +489,7 @@
case Attribute::AddressSafety: return 1ULL << 32;
case Attribute::MinSize: return 1ULL << 33;
case Attribute::NoDuplicate: return 1ULL << 34;
+ case Attribute::StackProtectStrong: return 1ULL << 35;
}
llvm_unreachable("Unsupported attribute type");
}