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Add the IR attribute 'sspstrong'.

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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
This commit is contained in:
Bill Wendling
2013-01-23 06:41:41 +00:00
parent 28d65722d6
commit 114baee1fa
14 changed files with 856 additions and 44 deletions
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5
include/llvm-c/Core.h
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@ -173,10 +173,11 @@ typedef enum {
LLVMUWTable = 1 << 30,
LLVMNonLazyBind = 1 << 31
/* FIXME: This attribute is currently not included in the C API as
/* FIXME: These attributes are currently not included in the C API as
a temporary measure until the API/ABI impact to the C API is understood
and the path forward agreed upon.
LLVMAddressSafety = 1ULL << 32
LLVMAddressSafety = 1ULL << 32,
LLVMStackProtectStrongAttribute = 1ULL<<33
*/
} LLVMAttribute;