[stackprotector] Add command line option -fstack-protector-strong
This option has the following effects:
* It adds the sspstrong IR attribute to each function within the CU.
* It defines the macro __SSP_STRONG__ with the value of 2.
Differential Revision: http://llvm-reviews.chandlerc.com/D2717
llvm-svn: 201120
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 7b3166d..f975c9f 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -695,8 +695,10 @@
if (LangOpts.getStackProtector() == LangOptions::SSPOn)
Builder.defineMacro("__SSP__");
+ else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
+ Builder.defineMacro("__SSP_STRONG__", "2");
else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
- Builder.defineMacro("__SSP_ALL__", "2");
+ Builder.defineMacro("__SSP_ALL__", "3");
if (FEOpts.ProgramAction == frontend::RewriteObjC)
Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");