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[stackprotector] Add command line option -fstack-protector-strong

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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
This commit is contained in:
Josh Magee
2014-02-11 01:35:14 +00:00
parent a47009dbd3
commit e0fc1a80cb
9 changed files with 36 additions and 10 deletions
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4
clang/lib/Frontend/InitPreprocessor.cpp
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@@ -695,8 +695,10 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
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)))");