Add stack protector support to clang. This generates the 'ssp' and 'sspreq'

function attributes. There are predefined macros that are defined when stack
protectors are used: __SSP__=1 with -fstack-protector and __SSP_ALL__=2 with
-fstack-protector-all.

llvm-svn: 74405

3 files changed, 10 insertions, 3 deletions

diff --git a/clang/include/clang/Basic/LangOptions.h b/clang/include/clang/Basic/LangOptions.h
index 543a0fff8e7..9b308e1b322 100644
--- a/clang/include/clang/Basic/LangOptions.h
+++ b/clang/include/clang/Basic/LangOptions.h
@@ -84,6 +84,10 @@ public:
 
   unsigned OpenCL            : 1; // OpenCL C99 language extensions.
 
+  unsigned StackProtector    : 2; // Whether stack protectors are on:
+                                  //   0 - None
+                                  //   1 - On
+                                  //   2 - All
 
 private:
   unsigned GC : 2; // Objective-C Garbage Collection modes.  We declare
@@ -116,7 +120,7 @@ public:
     Exceptions = NeXTRuntime = Freestanding = NoBuiltin = 0;
     LaxVectorConversions = 1;
     HeinousExtensions = 0;
-    AltiVec = OpenCL = 0;
+    AltiVec = OpenCL = StackProtector = 0;
     
     SymbolVisibility = (unsigned) Default;
     
diff --git a/clang/include/clang/Driver/ArgList.h b/clang/include/clang/Driver/ArgList.h
index 84e0329a375..a9c890b0b89 100644
--- a/clang/include/clang/Driver/ArgList.h
+++ b/clang/include/clang/Driver/ArgList.h
@@ -83,6 +83,8 @@ namespace driver {
     /// \arg Claim Whether the argument should be claimed, if it exists.
     Arg *getLastArg(options::ID Id, bool Claim=true) const;
     Arg *getLastArg(options::ID Id0, options::ID Id1, bool Claim=true) const;
+    Arg *getLastArg(options::ID Id0, options::ID Id1, options::ID Id2,
+                    bool Claim=true) const;
 
     /// getArgString - Return the input argument string at \arg Index.
     virtual const char *getArgString(unsigned Index) const = 0;
diff --git a/clang/include/clang/Driver/Options.def b/clang/include/clang/Driver/Options.def
index abd07a92b1a..af108a85ebd 100644
--- a/clang/include/clang/Driver/Options.def
+++ b/clang/include/clang/Driver/Options.def
@@ -420,7 +420,7 @@ OPTION("-fno-math-errno", fno_math_errno, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-pascal-strings", fno_pascal_strings, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-show-column", fno_show_column, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-show-source-location", fno_show_source_location, Flag, f_Group, INVALID, "", 0, 0, 0)
-OPTION("-fno-stack-protector", fno_stack_protector, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
+OPTION("-fno-stack-protector", fno_stack_protector, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-strict-aliasing", fno_strict_aliasing, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-unit-at-a-time", fno_unit_at_a_time, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fno-unwind-tables", fno_unwind_tables, Flag, f_Group, INVALID, "", 0, 0, 0)
@@ -450,7 +450,8 @@ OPTION("-framework", framework, Separate, INVALID, INVALID, "l", 0, 0, 0)
 OPTION("-fshow-source-location", fshow_source_location, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fsigned-bitfields", fsigned_bitfields, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fsigned-char", fsigned_char, Flag, f_Group, INVALID, "", 0, 0, 0)
-OPTION("-fstack-protector", fstack_protector, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
+OPTION("-fstack-protector-all", fstack_protector_all, Flag, f_Group, INVALID, "", 0, 0, 0)
+OPTION("-fstack-protector", fstack_protector, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fstrict-aliasing", fstrict_aliasing, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fsyntax-only", fsyntax_only, Flag, INVALID, INVALID, "d", 0, 0, 0)
 OPTION("-ftemplate-depth-", ftemplate_depth_, Joined, f_Group, INVALID, "", 0, 0, 0)