From d157a9bc8ba1085cc4808c6941412322a7fd884e Mon Sep 17 00:00:00 2001 From: Andrew Paverd Date: Mon, 28 Oct 2019 13:22:19 +0000 Subject: Add Windows Control Flow Guard checks (/guard:cf). Summary: A new function pass (Transforms/CFGuard/CFGuard.cpp) inserts CFGuard checks on indirect function calls, using either the check mechanism (X86, ARM, AArch64) or or the dispatch mechanism (X86-64). The check mechanism requires a new calling convention for the supported targets. The dispatch mechanism adds the target as an operand bundle, which is processed by SelectionDAG. Another pass (CodeGen/CFGuardLongjmp.cpp) identifies and emits valid longjmp targets, as required by /guard:cf. This feature is enabled using the `cfguard` CC1 option. Reviewers: thakis, rnk, theraven, pcc Subscribers: ychen, hans, metalcanine, dmajor, tomrittervg, alex, mehdi_amini, mgorny, javed.absar, kristof.beyls, hiraditya, steven_wu, dexonsmith, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65761 --- clang/lib/Frontend/CompilerInvocation.cpp | 1 + 1 file changed, 1 insertion(+) (limited to 'clang/lib/Frontend/CompilerInvocation.cpp') diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp index f6e6f71b280..f197a67e7a3 100644 --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -1003,6 +1003,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK, Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name); Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier); + Opts.ControlFlowGuardNoChecks = Args.hasArg(OPT_cfguard_no_checks); Opts.ControlFlowGuard = Args.hasArg(OPT_cfguard); Opts.DisableGCov = Args.hasArg(OPT_test_coverage); -- cgit v1.2.3