From 67849d56c3ce2459b8681da5e7935289018dcdbb Mon Sep 17 00:00:00 2001 From: Evgeniy Stepanov Date: Tue, 15 Dec 2015 23:00:08 +0000 Subject: Cross-DSO control flow integrity (LLVM part). An LTO pass that generates a __cfi_check() function that validates a call based on a hash of the call-site-known type and the target pointer. llvm-svn: 255693 --- llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'llvm/lib/Transforms/IPO/PassManagerBuilder.cpp') diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index 6f709937f86..0d8982774d9 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -613,6 +613,10 @@ void PassManagerBuilder::populateLTOPassManager(legacy::PassManagerBase &PM) { if (OptLevel > 1) addLTOOptimizationPasses(PM); + // Create a function that performs CFI checks for cross-DSO calls with targets + // in the current module. + PM.add(createCrossDSOCFIPass()); + // Lower bit sets to globals. This pass supports Clang's control flow // integrity mechanisms (-fsanitize=cfi*) and needs to run at link time if CFI // is enabled. The pass does nothing if CFI is disabled. -- cgit v1.2.3