rationale-getelementptr-replace

A LLVM IR transformation pass to mark and insert check on getelementptr instrustions.

the pass has to be running on EP_ModuleOptimizerEarly, otherwise(no mark, early_as_possible and after_optimize) will cause a random kernel corruption.

commmands

 2009  make CC=clang-12 O=out-all-inst/ -j16 "KCFLAGS=-Xclang -load -Xclang /home/wangzc/Desktop/experiment/rationale-getelementptr-replace/transform/libTransPass.so" 
 2010  sudo make CC=clang-12 O=out-all-inst/ -j16 "KCFLAGS=-Xclang -load -Xclang /home/wangzc/Desktop/experiment/rationale-getelementptr-replace/transform/libTransPass.so" modules_install
 2011  sudo make CC=clang-12 O=out-all-inst/ -j16 "KCFLAGS=-Xclang -load -Xclang /home/wangzc/Desktop/experiment/rationale-getelementptr-replace/transform/libTransPass.so" install

getelementptr

  %2 = alloca %struct.s*, align 8
  %4 = load %struct.s*, %struct.s** %2, align 8
  %5 = getelementptr inbounds %struct.s, %struct.s* %4, i32 0, i32 0
  store i64 2, i64* %5, align 8

  st->a = 2;