Instrumented malloc and free with dummy functions.

src/IceInstrumentation.cpp

Index: src/IceInstrumentation.cpp
diff --git a/src/IceInstrumentation.cpp b/src/IceInstrumentation.cpp
index fc2a4a5431f454b2cc77fdba28e6fd1b05ad59ec..14a7e18d9662d2b38651046ae07ed770cf1bcbfc 100644
--- a/src/IceInstrumentation.cpp
+++ b/src/IceInstrumentation.cpp
@@ -29,6 +29,11 @@ void Instrumentation::instrumentFunc(Cfg *Func) {
   assert(Func);
   assert(!Func->getNodes().empty());
 
+  // TODO(tlively): Create a more precise blacklist than this
+  std::string FuncName = Func->getFunctionName().toStringOrEmpty();
+  if (FuncName.substr(0, 1) == "_" && FuncName != "_start")
+    return;
+
   LoweringContext Context;
   Context.init(Func->getNodes().front());
   instrumentFuncStart(Context);
@@ -42,7 +47,7 @@ void Instrumentation::instrumentFunc(Cfg *Func) {
     }
   }
 
-  if (Func->getFunctionName().toStringOrEmpty() == "_start")
+  if (FuncName == "_start")
     instrumentStart(Func);
 }