From 4ccb533158d40e15db9e9f2ade9bb28c3f83f38e Mon Sep 17 00:00:00 2001
From: Pavel Yatcheniy <yatcheniy.pavel@huawei.com>
Date: Thu, 28 Jan 2021 17:51:04 +0300
Subject: Support UBSan-enabled binaries

---
 lib/Core/SpecialFunctionHandler.cpp | 37 +------------------------------------
 lib/Core/SpecialFunctionHandler.h   |  6 +-----
 2 files changed, 2 insertions(+), 41 deletions(-)

(limited to 'lib')

diff --git a/lib/Core/SpecialFunctionHandler.cpp b/lib/Core/SpecialFunctionHandler.cpp
index 2b788d60..f4b09f36 100644
--- a/lib/Core/SpecialFunctionHandler.cpp
+++ b/lib/Core/SpecialFunctionHandler.cpp
@@ -32,7 +32,7 @@
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Module.h"
 
-#include <errno.h>
+#include <cerrno>
 #include <sstream>
 
 using namespace llvm;
@@ -139,13 +139,6 @@ static SpecialFunctionHandler::HandlerInfo handlerInfo[] = {
   // operator new(unsigned long)
   add("_Znwm", handleNew, true),
 
-  // Run clang with -fsanitize=signed-integer-overflow and/or
-  // -fsanitize=unsigned-integer-overflow
-  add("__ubsan_handle_add_overflow", handleAddOverflow, false),
-  add("__ubsan_handle_sub_overflow", handleSubOverflow, false),
-  add("__ubsan_handle_mul_overflow", handleMulOverflow, false),
-  add("__ubsan_handle_divrem_overflow", handleDivRemOverflow, false),
-
 #undef addDNR
 #undef add
 };
@@ -878,31 +871,3 @@ void SpecialFunctionHandler::handleMarkGlobal(ExecutionState &state,
     mo->isGlobal = true;
   }
 }
-
-void SpecialFunctionHandler::handleAddOverflow(
-    ExecutionState &state, KInstruction *target,
-    std::vector<ref<Expr>> &arguments) {
-  executor.terminateStateOnError(state, "overflow on addition",
-                                 StateTerminationType::Overflow);
-}
-
-void SpecialFunctionHandler::handleSubOverflow(
-    ExecutionState &state, KInstruction *target,
-    std::vector<ref<Expr>> &arguments) {
-  executor.terminateStateOnError(state, "overflow on subtraction",
-                                 StateTerminationType::Overflow);
-}
-
-void SpecialFunctionHandler::handleMulOverflow(
-    ExecutionState &state, KInstruction *target,
-    std::vector<ref<Expr>> &arguments) {
-  executor.terminateStateOnError(state, "overflow on multiplication",
-                                 StateTerminationType::Overflow);
-}
-
-void SpecialFunctionHandler::handleDivRemOverflow(
-    ExecutionState &state, KInstruction *target,
-    std::vector<ref<Expr>> &arguments) {
-  executor.terminateStateOnError(state, "overflow on division or remainder",
-                                 StateTerminationType::Overflow);
-}
diff --git a/lib/Core/SpecialFunctionHandler.h b/lib/Core/SpecialFunctionHandler.h
index a9f7100d..9487fdf5 100644
--- a/lib/Core/SpecialFunctionHandler.h
+++ b/lib/Core/SpecialFunctionHandler.h
@@ -34,7 +34,7 @@ namespace klee {
                                                     KInstruction *target, 
                                                     std::vector<ref<Expr> > 
                                                       &arguments);
-    typedef std::map<const llvm::Function*, 
+    typedef std::map<const llvm::Function*,
                      std::pair<Handler,bool> > handlers_ty;
 
     handlers_ty handlers;
@@ -144,10 +144,6 @@ namespace klee {
     HANDLER(handleUnderConstrained);
     HANDLER(handleWarning);
     HANDLER(handleWarningOnce);
-    HANDLER(handleAddOverflow);
-    HANDLER(handleMulOverflow);
-    HANDLER(handleSubOverflow);
-    HANDLER(handleDivRemOverflow);
 #undef HANDLER
   };
 } // End klee namespace
-- 
cgit 1.4.1