Implemented support for C++ Exceptions

We implement the Itanium ABI unwinding base-API, and leave the
C++-specific parts to libcxxabi.

Co-authored-by: Lukas Wölfer <lukas.woelfer@rwth-aachen.de>

1 files changed, 60 insertions, 0 deletions

diff --git a/test/CXX/symex/libc++/general_catch.cpp b/test/CXX/symex/libc++/general_catch.cpp
new file mode 100644
index 00000000..ee7f9983
--- /dev/null
+++ b/test/CXX/symex/libc++/general_catch.cpp
@@ -0,0 +1,60 @@
+// REQUIRES: not-msan
+// Disabling msan because it times out on CI
+// REQUIRES: libcxx
+// RUN: %clangxx %s -emit-llvm %O0opt -c -std=c++11 -I "%libcxx_include" -g -nostdinc++ -o %t1.bc
+// RUN: rm -rf %t.klee-out
+// RUN: %klee --output-dir=%t.klee-out --libc=uclibc --libcxx %t1.bc 2>&1 | FileCheck %s
+
+#include "klee/klee.h"
+#include <cassert>
+#include <cstdio>
+
+struct CustomStruct {
+  int a;
+};
+
+int thrower(int x) {
+  if (x == 0) {
+    CustomStruct p;
+    throw p;
+  } else if (x == 1) {
+    throw 7;
+  } else if (x == 2) {
+    throw new CustomStruct();
+  } else {
+    throw &thrower;
+  }
+}
+
+int catcher(int x) {
+  try {
+    thrower(x);
+  } catch (int ex) {
+    printf("Caught int\n");
+    // CHECK-DAG: Caught int
+    return 1;
+  } catch (CustomStruct ex) {
+    printf("Caught normal CustomStruct\n");
+    // CHECK-DAG: Caught normal CustomStruct
+    return 2;
+  } catch (CustomStruct *ex) {
+    printf("Caught pointer CustomStruct\n");
+    // CHECK-DAG: Caught pointer CustomStruct
+    return 3;
+  } catch (...) {
+    printf("Caught general exception\n");
+    // CHECK-DAG: Caught general exception
+    return 4;
+  }
+  // Unreachable instruction
+  assert(0);
+  return 0;
+}
+
+int main(int argc, char **args) {
+  int x = klee_int("x");
+  int res = catcher(x);
+  return res;
+}
+
+// CHECK-DAG: KLEE: done: completed paths = 4