[asan] Make vector asan annotations exception-friendly

Fix vector asan annotations with RAII.
Add a test.
Also, remove one dead function.
Review: http://reviews.llvm.org/D4170



git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@216995 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/sequences/vector/asan_throw.pass.cc

@@ -0,0 +1,198 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// Test asan vector annotations with a class that throws in a CTOR.
+
+#include <vector>
+#include <cassert>
+
+#include "asan_testing.h"
+
+class X {
+public:
+  X(const X &x) { Init(x.a); }
+  X(char arg) { Init(arg); }
+  X() { Init(42); }
+  X &operator=(const X &x) {
+    Init(x.a);
+    return *this;
+  }
+  void Init(char arg) {
+    if (arg == 42)
+      throw 0;
+    if (arg == 66)
+      arg = 42;
+    a = arg;
+  }
+  char get() const { return a; }
+  void set(char arg) { a = arg; }
+
+private:
+  char a;
+};
+
+void test_push_back() {
+  std::vector<X> v;
+  v.reserve(2);
+  v.push_back(X(2));
+  assert(v.size() == 1);
+  try {
+    v.push_back(X(66));
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 1);
+  }
+  assert(v.size() == 1);
+  assert(is_contiguous_container_asan_correct(v));
+}
+
+void test_emplace_back() {
+#ifndef _LIBCPP_HAS_NO_VARIADICS
+  std::vector<X> v;
+  v.reserve(2);
+  v.push_back(X(2));
+  assert(v.size() == 1);
+  try {
+    v.emplace_back(42);
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 1);
+  }
+  assert(v.size() == 1);
+  assert(is_contiguous_container_asan_correct(v));
+#endif // _LIBCPP_HAS_NO_VARIADICS
+}
+
+void test_insert_range() {
+  std::vector<X> v;
+  v.reserve(4);
+  v.push_back(X(1));
+  v.push_back(X(2));
+  assert(v.size() == 2);
+  assert(v.capacity() >= 4);
+  try {
+    char a[2] = {21, 42};
+    v.insert(v.end(), a, a + 2);
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 3);
+  }
+  assert(v.size() == 3);
+  assert(is_contiguous_container_asan_correct(v));
+}
+
+void test_insert() {
+  std::vector<X> v;
+  v.reserve(3);
+  v.insert(v.end(), X(1));
+  v.insert(v.begin(), X(2));
+  assert(v.size() == 2);
+  try {
+    v.insert(v.end(), X(66));
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 2);
+  }
+  assert(v.size() == 2);
+  assert(is_contiguous_container_asan_correct(v));
+}
+
+void test_emplace() {
+#ifndef _LIBCPP_HAS_NO_VARIADICS
+  std::vector<X> v;
+  v.reserve(3);
+  v.insert(v.end(), X(1));
+  v.insert(v.begin(), X(2));
+  assert(v.size() == 2);
+  try {
+    v.emplace(v.end(), 42);
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 2);
+  }
+  assert(v.size() == 2);
+  assert(is_contiguous_container_asan_correct(v));
+#endif // _LIBCPP_HAS_NO_VARIADICS
+}
+
+void test_insert_range2() {
+  std::vector<X> v;
+  v.reserve(4);
+  v.insert(v.end(), X(1));
+  v.insert(v.begin(), X(2));
+  assert(v.size() == 2);
+  assert(v.capacity() >= 4);
+  try {
+    char a[2] = {10, 42};
+    v.insert(v.begin(), a, a + 2);
+    assert(0);
+  } catch (int e) {
+    assert(v.size() <= 4);
+    assert(is_contiguous_container_asan_correct(v));
+    return;
+  }
+  assert(0);
+}
+
+void test_insert_n() {
+  std::vector<X> v;
+  v.reserve(10);
+  v.insert(v.end(), X(1));
+  v.insert(v.begin(), X(2));
+  assert(v.size() == 2);
+  try {
+    v.insert(v.begin(), 1, X(66));
+    assert(0);
+  } catch (int e) {
+    assert(v.size() <= 3);
+    assert(is_contiguous_container_asan_correct(v));
+    return;
+  }
+  assert(0);
+}
+
+void test_resize() {
+  std::vector<X> v;
+  v.reserve(3);
+  v.push_back(X(0));
+  try {
+    v.resize(3);
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 1);
+  }
+  assert(v.size() == 1);
+  assert(is_contiguous_container_asan_correct(v));
+}
+
+void test_resize_param() {
+  std::vector<X> v;
+  v.reserve(3);
+  v.push_back(X(0));
+  try {
+    v.resize(3, X(66));
+    assert(0);
+  } catch (int e) {
+    assert(v.size() == 1);
+  }
+  assert(v.size() == 1);
+  assert(is_contiguous_container_asan_correct(v));
+}
+
+int main() {
+  test_push_back();
+  test_emplace_back();
+  test_insert_range();
+  test_insert();
+  test_emplace();
+  test_insert_range2();
+  test_insert_n();
+  test_resize();
+  test_resize_param();
+}

test/support/asan_testing.h

@@ -19,7 +19,7 @@ extern "C" int __sanitizer_verify_contiguous_container
 template <typename T, typename Alloc>
 bool is_contiguous_container_asan_correct ( const std::vector<T, Alloc> &c )
 {
-    if ( std::is_same<Alloc, std::allocator<T>>::value && c.data() != NULL)
+    if ( std::is_same<Alloc, std::allocator<T> >::value && c.data() != NULL)
         return __sanitizer_verify_contiguous_container (
             c.data(), c.data() + c.size(), c.data() + c.capacity()) != 0;
     return true;
@@ -34,4 +34,4 @@ bool is_contiguous_container_asan_correct ( const std::vector<T, Alloc> &c )
 #endif
  
 
-#endif  // ASAN_TESTING_H
+#endif  // ASAN_TESTING_H