Load libraries in breadth-first order

  This patch fixes the problem with symbol search order
  for dlsym(RTLD_DEFAULT/RTLD_NEXT, .) by loading libraries
  and ld_preloads in correct order.

Bug: https://code.google.com/p/android/issues/detail?id=74255
Attempt: 2

(cherry picked from commit 14669a939d113214a4a20b9318fca0992d5453f0)

Change-Id: Id87540c96a2242220967b6fa5d84ddcd829e2b97

1 files changed, 101 insertions, 0 deletions

diff --git a/tests/uniqueptr_test.cpp b/tests/uniqueptr_test.cpp
new file mode 100644
index 000000000..4b6608af2
--- /dev/null
+++ b/tests/uniqueptr_test.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <private/UniquePtr.h>
+
+static int cCount = 0;
+struct C {
+  C() { ++cCount; }
+  ~C() { --cCount; }
+};
+
+static bool freed = false;
+struct Freer {
+  void operator() (int* p) {
+    ASSERT_EQ(123, *p);
+    free(p);
+    freed = true;
+  }
+};
+
+TEST(UniquePtr, smoke) {
+  //
+  // UniquePtr<T> tests...
+  //
+
+  // Can we free a single object?
+  {
+    UniquePtr<C> c(new C);
+    ASSERT_TRUE(cCount == 1);
+  }
+  ASSERT_TRUE(cCount == 0);
+  // Does release work?
+  C* rawC;
+  {
+      UniquePtr<C> c(new C);
+      ASSERT_TRUE(cCount == 1);
+      rawC = c.release();
+  }
+  ASSERT_TRUE(cCount == 1);
+  delete rawC;
+  // Does reset work?
+  {
+      UniquePtr<C> c(new C);
+      ASSERT_TRUE(cCount == 1);
+      c.reset(new C);
+      ASSERT_TRUE(cCount == 1);
+  }
+  ASSERT_TRUE(cCount == 0);
+
+  //
+  // UniquePtr<T[]> tests...
+  //
+
+  // Can we free an array?
+  {
+      UniquePtr<C[]> cs(new C[4]);
+      ASSERT_TRUE(cCount == 4);
+  }
+  ASSERT_TRUE(cCount == 0);
+  // Does release work?
+  {
+      UniquePtr<C[]> c(new C[4]);
+      ASSERT_TRUE(cCount == 4);
+      rawC = c.release();
+  }
+  ASSERT_TRUE(cCount == 4);
+  delete[] rawC;
+  // Does reset work?
+  {
+      UniquePtr<C[]> c(new C[4]);
+      ASSERT_TRUE(cCount == 4);
+      c.reset(new C[2]);
+      ASSERT_TRUE(cCount == 2);
+  }
+  ASSERT_TRUE(cCount == 0);
+
+  //
+  // Custom deleter tests...
+  //
+  ASSERT_TRUE(!freed);
+  {
+      UniquePtr<int, Freer> i(reinterpret_cast<int*>(malloc(sizeof(int))));
+      *i = 123;
+  }
+  ASSERT_TRUE(freed);
+}