Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor)

third_party/tcmalloc/chromium/src/tests/current_allocated_bytes_test.cc

+// Copyright (c) 2011, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// ---
+//
+// Author: Craig Silverstein
+
+// This tests the accounting done by tcmalloc.  When we allocate and
+// free a small buffer, the number of bytes used by the application
+// before the alloc+free should match the number of bytes used after.
+// However, the internal data structures used by tcmalloc will be
+// quite different -- new spans will have been allocated, etc.  This
+// is, thus, a simple test that we account properly for the internal
+// data structures, so that we report the actual application-used
+// bytes properly.
+
+#include "config_for_unittests.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <google/malloc_extension.h>
+#include "base/logging.h"
+
+const char kCurrent[] = "generic.current_allocated_bytes";
+
+int main() {
+  // We don't do accounting right when using debugallocation.cc, so
+  // turn off the test then.  TODO(csilvers): get this working too.
+#ifdef NDEBUG
+  size_t before_bytes, after_bytes;
+  MallocExtension::instance()->GetNumericProperty(kCurrent, &before_bytes);
+  free(malloc(200));
+  MallocExtension::instance()->GetNumericProperty(kCurrent, &after_bytes);
+
+  CHECK_EQ(before_bytes, after_bytes);
+#endif
+  printf("PASS\n");
+  return 0;
+}