TestVolatileBuffer.cpp

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "gtest/gtest.h"

#include "mozilla/VolatileBuffer.h"

#include <string.h>

#if defined(ANDROID)

#  include <fcntl.h>

#  include <linux/ashmem.h>

#  include <sys/ioctl.h>

#  include <sys/stat.h>

#  include <sys/types.h>

#elif defined(XP_DARWIN)

#  include <mach/mach.h>

#endif

using namespace mozilla;

TEST(VolatileBufferTest, HeapVolatileBuffersWork)

  RefPtr<VolatileBuffer> heapbuf = new VolatileBuffer();

  ASSERT_TRUE(heapbuf)

  << "Failed to create VolatileBuffer";

  ASSERT_TRUE(heapbuf->Init(512))

  << "Failed to initialize VolatileBuffer";

  VolatileBufferPtr<char> ptr(heapbuf);

  EXPECT_FALSE(ptr.WasBufferPurged())

      << "Buffer should not be purged immediately after initialization";

  EXPECT_TRUE(ptr) << "Couldn't get pointer from VolatileBufferPtr";

TEST(VolatileBufferTest, RealVolatileBuffersWork)

  RefPtr<VolatileBuffer> buf = new VolatileBuffer();

  ASSERT_TRUE(buf)

  << "Failed to create VolatileBuffer";

  ASSERT_TRUE(buf->Init(16384))

  << "Failed to initialize VolatileBuffer";

  const char teststr[] = "foobar";

    VolatileBufferPtr<char> ptr(buf);

    EXPECT_FALSE(ptr.WasBufferPurged())

        << "Buffer should not be purged immediately after initialization";

    EXPECT_TRUE(ptr) << "Couldn't get pointer from VolatileBufferPtr";

      VolatileBufferPtr<char> ptr2(buf);

      EXPECT_FALSE(ptr.WasBufferPurged())

          << "Failed to lock buffer again while currently locked";

      ASSERT_TRUE(ptr2)

      << "Didn't get a pointer on the second lock";

      strcpy(ptr2, teststr);

    VolatileBufferPtr<char> ptr(buf);

    EXPECT_FALSE(ptr.WasBufferPurged())

        << "Buffer was immediately purged after unlock";

    EXPECT_STREQ(ptr, teststr) << "Buffer failed to retain data after unlock";

  // Test purging if we know how to

#if defined(XP_DARWIN)

  int state;

  vm_purgable_control(mach_task_self(), (vm_address_t)NULL,

                      VM_PURGABLE_PURGE_ALL, &state);

#else

  return;

#endif

  EXPECT_GT(buf->NonHeapSizeOfExcludingThis(), 0ul)

      << "Buffer should not be allocated on heap";

    VolatileBufferPtr<char> ptr(buf);

    EXPECT_TRUE(ptr.WasBufferPurged())

        << "Buffer should not be unpurged after forced purge";

    EXPECT_STRNE(ptr, teststr) << "Purge did not actually purge data";

    VolatileBufferPtr<char> ptr(buf);

    EXPECT_FALSE(ptr.WasBufferPurged()) << "Buffer still purged after lock";