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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "chrome/common/ipc_message.h"
#include "chrome/common/ipc_message_utils.h"
#include "gtest/gtest.h"
#include "mozilla/RandomNum.h"
#include "mozilla/ipc/BigBuffer.h"
namespace mozilla::ipc {
static bool SerializeAndDeserialize(BigBuffer&& aIn, BigBuffer* aOut) {
IPC::Message msg(MSG_ROUTING_NONE, 0);
{
IPC::MessageWriter writer(msg);
IPC::WriteParam(&writer, std::move(aIn));
}
EXPECT_EQ(aIn.Size(), 0u);
IPC::MessageReader reader(msg);
return IPC::ReadParam(&reader, aOut);
}
TEST(BigBuffer, Empty)
{
BigBuffer in(0);
EXPECT_EQ(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), 0u);
BigBuffer out;
ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
EXPECT_EQ(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), 0u);
EXPECT_EQ(out.GetSharedMemory(), nullptr);
EXPECT_EQ(out.Size(), 0u);
}
TEST(BigBuffer, SmallSize)
{
uint8_t data[]{1, 2, 3};
BigBuffer in{Span(data)};
EXPECT_EQ(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), 3u);
BigBuffer out;
ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
EXPECT_EQ(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), 0u);
EXPECT_EQ(out.GetSharedMemory(), nullptr);
EXPECT_EQ(out.Size(), 3u);
EXPECT_TRUE(out.AsSpan() == Span(data));
}
TEST(BigBuffer, BigSize)
{
// Use something that's unlikely to be a multiple of the page size to ensure
// that the requested size is retained (versus the allocated shmem size).
size_t size = BigBuffer::kShmemThreshold * 2 + 41;
// Generate a large block of random data which will be serialized in a shmem.
nsTArray<uint8_t> data(size);
for (size_t i = 0; i < size; ++i) {
data.AppendElement(mozilla::RandomUint64OrDie());
}
BigBuffer in{Span(data)};
EXPECT_NE(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), size);
EXPECT_EQ(in.GetSharedMemory()->DataAs<uint8_t>(), in.Data());
BigBuffer out;
ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
EXPECT_EQ(in.GetSharedMemory(), nullptr);
EXPECT_EQ(in.Size(), 0u);
EXPECT_NE(out.GetSharedMemory(), nullptr);
EXPECT_EQ(out.Size(), size);
EXPECT_EQ(out.GetSharedMemory()->DataAs<uint8_t>(), out.Data());
EXPECT_TRUE(out.AsSpan() == Span(data));
}
} // namespace mozilla::ipc
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