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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string.h>
#include <string>
#include <utility>
#include "base/logging.h"
#include "base/strings/string_piece.h"
#include "mojo/edk/test/mojo_test_base.h"
#include "mojo/public/c/system/types.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace edk {
namespace {
using SharedBufferTest = test::MojoTestBase;
TEST_F(SharedBufferTest, CreateSharedBuffer) {
const std::string message = "hello";
MojoHandle h = CreateBuffer(message.size());
WriteToBuffer(h, 0, message);
ExpectBufferContents(h, 0, message);
}
TEST_F(SharedBufferTest, DuplicateSharedBuffer) {
const std::string message = "hello";
MojoHandle h = CreateBuffer(message.size());
WriteToBuffer(h, 0, message);
MojoHandle dupe = DuplicateBuffer(h);
ExpectBufferContents(dupe, 0, message);
}
TEST_F(SharedBufferTest, PassSharedBufferLocal) {
const std::string message = "hello";
MojoHandle h = CreateBuffer(message.size());
WriteToBuffer(h, 0, message);
MojoHandle dupe = DuplicateBuffer(h);
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
WriteMessageWithHandles(p0, "...", &dupe, 1);
EXPECT_EQ("...", ReadMessageWithHandles(p1, &dupe, 1));
ExpectBufferContents(dupe, 0, message);
}
#if !defined(OS_IOS)
// Reads a single message with a shared buffer handle, maps the buffer, copies
// the message contents into it, then exits.
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(CopyToBufferClient, SharedBufferTest, h) {
MojoHandle b;
std::string message = ReadMessageWithHandles(h, &b, 1);
WriteToBuffer(b, 0, message);
EXPECT_EQ("quit", ReadMessage(h));
}
TEST_F(SharedBufferTest, PassSharedBufferCrossProcess) {
const std::string message = "hello";
MojoHandle b = CreateBuffer(message.size());
RUN_CHILD_ON_PIPE(CopyToBufferClient, h)
MojoHandle dupe = DuplicateBuffer(b);
WriteMessageWithHandles(h, message, &dupe, 1);
WriteMessage(h, "quit");
END_CHILD()
ExpectBufferContents(b, 0, message);
}
// Creates a new buffer, maps it, writes a message contents to it, unmaps it,
// and finally passes it back to the parent.
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(CreateBufferClient, SharedBufferTest, h) {
std::string message = ReadMessage(h);
MojoHandle b = CreateBuffer(message.size());
WriteToBuffer(b, 0, message);
WriteMessageWithHandles(h, "have a buffer", &b, 1);
EXPECT_EQ("quit", ReadMessage(h));
}
TEST_F(SharedBufferTest, PassSharedBufferFromChild) {
const std::string message = "hello";
MojoHandle b;
RUN_CHILD_ON_PIPE(CreateBufferClient, h)
WriteMessage(h, message);
ReadMessageWithHandles(h, &b, 1);
WriteMessage(h, "quit");
END_CHILD()
ExpectBufferContents(b, 0, message);
}
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(CreateAndPassBuffer, SharedBufferTest, h) {
// Receive a pipe handle over the primordial pipe. This will be connected to
// another child process.
MojoHandle other_child;
std::string message = ReadMessageWithHandles(h, &other_child, 1);
// Create a new shared buffer.
MojoHandle b = CreateBuffer(message.size());
// Send a copy of the buffer to the parent and the other child.
MojoHandle dupe = DuplicateBuffer(b);
WriteMessageWithHandles(h, "", &b, 1);
WriteMessageWithHandles(other_child, "", &dupe, 1);
EXPECT_EQ("quit", ReadMessage(h));
WriteMessage(h, "ok");
}
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(ReceiveAndEditBuffer, SharedBufferTest, h) {
// Receive a pipe handle over the primordial pipe. This will be connected to
// another child process (running CreateAndPassBuffer).
MojoHandle other_child;
std::string message = ReadMessageWithHandles(h, &other_child, 1);
// Receive a shared buffer from the other child.
MojoHandle b;
ReadMessageWithHandles(other_child, &b, 1);
// Write the message from the parent into the buffer and exit.
WriteToBuffer(b, 0, message);
EXPECT_EQ(MOJO_RESULT_OK, MojoClose(b));
EXPECT_EQ("quit", ReadMessage(h));
WriteMessage(h, "ok");
}
TEST_F(SharedBufferTest, PassSharedBufferFromChildToChild) {
const std::string message = "hello";
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
MojoHandle b;
RUN_CHILD_ON_PIPE(CreateAndPassBuffer, h0)
RUN_CHILD_ON_PIPE(ReceiveAndEditBuffer, h1)
// Send one end of the pipe to each child. The first child will create
// and pass a buffer to the second child and back to us. The second child
// will write our message into the buffer.
WriteMessageWithHandles(h0, message, &p0, 1);
WriteMessageWithHandles(h1, message, &p1, 1);
// Receive the buffer back from the first child.
ReadMessageWithHandles(h0, &b, 1);
WriteMessage(h1, "quit");
EXPECT_EQ("ok", ReadMessage(h1));
END_CHILD()
WriteMessage(h0, "quit");
EXPECT_EQ("ok", ReadMessage(h0));
END_CHILD()
// The second child should have written this message.
ExpectBufferContents(b, 0, message);
}
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(CreateAndPassBufferParent, SharedBufferTest,
parent) {
RUN_CHILD_ON_PIPE(CreateAndPassBuffer, child)
// Read a pipe from the parent and forward it to our child.
MojoHandle pipe;
std::string message = ReadMessageWithHandles(parent, &pipe, 1);
WriteMessageWithHandles(child, message, &pipe, 1);
// Read a buffer handle from the child and pass it back to the parent.
MojoHandle buffer;
EXPECT_EQ("", ReadMessageWithHandles(child, &buffer, 1));
WriteMessageWithHandles(parent, "", &buffer, 1);
EXPECT_EQ("quit", ReadMessage(parent));
WriteMessage(child, "quit");
EXPECT_EQ("ok", ReadMessage(child));
WriteMessage(parent, "ok");
END_CHILD()
}
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(ReceiveAndEditBufferParent, SharedBufferTest,
parent) {
RUN_CHILD_ON_PIPE(ReceiveAndEditBuffer, child)
// Read a pipe from the parent and forward it to our child.
MojoHandle pipe;
std::string message = ReadMessageWithHandles(parent, &pipe, 1);
WriteMessageWithHandles(child, message, &pipe, 1);
EXPECT_EQ("quit", ReadMessage(parent));
WriteMessage(child, "quit");
EXPECT_EQ("ok", ReadMessage(child));
WriteMessage(parent, "ok");
END_CHILD()
}
TEST_F(SharedBufferTest, PassHandleBetweenCousins) {
const std::string message = "hello";
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
// Spawn two children who will each spawn their own child. Make sure the
// grandchildren (cousins to each other) can pass platform handles.
MojoHandle b;
RUN_CHILD_ON_PIPE(CreateAndPassBufferParent, child1)
RUN_CHILD_ON_PIPE(ReceiveAndEditBufferParent, child2)
MojoHandle pipe[2];
CreateMessagePipe(&pipe[0], &pipe[1]);
WriteMessageWithHandles(child1, message, &pipe[0], 1);
WriteMessageWithHandles(child2, message, &pipe[1], 1);
// Receive the buffer back from the first child.
ReadMessageWithHandles(child1, &b, 1);
WriteMessage(child2, "quit");
EXPECT_EQ("ok", ReadMessage(child2));
END_CHILD()
WriteMessage(child1, "quit");
EXPECT_EQ("ok", ReadMessage(child1));
END_CHILD()
// The second grandchild should have written this message.
ExpectBufferContents(b, 0, message);
}
#endif // !defined(OS_IOS)
} // namespace
} // namespace edk
} // namespace mojo
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