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multiprocess_message_pipe_unittest.cc
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// Copyright 2013 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 <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/scoped_file.h"
#include "base/files/scoped_temp_dir.h"
#include "base/logging.h"
#include "base/run_loop.h"
#include "base/strings/string_split.h"
#include "base/test/task_environment.h"
#include "build/build_config.h"
#include "mojo/core/handle_signals_state.h"
#include "mojo/core/test/mojo_test_base.h"
#include "mojo/core/test/test_utils.h"
#include "mojo/public/c/system/buffer.h"
#include "mojo/public/c/system/functions.h"
#include "mojo/public/c/system/types.h"
#include "mojo/public/cpp/system/message_pipe.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "mojo/public/cpp/system/wait.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace core {
namespace {
// Temporary helpers to avoid tons of churn as old APIs are removed. These
// support only enough of a subset of the old APIs to satisfy the usage in these
// tests.
//
// TODO(rockot): Remove these.
MojoResult MojoReadMessage(MojoHandle pipe,
void* out_bytes,
uint32_t* num_bytes,
MojoHandle* out_handles,
uint32_t* num_handles,
MojoReadMessageFlags flags) {
std::vector<uint8_t> bytes;
std::vector<ScopedHandle> handles;
MojoResult rv =
ReadMessageRaw(MessagePipeHandle(pipe), &bytes, &handles, flags);
if (rv != MOJO_RESULT_OK)
return rv;
if (num_bytes)
*num_bytes = static_cast<uint32_t>(bytes.size());
if (!bytes.empty()) {
CHECK(out_bytes && num_bytes && *num_bytes >= bytes.size());
memcpy(out_bytes, bytes.data(), bytes.size());
}
if (num_handles)
*num_handles = static_cast<uint32_t>(handles.size());
if (!handles.empty()) {
CHECK(out_handles && num_handles && *num_handles >= handles.size());
for (size_t i = 0; i < handles.size(); ++i)
out_handles[i] = handles[i].release().value();
}
return MOJO_RESULT_OK;
}
MojoResult MojoWriteMessage(MojoHandle pipe,
const void* bytes,
uint32_t num_bytes,
const MojoHandle* handles,
uint32_t num_handles,
MojoWriteMessageFlags flags) {
return WriteMessageRaw(MessagePipeHandle(pipe), bytes, num_bytes, handles,
num_handles, flags);
}
class MultiprocessMessagePipeTest : public test::MojoTestBase {
protected:
// Convenience class for tests which will control command-driven children.
// See the CommandDrivenClient definition below.
class CommandDrivenClientController {
public:
explicit CommandDrivenClientController(MojoHandle h) : h_(h) {}
void Send(const std::string& command) {
WriteMessage(h_, command);
EXPECT_EQ("ok", ReadMessage(h_));
}
void SendHandle(const std::string& name, MojoHandle p) {
WriteMessageWithHandles(h_, "take:" + name, &p, 1);
EXPECT_EQ("ok", ReadMessage(h_));
}
MojoHandle RetrieveHandle(const std::string& name) {
WriteMessage(h_, "return:" + name);
MojoHandle p;
EXPECT_EQ("ok", ReadMessageWithHandles(h_, &p, 1));
return p;
}
void Exit() { WriteMessage(h_, "exit"); }
private:
MojoHandle h_;
};
};
class MultiprocessMessagePipeTestWithPeerSupport
: public MultiprocessMessagePipeTest,
public testing::WithParamInterface<test::MojoTestBase::LaunchType> {
protected:
void SetUp() override {
test::MojoTestBase::SetUp();
set_launch_type(GetParam());
}
};
// For each message received, sends a reply message with the same contents
// repeated twice, until the other end is closed or it receives "quitquitquit"
// (which it doesn't reply to). It'll return the number of messages received,
// not including any "quitquitquit" message, modulo 100.
DEFINE_TEST_CLIENT_WITH_PIPE(EchoEcho, MultiprocessMessagePipeTest, h) {
const std::string quitquitquit("quitquitquit");
int rv = 0;
for (;; rv = (rv + 1) % 100) {
// Wait for our end of the message pipe to be readable.
HandleSignalsState hss;
MojoResult result = WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss);
if (result != MOJO_RESULT_OK) {
// It was closed, probably.
CHECK_EQ(result, MOJO_RESULT_FAILED_PRECONDITION);
CHECK_EQ(hss.satisfied_signals, MOJO_HANDLE_SIGNAL_PEER_CLOSED);
CHECK_EQ(hss.satisfiable_signals, MOJO_HANDLE_SIGNAL_PEER_CLOSED);
break;
} else {
CHECK((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
CHECK((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
}
std::string read_buffer(1000, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(h, &read_buffer[0], &read_buffer_size, nullptr, 0,
MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
VLOG(2) << "Child got: " << read_buffer;
if (read_buffer == quitquitquit) {
VLOG(2) << "Child quitting.";
break;
}
std::string write_buffer = read_buffer + read_buffer;
CHECK_EQ(MojoWriteMessage(h, write_buffer.data(),
static_cast<uint32_t>(write_buffer.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
}
return rv;
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, Basic) {
int exit_code = RunTestClientAndGetExitCode("EchoEcho", [&](MojoHandle h) {
std::string hello("hello");
ASSERT_EQ(
MOJO_RESULT_OK,
MojoWriteMessage(h, hello.data(), static_cast<uint32_t>(hello.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
// The child may or may not have closed its end of the message pipe and died
// (and we may or may not know it yet), so our end may or may not appear as
// writable.
EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(1000, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(h, &read_buffer[0], &read_buffer_size, nullptr, 0,
MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
VLOG(2) << "Parent got: " << read_buffer;
ASSERT_EQ(hello + hello, read_buffer);
std::string quitquitquit("quitquitquit");
CHECK_EQ(MojoWriteMessage(h, quitquitquit.data(),
static_cast<uint32_t>(quitquitquit.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
});
EXPECT_EQ(1, exit_code);
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, QueueMessages) {
static const size_t kNumMessages = 1001;
int exit_code = RunTestClientAndGetExitCode("EchoEcho", [&](MojoHandle h) {
for (size_t i = 0; i < kNumMessages; i++) {
std::string write_buffer(i, 'A' + (i % 26));
ASSERT_EQ(MOJO_RESULT_OK,
MojoWriteMessage(h, write_buffer.data(),
static_cast<uint32_t>(write_buffer.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
}
for (size_t i = 0; i < kNumMessages; i++) {
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
// The child may or may not have closed its end of the message pipe and
// died (and we may or may not know it yet), so our end may or may not
// appear as writable.
ASSERT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
ASSERT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(kNumMessages * 2, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
ASSERT_EQ(MojoReadMessage(h, &read_buffer[0], &read_buffer_size, nullptr,
0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
ASSERT_EQ(std::string(i * 2, 'A' + (i % 26)), read_buffer);
}
const std::string quitquitquit("quitquitquit");
ASSERT_EQ(MOJO_RESULT_OK,
MojoWriteMessage(h, quitquitquit.data(),
static_cast<uint32_t>(quitquitquit.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for it to become readable, which should fail (since we sent
// "quitquitquit").
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
ASSERT_FALSE(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
ASSERT_FALSE(hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE);
});
EXPECT_EQ(static_cast<int>(kNumMessages % 100), exit_code);
}
DEFINE_TEST_CLIENT_WITH_PIPE(CheckSharedBuffer,
MultiprocessMessagePipeTest,
h) {
// Wait for the first message from our parent.
HandleSignalsState hss;
CHECK_EQ(WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
// In this test, the parent definitely doesn't close its end of the message
// pipe before we do.
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
// It should have a shared buffer.
std::string read_buffer(100, '\0');
uint32_t num_bytes = static_cast<uint32_t>(read_buffer.size());
MojoHandle handles[10];
uint32_t num_handlers = std::size(handles); // Maximum number to receive
CHECK_EQ(MojoReadMessage(h, &read_buffer[0], &num_bytes, &handles[0],
&num_handlers, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(num_bytes);
CHECK_EQ(read_buffer, std::string("go 1"));
CHECK_EQ(num_handlers, 1u);
// Make a mapping.
void* buffer;
CHECK_EQ(MojoMapBuffer(handles[0], 0, 100, nullptr, &buffer), MOJO_RESULT_OK);
// Write some stuff to the shared buffer.
static const char kHello[] = "hello";
memcpy(buffer, kHello, sizeof(kHello));
// We should be able to close the dispatcher now.
MojoClose(handles[0]);
// And send a message to signal that we've written stuff.
const std::string go2("go 2");
CHECK_EQ(MojoWriteMessage(h, go2.data(), static_cast<uint32_t>(go2.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
// Now wait for our parent to send us a message.
hss = HandleSignalsState();
CHECK_EQ(WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
read_buffer = std::string(100, '\0');
num_bytes = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(h, &read_buffer[0], &num_bytes, nullptr, 0,
MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(num_bytes);
CHECK_EQ(read_buffer, std::string("go 3"));
// It should have written something to the shared buffer.
static const char kWorld[] = "world!!!";
CHECK_EQ(memcmp(buffer, kWorld, sizeof(kWorld)), 0);
// And we're done.
return 0;
}
TEST_F(MultiprocessMessagePipeTest, SharedBufferPassing) {
RunTestClient("CheckSharedBuffer", [&](MojoHandle h) {
// Make a shared buffer.
MojoCreateSharedBufferOptions options;
options.struct_size = sizeof(options);
options.flags = MOJO_CREATE_SHARED_BUFFER_FLAG_NONE;
MojoHandle shared_buffer;
ASSERT_EQ(MOJO_RESULT_OK,
MojoCreateSharedBuffer(100, &options, &shared_buffer));
MojoSharedBufferInfo buffer_info;
buffer_info.struct_size = sizeof(buffer_info);
ASSERT_EQ(MOJO_RESULT_OK,
MojoGetBufferInfo(shared_buffer, nullptr, &buffer_info));
EXPECT_GE(buffer_info.size, 100U);
// Send the shared buffer.
const std::string go1("go 1");
MojoHandle duplicated_shared_buffer;
ASSERT_EQ(MOJO_RESULT_OK,
MojoDuplicateBufferHandle(shared_buffer, nullptr,
&duplicated_shared_buffer));
buffer_info.size = 0;
ASSERT_EQ(MOJO_RESULT_OK,
MojoGetBufferInfo(shared_buffer, nullptr, &buffer_info));
EXPECT_GE(buffer_info.size, 100U);
MojoHandle handles[1];
handles[0] = duplicated_shared_buffer;
ASSERT_EQ(MOJO_RESULT_OK,
MojoWriteMessage(h, &go1[0], static_cast<uint32_t>(go1.size()),
&handles[0], std::size(handles),
MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for a message from the child.
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(100, '\0');
uint32_t num_bytes = static_cast<uint32_t>(read_buffer.size());
ASSERT_EQ(MOJO_RESULT_OK,
MojoReadMessage(h, &read_buffer[0], &num_bytes, nullptr, 0,
MOJO_READ_MESSAGE_FLAG_NONE));
read_buffer.resize(num_bytes);
ASSERT_EQ(std::string("go 2"), read_buffer);
// After we get it, the child should have written something to the shared
// buffer.
static const char kHello[] = "hello";
void* buffer;
CHECK_EQ(MojoMapBuffer(shared_buffer, 0, 100, nullptr, &buffer),
MOJO_RESULT_OK);
ASSERT_EQ(0, memcmp(buffer, kHello, sizeof(kHello)));
// Now we'll write some stuff to the shared buffer.
static const char kWorld[] = "world!!!";
memcpy(buffer, kWorld, sizeof(kWorld));
// And send a message to signal that we've written stuff.
const std::string go3("go 3");
ASSERT_EQ(MOJO_RESULT_OK,
MojoWriteMessage(h, &go3[0], static_cast<uint32_t>(go3.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for |h| to become readable, which should fail.
hss = HandleSignalsState();
ASSERT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
ASSERT_FALSE(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
ASSERT_FALSE(hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE);
});
}
DEFINE_TEST_CLIENT_WITH_PIPE(CheckPlatformHandleFile,
MultiprocessMessagePipeTest,
h) {
HandleSignalsState hss;
CHECK_EQ(WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
std::string read_buffer(100, '\0');
uint32_t num_bytes = static_cast<uint32_t>(read_buffer.size());
MojoHandle handles[255]; // Maximum number to receive.
uint32_t num_handlers = std::size(handles);
CHECK_EQ(MojoReadMessage(h, &read_buffer[0], &num_bytes, &handles[0],
&num_handlers, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(num_bytes);
char hello[32];
int num_handles = 0;
sscanf(read_buffer.c_str(), "%s %d", hello, &num_handles);
CHECK_EQ(std::string("hello"), std::string(hello));
CHECK_GT(num_handles, 0);
for (int i = 0; i < num_handles; ++i) {
PlatformHandle handle =
UnwrapPlatformHandle(ScopedHandle(Handle(handles[i])));
CHECK(handle.is_valid());
base::ScopedFILE fp = test::FILEFromPlatformHandle(std::move(handle), "r");
CHECK(fp);
std::string fread_buffer(100, '\0');
size_t bytes_read =
fread(&fread_buffer[0], 1, fread_buffer.size(), fp.get());
fread_buffer.resize(bytes_read);
CHECK_EQ(fread_buffer, "world");
}
return 0;
}
#if !BUILDFLAG(IS_ANDROID)
class MultiprocessMessagePipeTestWithPipeCount
: public MultiprocessMessagePipeTest,
public testing::WithParamInterface<size_t> {};
TEST_P(MultiprocessMessagePipeTestWithPipeCount, PlatformHandlePassing) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
RunTestClient("CheckPlatformHandleFile", [&](MojoHandle h) {
std::vector<MojoHandle> handles;
size_t pipe_count = GetParam();
for (size_t i = 0; i < pipe_count; ++i) {
base::FilePath unused;
base::ScopedFILE fp =
CreateAndOpenTemporaryStreamInDir(temp_dir.GetPath(), &unused);
const std::string world("world");
CHECK_EQ(fwrite(&world[0], 1, world.size(), fp.get()), world.size());
fflush(fp.get());
rewind(fp.get());
ScopedHandle handle =
WrapPlatformHandle(test::PlatformHandleFromFILE(std::move(fp)));
ASSERT_TRUE(handle.is_valid());
handles.push_back(handle.release().value());
}
char message[128];
snprintf(message, sizeof(message), "hello %d",
static_cast<int>(pipe_count));
ASSERT_EQ(
MOJO_RESULT_OK,
MojoWriteMessage(h, message, static_cast<uint32_t>(strlen(message)),
&handles[0], static_cast<uint32_t>(handles.size()),
MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for it to become readable, which should fail.
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss));
ASSERT_FALSE(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
ASSERT_FALSE(hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE);
});
}
// Android multi-process tests are not executing the new process. This is flaky.
INSTANTIATE_TEST_SUITE_P(PipeCount,
MultiprocessMessagePipeTestWithPipeCount,
// TODO(rockot): Enable the 128 and 250 pipe cases when
// ChannelPosix and ChannelFuchsia have support for
// sending larger numbers of handles per-message. See
// kMaxAttachedHandles in channel.cc for details.
testing::Values(1u, 64u /*, 128u, 250u*/));
#endif
DEFINE_TEST_CLIENT_WITH_PIPE(CheckMessagePipe, MultiprocessMessagePipeTest, h) {
// Wait for the first message from our parent.
HandleSignalsState hss;
CHECK_EQ(WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
// In this test, the parent definitely doesn't close its end of the message
// pipe before we do.
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
// It should have a message pipe.
MojoHandle handles[10];
uint32_t num_handlers = std::size(handles);
CHECK_EQ(MojoReadMessage(h, nullptr, nullptr, &handles[0], &num_handlers,
MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
CHECK_EQ(num_handlers, 1u);
// Read data from the received message pipe.
CHECK_EQ(WaitForSignals(handles[0], MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
std::string read_buffer(100, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(handles[0], &read_buffer[0], &read_buffer_size,
nullptr, 0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
CHECK_EQ(read_buffer, std::string("hello"));
// Now write some data into the message pipe.
std::string write_buffer = "world";
CHECK_EQ(MojoWriteMessage(handles[0], write_buffer.data(),
static_cast<uint32_t>(write_buffer.size()), nullptr,
0u, MOJO_WRITE_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
MojoClose(handles[0]);
return 0;
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, MessagePipePassing) {
RunTestClient("CheckMessagePipe", [&](MojoHandle h) {
MojoCreateSharedBufferOptions options;
options.struct_size = sizeof(options);
options.flags = MOJO_CREATE_SHARED_BUFFER_FLAG_NONE;
MojoHandle mp1, mp2;
ASSERT_EQ(MOJO_RESULT_OK, MojoCreateMessagePipe(nullptr, &mp1, &mp2));
// Write a string into one end of the new message pipe and send the other
// end.
const std::string hello("hello");
ASSERT_EQ(
MOJO_RESULT_OK,
MojoWriteMessage(mp1, &hello[0], static_cast<uint32_t>(hello.size()),
nullptr, 0, MOJO_WRITE_MESSAGE_FLAG_NONE));
ASSERT_EQ(MOJO_RESULT_OK, MojoWriteMessage(h, nullptr, 0, &mp2, 1,
MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for a message from the child.
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(mp1, MOJO_HANDLE_SIGNAL_READABLE, &hss));
EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(100, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(mp1, &read_buffer[0], &read_buffer_size, nullptr,
0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
CHECK_EQ(read_buffer, std::string("world"));
MojoClose(mp1);
});
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, MessagePipeTwoPassing) {
RunTestClient("CheckMessagePipe", [&](MojoHandle h) {
MojoHandle mp1, mp2;
ASSERT_EQ(MOJO_RESULT_OK, MojoCreateMessagePipe(nullptr, &mp2, &mp1));
// Write a string into one end of the new message pipe and send the other
// end.
const std::string hello("hello");
ASSERT_EQ(
MOJO_RESULT_OK,
MojoWriteMessage(mp1, &hello[0], static_cast<uint32_t>(hello.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
ASSERT_EQ(MOJO_RESULT_OK, MojoWriteMessage(h, nullptr, 0u, &mp2, 1u,
MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for a message from the child.
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(mp1, MOJO_HANDLE_SIGNAL_READABLE, &hss));
EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(100, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(mp1, &read_buffer[0], &read_buffer_size, nullptr,
0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
CHECK_EQ(read_buffer, std::string("world"));
});
}
DEFINE_TEST_CLIENT_WITH_PIPE(DataPipeConsumer, MultiprocessMessagePipeTest, h) {
// Wait for the first message from our parent.
HandleSignalsState hss;
CHECK_EQ(WaitForSignals(h, MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
// In this test, the parent definitely doesn't close its end of the message
// pipe before we do.
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
CHECK_EQ(hss.satisfiable_signals,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE |
MOJO_HANDLE_SIGNAL_PEER_CLOSED | MOJO_HANDLE_SIGNAL_PEER_REMOTE |
MOJO_HANDLE_SIGNAL_QUOTA_EXCEEDED);
// It should have a message pipe.
MojoHandle handles[10];
uint32_t num_handlers = std::size(handles);
CHECK_EQ(MojoReadMessage(h, nullptr, nullptr, &handles[0], &num_handlers,
MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
CHECK_EQ(num_handlers, 1u);
// Read data from the received message pipe.
CHECK_EQ(WaitForSignals(handles[0], MOJO_HANDLE_SIGNAL_READABLE, &hss),
MOJO_RESULT_OK);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE);
CHECK(hss.satisfied_signals & MOJO_HANDLE_SIGNAL_WRITABLE);
CHECK_EQ(hss.satisfiable_signals,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE |
MOJO_HANDLE_SIGNAL_PEER_CLOSED | MOJO_HANDLE_SIGNAL_PEER_REMOTE |
MOJO_HANDLE_SIGNAL_QUOTA_EXCEEDED);
std::string read_buffer(100, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(handles[0], &read_buffer[0], &read_buffer_size,
nullptr, 0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
CHECK_EQ(read_buffer, std::string("hello"));
// Now write some data into the message pipe.
std::string write_buffer = "world";
CHECK_EQ(MojoWriteMessage(handles[0], write_buffer.data(),
static_cast<uint32_t>(write_buffer.size()), nullptr,
0u, MOJO_WRITE_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
MojoClose(handles[0]);
return 0;
}
TEST_F(MultiprocessMessagePipeTest, DataPipeConsumer) {
RunTestClient("DataPipeConsumer", [&](MojoHandle h) {
MojoCreateSharedBufferOptions options;
options.struct_size = sizeof(options);
options.flags = MOJO_CREATE_SHARED_BUFFER_FLAG_NONE;
MojoHandle mp1, mp2;
ASSERT_EQ(MOJO_RESULT_OK, MojoCreateMessagePipe(nullptr, &mp2, &mp1));
// Write a string into one end of the new message pipe and send the other
// end.
const std::string hello("hello");
ASSERT_EQ(
MOJO_RESULT_OK,
MojoWriteMessage(mp1, &hello[0], static_cast<uint32_t>(hello.size()),
nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE));
ASSERT_EQ(MOJO_RESULT_OK, MojoWriteMessage(h, nullptr, 0, &mp2, 1u,
MOJO_WRITE_MESSAGE_FLAG_NONE));
// Wait for a message from the child.
HandleSignalsState hss;
ASSERT_EQ(MOJO_RESULT_OK,
WaitForSignals(mp1, MOJO_HANDLE_SIGNAL_READABLE, &hss));
EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
std::string read_buffer(100, '\0');
uint32_t read_buffer_size = static_cast<uint32_t>(read_buffer.size());
CHECK_EQ(MojoReadMessage(mp1, &read_buffer[0], &read_buffer_size, nullptr,
0, MOJO_READ_MESSAGE_FLAG_NONE),
MOJO_RESULT_OK);
read_buffer.resize(read_buffer_size);
CHECK_EQ(read_buffer, std::string("world"));
MojoClose(mp1);
});
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, CreateMessagePipe) {
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
VerifyTransmission(p0, p1, std::string(10 * 1024 * 1024, 'a'));
VerifyTransmission(p1, p0, std::string(10 * 1024 * 1024, 'e'));
CloseHandle(p0);
CloseHandle(p1);
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, PassMessagePipeLocal) {
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
VerifyTransmission(p0, p1, "testing testing");
VerifyTransmission(p1, p0, "one two three");
MojoHandle p2, p3;
CreateMessagePipe(&p2, &p3);
VerifyTransmission(p2, p3, "testing testing");
VerifyTransmission(p3, p2, "one two three");
// Pass p2 over p0 to p1.
const std::string message = "ceci n'est pas une pipe";
WriteMessageWithHandles(p0, message, &p2, 1);
EXPECT_EQ(message, ReadMessageWithHandles(p1, &p2, 1));
CloseHandle(p0);
CloseHandle(p1);
// Verify that the received handle (now in p2) still works.
VerifyTransmission(p2, p3, "Easy come, easy go; will you let me go?");
VerifyTransmission(p3, p2, "Bismillah! NO! We will not let you go!");
CloseHandle(p2);
CloseHandle(p3);
}
// Echos the primordial channel until "exit".
DEFINE_TEST_CLIENT_WITH_PIPE(ChannelEchoClient,
MultiprocessMessagePipeTest,
h) {
for (;;) {
std::string message = ReadMessage(h);
if (message == "exit")
break;
WriteMessage(h, message);
}
return 0;
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, MultiprocessChannelPipe) {
RunTestClient("ChannelEchoClient", [&](MojoHandle h) {
VerifyEcho(h, "in an interstellar burst");
VerifyEcho(h, "i am back to save the universe");
VerifyEcho(h, std::string(10 * 1024 * 1024, 'o'));
WriteMessage(h, "exit");
});
}
// Receives a pipe handle from the primordial channel and echos on it until
// "exit". Used to test simple pipe transfer across processes via channels.
DEFINE_TEST_CLIENT_WITH_PIPE(EchoServiceClient,
MultiprocessMessagePipeTest,
h) {
MojoHandle p;
ReadMessageWithHandles(h, &p, 1);
for (;;) {
std::string message = ReadMessage(p);
if (message == "exit")
break;
WriteMessage(p, message);
}
return 0;
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport,
PassMessagePipeCrossProcess) {
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
RunTestClient("EchoServiceClient", [&](MojoHandle h) {
// Pass one end of the pipe to the other process.
WriteMessageWithHandles(h, "here take this", &p1, 1);
VerifyEcho(p0, "and you may ask yourself");
VerifyEcho(p0, "where does that highway go?");
VerifyEcho(p0, std::string(20 * 1024 * 1024, 'i'));
WriteMessage(p0, "exit");
});
CloseHandle(p0);
}
// Receives a pipe handle from the primordial channel and reads new handles
// from it. Each read handle establishes a new echo channel.
DEFINE_TEST_CLIENT_WITH_PIPE(EchoServiceFactoryClient,
MultiprocessMessagePipeTest,
h) {
MojoHandle p;
ReadMessageWithHandles(h, &p, 1);
std::vector<Handle> handles(2);
handles[0] = Handle(h);
handles[1] = Handle(p);
std::vector<MojoHandleSignals> signals(2, MOJO_HANDLE_SIGNAL_READABLE);
for (;;) {
size_t index;
CHECK_EQ(
mojo::WaitMany(handles.data(), signals.data(), handles.size(), &index),
MOJO_RESULT_OK);
DCHECK_LE(index, handles.size());
if (index == 0) {
// If data is available on the first pipe, it should be an exit command.
EXPECT_EQ(std::string("exit"), ReadMessage(h));
break;
} else if (index == 1) {
// If the second pipe, it should be a new handle requesting echo service.
MojoHandle echo_request;
ReadMessageWithHandles(p, &echo_request, 1);
handles.push_back(Handle(echo_request));
signals.push_back(MOJO_HANDLE_SIGNAL_READABLE);
} else {
// Otherwise it was one of our established echo pipes. Echo!
WriteMessage(handles[index].value(), ReadMessage(handles[index].value()));
}
}
for (size_t i = 1; i < handles.size(); ++i)
CloseHandle(handles[i].value());
return 0;
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport,
PassMoarMessagePipesCrossProcess) {
MojoHandle echo_factory_proxy, echo_factory_request;
CreateMessagePipe(&echo_factory_proxy, &echo_factory_request);
MojoHandle echo_proxy_a, echo_request_a;
CreateMessagePipe(&echo_proxy_a, &echo_request_a);
MojoHandle echo_proxy_b, echo_request_b;
CreateMessagePipe(&echo_proxy_b, &echo_request_b);
MojoHandle echo_proxy_c, echo_request_c;
CreateMessagePipe(&echo_proxy_c, &echo_request_c);
RunTestClient("EchoServiceFactoryClient", [&](MojoHandle h) {
WriteMessageWithHandles(h, "gief factory naow plz", &echo_factory_request,
1);
WriteMessageWithHandles(echo_factory_proxy, "give me an echo service plz!",
&echo_request_a, 1);
WriteMessageWithHandles(echo_factory_proxy, "give me one too!",
&echo_request_b, 1);
VerifyEcho(echo_proxy_a, "i came here for an argument");
VerifyEcho(echo_proxy_a, "shut your festering gob");
VerifyEcho(echo_proxy_a, "mumble mumble mumble");
VerifyEcho(echo_proxy_b, "wubalubadubdub");
VerifyEcho(echo_proxy_b, "wubalubadubdub");
WriteMessageWithHandles(echo_factory_proxy, "hook me up also thanks",
&echo_request_c, 1);
VerifyEcho(echo_proxy_a, "the frobinators taste like frobinators");
VerifyEcho(echo_proxy_b, "beep bop boop");
VerifyEcho(echo_proxy_c, "zzzzzzzzzzzzzzzzzzzzzzzzzz");
WriteMessage(h, "exit");
});
CloseHandle(echo_factory_proxy);
CloseHandle(echo_proxy_a);
CloseHandle(echo_proxy_b);
CloseHandle(echo_proxy_c);
}
// Flaky on Android. See https://crbug.com/905620.
#if BUILDFLAG(IS_ANDROID)
#define MAYBE_ChannelPipesWithMultipleChildren \
DISABLED_ChannelPipesWithMultipleChildren
#else
#define MAYBE_ChannelPipesWithMultipleChildren ChannelPipesWithMultipleChildren
#endif
TEST_P(MultiprocessMessagePipeTestWithPeerSupport,
MAYBE_ChannelPipesWithMultipleChildren) {
RunTestClient("ChannelEchoClient", [&](MojoHandle a) {
RunTestClient("ChannelEchoClient", [&](MojoHandle b) {
VerifyEcho(a, "hello child 0");
VerifyEcho(b, "hello child 1");
WriteMessage(a, "exit");
WriteMessage(b, "exit");
});
});
}
// Reads and turns a pipe handle some number of times to create lots of
// transient proxies.
DEFINE_TEST_CLIENT_TEST_WITH_PIPE(PingPongPipeClient,
MultiprocessMessagePipeTest,
h) {
const size_t kNumBounces = 50;
MojoHandle p0, p1;
ReadMessageWithHandles(h, &p0, 1);
ReadMessageWithHandles(h, &p1, 1);
for (size_t i = 0; i < kNumBounces; ++i) {
WriteMessageWithHandles(h, "", &p1, 1);
ReadMessageWithHandles(h, &p1, 1);
}
WriteMessageWithHandles(h, "", &p0, 1);
WriteMessage(p1, "bye");
MojoClose(p1);
EXPECT_EQ("quit", ReadMessage(h));
}
TEST_P(MultiprocessMessagePipeTestWithPeerSupport, PingPongPipe) {
MojoHandle p0, p1;
CreateMessagePipe(&p0, &p1);
RunTestClient("PingPongPipeClient", [&](MojoHandle h) {
const size_t kNumBounces = 50;
WriteMessageWithHandles(h, "", &p0, 1);
WriteMessageWithHandles(h, "", &p1, 1);
for (size_t i = 0; i < kNumBounces; ++i) {
ReadMessageWithHandles(h, &p1, 1);
WriteMessageWithHandles(h, "", &p1, 1);
}
ReadMessageWithHandles(h, &p0, 1);
WriteMessage(h, "quit");
});
EXPECT_EQ("bye", ReadMessage(p0));
// We should still be able to observe peer closure from the other end.
EXPECT_EQ(MOJO_RESULT_OK, WaitForSignals(p0, MOJO_HANDLE_SIGNAL_PEER_CLOSED));
}
// Parses commands from the parent pipe and does whatever it's asked to do.
DEFINE_TEST_CLIENT_WITH_PIPE(CommandDrivenClient,
MultiprocessMessagePipeTest,
h) {
std::unordered_map<std::string, MojoHandle> named_pipes;
for (;;) {
MojoHandle p;
auto parts = base::SplitString(ReadMessageWithOptionalHandle(h, &p), ":",
base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
CHECK(!parts.empty());
std::string command = parts[0];
if (command == "take") {
// Take a pipe.
CHECK_EQ(parts.size(), 2u);
CHECK_NE(p, MOJO_HANDLE_INVALID);
named_pipes[parts[1]] = p;
WriteMessage(h, "ok");
} else if (command == "return") {
// Return a pipe.
CHECK_EQ(parts.size(), 2u);
CHECK_EQ(p, MOJO_HANDLE_INVALID);
p = named_pipes[parts[1]];
CHECK_NE(p, MOJO_HANDLE_INVALID);
named_pipes.erase(parts[1]);
WriteMessageWithHandles(h, "ok", &p, 1);
} else if (command == "say") {
// Say something to a named pipe.
CHECK_EQ(parts.size(), 3u);
CHECK_EQ(p, MOJO_HANDLE_INVALID);
p = named_pipes[parts[1]];
CHECK_NE(p, MOJO_HANDLE_INVALID);
CHECK(!parts[2].empty());
WriteMessage(p, parts[2]);
WriteMessage(h, "ok");
} else if (command == "hear") {
// Expect to read something from a named pipe.
CHECK_EQ(parts.size(), 3u);
CHECK_EQ(p, MOJO_HANDLE_INVALID);
p = named_pipes[parts[1]];
CHECK_NE(p, MOJO_HANDLE_INVALID);
CHECK(!parts[2].empty());
CHECK_EQ(parts[2], ReadMessage(p));
WriteMessage(h, "ok");
} else if (command == "pass") {
// Pass one named pipe over another named pipe.
CHECK_EQ(parts.size(), 3u);
CHECK_EQ(p, MOJO_HANDLE_INVALID);
p = named_pipes[parts[1]];
MojoHandle carrier = named_pipes[parts[2]];
CHECK_NE(p, MOJO_HANDLE_INVALID);
CHECK_NE(carrier, MOJO_HANDLE_INVALID);
named_pipes.erase(parts[1]);
WriteMessageWithHandles(carrier, "got a pipe for ya", &p, 1);
WriteMessage(h, "ok");
} else if (command == "catch") {
// Expect to receive one named pipe from another named pipe.
CHECK_EQ(parts.size(), 3u);
CHECK_EQ(p, MOJO_HANDLE_INVALID);
MojoHandle carrier = named_pipes[parts[2]];
CHECK_NE(carrier, MOJO_HANDLE_INVALID);
ReadMessageWithHandles(carrier, &p, 1);
CHECK_NE(p, MOJO_HANDLE_INVALID);
named_pipes[parts[1]] = p;
WriteMessage(h, "ok");
} else if (command == "exit") {
CHECK_EQ(parts.size(), 1u);