components/nacl/loader/nacl_ipc_adapter_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/nacl/loader/nacl_ipc_adapter.h"
   6
   7 #include <string.h>
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/message_loop/message_loop_proxy.h"
  12 #include "base/threading/platform_thread.h"
  13 #include "base/threading/simple_thread.h"
  14 #include "ipc/ipc_test_sink.h"
  15 #include "native_client/src/trusted/desc/nacl_desc_custom.h"
  16 #include "native_client/src/trusted/service_runtime/include/sys/fcntl.h"
  17 #include "ppapi/c/ppb_file_io.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 namespace {
  21
  22 class NaClIPCAdapterTest : public testing::Test {
  23  public:
  24   NaClIPCAdapterTest() {}
  25
  26   // testing::Test implementation.
  27   void SetUp() override {
  28     sink_ = new IPC::TestSink;
  29
  30     // Takes ownership of the sink_ pointer. Note we provide the current message
  31     // loop instead of using a real IO thread. This should work OK since we do
  32     // not need real IPC for the tests.
  33     adapter_ = new NaClIPCAdapter(scoped_ptr<IPC::Channel>(sink_),
  34                                   base::MessageLoopProxy::current().get());
  35   }
  36   void TearDown() override {
  37     sink_ = NULL;  // This pointer is actually owned by the IPCAdapter.
  38     adapter_ = NULL;
  39     // The adapter destructor has to post a task to destroy the Channel on the
  40     // IO thread. For the purposes of the test, we just need to make sure that
  41     // task gets run, or it will appear as a leak.
  42     message_loop_.RunUntilIdle();
  43   }
  44
  45  protected:
  46   int BlockingReceive(void* buf, size_t buf_size) {
  47     NaClImcMsgIoVec iov = {buf, buf_size};
  48     NaClImcTypedMsgHdr msg = {&iov, 1};
  49     return adapter_->BlockingReceive(&msg);
  50   }
  51
  52   int Send(void* buf, size_t buf_size) {
  53     NaClImcMsgIoVec iov = {buf, buf_size};
  54     NaClImcTypedMsgHdr msg = {&iov, 1};
  55     return adapter_->Send(&msg);
  56   }
  57
  58   base::MessageLoop message_loop_;
  59
  60   scoped_refptr<NaClIPCAdapter> adapter_;
  61
  62   // Messages sent from nacl to the adapter end up here. Note that we create
  63   // this pointer and pass ownership of it to the IPC adapter, who will keep
  64   // it alive as long as the adapter is alive. This means that when the
  65   // adapter goes away, this pointer will become invalid.
  66   //
  67   // In real life the adapter needs to take ownership so the channel can be
  68   // destroyed on the right thread.
  69   IPC::TestSink* sink_;
  70 };
  71
  72 }  // namespace
  73
  74 // Tests a simple message getting rewritten sent from native code to NaCl.
  75 TEST_F(NaClIPCAdapterTest, SimpleReceiveRewriting) {
  76   int routing_id = 0x89898989;
  77   uint32 type = 0x55555555;
  78   IPC::Message input(routing_id, type, IPC::Message::PRIORITY_NORMAL);
  79   uint32 flags = input.flags();
  80
  81   int value = 0x12345678;
  82   input.WriteInt(value);
  83   adapter_->OnMessageReceived(input);
  84
  85   // Buffer just need to be big enough for our message with one int.
  86   const int kBufSize = 64;
  87   char buf[kBufSize];
  88
  89   int bytes_read = BlockingReceive(buf, kBufSize);
  90   EXPECT_EQ(sizeof(NaClIPCAdapter::NaClMessageHeader) + sizeof(int),
  91             static_cast<size_t>(bytes_read));
  92
  93   const NaClIPCAdapter::NaClMessageHeader* output_header =
  94       reinterpret_cast<const NaClIPCAdapter::NaClMessageHeader*>(buf);
  95   EXPECT_EQ(sizeof(int), output_header->payload_size);
  96   EXPECT_EQ(routing_id, output_header->routing);
  97   EXPECT_EQ(type, output_header->type);
  98   EXPECT_EQ(flags, output_header->flags);
  99   EXPECT_EQ(0u, output_header->num_fds);
 100   EXPECT_EQ(0u, output_header->pad);
 101
 102   // Validate the payload.
 103   EXPECT_EQ(value,
 104             *reinterpret_cast<const int*>(&buf[
 105                 sizeof(NaClIPCAdapter::NaClMessageHeader)]));
 106 }
 107
 108 // Tests a simple message getting rewritten sent from NaCl to native code.
 109 TEST_F(NaClIPCAdapterTest, SendRewriting) {
 110   int routing_id = 0x89898989;
 111   uint32 type = 0x55555555;
 112   int value = 0x12345678;
 113
 114   // Send a message with one int inside it.
 115   const int buf_size = sizeof(NaClIPCAdapter::NaClMessageHeader) + sizeof(int);
 116   char buf[buf_size] = {0};
 117
 118   NaClIPCAdapter::NaClMessageHeader* header =
 119       reinterpret_cast<NaClIPCAdapter::NaClMessageHeader*>(buf);
 120   header->payload_size = sizeof(int);
 121   header->routing = routing_id;
 122   header->type = type;
 123   header->flags = 0;
 124   header->num_fds = 0;
 125   *reinterpret_cast<int*>(
 126       &buf[sizeof(NaClIPCAdapter::NaClMessageHeader)]) = value;
 127
 128   int result = Send(buf, buf_size);
 129   EXPECT_EQ(buf_size, result);
 130
 131   // Check that the message came out the other end in the test sink
 132   // (messages are posted, so we have to pump).
 133   message_loop_.RunUntilIdle();
 134   ASSERT_EQ(1u, sink_->message_count());
 135   const IPC::Message* msg = sink_->GetMessageAt(0);
 136
 137   EXPECT_EQ(sizeof(int), msg->payload_size());
 138   EXPECT_EQ(header->routing, msg->routing_id());
 139   EXPECT_EQ(header->type, msg->type());
 140
 141   // Now test the partial send case. We should be able to break the message
 142   // into two parts and it should still work.
 143   sink_->ClearMessages();
 144   int first_chunk_size = 7;
 145   result = Send(buf, first_chunk_size);
 146   EXPECT_EQ(first_chunk_size, result);
 147
 148   // First partial send should not have made any messages.
 149   message_loop_.RunUntilIdle();
 150   ASSERT_EQ(0u, sink_->message_count());
 151
 152   // Second partial send should do the same.
 153   int second_chunk_size = 2;
 154   result = Send(&buf[first_chunk_size], second_chunk_size);
 155   EXPECT_EQ(second_chunk_size, result);
 156   message_loop_.RunUntilIdle();
 157   ASSERT_EQ(0u, sink_->message_count());
 158
 159   // Send the rest of the message in a third chunk.
 160   int third_chunk_size = buf_size - first_chunk_size - second_chunk_size;
 161   result = Send(&buf[first_chunk_size + second_chunk_size],
 162                           third_chunk_size);
 163   EXPECT_EQ(third_chunk_size, result);
 164
 165   // Last send should have generated one message.
 166   message_loop_.RunUntilIdle();
 167   ASSERT_EQ(1u, sink_->message_count());
 168   msg = sink_->GetMessageAt(0);
 169   EXPECT_EQ(sizeof(int), msg->payload_size());
 170   EXPECT_EQ(header->routing, msg->routing_id());
 171   EXPECT_EQ(header->type, msg->type());
 172 }
 173
 174 // Tests when a buffer is too small to receive the entire message.
 175 TEST_F(NaClIPCAdapterTest, PartialReceive) {
 176   int routing_id_1 = 0x89898989;
 177   uint32 type_1 = 0x55555555;
 178   IPC::Message input_1(routing_id_1, type_1, IPC::Message::PRIORITY_NORMAL);
 179   int value_1 = 0x12121212;
 180   input_1.WriteInt(value_1);
 181   adapter_->OnMessageReceived(input_1);
 182
 183   int routing_id_2 = 0x90909090;
 184   uint32 type_2 = 0x66666666;
 185   IPC::Message input_2(routing_id_2, type_2, IPC::Message::PRIORITY_NORMAL);
 186   int value_2 = 0x23232323;
 187   input_2.WriteInt(value_2);
 188   adapter_->OnMessageReceived(input_2);
 189
 190   const int kBufSize = 64;
 191   char buf[kBufSize];
 192
 193   // Read part of the first message.
 194   int bytes_requested = 7;
 195   int bytes_read = BlockingReceive(buf, bytes_requested);
 196   ASSERT_EQ(bytes_requested, bytes_read);
 197
 198   // Read the rest, this should give us the rest of the first message only.
 199   bytes_read += BlockingReceive(&buf[bytes_requested],
 200                                         kBufSize - bytes_requested);
 201   EXPECT_EQ(sizeof(NaClIPCAdapter::NaClMessageHeader) + sizeof(int),
 202             static_cast<size_t>(bytes_read));
 203
 204   // Make sure we got the right message.
 205   const NaClIPCAdapter::NaClMessageHeader* output_header =
 206       reinterpret_cast<const NaClIPCAdapter::NaClMessageHeader*>(buf);
 207   EXPECT_EQ(sizeof(int), output_header->payload_size);
 208   EXPECT_EQ(routing_id_1, output_header->routing);
 209   EXPECT_EQ(type_1, output_header->type);
 210
 211   // Read the second message to make sure we went on to it.
 212   bytes_read = BlockingReceive(buf, kBufSize);
 213   EXPECT_EQ(sizeof(NaClIPCAdapter::NaClMessageHeader) + sizeof(int),
 214             static_cast<size_t>(bytes_read));
 215   output_header =
 216       reinterpret_cast<const NaClIPCAdapter::NaClMessageHeader*>(buf);
 217   EXPECT_EQ(sizeof(int), output_header->payload_size);
 218   EXPECT_EQ(routing_id_2, output_header->routing);
 219   EXPECT_EQ(type_2, output_header->type);
 220 }
 221
 222 // Tests sending messages that are too large. We test sends that are too
 223 // small implicitly here and in the success case because in that case it
 224 // succeeds and buffers the data.
 225 TEST_F(NaClIPCAdapterTest, SendOverflow) {
 226   int routing_id = 0x89898989;
 227   uint32 type = 0x55555555;
 228   int value = 0x12345678;
 229
 230   // Make a message with one int inside it. Reserve some extra space so
 231   // we can test what happens when we send too much data.
 232   const int buf_size = sizeof(NaClIPCAdapter::NaClMessageHeader) + sizeof(int);
 233   const int big_buf_size = buf_size + 4;
 234   char buf[big_buf_size] = {0};
 235
 236   NaClIPCAdapter::NaClMessageHeader* header =
 237       reinterpret_cast<NaClIPCAdapter::NaClMessageHeader*>(buf);
 238   header->payload_size = sizeof(int);
 239   header->routing = routing_id;
 240   header->type = type;
 241   header->flags = 0;
 242   header->num_fds = 0;
 243   *reinterpret_cast<int*>(
 244       &buf[sizeof(NaClIPCAdapter::NaClMessageHeader)]) = value;
 245
 246   // Send too much data and make sure that the send fails.
 247   int result = Send(buf, big_buf_size);
 248   EXPECT_EQ(-1, result);
 249   message_loop_.RunUntilIdle();
 250   ASSERT_EQ(0u, sink_->message_count());
 251
 252   // Send too much data in two chunks and make sure that the send fails.
 253   int first_chunk_size = 7;
 254   result = Send(buf, first_chunk_size);
 255   EXPECT_EQ(first_chunk_size, result);
 256
 257   // First partial send should not have made any messages.
 258   message_loop_.RunUntilIdle();
 259   ASSERT_EQ(0u, sink_->message_count());
 260
 261   int second_chunk_size = big_buf_size - first_chunk_size;
 262   result = Send(&buf[first_chunk_size], second_chunk_size);
 263   EXPECT_EQ(-1, result);
 264   message_loop_.RunUntilIdle();
 265   ASSERT_EQ(0u, sink_->message_count());
 266 }
 267
 268 // Tests that when the IPC channel reports an error, that waiting reads are
 269 // unblocked and return a -1 error code.
 270 TEST_F(NaClIPCAdapterTest, ReadWithChannelError) {
 271   // Have a background thread that waits a bit and calls the channel error
 272   // handler. This should wake up any waiting threads and immediately return
 273   // -1. There is an inherent race condition in that we can't be sure if the
 274   // other thread is actually waiting when this happens. This is OK, since the
 275   // behavior (which we also explicitly test later) is to return -1 if the
 276   // channel has already had an error when you start waiting.
 277   class MyThread : public base::SimpleThread {
 278    public:
 279     explicit MyThread(NaClIPCAdapter* adapter)
 280         : SimpleThread("NaClIPCAdapterThread"),
 281           adapter_(adapter) {}
 282     void Run() override {
 283       base::PlatformThread::Sleep(base::TimeDelta::FromSeconds(1));
 284       adapter_->OnChannelError();
 285     }
 286    private:
 287     scoped_refptr<NaClIPCAdapter> adapter_;
 288   };
 289   MyThread thread(adapter_.get());
 290
 291   // IMPORTANT: do not return early from here down (including ASSERT_*) because
 292   // the thread needs to joined or it will assert.
 293   thread.Start();
 294
 295   // Request data. This will normally (modulo races) block until data is
 296   // received or there is an error, and the thread above will wake us up
 297   // after 1s.
 298   const int kBufSize = 64;
 299   char buf[kBufSize];
 300   int result = BlockingReceive(buf, kBufSize);
 301   EXPECT_EQ(-1, result);
 302
 303   // Test the "previously had an error" case. BlockingReceive should return
 304   // immediately if there was an error.
 305   result = BlockingReceive(buf, kBufSize);
 306   EXPECT_EQ(-1, result);
 307
 308   thread.Join();
 309 }
 310
 311 // Tests that TranslatePepperFileOpenFlags translates pepper read/write open
 312 // flags into NaCl open flags correctly.
 313 TEST_F(NaClIPCAdapterTest, TranslatePepperFileReadWriteOpenFlags) {
 314   EXPECT_EQ(NACL_ABI_O_RDONLY,
 315       TranslatePepperFileReadWriteOpenFlagsForTesting(PP_FILEOPENFLAG_READ));
 316   EXPECT_EQ(NACL_ABI_O_WRONLY,
 317       TranslatePepperFileReadWriteOpenFlagsForTesting(PP_FILEOPENFLAG_WRITE));
 318   EXPECT_EQ(NACL_ABI_O_WRONLY | NACL_ABI_O_APPEND,
 319       TranslatePepperFileReadWriteOpenFlagsForTesting(
 320           PP_FILEOPENFLAG_APPEND));
 321   EXPECT_EQ(NACL_ABI_O_RDWR,
 322       TranslatePepperFileReadWriteOpenFlagsForTesting(
 323           PP_FILEOPENFLAG_READ | PP_FILEOPENFLAG_WRITE));
 324   EXPECT_EQ(NACL_ABI_O_WRONLY | NACL_ABI_O_APPEND,
 325       TranslatePepperFileReadWriteOpenFlagsForTesting(
 326           PP_FILEOPENFLAG_APPEND));
 327   EXPECT_EQ(NACL_ABI_O_RDWR | NACL_ABI_O_APPEND,
 328       TranslatePepperFileReadWriteOpenFlagsForTesting(
 329           PP_FILEOPENFLAG_READ | PP_FILEOPENFLAG_APPEND));
 330
 331   // Flags other than PP_FILEOPENFLAG_READ, PP_FILEOPENFLAG_WRITE, and
 332   // PP_FILEOPENFLAG_APPEND are discarded.
 333   EXPECT_EQ(NACL_ABI_O_WRONLY,
 334       TranslatePepperFileReadWriteOpenFlagsForTesting(
 335           PP_FILEOPENFLAG_WRITE | PP_FILEOPENFLAG_CREATE));
 336   EXPECT_EQ(NACL_ABI_O_WRONLY,
 337       TranslatePepperFileReadWriteOpenFlagsForTesting(
 338           PP_FILEOPENFLAG_WRITE | PP_FILEOPENFLAG_TRUNCATE));
 339   EXPECT_EQ(NACL_ABI_O_WRONLY,
 340       TranslatePepperFileReadWriteOpenFlagsForTesting(
 341           PP_FILEOPENFLAG_WRITE | PP_FILEOPENFLAG_EXCLUSIVE));
 342
 343   // If none of PP_FILEOPENFLAG_READ, PP_FILEOPENFLAG_WRITE, and
 344   // PP_FILEOPENFLAG_APPEND are set, the result should fall back to
 345   // NACL_ABI_O_READONLY.
 346   EXPECT_EQ(NACL_ABI_O_RDONLY,
 347       TranslatePepperFileReadWriteOpenFlagsForTesting(0));
 348   EXPECT_EQ(NACL_ABI_O_RDONLY,
 349       TranslatePepperFileReadWriteOpenFlagsForTesting(
 350           PP_FILEOPENFLAG_CREATE));
 351   EXPECT_EQ(NACL_ABI_O_RDONLY,
 352       TranslatePepperFileReadWriteOpenFlagsForTesting(
 353           PP_FILEOPENFLAG_TRUNCATE));
 354   EXPECT_EQ(NACL_ABI_O_RDONLY,
 355       TranslatePepperFileReadWriteOpenFlagsForTesting(
 356           PP_FILEOPENFLAG_EXCLUSIVE));
 357 }