The Tor Browser: security/sandbox/win/src/ipc_unittest.cc@b8a032363ba2 (annotated)

security/sandbox/win/src/ipc_unittest.cc@b8a032363ba2 (annotated)

security/sandbox/win/src/ipc_unittest.cc

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "sandbox/win/src/crosscall_client.h"
 #include "sandbox/win/src/crosscall_server.h"
 #include "sandbox/win/src/sharedmem_ipc_client.h"
 #include "sandbox/win/src/sharedmem_ipc_server.h"
 #include "testing/gtest/include/gtest/gtest.h"
 namespace sandbox {
 // Helper function to make the fake shared memory with some
 // basic elements initialized.
 IPCControl* MakeChannels(size_t channel_size, size_t total_shared_size,
                          size_t* base_start) {
   // Allocate memory
   char* mem = new char[total_shared_size];
   memset(mem, 0, total_shared_size);
   // Calculate how many channels we can fit in the shared memory.
   total_shared_size -= offsetof(IPCControl, channels);
   size_t channel_count =
     total_shared_size / (sizeof(ChannelControl) + channel_size);
   // Calculate the start of the first channel.
   *base_start = (sizeof(ChannelControl)* channel_count) +
     offsetof(IPCControl, channels);
   // Setup client structure.
   IPCControl* client_control = reinterpret_cast<IPCControl*>(mem);
   client_control->channels_count = channel_count;
   return client_control;
 }
 enum TestFixMode {
   FIX_NO_EVENTS,
   FIX_PONG_READY,
   FIX_PONG_NOT_READY
 };
 void FixChannels(IPCControl* client_control, size_t base_start,
                  size_t channel_size, TestFixMode mode) {
   for (size_t ix = 0; ix != client_control->channels_count; ++ix) {
     ChannelControl& channel = client_control->channels[ix];
     channel.channel_base = base_start;
     channel.state = kFreeChannel;
     if (mode != FIX_NO_EVENTS) {
       BOOL signaled = (FIX_PONG_READY == mode)? TRUE : FALSE;
       channel.ping_event = ::CreateEventW(NULL, FALSE, FALSE, NULL);
       channel.pong_event = ::CreateEventW(NULL, FALSE, signaled, NULL);
     }
     base_start += channel_size;
   }
 }
 void CloseChannelEvents(IPCControl* client_control) {
   for (size_t ix = 0; ix != client_control->channels_count; ++ix) {
     ChannelControl& channel = client_control->channels[ix];
     ::CloseHandle(channel.ping_event);
     ::CloseHandle(channel.pong_event);
   }
 }
 TEST(IPCTest, ChannelMaker) {
   // Test that our testing rig is computing offsets properly. We should have
   // 5 channnels and the offset to the first channel is 108 bytes in 32 bits
   // and 216 in 64 bits.
   size_t channel_start = 0;
   IPCControl* client_control = MakeChannels(12 * 64, 4096, &channel_start);
   ASSERT_TRUE(NULL != client_control);
   EXPECT_EQ(5, client_control->channels_count);
 #if defined(_WIN64)
   EXPECT_EQ(216, channel_start);
 #else
   EXPECT_EQ(108, channel_start);
 #endif
   delete[] reinterpret_cast<char*>(client_control);
 }
 TEST(IPCTest, ClientLockUnlock) {
   // Make 7 channels of kIPCChannelSize (1kb) each. Test that we lock and
   // unlock channels properly.
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(kIPCChannelSize, 4096 * 2, &base_start);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_NO_EVENTS);
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   // Test that we lock the first 3 channels in sequence.
   void* buff0 = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[0].channel_base == buff0);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   void* buff1 = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[1].channel_base == buff1);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   void* buff2 = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[2].channel_base == buff2);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[1].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   // Test that we unlock and re-lock the right channel.
   client.FreeBuffer(buff1);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[1].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   void* buff2b = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[1].channel_base == buff2b);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[1].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   client.FreeBuffer(buff0);
   EXPECT_EQ(kFreeChannel, client_control->channels[0].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[1].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[2].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[3].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[4].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[5].state);
   delete[] reinterpret_cast<char*>(client_control);
 }
 TEST(IPCTest, CrossCallStrPacking) {
   // This test tries the CrossCall object with null and non-null string
   // combination of parameters, integer types and verifies that the unpacker
   // can read them properly.
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(kIPCChannelSize, 4096 * 4, &base_start);
   client_control->server_alive = HANDLE(1);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_PONG_READY);
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   CrossCallReturn answer;
   uint32 tag1 = 666;
   const wchar_t text[] = L"98765 - 43210";
   std::wstring copied_text;
   CrossCallParamsEx* actual_params;
   CrossCall(client, tag1, text, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(1, actual_params->GetParamsCount());
   EXPECT_EQ(tag1, actual_params->GetTag());
   EXPECT_TRUE(actual_params->GetParameterStr(0, &copied_text));
   EXPECT_STREQ(text, copied_text.c_str());
   // Check with an empty string.
   uint32 tag2 = 777;
   const wchar_t* null_text = NULL;
   CrossCall(client, tag2, null_text, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(1, actual_params->GetParamsCount());
   EXPECT_EQ(tag2, actual_params->GetTag());
   uint32 param_size = 1;
   ArgType type = INVALID_TYPE;
   void* param_addr = actual_params->GetRawParameter(0, &param_size, &type);
   EXPECT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, param_size);
   EXPECT_EQ(WCHAR_TYPE, type);
   EXPECT_TRUE(actual_params->GetParameterStr(0, &copied_text));
   uint32 tag3 = 888;
   param_size = 1;
   copied_text.clear();
   // Check with an empty string and a non-empty string.
   CrossCall(client, tag3, null_text, text, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(2, actual_params->GetParamsCount());
   EXPECT_EQ(tag3, actual_params->GetTag());
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(0, &param_size, &type);
   EXPECT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, param_size);
   EXPECT_EQ(WCHAR_TYPE, type);
   EXPECT_TRUE(actual_params->GetParameterStr(0, &copied_text));
   EXPECT_TRUE(actual_params->GetParameterStr(1, &copied_text));
   EXPECT_STREQ(text, copied_text.c_str());
   param_size = 1;
   std::wstring copied_text_p0, copied_text_p2;
   const wchar_t text2[] = L"AeFG";
   CrossCall(client, tag1, text2, null_text, text, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(3, actual_params->GetParamsCount());
   EXPECT_EQ(tag1, actual_params->GetTag());
   EXPECT_TRUE(actual_params->GetParameterStr(0, &copied_text_p0));
   EXPECT_STREQ(text2, copied_text_p0.c_str());
   EXPECT_TRUE(actual_params->GetParameterStr(2, &copied_text_p2));
   EXPECT_STREQ(text, copied_text_p2.c_str());
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(1, &param_size, &type);
   EXPECT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, param_size);
   EXPECT_EQ(WCHAR_TYPE, type);
   CloseChannelEvents(client_control);
   delete[] reinterpret_cast<char*>(client_control);
 }
 TEST(IPCTest, CrossCallIntPacking) {
   // Check handling for regular 32 bit integers used in Windows.
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(kIPCChannelSize, 4096 * 4, &base_start);
   client_control->server_alive = HANDLE(1);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_PONG_READY);
   uint32 tag1 = 999;
   uint32 tag2 = 111;
   const wchar_t text[] = L"godzilla";
   CrossCallParamsEx* actual_params;
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   CrossCallReturn answer;
   DWORD dw = 0xE6578;
   CrossCall(client, tag2, dw, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(1, actual_params->GetParamsCount());
   EXPECT_EQ(tag2, actual_params->GetTag());
   ArgType type = INVALID_TYPE;
   uint32 param_size = 1;
   void* param_addr = actual_params->GetRawParameter(0, &param_size, &type);
   ASSERT_EQ(sizeof(dw), param_size);
   EXPECT_EQ(ULONG_TYPE, type);
   ASSERT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, memcmp(&dw, param_addr, param_size));
   // Check handling for windows HANDLES.
   HANDLE h = HANDLE(0x70000500);
   CrossCall(client, tag1, text, h, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(2, actual_params->GetParamsCount());
   EXPECT_EQ(tag1, actual_params->GetTag());
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(1, &param_size, &type);
   ASSERT_EQ(sizeof(h), param_size);
   EXPECT_EQ(VOIDPTR_TYPE, type);
   ASSERT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, memcmp(&h, param_addr, param_size));
   // Check combination of 32 and 64 bits.
   CrossCall(client, tag2, h, dw, h, &answer);
   actual_params = reinterpret_cast<CrossCallParamsEx*>(client.GetBuffer());
   EXPECT_EQ(3, actual_params->GetParamsCount());
   EXPECT_EQ(tag2, actual_params->GetTag());
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(0, &param_size, &type);
   ASSERT_EQ(sizeof(h), param_size);
   EXPECT_EQ(VOIDPTR_TYPE, type);
   ASSERT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, memcmp(&h, param_addr, param_size));
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(1, &param_size, &type);
   ASSERT_EQ(sizeof(dw), param_size);
   EXPECT_EQ(ULONG_TYPE, type);
   ASSERT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, memcmp(&dw, param_addr, param_size));
   type = INVALID_TYPE;
   param_addr = actual_params->GetRawParameter(2, &param_size, &type);
   ASSERT_EQ(sizeof(h), param_size);
   EXPECT_EQ(VOIDPTR_TYPE, type);
   ASSERT_TRUE(NULL != param_addr);
   EXPECT_EQ(0, memcmp(&h, param_addr, param_size));
   CloseChannelEvents(client_control);
   delete[] reinterpret_cast<char*>(client_control);
 }
 TEST(IPCTest, CrossCallValidation) {
   // First a sanity test with a well formed parameter object.
   unsigned long value = 124816;
   const uint32 kTag = 33;
   const uint32 kBufferSize = 256;
   ActualCallParams<1, kBufferSize> params_1(kTag);
   params_1.CopyParamIn(0, &value, sizeof(value), false, ULONG_TYPE);
   void* buffer = const_cast<void*>(params_1.GetBuffer());
   uint32 out_size = 0;
   CrossCallParamsEx* ccp = 0;
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, params_1.GetSize(),
                                             &out_size);
   ASSERT_TRUE(NULL != ccp);
   EXPECT_TRUE(ccp->GetBuffer() != buffer);
   EXPECT_EQ(kTag, ccp->GetTag());
   EXPECT_EQ(1, ccp->GetParamsCount());
   delete[] (reinterpret_cast<char*>(ccp));
 #if defined(NDEBUG)
   // Test hat we handle integer overflow on the number of params
   // correctly. We use a test-only ctor for ActualCallParams that
   // allows to create malformed cross-call buffers.
   const int32 kPtrDiffSz = sizeof(ptrdiff_t);
   for (int32 ix = -1; ix != 3; ++ix) {
     uint32 fake_num_params = (kuint32max / kPtrDiffSz) + ix;
     ActualCallParams<1, kBufferSize> params_2(kTag, fake_num_params);
     params_2.CopyParamIn(0, &value, sizeof(value), false, ULONG_TYPE);
     buffer = const_cast<void*>(params_2.GetBuffer());
     EXPECT_TRUE(NULL != buffer);
     ccp = CrossCallParamsEx::CreateFromBuffer(buffer, params_1.GetSize(),
                                               &out_size);
     // If the buffer is malformed the return is NULL.
     EXPECT_TRUE(NULL == ccp);
   }
 #endif  // defined(NDEBUG)
   ActualCallParams<1, kBufferSize> params_3(kTag, 1);
   params_3.CopyParamIn(0, &value, sizeof(value), false, ULONG_TYPE);
   buffer = const_cast<void*>(params_3.GetBuffer());
   EXPECT_TRUE(NULL != buffer);
   uint32 correct_size = params_3.OverrideSize(1);
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, kBufferSize, &out_size);
   EXPECT_TRUE(NULL == ccp);
   // The correct_size is 8 bytes aligned.
   params_3.OverrideSize(correct_size - 7);
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, kBufferSize, &out_size);
   EXPECT_TRUE(NULL == ccp);
   params_3.OverrideSize(correct_size);
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, kBufferSize, &out_size);
   EXPECT_TRUE(NULL != ccp);
   // Make sure that two parameters work as expected.
   ActualCallParams<2, kBufferSize> params_4(kTag, 2);
   params_4.CopyParamIn(0, &value, sizeof(value), false, ULONG_TYPE);
   params_4.CopyParamIn(1, buffer, sizeof(buffer), false, VOIDPTR_TYPE);
   buffer = const_cast<void*>(params_4.GetBuffer());
   EXPECT_TRUE(NULL != buffer);
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, kBufferSize, &out_size);
   EXPECT_TRUE(NULL != ccp);
 #if defined(_WIN64)
   correct_size = params_4.OverrideSize(1);
   params_4.OverrideSize(correct_size - 1);
   ccp = CrossCallParamsEx::CreateFromBuffer(buffer, kBufferSize, &out_size);
   EXPECT_TRUE(NULL == ccp);
 #endif
 }
 // This structure is passed to the mock server threads to simulate
 // the server side IPC so it has the required kernel objects.
 struct ServerEvents {
   HANDLE ping;
   HANDLE pong;
   volatile LONG* state;
   HANDLE mutex;
 };
 // This is the server thread that quicky answers an IPC and exits.
 DWORD WINAPI QuickResponseServer(PVOID param) {
   ServerEvents* events = reinterpret_cast<ServerEvents*>(param);
   DWORD wait_result = 0;
   wait_result = ::WaitForSingleObject(events->ping, INFINITE);
   ::InterlockedExchange(events->state, kAckChannel);
   ::SetEvent(events->pong);
   return wait_result;
 }
 class CrossCallParamsMock : public CrossCallParams {
  public:
   CrossCallParamsMock(uint32 tag, uint32 params_count)
       :  CrossCallParams(tag, params_count) {
   }
  private:
   void* params[4];
 };
 void FakeOkAnswerInChannel(void* channel) {
   CrossCallReturn* answer = reinterpret_cast<CrossCallReturn*>(channel);
   answer->call_outcome = SBOX_ALL_OK;
 }
 // Create two threads that will quickly answer IPCs; the first one
 // using channel 1 (channel 0 is busy) and one using channel 0. No time-out
 // should occur.
 TEST(IPCTest, ClientFastServer) {
   const size_t channel_size = kIPCChannelSize;
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(channel_size, 4096 * 2, &base_start);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_PONG_NOT_READY);
   client_control->server_alive = ::CreateMutex(NULL, FALSE, NULL);
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   ServerEvents events = {0};
   events.ping = client_control->channels[1].ping_event;
   events.pong = client_control->channels[1].pong_event;
   events.state = &client_control->channels[1].state;
   HANDLE t1 = ::CreateThread(NULL, 0, QuickResponseServer, &events, 0, NULL);
   ASSERT_TRUE(NULL != t1);
   ::CloseHandle(t1);
   void* buff0 = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[0].channel_base == buff0);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   void* buff1 = client.GetBuffer();
   EXPECT_TRUE(mem + client_control->channels[1].channel_base == buff1);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kBusyChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   EXPECT_EQ(0, client_control->channels[1].ipc_tag);
   uint32 tag = 7654;
   CrossCallReturn answer;
   CrossCallParamsMock* params1 = new(buff1) CrossCallParamsMock(tag, 1);
   FakeOkAnswerInChannel(buff1);
   ResultCode result = client.DoCall(params1, &answer);
   if (SBOX_ERROR_CHANNEL_ERROR != result)
     client.FreeBuffer(buff1);
   EXPECT_TRUE(SBOX_ALL_OK == result);
   EXPECT_EQ(tag, client_control->channels[1].ipc_tag);
   EXPECT_EQ(kBusyChannel, client_control->channels[0].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   HANDLE t2 = ::CreateThread(NULL, 0, QuickResponseServer, &events, 0, NULL);
   ASSERT_TRUE(NULL != t2);
   ::CloseHandle(t2);
   client.FreeBuffer(buff0);
   events.ping = client_control->channels[0].ping_event;
   events.pong = client_control->channels[0].pong_event;
   events.state = &client_control->channels[0].state;
   tag = 4567;
   CrossCallParamsMock* params2 = new(buff0) CrossCallParamsMock(tag, 1);
   FakeOkAnswerInChannel(buff0);
   result = client.DoCall(params2, &answer);
   if (SBOX_ERROR_CHANNEL_ERROR != result)
     client.FreeBuffer(buff0);
   EXPECT_TRUE(SBOX_ALL_OK == result);
   EXPECT_EQ(tag, client_control->channels[0].ipc_tag);
   EXPECT_EQ(kFreeChannel, client_control->channels[0].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[1].state);
   EXPECT_EQ(kFreeChannel, client_control->channels[2].state);
   CloseChannelEvents(client_control);
   ::CloseHandle(client_control->server_alive);
   delete[] reinterpret_cast<char*>(client_control);
 }
 // This is the server thread that very slowly answers an IPC and exits. Note
 // that the pong event needs to be signaled twice.
 DWORD WINAPI SlowResponseServer(PVOID param) {
   ServerEvents* events = reinterpret_cast<ServerEvents*>(param);
   DWORD wait_result = 0;
   wait_result = ::WaitForSingleObject(events->ping, INFINITE);
   ::Sleep(kIPCWaitTimeOut1 + kIPCWaitTimeOut2 + 200);
   ::InterlockedExchange(events->state, kAckChannel);
   ::SetEvent(events->pong);
   return wait_result;
 }
 // This thread's job is to keep the mutex locked.
 DWORD WINAPI MainServerThread(PVOID param) {
   ServerEvents* events = reinterpret_cast<ServerEvents*>(param);
   DWORD wait_result = 0;
   wait_result = ::WaitForSingleObject(events->mutex, INFINITE);
   Sleep(kIPCWaitTimeOut1 * 20);
   return wait_result;
 }
 // Creates a server thread that answers the IPC so slow that is guaranteed to
 // trigger the time-out code path in the client. A second thread is created
 // to hold locked the server_alive mutex: this signals the client that the
 // server is not dead and it retries the wait.
 TEST(IPCTest, ClientSlowServer) {
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(kIPCChannelSize, 4096*2, &base_start);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_PONG_NOT_READY);
   client_control->server_alive = ::CreateMutex(NULL, FALSE, NULL);
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   ServerEvents events = {0};
   events.ping = client_control->channels[0].ping_event;
   events.pong = client_control->channels[0].pong_event;
   events.state = &client_control->channels[0].state;
   HANDLE t1 = ::CreateThread(NULL, 0, SlowResponseServer, &events, 0, NULL);
   ASSERT_TRUE(NULL != t1);
   ::CloseHandle(t1);
   ServerEvents events2 = {0};
   events2.pong = events.pong;
   events2.mutex = client_control->server_alive;
   HANDLE t2 = ::CreateThread(NULL, 0, MainServerThread, &events2, 0, NULL);
   ASSERT_TRUE(NULL != t2);
   ::CloseHandle(t2);
   ::Sleep(1);
   void* buff0 = client.GetBuffer();
   uint32 tag = 4321;
   CrossCallReturn answer;
   CrossCallParamsMock* params1 = new(buff0) CrossCallParamsMock(tag, 1);
   FakeOkAnswerInChannel(buff0);
   ResultCode result = client.DoCall(params1, &answer);
   if (SBOX_ERROR_CHANNEL_ERROR != result)
     client.FreeBuffer(buff0);
   EXPECT_TRUE(SBOX_ALL_OK == result);
   EXPECT_EQ(tag, client_control->channels[0].ipc_tag);
   EXPECT_EQ(kFreeChannel, client_control->channels[0].state);
   CloseChannelEvents(client_control);
   ::CloseHandle(client_control->server_alive);
   delete[] reinterpret_cast<char*>(client_control);
 }
 // This test-only IPC dispatcher has two handlers with the same signature
 // but only CallOneHandler should be used.
 class UnitTestIPCDispatcher : public Dispatcher {
  public:
   enum {
     CALL_ONE_TAG = 78,
     CALL_TWO_TAG = 87
   };
   UnitTestIPCDispatcher();
   ~UnitTestIPCDispatcher() {};
   virtual bool SetupService(InterceptionManager* manager, int service) {
     return true;
   }
  private:
   bool CallOneHandler(IPCInfo* ipc, HANDLE p1, DWORD p2) {
     ipc->return_info.extended[0].handle = p1;
     ipc->return_info.extended[1].unsigned_int = p2;
     return true;
   }
   bool CallTwoHandler(IPCInfo* ipc, HANDLE p1, DWORD p2) {
     return true;
   }
 };
 UnitTestIPCDispatcher::UnitTestIPCDispatcher() {
   static const IPCCall call_one = {
     {CALL_ONE_TAG, VOIDPTR_TYPE, ULONG_TYPE},
     reinterpret_cast<CallbackGeneric>(
         &UnitTestIPCDispatcher::CallOneHandler)
   };
   static const IPCCall call_two = {
     {CALL_TWO_TAG, VOIDPTR_TYPE, ULONG_TYPE},
     reinterpret_cast<CallbackGeneric>(
         &UnitTestIPCDispatcher::CallTwoHandler)
   };
   ipc_calls_.push_back(call_one);
   ipc_calls_.push_back(call_two);
 }
 // This test does most of the shared memory IPC client-server roundtrip
 // and tests the packing, unpacking and call dispatching.
 TEST(IPCTest, SharedMemServerTests) {
   size_t base_start = 0;
   IPCControl* client_control =
       MakeChannels(kIPCChannelSize, 4096, &base_start);
   client_control->server_alive = HANDLE(1);
   FixChannels(client_control, base_start, kIPCChannelSize, FIX_PONG_READY);
   char* mem = reinterpret_cast<char*>(client_control);
   SharedMemIPCClient client(mem);
   CrossCallReturn answer;
   HANDLE bar = HANDLE(191919);
   DWORD foo = 6767676;
   CrossCall(client, UnitTestIPCDispatcher::CALL_ONE_TAG, bar, foo, &answer);
   void* buff = client.GetBuffer();
   ASSERT_TRUE(NULL != buff);
   UnitTestIPCDispatcher dispatcher;
   // Since we are directly calling InvokeCallback, most of this structure
   // can be set to NULL.
   sandbox::SharedMemIPCServer::ServerControl srv_control = {
       NULL, NULL, kIPCChannelSize, NULL,
       reinterpret_cast<char*>(client_control),
       NULL, &dispatcher, {0} };
   sandbox::CrossCallReturn call_return = {0};
   EXPECT_TRUE(SharedMemIPCServer::InvokeCallback(&srv_control, buff,
                                                  &call_return));
   EXPECT_EQ(SBOX_ALL_OK, call_return.call_outcome);
   EXPECT_TRUE(bar == call_return.extended[0].handle);
   EXPECT_EQ(foo, call_return.extended[1].unsigned_int);
   CloseChannelEvents(client_control);
   delete[] reinterpret_cast<char*>(client_control);
 }
 }  // namespace sandbox

The Tor Browser / annotate

security/sandbox/win/src/ipc_unittest.cc@b8a032363ba2 (annotated)

security/sandbox/win/src/ipc_unittest.cc