Fix read from uninitialized memory bug in GrpcBufferWriter.

This commit fixes an issue in which the following sequence of operations
leads to use of uninitialized memory:

1. Caller invokes GrpcBufferWriter::Next(), and then makes use of 8191
   bytes in the returned buffer (which is 8192 bytes in size).

2. Caller then returns the unused single byte via
   GrpcBufferWriter::BackUp(). This method invokes
   g_core_codegen_interface->grpc_slice_split_tail(), which causes
   backup_slice_ to be a grpc_slice with one byte.

3. At the next invocation of GrpcBufferWriter::Next(), a reference to
   the single byte grpc_slice is returned to the caller.

The problem here is that the returned reference is to the inlined buffer
in the grpc_slice, which is resident in slice_, not the location of the
buffer inside slice_buffer_ after
g_core_codegen_interface->grpc_slice_buffer_add() in
GrpcBufferWriter::Next(). As a result, any data the caller writes to the
returned void* data is lost.

The solution is to avoid inlined backup slices.

10 files changed, 681 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d52e199842..c6a57e5f82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -611,6 +611,7 @@ add_dependencies(buildtests_cxx metrics_client)
 add_dependencies(buildtests_cxx mock_test)
 add_dependencies(buildtests_cxx noop-benchmark)
 add_dependencies(buildtests_cxx proto_server_reflection_test)
+add_dependencies(buildtests_cxx proto_utils_test)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 add_dependencies(buildtests_cxx qps_interarrival_test)
 endif()
@@ -8486,6 +8487,37 @@ target_link_libraries(proto_server_reflection_test
 
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
+
+add_executable(proto_utils_test
+  test/cpp/codegen/proto_utils_test.cc
+  third_party/googletest/src/gtest-all.cc
+)
+
+
+target_include_directories(proto_utils_test
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+  PRIVATE third_party/googletest/include
+  PRIVATE third_party/googletest
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(proto_utils_test
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc++
+  grpc
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 
 add_executable(qps_interarrival_test
diff --git a/Makefile b/Makefile
index 0413cc0e00..d6b7a659be 100644
--- a/Makefile
+++ b/Makefile
@@ -1072,6 +1072,7 @@ metrics_client: $(BINDIR)/$(CONFIG)/metrics_client
 mock_test: $(BINDIR)/$(CONFIG)/mock_test
 noop-benchmark: $(BINDIR)/$(CONFIG)/noop-benchmark
 proto_server_reflection_test: $(BINDIR)/$(CONFIG)/proto_server_reflection_test
+proto_utils_test: $(BINDIR)/$(CONFIG)/proto_utils_test
 qps_interarrival_test: $(BINDIR)/$(CONFIG)/qps_interarrival_test
 qps_json_driver: $(BINDIR)/$(CONFIG)/qps_json_driver
 qps_openloop_test: $(BINDIR)/$(CONFIG)/qps_openloop_test
@@ -1469,6 +1470,7 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/mock_test \
   $(BINDIR)/$(CONFIG)/noop-benchmark \
   $(BINDIR)/$(CONFIG)/proto_server_reflection_test \
+  $(BINDIR)/$(CONFIG)/proto_utils_test \
   $(BINDIR)/$(CONFIG)/qps_interarrival_test \
   $(BINDIR)/$(CONFIG)/qps_json_driver \
   $(BINDIR)/$(CONFIG)/qps_openloop_test \
@@ -1572,6 +1574,7 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/mock_test \
   $(BINDIR)/$(CONFIG)/noop-benchmark \
   $(BINDIR)/$(CONFIG)/proto_server_reflection_test \
+  $(BINDIR)/$(CONFIG)/proto_utils_test \
   $(BINDIR)/$(CONFIG)/qps_interarrival_test \
   $(BINDIR)/$(CONFIG)/qps_json_driver \
   $(BINDIR)/$(CONFIG)/qps_openloop_test \
@@ -1901,6 +1904,8 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/noop-benchmark || ( echo test noop-benchmark failed ; exit 1 )
 	$(E) "[RUN]     Testing proto_server_reflection_test"
 	$(Q) $(BINDIR)/$(CONFIG)/proto_server_reflection_test || ( echo test proto_server_reflection_test failed ; exit 1 )
+	$(E) "[RUN]     Testing proto_utils_test"
+	$(Q) $(BINDIR)/$(CONFIG)/proto_utils_test || ( echo test proto_utils_test failed ; exit 1 )
 	$(E) "[RUN]     Testing qps_openloop_test"
 	$(Q) $(BINDIR)/$(CONFIG)/qps_openloop_test || ( echo test qps_openloop_test failed ; exit 1 )
 	$(E) "[RUN]     Testing round_robin_end2end_test"
@@ -13907,6 +13912,49 @@ endif
 endif
 
 
+PROTO_UTILS_TEST_SRC = \
+    test/cpp/codegen/proto_utils_test.cc \
+
+PROTO_UTILS_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(PROTO_UTILS_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/proto_utils_test: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/proto_utils_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/proto_utils_test: $(PROTOBUF_DEP) $(PROTO_UTILS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(PROTO_UTILS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/proto_utils_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/codegen/proto_utils_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+
+deps_proto_utils_test: $(PROTO_UTILS_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(PROTO_UTILS_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 QPS_INTERARRIVAL_TEST_SRC = \
     test/cpp/qps/qps_interarrival_test.cc \
 
diff --git a/build.yaml b/build.yaml
index 456db28cef..cacb5c4790 100644
--- a/build.yaml
+++ b/build.yaml
@@ -3442,6 +3442,18 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: proto_utils_test
+  gtest: true
+  build: test
+  language: c++
+  src:
+  - test/cpp/codegen/proto_utils_test.cc
+  deps:
+  - grpc++
+  - grpc
+  filegroups:
+  - grpc++_codegen_base
+  - grpc++_codegen_proto
 - name: qps_interarrival_test
   build: test
   run: false
diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h
index 2123b62ed9..6df9de4fd2 100644
--- a/include/grpc++/impl/codegen/proto_utils.h
+++ b/include/grpc++/impl/codegen/proto_utils.h
@@ -50,6 +50,8 @@ extern CoreCodegenInterface* g_core_codegen_interface;
 
 namespace internal {
 
+class GrpcBufferWriterPeer;
+
 const int kGrpcBufferWriterMaxBufferLength = 8192;
 
 class GrpcBufferWriter final
@@ -91,13 +93,18 @@ class GrpcBufferWriter final
           &slice_, GRPC_SLICE_LENGTH(slice_) - count);
       g_core_codegen_interface->grpc_slice_buffer_add(slice_buffer_, slice_);
     }
-    have_backup_ = true;
+    // It's dangerous to keep an inlined grpc_slice as the backup slice, since
+    // on a following Next() call, a reference will be returned to this slice
+    // via GRPC_SLICE_START_PTR, which will not be an adddress held by
+    // slice_buffer_.
+    have_backup_ = backup_slice_.refcount != NULL;
     byte_count_ -= count;
   }
 
   grpc::protobuf::int64 ByteCount() const override { return byte_count_; }
 
  private:
+  friend class GrpcBufferWriterPeer;
   const int block_size_;
   int64_t byte_count_;
   grpc_slice_buffer* slice_buffer_;
diff --git a/test/cpp/codegen/codegen_test_full.cc b/test/cpp/codegen/codegen_test_full.cc
index d6e2416b55..bc19fc9669 100644
--- a/test/cpp/codegen/codegen_test_full.cc
+++ b/test/cpp/codegen/codegen_test_full.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2016, Google Inc.
+ * Copyright 2017, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/test/cpp/codegen/proto_utils_test.cc b/test/cpp/codegen/proto_utils_test.cc
new file mode 100644
index 0000000000..1daa142b50
--- /dev/null
+++ b/test/cpp/codegen/proto_utils_test.cc
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/impl/codegen/proto_utils.h>
+#include <grpc++/impl/grpc_library.h>
+#include <gtest/gtest.h>
+
+namespace grpc {
+namespace internal {
+
+static GrpcLibraryInitializer g_gli_initializer;
+
+// Provide access to GrpcBufferWriter internals.
+class GrpcBufferWriterPeer {
+ public:
+  explicit GrpcBufferWriterPeer(internal::GrpcBufferWriter* writer)
+      : writer_(writer) {}
+  bool have_backup() const { return writer_->have_backup_; }
+  const grpc_slice& backup_slice() const { return writer_->backup_slice_; }
+  const grpc_slice& slice() const { return writer_->slice_; }
+
+ private:
+  GrpcBufferWriter* writer_;
+};
+
+class ProtoUtilsTest : public ::testing::Test {};
+
+// Regression test for a memory corruption bug where a series of
+// GrpcBufferWriter Next()/Backup() invocations could result in a dangling
+// pointer returned by Next() due to the interaction between grpc_slice inlining
+// and GRPC_SLICE_START_PTR.
+TEST_F(ProtoUtilsTest, BackupNext) {
+  // Ensure the GrpcBufferWriter internals are initialized.
+  g_gli_initializer.summon();
+
+  grpc_byte_buffer* bp;
+  GrpcBufferWriter writer(&bp, 8192);
+  GrpcBufferWriterPeer peer(&writer);
+
+  void* data;
+  int size;
+  // Allocate a slice.
+  ASSERT_TRUE(writer.Next(&data, &size));
+  EXPECT_EQ(8192, size);
+  // Return a single byte. Before the fix that this test acts as a regression
+  // for, this would have resulted in an inlined backup slice.
+  writer.BackUp(1);
+  EXPECT_TRUE(!peer.have_backup());
+  // On the next allocation, the slice is non-inlined.
+  ASSERT_TRUE(writer.Next(&data, &size));
+  EXPECT_TRUE(peer.slice().refcount != NULL);
+
+  // Cleanup.
+  g_core_codegen_interface->grpc_byte_buffer_destroy(bp);
+}
+
+}  // namespace internal
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index 52d8ae183b..def360afc8 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -3050,6 +3050,23 @@
   }, 
   {
     "deps": [
+      "grpc", 
+      "grpc++", 
+      "grpc++_codegen_base", 
+      "grpc++_codegen_proto"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "proto_utils_test", 
+    "src": [
+      "test/cpp/codegen/proto_utils_test.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
       "gpr", 
       "gpr_test_util", 
       "grpc", 
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 4cc543962e..1b636686cd 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -2980,6 +2980,28 @@
     "ci_platforms": [
       "linux", 
       "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": true, 
+    "language": "c++", 
+    "name": "proto_utils_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.5, 
diff --git a/vsprojects/vcxproj/test/proto_utils_test/proto_utils_test.vcxproj b/vsprojects/vcxproj/test/proto_utils_test/proto_utils_test.vcxproj
new file mode 100644
index 0000000000..fc2355624f
--- /dev/null
+++ b/vsprojects/vcxproj/test/proto_utils_test/proto_utils_test.vcxproj
@@ -0,0 +1,248 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{D55F5F6B-BAB1-C421-7138-CDC08C686DCF}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\cpptest.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\protobuf.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>proto_utils_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>proto_utils_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\core_codegen_interface.h" />
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new file mode 100644
index 0000000000..e6b4a92458
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