diff --git a/BUILD b/BUILD
index a15bcded5f1..e46356a81b7 100644
--- a/BUILD
+++ b/BUILD
@@ -374,6 +374,7 @@ cc_library(
     "src/core/support/time_precise.c",
     "src/core/support/time_win32.c",
     "src/core/support/tls_pthread.c",
+    "src/core/support/wrap_memcpy.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/operation.c",
@@ -624,6 +625,7 @@ cc_library(
     "src/core/support/time_precise.c",
     "src/core/support/time_win32.c",
     "src/core/support/tls_pthread.c",
+    "src/core/support/wrap_memcpy.c",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
     "src/core/channel/channel_args.c",
@@ -1398,6 +1400,7 @@ objc_library(
     "src/core/support/time_precise.c",
     "src/core/support/time_win32.c",
     "src/core/support/tls_pthread.c",
+    "src/core/support/wrap_memcpy.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/operation.c",
diff --git a/Makefile b/Makefile
index 4e8acda1767..87a8adefc65 100644
--- a/Makefile
+++ b/Makefile
@@ -2330,6 +2330,7 @@ LIBGRPC_SRC = \
     src/core/support/time_precise.c \
     src/core/support/time_win32.c \
     src/core/support/tls_pthread.c \
+    src/core/support/wrap_memcpy.c \
     src/core/census/context.c \
     src/core/census/initialize.c \
     src/core/census/operation.c \
@@ -2597,6 +2598,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/support/time_precise.c \
     src/core/support/time_win32.c \
     src/core/support/tls_pthread.c \
+    src/core/support/wrap_memcpy.c \
     src/core/census/grpc_context.c \
     src/core/census/grpc_filter.c \
     src/core/channel/channel_args.c \
@@ -3828,15 +3830,15 @@ ifeq ($(SYSTEM),MINGW32)
 $(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared grpc_csharp_ext.def -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared grpc_csharp_ext.def -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
 else
 $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_csharp_ext.so.0 -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_csharp_ext.so.0 -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CSHARP_EXT_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(ZLIB_MERGE_LIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).so.0
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION).so
 endif
diff --git a/Rakefile b/Rakefile
index 64aaff5fe55..3a30920feae 100755
--- a/Rakefile
+++ b/Rakefile
@@ -70,14 +70,14 @@ end
 desc 'Build the Windows gRPC DLLs for Ruby'
 task 'dlls' do
   grpc_config = ENV['GRPC_CONFIG'] || 'opt'
-  V = ENV['V'] || '0'
+  verbose = ENV['V'] || '0'
 
   env = 'CPPFLAGS="-D_WIN32_WINNT=0x600 -DUNICODE -D_UNICODE" '
   env += 'LDFLAGS=-static '
   env += 'SYSTEM=MINGW32 '
   env += 'EMBED_ZLIB=true '
   env += 'BUILDDIR=/tmp '
-  env += 'V=#{V} '
+  env += "V=#{verbose} "
   out = '/tmp/libs/opt/grpc-0.dll'
 
   w64 = { cross: 'x86_64-w64-mingw32', out: 'grpc_c.64.ruby' }
@@ -93,9 +93,9 @@ end
 
 desc 'Build the gem file under rake_compiler_dock'
 task 'gem:windows' do
-  V = ENV['V'] || '0'
+  verbose = ENV['V'] || '0'
 
-  docker_for_windows "bundle && rake cross native gem RUBY_CC_VERSION=2.3.0:2.2.2:2.1.6:2.0.0 GRPC_CONFIG=#{grpc_config} V=#{V}"
+  docker_for_windows "bundle && rake cross native gem RUBY_CC_VERSION=2.3.0:2.2.2:2.1.6:2.0.0 V=#{verbose}"
 end
 
 # Define dependencies between the suites.
@@ -105,6 +105,8 @@ task 'suite:bidi' => 'suite:wrapper'
 task 'suite:server' => 'suite:wrapper'
 task 'suite:pb' => 'suite:server'
 
+task 'gem:windows' => 'dlls'
+
 desc 'Compiles the gRPC extension then runs all the tests'
 task all: ['suite:idiomatic', 'suite:bidi', 'suite:pb', 'suite:server']
 task default: :all
diff --git a/binding.gyp b/binding.gyp
index 509c50eef5d..aa06024f70d 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -676,6 +676,7 @@
         'src/core/support/time_precise.c',
         'src/core/support/time_win32.c',
         'src/core/support/tls_pthread.c',
+        'src/core/support/wrap_memcpy.c',
         'src/core/census/context.c',
         'src/core/census/initialize.c',
         'src/core/census/operation.c',
@@ -721,6 +722,11 @@
             "boringssl",
             "z",
           ]
+        }],
+        ['OS=="linux"', {
+          'ldflags': [
+            '-Wl,-wrap,memcpy'
+          ]
         }]
       ],
       "target_name": "grpc_node",
diff --git a/build.yaml b/build.yaml
index d30a395ba43..8d38b6a8358 100644
--- a/build.yaml
+++ b/build.yaml
@@ -107,6 +107,7 @@ filegroups:
   - src/core/support/time_precise.c
   - src/core/support/time_win32.c
   - src/core/support/tls_pthread.c
+  - src/core/support/wrap_memcpy.c
 - name: grpc++_base
   public_headers:
   - include/grpc++/channel.h
@@ -841,6 +842,7 @@ libs:
   - src/csharp/ext/grpc_csharp_ext.c
   deps:
   - grpc
+  LDFLAGS: $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy)
   deps_linkage: static
   dll: only
   vs_config_type: DynamicLibrary
diff --git a/gRPC.podspec b/gRPC.podspec
index 0748031298d..ccfce5eaebf 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -448,6 +448,7 @@ Pod::Spec.new do |s|
                       'src/core/support/time_precise.c',
                       'src/core/support/time_win32.c',
                       'src/core/support/tls_pthread.c',
+                      'src/core/support/wrap_memcpy.c',
                       'src/core/census/context.c',
                       'src/core/census/initialize.c',
                       'src/core/census/operation.c',
diff --git a/grpc.gemspec b/grpc.gemspec
index b91c4050f58..0b866db8525 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -432,6 +432,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/support/time_precise.c )
   s.files += %w( src/core/support/time_win32.c )
   s.files += %w( src/core/support/tls_pthread.c )
+  s.files += %w( src/core/support/wrap_memcpy.c )
   s.files += %w( src/core/census/context.c )
   s.files += %w( src/core/census/initialize.c )
   s.files += %w( src/core/census/operation.c )
diff --git a/package.json b/package.json
index 3b879385f94..7ab4ea514b5 100644
--- a/package.json
+++ b/package.json
@@ -471,6 +471,7 @@
     "src/core/support/time_precise.c",
     "src/core/support/time_win32.c",
     "src/core/support/tls_pthread.c",
+    "src/core/support/wrap_memcpy.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/operation.c",
diff --git a/setup.py b/setup.py
index 01e91808543..2f73e94c458 100644
--- a/setup.py
+++ b/setup.py
@@ -80,10 +80,19 @@ EXTENSION_INCLUDE_DIRECTORIES = (
 
 EXTENSION_LIBRARIES = ('m',)
 if not "darwin" in sys.platform:
-    EXTENSION_LIBRARIES += ('rt',)
+  EXTENSION_LIBRARIES += ('rt',)
 
 DEFINE_MACROS = (('OPENSSL_NO_ASM', 1),)
 
+CFLAGS = ()
+LDFLAGS = ()
+if "linux" in sys.platform:
+  LDFLAGS += ('-Wl,-wrap,memcpy',)
+if "linux" in sys.platform or "darwin" in sys.platform:
+  CFLAGS += ('-fvisibility=hidden',)
+  DEFINE_MACROS += (('PyMODINIT_FUNC', '__attribute__((visibility ("default"))) void'),)
+
+
 def cython_extensions(package_names, module_names, include_dirs, libraries,
                       define_macros, build_with_cython=False):
   if ENABLE_CYTHON_TRACING:
diff --git a/src/core/support/wrap_memcpy.c b/src/core/support/wrap_memcpy.c
new file mode 100644
index 00000000000..ac30668ec1b
--- /dev/null
+++ b/src/core/support/wrap_memcpy.c
@@ -0,0 +1,50 @@
+/*
+ *
+ * Copyright 2016, 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 <string.h>
+
+/* Provide a wrapped memcpy for targets that need to be backwards
+ * compatible with older libc's.
+ *
+ * Enable by setting LDFLAGS=-Wl,-wrap,memcpy when linking.
+ */
+
+#ifdef __linux__
+#ifdef __x86_64__
+__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
+#endif
+
+void *__wrap_memcpy(void *destination, const void *source, size_t num) {
+  return memcpy(destination, source, num);
+}
+#endif
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 60bea6fcc2e..1b2490e9ffc 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -220,6 +220,7 @@ CORE_SOURCE_FILES = [
   'src/core/support/time_precise.c',
   'src/core/support/time_win32.c',
   'src/core/support/tls_pthread.c',
+  'src/core/support/wrap_memcpy.c',
   'src/core/census/context.c',
   'src/core/census/initialize.c',
   'src/core/census/operation.c',
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index b259f8146fd..ab27b0415d2 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -92,6 +92,8 @@ if grpc_config == 'gcov'
   $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
 end
 
+$LDFLAGS << ' -Wl,-wrap,memcpy'
+
 $CFLAGS << ' -std=c99 '
 $CFLAGS << ' -Wall '
 $CFLAGS << ' -Wextra '
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 7dd511b2fff..afe83a83368 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -1564,6 +1564,10 @@
 
     if lib.language == 'c++':
       common = common + ' $(LDLIBSXX) $(LDLIBS_PROTOBUF)'
+
+    ldflags = '$(LDFLAGS)'
+    if lib.get('LDFLAGS', None):
+      ldflags += ' ' + lib['LDFLAGS']
   %>
 
   % if lib.build == "all":
@@ -1571,15 +1575,15 @@
   ${out_mingbase}.$(SHARED_EXT): $(LIB${lib.name.upper()}_OBJS) ${mingw_lib_deps}
   	$(E) "[LD]      Linking $@"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) ${ld} $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared ${lib.name}.def -Wl,--output-def=${out_mingbase}.def -Wl,--out-implib=${out_libbase}-dll.a -o ${out_mingbase}.$(SHARED_EXT) ${common}${mingw_libs}
+  	$(Q) ${ld} ${ldflags} -L$(LIBDIR)/$(CONFIG) -shared ${lib.name}.def -Wl,--output-def=${out_mingbase}.def -Wl,--out-implib=${out_libbase}-dll.a -o ${out_mingbase}.$(SHARED_EXT) ${common}${mingw_libs}
   else
   ${out_libbase}.$(SHARED_EXT): $(LIB${lib.name.upper()}_OBJS) ${lib_deps}
   	$(E) "[LD]      Linking $@"
   	$(Q) mkdir -p `dirname $@`
   ifeq ($(SYSTEM),Darwin)
-  	$(Q) ${ld} $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT) -dynamiclib -o ${out_libbase}.$(SHARED_EXT) ${common}${libs}
+  	$(Q) ${ld} ${ldflags} -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT) -dynamiclib -o ${out_libbase}.$(SHARED_EXT) ${common}${libs}
   else
-  	$(Q) ${ld} $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,lib${lib.name}.so.${settings.version.major} -o ${out_libbase}.$(SHARED_EXT) ${common}${libs}
+  	$(Q) ${ld} ${ldflags} -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,lib${lib.name}.so.${settings.version.major} -o ${out_libbase}.$(SHARED_EXT) ${common}${libs}
   	$(Q) ln -sf $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT) ${out_libbase}.so.${settings.version.major}
   	$(Q) ln -sf $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT) ${out_libbase}.so
   endif
diff --git a/templates/binding.gyp.template b/templates/binding.gyp.template
index a913585240d..31c9f8c96cf 100644
--- a/templates/binding.gyp.template
+++ b/templates/binding.gyp.template
@@ -230,6 +230,11 @@
               % endif
               % endfor
             ]
+          }],
+          ['OS=="linux"', {
+            'ldflags': [
+              '-Wl,-wrap,memcpy'
+            ]
           }]
         ],
         "target_name": "${module.name}",
diff --git a/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile
new file mode 100644
index 00000000000..ae21dec2cad
--- /dev/null
+++ b/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile
@@ -0,0 +1,38 @@
+# Copyright 2015-2016, 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.
+
+FROM centos:7
+
+RUN rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"
+RUN yum-config-manager --add-repo http://download.mono-project.com/repo/centos/
+
+RUN yum install -y mono
+RUN yum install -y git
+RUN yum install -y unzip
+
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index e216a02c38c..337d628942e 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -1145,6 +1145,7 @@ src/core/support/time_posix.c \
 src/core/support/time_precise.c \
 src/core/support/time_win32.c \
 src/core/support/tls_pthread.c \
+src/core/support/wrap_memcpy.c \
 src/core/census/context.c \
 src/core/census/initialize.c \
 src/core/census/operation.c \
diff --git a/tools/run_tests/artifact_targets.py b/tools/run_tests/artifact_targets.py
index 32a98c90b8a..573825699f3 100644
--- a/tools/run_tests/artifact_targets.py
+++ b/tools/run_tests/artifact_targets.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2016, Google Inc.
 # All rights reserved.
 #
diff --git a/tools/run_tests/distribtest_targets.py b/tools/run_tests/distribtest_targets.py
index aa1d55aedd2..55fee564152 100644
--- a/tools/run_tests/distribtest_targets.py
+++ b/tools/run_tests/distribtest_targets.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2016, Google Inc.
 # All rights reserved.
 #
@@ -85,4 +85,6 @@ def targets():
   """Gets list of supported targets"""
   return [CSharpDistribTest('linux', 'x64', 'wheezy'),
           CSharpDistribTest('linux', 'x64', 'jessie'),
-          CSharpDistribTest('linux', 'x86', 'jessie')]
+          CSharpDistribTest('linux', 'x86', 'jessie'),
+          CSharpDistribTest('linux', 'x64', 'centos7')]
+
diff --git a/tools/run_tests/package_targets.py b/tools/run_tests/package_targets.py
index 839991e270e..5bc4b1c9c48 100644
--- a/tools/run_tests/package_targets.py
+++ b/tools/run_tests/package_targets.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2016, Google Inc.
 # All rights reserved.
 #
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 6ce618eb779..fbc3b3cdf6f 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
diff --git a/tools/run_tests/run_stress_tests.py b/tools/run_tests/run_stress_tests.py
index 193ff2e53a3..d1faf7d9641 100755
--- a/tools/run_tests/run_stress_tests.py
+++ b/tools/run_tests/run_stress_tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index e17d2112bc5..76065e99c79 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -2944,6 +2944,7 @@
       "src/core/support/time_precise.h", 
       "src/core/support/time_win32.c", 
       "src/core/support/tls_pthread.c", 
+      "src/core/support/wrap_memcpy.c", 
       "src/core/surface/alarm.c", 
       "src/core/surface/api_trace.c", 
       "src/core/surface/api_trace.h", 
@@ -3578,6 +3579,7 @@
       "src/core/support/time_precise.h", 
       "src/core/support/time_win32.c", 
       "src/core/support/tls_pthread.c", 
+      "src/core/support/wrap_memcpy.c", 
       "src/core/surface/alarm.c", 
       "src/core/surface/api_trace.c", 
       "src/core/surface/api_trace.h", 
diff --git a/tools/run_tests/task_runner.py b/tools/run_tests/task_runner.py
index e5ecc4867b5..b42aa17cbbe 100755
--- a/tools/run_tests/task_runner.py
+++ b/tools/run_tests/task_runner.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright 2016, Google Inc.
 # All rights reserved.
 #
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 0bfea97424b..02c5936f2a6 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -846,6 +846,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\support\tls_pthread.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\support\wrap_memcpy.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\context.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\initialize.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 9fa1d0384ac..d6c9ebbc50e 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -571,6 +571,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\support\tls_pthread.c">
       <Filter>src\core\support</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\support\wrap_memcpy.c">
+      <Filter>src\core\support</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\context.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index d75a29fd02b..98cf423e2b2 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -528,6 +528,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\support\tls_pthread.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\support\wrap_memcpy.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_context.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 25d83f472a1..31e2157b029 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -130,6 +130,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\support\tls_pthread.c">
       <Filter>src\core\support</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\support\wrap_memcpy.c">
+      <Filter>src\core\support</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_context.c">
       <Filter>src\core\census</Filter>
     </ClCompile>