Enable check for use-after-dtor

Makefile

@@ -114,7 +114,7 @@ CC_msan = clang
 CXX_msan = clang++
 LD_msan = clang++
 LDXX_msan = clang++
-CPPFLAGS_msan = -O0 -fsanitize-coverage=edge -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
+CPPFLAGS_msan = -O0 -fsanitize-coverage=edge -fsanitize=memory -fsanitize-memory-track-origins -fsanitize-memory-use-after-dtor -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_msan = -fsanitize=memory -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
 DEFINES_msan = NDEBUG
 

build.yaml

@@ -4915,8 +4915,8 @@ configs:
   msan:
     CC: clang
     CPPFLAGS: -O0 -fsanitize-coverage=edge -fsanitize=memory -fsanitize-memory-track-origins
-      -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1
+      -fsanitize-memory-use-after-dtor -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0
-      -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
+      -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
     CXX: clang++
     DEFINES: NDEBUG
     LD: clang++
@@ -4924,6 +4924,8 @@ configs:
       -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
     LDXX: clang++
     compile_the_world: true
+    test_environ:
+      MSAN_OPTIONS: poison_in_dtor=1
   mutrace:
     CPPFLAGS: -O3 -fno-omit-frame-pointer
     DEFINES: NDEBUG

tools/run_tests/generated/configs.json

@@ -20,7 +20,10 @@
     }
   }, 
   {
-    "config": "msan"
+    "config": "msan", 
+    "environ": {
+      "MSAN_OPTIONS": "poison_in_dtor=1"
+    }
   }, 
   {
     "config": "basicprof"