Fix a memory leak

test/core/util/fuzzer_corpus_test.cc

@@ -20,6 +20,7 @@
 
 #include <dirent.h>
 #include <gflags/gflags.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <gtest/gtest.h>
 #include <stdio.h>
@@ -91,6 +92,7 @@ class ExampleGenerator
           perror("Couldn't open the directory");
           abort();
         }
+        gpr_free(test_srcdir);
       }
     }
   }

test/cpp/naming/resolver_component_tests_runner_invoker.cc

@@ -165,9 +165,9 @@ int main(int argc, char** argv) {
     GPR_ASSERT(FLAGS_grpc_test_directory_relative_to_test_srcdir != "");
     // Use bazel's TEST_SRCDIR environment variable to locate the "test data"
     // binaries.
+    char* test_srcdir = gpr_getenv("TEST_SRCDIR");
     std::string const bin_dir =
-        gpr_getenv("TEST_SRCDIR") +
-        FLAGS_grpc_test_directory_relative_to_test_srcdir +
+        test_srcdir + FLAGS_grpc_test_directory_relative_to_test_srcdir +
         std::string("/test/cpp/naming");
     // Invoke bazel's executeable links to the .sh and .py scripts (don't use
     // the .sh and .py suffixes) to make
@@ -177,6 +177,7 @@ int main(int argc, char** argv) {
         bin_dir + "/" + FLAGS_test_bin_name, bin_dir + "/utils/dns_server",
         bin_dir + "/resolver_test_record_groups.yaml",
         bin_dir + "/utils/dns_resolver", bin_dir + "/utils/tcp_connect");
+    gpr_free(test_srcdir);
   } else {
     // Get the current binary's directory relative to repo root to invoke the
     // correct build config (asan/tsan/dbg, etc.).

test/cpp/util/grpc_tool_test.cc

@@ -22,6 +22,7 @@
 
 #include <gflags/gflags.h>
 #include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
 #include <grpcpp/channel.h>
 #include <grpcpp/client_context.h>
 #include <grpcpp/create_channel.h>
@@ -738,6 +739,8 @@ TEST_F(GrpcToolTest, CallCommandWithBadMetadata) {
 
   FLAGS_metadata = "";
   FLAGS_protofiles = "";
+
+  gpr_free(test_srcdir);
 }
 
 }  // namespace testing