Channel stack builder name needs to be static (#28711)

* Channel stack builder name needs to be static for stream refcount tracing

* Add test

src/core/lib/channel/channel_stack_builder.cc

@@ -83,8 +83,7 @@ grpc_error_handle ChannelStackBuilder::Build(size_t prefix_bytes,
   // and initialize it
   grpc_error_handle error = grpc_channel_stack_init(
       initial_refs, destroy, destroy_arg == nullptr ? *result : destroy_arg,
-      filters.data(), filters.size(), args_, transport_, name_.c_str(),
-      channel_stack);
+      filters.data(), filters.size(), args_, transport_, name_, channel_stack);
 
   if (error != GRPC_ERROR_NONE) {
     grpc_channel_stack_destroy(channel_stack);

src/core/lib/channel/channel_stack_builder.h

@@ -43,7 +43,7 @@ class ChannelStackBuilder {
   };
 
   // Initialize with a name.
-  explicit ChannelStackBuilder(std::string name) : name_(std::move(name)) {}
+  explicit ChannelStackBuilder(const char* name) : name_(name) {}
 
   ~ChannelStackBuilder();
 
@@ -91,7 +91,7 @@ class ChannelStackBuilder {
   static std::string unknown_target() { return "unknown"; }
 
   // The name of the stack
-  const std::string name_;
+  const char* const name_;
   // The target
   std::string target_{unknown_target()};
   // The transport

test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-minimized-api_fuzzer-5180720131997696

@@ -0,0 +1,106 @@
+actions {
+  create_channel {
+    target: "unix:"
+    channel_actions {
+      add_n_bytes_writable: 150
+      wait_ms: 150
+    }
+  }
+}
+actions {
+  check_connectivity: true
+}
+actions {
+  create_server {
+    channel_args {
+      key: "grpc.http2.max_ping_strikes"
+    }
+  }
+}
+actions {
+  request_call {
+  }
+}
+actions {
+  advance_time: 1886680168
+}
+actions {
+  watch_connectivity: 1886680167
+}
+actions {
+  advance_time: 1886680168
+}
+actions {
+  ping {
+  }
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+  shutdown_server {
+  }
+}
+actions {
+  advance_time: 1543528704
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+  get_target {
+  }
+}
+actions {
+  advance_time: 1886680168
+}
+actions {
+  advance_time: 745829480
+}
+actions {
+  enable_tracer: "all"
+}
+actions {
+  request_call {
+  }
+}
+actions {
+  shutdown_server {
+  }
+}
+actions {
+  advance_time: 1886680168
+}
+actions {
+  advance_time: 1886680167
+}
+actions {
+  advance_time: 1886680168
+}
+actions {
+  advance_time: 1543528704
+}
+actions {
+  ping {
+  }
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+  advance_time: 4194238464
+}
+actions {
+}
+actions {
+  destroy_call {
+  }
+}
+actions {
+}