[compiler-rt][fuzzer] implements SetThreadName for fuchsia. (#99953)

Author: devnexen

compiler-rt/lib/fuzzer/FuzzerUtilFuchsia.cpp

@@ -607,7 +607,13 @@ size_t PageSize() {
 }
 
 void SetThreadName(std::thread &thread, const std::string &name) {
-  // TODO ?
+  if (name.size() > 31)
+    name.resize(31);
+  zx_status_t s;
+  if ((s = zx_object_set_property(thread.native_handle(), ZX_PROP_NAME,
+                                  name.c_str(), name.size())) != ZX_OK)
+    Printf("SetThreadName for name %s failed: %s", name.c_str(),
+           zx_status_get_string(s));
 }
 
 } // namespace fuzzer