src: reuse cached env strings in remaining files

Follow-up to #59891, covering files it missed.
Overlapping locations (node_ffi.cc, crypto_util.cc) were already
handled by #64760.

Refs: #59891
Refs: #64760
Refs: #64912

Signed-off-by: leah-1ee <selee3196@gmail.com>
PR-URL: #65039
Refs: #59891
Refs: #64760
Refs: #64912
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: leah-1ee

src/node_constants.cc

@@ -1378,11 +1378,7 @@ void CreatePerContextProperties(Local<Object> target,
             FIXED_ONE_BYTE_STRING(isolate, "dlopen"),
             dlopen_constants)
       .Check();
-  os_constants
-      ->Set(env->context(),
-            FIXED_ONE_BYTE_STRING(isolate, "errno"),
-            err_constants)
-      .Check();
+  os_constants->Set(env->context(), env->errno_string(), err_constants).Check();
   os_constants
       ->Set(env->context(),
             FIXED_ONE_BYTE_STRING(isolate, "signals"),

src/node_locks.cc

@@ -817,10 +817,10 @@ void CreatePerIsolateProperties(IsolateData* isolate_data,
   PropertyAttribute read_only = static_cast<PropertyAttribute>(
       PropertyAttribute::ReadOnly | PropertyAttribute::DontDelete);
   target->Set(FIXED_ONE_BYTE_STRING(isolate, "LOCK_MODE_SHARED"),
-              FIXED_ONE_BYTE_STRING(isolate, "shared"),
+              isolate_data->shared_string(),
               read_only);
   target->Set(FIXED_ONE_BYTE_STRING(isolate, "LOCK_MODE_EXCLUSIVE"),
-              FIXED_ONE_BYTE_STRING(isolate, "exclusive"),
+              isolate_data->exclusive_string(),
               read_only);
   target->Set(FIXED_ONE_BYTE_STRING(isolate, "LOCK_STOLEN_ERROR"),
               FIXED_ONE_BYTE_STRING(isolate, "LOCK_STOLEN"),