Found while I worked on JDK-8289633.

JVMCI CodeInstaller strdup's the name before creating the codeblob in CodeInstaller::install(). Note that it uses raw strdup instead of os::strdup, which is why this does not show up in NMT. But ~CodeBlob does not release the name.

AFAICS all other places where code blobs are created are using static strings.