Auto-generate files after cl/640196225
diff --git a/ruby/ext/google/protobuf_c/ruby-upb.h b/ruby/ext/google/protobuf_c/ruby-upb.h
index 7a98db8..8a35613 100755
--- a/ruby/ext/google/protobuf_c/ruby-upb.h
+++ b/ruby/ext/google/protobuf_c/ruby-upb.h
@@ -348,6 +348,82 @@
#endif
#endif
+// Linker arrays combine elements from multiple translation units into a single
+// array that can be iterated over at runtime.
+//
+// It is an alternative to pre-main "registration" functions.
+//
+// Usage:
+//
+// // In N translation units.
+// UPB_LINKARR_APPEND(foo_array) static int elems[3] = {1, 2, 3};
+//
+// // At runtime:
+// UPB_LINKARR_DECLARE(foo_array, int);
+//
+// void f() {
+// const int* start = UPB_LINKARR_START(foo_array);
+// const int* stop = UPB_LINKARR_STOP(foo_array);
+// for (const int* p = start; p < stop; p++) {
+// // Windows can introduce zero padding, so we have to skip zeroes.
+// if (*p != 0) {
+// vec.push_back(*p);
+// }
+// }
+// }
+
+#if defined(__ELF__) || defined(__wasm__)
+
+#define UPB_LINKARR_APPEND(name) \
+ __attribute__((retain, used, section("linkarr_" #name)))
+#define UPB_LINKARR_DECLARE(name, type) \
+ extern type const __start_linkarr_##name; \
+ extern type const __stop_linkarr_##name; \
+ UPB_LINKARR_APPEND(name) type UPB_linkarr_internal_empty_##name[1] = {0}
+#define UPB_LINKARR_START(name) (&__start_linkarr_##name)
+#define UPB_LINKARR_STOP(name) (&__stop_linkarr_##name)
+
+#elif defined(__MACH__)
+
+/* As described in: https://stackoverflow.com/a/22366882 */
+#define UPB_LINKARR_APPEND(name) \
+ __attribute__((retain, used, section("__DATA,la_" #name)))
+#define UPB_LINKARR_DECLARE(name, type) \
+ extern type const __start_linkarr_##name __asm( \
+ "section$start$__DATA$la_" #name); \
+ extern type const __stop_linkarr_##name __asm( \
+ "section$end$__DATA$" \
+ "la_" #name); \
+ UPB_LINKARR_APPEND(name) type UPB_linkarr_internal_empty_##name[1] = {0}
+#define UPB_LINKARR_START(name) (&__start_linkarr_##name)
+#define UPB_LINKARR_STOP(name) (&__stop_linkarr_##name)
+
+#elif defined(_MSC_VER) && defined(__clang__)
+
+/* See:
+ * https://devblogs.microsoft.com/oldnewthing/20181107-00/?p=100155
+ * https://devblogs.microsoft.com/oldnewthing/20181108-00/?p=100165
+ * https://devblogs.microsoft.com/oldnewthing/20181109-00/?p=100175 */
+
+// Usage of __attribute__ here probably means this is Clang-specific, and would
+// not work on MSVC.
+#define UPB_LINKARR_APPEND(name) \
+ __declspec(allocate("la_" #name "$j")) __attribute__((retain, used))
+#define UPB_LINKARR_DECLARE(name, type) \
+ __declspec(allocate("la_" #name "$a")) type __start_linkarr_##name; \
+ __declspec(allocate("la_" #name "$z")) type __stop_linkarr_##name; \
+ UPB_LINKARR_APPEND(name) type UPB_linkarr_internal_empty_##name[1] = {0}
+#define UPB_LINKARR_START(name) (&__start_linkarr_##name)
+#define UPB_LINKARR_STOP(name) (&__stop_linkarr_##name)
+
+#else
+
+// Linker arrays are not supported on this platform. Make appends a no-op but
+// don't define the other macros.
+#define UPB_LINKARR_APPEND(name)
+
+#endif
+
#ifndef UPB_BASE_STATUS_H_
#define UPB_BASE_STATUS_H_
@@ -4285,6 +4361,23 @@
const upb_MiniTableExtension** e,
size_t count);
+#ifdef UPB_LINKARR_DECLARE
+
+// Adds all extensions linked into the binary into the registry. The set of
+// linked extensions is assembled by the linker using linker arrays. This
+// will likely not work properly if the extensions are split across multiple
+// shared libraries.
+//
+// Returns true if all extensions were added successfully, false on out of
+// memory or if any extensions were already present.
+//
+// This API is currently not available on MSVC (though it *is* available on
+// Windows using clang-cl).
+UPB_API bool upb_ExtensionRegistry_AddAllLinkedExtensions(
+ upb_ExtensionRegistry* r);
+
+#endif // UPB_LINKARR_DECLARE
+
// Looks up the extension (if any) defined for message type |t| and field
// number |num|. Returns the extension if found, otherwise NULL.
UPB_API const upb_MiniTableExtension* upb_ExtensionRegistry_Lookup(
@@ -14713,3 +14806,7 @@
#undef UPB_USE_C11_ATOMICS
#undef UPB_PRIVATE
#undef UPB_ONLYBITS
+#undef UPB_LINKARR_DECLARE
+#undef UPB_LINKARR_APPEND
+#undef UPB_LINKARR_START
+#undef UPB_LINKARR_STOP
