Add reference type logging support (emscripten-core#21762)

We need these if we want to enable reference-types feature in Clang by
default.

`test_autodebug_wasm` fails without this if we enable reference-types in
Clang. (Even though the test itself doesn't seem to actually use them,
turning on `EMCC_AUTODEBUG` runs `wasm-opt` with `--instrument-locals`,
which adds imports for `get_` and `set_` functions for the reference
types if reference-types feature is enabled:
https://github.com/WebAssembly/binaryen/blob/8c834e8257b03ea87b639ddac9adefec64fcad00/src/passes/InstrumentLocals.cpp#L179-L187

src/library_autodebug.js

@@ -29,6 +29,14 @@ addToLibrary({
     dbg('get_f64 ' + [loc, index, value]);
     return value;
   },
+  $get_funcref: (loc, index, value) => {
+    dbg('get_funcref ' + [loc, index, value]);
+    return value;
+  },
+  $get_externref: (loc, index, value) => {
+    dbg('get_externref ' + [loc, index, value]);
+    return value;
+  },
   $get_anyref: (loc, index, value) => {
     dbg('get_anyref ' + [loc, index, value]);
     return value;
@@ -55,6 +63,14 @@ addToLibrary({
     dbg('set_f64 ' + [loc, index, value]);
     return value;
   },
+  $set_funcref: (loc, index, value) => {
+    dbg('set_afuncef ' + [loc, index, value]);
+    return value;
+  },
+  $set_externref: (loc, index, value) => {
+    dbg('set_externref ' + [loc, index, value]);
+    return value;
+  },
   $set_anyref: (loc, index, value) => {
     dbg('set_anyref ' + [loc, index, value]);
     return value;
@@ -115,12 +131,16 @@ extraLibraryFuncs.push(
   '$get_i64',
   '$get_f32',
   '$get_f64',
+  '$get_funcref',
+  '$get_externref',
   '$get_anyref',
   '$get_exnref',
   '$set_i32',
   '$set_i64',
   '$set_f32',
   '$set_f64',
+  '$set_funcref',
+  '$set_externref',
   '$set_anyref',
   '$set_exnref',
   '$load_ptr',

test/test_core.py

@@ -6909,6 +6909,12 @@ def image_compare(output):
   @no_asan('autodebug logging interferes with asan')
   @with_env_modify({'EMCC_AUTODEBUG': '1'})
   def test_autodebug_wasm(self):
+    # Even though the test itself doesn't directly use reference types,
+    # Binaryen's '--instrument-locals' will add their logging functions if
+    # reference-types is enabled. So make sure this test passes when
+    # reference-types feature is enabled as well.
+    self.emcc_args += ['-mreference-types']
+    self.node_args += shared.node_reference_types_flags(self.get_nodejs())
     output = self.do_runf('core/test_autodebug.c', 'success')
     # test that the program both works and also emits some of the logging
     # (but without the specific output, as it is logging the actual locals

tools/emscripten.py

@@ -779,12 +779,16 @@ def add_standard_wasm_imports(send_items_map):
       'get_i64',
       'get_f32',
       'get_f64',
+      'get_funcref',
+      'get_externref',
       'get_anyref',
       'get_exnref',
       'set_i32',
       'set_i64',
       'set_f32',
       'set_f64',
+      'set_funcref',
+      'set_externref',
       'set_anyref',
       'set_exnref',
       'load_ptr',