[WASM_WORKERS] Ensure TLS is initialized (#22856)

The main thread TLS region get initialized via a static constructor in
`library_wasm_worker.c`. Without this change programs that don't
otherwise reference `library_wasm_worker.c` will not have this static
constructor run.

Fixes: #22852

Author: sbc100

test/common.py

@@ -614,7 +614,7 @@ def with_all_sjlj(f):
   assert callable(f)
 
   @wraps(f)
-  def metafunc(self, mode):
+  def metafunc(self, mode, *args, **kwargs):
     if mode == 'wasm' or mode == 'wasm_exnref':
       if self.is_wasm2js():
         self.skipTest('wasm2js does not support wasm SjLj')
@@ -627,10 +627,10 @@ def metafunc(self, mode):
       if mode == 'wasm_exnref':
         self.require_wasm_exnref()
         self.set_setting('WASM_EXNREF')
-      f(self)
+      f(self, *args, **kwargs)
     else:
       self.set_setting('SUPPORT_LONGJMP', 'emscripten')
-      f(self)
+      f(self, *args, **kwargs)
 
   parameterize(metafunc, {'emscripten': ('emscripten',),
                           'wasm': ('wasm',),

test/test_core.py

@@ -863,6 +863,9 @@ def test_longjmp_standalone(self):
   def test_longjmp(self):
     self.do_core_test('test_longjmp.c')
 
+  def test_longjmp_wasm_workers(self):
+    self.do_core_test('test_longjmp.c', emcc_args=['-sWASM_WORKERS'])
+
   @with_all_sjlj
   def test_longjmp_zero(self):
     if '-fsanitize=undefined' in self.emcc_args and self.get_setting('SUPPORT_LONGJMP') == 'emscripten':

tools/system_libs.py

@@ -2276,7 +2276,7 @@ def get_libs_to_link(args):
   if force_include:
     logger.debug(f'forcing stdlibs: {force_include}')
 
-  def add_library(libname):
+  def add_library(libname, whole_archive=False):
     lib = system_libs_map[libname]
     if lib.name in already_included:
       return
@@ -2285,7 +2285,7 @@ def add_library(libname):
     logger.debug('including %s (%s)' % (lib.name, lib.get_filename()))
 
     need_whole_archive = lib.name in force_include and lib.get_ext() == '.a'
-    libs_to_link.append((lib.get_link_flag(), need_whole_archive))
+    libs_to_link.append((lib.get_link_flag(), whole_archive or need_whole_archive))
 
   if '-nostartfiles' not in args:
     if settings.SHARED_MEMORY:
@@ -2396,7 +2396,10 @@ def add_sanitizer_libs():
   if settings.WASM_WORKERS and (not settings.SINGLE_FILE and
                                 not settings.RELOCATABLE and
                                 not settings.PROXY_TO_WORKER):
-    add_library('libwasm_workers')
+    # When we include libwasm_workers we use `--whole-archive` to ensure
+    # that the static constructor (`emscripten_wasm_worker_main_thread_initialize`)
+    # is run.
+    add_library('libwasm_workers', whole_archive=True)
 
   if settings.WASMFS:
     # Link in the no-fs version first, so that if it provides all the needed