Use JSPI to refer to ASYNCIFY=2 rather than stack switching. NFC (#19564)

It seems we have transitions to using that name when we talk about this
feature.  It also avoids confusion with true stack switching which is
a different proposal.

Author: sbc100

.circleci/config.yml

@@ -467,7 +467,7 @@ jobs:
             asan.test_dyncall_specific_minimal_runtime
             asan.test_async_hello
             asan.test_dlfcn_basic
-            asan.test_async_hello_stack_switching
+            asan.test_async_hello_jspi
             asan.test_cubescript
             asan.test_wasm_worker_hello
             lsan.test_stdio_locking

emcc.py

@@ -2825,7 +2825,7 @@ def get_full_import_name(name):
     settings.ASYNCIFY_IMPORTS = [get_full_import_name(i) for i in settings.ASYNCIFY_IMPORTS]
 
     if settings.ASYNCIFY == 2:
-      diagnostics.warning('experimental', 'ASYNCIFY with stack switching is experimental')
+      diagnostics.warning('experimental', '-sASYNCIFY=2 (JSPI) is still experimental')
 
   if settings.WASM2JS:
     if settings.GENERATE_SOURCE_MAP:

test/test_core.py

@@ -224,11 +224,11 @@ def metafunc(self, standalone):
   return decorated
 
 
-def with_asyncify_and_stack_switching(f):
+def with_asyncify_and_jspi(f):
   assert callable(f)
 
-  def metafunc(self, stack_switching):
-    if stack_switching:
+  def metafunc(self, jspi):
+    if jspi:
       self.set_setting('ASYNCIFY', 2)
       self.require_jspi()
       if not self.is_wasm():
@@ -242,7 +242,7 @@ def metafunc(self, stack_switching):
       f(self)
 
   metafunc._parameterize = {'': (False,),
-                            'stack_switching': (True,)}
+                            'jspi': (True,)}
   return metafunc
 
 
@@ -8150,7 +8150,7 @@ def test_vswprintf_utf8(self):
 
   # Test that a main with arguments is automatically asyncified.
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_async_main(self):
     create_file('main.c',  r'''
 #include <stdio.h>
@@ -8164,7 +8164,7 @@ def test_async_main(self):
     self.do_runf('main.c', 'argc=2 argv=hello', args=['hello'])
 
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_async_hello(self):
     # needs to flush stdio streams
     self.set_setting('EXIT_RUNTIME')
@@ -8189,7 +8189,7 @@ def test_async_hello(self):
     self.do_runf('main.c', 'HelloWorld!99')
 
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_async_loop(self):
     # needs to flush stdio streams
     self.set_setting('EXIT_RUNTIME')
@@ -8245,7 +8245,7 @@ def test_async_ccall_bad(self):
     self.do_runf('main.c', 'The call to main is running asynchronously.')
 
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_async_ccall_good(self):
     # check reasonable ccall use
     # needs to flush stdio streams
@@ -8322,7 +8322,7 @@ def test_fibers_asyncify(self):
     self.do_runf(test_file('test_fibers.cpp'), '*leaf-0-100-1-101-1-102-2-103-3-104-5-105-8-106-13-107-21-108-34-109-*')
 
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_asyncify_unused(self):
     # test a program not using asyncify, but the pref is set
     self.do_core_test('test_hello_world.c')
@@ -8442,7 +8442,7 @@ def test_asyncify_during_exit(self):
   @no_lsan('undefined symbol __global_base')
   @no_wasm2js('dynamic linking support in wasm2js')
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_asyncify_main_module(self):
     self.set_setting('MAIN_MODULE', 2)
     self.do_core_test('test_hello_world.c')
@@ -9686,7 +9686,7 @@ def test_embind_lib_with_asyncify(self, args):
 
   @no_asan('asyncify stack operations confuse asan')
   @no_wasm64('TODO: asyncify for wasm64')
-  @with_asyncify_and_stack_switching
+  @with_asyncify_and_jspi
   def test_em_async_js(self):
     self.uses_es6 = True
     if not self.get_setting('ASYNCIFY'):

test/test_other.py

@@ -12857,7 +12857,7 @@ def test_multiple_g_flags(self):
     self.assertNotIn(b'.debug', read_binary('hello_world.o'))
 
   @requires_v8
-  def test_stack_switching_size(self):
+  def test_jspi_code_size(self):
     # use iostream code here to purposefully get a fairly large wasm file, so
     # that our size comparisons later are meaningful
     create_file('main.cpp', r'''