[Python-checkins] gh-84461: Fix ctypes and test_ctypes on Emscripten (#94142)

tiran webhook-mailer at python.org
Fri Jun 24 06:40:52 EDT 2022

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https://github.com/python/cpython/commit/8625802d854ec0152177a6ff0ac092e0e3ff98a5
commit: 8625802d854ec0152177a6ff0ac092e0e3ff98a5
branch: main
author: Christian Heimes <christian at python.org>
committer: tiran <christian at python.org>
date: 2022年06月24日T12:40:43+02:00
summary:
gh-84461: Fix ctypes and test_ctypes on Emscripten (#94142)
- c_longlong and c_longdouble need experimental WASM bigint.
- Skip tests that need threading
- Define ``CTYPES_MAX_ARGCOUNT`` for Emscripten. libffi-emscripten 2022年06月23日 supports up to 1000 args.
files:
M Lib/test/test_code.py
M Lib/test/test_ctypes/test_as_parameter.py
M Lib/test/test_ctypes/test_callbacks.py
M Lib/test/test_ctypes/test_cfuncs.py
M Lib/test/test_ctypes/test_functions.py
M Modules/_ctypes/ctypes.h
M Tools/wasm/README.md
M configure
M configure.ac
diff --git a/Lib/test/test_code.py b/Lib/test/test_code.py
index a6857dc4f8412..308141aaf10e5 100644
--- a/Lib/test/test_code.py
+++ b/Lib/test/test_code.py
@@ -141,6 +141,7 @@
 check_impl_detail, requires_debug_ranges,
 gc_collect)
 from test.support.script_helper import assert_python_ok
+from test.support import threading_helper
 from opcode import opmap
 COPY_FREE_VARS = opmap['COPY_FREE_VARS']
 
@@ -723,6 +724,7 @@ def test_get_set(self):
 self.assertEqual(extra.value, 300)
 del f
 
+ @threading_helper.requires_working_threading()
 def test_free_different_thread(self):
 # Freeing a code object on a different thread then
 # where the co_extra was set should be safe.
diff --git a/Lib/test/test_ctypes/test_as_parameter.py b/Lib/test/test_ctypes/test_as_parameter.py
index b35defb15851a..e9ec9ad847b48 100644
--- a/Lib/test/test_ctypes/test_as_parameter.py
+++ b/Lib/test/test_ctypes/test_as_parameter.py
@@ -122,6 +122,7 @@ def callback(value):
 result = f(self.wrap(-10), self.wrap(cb))
 self.assertEqual(result, -18)
 
+ @need_symbol('c_longlong')
 def test_longlong_callbacks(self):
 
 f = dll._testfunc_callback_q_qf
diff --git a/Lib/test/test_ctypes/test_callbacks.py b/Lib/test/test_ctypes/test_callbacks.py
index 2758720d4a954..b5bef04e14d20 100644
--- a/Lib/test/test_ctypes/test_callbacks.py
+++ b/Lib/test/test_ctypes/test_callbacks.py
@@ -65,10 +65,12 @@ def test_long(self):
 def test_ulong(self):
 self.check_type(c_ulong, 42)
 
+ @need_symbol('c_longlong')
 def test_longlong(self):
 self.check_type(c_longlong, 42)
 self.check_type(c_longlong, -42)
 
+ @need_symbol('c_ulonglong')
 def test_ulonglong(self):
 self.check_type(c_ulonglong, 42)
 
@@ -82,6 +84,7 @@ def test_double(self):
 self.check_type(c_double, 3.14)
 self.check_type(c_double, -3.14)
 
+ @need_symbol('c_longdouble')
 def test_longdouble(self):
 self.check_type(c_longdouble, 3.14)
 self.check_type(c_longdouble, -3.14)
diff --git a/Lib/test/test_ctypes/test_cfuncs.py b/Lib/test/test_ctypes/test_cfuncs.py
index 0a9394bf31359..7cba4b0e527f4 100644
--- a/Lib/test/test_ctypes/test_cfuncs.py
+++ b/Lib/test/test_ctypes/test_cfuncs.py
@@ -111,24 +111,28 @@ def test_ulong_plus(self):
 self.assertEqual(self._dll.tf_bL(b' ', 4294967295), 1431655765)
 self.assertEqual(self.U(), 4294967295)
 
+ @need_symbol('c_longlong')
 def test_longlong(self):
 self._dll.tf_q.restype = c_longlong
 self._dll.tf_q.argtypes = (c_longlong, )
 self.assertEqual(self._dll.tf_q(-9223372036854775806), -3074457345618258602)
 self.assertEqual(self.S(), -9223372036854775806)
 
+ @need_symbol('c_longlong')
 def test_longlong_plus(self):
 self._dll.tf_bq.restype = c_longlong
 self._dll.tf_bq.argtypes = (c_byte, c_longlong)
 self.assertEqual(self._dll.tf_bq(0, -9223372036854775806), -3074457345618258602)
 self.assertEqual(self.S(), -9223372036854775806)
 
+ @need_symbol('c_ulonglong')
 def test_ulonglong(self):
 self._dll.tf_Q.restype = c_ulonglong
 self._dll.tf_Q.argtypes = (c_ulonglong, )
 self.assertEqual(self._dll.tf_Q(18446744073709551615), 6148914691236517205)
 self.assertEqual(self.U(), 18446744073709551615)
 
+ @need_symbol('c_ulonglong')
 def test_ulonglong_plus(self):
 self._dll.tf_bQ.restype = c_ulonglong
 self._dll.tf_bQ.argtypes = (c_byte, c_ulonglong)
@@ -159,12 +163,14 @@ def test_double_plus(self):
 self.assertEqual(self._dll.tf_bd(0, 42.), 14.)
 self.assertEqual(self.S(), 42)
 
+ @need_symbol('c_longdouble')
 def test_longdouble(self):
 self._dll.tf_D.restype = c_longdouble
 self._dll.tf_D.argtypes = (c_longdouble,)
 self.assertEqual(self._dll.tf_D(42.), 14.)
 self.assertEqual(self.S(), 42)
 
+ @need_symbol('c_longdouble')
 def test_longdouble_plus(self):
 self._dll.tf_bD.restype = c_longdouble
 self._dll.tf_bD.argtypes = (c_byte, c_longdouble)
diff --git a/Lib/test/test_ctypes/test_functions.py b/Lib/test/test_ctypes/test_functions.py
index 4a784c8d79894..a3db0033533fb 100644
--- a/Lib/test/test_ctypes/test_functions.py
+++ b/Lib/test/test_ctypes/test_functions.py
@@ -128,6 +128,7 @@ def test_doubleresult(self):
 self.assertEqual(result, -21)
 self.assertEqual(type(result), float)
 
+ @need_symbol('c_longdouble')
 def test_longdoubleresult(self):
 f = dll._testfunc_D_bhilfD
 f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_longdouble]
diff --git a/Modules/_ctypes/ctypes.h b/Modules/_ctypes/ctypes.h
index da1941caf3927..88eb9f59922a0 100644
--- a/Modules/_ctypes/ctypes.h
+++ b/Modules/_ctypes/ctypes.h
@@ -19,7 +19,11 @@
 * to avoid allocating a massive buffer on the stack.
 */
 #ifndef CTYPES_MAX_ARGCOUNT
- #define CTYPES_MAX_ARGCOUNT 1024
+ #ifdef __EMSCRIPTEN__
+ #define CTYPES_MAX_ARGCOUNT 1000
+ #else
+ #define CTYPES_MAX_ARGCOUNT 1024
+ #endif
 #endif
 
 typedef struct tagPyCArgObject PyCArgObject;
diff --git a/Tools/wasm/README.md b/Tools/wasm/README.md
index 4a711a6eb5627..94b3729a5daad 100644
--- a/Tools/wasm/README.md
+++ b/Tools/wasm/README.md
@@ -173,6 +173,8 @@ functions.
 [bpo-46390](https://bugs.python.org/issue46390).
 - Python's object allocator ``obmalloc`` is disabled by default.
 - ``ensurepip`` is not available.
+- Some ``ctypes`` features like ``c_longlong`` and ``c_longdouble`` may need
+ NodeJS option ``--experimental-wasm-bigint``.
 
 ## wasm32-emscripten in browsers
 
diff --git a/configure b/configure
index c7bafb3b94969..34de0f7f1b66c 100755
--- a/configure
+++ b/configure
@@ -6775,13 +6775,11 @@ then
 case $ac_sys_system/$ac_sys_emscripten_target in #(
 Emscripten/node*) :
 
+ # bigint for ctypes c_longlong, c_longdouble
+ HOSTRUNNER="node --experimental-wasm-bigint"
 if test "x$enable_wasm_pthreads" = xyes; then :
 
- HOSTRUNNER='node --experimental-wasm-threads --experimental-wasm-bulk-memory'
-
-else
-
- HOSTRUNNER='node'
+ HOSTRUNNER="$HOSTRUNNER --experimental-wasm-threads --experimental-wasm-bulk-memory"
 
 fi
 ;; #(
diff --git a/configure.ac b/configure.ac
index 4f8e7e3cd4684..3b70532e4d0e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1486,10 +1486,10 @@ if test -z "$HOSTRUNNER"
 then
 AS_CASE([$ac_sys_system/$ac_sys_emscripten_target],
 [Emscripten/node*], [
+ # bigint for ctypes c_longlong, c_longdouble
+ HOSTRUNNER="node --experimental-wasm-bigint"
 AS_VAR_IF([enable_wasm_pthreads], [yes], [
- HOSTRUNNER='node --experimental-wasm-threads --experimental-wasm-bulk-memory'
- ], [
- HOSTRUNNER='node'
+ HOSTRUNNER="$HOSTRUNNER --experimental-wasm-threads --experimental-wasm-bulk-memory"
 ])
 ],
 dnl TODO: support other WASI runtimes

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