Reduce C recursion depth on WASI.

Author: markshannon

Include/cpython/pystate.h

@@ -204,7 +204,16 @@ struct _ts {
     _PyCFrame root_cframe;
 };
 
-#define C_RECURSION_LIMIT 800
+/* WASI has limited call stack. Python's recursion limit depends on code
+   layout, optimization, and WASI runtime. Wasmtime can handle about 700
+   recursions, sometimes less. 500 is a more conservative limit. */
+#ifndef Py_DEFAULT_RECURSION_LIMIT
+#  ifdef __wasi__
+#    define C_RECURSION_LIMIT 500
+#  else
+#    define C_RECURSION_LIMIT 800
+#  endif
+#endif
 
 /* other API */
 

Include/internal/pycore_ceval.h

@@ -12,16 +12,7 @@ extern "C" {
 struct pyruntimestate;
 struct _ceval_runtime_state;
 
-/* WASI has limited call stack. Python's recursion limit depends on code
-   layout, optimization, and WASI runtime. Wasmtime can handle about 700-750
-   recursions, sometimes less. 600 is a more conservative limit. */
-#ifndef Py_DEFAULT_RECURSION_LIMIT
-#  ifdef __wasi__
-#    define Py_DEFAULT_RECURSION_LIMIT 600
-#  else
-#    define Py_DEFAULT_RECURSION_LIMIT 1000
-#  endif
-#endif
+#define Py_DEFAULT_RECURSION_LIMIT 1000
 
 #include "pycore_interp.h"        // PyInterpreterState.eval_frame
 #include "pycore_pystate.h"       // _PyThreadState_GET()