GH-111807: Lower the parser stack depth under WASI debug builds (#112225)

brettcannon · web-flow · commit 56e59a49ae4d · 2023-11-20T13:27:33.000Z
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-11-17-16-49-32.gh-issue-111807.QvjP9_.rst b/Misc/NEWS.d/next/Core and Builtins/2023-11-17-16-49-32.gh-issue-111807.QvjP9_.rst
@@ -0,0 +1 @@
+Lower the max parser stack depth to 1000 under WASI debug builds.
diff --git a/Parser/parser.c b/Parser/parser.c
diff --git a/Tools/peg_generator/pegen/c_generator.py b/Tools/peg_generator/pegen/c_generator.py
@@ -38,7 +38,11 @@
 #endif
 
 #ifdef __wasi__
-#  define MAXSTACK 4000
+#  ifdef Py_DEBUG
+#    define MAXSTACK 1000
+#  else
+#    define MAXSTACK 4000
+#  endif
 #else
 #  define MAXSTACK 6000
 #endif

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Lower the max parser stack depth to 1000 under WASI debug builds.`