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gh-98925: Lower marshal recursion depth for WASI (GH-98938)

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For wasmtime 2.0, the stack depth cost is 6% higher. This causes the default max `marshal` recursion depth to blow the stack.

As the default marshal depth is 2000 and Windows is set to 1000, split the difference and choose 1500 for WASI to be safe.
This commit is contained in:
Brett Cannon 2022-11-01 15:51:05 -07:00 committed by GitHub
parent c0859743d9
commit 9711265182
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4 changed files with 7 additions and 0 deletions
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1
.gitignore vendored
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@ -116,6 +116,7 @@ PCbuild/win32/
Tools/unicode/data/
/autom4te.cache
/build/
/builddir/
/config.cache
/config.log
/config.status

2
Lib/test/test_marshal.py
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@ -260,6 +260,8 @@ class BugsTestCase(unittest.TestCase):
#if os.name == 'nt' and support.Py_DEBUG:
if os.name == 'nt':
MAX_MARSHAL_STACK_DEPTH = 1000
elif sys.platform == 'wasi':
MAX_MARSHAL_STACK_DEPTH = 1500
else:
MAX_MARSHAL_STACK_DEPTH = 2000
for i in range(MAX_MARSHAL_STACK_DEPTH - 2):

2
Misc/NEWS.d/next/Core and Builtins/2022-10-31-18-03-10.gh-issue-98925.zpdjVd.rst Normal file
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@ -0,0 +1,2 @@
Lower the recursion depth for marshal on WASI to support (in-development)
wasmtime 2.0.

2
Python/marshal.c
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@ -34,6 +34,8 @@ module marshal
*/
#if defined(MS_WINDOWS)
#define MAX_MARSHAL_STACK_DEPTH 1000
#elif defined(__wasi__)
#define MAX_MARSHAL_STACK_DEPTH 1500
#else
#define MAX_MARSHAL_STACK_DEPTH 2000
#endif