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Fix exception refcnt by BadSingleton · Pull Request #1402 · pythonnet/pythonnet · GitHub
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Fix exception refcnt #1402

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BadSingleton wants to merge 6 commits into from
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Fix exception refcnt #1402

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ee30c94
Fix a ref count issue in PythonException
BadSingleton Feb 11, 2021
480a549
Fixes a leak in ExceptionClassObject
BadSingleton Feb 26, 2021
5ea9c3c
Code review fixes
BadSingleton Mar 4, 2021
891ad8c
code review fixes
BadSingleton Mar 5, 2021
d180f2a
kick the build
BadSingleton Mar 8, 2021
47290ee
kick the build, again
BadSingleton Mar 8, 2021
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Code review fixes
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@BadSingleton
BadSingleton committed Mar 4, 2021
commit 5ea9c3ca63ecbaf8a6c39142a4d0fb73b006918c
2 changes: 1 addition & 1 deletion src/runtime/clrobject.cs
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Expand Up @@ -106,7 +106,7 @@ protected override void OnLoad(InterDomainContext context)

public override string ToString()
{
return $"<CLRObject wrapping {inst}>";
return $"<CLRObject: {inst}>";
}
}
}
19 changes: 5 additions & 14 deletions src/runtime/exceptions.cs
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Expand Up @@ -89,7 +89,8 @@ internal static Exception ToException(IntPtr ob)
static void ClearOffsetHelper(IntPtr ob, int offset)
{
var field = Marshal.ReadIntPtr(ob, offset);
Runtime.Py_CLEAR(ref field);
Runtime.XDecref(field);
Marshal.WriteIntPtr(ob, offset, IntPtr.Zero);
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}
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// As seen in exceptions.c, every derived type must also clean the base.
Expand Down Expand Up @@ -200,19 +201,9 @@ internal static void SetArgsAndCause(IntPtr ob)

if (e.InnerException != null)
{
if(e.InnerException is PythonException)
{
// If the error is a Python exception, write the real one
var pyerr = (e.InnerException as PythonException);
Runtime.XIncref(pyerr.PyValue);
Runtime.PyException_SetCause(ob, pyerr.PyValue);
}
else
{
// Note: For an AggregateException, InnerException is only the first of the InnerExceptions.
IntPtr cause = CLRObject.GetInstHandle(e.InnerException);
Runtime.PyException_SetCause(ob, cause);
}
// Note: For an AggregateException, InnerException is only the first of the InnerExceptions.
IntPtr cause = CLRObject.GetInstHandle(e.InnerException);
Runtime.PyException_SetCause(ob, cause);
}
}

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3 changes: 2 additions & 1 deletion tests/test_exceptions.py
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Expand Up @@ -429,7 +429,8 @@ def do_test_leak():
orig_exc = {x for x in get_all_objects() if isinstance(x, Exception)}
func()
exc = {x for x in get_all_objects() if isinstance(x, Exception)}
assert not exc - orig_exc
possibly_leaked = exc - orig_exc
assert not possibly_leaked

return do_test_leak

Expand Down