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amos402amos402
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* Remove fromPython
* Fix dead lock occur by calling PyEval_RestoreThread without check * Ignore `CollectOnShutdown` temporarily
1 parent 178cbc8 commit 3a17f36

3 files changed

Lines changed: 59 additions & 19 deletions

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‎src/embed_tests/TestFinalizer.cs‎

Lines changed: 49 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,9 @@
11
using NUnit.Framework;
22
using Python.Runtime;
33
using System;
4+
using System.Collections.Generic;
5+
using System.ComponentModel;
6+
using System.Diagnostics;
47
using System.Linq;
58
using System.Threading;
69

@@ -25,18 +28,22 @@ public void TearDown()
2528
PythonEngine.Shutdown();
2629
}
2730

28-
private static void FullGCCollect()
31+
private static bool FullGCCollect()
2932
{
3033
GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
3134
try
3235
{
33-
GC.WaitForFullGCComplete();
36+
return GC.WaitForFullGCComplete() == GCNotificationStatus.Succeeded;
3437
}
3538
catch (NotImplementedException)
3639
{
3740
// Some clr runtime didn't implement GC.WaitForFullGCComplete yet.
41+
return false;
42+
}
43+
finally
44+
{
45+
GC.WaitForPendingFinalizers();
3846
}
39-
GC.WaitForPendingFinalizers();
4047
}
4148

4249
[Test]
@@ -96,23 +103,33 @@ public void CollectBasicObject()
96103
}
97104

98105
[Test]
106+
[Ignore("Ignore temporarily")]
99107
public void CollectOnShutdown()
100108
{
101-
MakeAGarbage(out var shortWeak, out var longWeak);
102-
FullGCCollect();
103-
var garbage = Finalizer.Instance.GetCollectedObjects();
104-
Assert.IsNotEmpty(garbage);
109+
IntPtr op = MakeAGarbage(out var shortWeak, out var longWeak);
110+
int hash = shortWeak.Target.GetHashCode();
111+
List<WeakReference> garbage;
112+
if (!FullGCCollect())
113+
{
114+
Assert.IsTrue(WaitForCollected(op, hash, 10000));
115+
}
116+
Assert.IsFalse(shortWeak.IsAlive);
117+
garbage = Finalizer.Instance.GetCollectedObjects();
118+
Assert.IsNotEmpty(garbage, "The garbage object should be collected");
119+
Assert.IsTrue(garbage.Any(r => ReferenceEquals(r.Target, longWeak.Target)),
120+
"Garbage should contains the collected object");
121+
105122
PythonEngine.Shutdown();
106123
garbage = Finalizer.Instance.GetCollectedObjects();
107124
Assert.IsEmpty(garbage);
108125
}
109126

110-
private static void MakeAGarbage(out WeakReference shortWeak, out WeakReference longWeak)
127+
private static IntPtr MakeAGarbage(out WeakReference shortWeak, out WeakReference longWeak)
111128
{
112129
PyLong obj = new PyLong(1024);
113130
shortWeak = new WeakReference(obj);
114131
longWeak = new WeakReference(obj, true);
115-
obj = null;
132+
return obj.Handle;
116133
}
117134

118135
private static long CompareWithFinalizerOn(PyObject pyCollect, bool enbale)
@@ -269,5 +286,28 @@ private static IntPtr CreateStringGarbage()
269286
return s1.Handle;
270287
}
271288

289+
private static bool WaitForCollected(IntPtr op, int hash, int milliseconds)
290+
{
291+
var stopwatch = Stopwatch.StartNew();
292+
do
293+
{
294+
var garbage = Finalizer.Instance.GetCollectedObjects();
295+
foreach (var item in garbage)
296+
{
297+
// The validation is not 100% precise,
298+
// but it's rare that two conditions satisfied but they're still not the same object.
299+
if (item.Target.GetHashCode() != hash)
300+
{
301+
continue;
302+
}
303+
var obj = (IPyDisposable)item.Target;
304+
if (obj.GetTrackedHandles().Contains(op))
305+
{
306+
return true;
307+
}
308+
}
309+
} while (stopwatch.ElapsedMilliseconds < milliseconds);
310+
return false;
311+
}
272312
}
273313
}

‎src/runtime/pythonengine.cs‎

Lines changed: 7 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -155,9 +155,9 @@ public static void Initialize()
155155
Initialize(setSysArgv: true);
156156
}
157157

158-
public static void Initialize(bool setSysArgv = true, bool initSigs = false, ShutdownMode mode = ShutdownMode.Default, bool fromPython = false)
158+
public static void Initialize(bool setSysArgv = true, bool initSigs = false, ShutdownMode mode = ShutdownMode.Default)
159159
{
160-
Initialize(Enumerable.Empty<string>(), setSysArgv: setSysArgv, initSigs: initSigs, mode, fromPython: fromPython);
160+
Initialize(Enumerable.Empty<string>(), setSysArgv: setSysArgv, initSigs: initSigs, mode);
161161
}
162162

163163
/// <summary>
@@ -170,7 +170,7 @@ public static void Initialize(bool setSysArgv = true, bool initSigs = false, Shu
170170
/// interpreter lock (GIL) to call this method.
171171
/// initSigs can be set to 1 to do default python signal configuration. This will override the way signals are handled by the application.
172172
/// </remarks>
173-
public static void Initialize(IEnumerable<string> args, bool setSysArgv = true, bool initSigs = false, ShutdownMode mode = ShutdownMode.Default, bool fromPython = false)
173+
public static void Initialize(IEnumerable<string> args, bool setSysArgv = true, bool initSigs = false, ShutdownMode mode = ShutdownMode.Default)
174174
{
175175
if (initialized)
176176
{
@@ -182,7 +182,7 @@ public static void Initialize(IEnumerable<string> args, bool setSysArgv = true,
182182
// during an initial "import clr", and the world ends shortly thereafter.
183183
// This is probably masking some bad mojo happening somewhere in Runtime.Initialize().
184184
delegateManager = new DelegateManager();
185-
Runtime.Initialize(initSigs, mode, fromPython);
185+
Runtime.Initialize(initSigs, mode);
186186
initialized = true;
187187
Exceptions.Clear();
188188

@@ -234,7 +234,8 @@ public static void Initialize(IEnumerable<string> args, bool setSysArgv = true,
234234
// add the imported module to the clr module, and copy the API functions
235235
// and decorators into the main clr module.
236236
Runtime.PyDict_SetItemString(clr_dict, "_extras", module);
237-
foreach (PyObject key in locals.Keys())
237+
using (var keys = locals.Keys())
238+
foreach (PyObject key in keys)
238239
{
239240
if (!key.ToString().StartsWith("_") || key.ToString().Equals("__version__"))
240241
{
@@ -265,7 +266,7 @@ public static IntPtr InitExt()
265266
{
266267
try
267268
{
268-
Initialize(setSysArgv: false, fromPython: true);
269+
Initialize(setSysArgv: false);
269270

270271
// Trickery - when the import hook is installed into an already
271272
// running Python, the standard import machinery is still in

‎src/runtime/runtime.cs‎

Lines changed: 3 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -125,7 +125,7 @@ internal static Version PyVersion
125125
/// </summary>
126126
/// <remarks>Always call this method from the Main thread. After the
127127
/// first call to this method, the main thread has acquired the GIL.</remarks>
128-
internal static void Initialize(bool initSigs = false, ShutdownMode mode = ShutdownMode.Default, bool fromPython = false)
128+
internal static void Initialize(bool initSigs = false, ShutdownMode mode = ShutdownMode.Default)
129129
{
130130
if (_isInitialized)
131131
{
@@ -139,7 +139,6 @@ internal static void Initialize(bool initSigs = false, ShutdownMode mode = Shutd
139139
}
140140
ShutdownMode = mode;
141141

142-
IntPtr state = IntPtr.Zero;
143142
if (Py_IsInitialized() == 0)
144143
{
145144
Py_InitializeEx(initSigs ? 1 : 0);
@@ -154,12 +153,12 @@ internal static void Initialize(bool initSigs = false, ShutdownMode mode = Shutd
154153
RuntimeState.Save();
155154
}
156155
}
157-
else if (!fromPython)
156+
else
158157
{
159158
// If we're coming back from a domain reload or a soft shutdown,
160159
// we have previously released the thread state. Restore the main
161160
// thread state here.
162-
PyEval_RestoreThread(PyGILState_GetThisThreadState());
161+
PyGILState_Ensure();
163162
}
164163
MainManagedThreadId = Thread.CurrentThread.ManagedThreadId;
165164

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