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Commit645687e

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do not eat all exceptions when trying to add CLR reference, provide more info when CLR assemblies are failed to be loaded
1. When trying to implicitly load assemblies, and that fails NOT because an assembly is missing, but because loading failed for some reason, emit Python warning.2. When trying to import a module in our import hook, if the module name is an assembly name, and we fail to load it, and Python also fails to find a module with the same name, add the exceptions we got during the attempt to load it into __cause__ of the final ImportErrorBREAKING: clr.AddReference will now throw exceptions besides FileNotFoundException.Additional: a few uses of BorrowedReferenceThis addressespythonnet#261It is an alternative topythonnet#298
1 parent9fd877e commit645687e

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9 files changed

+99
-71
lines changed

9 files changed

+99
-71
lines changed

‎src/embed_tests/pyimport.cs‎

Lines changed: 25 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -38,8 +38,8 @@ public void SetUp()
3838
stringtestPath=Path.Combine(TestContext.CurrentContext.TestDirectory,s);
3939

4040
IntPtrstr=Runtime.Runtime.PyString_FromString(testPath);
41-
IntPtrpath=Runtime.Runtime.PySys_GetObject("path");
42-
Runtime.Runtime.PyList_Append(newBorrowedReference(path),str);
41+
BorrowedReferencepath=Runtime.Runtime.PySys_GetObject("path");
42+
Runtime.Runtime.PyList_Append(path,str);
4343
}
4444

4545
[TearDown]
@@ -83,5 +83,28 @@ public void TestCastGlobalVar()
8383
Assert.AreEqual("2",foo.FOO.ToString());
8484
Assert.AreEqual("2",foo.test_foo().ToString());
8585
}
86+
87+
[Test]
88+
publicvoidBadAssembly()
89+
{
90+
stringpath;
91+
if(Python.Runtime.Runtime.IsWindows)
92+
{
93+
path=@"C:\Windows\System32\kernel32.dll";
94+
}
95+
else
96+
{
97+
Assert.Pass("TODO: add bad assembly location for other platforms");
98+
return;
99+
}
100+
101+
stringcode=$@"
102+
import clr
103+
clr.AddReference('{path}')
104+
";
105+
106+
varerror=Assert.Throws<PythonException>(()=>PythonEngine.Exec(code));
107+
Assert.AreEqual(nameof(FileLoadException),error.PythonTypeName);
108+
}
86109
}
87110
}

‎src/runtime/assemblymanager.cs‎

Lines changed: 25 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -137,7 +137,7 @@ private static Assembly ResolveHandler(object ob, ResolveEventArgs args)
137137
/// </summary>
138138
internalstaticvoidUpdatePath()
139139
{
140-
IntPtrlist=Runtime.PySys_GetObject("path");
140+
BorrowedReferencelist=Runtime.PySys_GetObject("path");
141141
varcount=Runtime.PyList_Size(list);
142142
if(count!=pypath.Count)
143143
{
@@ -199,19 +199,14 @@ public static string FindAssembly(string name)
199199
/// </summary>
200200
publicstaticAssemblyLoadAssembly(stringname)
201201
{
202-
Assemblyassembly=null;
203202
try
204203
{
205-
assembly=Assembly.Load(name);
204+
returnAssembly.Load(name);
206205
}
207-
catch(Exception)
206+
catch(FileNotFoundException)
208207
{
209-
//if (!(e is System.IO.FileNotFoundException))
210-
//{
211-
// throw;
212-
//}
208+
returnnull;
213209
}
214-
returnassembly;
215210
}
216211

217212

@@ -221,18 +216,8 @@ public static Assembly LoadAssembly(string name)
221216
publicstaticAssemblyLoadAssemblyPath(stringname)
222217
{
223218
stringpath=FindAssembly(name);
224-
Assemblyassembly=null;
225-
if(path!=null)
226-
{
227-
try
228-
{
229-
assembly=Assembly.LoadFrom(path);
230-
}
231-
catch(Exception)
232-
{
233-
}
234-
}
235-
returnassembly;
219+
if(path==null)returnnull;
220+
returnAssembly.LoadFrom(path);
236221
}
237222

238223
/// <summary>
@@ -242,25 +227,18 @@ public static Assembly LoadAssemblyPath(string name)
242227
/// <returns></returns>
243228
publicstaticAssemblyLoadAssemblyFullPath(stringname)
244229
{
245-
Assemblyassembly=null;
246230
if(Path.IsPathRooted(name))
247231
{
248-
if(!Path.HasExtension(name))
232+
if(!Path.HasExtension(name)&&Runtime.InteropVersion<newVersion(3,0))
249233
{
250234
name=name+".dll";
251235
}
252236
if(File.Exists(name))
253237
{
254-
try
255-
{
256-
assembly=Assembly.LoadFrom(name);
257-
}
258-
catch(Exception)
259-
{
260-
}
238+
returnAssembly.LoadFrom(name);
261239
}
262240
}
263-
returnassembly;
241+
returnnull;
264242
}
265243

266244
/// <summary>
@@ -291,7 +269,7 @@ public static Assembly FindLoadedAssembly(string name)
291269
/// actually loads an assembly.
292270
/// Call ONLY for namespaces that HAVE NOT been cached yet.
293271
/// </remarks>
294-
publicstaticboolLoadImplicit(stringname,boolwarn=true)
272+
publicstaticboolLoadImplicit(stringname,Action<Exception>assemblyLoadErrorHandler,boolwarn=true)
295273
{
296274
string[]names=name.Split('.');
297275
varloaded=false;
@@ -308,14 +286,23 @@ public static bool LoadImplicit(string name, bool warn = true)
308286
assembliesSet=newHashSet<Assembly>(AppDomain.CurrentDomain.GetAssemblies());
309287
}
310288
Assemblya=FindLoadedAssembly(s);
311-
if(a==null)
312-
{
313-
a=LoadAssemblyPath(s);
314-
}
315-
if(a==null)
289+
try
316290
{
317-
a=LoadAssembly(s);
291+
if(a==null)
292+
{
293+
a=LoadAssemblyPath(s);
294+
}
295+
296+
if(a==null)
297+
{
298+
a=LoadAssembly(s);
299+
}
318300
}
301+
catch(FileLoadExceptione){assemblyLoadErrorHandler(e);}
302+
catch(BadImageFormatExceptione){assemblyLoadErrorHandler(e);}
303+
catch(System.Security.SecurityExceptione){assemblyLoadErrorHandler(e);}
304+
catch(PathTooLongExceptione){assemblyLoadErrorHandler(e);}
305+
319306
if(a!=null&&!assembliesSet.Contains(a))
320307
{
321308
loaded=true;

‎src/runtime/exceptions.cs‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -256,9 +256,9 @@ public static void SetError(IntPtr ob, string value)
256256
/// Sets the current Python exception given a Python object.
257257
/// This is a wrapper for the Python PyErr_SetObject call.
258258
/// </remarks>
259-
publicstaticvoidSetError(IntPtrob,IntPtrvalue)
259+
publicstaticvoidSetError(IntPtrtype,IntPtrexceptionObject)
260260
{
261-
Runtime.PyErr_SetObject(ob,value);
261+
Runtime.PyErr_SetObject(newBorrowedReference(type),newBorrowedReference(exceptionObject));
262262
}
263263

264264
/// <summary>
@@ -288,7 +288,7 @@ public static void SetError(Exception e)
288288

289289
IntPtrop=CLRObject.GetInstHandle(e);
290290
IntPtretype=Runtime.PyObject_GetAttrString(op,"__class__");
291-
Runtime.PyErr_SetObject(etype,op);
291+
Runtime.PyErr_SetObject(newBorrowedReference(etype),newBorrowedReference(op));
292292
Runtime.XDecref(etype);
293293
Runtime.XDecref(op);
294294
}

‎src/runtime/importhook.cs‎

Lines changed: 19 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,5 @@
11
usingSystem;
2+
usingSystem.Collections.Generic;
23
usingSystem.Runtime.InteropServices;
34

45
namespacePython.Runtime
@@ -238,22 +239,12 @@ public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw)
238239
// Check these BEFORE the built-in import runs; may as well
239240
// do the Incref()ed return here, since we've already found
240241
// the module.
241-
if(mod_name=="clr")
242+
if(mod_name=="clr"||mod_name=="CLR")
242243
{
243-
IntPtrclr_module=GetCLRModule(fromList);
244-
if(clr_module!=IntPtr.Zero)
244+
if(mod_name=="CLR")
245245
{
246-
IntPtrsys_modules=Runtime.PyImport_GetModuleDict();
247-
if(sys_modules!=IntPtr.Zero)
248-
{
249-
Runtime.PyDict_SetItemString(sys_modules,"clr",clr_module);
250-
}
246+
Exceptions.deprecation("The CLR module is deprecated. Please use 'clr'.");
251247
}
252-
returnclr_module;
253-
}
254-
if(mod_name=="CLR")
255-
{
256-
Exceptions.deprecation("The CLR module is deprecated. Please use 'clr'.");
257248
IntPtrclr_module=GetCLRModule(fromList);
258249
if(clr_module!=IntPtr.Zero)
259250
{
@@ -265,9 +256,10 @@ public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw)
265256
}
266257
returnclr_module;
267258
}
259+
268260
stringrealname=mod_name;
269261
stringclr_prefix=null;
270-
if(mod_name.StartsWith("CLR."))
262+
if(mod_name.StartsWith("CLR.")&&Runtime.InteropVersion<newVersion(3,0))
271263
{
272264
clr_prefix="CLR.";// prepend when adding the module to sys.modules
273265
realname=mod_name.Substring(4);
@@ -328,11 +320,22 @@ public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw)
328320
AssemblyManager.UpdatePath();
329321
if(!AssemblyManager.IsValidNamespace(realname))
330322
{
331-
if(!AssemblyManager.LoadImplicit(realname))
323+
varloadExceptions=newList<Exception>();
324+
if(!AssemblyManager.LoadImplicit(realname,assemblyLoadErrorHandler:loadExceptions.Add))
332325
{
333326
// May be called when a module being imported imports a module.
334327
// In particular, I've seen decimal import copy import org.python.core
335-
returnRuntime.PyObject_Call(py_import,args,kw);
328+
IntPtrimportResult=Runtime.PyObject_Call(py_import,args,kw);
329+
// TODO: use ModuleNotFoundError in Python 3.6+
330+
if(importResult==IntPtr.Zero&&loadExceptions.Count>0
331+
&&Exceptions.ExceptionMatches(Exceptions.ImportError))
332+
{
333+
loadExceptions.Add(newPythonException());
334+
varimportError=newPyObject(newBorrowedReference(Exceptions.ImportError));
335+
importError.SetAttr("__cause__",newAggregateException(loadExceptions).ToPython());
336+
Runtime.PyErr_SetObject(newBorrowedReference(Exceptions.ImportError),importError.Reference);
337+
}
338+
returnimportResult;
336339
}
337340
}
338341

‎src/runtime/methodbinder.cs‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -291,8 +291,8 @@ internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, Meth
291291
IntPtrvalueList=Runtime.PyDict_Values(kw);
292292
for(inti=0;i<pynkwargs;++i)
293293
{
294-
varkeyStr=Runtime.GetManagedString(Runtime.PyList_GetItem(keylist,i));
295-
kwargDict[keyStr]=Runtime.PyList_GetItem(valueList,i).DangerousGetAddress();
294+
varkeyStr=Runtime.GetManagedString(Runtime.PyList_GetItem(newBorrowedReference(keylist),i));
295+
kwargDict[keyStr]=Runtime.PyList_GetItem(newBorrowedReference(valueList),i).DangerousGetAddress();
296296
}
297297
Runtime.XDecref(keylist);
298298
Runtime.XDecref(valueList);

‎src/runtime/moduleobject.cs‎

Lines changed: 7 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -119,7 +119,7 @@ public ManagedType GetAttribute(string name, bool guess)
119119
// cost. Ask the AssemblyManager to do implicit loading for each
120120
// of the steps in the qualified name, then try it again.
121121
boolignore=name.StartsWith("__");
122-
if(AssemblyManager.LoadImplicit(qname,!ignore))
122+
if(AssemblyManager.LoadImplicit(qname,assemblyLoadErrorHandler:ImportWarning,!ignore))
123123
{
124124
if(AssemblyManager.IsValidNamespace(qname))
125125
{
@@ -161,6 +161,11 @@ public ManagedType GetAttribute(string name, bool guess)
161161
returnnull;
162162
}
163163

164+
staticvoidImportWarning(Exceptionexception)
165+
{
166+
Exceptions.warn(exception.ToString(),Exceptions.ImportWarning);
167+
}
168+
164169

165170
/// <summary>
166171
/// Stores an attribute in the instance dict for future lookups.
@@ -365,7 +370,7 @@ internal void InitializePreload()
365370
if(interactive_preload)
366371
{
367372
interactive_preload=false;
368-
if(Runtime.PySys_GetObject("ps1")!=IntPtr.Zero)
373+
if(Runtime.PySys_GetObject("ps1").IsNull)
369374
{
370375
preload=true;
371376
}

‎src/runtime/pylist.cs‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -22,6 +22,11 @@ public PyList(IntPtr ptr) : base(ptr)
2222
{
2323
}
2424

25+
/// <summary>
26+
/// Creates new <see cref="PyList"/> pointing to the same object, as the given reference.
27+
/// </summary>
28+
internalPyList(BorrowedReferencereference):base(reference){}
29+
2530

2631
/// <summary>
2732
/// PyList Constructor

‎src/runtime/pysequence.cs‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -16,6 +16,8 @@ protected PySequence(IntPtr ptr) : base(ptr)
1616
{
1717
}
1818

19+
internalPySequence(BorrowedReferencereference):base(reference){}
20+
1921
protectedPySequence()
2022
{
2123
}

‎src/runtime/runtime.cs‎

Lines changed: 11 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -111,6 +111,9 @@ public class Runtime
111111
// .NET core: System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
112112
internalstaticboolIsWindows=Environment.OSVersion.Platform==PlatformID.Win32NT;
113113

114+
internalstaticVersionInteropVersion{get;}
115+
=System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
116+
114117
staticreadonlyDictionary<string,OperatingSystemType>OperatingSystemTypeMapping=newDictionary<string,OperatingSystemType>()
115118
{
116119
{"Windows",OperatingSystemType.Windows},
@@ -339,9 +342,9 @@ internal static void Initialize(bool initSigs = false)
339342
// Need to add the runtime directory to sys.path so that we
340343
// can find built-in assemblies like System.Data, et. al.
341344
stringrtdir=RuntimeEnvironment.GetRuntimeDirectory();
342-
IntPtrpath=PySys_GetObject("path");
345+
BorrowedReferencepath=PySys_GetObject("path");
343346
IntPtritem=PyString_FromString(rtdir);
344-
PyList_Append(newBorrowedReference(path),item);
347+
PyList_Append(path,item);
345348
XDecref(item);
346349
AssemblyManager.UpdatePath();
347350
}
@@ -1642,13 +1645,13 @@ internal static IntPtr PyList_New(long size)
16421645
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
16431646
internalstaticextern IntPtr PyList_AsTuple(IntPtr pointer);
16441647

1645-
internalstatic BorrowedReference PyList_GetItem(IntPtr pointer,long index)
1648+
internalstatic BorrowedReference PyList_GetItem(BorrowedReference pointer,long index)
16461649
{
16471650
return PyList_GetItem(pointer,new IntPtr(index));
16481651
}
16491652

16501653
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
1651-
privatestaticextern BorrowedReference PyList_GetItem(IntPtr pointer, IntPtr index);
1654+
privatestaticextern BorrowedReference PyList_GetItem(BorrowedReference pointer, IntPtr index);
16521655

16531656
internalstaticint PyList_SetItem(IntPtr pointer,long index, IntPtr value)
16541657
{
@@ -1691,13 +1694,13 @@ internal static int PyList_SetSlice(IntPtr pointer, long start, long end, IntPtr
16911694
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
16921695
privatestaticexternint PyList_SetSlice(IntPtr pointer, IntPtr start, IntPtr end, IntPtr value);
16931696

1694-
internalstaticlong PyList_Size(IntPtr pointer)
1697+
internalstaticlong PyList_Size(BorrowedReference pointer)
16951698
{
16961699
return(long)_PyList_Size(pointer);
16971700
}
16981701

16991702
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl, EntryPoint= "PyList_Size")]
1700-
privatestaticextern IntPtr _PyList_Size(IntPtr pointer);
1703+
privatestaticextern IntPtr _PyList_Size(BorrowedReference pointer);
17011704

17021705
//====================================================================
17031706
// Python tuple API
@@ -1825,7 +1828,7 @@ int updatepath
18251828
#endif
18261829

18271830
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
1828-
internalstaticexternIntPtr PySys_GetObject(string name);
1831+
internalstaticexternBorrowedReference PySys_GetObject(string name);
18291832

18301833
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
18311834
internalstaticexternint PySys_SetObject(string name, IntPtr ob);
@@ -1923,7 +1926,7 @@ internal static IntPtr PyMem_Realloc(IntPtr ptr, long size)
19231926
internalstaticexternvoid PyErr_SetString(IntPtr ob,string message);
19241927

19251928
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
1926-
internalstaticexternvoid PyErr_SetObject(IntPtr ob, IntPtr message);
1929+
internalstaticexternvoid PyErr_SetObject(BorrowedReference type, BorrowedReference exceptionObject);
19271930

19281931
[DllImport(_PythonDll, CallingConvention= CallingConvention.Cdecl)]
19291932
internalstaticextern IntPtr PyErr_SetFromErrno(IntPtr ob);

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