Make `TypeDescriptor` thread safe with custom providers by enlarging `lock` region #92521

karakasa · 2023-09-23T09:03:11Z

Summary

Fix #92394 and add a test.

see comment for the reason of race conditions.

The fix is conservative as it just extends the range of lock statement. If the performance decrease in this PR is acceptable, I would recommend enlarging lock region because it is unlikely to result in bugs.

I did code another aggressive approach (#92548) that minimizes lock use but it seems causing stack overflow in certain conditions so I'm not gonna PR that.

Risk

There would be performance impact due to the extended use of lock.

The bottleneck would be querying many to-be-created TypeDescriptionNodes at the same time - as they are forced to be created one by one - which may decrease startup perf. Otherwise the impact should be minimal because most queries quit at the first if block.

ghost · 2023-09-23T09:03:23Z

Tagging subscribers to this area: @dotnet/area-system-componentmodel
See info in area-owners.md if you want to be subscribed.

Issue Details

Fix #92394 and add a test.

Author:	karakasa
Assignees:	-
Labels:	`area-System.ComponentModel`
Milestone:	-

Originally a race condition exists in `CheckDefaultProvider` and leads to wrong results when many methods are called simultaneously. The PR fixes that by extending the lock statement. Fix dotnet#92934

to wrong results when many methods are called simultaneously. The PR fixes that by extending the lock statement. Fix dotnet#92394

steveharter · 2023-09-27T21:20:28Z

This touches the same files as the closed PR https://github.com/dotnet/runtime/pull/85156/files for issue #30024. It was closed since it didn't make sense to force this potentially risky issue late into v8.0. Both issues appear to be the same root cause around using the hashtable in s_defaultProviders, but have different use cases so it makes sense to keep open both issues for now.

Performance here will suffer quite a bit - because of the lock area expanding as well as the use of GetCustomAttributes(). The other PR should be used as a reference implementation to address perf, but there may be other ways to address the issues without the extensive changes there and added use the Environment.CurrentManagedThreadId.

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptor.cs

src/libraries/System.ComponentModel.TypeConverter/tests/ConcurrentTypeDescriptorTests.cs

steveharter · 2023-10-20T20:31:09Z

src/libraries/System.ComponentModel.TypeConverter/tests/ConcurrentTypeDescriptorTests.cs

+            public int OneProperty { get; set; }
+        }
+    }
+}


Do you think the tests at https://github.com/dotnet/runtime/pull/85156/files#diff-13f56d055c80679284090c59b45d396ab44378385c1f7ad0b597eec15fa5cf0fR813-R909 add any value here?

FWIW locally I added those tests to this file, and ran them in loop for 200 times are no issues were found.

The other tests are not fundamentally different - but I add them if they produce errors on your computer and they don't use Thread (compared to my tests), which is unsupported on browsers.

Nevertheless, both mine and the other tests failed on my PC. Can the issue be platform-specific?

test log

✘ System.ComponentModel.Tests.TypeDescriptorTests.GetConverterWithAddProvider_ByMultithread_Success(typeForGetConverter: typeof(System.ComponentModel.Tests.TypeDescriptorTests+MyClass), expectedConverterType: typeof(System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter))5ms Error: Assert.All() Failure: 1 out of 200 items in the collection did not pass. [2]: Item: System.ComponentModel.TypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Actual: System.ComponentModel.TypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 Stack trace: at System.ComponentModel.Tests.TypeDescriptorTests.GetConverterWithAddProvider_ByMultithread_Success(Type typeForGetConverter, Type expectedConverterType) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1370 at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state) in D:\repos\karakasa\runtime\src\libraries\System.Private.CoreLib\src\System\Threading\Tasks\Task.cs:line 1914 ✘ System.ComponentModel.Tests.TypeDescriptorTests.GetConverterWithAddProvider_ByMultithread_Success(typeForGetConverter: typeof(System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProvider), expectedConverterType: typeof(System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter))2ms Error: Assert.All() Failure: 11 out of 200 items in the collection did not pass. [11]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [10]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [9]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [8]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [7]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [6]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [5]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [4]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [3]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [2]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 [0]: Item: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter Xunit.Sdk.IsTypeException: Assert.IsType() Failure Expected: System.ComponentModel.Tests.TypeDescriptorTests+MyInheritedClassWithCustomTypeDescriptionProviderConverter Actual: System.ComponentModel.Tests.TypeDescriptorTests+MyTypeConverter at Xunit.Assert.IsType(Type expectedType, Object object) in /_/src/Microsoft.DotNet.XUnitAssert/src/TypeAsserts.cs:line 140 at System.ComponentModel.Tests.TypeDescriptorTests.<>c__DisplayClass80_0.<GetConverterWithAddProvider_ByMultithread_Success>b__0(TypeConverter currentConverter) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1371 at Xunit.Assert.<>c__DisplayClass11_0`1.<All>b__0(T item, Int32 index) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 40 at Xunit.Assert.All[T](IEnumerable`1 collection, Action`2 action) in /_/src/Microsoft.DotNet.XUnitAssert/src/CollectionAsserts.cs:line 69 Stack trace: at System.ComponentModel.Tests.TypeDescriptorTests.GetConverterWithAddProvider_ByMultithread_Success(Type typeForGetConverter, Type expectedConverterType) in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1370 at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state) in D:\repos\karakasa\runtime\src\libraries\System.Private.CoreLib\src\System\Threading\Tasks\Task.cs:line 1914 ✘ System.ComponentModel.Tests.TypeDescriptorTests.GetProperties_ReturnsExpected25ms Error: Fallback type descriptor is used. Possible race condition. Expected: False Actual: True Stack trace: at System.ComponentModel.Tests.TypeDescriptorTests.GetProperties_ReturnsExpected() in D:\repos\karakasa\runtime\src\libraries\System.ComponentModel.TypeConverter\tests\TypeDescriptorTests.cs:line 1287 at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor) at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args) in D:\repos\karakasa\runtime\src\coreclr\System.Private.CoreLib\src\System\Reflection\MethodBaseInvoker.CoreCLR.cs:line 36 at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr) in D:\repos\karakasa\runtime\src\libraries\System.Private.CoreLib\src\System\Reflection\MethodBaseInvoker.cs:line 57

steveharter

Left some comments in the test file.

steveharter · 2023-10-23T13:59:35Z

Note the PR is still marked as Draft.

karakasa · 2023-10-25T06:14:26Z

Note the PR is still marked as Draft.

I am testing on adding another HashTable to reduce lock. Will mark the PR as ready once I decide whether to add the extra hashtable. Do you have thoughts on this?

I will also check the extra tests, thank you.

public sealed class TypeDescriptor
{

....

    private static readonly Hashtable s_defaultProviders = new Hashtable();
    private static readonly Hashtable s_defaultProvidersCreated = new Hashtable();

....

    private static void CheckDefaultProvider(Type type)
    {
        bool providerAdded = false;
    
        if (s_defaultProvidersCreated.ContainsKey(type))
        {
            return;
        }
    
        lock (s_internalSyncObject)
        {
            if (s_defaultProviders.ContainsKey(type))
            {
                return;
            }
    
            object[] attrs = type.GetCustomAttributes(typeof(TypeDescriptionProviderAttribute), false);
            for (int idx = attrs.Length - 1; idx >= 0; idx--)
            {
                ....
            }
    
            s_defaultProvidersCreated[type] = null;
        }
    
        ....
    }

....

}

Moved tests to the main testing file Adopted tests from dotnet#85156 Co-authored-by: Maximys <mixim33@yandex.ru>

karakasa · 2023-11-15T15:20:25Z

latest benchmark with an extra hashtable to reduce locks. The perf is on par with the main repo.

BenchmarkDotNet v0.13.8, Windows 10 (10.0.19045.2546/22H2/2022Update)
Intel Core i7-8700K CPU 3.70GHz (Coffee Lake), 1 CPU, 12 logical and 6 physical cores
.NET SDK 8.0.100-rc.2.23502.2
  [Host]     : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
  Job-IOOUIL : .NET 9.0.0 (42.42.42.42424), X64 RyuJIT AVX2
  Job-QTNBWJ : .NET 9.0.0 (42.42.42.42424), X64 RyuJIT AVX2

Method	Toolchain	Mean	Error	StdDev	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
MultipleThreads	main	1,987.632 μs	14.8732 μs	13.9124 μs	1.00	35.1563	7.8125	7.8125	10.39 KB	1.00
MultipleThreads	pr	1,959.046 μs	21.4355 μs	20.0508 μs	0.99	35.1563	7.8125	7.8125	10.39 KB	1.00

SingleThread	main	5.042 μs	0.0173 μs	0.0145 μs	1.00	0.3052	-	-	1.92 KB	1.00
SingleThread	pr	5.061 μs	0.0664 μs	0.0621 μs	1.00	0.3052	-	-	1.92 KB	1.00

ConcurrentGetProperties_ReturnsExpected is skipped on browsers because Thread.Start is unsupported.

ericstj · 2023-12-12T18:18:41Z

Before seeing this PR I happened to be looking at this problem and made a suggestion in #30024. I think that suggestion could be considered here as a slight alternative to what's been implemented so far.

steveharter · 2024-01-11T15:44:52Z

Replaced by #96846 so we can apply the sentinel pattern mentioned in #30024

karakasa added 5 commits September 23, 2023 15:57

minimal entirety lock to fix bug

56fd769

remove unused code

47d9fe6

minimize lock range

7b743c3

add test

ba1e176

fix code style

49aef1a

dotnet-issue-labeler bot added the area-System.ComponentModel label Sep 23, 2023

ghost added the community-contribution Indicates that the PR has been added by a community member label Sep 23, 2023

karakasa changed the title ~~Make TypeDescriptor.GetProperties thread safe~~ Make TypeDescriptor thread safe Sep 23, 2023

karakasa changed the title ~~Make TypeDescriptor thread safe~~ Make TypeDescriptor thread safe with custom providers Sep 23, 2023

karakasa added 2 commits September 23, 2023 18:22

Make TypeDescriptor thread safe with custom providers

a8a259c

Originally a race condition exists in `CheckDefaultProvider` and leads to wrong results when many methods are called simultaneously. The PR fixes that by extending the lock statement. Fix dotnet#92934

Originally a race condition exists in CheckDefaultProvider and leads

e4c4296

to wrong results when many methods are called simultaneously. The PR fixes that by extending the lock statement. Fix dotnet#92394

karakasa marked this pull request as ready for review September 23, 2023 10:50

karakasa mentioned this pull request Sep 24, 2023

Make TypeDescriptor thread safe with custom providers and minimize lock use #92548

Closed

karakasa changed the title ~~Make TypeDescriptor thread safe with custom providers~~ Make TypeDescriptor thread safe with custom providers by enlaring lock region Sep 24, 2023

karakasa changed the title ~~Make TypeDescriptor thread safe with custom providers by enlaring lock region~~ Make TypeDescriptor thread safe with custom providers by enlarging lock region Sep 24, 2023

steveharter self-requested a review September 27, 2023 21:21

steveharter reviewed Sep 27, 2023

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src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptor.cs Show resolved Hide resolved

karakasa marked this pull request as draft September 28, 2023 03:24

karakasa marked this pull request as ready for review September 29, 2023 05:25

karakasa marked this pull request as draft October 20, 2023 01:37

steveharter reviewed Oct 20, 2023

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src/libraries/System.ComponentModel.TypeConverter/tests/ConcurrentTypeDescriptorTests.cs Outdated Show resolved Hide resolved

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ghost added the needs-author-action An issue or pull request that requires more info or actions from the author. label Oct 20, 2023

ghost removed the needs-author-action An issue or pull request that requires more info or actions from the author. label Oct 25, 2023

steveharter mentioned this pull request Oct 26, 2023

TypeDescriptor.GetProperties(object instance) is not thread-safe #92394

Closed

karakasa and others added 2 commits November 15, 2023 22:47

Added another HashTable to reduce locks.

8a7df35

Moved tests to the main testing file Adopted tests from dotnet#85156 Co-authored-by: Maximys <mixim33@yandex.ru>

better test names

0e3fc99

karakasa added 3 commits November 15, 2023 23:22

improve comments

b067518

renamed variable

c55d876

reverted sln file

8707cd9

karakasa marked this pull request as ready for review November 15, 2023 16:10

karakasa marked this pull request as draft November 16, 2023 02:21

Skip one test on browsers

33d5a3e

ConcurrentGetProperties_ReturnsExpected is skipped on browsers because Thread.Start is unsupported.

karakasa marked this pull request as ready for review November 16, 2023 03:59

karakasa requested a review from steveharter November 16, 2023 05:34

build-analysis bot mentioned this pull request Nov 16, 2023

[wasm] Unhandled System.PlatformNotSupportedException for crypto tests #94820

Closed

ericstj assigned steveharter Dec 12, 2023

ericstj mentioned this pull request Dec 12, 2023

Concurrency issue in TypeDescriptor.GetConverter(type) #30024

Closed

steveharter mentioned this pull request Jan 11, 2024

Fix concurrency issue in TypeDescriptor GetProperties() and GetConverter() #96846

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Make `TypeDescriptor` thread safe with custom providers by enlarging `lock` region #92521

Make `TypeDescriptor` thread safe with custom providers by enlarging `lock` region #92521

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Make TypeDescriptor thread safe with custom providers by enlarging lock region #92521

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Make `TypeDescriptor` thread safe with custom providers by enlarging `lock` region #92521

Make `TypeDescriptor` thread safe with custom providers by enlarging `lock` region #92521

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