Merge pull request #4240 from LLITCHEV/Issue4147

Add test for issue 4115.

4 files changed, 259 insertions, 0 deletions

diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.cs b/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.cs
new file mode 100644
index 0000000000..bfe14cc037
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.cs
@@ -0,0 +1,146 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+// This test could fail in GCStress=0xC case, if the object movement happens at the right place and time.
+// If the GC guarantees object movement at every collection, the case will fail in that GC stress mode always.
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Issue_4115
+{
+    public class MyClass
+    {
+        private GCHandle _pinHandle;
+        private IntPtr _dataArrayPtr;
+        public ArraySegment<byte> Data;
+        public MyClass()
+        {
+        }
+
+        public object Obj { get; private set; }
+        public byte[] Array => Data.Array;
+        public int Start { get; set; }
+        public int End { get; set; }
+        public MyClass Next { get; set; }
+    }
+
+    public struct MyIterator
+    {
+        private static readonly int _vectorSpan = 100;
+
+        private MyClass _class;
+
+        private int _index;
+
+        public bool IsDefault
+        {
+            get
+            {
+                return this._class == null;
+            }
+        }
+
+        public bool IsEnd
+        {
+            get
+            {
+                if (this._class == null) {
+                    return true;
+                }
+                if (this._index < this._class.End) {
+                    return false;
+                }
+                for (MyClass next = this._class.Next; next != null; next = next.Next) {
+                    if (next.Start < next.End) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+        }
+
+        public MyClass Class
+        {
+            get
+            {
+                return this._class;
+            }
+        }
+
+        public int Index
+        {
+            get
+            {
+                return this._index;
+            }
+        }
+
+        public MyIterator(MyClass clazz)
+        {
+            this._class = clazz;
+            MyClass expr_0E = this._class;
+            this._index = ((expr_0E != null) ? expr_0E.Start : 0);
+        }
+
+        public MyIterator(MyClass clazz, int index)
+        {
+            this._class = clazz;
+            this._index = index;
+        }
+    }
+
+    public class MainClass
+    {
+        private readonly object _returnLock = new object(); 
+ 
+        private MyClass _head; 
+        private MyClass _tail; 
+        private MyIterator _lastStart;
+
+        public MyIterator TestMethod()
+        {
+            lock (_returnLock) 
+            {
+                if (_tail == null) 
+                { 
+                    return default(MyIterator); 
+                }
+
+                // In this assignment there could be a GC hole:
+                // gcrReg -[rbx]
+                // byrReg +[rbx]
+                // add    rbx, 32
+                // mov    r15, rbx <--- r15 is not tracked to have a byref pointer.
+                // If a GC happens between this instruction and the next one, we have an invalid pointer.
+                // gcrReg -[rdi]
+                // byrReg +[rdi]
+                // mov    rdi, r15
+                // New gcrReg live regs = 00000000 { }
+
+                _lastStart = new MyIterator(_tail, _tail.End);
+                return _lastStart; 
+            } 
+        }
+
+        static int Main(string[] args)
+        {
+            MainClass mainClass = new MainClass();
+            mainClass._head = mainClass._tail = new MyClass();
+            mainClass._head.End = 4;
+            if (mainClass.TestMethod().Class.End == 4)
+            {
+                Console.WriteLine("Passed");
+                return 100;
+            }
+            else
+            {
+                Console.WriteLine("Failed");
+                return 1;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.csproj b/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.csproj
new file mode 100644
index 0000000000..23bd109fc0
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_4115/GitHub_4115.csproj
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT\11.0\UITestExtensionPackages</ReferencePath>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
+
+    <NuGetPackageImportStamp>7a9bfb7d</NuGetPackageImportStamp>
+  </PropertyGroup>
+  <!-- Default configurations to help VS understand the configurations -->
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+  <ItemGroup>
+    <CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies">
+      <Visible>False</Visible>
+    </CodeAnalysisDependentAssemblyPaths>
+  </ItemGroup>
+  <PropertyGroup>
+    <DebugType></DebugType>
+    <Optimize>True</Optimize>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+    <None Include="project.json" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <ProjectJson>project.json</ProjectJson>
+    <ProjectLockJson>project.lock.json</ProjectLockJson>
+  </PropertyGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' ">
+  </PropertyGroup> 
+</Project>
diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_4115/app.config b/tests/src/JIT/Regression/JitBlue/GitHub_4115/app.config
new file mode 100644
index 0000000000..62803f5972
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_4115/app.config
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.20.0" newVersion="4.0.20.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
\ No newline at end of file
diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_4115/project.json b/tests/src/JIT/Regression/JitBlue/GitHub_4115/project.json
new file mode 100644
index 0000000000..f084fdaed9
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_4115/project.json
@@ -0,0 +1,36 @@
+{
+  "dependencies": {
+    "Microsoft.NETCore.Platforms": "1.0.1-rc2-23816",
+    "System.Collections": "4.0.10",
+    "System.Collections.NonGeneric": "4.0.1-rc2-23816",
+    "System.Collections.Specialized": "4.0.1-rc2-23816",
+    "System.ComponentModel": "4.0.1-rc2-23816",
+    "System.Console": "4.0.0-rc2-23816",
+    "System.Diagnostics.Process": "4.1.0-rc2-23816",
+    "System.Globalization": "4.0.10",
+    "System.Globalization.Calendars": "4.0.0",
+    "System.IO": "4.0.10",
+    "System.IO.FileSystem": "4.0.0",
+    "System.IO.FileSystem.Primitives": "4.0.0",
+    "System.Linq": "4.0.1-rc2-23816",
+    "System.Linq.Queryable": "4.0.1-rc2-23816",
+    "System.Reflection": "4.1.0-rc2-23816",
+    "System.Reflection.Primitives": "4.0.0",
+    "System.Runtime": "4.1.0-rc2-23816",
+    "System.Runtime.Extensions": "4.0.10",
+    "System.Runtime.Handles": "4.0.0",
+    "System.Runtime.InteropServices": "4.1.0-rc2-23816",
+    "System.Runtime.Loader": "4.0.0-rc2-23816",
+    "System.Text.Encoding": "4.0.10",
+    "System.Threading": "4.0.10",
+    "System.Threading.Thread": "4.0.0-rc2-23816",
+    "System.Threading.ThreadPool": "4.0.10-rc2-23816",
+    "System.Xml.ReaderWriter": "4.0.11-rc2-23816",
+    "System.Xml.XDocument": "4.0.11-rc2-23816",
+    "System.Xml.XmlDocument": "4.0.1-rc2-23816",
+    "System.Xml.XmlSerializer": "4.0.11-rc2-23816"
+  },
+  "frameworks": {
+    "dnxcore50": {}
+  }
+}
\ No newline at end of file