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ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762

Closed
#76401
Closed
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
#76401
Assignees
hoyosjs
Labels
area-Diagnostics-coreclr
Milestone
7.0.0

Description

@gregg-miskelly
gregg-miskelly
opened on Sep 16, 2022

Description

.NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.

Reproduction Steps

  1. Create a new .NET 7 RC1 console app, with the following code:
classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
  1. Start debugging in Visual Studio
  2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
  3. Visual Studio will stop again when the exception is unhandled
  4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
  5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process

Expected behavior

.NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound

Actual behavior

Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:

 coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

Regression?

Regression from .NET 7 preview 7 (and all previous versions)

Known Workarounds

This doesn't happen when stopping when the exception is thrown

Configuration

.NET 7 rc1
Windows
This happens on x64, it doesn't happen on x86.

Other information

No response

Metadata

Metadata

Assignees

Labels

area-Diagnostics-coreclr

Type

No type

Projects

No projects

    Milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions

    , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
    Skip to content
    ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
    Closed
    #76401
    Closed
    ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
    #76401
    Assignees
    hoyosjs
    Labels
    area-Diagnostics-coreclr
    Milestone
    7.0.0
    Description
    @gregg-miskelly
    gregg-miskelly
    opened on Sep 16, 2022
    Description
    .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
    Reproduction Steps
    1. Create a new .NET 7 RC1 console app, with the following code:
    classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
    1. Start debugging in Visual Studio
    2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
    3. Visual Studio will stop again when the exception is unhandled
    4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
    5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
    Expected behavior
    .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
    Actual behavior
    Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
     coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

    Regression?
    Regression from .NET 7 preview 7 (and all previous versions)
    Known Workarounds
    This doesn't happen when stopping when the exception is thrown
    Configuration
    .NET 7 rc1
    
Windows
    
This happens on x64, it doesn't happen on x86.
    Other information
    No response
    Metadata
    Metadata
    Assignees
    Labels
    area-Diagnostics-coreclr
    Type
    No type
    Projects
    No projects
      Milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
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}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
      Skip to content
      ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
      Closed
      #76401
      Closed
      ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
      #76401
      Assignees
      hoyosjs
      Labels
      area-Diagnostics-coreclr
      Milestone
      7.0.0
      Description
      @gregg-miskelly
      gregg-miskelly
      opened on Sep 16, 2022
      Description
      .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
      Reproduction Steps
      1. Create a new .NET 7 RC1 console app, with the following code:
      classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
      1. Start debugging in Visual Studio
      2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
      3. Visual Studio will stop again when the exception is unhandled
      4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
      5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
      Expected behavior
      .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
      Actual behavior
      Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
       coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

      Regression?
      Regression from .NET 7 preview 7 (and all previous versions)
      Known Workarounds
      This doesn't happen when stopping when the exception is thrown
      Configuration
      .NET 7 rc1
      
Windows
      
This happens on x64, it doesn't happen on x86.
      Other information
      No response
      Metadata
      Metadata
      Assignees
      Labels
      area-Diagnostics-coreclr
      Type
      No type
      Projects
      No projects
        Milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
        Skip to content
        ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
        Closed
        #76401
        Closed
        ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
        #76401
        Assignees
        hoyosjs
        Labels
        area-Diagnostics-coreclr
        Milestone
        7.0.0
        Description
        @gregg-miskelly
        gregg-miskelly
        opened on Sep 16, 2022
        Description
        .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
        Reproduction Steps
        1. Create a new .NET 7 RC1 console app, with the following code:
        classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
        1. Start debugging in Visual Studio
        2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
        3. Visual Studio will stop again when the exception is unhandled
        4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
        5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
        Expected behavior
        .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
        Actual behavior
        Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
         coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

        Regression?
        Regression from .NET 7 preview 7 (and all previous versions)
        Known Workarounds
        This doesn't happen when stopping when the exception is thrown
        Configuration
        .NET 7 rc1
        
Windows
        
This happens on x64, it doesn't happen on x86.
        Other information
        No response
        Metadata
        Metadata
        Assignees
        Labels
        area-Diagnostics-coreclr
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
          Skip to content
          ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
          Closed
          #76401
          Closed
          ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
          #76401
          Assignees
          hoyosjs
          Labels
          area-Diagnostics-coreclr
          Milestone
          7.0.0
          Description
          @gregg-miskelly
          gregg-miskelly
          opened on Sep 16, 2022
          Description
          .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
          Reproduction Steps
          1. Create a new .NET 7 RC1 console app, with the following code:
          classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
          1. Start debugging in Visual Studio
          2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
          3. Visual Studio will stop again when the exception is unhandled
          4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
          5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
          Expected behavior
          .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
          Actual behavior
          Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
           coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

          Regression?
          Regression from .NET 7 preview 7 (and all previous versions)
          Known Workarounds
          This doesn't happen when stopping when the exception is thrown
          Configuration
          .NET 7 rc1
          
Windows
          
This happens on x64, it doesn't happen on x86.
          Other information
          No response
          Metadata
          Metadata
          Assignees
          Labels
          area-Diagnostics-coreclr
          Type
          No type
          Projects
          No projects
            Milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
            Skip to content
            ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
            Closed
            #76401
            Closed
            ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
            #76401
            Assignees
            hoyosjs
            Labels
            area-Diagnostics-coreclr
            Milestone
            7.0.0
            Description
            @gregg-miskelly
            gregg-miskelly
            opened on Sep 16, 2022
            Description
            .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
            Reproduction Steps
            1. Create a new .NET 7 RC1 console app, with the following code:
            classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
            1. Start debugging in Visual Studio
            2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
            3. Visual Studio will stop again when the exception is unhandled
            4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
            5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
            Expected behavior
            .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
            Actual behavior
            Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
             coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

            Regression?
            Regression from .NET 7 preview 7 (and all previous versions)
            Known Workarounds
            This doesn't happen when stopping when the exception is thrown
            Configuration
            .NET 7 rc1
            
Windows
            
This happens on x64, it doesn't happen on x86.
            Other information
            No response
            Metadata
            Metadata
            Assignees
            Labels
            area-Diagnostics-coreclr
            Type
            No type
            Projects
            No projects
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              Relationships
              None yet
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              No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
              Skip to content
              ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
              Closed
              #76401
              Closed
              ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
              #76401
              Assignees
              hoyosjs
              Labels
              area-Diagnostics-coreclr
              Milestone
              7.0.0
              Description
              @gregg-miskelly
              gregg-miskelly
              opened on Sep 16, 2022
              Description
              .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
              Reproduction Steps
              1. Create a new .NET 7 RC1 console app, with the following code:
              classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
              1. Start debugging in Visual Studio
              2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
              3. Visual Studio will stop again when the exception is unhandled
              4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
              5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
              Expected behavior
              .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
              Actual behavior
              Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
               coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

              Regression?
              Regression from .NET 7 preview 7 (and all previous versions)
              Known Workarounds
              This doesn't happen when stopping when the exception is thrown
              Configuration
              .NET 7 rc1
              
Windows
              
This happens on x64, it doesn't happen on x86.
              Other information
              No response
              Metadata
              Metadata
              Assignees
              Labels
              area-Diagnostics-coreclr
              Type
              No type
              Projects
              No projects
                Milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows · Issue #75762 · dotnet/runtime · GitHub
                Skip to content
                ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows #75762
                Closed
                #76401
                Closed
                ICorDebugThread2.InterceptCurrentException corrupts process in x64 Windows#75762
                #76401
                Assignees
                hoyosjs
                Labels
                area-Diagnostics-coreclr
                Milestone
                7.0.0
                Description
                @gregg-miskelly
                gregg-miskelly
                opened on Sep 16, 2022
                Description
                .NET 7 RC1 has a regression where attempting to intercept an unhandled NullReferenceException in the faulting frame winds up terminating the process.
                Reproduction Steps
                1. Create a new .NET 7 RC1 console app, with the following code:
                classProgram{intMyField;publicstaticvoidMain(string[]args){Programp=null!;p.MyField=12;Console.WriteLine("Done");}}
                1. Start debugging in Visual Studio
                2. Visual Studio will stop when the exception is thrown, continue from here (you can also pre-configured the debugger to not stop on thrown null reference exceptions)
                3. Visual Studio will stop again when the exception is unhandled
                4. Open up the call stack window, right click on the top frame, and select "Unwind to this frame"
                5. Visual Studio will call ICorDebugThread2.InterceptCurrentException and then continue the process
                Expected behavior
                .NET debugging services will raise an ExceptionUnwind callback to indicate that the exception is unwound
                Actual behavior
                Target process crashes due to internal access violations. The first AV is because the IP is set to 0x000000000000bad0, and then hits a second AV with the following stack:
                 coreclr.dll!VirtualCallStubManager::predictStubKind(unsigned __int64 stubStartAddress) Line 887	C++
coreclr.dll!VirtualCallStubManager::getStubKind(unsigned __int64 stubStartAddress, int usePredictStubKind) Line 329	C++
coreclr.dll!VirtualCallStubManager::FindStubManager(unsigned __int64 stubAddress, VirtualCallStubManager::StubKind * wbStubKind, int) Line 987	C++
coreclr.dll!AdjustContextForVirtualStub(_EXCEPTION_RECORD * pExceptionRecord, _CONTEXT * pContext) Line 606	C++
coreclr.dll!CLRVectoredExceptionHandlerPhase2(_EXCEPTION_POINTERS * pExceptionInfo) Line 6917	C++
coreclr.dll!CLRVectoredExceptionHandler(_EXCEPTION_POINTERS * pExceptionInfo) Line 6884	C++
coreclr.dll!CLRVectoredExceptionHandlerShim(_EXCEPTION_POINTERS * pExceptionInfo) Line 7601	C++
>	ntdll.dll!RtlpCallVectoredHandlers(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord, unsigned long Index) Line 204	C
[Inline Frame] ntdll.dll!RtlCallVectoredExceptionHandlers(_EXCEPTION_RECORD *) Line 345	C
ntdll.dll!RtlDispatchException(_EXCEPTION_RECORD * ExceptionRecord, _CONTEXT * ContextRecord) Line 357	C
ntdll.dll!KiUserExceptionDispatch() Line 751	Unknown

                Regression?
                Regression from .NET 7 preview 7 (and all previous versions)
                Known Workarounds
                This doesn't happen when stopping when the exception is thrown
                Configuration
                .NET 7 rc1
                
Windows
                
This happens on x64, it doesn't happen on x86.
                Other information
                No response
                Metadata
                Metadata
                Assignees
                Labels
                area-Diagnostics-coreclr
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions