SIGSEGV at coreclr tracing  #48368

Closed
Closed
SIGSEGV at coreclr tracing #48368
Assignees
sywhang
Labels
area-Tracing-coreclr
Milestone
6.0.0

Description

@t-mustafin
t-mustafin
opened on Feb 16, 2021

Description

Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:

~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

Also it fails to trace via enabling environment variables:

~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

Configuration

It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
Runtime state 83143a4.
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.

Regression?

That SIGSEGV behaviour starts at ba36813.

Other information

Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:

[New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:

Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

@jkotas@sywhang@alpencolt@gbalykov

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    SIGSEGV at coreclr tracing  #48368
    Closed
    Closed
    SIGSEGV at coreclr tracing #48368
    Assignees
    sywhang
    Labels
    area-Tracing-coreclr
    Milestone
    6.0.0
    Description
    @t-mustafin
    t-mustafin
    opened on Feb 16, 2021
    Description
    Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
    ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

    Also it fails to trace via enabling environment variables:
    ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

    Configuration
    It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
    
Runtime state 83143a4.
    
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
    Regression?
    That SIGSEGV behaviour starts at ba36813.
    Other information
    Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
    [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

    Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
    Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

    @jkotas@sywhang@alpencolt@gbalykov
    Metadata
    Metadata
    Assignees
    Labels
    area-Tracing-coreclr
    Type
    No type
    Projects
    No projects
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      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      SIGSEGV at coreclr tracing  #48368
      Closed
      Closed
      SIGSEGV at coreclr tracing #48368
      Assignees
      sywhang
      Labels
      area-Tracing-coreclr
      Milestone
      6.0.0
      Description
      @t-mustafin
      t-mustafin
      opened on Feb 16, 2021
      Description
      Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
      ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

      Also it fails to trace via enabling environment variables:
      ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

      Configuration
      It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
      
Runtime state 83143a4.
      
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
      Regression?
      That SIGSEGV behaviour starts at ba36813.
      Other information
      Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
      [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

      Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
      Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

      @jkotas@sywhang@alpencolt@gbalykov
      Metadata
      Metadata
      Assignees
      Labels
      area-Tracing-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)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        SIGSEGV at coreclr tracing  #48368
        Closed
        Closed
        SIGSEGV at coreclr tracing #48368
        Assignees
        sywhang
        Labels
        area-Tracing-coreclr
        Milestone
        6.0.0
        Description
        @t-mustafin
        t-mustafin
        opened on Feb 16, 2021
        Description
        Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
        ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

        Also it fails to trace via enabling environment variables:
        ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

        Configuration
        It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
        
Runtime state 83143a4.
        
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
        Regression?
        That SIGSEGV behaviour starts at ba36813.
        Other information
        Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
        [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

        Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
        Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

        @jkotas@sywhang@alpencolt@gbalykov
        Metadata
        Metadata
        Assignees
        Labels
        area-Tracing-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)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          SIGSEGV at coreclr tracing  #48368
          Closed
          Closed
          SIGSEGV at coreclr tracing #48368
          Assignees
          sywhang
          Labels
          area-Tracing-coreclr
          Milestone
          6.0.0
          Description
          @t-mustafin
          t-mustafin
          opened on Feb 16, 2021
          Description
          Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
          ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

          Also it fails to trace via enabling environment variables:
          ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

          Configuration
          It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
          
Runtime state 83143a4.
          
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
          Regression?
          That SIGSEGV behaviour starts at ba36813.
          Other information
          Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
          [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

          Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
          Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

          @jkotas@sywhang@alpencolt@gbalykov
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          area-Tracing-coreclr
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            SIGSEGV at coreclr tracing  #48368
            Closed
            Closed
            SIGSEGV at coreclr tracing #48368
            Assignees
            sywhang
            Labels
            area-Tracing-coreclr
            Milestone
            6.0.0
            Description
            @t-mustafin
            t-mustafin
            opened on Feb 16, 2021
            Description
            Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
            ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

            Also it fails to trace via enabling environment variables:
            ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

            Configuration
            It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
            
Runtime state 83143a4.
            
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
            Regression?
            That SIGSEGV behaviour starts at ba36813.
            Other information
            Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
            [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

            Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
            Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

            @jkotas@sywhang@alpencolt@gbalykov
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            area-Tracing-coreclr
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              None yet
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              No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              SIGSEGV at coreclr tracing  #48368
              Closed
              Closed
              SIGSEGV at coreclr tracing #48368
              Assignees
              sywhang
              Labels
              area-Tracing-coreclr
              Milestone
              6.0.0
              Description
              @t-mustafin
              t-mustafin
              opened on Feb 16, 2021
              Description
              Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
              ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

              Also it fails to trace via enabling environment variables:
              ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

              Configuration
              It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
              
Runtime state 83143a4.
              
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
              Regression?
              That SIGSEGV behaviour starts at ba36813.
              Other information
              Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
              [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

              Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
              Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

              @jkotas@sywhang@alpencolt@gbalykov
              Metadata
              Metadata
              Assignees
              Labels
              area-Tracing-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)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                SIGSEGV at coreclr tracing  #48368
                Closed
                Closed
                SIGSEGV at coreclr tracing #48368
                Assignees
                sywhang
                Labels
                area-Tracing-coreclr
                Milestone
                6.0.0
                Description
                @t-mustafin
                t-mustafin
                opened on Feb 16, 2021
                Description
                Coreclr got a SIGSEGV during tracing crossgen2 via dotnet-trace.dll:
                ~/dotnet/x64_release_runtime$ ./corerun ../diagnostics/artifacts/bin/DotnetTrace.UnitTests/Release/net5.0/dotnet-trace.dll collect -- ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll Process : /home/tmustafin/dotnet/x64_release_runtime/corerun
Output File : /home/tmustafin/dotnet/x64_release_runtime/trace.nettrace
[00:00:00:00] Recording trace 151.50 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.
Process exited with code '139'.

                Also it fails to trace via enabling environment variables:
                ~/dotnet/x64_release_runtime$ COMPlus_EnableEventPipe=1 COMPlus_EventPipeConfig="" COMPlus_EventPipeOutputPath=`pwd`/trace.nettrace COMPlus_EventPipeRundown=0 ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll
Segmentation fault (core dumped)

                Configuration
                It reproduces both on x64 ubuntu 18.04 and armel tizen 6.0.0.
                
Runtime state 83143a4.
                
Diagnostics state d7663b388b16f8f64c08f9700ba09fa230c57235.
                Regression?
                That SIGSEGV behaviour starts at ba36813.
                Other information
                Gdb with set follow-fork-mode child on dotnet-trace.dll option crashes:
                [New Thread 0x7fff4c9f5700 (LWP 14435)]
No profile or providers specified, defaulting to trace profile 'cpu-sampling'
Provider Name Keywords Level Enabled By
Microsoft-DotNETCore-SampleProfiler 0x0000F00000000000 Informational(4) --profile Microsoft-Windows-DotNETRuntime 0x00000014C14FCCBD Informational(4) --profile [New Thread 0x7fff3ffff700 (LWP 14436)]
Launching: ./corerun ./crossgen2/crossgen2.dll -r:./*.dll -r:./crossgen2/*.dll ./crossgen2/crossgen2.dll --out ./crossgen2/crossgen2.ni.dll [New process 14437]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/build/gdb-kAlH5B/gdb-8.1/gdb/nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

                Gdb on environment variables option says ThreadPool thread jumps into strange address 0xffffffffffff0002:
                Thread 13 ".NET ThreadPool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff3ea9b700 (LWP 14580)]
0xffffffffffff0002 in ?? ()
(gdb) bt
#0 0xffffffffffff0002 in ?? ()
#1 0x00007fff7cd47473 in ?? ()
#2 0x0000000000000000 in ?? ()
(gdb)

                @jkotas@sywhang@alpencolt@gbalykov
                Metadata
                Metadata
                Assignees
                Labels
                area-Tracing-coreclr
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions