assert in mono_marshal_ilgen_init #83804

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Closed
assert in mono_marshal_ilgen_init#83804
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jandupej
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area-VM-meta-mono
Milestone
7.0.x

Description

@tmds
tmds
opened on Mar 23, 2023

We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).

The stacktrace has the following:

Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

The interesting part is:

...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:

runtime/src/mono/mono/metadata/marshal-ilgen.c

Lines 35 to 42 in 3286b32

void
mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb)
{
g_assert (!ilgen_cb_inited);
g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION);
memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks));
ilgen_cb_inited= TRUE;
}

I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?

cc @lambdageek@omajid@Swapnali911

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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    assert in mono_marshal_ilgen_init #83804
    Closed
    Closed
    assert in mono_marshal_ilgen_init#83804
    Assignees
    jandupej
    Labels
    area-VM-meta-mono
    Milestone
    7.0.x
    Description
    @tmds
    tmds
    opened on Mar 23, 2023
    We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
    The stacktrace has the following:
    Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

    The interesting part is:
    ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

    Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
    runtime/src/mono/mono/metadata/marshal-ilgen.c
    
Lines 35 to 42
in
3286b32
    void
    mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
     { 
    g_assert (!ilgen_cb_inited); 
    g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
    memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
    ilgen_cb_inited= TRUE; 
     } 
    I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
    cc @lambdageek@omajid@Swapnali911
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, '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
      assert in mono_marshal_ilgen_init #83804
      Closed
      Closed
      assert in mono_marshal_ilgen_init#83804
      Assignees
      jandupej
      Labels
      area-VM-meta-mono
      Milestone
      7.0.x
      Description
      @tmds
      tmds
      opened on Mar 23, 2023
      We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
      The stacktrace has the following:
      Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

      The interesting part is:
      ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

      Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
      runtime/src/mono/mono/metadata/marshal-ilgen.c
      
Lines 35 to 42
in
3286b32
      void
      mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
       { 
      g_assert (!ilgen_cb_inited); 
      g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
      memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
      ilgen_cb_inited= TRUE; 
       } 
      I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
      cc @lambdageek@omajid@Swapnali911
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, '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
        assert in mono_marshal_ilgen_init #83804
        Closed
        Closed
        assert in mono_marshal_ilgen_init#83804
        Assignees
        jandupej
        Labels
        area-VM-meta-mono
        Milestone
        7.0.x
        Description
        @tmds
        tmds
        opened on Mar 23, 2023
        We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
        The stacktrace has the following:
        Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

        The interesting part is:
        ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

        Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
        runtime/src/mono/mono/metadata/marshal-ilgen.c
        
Lines 35 to 42
in
3286b32
        void
        mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
         { 
        g_assert (!ilgen_cb_inited); 
        g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
        memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
        ilgen_cb_inited= TRUE; 
         } 
        I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
        cc @lambdageek@omajid@Swapnali911
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, '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
          assert in mono_marshal_ilgen_init #83804
          Closed
          Closed
          assert in mono_marshal_ilgen_init#83804
          Assignees
          jandupej
          Labels
          area-VM-meta-mono
          Milestone
          7.0.x
          Description
          @tmds
          tmds
          opened on Mar 23, 2023
          We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
          The stacktrace has the following:
          Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

          The interesting part is:
          ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

          Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
          runtime/src/mono/mono/metadata/marshal-ilgen.c
          
Lines 35 to 42
in
3286b32
          void
          mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
           { 
          g_assert (!ilgen_cb_inited); 
          g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
          memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
          ilgen_cb_inited= TRUE; 
           } 
          I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
          cc @lambdageek@omajid@Swapnali911
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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
            assert in mono_marshal_ilgen_init #83804
            Closed
            Closed
            assert in mono_marshal_ilgen_init#83804
            Assignees
            jandupej
            Labels
            area-VM-meta-mono
            Milestone
            7.0.x
            Description
            @tmds
            tmds
            opened on Mar 23, 2023
            We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
            The stacktrace has the following:
            Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

            The interesting part is:
            ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

            Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
            runtime/src/mono/mono/metadata/marshal-ilgen.c
            
Lines 35 to 42
in
3286b32
            void
            mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
             { 
            g_assert (!ilgen_cb_inited); 
            g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
            memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
            ilgen_cb_inited= TRUE; 
             } 
            I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
            cc @lambdageek@omajid@Swapnali911
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            area-VM-meta-mono
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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
              assert in mono_marshal_ilgen_init #83804
              Closed
              Closed
              assert in mono_marshal_ilgen_init#83804
              Assignees
              jandupej
              Labels
              area-VM-meta-mono
              Milestone
              7.0.x
              Description
              @tmds
              tmds
              opened on Mar 23, 2023
              We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
              The stacktrace has the following:
              Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

              The interesting part is:
              ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

              Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
              runtime/src/mono/mono/metadata/marshal-ilgen.c
              
Lines 35 to 42
in
3286b32
              void
              mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
               { 
              g_assert (!ilgen_cb_inited); 
              g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
              memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
              ilgen_cb_inited= TRUE; 
               } 
              I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
              cc @lambdageek@omajid@Swapnali911
              Metadata
              Metadata
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              area-VM-meta-mono
              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("// 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); }
})();
})();

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                assert in mono_marshal_ilgen_init #83804
                Closed
                Closed
                assert in mono_marshal_ilgen_init#83804
                Assignees
                jandupej
                Labels
                area-VM-meta-mono
                Milestone
                7.0.x
                Description
                @tmds
                tmds
                opened on Mar 23, 2023
                We're investigating some crashes we see when source-building .NET on a heavy ppc64le machine (100+ CPU, 100+GB RAM).
                The stacktrace has the following:
                Thread 8 (Thread 0x20001300f080 (LWP 152780) ".NET ThreadPool"):
#0 0x00002000006142b4 in wait4 () from /lib64/libc.so.6
#1 0x000020000061411c in waitpid () from /lib64/libc.so.6
#2 0x0000200000b6fa50 in mono_dump_native_crash_info () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#3 0x0000200000b1efac in mono_handle_native_crash () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#4 0x0000200000b6edd8 in sigabrt_signal_handler () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#5 <signal handler called>
#6 0x00002000005b30cc in __pthread_kill_implementation () from /lib64/libc.so.6
#7 0x000020000055223c in raise () from /lib64/libc.so.6
#8 0x000020000052c70c in abort () from /lib64/libc.so.6
#9 0x0000200000bb6248 in monoeg_assert_abort () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#10 0x00002000009e07d4 in mono_log_write_logfile () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#11 0x00002000009dbb44 in structured_log_adapter () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#12 0x0000200000bb67fc in monoeg_g_logv_nofree () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#13 0x0000200000bb6960 in monoeg_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#16 0x00002000009c3ad8 in mono_emit_marshal_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#17 0x0000200000926db0 in mono_emit_marshal () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#18 0x00002000009cc074 in emit_native_wrapper_ilgen () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#19 0x0000200000928060 in mono_marshal_get_native_wrapper () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#20 0x0000200000a73cdc in mono_jit_compile_method_with_opt () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#21 0x0000200000a6d134 in mono_jit_compile_method () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#22 0x0000200000b22144 in common_call_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#23 0x0000200000b21c38 in mono_magic_trampoline () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

                The interesting part is:
                ...
#14 0x0000200000bb69dc in mono_assertion_message () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
#15 0x00002000009c3c04 in mono_marshal_ilgen_init () from /root/dotnet-v7.0.103/previous-sdk/shared/Microsoft.NETCore.App/7.0.3/libcoreclr.so
...

                Though there are no line numbers, after spelunking through the code, I think we may be hitting the assert on the first line of this function:
                runtime/src/mono/mono/metadata/marshal-ilgen.c
                
Lines 35 to 42
in
3286b32
                void
                mono_install_marshal_callbacks_ilgen (MonoMarshalIlgenCallbacks*cb) 
                 { 
                g_assert (!ilgen_cb_inited); 
                g_assert (cb->version==MONO_MARSHAL_CALLBACKS_VERSION); 
                memcpy (&ilgen_marshal_cb, cb, sizeof (MonoMarshalIlgenCallbacks)); 
                ilgen_cb_inited= TRUE; 
                 } 
                I imagine this may happen when multiple threads call mono_marshal_ilgen_init, which is more likely on a machine with many cores? Or is there something that ensures there is only a single thread performs the initialization?
                cc @lambdageek@omajid@Swapnali911
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