[Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076

Closed
#89142
Closed
[Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
#89142
Assignees
vargaz
Labels
area-Codegen-AOT-mono

Description

@lateralusX
lateralusX
opened on Jul 18, 2023

Description

Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:

interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.

One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:

if (mono_use_interpreter && !mono_aot_only)

That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.

Reproduction Steps

Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs

I have only tested it on Windows x64, but will most likely repro on other platforms.

There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.

Expected behavior

No crash.

Actual behavior

Crash.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response

Metadata

Metadata

Assignees

Labels

area-Codegen-AOT-mono

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    Skip to content
    [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
    Closed
    #89142
    Closed
    [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
    #89142
    Assignees
    vargaz
    Labels
    area-Codegen-AOT-mono
    Description
    @lateralusX
    lateralusX
    opened on Jul 18, 2023
    Description
    Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
    interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

    Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
    One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
    if (mono_use_interpreter && !mono_aot_only)
    That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
    Reproduction Steps
    Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
    I have only tested it on Windows x64, but will most likely repro on other platforms.
    There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
    Expected behavior
    No crash.
    Actual behavior
    Crash.
    Regression?
    No response
    Known Workarounds
    No response
    Configuration
    No response
    Other information
    No response
    Metadata
    Metadata
    Assignees
    Labels
    area-Codegen-AOT-mono
    Type
    No type
    Projects
    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
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      Skip to content
      [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
      Closed
      #89142
      Closed
      [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
      #89142
      Assignees
      vargaz
      Labels
      area-Codegen-AOT-mono
      Description
      @lateralusX
      lateralusX
      opened on Jul 18, 2023
      Description
      Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
      interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

      Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
      One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
      if (mono_use_interpreter && !mono_aot_only)
      That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
      Reproduction Steps
      Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
      I have only tested it on Windows x64, but will most likely repro on other platforms.
      There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
      Expected behavior
      No crash.
      Actual behavior
      Crash.
      Regression?
      No response
      Known Workarounds
      No response
      Configuration
      No response
      Other information
      No response
      Metadata
      Metadata
      Assignees
      Labels
      area-Codegen-AOT-mono
      Type
      No type
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
        Closed
        #89142
        Closed
        [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
        #89142
        Assignees
        vargaz
        Labels
        area-Codegen-AOT-mono
        Description
        @lateralusX
        lateralusX
        opened on Jul 18, 2023
        Description
        Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
        interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

        Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
        One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
        if (mono_use_interpreter && !mono_aot_only)
        That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
        Reproduction Steps
        Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
        I have only tested it on Windows x64, but will most likely repro on other platforms.
        There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
        Expected behavior
        No crash.
        Actual behavior
        Crash.
        Regression?
        No response
        Known Workarounds
        No response
        Configuration
        No response
        Other information
        No response
        Metadata
        Metadata
        Assignees
        Labels
        area-Codegen-AOT-mono
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
          Closed
          #89142
          Closed
          [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
          #89142
          Assignees
          vargaz
          Labels
          area-Codegen-AOT-mono
          Description
          @lateralusX
          lateralusX
          opened on Jul 18, 2023
          Description
          Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
          interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

          Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
          One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
          if (mono_use_interpreter && !mono_aot_only)
          That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
          Reproduction Steps
          Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
          I have only tested it on Windows x64, but will most likely repro on other platforms.
          There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
          Expected behavior
          No crash.
          Actual behavior
          Crash.
          Regression?
          No response
          Known Workarounds
          No response
          Configuration
          No response
          Other information
          No response
          Metadata
          Metadata
          Assignees
          Labels
          area-Codegen-AOT-mono
          Type
          No type
          Projects
          No projects
            Milestone
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            Relationships
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            No branches or pull requests
            Issue actions
            
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
            Closed
            #89142
            Closed
            [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
            #89142
            Assignees
            vargaz
            Labels
            area-Codegen-AOT-mono
            Description
            @lateralusX
            lateralusX
            opened on Jul 18, 2023
            Description
            Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
            interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

            Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
            One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
            if (mono_use_interpreter && !mono_aot_only)
            That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
            Reproduction Steps
            Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
            I have only tested it on Windows x64, but will most likely repro on other platforms.
            There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
            Expected behavior
            No crash.
            Actual behavior
            Crash.
            Regression?
            No response
            Known Workarounds
            No response
            Configuration
            No response
            Other information
            No response
            Metadata
            Metadata
            Assignees
            Labels
            area-Codegen-AOT-mono
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              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
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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';
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observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
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}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
              Closed
              #89142
              Closed
              [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
              #89142
              Assignees
              vargaz
              Labels
              area-Codegen-AOT-mono
              Description
              @lateralusX
              lateralusX
              opened on Jul 18, 2023
              Description
              Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
              interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

              Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
              One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
              if (mono_use_interpreter && !mono_aot_only)
              That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
              Reproduction Steps
              Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
              I have only tested it on Windows x64, but will most likely repro on other platforms.
              There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
              Expected behavior
              No crash.
              Actual behavior
              Crash.
              Regression?
              No response
              Known Workarounds
              No response
              Configuration
              No response
              Other information
              No response
              Metadata
              Metadata
              Assignees
              Labels
              area-Codegen-AOT-mono
              Type
              No type
              Projects
              No projects
                Milestone
                No 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();
}
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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); }
})();
})();

                Skip to content
                [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode. #89076
                Closed
                #89142
                Closed
                [Mono]: test_0_ldvirtftn_generic_method in generics.cs crash in Full AOT + Interp mode.#89076
                #89142
                Assignees
                vargaz
                Labels
                area-Codegen-AOT-mono
                Description
                @lateralusX
                lateralusX
                opened on Jul 18, 2023
                Description
                Running one of the old Mono runtime regressions tests, generics.cs under Full AOT + Interp crash in test_0_ldvirtftn_generic_method with the following callstack:
                interp_init_delegate(_MonoDelegate * del, MonoDelegateTrampInfo * * out_info, _MonoErrorInternal * error) Line 1795 C
mini_init_delegate(_MonoDelegateHandle delegate, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 3968 C
mono_delegate_ctor(_MonoObjectHandle this_obj, _MonoObjectHandle target, void * addr, _MonoMethod * method, _MonoErrorInternal * error) Line 7659 C
ves_icall_mono_delegate_ctor(_MonoObject * this_obj_raw, _MonoObject * target_raw, void * addr) Line 1527 C
mono_aot_corlibjit_code_start() Unknown
generics_Tests_ldvirtftn_T_REF() Unknown
generics_Tests_test_0_ldvirtftn_generic_method() Unknown
mono_aot_corlibjit_code_start() Unknown

                Happens because address is pointing into out static_rgctx_trampolines, but there is no method for the delegate, that will trigger fallback into interp_init_delegate that in turn assumes that method_ptr is an interpreter method, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/interp/interp.c#L1749, but since this is not an interpreter method, it will trigger the crash in above callstack.
                One potential fix is to do a more precise condition in https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/mini-runtime.c#L4031 like:
                if (mono_use_interpreter && !mono_aot_only)
                That will make sure not to go through mini_get_interp_callbacks ()->init_delegate when we run in Full AOT + Interp mode, the condition could potentially be made a little more precise to handle this specific case where we already have a working delegate method_ptr in the AOT image (we should favor anything in the AOT image before fallback to interpreter), but maybe we would need to hit init_delegate in some other scenarios running Full AOT + Interp.
                Reproduction Steps
                Run generics.cs runtime test using Mono Full AOT + Interp mode, https://github.com/dotnet/runtime/blob/main/src/mono/mono/mini/generics.cs
                I have only tested it on Windows x64, but will most likely repro on other platforms.
                There have also been reports of a similar crash when using Delegate.CreateDelegate under Full AOT + Interp.
                Expected behavior
                No crash.
                Actual behavior
                Crash.
                Regression?
                No response
                Known Workarounds
                No response
                Configuration
                No response
                Other information
                No response
                Metadata
                Metadata
                Assignees
                Labels
                area-Codegen-AOT-mono
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions