Implement ISOSDacInterface::GetJitManagerList in cDAC SOSDacImpl by Copilot · Pull Request #124815 · dotnet/runtime

Copilot · 2026-02-24T20:22:07Z

Implement ISOSDacInterface::GetJitManagerList in cDAC SOSDacImpl
Add C++ data descriptors for EEJitManager and EEJitManagerAddress global
Add GetEEJitManagerInfo to IExecutionManager contract
Implement in ExecutionManagerCore, forward in ExecutionManager_1/ExecutionManager_2
Update SOSDacImpl with full implementation
Add unit tests (16 new tests, 173 total ExecutionManager tests passing)
Update documentation
Fix MSVC constexpr build failures
Resolve merge conflicts with main (latest: DacpSyncBlockData from SyncBlock PR)

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dotnet-policy-service · 2026-02-24T20:40:54Z

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- Add AllCodeHeaps field to cdac_data<EEJitManager> and EEJitManagerAddress global pointer - Update datadescriptor.inc with new type field and global pointer - Add JitManagerInfo struct and GetJitManagerInfo() to IExecutionManager contract - Implement GetJitManagerInfo in ExecutionManagerCore, ExecutionManager_1, ExecutionManager_2 - Define DacpJitManagerInfo struct in ISOSDacInterface.cs - Implement GetJitManagerList in SOSDacImpl.cs with DEBUG comparison - Add unit tests for GetJitManagerInfo (16 new tests, all pass) - Update MockDescriptors.ExecutionManager with EEJitManager type and global Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

… descriptors Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

max-charlamb

Pretty close, @copilot address comments.

...ed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IExecutionManager.cs

Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot

Pull request overview

Implements the cDAC-side ISOSDacInterface::GetJitManagerList by plumbing the EEJitManager address and heap list through CoreCLR data descriptors into the managed ExecutionManager contract, then consuming it from SOSDacImpl with DEBUG legacy-DAC comparison.

Changes:

Add CoreCLR data descriptor support for EEJitManager::m_pAllCodeHeaps and expose a global pointer to ExecutionManager::m_pEEJitManager.
Add JitManagerInfo + GetEEJitManagerInfo() to the managed IExecutionManager contract and implement it in ExecutionManagerCore.
Update SOS COM interface/implementation to use a typed DacpJitManagerInfo and add contract-level unit tests + documentation updates.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/native/managed/cdac/tests/MockDescriptors/MockDescriptors.ExecutionManager.cs	Extends mock target descriptors/globals to model EEJitManager and its heap list pointer.
src/native/managed/cdac/tests/ExecutionManager/ExecutionManagerTests.cs	Adds unit tests validating `GetEEJitManagerInfo()` across arch/version permutations.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/SOSDacImpl.cs	Replaces GetJitManagerList stub with a contract-backed implementation + DEBUG legacy comparison.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ISOSDacInterface.cs	Introduces `DacpJitManagerInfo` and updates COM signature to use a typed pointer.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Data/EEJitManager.cs	Adds `AllCodeHeaps` data-model field read from the target.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/ExecutionManager/ExecutionManager_1.cs	Forwards `GetEEJitManagerInfo()` to the core implementation.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/ExecutionManager/ExecutionManager_2.cs	Forwards `GetEEJitManagerInfo()` to the core implementation.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/ExecutionManager/ExecutionManagerCore.cs	Implements `GetEEJitManagerInfo()` by reading the new global + EEJitManager data.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Constants.cs	Adds `Globals.EEJitManagerAddress` constant name.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IExecutionManager.cs	Adds `JitManagerInfo` struct and the new contract method.
src/coreclr/vm/datadescriptor/datadescriptor.inc	Exposes `EEJitManager.AllCodeHeaps` and the `EEJitManagerAddress` global pointer.
src/coreclr/vm/codeman.h	Adds cdac_data access for `m_pAllCodeHeaps` and exposes `m_pEEJitManager` pointer location.
docs/design/datacontracts/ExecutionManager.md	Documents the new descriptor/global and contract API.

....Diagnostics.DataContractReader.Contracts/Contracts/ExecutionManager/ExecutionManagerCore.cs

src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Data/EEJitManager.cs

src/coreclr/vm/datadescriptor/datadescriptor.inc

docs/design/datacontracts/ExecutionManager.md

max-charlamb · 2026-02-24T21:59:48Z

@copilot , use the CI-Analysis tool to look at the runtime-diagnostics pipeline failures. There is a problem that one of the datadescriptors added does not evaluate to a constant.

…data<ExecutionManager> Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

noahfalk · 2026-02-25T12:24:03Z

Should we keep this as a draft until copilot is done with its checklist?

max-charlamb · 2026-02-25T14:39:47Z

@copilot, try again (and please resolve the merge conflicts)

…L_POINTER instead of constexpr intermediary The cdac_data<ExecutionManager>::EEJitManagerPtr constexpr member was failing to evaluate as a constant on MSVC because taking the address of a static member variable (SPTR_DECL expands to static PTR_EEJitManager) is not a constant expression. Use the direct &ExecutionManager::m_pEEJitManager pattern (matching how AppDomain::m_pTheAppDomain is exposed). Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot · 2026-02-25T14:46:58Z

@copilot, try again (and please resolve the merge conflicts)

Fixed the CI failure in d65ad16 — the cdac_data<ExecutionManager>::EEJitManagerPtr constexpr member was not evaluating as a constant on MSVC because & of an SPTR_DECL static member is not a constant expression. Changed to use &ExecutionManager::m_pEEJitManager directly in CDAC_GLOBAL_POINTER (matching the AppDomain::m_pTheAppDomain pattern).

Note: there's a merge conflict in ExecutionManagerCore.cs due to the RangeSectionFromCodeBlockHandle refactoring on main. This will need a rebase from your side since I cannot force-push.

…nFragment.cs Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot · 2026-02-27T15:35:13Z

@copilot, can you fix the merge conflicts?

Fixed in 72af2c6. The merge conflict artifact in RangeSectionFragment.cs was accidentally reverting the collectible flag stripping logic (& ~1ul) that was added in #124929. Restored main's version. All 920 cDAC tests pass.

max-charlamb · 2026-02-27T15:42:29Z

@copilot, there are still merge conflicts. Please resolve them

...ed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IExecutionManager.cs

…ectibleFragmentNext and GetEEJitManagerInfo tests) Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot · 2026-02-27T15:49:54Z

@copilot, there are still merge conflicts. Please resolve them

Resolved in 9cb5452. Merged latest main — the conflict was in ExecutionManagerTests.cs where the GetMethodDesc_CollectibleFragmentNext test from #124929 overlapped with the GetEEJitManagerInfo tests. Both test sets are preserved. All 173 ExecutionManager tests pass.

…-jit-manager-list # Conflicts: # src/native/managed/cdac/tests/ExecutionManager/ExecutionManagerTests.cs

…arameters Co-authored-by: rcj1 <77995559+rcj1@users.noreply.github.com>

Copilot · 2026-02-27T16:01:50Z

@copilot, there are still merge conflicts. Please resolve them

Resolved in 4ff5c48. Merged latest main — the conflict was in ExecutionManagerTests.cs where the GetMethodDesc_CollectibleFragmentNext test from #124929 overlapped with the GetEEJitManagerInfo tests. Both test sets are preserved. All 173 ExecutionManager tests pass.

rcj1 · 2026-02-27T16:51:28Z

@copilot code review[agent] ignore my last comment

rcj1 · 2026-02-27T16:51:58Z

@copilot revert 4ff5c48

Co-authored-by: rcj1 <77995559+rcj1@users.noreply.github.com>

Copilot · 2026-02-27T17:03:06Z

@copilot revert 4ff5c48

Already reverted in ebf7140 — JitManagerInfo struct is restored and GetEEJitManagerInfo returns the struct. All 173 ExecutionManager tests pass.

max-charlamb · 2026-03-02T18:07:34Z

@copilot , can you please fix the merge conflicts?

…nagerInfo and DacpSyncBlockData structs)

Copilot · 2026-03-02T18:14:40Z

@copilot , can you please fix the merge conflicts?

Resolved in b8bc058. The conflict was in ISOSDacInterface.cs where our DacpJitManagerInfo struct overlapped with the new DacpSyncBlockData struct from the SyncBlock PR — kept both structs. All 173 ExecutionManager tests pass.

Initial plan

6055dcd

Copilot AI assigned Copilot and max-charlamb Feb 24, 2026

Copilot started work on behalf of max-charlamb February 24, 2026 20:22 View session

github-actions bot added the area-Diagnostics-coreclr label Feb 24, 2026

Copilot AI and others added 2 commits February 24, 2026 20:52

Update ExecutionManager contract documentation with new APIs and data…

8c9dae4

… descriptors Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Add GetJitManagerList implementation to ISOSDacInterface~~ Implement ISOSDacInterface::GetJitManagerList in cDAC SOSDacImpl Feb 24, 2026

Copilot finished work on behalf of max-charlamb February 24, 2026 21:01

max-charlamb reviewed Feb 24, 2026

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...ed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IExecutionManager.cs Outdated Show resolved Hide resolved

Copilot started work on behalf of max-charlamb February 24, 2026 21:27 View session

Rename GetJitManagerInfo to GetEEJitManagerInfo per review feedback

0c9e089

Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot finished work on behalf of max-charlamb February 24, 2026 21:32

max-charlamb marked this pull request as ready for review February 24, 2026 21:45

max-charlamb requested review from Copilot and rcj1 February 24, 2026 21:45

Copilot started reviewing on behalf of max-charlamb February 24, 2026 21:46 View session

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Copilot started work on behalf of max-charlamb February 24, 2026 21:59 View session

Copilot AI and others added 2 commits February 24, 2026 22:47

Change EEJitManagerPtr to use typed pointer instead of void* in cdac_…

f4859c6

…data<ExecutionManager> Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Apply suggestion from @Copilot

ad57c13

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

max-charlamb marked this pull request as draft February 25, 2026 14:39

Copilot started work on behalf of max-charlamb February 25, 2026 14:39 View session

Fix merge artifact: restore collectible flag stripping in RangeSectio…

72af2c6

…nFragment.cs Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot finished work on behalf of max-charlamb February 27, 2026 15:36

Copilot started work on behalf of max-charlamb February 27, 2026 15:42 View session

rcj1 reviewed Feb 27, 2026

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...ed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IExecutionManager.cs Show resolved Hide resolved

Merge main: resolve ExecutionManagerTests.cs conflict (keep both Coll…

9cb5452

…ectibleFragmentNext and GetEEJitManagerInfo tests) Co-authored-by: max-charlamb <44248479+max-charlamb@users.noreply.github.com>

Copilot finished work on behalf of max-charlamb February 27, 2026 15:52

Copilot started work on behalf of rcj1 February 27, 2026 15:52 View session

copilot and others added 2 commits February 27, 2026 15:58

Merge remote-tracking branch 'origin/main' into copilot/implement-get…

3ca6f52

…-jit-manager-list # Conflicts: # src/native/managed/cdac/tests/ExecutionManager/ExecutionManagerTests.cs

Resolve merge conflicts and refactor GetEEJitManagerInfo to use out p…

4ff5c48

…arameters Co-authored-by: rcj1 <77995559+rcj1@users.noreply.github.com>

Copilot finished work on behalf of rcj1 February 27, 2026 16:03

Copilot started work on behalf of rcj1 February 27, 2026 16:51 View session

Revert 4ff5c48: restore JitManagerInfo struct instead of out parameters

ebf7140

Co-authored-by: rcj1 <77995559+rcj1@users.noreply.github.com>

Copilot finished work on behalf of rcj1 February 27, 2026 16:57

Copilot started work on behalf of rcj1 February 27, 2026 16:57 View session

Copilot finished work on behalf of rcj1 February 27, 2026 17:04

Copilot started work on behalf of max-charlamb March 2, 2026 18:07 View session

Merge main: resolve ISOSDacInterface.cs conflict (keep both DacpJitMa…

b8bc058

…nagerInfo and DacpSyncBlockData structs)

Copilot finished work on behalf of max-charlamb March 2, 2026 18:15

max-charlamb merged commit ee282ee into main Mar 3, 2026
110 of 114 checks passed

max-charlamb deleted the copilot/implement-get-jit-manager-list branch March 3, 2026 15:25

dotnet-maestro bot mentioned this pull request Mar 4, 2026

[main] Source code updates from dotnet/runtime dotnet/dotnet#5186

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Pull request overview

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