Commit Graph

5 Commits

Author SHA1 Message Date
Mike Saito 3d2c30b151
fix(core): lazy dlsym stub materialization, COW snapshots and deferred bootstrap logging (#94)
* fix(core): implement 4-tier lazy dlsym stub materialization and argument normalization

Enforce transactional and thread-safe resolution for standalone ELF bootstrapper pipelines. - Implement a 4-tier additive fallback cascade (T0: runtime symbols, T1: import entries scan, T2: Aerolib mapping, T3: runtime slack-pool lazy stub allocation at 0x7000_0000_0000). - Fix UnmanagedCallersOnly CLR runtime crashes on second bootstrap by adding NormalizeKernelDynlibDlsymArguments to detect and swap mirrored (symbol, handle) register inputs via rigorous pointer bounds verification. - Protect failure paths via CompleteKernelDynlibDlsymFailure, cleanly zero-filling target outputAddress buffers and returns Rax = -1 with zero managed logging execution in hot native paths.

* fix(core): harden lazy-stub diagnostics with COW snapshots and deferred bootstrap logging

Follow-up to lazy stub pool copy-on-write publishing in TryGetOrCreateLazyImportStub. - Snapshot _importEntries in ProbeReturnRip before near-call and PLT import lookup loops to prevent torn iteration during concurrent array replacement. - Defer SHARPEMU_LOG_BOOTSTRAP output: hot path records raw register slots in a ring buffer under lock; TryReadAsciiZ and Console.Error run only after import handler completion via DrainDeferredBootstrapTraces. - Normalize bootstrap dynlib register order at DispatchImport gateway entry before any logging or trace reads, so swapped RDI/RSI on Import#2 cannot fault the native gateway when bootstrap tracing is enabled. - Resolve lazy stub pool bounds from the full SelfLoader-mapped import region via VirtualQuery instead of a hardcoded 4 KiB cap. - Use ConcurrentDictionary for runtime symbol registration during concurrent dlsym. - Emit distinct [LOADER][WARN] reasons when import stub region resolution fails versus lazy stub pool exhaustion.
2026-07-13 12:25:37 +03:00
kostyaff 8a40251a1c
[logging] Migrate SelfLoader and DirectExecutionBackend.Diagnostics to SharpEmuLog (#65)
Phase 2 of Console.Error.WriteLine → structured logging migration.

SelfLoader.cs (30 sites):
- Category: "Loader"
- TLS load_start/load_done, Segment info, DTPMOD64 patching → Debug
- ELF alignment mismatch, invalid symbol value skips, CRITICAL invalid patch → Warning
- Runtime symbol index populated, Initializers discovered → Info
- [FOCUS][SCAN/SKIP] relocation trace, [RELOC] target trace → Debug
- TryLoadTableBytes diagnostics → Debug (FAILED → Warning)
- ResolveMappedAddressOrFallback trace → Debug

DirectExecutionBackend.Diagnostics.cs (17 sites):
- Category: "Native" (Log field in main DirectExecutionBackend.cs partial)
- DumpRecentImportTrace → Info
- Suspicious unresolved pointer hits/cap → Warning
- ProbeReturnRip return-rip bytes/slots/PLT trace → Debug

Level mapping: [TRACE]/[FOCUS]/[RELOC]/[TEST] → Debug; [INFO] → Info;
[WARNING]/WARNING/CRITICAL/Skipping/FAILED → Warning.

[LOADER] prefix dropped — category is in LogEntry.

Console.WriteLine (stdout, ~25 sites in SelfLoader.cs) intentionally
left untouched — only Console.Error.WriteLine was in scope.

Build: 0 errors, 0 warnings.

Co-authored-by: Hermes Atlas <hermesatlas@example.com>
2026-07-11 22:17:40 +03:00
ParantezTech 0e922a73ee [core] Improve native execution and guest threading 2026-06-28 23:45:26 +03:00
ParantezTech 2a52ccfe6a [cpu] Add guest thread continuation 2026-06-21 23:18:29 +03:00
ParantezTech 4d73f469bc initial commit 2026-03-11 15:48:28 +03:00