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d7c532d889
There are still some other issues not addressed here, but it's a start. Workarounds for false-positive reports: - `RasterizerAccelerated`: Put a gigantic array behind a `unique_ptr`, because UBSan has a [hardcoded limit](https://stackoverflow.com/questions/64531383/c-runtime-error-using-fsanitize-undefined-object-has-a-possibly-invalid-vp) of how big it thinks objects can be, specifically when dealing with offset-to-top values used with multiple inheritance. Hopefully this doesn't have a performance impact. - `QueryCacheBase::QueryCacheBase`: Avoid an operation that UBSan thinks is UB even though it at least arguably isn't. See the link in the comment for more information. Fixes for correct reports: - `PageTable`, `Memory`: Use `uintptr_t` values instead of pointers to avoid UB from pointer overflow (when pointer arithmetic wraps around the address space). - `KScheduler::Reload`: `thread->GetOwnerProcess()` can be `nullptr`; avoid calling methods on it in this case. (The existing code returns a garbage reference to a field, which is then passed into `LoadWatchpointArray`, and apparently it's never used, so it's harmless in practice but still triggers UBSan.) - `KAutoObject::Close`: This function calls `this->Destroy()`, which overwrites the beginning of the object with junk (specifically a free list pointer). Then it calls `this->UnregisterWithKernel()`. UBSan complains about a type mismatch because the vtable has been overwritten, and I believe this is indeed UB. `UnregisterWithKernel` also loads `m_kernel` from the 'freed' object, which seems to be technically safe (the overwriting doesn't extend as far as that field), but seems dubious. Switch to a `static` method and load `m_kernel` in advance. |
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| .. | ||
| arm | ||
| crypto | ||
| debugger | ||
| file_sys | ||
| frontend | ||
| hid | ||
| hle | ||
| internal_network | ||
| loader | ||
| memory | ||
| tools | ||
| CMakeLists.txt | ||
| constants.cpp | ||
| constants.h | ||
| core.cpp | ||
| core.h | ||
| core_timing.cpp | ||
| core_timing.h | ||
| cpu_manager.cpp | ||
| cpu_manager.h | ||
| device_memory.cpp | ||
| device_memory.h | ||
| gpu_dirty_memory_manager.h | ||
| hardware_properties.h | ||
| memory.cpp | ||
| memory.h | ||
| perf_stats.cpp | ||
| perf_stats.h | ||
| precompiled_headers.h | ||
| reporter.cpp | ||
| reporter.h | ||
| telemetry_session.cpp | ||
| telemetry_session.h | ||