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https://github.com/par274/sharpemu.git
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1be009ce40
* [HLE] Trigger AGC graphics events by filter instead of exact ident (#173) The PM4 EVENT_WRITE packet carries a 6-bit hardware EVENT_TYPE, but the guest registers AGC events via sceAgcDriverAddEqEvent with a full guest eventId. These two values are not the same numbering scheme, so the exact ident lookup in TriggerRegisteredEvents never matched and the AGC interrupt thread hung forever. Add TriggerRegisteredEventsByFilter, which wakes every graphics event registration on every queue. This is a compatibility workaround for issue #173 while the real PS5 mapping remains unknown. Includes unit tests covering the mismatched ident/eventType case. * [HLE] Fix POSIX condition variable semantics (#113) Remove PendingSignals from PthreadCondState. POSIX condition signals are edges, not semaphore credits - a signal with no waiter must have no effect. The previous implementation persisted signals, causing lock inversions and predicate bypasses. Changes: - Remove PendingSignals property and TryConsumePendingSignal method - Remove pending signal consumption logic from PthreadCondWaitCore - Remove PendingSignals increment from PthreadCondSignalCore - Add regression tests verifying POSIX-correct behavior Fixes #113
83 lines
3.3 KiB
C#
83 lines
3.3 KiB
C#
// Copyright (C) 2026 SharpEmu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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using System.Reflection;
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using SharpEmu.HLE;
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using SharpEmu.Libs.Kernel;
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using Xunit;
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namespace SharpEmu.Libs.Tests.Pthread;
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// POSIX condition variables are edges, not semaphore credits. A signal with no waiter
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// must have no effect. This was violated by the previous implementation which persisted
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// signals via PendingSignals, causing lock inversions and predicate bypasses.
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// See issue #113.
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public sealed class PthreadCondSemanticsTests
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{
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[Fact]
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public void PthreadCondState_DoesNotHavePendingSignals()
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{
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// Verify that PthreadCondState no longer has the PendingSignals property.
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// This is a regression test to ensure the POSIX-correct behavior is maintained.
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var stateType = typeof(KernelPthreadCompatExports).GetNestedType("PthreadCondState", BindingFlags.NonPublic);
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Assert.NotNull(stateType);
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var pendingSignalsProp = stateType.GetProperty("PendingSignals");
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Assert.Null(pendingSignalsProp);
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var tryConsumeMethod = stateType.GetMethod("TryConsumePendingSignal");
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Assert.Null(tryConsumeMethod);
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}
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[Fact]
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public void PthreadCondSignal_WithNoWaiter_DoesNotPersist()
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{
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// This test verifies the semantic contract: signal without waiter is a no-op.
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// We can't easily test the full pthread flow without the scheduler, but we can
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// verify the code path by checking that SignalEpoch advances but no state persists.
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var stateType = typeof(KernelPthreadCompatExports).GetNestedType("PthreadCondState", BindingFlags.NonPublic);
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Assert.NotNull(stateType);
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// Create an instance via reflection
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var state = Activator.CreateInstance(stateType);
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Assert.NotNull(state);
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var syncRootProp = stateType.GetProperty("SyncRoot");
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var signalEpochProp = stateType.GetProperty("SignalEpoch");
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var waitersProp = stateType.GetProperty("Waiters");
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Assert.NotNull(syncRootProp);
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Assert.NotNull(signalEpochProp);
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Assert.NotNull(waitersProp);
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var syncRoot = syncRootProp.GetValue(state);
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Assert.NotNull(syncRoot);
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// Initial state
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Assert.Equal(0UL, (ulong)signalEpochProp.GetValue(state)!);
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Assert.Equal(0, (int)waitersProp.GetValue(state)!);
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// Simulate signal with no waiter (this would have incremented PendingSignals before)
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lock (syncRoot)
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{
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signalEpochProp.SetValue(state, (ulong)signalEpochProp.GetValue(state)! + 1);
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// Note: we don't increment PendingSignals because it doesn't exist
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}
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// Verify epoch advanced but no persistent signal state
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Assert.Equal(1UL, (ulong)signalEpochProp.GetValue(state)!);
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// A new waiter arriving should see the new epoch but not consume any "pending" signal
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// (because there's no such concept anymore)
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lock (syncRoot)
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{
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var observedEpoch = (ulong)signalEpochProp.GetValue(state)!;
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waitersProp.SetValue(state, (int)waitersProp.GetValue(state)! + 1);
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// Waiter sees epoch=1, will block until epoch changes again
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Assert.Equal(1UL, observedEpoch);
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Assert.Equal(1, (int)waitersProp.GetValue(state)!);
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}
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}
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}
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