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Fix JitCache.Unmap called with the same address freeing memory in use (#5937)

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gdkchan 2023-11-16 17:52:21 -03:00 committed by GitHub
parent d11fe26aa3
commit 82a638230e
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 9 additions and 23 deletions
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30
src/ARMeilleure/Translation/Cache/JitCache.cs
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@ -117,12 +117,11 @@ namespace ARMeilleure.Translation.Cache
int funcOffset = (int)(pointer.ToInt64() - _jitRegion.Pointer.ToInt64());
bool result = TryFind(funcOffset, out CacheEntry entry);
Debug.Assert(result);
_cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
Remove(funcOffset);
if (TryFind(funcOffset, out CacheEntry entry, out int entryIndex) && entry.Offset == funcOffset)
{
_cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
_cacheEntries.RemoveAt(entryIndex);
}
}
}
@ -181,22 +180,7 @@ namespace ARMeilleure.Translation.Cache
_cacheEntries.Insert(index, entry);
}
private static void Remove(int offset)
{
int index = _cacheEntries.BinarySearch(new CacheEntry(offset, 0, default));
if (index < 0)
{
index = ~index - 1;
}
if (index >= 0)
{
_cacheEntries.RemoveAt(index);
}
}
public static bool TryFind(int offset, out CacheEntry entry)
public static bool TryFind(int offset, out CacheEntry entry, out int entryIndex)
{
lock (_lock)
{
@ -210,11 +194,13 @@ namespace ARMeilleure.Translation.Cache
if (index >= 0)
{
entry = _cacheEntries[index];
entryIndex = index;
return true;
}
}
entry = default;
entryIndex = 0;
return false;
}
}

2
src/ARMeilleure/Translation/Cache/JitUnwindWindows.cs
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@ -95,7 +95,7 @@ namespace ARMeilleure.Translation.Cache
{
int offset = (int)((long)controlPc - context.ToInt64());
if (!JitCache.TryFind(offset, out CacheEntry funcEntry))
if (!JitCache.TryFind(offset, out CacheEntry funcEntry, out _))
{
return null; // Not found.
}