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Merge pull request #6573 from stenzek/bad-shader-uid-cache

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ShaderCache: Improve shader UID cache file reliability
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Stenzek 2018-04-03 01:00:09 +10:00 committed by GitHub
commit 9924434cdf
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 6 deletions
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20
Source/Core/VideoCommon/ShaderCache.cpp
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@ -552,6 +552,7 @@ void ShaderCache::LoadPipelineUIDCache()
// If an existing case exists, validate the version before reading entries.
u32 existing_magic;
u32 existing_version;
bool uid_file_valid = false;
if (m_gx_pipeline_uid_cache_file.ReadBytes(&existing_magic, sizeof(existing_magic)) &&
m_gx_pipeline_uid_cache_file.ReadBytes(&existing_version, sizeof(existing_version)) &&
existing_magic == CACHE_FILE_MAGIC && existing_version == GX_PIPELINE_UID_VERSION)
@ -563,7 +564,7 @@ void ShaderCache::LoadPipelineUIDCache()
const size_t uid_count =
static_cast<size_t>(file_size - CACHE_HEADER_SIZE) / sizeof(SerializedGXPipelineUid);
const size_t expected_size = uid_count * sizeof(SerializedGXPipelineUid) + CACHE_HEADER_SIZE;
bool uid_file_valid = file_size == expected_size;
uid_file_valid = file_size == expected_size;
if (uid_file_valid)
{
for (size_t i = 0; i < uid_count; i++)
@ -583,13 +584,14 @@ void ShaderCache::LoadPipelineUIDCache()
}
// We open the file for reading and writing, so we must seek to the end before writing.
if (!uid_file_valid || !m_gx_pipeline_uid_cache_file.Seek(expected_size, SEEK_SET))
{
// Close the file. We re-open and truncate it below.
if (uid_file_valid)
uid_file_valid = m_gx_pipeline_uid_cache_file.Seek(expected_size, SEEK_SET);
}
// If the file is invalid, close it. We re-open and truncate it below.
if (!uid_file_valid)
m_gx_pipeline_uid_cache_file.Close();
}
}
}
// If the file is not open, it means it was either corrupted or didn't exist.
if (!m_gx_pipeline_uid_cache_file.IsOpen())
@ -600,6 +602,12 @@ void ShaderCache::LoadPipelineUIDCache()
m_gx_pipeline_uid_cache_file.WriteBytes(&CACHE_FILE_MAGIC, sizeof(GX_PIPELINE_UID_VERSION));
m_gx_pipeline_uid_cache_file.WriteBytes(&GX_PIPELINE_UID_VERSION,
sizeof(GX_PIPELINE_UID_VERSION));
// Write any current UIDs out to the file.
// This way, if we load a UID cache where the data was incomplete (e.g. Dolphin crashed),
// we don't lose the existing UIDs which were previously at the beginning.
for (const auto& it : m_gx_pipeline_cache)
AppendGXPipelineUID(it.first);
}
}