diff options
author | Lars Knoll <lars.knoll@qt.io> | 2017-02-08 16:21:02 +0100 |
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committer | Lars Knoll <lars.knoll@qt.io> | 2017-03-09 08:59:20 +0000 |
commit | 2a554434a571dcefd26cf10ef8c5ae8b3b7d66db (patch) | |
tree | 5532f0a0206fbbde0a3099ff1e0ee58188a97275 /src/qml/memory/qv4mmdefs_p.h | |
parent | 05de4e044f92dd278a00e410be8f070bc4d66e6f (diff) |
Implement a real write barrier
Implement a Steel write barrier for our objects. The barrier is
interesting as it can also be used for incremental GC runs by
simply turning the barrier on and leaving old objects marked as
black.
Change-Id: I0b273974d94a990dee3cd9298089b8b202c75bf2
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Diffstat (limited to 'src/qml/memory/qv4mmdefs_p.h')
-rw-r--r-- | src/qml/memory/qv4mmdefs_p.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/qml/memory/qv4mmdefs_p.h b/src/qml/memory/qv4mmdefs_p.h index 3f65e97d86..987e669040 100644 --- a/src/qml/memory/qv4mmdefs_p.h +++ b/src/qml/memory/qv4mmdefs_p.h @@ -255,6 +255,17 @@ Q_STATIC_ASSERT(sizeof(HeapItem) == Chunk::SlotSize); Q_STATIC_ASSERT(QT_POINTER_SIZE*8 == Chunk::Bits); Q_STATIC_ASSERT((1 << Chunk::BitShift) == Chunk::Bits); +// Base class for the execution engine + +struct EngineBase { + Heap::ExecutionContext *current = 0; + + Value *jsStackTop = 0; + quint8 hasException = false; + quint8 writeBarrierActive = false; + quint16 unused = 0; +}; + // Some helper classes and macros to automate the generation of our // tables used for marking objects |