1 files changed, 21 insertions, 1 deletions
diff --git a/deps/v8/src/wasm/wasm-memory.h b/deps/v8/src/wasm/wasm-memory.h
index 2676f3ade7..c5d6ef5154 100644
--- a/deps/v8/src/wasm/wasm-memory.h
+++ b/deps/v8/src/wasm/wasm-memory.h
@@ -13,8 +13,28 @@ namespace v8 {
 namespace internal {
 namespace wasm {
 
+class WasmAllocationTracker {
+ public:
+  WasmAllocationTracker() {}
+  ~WasmAllocationTracker();
+
+  // ReserveAddressSpace attempts to increase the reserved address space counter
+  // to determine whether there is enough headroom to allocate another guarded
+  // Wasm memory. Returns true if successful (meaning it is okay to go ahead and
+  // allocate the buffer), false otherwise.
+  bool ReserveAddressSpace(size_t num_bytes);
+
+  // Reduces the address space counter so that the space can be reused.
+  void ReleaseAddressSpace(size_t num_bytes);
+
+ private:
+  std::atomic_size_t allocated_address_space_{0};
+
+  DISALLOW_COPY_AND_ASSIGN(WasmAllocationTracker);
+};
+
 Handle<JSArrayBuffer> NewArrayBuffer(
-    Isolate*, size_t size, bool enable_guard_regions,
+    Isolate*, size_t size, bool require_guard_regions,
     SharedFlag shared = SharedFlag::kNotShared);
 
 Handle<JSArrayBuffer> SetupArrayBuffer(