1 files changed, 25 insertions, 3 deletions

diff --git a/chromium/v8/src/wasm/wasm-objects.h b/chromium/v8/src/wasm/wasm-objects.h
index c526a909b1e..b198cf27551 100644
--- a/chromium/v8/src/wasm/wasm-objects.h
+++ b/chromium/v8/src/wasm/wasm-objects.h
@@ -44,6 +44,7 @@ class WasmInstanceWrapper;
 // Representation of a WebAssembly.Module JavaScript-level object.
 class WasmModuleObject : public JSObject {
  public:
+  // If a second field is added, we need a kWrapperTracerHeader field as well.
   // TODO(titzer): add the brand as an internal field instead of a property.
   enum Fields { kCompiledModule, kFieldCount };
 
@@ -58,8 +59,15 @@ class WasmModuleObject : public JSObject {
 // Representation of a WebAssembly.Table JavaScript-level object.
 class WasmTableObject : public JSObject {
  public:
+  // The 0-th field is used by the Blink Wrapper Tracer.
   // TODO(titzer): add the brand as an internal field instead of a property.
-  enum Fields { kFunctions, kMaximum, kDispatchTables, kFieldCount };
+  enum Fields {
+    kWrapperTracerHeader,
+    kFunctions,
+    kMaximum,
+    kDispatchTables,
+    kFieldCount
+  };
 
   DECLARE_CASTS(WasmTableObject);
   DECLARE_ACCESSORS(functions, FixedArray);
@@ -83,8 +91,15 @@ class WasmTableObject : public JSObject {
 // Representation of a WebAssembly.Memory JavaScript-level object.
 class WasmMemoryObject : public JSObject {
  public:
+  // The 0-th field is used by the Blink Wrapper Tracer.
   // TODO(titzer): add the brand as an internal field instead of a property.
-  enum Fields : uint8_t { kArrayBuffer, kMaximum, kInstancesLink, kFieldCount };
+  enum Fields : uint8_t {
+    kWrapperTracerHeader,
+    kArrayBuffer,
+    kMaximum,
+    kInstancesLink,
+    kFieldCount
+  };
 
   DECLARE_CASTS(WasmMemoryObject);
   DECLARE_ACCESSORS(buffer, JSArrayBuffer);
@@ -107,8 +122,10 @@ class WasmMemoryObject : public JSObject {
 // Representation of a WebAssembly.Instance JavaScript-level object.
 class WasmInstanceObject : public JSObject {
  public:
+  // The 0-th field is used by the Blink Wrapper Tracer.
   // TODO(titzer): add the brand as an internal field instead of a property.
   enum Fields {
+    kWrapperTracerHeader,
     kCompiledModule,
     kMemoryObject,
     kMemoryArrayBuffer,
@@ -142,7 +159,8 @@ class WasmInstanceObject : public JSObject {
 // Representation of an exported WASM function.
 class WasmExportedFunction : public JSFunction {
  public:
-  enum Fields { kInstance, kIndex, kFieldCount };
+  // The 0-th field is used by the Blink Wrapper Tracer.
+  enum Fields { kWrapperTracerHeader, kInstance, kIndex, kFieldCount };
 
   DECLARE_CASTS(WasmExportedFunction);
 
@@ -158,7 +176,9 @@ class WasmExportedFunction : public JSFunction {
 
 // Information shared by all WasmCompiledModule objects for the same module.
 class WasmSharedModuleData : public FixedArray {
+  // The 0-th field is used by the Blink Wrapper Tracer.
   enum Fields {
+    kWrapperTracerHeader,
     kModuleWrapper,
     kModuleBytes,
     kScript,
@@ -408,7 +428,9 @@ class WasmCompiledModule : public FixedArray {
 
 class WasmDebugInfo : public FixedArray {
  public:
+  // The 0-th field is used by the Blink Wrapper Tracer.
   enum Fields {
+    kWrapperTracerHeader,
     kInstance,
     kInterpreterHandle,
     kInterpretedFunctions,