Add new relocation type WASM_MEMORY_SIZE_REFERENCE, use relocatable pointers to update wasm memory …

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 31d87c84f6fb01832dab8cd3b5359f59abe894f7..9e1e2ed12d7e22284957fd9e7c3ad49cdcd4823f 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -384,9 +384,10 @@ class RelocInfo {
     CODE_TARGET_WITH_ID,
     DEBUGGER_STATEMENT,  // Code target for the debugger statement.
     EMBEDDED_OBJECT,
-    CELL,
     // To relocate pointers into the wasm memory embedded in wasm code
     WASM_MEMORY_REFERENCE,
+    WASM_MEMORY_SIZE_REFERENCE,
+    CELL,
 
     // Everything after runtime_entry (inclusive) is not GC'ed.
     RUNTIME_ENTRY,
@@ -430,7 +431,7 @@ class RelocInfo {
     FIRST_REAL_RELOC_MODE = CODE_TARGET,
     LAST_REAL_RELOC_MODE = VENEER_POOL,
     LAST_CODE_ENUM = DEBUGGER_STATEMENT,
-    LAST_GCED_ENUM = WASM_MEMORY_REFERENCE,
+    LAST_GCED_ENUM = WASM_MEMORY_SIZE_REFERENCE,
     FIRST_SHAREABLE_RELOC_MODE = CELL,
   };
 
@@ -521,6 +522,9 @@ class RelocInfo {
   static inline bool IsWasmMemoryReference(Mode mode) {
     return mode == WASM_MEMORY_REFERENCE;
   }
+  static inline bool IsWasmMemorySizeReference(Mode mode) {
+    return mode == WASM_MEMORY_SIZE_REFERENCE;
+  }
   static inline int ModeMask(Mode mode) { return 1 << mode; }
 
   // Accessors
@@ -582,8 +586,9 @@ class RelocInfo {
                                     FLUSH_ICACHE_IF_NEEDED));
 
   INLINE(Address wasm_memory_reference());
+  INLINE(int32_t wasm_memory_size_reference());
   INLINE(void update_wasm_memory_reference(
-      Address old_base, Address new_base, size_t old_size, size_t new_size,
+      Address old_base, Address new_base, int32_t old_size, int32_t new_size,
       ICacheFlushMode icache_flush_mode = SKIP_ICACHE_FLUSH));
   // Returns the address of the constant pool entry where the target address
   // is held.  This should only be called if IsInConstantPool returns true.