[wasm] Prerequisites for WebAssembly Table.Grow

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 316 matching lines @@
     DCHECK_GE(wasm_memory_reference(), old_base);
     updated_reference = new_base + (wasm_memory_reference() - old_base);
     // The reference is not checked here but at runtime. Validity of references
     // may change over time.
     unchecked_update_wasm_memory_reference(updated_reference,
                                            icache_flush_mode);
   } else if (IsWasmMemorySizeReference(rmode_)) {
     uint32_t current_size_reference = wasm_memory_size_reference();
     uint32_t updated_size_reference =
         new_size + (current_size_reference - old_size);
-    unchecked_update_wasm_memory_size(updated_size_reference,
-                                      icache_flush_mode);
+    unchecked_update_wasm_size(updated_size_reference, icache_flush_mode);
   } else {
     UNREACHABLE();
   }
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
     Assembler::FlushICache(isolate_, pc_, sizeof(int64_t));
   }
 }
 
 void RelocInfo::update_wasm_global_reference(
     Address old_base, Address new_base, ICacheFlushMode icache_flush_mode) {
   DCHECK(IsWasmGlobalReference(rmode_));
   Address updated_reference;
   DCHECK(reinterpret_cast<uintptr_t>(old_base) <=
          reinterpret_cast<uintptr_t>(wasm_global_reference()));
   updated_reference = new_base + (wasm_global_reference() - old_base);
   DCHECK(reinterpret_cast<uintptr_t>(new_base) <=
          reinterpret_cast<uintptr_t>(updated_reference));
   unchecked_update_wasm_memory_reference(updated_reference, icache_flush_mode);
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
     Assembler::FlushICache(isolate_, pc_, sizeof(int32_t));
   }
 }
 
+void RelocInfo::update_wasm_function_table_size_reference(
+    uint32_t old_size, uint32_t new_size, ICacheFlushMode icache_flush_mode) {
+  DCHECK(IsWasmFunctionTableSizeReference(rmode_));
+  uint32_t current_size_reference = wasm_function_table_size_reference();
+  uint32_t updated_size_reference =
+      new_size + (current_size_reference - old_size);
+  unchecked_update_wasm_size(updated_size_reference, icache_flush_mode);
+  if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
+    Assembler::FlushICache(isolate_, pc_, sizeof(int64_t));
+  }
+}
+
 void RelocInfo::set_target_address(Address target,
                                    WriteBarrierMode write_barrier_mode,
                                    ICacheFlushMode icache_flush_mode) {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
   Assembler::set_target_address_at(isolate_, pc_, host_, target,
                                    icache_flush_mode);
   if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL &&
       IsCodeTarget(rmode_)) {
     Object* target_code = Code::GetCodeFromTargetAddress(target);
     host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
@@ skipping 390 matching lines @@
     case DEBUG_BREAK_SLOT_AT_TAIL_CALL:
       return "debug break slot at tail call";
     case CODE_AGE_SEQUENCE:
       return "code age sequence";
     case WASM_MEMORY_REFERENCE:
       return "wasm memory reference";
     case WASM_MEMORY_SIZE_REFERENCE:
       return "wasm memory size reference";
     case WASM_GLOBAL_REFERENCE:
       return "wasm global value reference";
+    case WASM_FUNCTION_TABLE_SIZE_REFERENCE:
+      return "wasm function table size reference";
     case NUMBER_OF_MODES:
     case PC_JUMP:
       UNREACHABLE();
       return "number_of_modes";
   }
   return "unknown relocation type";
 }
 
 
 void RelocInfo::Print(Isolate* isolate, std::ostream& os) {  // NOLINT
@@ skipping 77 matching lines @@
     case DEOPT_ID:
     case CONST_POOL:
     case VENEER_POOL:
     case DEBUG_BREAK_SLOT_AT_POSITION:
     case DEBUG_BREAK_SLOT_AT_RETURN:
     case DEBUG_BREAK_SLOT_AT_CALL:
     case DEBUG_BREAK_SLOT_AT_TAIL_CALL:
     case WASM_MEMORY_REFERENCE:
     case WASM_MEMORY_SIZE_REFERENCE:
     case WASM_GLOBAL_REFERENCE:
+    case WASM_FUNCTION_TABLE_SIZE_REFERENCE:
     case NONE32:
     case NONE64:
       break;
     case NUMBER_OF_MODES:
     case PC_JUMP:
       UNREACHABLE();
       break;
     case CODE_AGE_SEQUENCE:
       DCHECK(Code::IsYoungSequence(isolate, pc_) || code_age_stub()->IsCode());
       break;
@@ skipping 1039 matching lines @@
 
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 }  // namespace internal
 }  // namespace v8