[wasm] Make DisassembleFunction a method of WasmCompiledModule

src/wasm/wasm-objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/wasm/wasm-objects.h"
 
 #include "src/wasm/module-decoder.h"
 #include "src/wasm/wasm-module.h"
+#include "src/wasm/wasm-text.h"
 
 #define TRACE(...)                                      \
   do {                                                  \
     if (FLAG_trace_wasm_instances) PrintF(__VA_ARGS__); \
   } while (false)
 
 #define TRACE_CHAIN(instance)        \
   do {                               \
     instance->PrintInstancesChain(); \
   } while (false)
@@ skipping 513 matching lines @@
       right = mid;
     }
   }
   // There should be an entry for each position that could show up on the stack
   // trace:
   DCHECK_EQ(total_offset,
             static_cast<uint32_t>(offset_table->get_int(2 * left)));
   return offset_table->get_int(2 * left + 1);
 }
 
+std::pair<std::string, std::vector<std::tuple<uint32_t, int, int>>>
+WasmCompiledModule::DisassembleFunction(int func_index) {
+  DisallowHeapAllocation no_gc;
+
+  if (func_index < 0 ||
+      static_cast<uint32_t>(func_index) >= module()->functions.size())
+    return {};
+
+  SeqOneByteString* module_bytes_str = ptr_to_module_bytes();
+  Vector<const byte> module_bytes(module_bytes_str->GetChars(),
+                                  module_bytes_str->length());
+
+  std::ostringstream disassembly_os;
+  std::vector<std::tuple<uint32_t, int, int>> offset_table;
+
+  PrintWasmText(module(), module_bytes, static_cast<uint32_t>(func_index),
+                disassembly_os, &offset_table);
+
+  return {disassembly_os.str(), std::move(offset_table)};
+}
+
 Handle<WasmInstanceWrapper> WasmInstanceWrapper::New(
     Isolate* isolate, Handle<WasmInstanceObject> instance) {
   Handle<FixedArray> array =
       isolate->factory()->NewFixedArray(kWrapperPropertyCount, TENURED);
   Handle<WasmInstanceWrapper> instance_wrapper(
       reinterpret_cast<WasmInstanceWrapper*>(*array), isolate);
   instance_wrapper->set_instance_object(instance, isolate);
   return instance_wrapper;
 }
 
@@ skipping 10 matching lines @@
       !array->get(kPreviousInstanceWrapper)->IsFixedArray())
     return false;
   return true;
 }
 
 void WasmInstanceWrapper::set_instance_object(Handle<JSObject> instance,
                                               Isolate* isolate) {
   Handle<WeakCell> cell = isolate->factory()->NewWeakCell(instance);
   set(kWrapperInstanceObject, *cell);
 }