[wasm] Print instruction range if disassembler is disabled

Even if the instructions cannot be dissembled, it still often helps to
know which range of instructions belongs to which function. Thus print
this information on --print-wasm-code if the disassembler is not
available.

R=thibaudm@chromium.org

Change-Id: I9e7a4cb6ae4edf3411740fe4dfee248a5b9439ec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3563564Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79734}

src/wasm/wasm-code-manager.cc

@@ -388,7 +388,6 @@ void WasmCode::Disassemble(const char* name, std::ostream& os,
   os << "Body (size = " << instructions().size() << " = "
      << unpadded_binary_size_ << " + " << padding << " padding)\n";
 
-#ifdef ENABLE_DISASSEMBLER
   int instruction_size = unpadded_binary_size_;
   if (constant_pool_offset_ < instruction_size) {
     instruction_size = constant_pool_offset_;
@@ -400,6 +399,8 @@ void WasmCode::Disassemble(const char* name, std::ostream& os,
     instruction_size = handler_table_offset_;
   }
   DCHECK_LT(0, instruction_size);
+
+#ifdef ENABLE_DISASSEMBLER
   os << "Instructions (size = " << instruction_size << ")\n";
   Disassembler::Decode(nullptr, os, instructions().begin(),
                        instructions().begin() + instruction_size,
@@ -446,7 +447,11 @@ void WasmCode::Disassemble(const char* name, std::ostream& os,
     it.rinfo()->Print(nullptr, os);
   }
   os << "\n";
-#endif  // ENABLE_DISASSEMBLER
+#else   // !ENABLE_DISASSEMBLER
+  os << "Instructions (size = " << instruction_size << ", "
+     << static_cast<void*>(instructions().begin()) << "-"
+     << static_cast<void*>(instructions().begin() + instruction_size) << ")\n";
+#endif  // !ENABLE_DISASSEMBLER
 }
 
 const char* GetWasmCodeKindAsString(WasmCode::Kind kind) {