From a26dfb323b1090fe6a003e92f4ecf9efd3498f0f Mon Sep 17 00:00:00 2001
From: Joyee Cheung <joyeec9h3@gmail.com>
Date: Thu, 28 Jan 2021 21:22:09 +0800
Subject: [PATCH] src: expose BaseObject::kInternalFieldCount in post-mortem
 metadata

So that the debugger does not have to hard-code the number of
internal fields of BaseObjects.

PR-URL: https://github.com/nodejs/node/pull/37111
Refs: https://github.com/nodejs/node/pull/36943
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 src/node_postmortem_metadata.cc              |  3 +++
 test/cctest/test_node_postmortem_metadata.cc | 16 +++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/node_postmortem_metadata.cc b/src/node_postmortem_metadata.cc
index ccb347e95175c1..2dc534f59bf80a 100644
--- a/src/node_postmortem_metadata.cc
+++ b/src/node_postmortem_metadata.cc
@@ -36,6 +36,7 @@
 
 extern "C" {
 int nodedbg_const_ContextEmbedderIndex__kEnvironment__int;
+int nodedbg_const_BaseObject__kInternalFieldCount__int;
 uintptr_t nodedbg_offset_ExternalString__data__uintptr_t;
 uintptr_t nodedbg_offset_ReqWrap__req_wrap_queue___ListNode_ReqWrapQueue;
 
@@ -50,6 +51,8 @@ namespace node {
 int GenDebugSymbols() {
   nodedbg_const_ContextEmbedderIndex__kEnvironment__int =
       ContextEmbedderIndex::kEnvironment;
+  nodedbg_const_BaseObject__kInternalFieldCount__int =
+      BaseObject::kInternalFieldCount;
 
   nodedbg_offset_ExternalString__data__uintptr_t = NODE_OFF_EXTSTR_DATA;
   nodedbg_offset_ReqWrap__req_wrap_queue___ListNode_ReqWrapQueue =
diff --git a/test/cctest/test_node_postmortem_metadata.cc b/test/cctest/test_node_postmortem_metadata.cc
index 3fb67ecbca265e..4cee7db4c8ee5b 100644
--- a/test/cctest/test_node_postmortem_metadata.cc
+++ b/test/cctest/test_node_postmortem_metadata.cc
@@ -14,6 +14,7 @@ extern uintptr_t
     nodedbg_offset_Environment__handle_wrap_queue___Environment_HandleWrapQueue;
 extern int debug_symbols_generated;
 extern int nodedbg_const_ContextEmbedderIndex__kEnvironment__int;
+extern int nodedbg_const_BaseObject__kInternalFieldCount__int;
 extern uintptr_t
     nodedbg_offset_Environment_HandleWrapQueue__head___ListNode_HandleWrap;
 extern uintptr_t
@@ -68,6 +69,12 @@ TEST_F(DebugSymbolsTest, ContextEmbedderEnvironmentIndex) {
             kEnvironmentIndex);
 }
 
+TEST_F(DebugSymbolsTest, BaseObjectkInternalFieldCount) {
+  int kInternalFieldCount = node::BaseObject::kInternalFieldCount;
+  EXPECT_EQ(nodedbg_const_BaseObject__kInternalFieldCount__int,
+            kInternalFieldCount);
+}
+
 TEST_F(DebugSymbolsTest, ExternalStringDataOffset) {
   EXPECT_EQ(nodedbg_offset_ExternalString__data__uintptr_t,
             NODE_OFF_EXTSTR_DATA);
@@ -89,7 +96,8 @@ TEST_F(DebugSymbolsTest, BaseObjectPersistentHandle) {
   Env env{handle_scope, argv};
 
   v8::Local<v8::ObjectTemplate> obj_templ = v8::ObjectTemplate::New(isolate_);
-  obj_templ->SetInternalFieldCount(1);
+  obj_templ->SetInternalFieldCount(
+      nodedbg_const_BaseObject__kInternalFieldCount__int);
 
   v8::Local<v8::Object> object =
       obj_templ->NewInstance(env.context()).ToLocalChecked();
@@ -139,7 +147,8 @@ TEST_F(DebugSymbolsTest, HandleWrapList) {
   uv_tcp_t handle;
 
   auto obj_template = v8::FunctionTemplate::New(isolate_);
-  obj_template->InstanceTemplate()->SetInternalFieldCount(1);
+  obj_template->InstanceTemplate()->SetInternalFieldCount(
+      nodedbg_const_BaseObject__kInternalFieldCount__int);
 
   v8::Local<v8::Object> object = obj_template->GetFunction(env.context())
                                      .ToLocalChecked()
@@ -171,7 +180,8 @@ TEST_F(DebugSymbolsTest, ReqWrapList) {
   tail = *reinterpret_cast<uintptr_t*>(tail);
 
   auto obj_template = v8::FunctionTemplate::New(isolate_);
-  obj_template->InstanceTemplate()->SetInternalFieldCount(1);
+  obj_template->InstanceTemplate()->SetInternalFieldCount(
+      nodedbg_const_BaseObject__kInternalFieldCount__int);
 
   v8::Local<v8::Object> object = obj_template->GetFunction(env.context())
                                      .ToLocalChecked()