report: print common items first for readability

PR-URL: https://github.com/nodejs/node/pull/27367
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

3 files changed, 38 insertions, 22 deletions

diff --git a/doc/api/report.md b/doc/api/report.md
index 90ec1b7f18..40e3050ee4 100644
--- a/doc/api/report.md
+++ b/doc/api/report.md
@@ -190,13 +190,13 @@ is provided below for reference.
       "details": ""
     },
     {
-      "repeat": 0,
-      "firesInMsFromNow": 94403548320796,
-      "expired": true,
       "type": "timer",
       "is_active": false,
       "is_referenced": false,
-      "address": "0x00007fff5fbfeab0"
+      "address": "0x00007fff5fbfeab0",
+      "repeat": 0,
+      "firesInMsFromNow": 94403548320796,
+      "expired": true
     },
     {
       "type": "check",
@@ -229,36 +229,36 @@ is provided below for reference.
       "address": "0x000000010188f2e0"
     },
     {
+      "type": "tty",
+      "is_active": false,
+      "is_referenced": true,
+      "address": "0x000055b581db0e18",
       "width": 204,
       "height": 55,
       "fd": 17,
       "writeQueueSize": 0,
       "readable": true,
-      "writable": true,
-      "type": "tty",
-      "is_active": false,
-      "is_referenced": true,
-      "address": "0x000055b581db0e18"
+      "writable": true
     },
     {
-      "signum": 28,
-      "signal": "SIGWINCH",
       "type": "signal",
       "is_active": true,
       "is_referenced": false,
-      "address": "0x000055b581d80010"
+      "address": "0x000055b581d80010",
+      "signum": 28,
+      "signal": "SIGWINCH"
     },
     {
+      "type": "tty",
+      "is_active": true,
+      "is_referenced": true,
+      "address": "0x000055b581df59f8",
       "width": 204,
       "height": 55,
       "fd": 19,
       "writeQueueSize": 0,
       "readable": true,
-      "writable": true,
-      "type": "tty",
-      "is_active": true,
-      "is_referenced": true,
-      "address": "0x000055b581df59f8"
+      "writable": true
     },
     {
       "type": "loop",
diff --git a/src/node_report_utils.cc b/src/node_report_utils.cc
index 81fdeda040..24f3b6175d 100644
--- a/src/node_report_utils.cc
+++ b/src/node_report_utils.cc
@@ -126,6 +126,11 @@ void WalkHandle(uv_handle_t* h, void* arg) {
   uv_any_handle* handle = reinterpret_cast<uv_any_handle*>(h);
 
   writer->json_start();
+  writer->json_keyvalue("type", type);
+  writer->json_keyvalue("is_active", static_cast<bool>(uv_is_active(h)));
+  writer->json_keyvalue("is_referenced", static_cast<bool>(uv_has_ref(h)));
+  writer->json_keyvalue("address",
+                        ValueToHexString(reinterpret_cast<uint64_t>(h)));
 
   switch (h->type) {
     case UV_FS_EVENT:
@@ -216,11 +221,6 @@ void WalkHandle(uv_handle_t* h, void* arg) {
                           static_cast<bool>(uv_is_writable(&handle->stream)));
   }
 
-  writer->json_keyvalue("type", type);
-  writer->json_keyvalue("is_active", static_cast<bool>(uv_is_active(h)));
-  writer->json_keyvalue("is_referenced", static_cast<bool>(uv_has_ref(h)));
-  writer->json_keyvalue("address",
-                        ValueToHexString(reinterpret_cast<uint64_t>(h)));
   writer->json_end();
 }
 
diff --git a/test/report/test-report-uv-handles.js b/test/report/test-report-uv-handles.js
index f03791f134..5167716894 100644
--- a/test/report/test-report-uv-handles.js
+++ b/test/report/test-report-uv-handles.js
@@ -97,6 +97,22 @@ if (process.argv[2] === 'child') {
     const reports = helper.findReports(child.pid, tmpdir.path);
     assert.deepStrictEqual(reports, [], report_msg, reports);
 
+    // Test libuv handle key order
+    {
+      const get_libuv = /"libuv":\s\[([\s\S]*?)\]/gm;
+      const get_handle_inner = /{([\s\S]*?),*?}/gm;
+      const libuv_handles_str = get_libuv.exec(stdout)[1];
+      const libuv_handles_array = libuv_handles_str.match(get_handle_inner);
+      for (const i of libuv_handles_array) {
+        // Exclude nested structure
+        if (i.includes('type')) {
+          const handle_keys = i.match(/(".*"):/gm);
+          assert(handle_keys[0], 'type');
+          assert(handle_keys[1], 'is_active');
+        }
+      }
+    }
+
     const report = JSON.parse(stdout);
     const prefix = common.isWindows ? '\\\\?\\' : '';
     const expected_filename = `${prefix}${__filename}`;