report: use DiagnosticFilename for default filename

PR-URL: #26647
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

doc/api/report.md

@@ -24,7 +24,7 @@ is provided below for reference.
   "header": {
     "event": "exception",
     "trigger": "Exception",
-    "filename": "report.20181221.005011.8974.001.json",
+    "filename": "report.20181221.005011.8974.0.001.json",
     "dumpEventTime": "2018-12-21T00:50:11Z",
     "dumpEventTimeStamp": "1545371411331",
     "processId": 8974,
@@ -471,7 +471,7 @@ triggered using the Node.js REPL:
 ```raw
 $ node
 > process.report.writeReport();
-Writing Node.js report to file: report.20181126.091102.8480.001.json
+Writing Node.js report to file: report.20181126.091102.8480.0.001.json
 Node.js report completed
 >
 ```

src/node_report.cc

@@ -43,6 +43,7 @@ constexpr double SEC_PER_MICROS = 1e-6;
 
 namespace report {
 using node::arraysize;
+using node::DiagnosticFilename;
 using node::Environment;
 using node::Mutex;
 using node::NativeSymbolDebuggingContext;
@@ -92,46 +93,26 @@ std::string TriggerNodeReport(Isolate* isolate,
                               const char* trigger,
                               const std::string& name,
                               Local<String> stackstr) {
-  std::ostringstream oss;
   std::string filename;
   std::shared_ptr<PerIsolateOptions> options;
   if (env != nullptr) options = env->isolate_data()->options();
 
-  // Obtain the current time and the pid (platform dependent)
+  // Obtain the current time.
   TIME_TYPE tm_struct;
   LocalTime(&tm_struct);
   // Determine the required report filename. In order of priority:
   //   1) supplied on API 2) configured on startup 3) default generated
   if (!name.empty()) {
-    // Filename was specified as API parameter, use that
-    oss << name;
+    // Filename was specified as API parameter.
+    filename = name;
   } else if (env != nullptr && options->report_filename.length() > 0) {
-    // File name was supplied via start-up option, use that
-    oss << options->report_filename;
+    // File name was supplied via start-up option.
+    filename = options->report_filename;
   } else {
-    // Construct the report filename, with timestamp, pid and sequence number
-    oss << "report";
-#ifdef _WIN32
-    oss << "." << std::setfill('0') << std::setw(4) << tm_struct.wYear;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.wMonth;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.wDay;
-    oss << "." << std::setfill('0') << std::setw(2) << tm_struct.wHour;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.wMinute;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.wSecond;
-#else  // UNIX, OSX
-    oss << "." << std::setfill('0') << std::setw(4) << tm_struct.tm_year + 1900;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.tm_mon + 1;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.tm_mday;
-    oss << "." << std::setfill('0') << std::setw(2) << tm_struct.tm_hour;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.tm_min;
-    oss << std::setfill('0') << std::setw(2) << tm_struct.tm_sec;
-#endif
-    oss << "." << uv_os_getpid();
-    oss << "." << std::setfill('0') << std::setw(3) << ++seq;
-    oss << ".json";
+    filename = *DiagnosticFilename(env != nullptr ? env->thread_id() : 0,
+                                   "report", "json", seq++);
   }
 
-  filename = oss.str();
   // Open the report file stream for writing. Supports stdout/err,
   // user-specified or (default) generated name
   std::ofstream outfile;

test/common/report.js

@@ -7,8 +7,8 @@ const path = require('path');
 
 function findReports(pid, dir) {
   // Default filenames are of the form
-  // report.<date>.<time>.<pid>.<seq>.json
-  const format = '^report\\.\\d+\\.\\d+\\.' + pid + '\\.\\d+\\.json$';
+  // report.<date>.<time>.<pid>.<tid>.<seq>.json
+  const format = '^report\\.\\d+\\.\\d+\\.' + pid + '\\.\\d+\\.\\d+\\.json$';
   const filePattern = new RegExp(format);
   const files = fs.readdirSync(dir);
   const results = [];