src: add errorProperties on process.report

PR-URL: #28426
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

lib/internal/process/execution.js

@@ -153,7 +153,7 @@ function createOnGlobalUncaughtException() {
           report.writeReport(er ? er.message : 'Exception',
                              'Exception',
                              null,
-                             er ? er.stack : undefined);
+                             er ? er : {});
         }
       } catch {}  // Ignore the exception. Diagnostic reporting is unavailable.
     }

lib/internal/process/report.js

@@ -25,15 +25,15 @@ const report = {
       throw new ERR_INVALID_ARG_TYPE('err', 'Object', err);
     }
 
-    return nr.writeReport('JavaScript API', 'API', file, err.stack);
+    return nr.writeReport('JavaScript API', 'API', file, err);
   },
   getReport(err) {
     if (err === undefined)
       err = new ERR_SYNTHETIC();
     else if (err === null || typeof err !== 'object')
       throw new ERR_INVALID_ARG_TYPE('err', 'Object', err);
 
-    return JSONParse(nr.getReport(err.stack));
+    return JSONParse(nr.getReport(err));
   },
   get directory() {
     return nr.getDirectory();

src/node_errors.cc

@@ -418,7 +418,7 @@ void OnFatalError(const char* location, const char* message) {
 
   if (report_on_fatalerror) {
     report::TriggerNodeReport(
-        isolate, env, message, "FatalError", "", Local<String>());
+        isolate, env, message, "FatalError", "", Local<Object>());
   }
 
   fflush(stderr);

src/node_report.cc

@@ -37,11 +37,18 @@ using node::Mutex;
 using node::NativeSymbolDebuggingContext;
 using node::TIME_TYPE;
 using node::worker::Worker;
+using v8::Array;
+using v8::Context;
 using v8::HeapSpaceStatistics;
 using v8::HeapStatistics;
 using v8::Isolate;
 using v8::Local;
+using v8::Number;
+using v8::Object;
+using v8::StackTrace;
 using v8::String;
+using v8::TryCatch;
+using v8::Value;
 using v8::V8;
 
 namespace per_process = node::per_process;
@@ -53,13 +60,16 @@ static void WriteNodeReport(Isolate* isolate,
                             const char* trigger,
                             const std::string& filename,
                             std::ostream& out,
-                            Local<String> stackstr,
+                            Local<Object> error,
                             bool compact);
 static void PrintVersionInformation(JSONWriter* writer);
-static void PrintJavaScriptStack(JSONWriter* writer,
-                                 Isolate* isolate,
-                                 Local<String> stackstr,
-                                 const char* trigger);
+static void PrintJavaScriptErrorStack(JSONWriter* writer,
+                                      Isolate* isolate,
+                                      Local<Object> error,
+                                      const char* trigger);
+static void PrintJavaScriptErrorProperties(JSONWriter* writer,
+                                           Isolate* isolate,
+                                           Local<Object> error);
 static void PrintNativeStack(JSONWriter* writer);
 static void PrintResourceUsage(JSONWriter* writer);
 static void PrintGCStatistics(JSONWriter* writer, Isolate* isolate);
@@ -76,7 +86,7 @@ std::string TriggerNodeReport(Isolate* isolate,
                               const char* message,
                               const char* trigger,
                               const std::string& name,
-                              Local<String> stackstr) {
+                              Local<Object> error) {
   std::string filename;
 
   // Determine the required report filename. In order of priority:
@@ -142,7 +152,7 @@ std::string TriggerNodeReport(Isolate* isolate,
     compact = per_process::cli_options->report_compact;
   }
   WriteNodeReport(isolate, env, message, trigger, filename, *outstream,
-                  stackstr, compact);
+                  error, compact);
 
   // Do not close stdout/stderr, only close files we opened.
   if (outfile.is_open()) {
@@ -161,9 +171,9 @@ void GetNodeReport(Isolate* isolate,
                    Environment* env,
                    const char* message,
                    const char* trigger,
-                   Local<String> stackstr,
+                   Local<Object> error,
                    std::ostream& out) {
-  WriteNodeReport(isolate, env, message, trigger, "", out, stackstr, false);
+  WriteNodeReport(isolate, env, message, trigger, "", out, error, false);
 }
 
 // Internal function to coordinate and write the various
@@ -174,7 +184,7 @@ static void WriteNodeReport(Isolate* isolate,
                             const char* trigger,
                             const std::string& filename,
                             std::ostream& out,
-                            Local<String> stackstr,
+                            Local<Object> error,
                             bool compact) {
   // Obtain the current time and the pid.
   TIME_TYPE tm_struct;
@@ -259,8 +269,13 @@ static void WriteNodeReport(Isolate* isolate,
   PrintVersionInformation(&writer);
   writer.json_objectend();
 
-  // Report summary JavaScript stack backtrace
-  PrintJavaScriptStack(&writer, isolate, stackstr, trigger);
+  writer.json_objectstart("javascriptStack");
+  // Report summary JavaScript error stack backtrace
+  PrintJavaScriptErrorStack(&writer, isolate, error, trigger);
+
+  // Report summary JavaScript error properties backtrace
+  PrintJavaScriptErrorProperties(&writer, isolate, error);
+  writer.json_objectend();  // the end of 'javascriptStack'
 
   // Report native stack backtrace
   PrintNativeStack(&writer);
@@ -301,7 +316,7 @@ static void WriteNodeReport(Isolate* isolate,
                       env,
                       "Worker thread subreport",
                       trigger,
-                      Local<String>(),
+                      Local<Object>(),
                       os);
 
         Mutex::ScopedLock lock(workers_mutex);
@@ -455,18 +470,56 @@ static void PrintNetworkInterfaceInfo(JSONWriter* writer) {
   }
 }
 
+static void PrintJavaScriptErrorProperties(JSONWriter* writer,
+                                           Isolate* isolate,
+                                           Local<Object> error) {
+  writer->json_objectstart("errorProperties");
+  if (!error.IsEmpty()) {
+    TryCatch try_catch(isolate);
+    Local<Context> context = error->GetIsolate()->GetCurrentContext();
+    Local<Array> keys;
+    if (!error->GetOwnPropertyNames(context).ToLocal(&keys)) {
+      return writer->json_objectend();  // the end of 'errorProperties'
+    }
+    uint32_t keys_length = keys->Length();
+    for (uint32_t i = 0; i < keys_length; i++) {
+      Local<Value> key;
+      if (!keys->Get(context, i).ToLocal(&key) || !key->IsString()) {
+        continue;
+      }
+      Local<Value> value;
+      Local<String> value_string;
+      if (!error->Get(context, key).ToLocal(&value) ||
+          !value->ToString(context).ToLocal(&value_string)) {
+        continue;
+      }
+      String::Utf8Value k(isolate, key);
+      if (!strcmp(*k, "stack") || !strcmp(*k, "message")) continue;
+      String::Utf8Value v(isolate, value_string);
+      writer->json_keyvalue(std::string(*k, k.length()),
+                            std::string(*v, v.length()));
+    }
+  }
+  writer->json_objectend();  // the end of 'errorProperties'
+}
+
 // Report the JavaScript stack.
-static void PrintJavaScriptStack(JSONWriter* writer,
+static void PrintJavaScriptErrorStack(JSONWriter* writer,
                                  Isolate* isolate,
-                                 Local<String> stackstr,
+                                 Local<Object> error,
                                  const char* trigger) {
-  writer->json_objectstart("javascriptStack");
-
-  std::string ss;
+  Local<Value> stackstr;
+  std::string ss = "";
+  TryCatch try_catch(isolate);
   if ((!strcmp(trigger, "FatalError")) ||
       (!strcmp(trigger, "Signal"))) {
     ss = "No stack.\nUnavailable.\n";
-  } else {
+  } else if (!error.IsEmpty() &&
+             error
+                 ->Get(isolate->GetCurrentContext(),
+                       node::FIXED_ONE_BYTE_STRING(isolate,
+                                                   "stack"))
+                 .ToLocal(&stackstr)) {
     String::Utf8Value sv(isolate, stackstr);
     ss = std::string(*sv, sv.length());
   }
@@ -490,7 +543,6 @@ static void PrintJavaScriptStack(JSONWriter* writer,
     }
     writer->json_arrayend();
   }
-  writer->json_objectend();
 }
 
 // Report a native stack backtrace

src/node_report.h

@@ -20,12 +20,12 @@ std::string TriggerNodeReport(v8::Isolate* isolate,
                               const char* message,
                               const char* trigger,
                               const std::string& name,
-                              v8::Local<v8::String> stackstr);
+                              v8::Local<v8::Object> error);
 void GetNodeReport(v8::Isolate* isolate,
                    node::Environment* env,
                    const char* message,
                    const char* trigger,
-                   v8::Local<v8::String> stackstr,
+                   v8::Local<v8::Object> error,
                    std::ostream& out);
 
 // Function declarations - utility functions in src/node_report_utils.cc

src/node_report_module.cc

@@ -32,18 +32,21 @@ void WriteReport(const FunctionCallbackInfo<Value>& info) {
   Isolate* isolate = env->isolate();
   HandleScope scope(isolate);
   std::string filename;
-  Local<String> stackstr;
+  Local<Object> error;
 
   CHECK_EQ(info.Length(), 4);
   String::Utf8Value message(isolate, info[0].As<String>());
   String::Utf8Value trigger(isolate, info[1].As<String>());
-  stackstr = info[3].As<String>();
 
   if (info[2]->IsString())
     filename = *String::Utf8Value(isolate, info[2]);
+  if (!info[3].IsEmpty() && info[3]->IsObject())
+    error = info[3].As<Object>();
+  else
+    error = Local<Object>();
 
   filename = TriggerNodeReport(
-      isolate, env, *message, *trigger, filename, stackstr);
+      isolate, env, *message, *trigger, filename, error);
   // Return value is the report filename
   info.GetReturnValue().Set(
       String::NewFromUtf8(isolate, filename.c_str(), v8::NewStringType::kNormal)
@@ -55,10 +58,17 @@ void GetReport(const FunctionCallbackInfo<Value>& info) {
   Environment* env = Environment::GetCurrent(info);
   Isolate* isolate = env->isolate();
   HandleScope scope(isolate);
+  Local<Object> error;
   std::ostringstream out;
 
+  CHECK_EQ(info.Length(), 1);
+  if (!info[0].IsEmpty() && info[0]->IsObject())
+    error = info[0].As<Object>();
+  else
+    error = Local<Object>();
+
   GetNodeReport(
-      isolate, env, "JavaScript API", __func__, info[0].As<String>(), out);
+      isolate, env, "JavaScript API", __func__, error, out);
 
   // Return value is the contents of a report as a string.
   info.GetReturnValue().Set(String::NewFromUtf8(isolate,

test/common/report.js

@@ -24,16 +24,16 @@ function findReports(pid, dir) {
   return results;
 }
 
-function validate(filepath) {
+function validate(filepath, fields) {
   const report = fs.readFileSync(filepath, 'utf8');
   if (process.report.compact) {
     const end = report.indexOf('\n');
     assert.strictEqual(end, report.length - 1);
   }
-  validateContent(JSON.parse(report));
+  validateContent(JSON.parse(report), fields);
 }
 
-function validateContent(report) {
+function validateContent(report, fields = []) {
   if (typeof report === 'string') {
     try {
       report = JSON.parse(report);
@@ -43,7 +43,7 @@ function validateContent(report) {
     }
   }
   try {
-    _validateContent(report);
+    _validateContent(report, fields);
   } catch (err) {
     try {
       err.stack += util.format('\n------\nFailing Report:\n%O', report);
@@ -52,7 +52,7 @@ function validateContent(report) {
   }
 }
 
-function _validateContent(report) {
+function _validateContent(report, fields = []) {
   const isWindows = process.platform === 'win32';
 
   // Verify that all sections are present as own properties of the report.
@@ -71,6 +71,26 @@ function _validateContent(report) {
     assert(typeof report[section] === 'object' && report[section] !== null);
   });
 
+  fields.forEach((field) => {
+    function checkLoop(actual, rest, expect) {
+      actual = actual[rest.shift()];
+      if (rest.length === 0 && actual !== undefined) {
+        assert.strictEqual(actual, expect);
+      } else {
+        assert(actual);
+        checkLoop(actual, rest, expect);
+      }
+    }
+    let actual, expect;
+    if (Array.isArray(field)) {
+      [actual, expect] = field;
+    } else {
+      actual = field;
+      expect = undefined;
+    }
+    checkLoop(report, actual.split('.'), expect);
+  });
+
   // Verify the format of the header section.
   const header = report.header;
   const headerFields = ['event', 'trigger', 'filename', 'dumpEventTime',
@@ -144,7 +164,10 @@ function _validateContent(report) {
   assert.strictEqual(header.host, os.hostname());
 
   // Verify the format of the javascriptStack section.
-  checkForUnknownFields(report.javascriptStack, ['message', 'stack']);
+  checkForUnknownFields(report.javascriptStack,
+                        ['message', 'stack', 'errorProperties']);
+  assert.strictEqual(typeof report.javascriptStack.errorProperties,
+                     'object');
   assert.strictEqual(typeof report.javascriptStack.message, 'string');
   if (report.javascriptStack.stack !== undefined) {
     assert(Array.isArray(report.javascriptStack.stack));
@@ -262,7 +285,7 @@ function _validateContent(report) {
 
   // Verify the format of the workers section.
   assert(Array.isArray(report.workers));
-  report.workers.forEach(_validateContent);
+  report.workers.forEach((worker) => _validateContent(worker));
 }
 
 function checkForUnknownFields(actual, expected) {

test/report/test-report-getreport.js

@@ -23,6 +23,13 @@ const helper = require('../common/report');
   assert.deepStrictEqual(helper.findReports(process.pid, process.cwd()), []);
 }
 
+{
+  const error = new Error();
+  error.foo = 'goo';
+  helper.validateContent(process.report.getReport(error),
+                         [['javascriptStack.errorProperties.foo', 'goo']]);
+}
+
 // Test with an invalid error argument.
 [null, 1, Symbol(), function() {}, 'foo'].forEach((error) => {
   assert.throws(() => {

test/report/test-report-writereport.js

@@ -15,7 +15,7 @@ process.report.directory = tmpdir.path;
 function validate() {
   const reports = helper.findReports(process.pid, tmpdir.path);
   assert.strictEqual(reports.length, 1);
-  helper.validate(reports[0]);
+  helper.validate(reports[0], arguments[0]);
   fs.unlinkSync(reports[0]);
   return reports[0];
 }
@@ -40,6 +40,13 @@ function validate() {
   validate();
 }
 
+{
+  const error = new Error();
+  error.foo = 'goo';
+  process.report.writeReport(error);
+  validate([['javascriptStack.errorProperties.foo', 'goo']]);
+}
+
 {
   // Test with a file argument.
   const file = process.report.writeReport('custom-name-1.json');