report: add --report-exclude-network option

New option `--report-exclude-network`, also available as
`report.excludeNetwork`, enables the user to exclude
networking interfaces in their diagnostic report.
On some systems, this can cause the report to take minutes
to generate so this option can be used to optimize that.

Fixes: nodejs#46060

PR-URL: nodejs#51645

Co-authored-by: Joyee Cheung <joyeec9h3@gmail.com>

doc/api/cli.md

@@ -1749,6 +1749,15 @@ Enables report to be generated when the process exits due to an uncaught
 exception. Useful when inspecting the JavaScript stack in conjunction with
 native stack and other runtime environment data.
 
+### `--report-exclude-network`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+Exclude `header.networkInterfaces` from the diagnostic report. By default
+this is not set and the network interfaces are included.
+
 ### `-r`, `--require module`
 
 <!-- YAML
@@ -2553,6 +2562,7 @@ Node.js options that are allowed are:
 * `--redirect-warnings`
 * `--report-compact`
 * `--report-dir`, `--report-directory`
+* `--report-exclude-network`
 * `--report-filename`
 * `--report-on-fatalerror`
 * `--report-on-signal`

doc/api/report.md

@@ -8,6 +8,13 @@
 
 <!-- name=report -->
 
+<!-- YAML
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/51645
+    description: Added `--report-exclude-network` option for excluding networking operations that can slow down report generation in some cases.
+-->
+
 Delivers a JSON-formatted diagnostic summary, written to a file.
 
 The report is intended for development, test, and production use, to capture
@@ -452,6 +459,9 @@ meaning of `SIGUSR2` for the said purposes.
 * `--report-signal` Sets or resets the signal for report generation
   (not supported on Windows). Default signal is `SIGUSR2`.
 
+* `--report-exclude-network` Exclude `header.networkInterfaces` from the
+  diagnostic report. By default this is not set and the network interfaces are included.
+
 A report can also be triggered via an API call from a JavaScript application:
 
 ```js
@@ -571,6 +581,8 @@ timestamp, PID, and sequence number.
 written. URLs are not supported. Defaults to the current working directory of
 the Node.js process.
 
+`excludeNetwork` excludes `header.networkInterfaces` from the diagnostic report.
+
 ```js
 // Trigger report only on uncaught exceptions.
 process.report.reportOnFatalError = false;
@@ -587,6 +599,9 @@ process.report.reportOnFatalError = false;
 process.report.reportOnUncaughtException = false;
 process.report.reportOnSignal = true;
 process.report.signal = 'SIGQUIT';
+
+// Disable network interfaces reporting
+process.report.excludeNetwork = true;
 ```
 
 Configuration on module initialization is also available via

lib/internal/process/report.js

@@ -60,6 +60,13 @@ const report = {
     validateBoolean(b, 'compact');
     nr.setCompact(b);
   },
+  get excludeNetwork() {
+    return nr.getExcludeNetwork();
+  },
+  set excludeNetwork(b) {
+    validateBoolean(b, 'excludeNetwork');
+    nr.setExcludeNetwork(b);
+  },
   get signal() {
     return nr.getSignal();
   },

src/node_options.cc

@@ -785,6 +785,12 @@ EnvironmentOptionsParser::EnvironmentOptionsParser() {
             "set default TLS maximum to TLSv1.3 (default: TLSv1.3)",
             &EnvironmentOptions::tls_max_v1_3,
             kAllowedInEnvvar);
+
+  AddOption("--report-exclude-network",
+            "exclude network interface diagnostics."
+            " (default: false)",
+            &EnvironmentOptions::report_exclude_network,
+            kAllowedInEnvvar);
 }
 
 PerIsolateOptionsParser::PerIsolateOptionsParser(

src/node_options.h

@@ -218,6 +218,8 @@ class EnvironmentOptions : public Options {
 
   std::vector<std::string> user_argv;
 
+  bool report_exclude_network = false;
+
   inline DebugOptions* get_debug_options() { return &debug_options_; }
   inline const DebugOptions& debug_options() const { return debug_options_; }
 

src/node_report.cc

@@ -61,8 +61,10 @@ static void WriteNodeReport(Isolate* isolate,
                             const std::string& filename,
                             std::ostream& out,
                             Local<Value> error,
-                            bool compact);
-static void PrintVersionInformation(JSONWriter* writer);
+                            bool compact,
+                            bool exclude_network = false);
+static void PrintVersionInformation(JSONWriter* writer,
+                                    bool exclude_network = false);
 static void PrintJavaScriptErrorStack(JSONWriter* writer,
                                       Isolate* isolate,
                                       Local<Value> error,
@@ -93,7 +95,8 @@ static void WriteNodeReport(Isolate* isolate,
                             const std::string& filename,
                             std::ostream& out,
                             Local<Value> error,
-                            bool compact) {
+                            bool compact,
+                            bool exclude_network) {
   // Obtain the current time and the pid.
   TIME_TYPE tm_struct;
   DiagnosticFilename::LocalTime(&tm_struct);
@@ -174,7 +177,7 @@ static void WriteNodeReport(Isolate* isolate,
   }
 
   // Report Node.js and OS version information
-  PrintVersionInformation(&writer);
+  PrintVersionInformation(&writer, exclude_network);
   writer.json_objectend();
 
   if (isolate != nullptr) {
@@ -256,7 +259,7 @@ static void WriteNodeReport(Isolate* isolate,
 }
 
 // Report Node.js version, OS version and machine information.
-static void PrintVersionInformation(JSONWriter* writer) {
+static void PrintVersionInformation(JSONWriter* writer, bool exclude_network) {
   std::ostringstream buf;
   // Report Node version
   buf << "v" << NODE_VERSION_STRING;
@@ -300,7 +303,7 @@ static void PrintVersionInformation(JSONWriter* writer) {
   }
 
   PrintCpuInfo(writer);
-  PrintNetworkInterfaceInfo(writer);
+  if (!exclude_network) PrintNetworkInterfaceInfo(writer);
 
   char host[UV_MAXHOSTNAMESIZE];
   size_t host_size = sizeof(host);
@@ -917,8 +920,19 @@ std::string TriggerNodeReport(Isolate* isolate,
     compact = per_process::cli_options->report_compact;
   }
 
-  report::WriteNodeReport(
-      isolate, env, message, trigger, filename, *outstream, error, compact);
+  bool exclude_network = env != nullptr ? env->options()->report_exclude_network
+                                        : per_process::cli_options->per_isolate
+                                              ->per_env->report_exclude_network;
+
+  report::WriteNodeReport(isolate,
+                          env,
+                          message,
+                          trigger,
+                          filename,
+                          *outstream,
+                          error,
+                          compact,
+                          exclude_network);
 
   // Do not close stdout/stderr, only close files we opened.
   if (outfile.is_open()) {
@@ -969,8 +983,11 @@ void GetNodeReport(Isolate* isolate,
   if (isolate != nullptr) {
     env = Environment::GetCurrent(isolate);
   }
+  bool exclude_network = env != nullptr ? env->options()->report_exclude_network
+                                        : per_process::cli_options->per_isolate
+                                              ->per_env->report_exclude_network;
   report::WriteNodeReport(
-      isolate, env, message, trigger, "", out, error, false);
+      isolate, env, message, trigger, "", out, error, false, exclude_network);
 }
 
 // External function to trigger a report, writing to a supplied stream.
@@ -983,8 +1000,11 @@ void GetNodeReport(Environment* env,
   if (env != nullptr) {
     isolate = env->isolate();
   }
+  bool exclude_network = env != nullptr ? env->options()->report_exclude_network
+                                        : per_process::cli_options->per_isolate
+                                              ->per_env->report_exclude_network;
   report::WriteNodeReport(
-      isolate, env, message, trigger, "", out, error, false);
+      isolate, env, message, trigger, "", out, error, false, exclude_network);
 }
 
 }  // namespace node

src/node_report_module.cc

@@ -84,6 +84,17 @@ static void SetCompact(const FunctionCallbackInfo<Value>& info) {
   per_process::cli_options->report_compact = compact;
 }
 
+static void GetExcludeNetwork(const FunctionCallbackInfo<Value>& info) {
+  Environment* env = Environment::GetCurrent(info);
+  info.GetReturnValue().Set(env->options()->report_exclude_network);
+}
+
+static void SetExcludeNetwork(const FunctionCallbackInfo<Value>& info) {
+  Environment* env = Environment::GetCurrent(info);
+  CHECK(info[0]->IsBoolean());
+  env->options()->report_exclude_network = info[0]->IsTrue();
+}
+
 static void GetDirectory(const FunctionCallbackInfo<Value>& info) {
   Mutex::ScopedLock lock(per_process::cli_options_mutex);
   Environment* env = Environment::GetCurrent(info);
@@ -174,6 +185,8 @@ static void Initialize(Local<Object> exports,
   SetMethod(context, exports, "getReport", GetReport);
   SetMethod(context, exports, "getCompact", GetCompact);
   SetMethod(context, exports, "setCompact", SetCompact);
+  SetMethod(context, exports, "getExcludeNetwork", GetExcludeNetwork);
+  SetMethod(context, exports, "setExcludeNetwork", SetExcludeNetwork);
   SetMethod(context, exports, "getDirectory", GetDirectory);
   SetMethod(context, exports, "setDirectory", SetDirectory);
   SetMethod(context, exports, "getFilename", GetFilename);
@@ -200,6 +213,8 @@ void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(GetReport);
   registry->Register(GetCompact);
   registry->Register(SetCompact);
+  registry->Register(GetExcludeNetwork);
+  registry->Register(SetExcludeNetwork);
   registry->Register(GetDirectory);
   registry->Register(SetDirectory);
   registry->Register(GetFilename);

test/report/test-report-config.js

@@ -66,6 +66,17 @@ assert.throws(() => {
 }, { code: 'ERR_INVALID_ARG_TYPE' });
 assert.strictEqual(process.report.compact, true);
 
+// Verify that process.report.excludeNetwork behaves properly.
+assert.strictEqual(process.report.excludeNetwork, false);
+process.report.excludeNetwork = true;
+assert.strictEqual(process.report.excludeNetwork, true);
+process.report.excludeNetwork = false;
+assert.strictEqual(process.report.excludeNetwork, false);
+assert.throws(() => {
+  process.report.excludeNetwork = {};
+}, { code: 'ERR_INVALID_ARG_TYPE' });
+assert.strictEqual(process.report.excludeNetwork, false);
+
 if (!common.isWindows) {
   // Verify that process.report.signal behaves properly.
   assert.strictEqual(process.report.signal, 'SIGUSR2');

test/report/test-report-exclude-network.js

@@ -0,0 +1,41 @@
+'use strict';
+require('../common');
+const assert = require('node:assert');
+const { spawnSync } = require('node:child_process');
+const tmpdir = require('../common/tmpdir');
+const { describe, it, before } = require('node:test');
+const fs = require('node:fs');
+const helper = require('../common/report');
+
+function validate(pid) {
+  const reports = helper.findReports(pid, tmpdir.path);
+  assert.strictEqual(reports.length, 1);
+  let report = fs.readFileSync(reports[0], { encoding: 'utf8' });
+  report = JSON.parse(report);
+  assert.strictEqual(report.header.networkInterfaces, undefined);
+  fs.unlinkSync(reports[0]);
+}
+
+describe('report exclude network option', () => {
+  before(() => {
+    tmpdir.refresh();
+    process.report.directory = tmpdir.path;
+  });
+
+  it('should be configurable with --report-exclude-network', () => {
+    const args = ['--report-exclude-network', '-e', 'process.report.writeReport()'];
+    const child = spawnSync(process.execPath, args, { cwd: tmpdir.path });
+    assert.strictEqual(child.status, 0);
+    assert.strictEqual(child.signal, null);
+    validate(child.pid);
+  });
+
+  it('should be configurable with report.excludeNetwork', () => {
+    process.report.excludeNetwork = true;
+    process.report.writeReport();
+    validate(process.pid);
+
+    const report = process.report.getReport();
+    assert.strictEqual(report.header.networkInterfaces, undefined);
+  });
+});