feat: scripts & listScripts(true)

Author: Jan Krems

lib/node-inspect.js

@@ -31,6 +31,8 @@ const path = require('path');
 const util = require('util');
 const vm = require('vm');
 
+const natives = process.binding('natives');
+
 const debuglog = util.debuglog('inspect');
 
 const kOpCodeContinuation = 0x0;
@@ -474,7 +476,7 @@ function createCommandContext(inspector) {
   let currentFrame = undefined;
   let currentBacktrace = undefined;
 
-  const scripts = {};
+  const knownScripts = {};
   const watchedExpressions = [];
   const knownBreakpoints = [];
   const history = { debug: [], control: [] };
@@ -580,6 +582,21 @@ function createCommandContext(inspector) {
       print(helpMessage);
     },
 
+    listScripts(displayNatives = false) {
+      for (const scriptId of Object.keys(knownScripts)) {
+        const { isNative, url } = knownScripts[scriptId];
+        const isCurrent = currentSourceLocation && currentSourceLocation.scriptId === scriptId;
+        if (displayNatives || !isNative || isCurrent) {
+          const name = getRelativePath(url);
+          print(`${isCurrent ? '*' : ' '} ${scriptId}: ${name}${isNative ? ' <native>' : ''}`);
+        }
+      }
+    },
+
+    get scripts() {
+      return ctx.listScripts();
+    },
+
     debugEval(code) {
       // Repl asked for scope variables
       if (code === '.scope') {
@@ -692,11 +709,11 @@ function createCommandContext(inspector) {
       // setBreakpoint('scriptname')
       let scriptId = null;
       let ambiguous = false;
-      if (scripts[script]) {
+      if (knownScripts[script]) {
         scriptId = script;
       } else {
-        for (const id of Object.keys(scripts)) {
-          if (scripts[id] && scripts[id].url && scripts[id].url.indexOf(script) !== -1) {
+        for (const id of Object.keys(knownScripts)) {
+          if (knownScripts[id].url && knownScripts[id].url.indexOf(script) !== -1) {
             if (scriptId !== null) {
               ambiguous = true;
             }
@@ -741,7 +758,7 @@ function createCommandContext(inspector) {
     get breakpoints() {
       function formatLocation(location) {
         if (!location) return '<unknown location>';
-        const script = scripts[location.scriptId];
+        const script = knownScripts[location.scriptId];
         const scriptUrl = script ? script.url : location.scriptUrl;
         return `${getRelativePath(scriptUrl)}:${location.lineNumber}`;
       }
@@ -773,7 +790,7 @@ function createCommandContext(inspector) {
     get backtrace() {
       currentBacktrace.forEach((callFrame, idx) => {
         const { location: { scriptId, lineNumber, columnNumber }, functionName } = callFrame;
-        const script = scripts[scriptId];
+        const script = knownScripts[scriptId];
         const relativeUrl = (script && getRelativePath(script && script.url)) || '<unknown>';
         const name = functionName || '(anonymous)';
         print(`#${idx} ${name} ${relativeUrl}:${lineNumber + 1}:${columnNumber}`);
@@ -875,7 +892,7 @@ function createCommandContext(inspector) {
     const { scriptId, lineNumber } = currentSourceLocation = topFrame.location;
     currentFrame = topFrame.callFrameId;
 
-    const script = scripts[scriptId];
+    const script = knownScripts[scriptId];
     const scriptUrl = script ? getRelativePath(script.url) : '[unknown]';
     print(`${reason} in ${scriptUrl}:${lineNumber + 1}`);
 
@@ -887,9 +904,11 @@ function createCommandContext(inspector) {
 
   Debugger.on('breakpointResolved', handleBreakpointResolved);
 
-  Debugger.on('scriptParsed', ({ scriptId, url }) => {
+  Debugger.on('scriptParsed', script => {
+    const { scriptId, url } = script;
     if (url) {
-      scripts[scriptId] = { url };
+      script.isNative = url.replace('.js', '') in natives || url === 'bootstrap_node.js';
+      knownScripts[scriptId] = script;
     }
   });