debugger: add debugger alias for exec(expr)

#41794 PR-URL: #41907 Reviewed-By: Jan Krems <jan.krems@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com>

Author: meixg

doc/api/debugger.md

@@ -197,7 +197,8 @@ debug>
 * `watchers`: List all watchers and their values (automatically listed on each
  breakpoint)
 * `repl`: Open debugger's repl for evaluation in debugging script's context
-* `exec expr`: Execute an expression in debugging script's context
+* `exec expr`, `p expr`: Execute an expression in debugging script's context and
+ print its value
 
 ### Execution control
 

lib/internal/debugger/inspect_repl.js

@@ -68,6 +68,7 @@ const SHORTCUTS = {
  setBreakpoint: 'sb',
  clearBreakpoint: 'cb',
  run: 'r',
+ exec: 'p'
 };
 
 const HELP = StringPrototypeTrim(`
@@ -93,7 +94,8 @@ watch(expr) Start watching the given expression
 unwatch(expr) Stop watching an expression
 watchers Print all watched expressions and their current values
 
-exec(expr) Evaluate the expression and print the value
+exec(expr), p(expr), exec expr, p expr
+ Evaluate the expression and print the value
 repl Enter a debug repl that works like exec
 
 scripts List application scripts that are currently loaded
@@ -530,7 +532,7 @@ function createRepl(inspector) {
  function prepareControlCode(input) {
  if (input === '\n') return lastCommand;
  // Add parentheses: exec process.title => exec("process.title");
- const match = RegExpPrototypeSymbolMatch(/^\s*exec\s+([^\n]*)/, input);
+ const match = RegExpPrototypeSymbolMatch(/^\s*(?:exec|p)\s+([^\n]*)/, input);
  if (match) {
  lastCommand = `exec(${JSONStringify(match[1])})`;
  } else {

test/sequential/test-debugger-exec.js

@@ -27,6 +27,14 @@ const assert = require('assert');
  'works w/o paren'
  );
  })
+ .then(() => cli.command('p [typeof heartbeat, typeof process.exit]'))
+ .then(() => {
+ assert.match(
+ cli.output,
+ /\[ 'function', 'function' \]/,
+ 'works w/o paren, short'
+ );
+ })
  .then(() => cli.command('repl'))
  .then(() => {
  assert.match(
@@ -54,6 +62,14 @@ const assert = require('assert');
  'works w/ paren'
  );
  })
+ .then(() => cli.command('p("[typeof heartbeat, typeof process.exit]")'))
+ .then(() => {
+ assert.match(
+ cli.output,
+ /\[ 'function', 'function' \]/,
+ 'works w/ paren, short'
+ );
+ })
  .then(() => cli.command('cont'))
  .then(() => cli.command('exec [typeof heartbeat, typeof process.exit]'))
  .then(() => {