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inspector: allow require in Runtime.evaluate
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Some parts were written by Timothy Gu <timothygu99@gmail.com>.

PR-URL: #8837
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Aleksei Koziatinskii <ak239spb@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
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@TimothyGu
Jan Krems authored and TimothyGu committed Aug 7, 2017
1 parent e96ca62 commit 5fd2f03
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Showing 4 changed files with 197 additions and 0 deletions.
17 changes: 17 additions & 0 deletions lib/internal/bootstrap_node.js
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Original file line number Diff line number Diff line change
Expand Up @@ -282,6 +282,7 @@
return console;
}
});
setupInspectorCommandLineAPI();
}

function installInspectorConsole(globalConsole) {
Expand Down Expand Up @@ -310,6 +311,22 @@
return wrappedConsole;
}

function setupInspectorCommandLineAPI() {
const { addCommandLineAPI } = process.binding('inspector');
if (!addCommandLineAPI) return;

const Module = NativeModule.require('module');
const { makeRequireFunction } = NativeModule.require('internal/module');
const path = NativeModule.require('path');
const cwd = tryGetCwd(path);

const consoleAPIModule = new Module('<inspector console>');
consoleAPIModule.paths =
Module._nodeModulePaths(cwd).concat(Module.globalPaths);

addCommandLineAPI('require', makeRequireFunction(consoleAPIModule));
}

function setupProcessFatal() {
const async_wrap = process.binding('async_wrap');
// Arrays containing hook flags and ids for async_hook calls.
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1 change: 1 addition & 0 deletions src/env.h
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,7 @@ namespace node {
V(context, v8::Context) \
V(domain_array, v8::Array) \
V(domains_stack_array, v8::Array) \
V(inspector_console_api_object, v8::Object) \
V(jsstream_constructor_template, v8::FunctionTemplate) \
V(module_load_list_array, v8::Array) \
V(pbkdf2_constructor_template, v8::ObjectTemplate) \
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37 changes: 37 additions & 0 deletions src/inspector_agent.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
namespace node {
namespace inspector {
namespace {
using v8::Array;
using v8::Context;
using v8::External;
using v8::Function;
Expand Down Expand Up @@ -554,6 +555,20 @@ class NodeInspectorClient : public V8InspectorClient {
return env_->context();
}

void installAdditionalCommandLineAPI(Local<Context> context,
Local<Object> target) override {
Local<Object> console_api = env_->inspector_console_api_object();

Local<Array> properties =
console_api->GetOwnPropertyNames(context).ToLocalChecked();
for (uint32_t i = 0; i < properties->Length(); ++i) {
Local<Value> key = properties->Get(context, i).ToLocalChecked();
target->Set(context,
key,
console_api->Get(context, key).ToLocalChecked()).FromJust();
}
}

void FatalException(Local<Value> error, Local<v8::Message> message) {
Local<Context> context = env_->context();

Expand Down Expand Up @@ -682,6 +697,20 @@ bool Agent::StartIoThread(bool wait_for_connect) {
return true;
}

static void AddCommandLineAPI(
const FunctionCallbackInfo<Value>& info) {
auto env = Environment::GetCurrent(info);
Local<Context> context = env->context();

if (info.Length() != 2 || !info[0]->IsString()) {
return env->ThrowTypeError("inspector.addCommandLineAPI takes "
"exactly 2 arguments: a string and a value.");
}

Local<Object> console_api = env->inspector_console_api_object();
console_api->Set(context, info[0], info[1]).FromJust();
}

void Agent::Stop() {
if (io_ != nullptr) {
io_->Stop();
Expand Down Expand Up @@ -784,8 +813,16 @@ void Url(const FunctionCallbackInfo<Value>& args) {
void Agent::InitInspector(Local<Object> target, Local<Value> unused,
Local<Context> context, void* priv) {
Environment* env = Environment::GetCurrent(context);
{
auto obj = Object::New(env->isolate());
auto null = Null(env->isolate());
CHECK(obj->SetPrototype(context, null).FromJust());
env->set_inspector_console_api_object(obj);
}

Agent* agent = env->inspector_agent();
env->SetMethod(target, "consoleCall", InspectorConsoleCall);
env->SetMethod(target, "addCommandLineAPI", AddCommandLineAPI);
if (agent->debug_options_.wait_for_connect())
env->SetMethod(target, "callAndPauseOnStart", CallAndPauseOnStart);
env->SetMethod(target, "connect", ConnectJSBindingsSession);
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142 changes: 142 additions & 0 deletions test/inspector/test-inspector.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,11 @@ function checkBadPath(err, response) {
assert(/WebSockets request was expected/.test(err.response));
}

function checkException(message) {
assert.strictEqual(message['exceptionDetails'], undefined,
'An exception occurred during execution');
}

function expectMainScriptSource(result) {
const expected = helper.mainScriptSource();
const source = result['scriptSource'];
Expand Down Expand Up @@ -209,6 +214,142 @@ function testI18NCharacters(session) {
]);
}

function testCommandLineAPI(session) {
const testModulePath = require.resolve('../fixtures/empty.js');
const testModuleStr = JSON.stringify(testModulePath);
const printAModulePath = require.resolve('../fixtures/printA.js');
const printAModuleStr = JSON.stringify(printAModulePath);
const printBModulePath = require.resolve('../fixtures/printB.js');
const printBModuleStr = JSON.stringify(printBModulePath);
session.sendInspectorCommands([
[ // we can use `require` outside of a callframe with require in scope
{
'method': 'Runtime.evaluate', 'params': {
'expression': 'typeof require("fs").readFile === "function"',
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.strictEqual(message['result']['value'], true);
}
],
[ // the global require has the same properties as a normal `require`
{
'method': 'Runtime.evaluate', 'params': {
'expression': [
'typeof require.resolve === "function"',
'typeof require.extensions === "object"',
'typeof require.cache === "object"'
].join(' && '),
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.strictEqual(message['result']['value'], true);
}
],
[ // `require` twice returns the same value
{
'method': 'Runtime.evaluate', 'params': {
// 1. We require the same module twice
// 2. We mutate the exports so we can compare it later on
'expression': `
Object.assign(
require(${testModuleStr}),
{ old: 'yes' }
) === require(${testModuleStr})`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.strictEqual(message['result']['value'], true);
}
],
[ // after require the module appears in require.cache
{
'method': 'Runtime.evaluate', 'params': {
'expression': `JSON.stringify(
require.cache[${testModuleStr}].exports
)`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.deepStrictEqual(JSON.parse(message['result']['value']),
{ old: 'yes' });
}
],
[ // remove module from require.cache
{
'method': 'Runtime.evaluate', 'params': {
'expression': `delete require.cache[${testModuleStr}]`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.strictEqual(message['result']['value'], true);
}
],
[ // require again, should get fresh (empty) exports
{
'method': 'Runtime.evaluate', 'params': {
'expression': `JSON.stringify(require(${testModuleStr}))`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.deepStrictEqual(JSON.parse(message['result']['value']), {});
}
],
[ // require 2nd module, exports an empty object
{
'method': 'Runtime.evaluate', 'params': {
'expression': `JSON.stringify(require(${printAModuleStr}))`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.deepStrictEqual(JSON.parse(message['result']['value']), {});
}
],
[ // both modules end up with the same module.parent
{
'method': 'Runtime.evaluate', 'params': {
'expression': `JSON.stringify({
parentsEqual:
require.cache[${testModuleStr}].parent ===
require.cache[${printAModuleStr}].parent,
parentId: require.cache[${testModuleStr}].parent.id,
})`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.deepStrictEqual(JSON.parse(message['result']['value']), {
parentsEqual: true,
parentId: '<inspector console>'
});
}
],
[ // the `require` in the module shadows the command line API's `require`
{
'method': 'Debugger.evaluateOnCallFrame', 'params': {
'callFrameId': '{"ordinal":0,"injectedScriptId":1}',
'expression': `(
require(${printBModuleStr}),
require.cache[${printBModuleStr}].parent.id
)`,
'includeCommandLineAPI': true
}
}, (message) => {
checkException(message);
assert.notStrictEqual(message['result']['value'],
'<inspector console>');
}
],
]);
}

function testWaitsForFrontendDisconnect(session, harness) {
console.log('[test]', 'Verify node waits for the frontend to disconnect');
session.sendInspectorCommands({ 'method': 'Debugger.resume' })
Expand All @@ -231,6 +372,7 @@ function runTests(harness) {
testSetBreakpointAndResume,
testInspectScope,
testI18NCharacters,
testCommandLineAPI,
testWaitsForFrontendDisconnect
]).expectShutDown(55);
}
Expand Down

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