test: include strace openat test

.github/workflows/test-asan.yml

@@ -45,6 +45,7 @@ jobs:
       CXX: clang++
       LINK: clang++
       CONFIG_FLAGS: --enable-asan
+      ASAN: true
     steps:
       - uses: actions/checkout@v3
         with:

test/common/index.js

@@ -120,6 +120,7 @@ const isFreeBSD = process.platform === 'freebsd';
 const isOpenBSD = process.platform === 'openbsd';
 const isLinux = process.platform === 'linux';
 const isOSX = process.platform === 'darwin';
+const isAsan = process.env.ASAN !== undefined;
 const isPi = (() => {
   try {
     // Normal Raspberry Pi detection is to find the `Raspberry Pi` string in
@@ -900,6 +901,7 @@ const common = {
   invalidArgTypeHelper,
   isAIX,
   isAlive,
+  isAsan,
   isDumbTerminal,
   isFreeBSD,
   isLinux,

test/parallel/test-strace-openat-openssl.js

@@ -0,0 +1,61 @@
+'use strict';
+
+const common = require('../common');
+const { spawn, spawnSync } = require('node:child_process');
+const { createInterface } = require('node:readline');
+const assert = require('node:assert');
+
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+if (!common.isLinux)
+  common.skip('linux only');
+if (common.isAsan)
+  common.skip('strace does not work well with address sanitizer builds');
+if (spawnSync('strace').error !== undefined) {
+  common.skip('missing strace');
+}
+
+{
+  const allowedOpenCalls = new Set([
+    '/etc/ssl/openssl.cnf',
+  ]);
+  const strace = spawn('strace', [
+    '-f', '-ff',
+    '-e', 'trace=open,openat',
+    '-s', '512',
+    '-D', process.execPath, '-e', 'require("crypto")',
+  ]);
+
+  // stderr is the default for strace
+  const rl = createInterface({ input: strace.stderr });
+  rl.on('line', (line) => {
+    if (!line.startsWith('open')) {
+      return;
+    }
+
+    const file = line.match(/"(.*?)"/)[1];
+    // skip .so reading attempt
+    if (file.match(/.+\.so(\.?)/) !== null) {
+      return;
+    }
+    // skip /proc/*
+    if (file.match(/\/proc\/.+/) !== null) {
+      return;
+    }
+
+    assert(allowedOpenCalls.delete(file), `${file} is not in the list of allowed openat calls`);
+  });
+  const debugOutput = [];
+  strace.stderr.setEncoding('utf8');
+  strace.stderr.on('data', (chunk) => {
+    debugOutput.push(chunk.toString());
+  });
+  strace.on('error', common.mustNotCall());
+  strace.on('exit', common.mustCall((code) => {
+    assert.strictEqual(code, 0, debugOutput);
+    const missingKeys = Array.from(allowedOpenCalls.keys());
+    if (missingKeys.length) {
+      assert.fail(`The following openat call are missing: ${missingKeys.join(',')}`);
+    }
+  }));
+}