src: make InitializeOncePerProcess more flexible

PR-URL: https://github.com/nodejs/node/pull/38888
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

2 files changed, 84 insertions, 51 deletions

diff --git a/src/node.cc b/src/node.cc
index 6c601fb920a..a9afbd2682f 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -233,7 +233,7 @@ int Environment::InitializeInspector(
 
   return 0;
 }
-#endif  // HAVE_INSPECTOR && NODE_USE_V8_PLATFORM
+#endif  // HAVE_INSPECTOR
 
 #define ATOMIC_WAIT_EVENTS(V)                                               \
   V(kStartWait,           "started")                                        \
@@ -957,12 +957,26 @@ int InitializeNodeWithArgs(std::vector<std::string>* argv,
 }
 
 InitializationResult InitializeOncePerProcess(int argc, char** argv) {
+  return InitializeOncePerProcess(argc, argv, kDefaultInitialization);
+}
+
+InitializationResult InitializeOncePerProcess(
+  int argc,
+  char** argv,
+  InitializationSettingsFlags flags) {
+  uint64_t init_flags = flags;
+  if (init_flags & kDefaultInitialization) {
+    init_flags = init_flags | kInitializeV8 | kInitOpenSSL | kRunPlatformInit;
+  }
+
   // Initialized the enabled list for Debug() calls with system
   // environment variables.
   per_process::enabled_debug_list.Parse(nullptr);
 
   atexit(ResetStdio);
-  PlatformInit();
+
+  if (init_flags & kRunPlatformInit)
+    PlatformInit();
 
   CHECK_GT(argc, 0);
 
@@ -1015,65 +1029,71 @@ InitializationResult InitializeOncePerProcess(int argc, char** argv) {
     return result;
   }
 
+  if (init_flags & kInitOpenSSL) {
 #if HAVE_OPENSSL
-  {
-    std::string extra_ca_certs;
-    if (credentials::SafeGetenv("NODE_EXTRA_CA_CERTS", &extra_ca_certs))
-      crypto::UseExtraCaCerts(extra_ca_certs);
-  }
-  // In the case of FIPS builds we should make sure
-  // the random source is properly initialized first.
-#if OPENSSL_VERSION_MAJOR >= 3
-  // Call OPENSSL_init_crypto to initialize OPENSSL_INIT_LOAD_CONFIG to
-  // avoid the default behavior where errors raised during the parsing of the
-  // OpenSSL configuration file are not propagated and cannot be detected.
-  //
-  // If FIPS is configured the OpenSSL configuration file will have an .include
-  // pointing to the fipsmodule.cnf file generated by the openssl fipsinstall
-  // command. If the path to this file is incorrect no error will be reported.
-  //
-  // For Node.js this will mean that EntropySource will be called by V8 as part
-  // of its initialization process, and EntropySource will in turn call
-  // CheckEntropy. CheckEntropy will call RAND_status which will now always
-  // return 0, leading to an endless loop and the node process will appear to
-  // hang/freeze.
-  std::string env_openssl_conf;
-  credentials::SafeGetenv("OPENSSL_CONF", &env_openssl_conf);
-
-  bool has_cli_conf = !per_process::cli_options->openssl_config.empty();
-  if (has_cli_conf || !env_openssl_conf.empty()) {
-    OPENSSL_INIT_SETTINGS* settings = OPENSSL_INIT_new();
-    OPENSSL_INIT_set_config_file_flags(settings, CONF_MFLAGS_DEFAULT_SECTION);
-    if (has_cli_conf) {
-      const char* conf = per_process::cli_options->openssl_config.c_str();
-      OPENSSL_INIT_set_config_filename(settings, conf);
+    {
+      std::string extra_ca_certs;
+      if (credentials::SafeGetenv("NODE_EXTRA_CA_CERTS", &extra_ca_certs))
+        crypto::UseExtraCaCerts(extra_ca_certs);
     }
-    OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, settings);
-    OPENSSL_INIT_free(settings);
-
-    if (ERR_peek_error() != 0) {
-      result.exit_code = ERR_GET_REASON(ERR_peek_error());
-      result.early_return = true;
-      fprintf(stderr, "OpenSSL configuration error:\n");
-      ERR_print_errors_fp(stderr);
-      return result;
+    // In the case of FIPS builds we should make sure
+    // the random source is properly initialized first.
+#if OPENSSL_VERSION_MAJOR >= 3
+    // Call OPENSSL_init_crypto to initialize OPENSSL_INIT_LOAD_CONFIG to
+    // avoid the default behavior where errors raised during the parsing of the
+    // OpenSSL configuration file are not propagated and cannot be detected.
+    //
+    // If FIPS is configured the OpenSSL configuration file will have an
+    // .include pointing to the fipsmodule.cnf file generated by the openssl
+    // fipsinstall command. If the path to this file is incorrect no error
+    // will be reported.
+    //
+    // For Node.js this will mean that EntropySource will be called by V8 as
+    // part of its initialization process, and EntropySource will in turn call
+    // CheckEntropy. CheckEntropy will call RAND_status which will now always
+    // return 0, leading to an endless loop and the node process will appear to
+    // hang/freeze.
+    std::string env_openssl_conf;
+    credentials::SafeGetenv("OPENSSL_CONF", &env_openssl_conf);
+
+    bool has_cli_conf = !per_process::cli_options->openssl_config.empty();
+    if (has_cli_conf || !env_openssl_conf.empty()) {
+      OPENSSL_INIT_SETTINGS* settings = OPENSSL_INIT_new();
+      OPENSSL_INIT_set_config_file_flags(settings, CONF_MFLAGS_DEFAULT_SECTION);
+      if (has_cli_conf) {
+        const char* conf = per_process::cli_options->openssl_config.c_str();
+        OPENSSL_INIT_set_config_filename(settings, conf);
+      }
+      OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, settings);
+      OPENSSL_INIT_free(settings);
+
+      if (ERR_peek_error() != 0) {
+        result.exit_code = ERR_GET_REASON(ERR_peek_error());
+        result.early_return = true;
+        fprintf(stderr, "OpenSSL configuration error:\n");
+        ERR_print_errors_fp(stderr);
+        return result;
+      }
     }
-  }
 #else
-  if (FIPS_mode()) {
-    OPENSSL_init();
-  }
+    if (FIPS_mode()) {
+      OPENSSL_init();
+    }
 #endif
-  // V8 on Windows doesn't have a good source of entropy. Seed it from
-  // OpenSSL's pool.
-  V8::SetEntropySource(crypto::EntropySource);
+    // V8 on Windows doesn't have a good source of entropy. Seed it from
+    // OpenSSL's pool.
+    V8::SetEntropySource(crypto::EntropySource);
 #endif  // HAVE_OPENSSL
-
+}
   per_process::v8_platform.Initialize(
       static_cast<int>(per_process::cli_options->v8_thread_pool_size));
-  V8::Initialize();
+  if (init_flags & kInitializeV8) {
+    V8::Initialize();
+  }
+
   performance::performance_v8_start = PERFORMANCE_NOW();
   per_process::v8_initialized = true;
+
   return result;
 }
 
diff --git a/src/node_internals.h b/src/node_internals.h
index b75092d662d..31076551e70 100644
--- a/src/node_internals.h
+++ b/src/node_internals.h
@@ -316,7 +316,20 @@ struct InitializationResult {
   std::vector<std::string> exec_args;
   bool early_return = false;
 };
+
+enum InitializationSettingsFlags : uint64_t {
+  kDefaultInitialization = 1 << 0,
+  kInitializeV8 = 1 << 1,
+  kRunPlatformInit = 1 << 2,
+  kInitOpenSSL = 1 << 3
+};
+
+// TODO(codebytere): eventually document and expose to embedders.
 InitializationResult InitializeOncePerProcess(int argc, char** argv);
+InitializationResult InitializeOncePerProcess(
+  int argc,
+  char** argv,
+  InitializationSettingsFlags flags);
 void TearDownOncePerProcess();
 void SetIsolateErrorHandlers(v8::Isolate* isolate, const IsolateSettings& s);
 void SetIsolateMiscHandlers(v8::Isolate* isolate, const IsolateSettings& s);