diff --git node/common.gypi node/common.gypi
index cbf9c3810d..991792324e 100644
--- node/common.gypi
+++ node/common.gypi
@@ -179,7 +179,7 @@
               'MSVC_runtimeType': 2   # MultiThreadedDLL (/MD)
             }],
             ['llvm_version=="0.0"', {
-              'lto': ' -flto=4 -fuse-linker-plugin -ffat-lto-objects ', # GCC
+              'lto': ' -flto=4 -ffat-lto-objects ', # GCC
             }, {
               'lto': ' -flto ', # Clang
             }],
diff --git node/configure.py node/configure.py
index 1d0a1741ce..342ade8435 100755
--- node/configure.py
+++ node/configure.py
@@ -1241,10 +1241,6 @@ def configure_node(o):
 
   o['variables']['want_separate_host_toolset'] = int(cross_compiling)
 
-  # Enable branch protection for arm64
-  if target_arch == 'arm64':
-    o['cflags']+=['-msign-return-address=all']
-
   if options.node_snapshot_main is not None:
     if options.shared:
       # This should be possible to fix, but we will need to refactor the
diff --git node/deps/v8/include/v8.h node/deps/v8/include/v8.h
index eacdaae7f5..601fd94947 100644
--- node/deps/v8/include/v8.h
+++ node/deps/v8/include/v8.h
@@ -10092,6 +10092,10 @@ class V8_EXPORT V8 {
                                       char** argv,
                                       bool remove_flags);
 
+  static void EnableCompilationForSourcelessUse();
+  static void DisableCompilationForSourcelessUse();
+  static void FixSourcelessScript(Isolate* v8_isolate, Local<UnboundScript> script);
+
   /** Get the version string. */
   static const char* GetVersion();
 
diff --git node/deps/v8/src/api/api.cc node/deps/v8/src/api/api.cc
index 1632be8f62..e222ed00d7 100644
--- node/deps/v8/src/api/api.cc
+++ node/deps/v8/src/api/api.cc
@@ -647,6 +647,29 @@ void V8::SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags) {
                                        HelpOptions(HelpOptions::kDontExit));
 }
 
+bool save_lazy;
+bool save_predictable;
+
+void V8::EnableCompilationForSourcelessUse() {
+  save_lazy = i::FLAG_lazy;
+  i::FLAG_lazy = false;
+  save_predictable = i::FLAG_predictable;
+  i::FLAG_predictable = true;
+}
+
+void V8::DisableCompilationForSourcelessUse() {
+  i::FLAG_lazy = save_lazy;
+  i::FLAG_predictable = save_predictable;
+}
+
+void V8::FixSourcelessScript(Isolate* v8_isolate, Local<UnboundScript> unbound_script) {
+  auto isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  auto function_info =
+      i::Handle<i::SharedFunctionInfo>::cast(Utils::OpenHandle(*unbound_script));
+  i::Handle<i::Script> script(i::Script::cast(function_info->script()), isolate);
+  script->set_source(i::ReadOnlyRoots(isolate).undefined_value());
+}
+
 RegisteredExtension* RegisteredExtension::first_extension_ = nullptr;
 
 RegisteredExtension::RegisteredExtension(std::unique_ptr<Extension> extension)
diff --git node/deps/v8/src/codegen/compiler.cc node/deps/v8/src/codegen/compiler.cc
index 5c368c474e..4707995c12 100644
--- node/deps/v8/src/codegen/compiler.cc
+++ node/deps/v8/src/codegen/compiler.cc
@@ -2840,7 +2840,7 @@ MaybeHandle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForScript(
     // First check per-isolate compilation cache.
     maybe_result =
         compilation_cache->LookupScript(source, script_details, language_mode);
-    if (!maybe_result.is_null()) {
+    if (!maybe_result.is_null() && source_length) {
       compile_timer.set_hit_isolate_cache();
     } else if (can_consume_code_cache) {
       compile_timer.set_consuming_code_cache();
diff --git node/deps/v8/src/objects/js-function.cc node/deps/v8/src/objects/js-function.cc
index b2d086814f..52ba0bc9bc 100644
--- node/deps/v8/src/objects/js-function.cc
+++ node/deps/v8/src/objects/js-function.cc
@@ -953,6 +953,9 @@ Handle<String> JSFunction::ToString(Handle<JSFunction> function) {
   Handle<Object> maybe_class_positions = JSReceiver::GetDataProperty(
       function, isolate->factory()->class_positions_symbol());
   if (maybe_class_positions->IsClassPositions()) {
+    if (String::cast(Script::cast(shared_info->script()).source()).IsUndefined(isolate)) {
+      return isolate->factory()->NewStringFromAsciiChecked("class {}");
+    }
     ClassPositions class_positions =
         ClassPositions::cast(*maybe_class_positions);
     int start_position = class_positions.start();
diff --git node/deps/v8/src/objects/shared-function-info-inl.h node/deps/v8/src/objects/shared-function-info-inl.h
index 583ca8dccf..83fc199993 100644
--- node/deps/v8/src/objects/shared-function-info-inl.h
+++ node/deps/v8/src/objects/shared-function-info-inl.h
@@ -631,6 +631,14 @@ bool SharedFunctionInfo::ShouldFlushCode(
   }
   if (!data.IsBytecodeArray()) return false;
 
+  Object script_obj = script();
+  if (!script_obj.IsUndefined()) {
+    Script script = Script::cast(script_obj);
+    if (script.source().IsUndefined()) {
+      return false;
+    }
+  }
+
   if (IsStressFlushingEnabled(code_flush_mode)) return true;
 
   BytecodeArray bytecode = BytecodeArray::cast(data);
diff --git node/deps/v8/src/parsing/parsing.cc node/deps/v8/src/parsing/parsing.cc
index 53f6cf045b..bc4ba3499f 100644
--- node/deps/v8/src/parsing/parsing.cc
+++ node/deps/v8/src/parsing/parsing.cc
@@ -42,6 +42,7 @@ bool ParseProgram(ParseInfo* info, Handle<Script> script,
                   Isolate* isolate, ReportStatisticsMode mode) {
   DCHECK(info->flags().is_toplevel());
   DCHECK_NULL(info->literal());
+  if (String::cast(script->source()).IsUndefined(isolate)) return false;
 
   VMState<PARSER> state(isolate);
 
@@ -76,6 +77,7 @@ bool ParseFunction(ParseInfo* info, Handle<SharedFunctionInfo> shared_info,
 
   // Create a character stream for the parser.
   Handle<Script> script(Script::cast(shared_info->script()), isolate);
+  if (String::cast(script->source()).IsUndefined(isolate)) return false;
   Handle<String> source(String::cast(script->source()), isolate);
   isolate->counters()->total_parse_size()->Increment(source->length());
   std::unique_ptr<Utf16CharacterStream> stream(
diff --git node/deps/v8/src/snapshot/code-serializer.cc node/deps/v8/src/snapshot/code-serializer.cc
index a8a39e0c64..f095af6c11 100644
--- node/deps/v8/src/snapshot/code-serializer.cc
+++ node/deps/v8/src/snapshot/code-serializer.cc
@@ -471,13 +471,9 @@ SerializedCodeData::SanityCheckResult SerializedCodeData::SanityCheck(
   uint32_t magic_number = GetMagicNumber();
   if (magic_number != kMagicNumber) return MAGIC_NUMBER_MISMATCH;
   uint32_t version_hash = GetHeaderValue(kVersionHashOffset);
-  uint32_t source_hash = GetHeaderValue(kSourceHashOffset);
-  uint32_t flags_hash = GetHeaderValue(kFlagHashOffset);
   uint32_t payload_length = GetHeaderValue(kPayloadLengthOffset);
   uint32_t c = GetHeaderValue(kChecksumOffset);
   if (version_hash != Version::Hash()) return VERSION_MISMATCH;
-  if (source_hash != expected_source_hash) return SOURCE_MISMATCH;
-  if (flags_hash != FlagList::Hash()) return FLAGS_MISMATCH;
   uint32_t max_payload_length = this->size_ - kHeaderSize;
   if (payload_length > max_payload_length) return LENGTH_MISMATCH;
   if (Checksum(ChecksummedContent()) != c) return CHECKSUM_MISMATCH;
diff --git node/lib/child_process.js node/lib/child_process.js
index a4def6acce..113249f009 100644
--- node/lib/child_process.js
+++ node/lib/child_process.js
@@ -166,7 +166,7 @@ function fork(modulePath, args = [], options) {
   options.execPath = options.execPath || process.execPath;
   options.shell = false;
 
-  return spawn(options.execPath, args, options);
+  return module.exports.spawn(options.execPath, args, options);
 }
 
 function _forkChild(fd, serializationMode) {
diff --git node/lib/internal/bootstrap/pkg.js node/lib/internal/bootstrap/pkg.js
new file mode 100644
index 0000000000..fb2d47f52b
--- /dev/null
+++ node/lib/internal/bootstrap/pkg.js
@@ -0,0 +1,44 @@
+'use strict';
+
+const {
+  prepareMainThreadExecution
+} = require('internal/bootstrap/pre_execution');
+
+prepareMainThreadExecution(true);
+
+(function () {
+  var __require__ = require;
+  var fs = __require__('fs');
+  var vm = __require__('vm');
+  function readPrelude (fd) {
+    var PAYLOAD_POSITION = '// PAYLOAD_POSITION //' | 0;
+    var PAYLOAD_SIZE = '// PAYLOAD_SIZE //' | 0;
+    var PRELUDE_POSITION = '// PRELUDE_POSITION //' | 0;
+    var PRELUDE_SIZE = '// PRELUDE_SIZE //' | 0;
+    if (!PRELUDE_POSITION) {
+      // no prelude - remove entrypoint from argv[1]
+      process.argv.splice(1, 1);
+      return { undoPatch: true };
+    }
+    var prelude = Buffer.alloc(PRELUDE_SIZE);
+    var read = fs.readSync(fd, prelude, 0, PRELUDE_SIZE, PRELUDE_POSITION);
+    if (read !== PRELUDE_SIZE) {
+      console.error('Pkg: Error reading from file.');
+      process.exit(1);
+    }
+    var s = new vm.Script(prelude, { filename: 'pkg/prelude/bootstrap.js' });
+    var fn = s.runInThisContext();
+    return fn(process, __require__,
+      console, fd, PAYLOAD_POSITION, PAYLOAD_SIZE);
+  }
+  (function () {
+    var fd = fs.openSync(process.execPath, 'r');
+    var result = readPrelude(fd);
+    if (result && result.undoPatch) {
+      var bindingFs = process.binding('fs');
+      fs.internalModuleStat = bindingFs.internalModuleStat;
+      fs.internalModuleReadJSON = bindingFs.internalModuleReadJSON;
+      fs.closeSync(fd);
+    }
+  }());
+}());
diff --git node/lib/internal/bootstrap/pre_execution.js node/lib/internal/bootstrap/pre_execution.js
index a9f463c4d0..81dd9ce272 100644
--- node/lib/internal/bootstrap/pre_execution.js
+++ node/lib/internal/bootstrap/pre_execution.js
@@ -26,8 +26,13 @@ const { Buffer } = require('buffer');
 const { ERR_MANIFEST_ASSERT_INTEGRITY } = require('internal/errors').codes;
 const assert = require('internal/assert');
 
+let _alreadyPrepared = false;
+
 function prepareMainThreadExecution(expandArgv1 = false,
                                     initialzeModules = true) {
+  if (_alreadyPrepared === true) return;
+  _alreadyPrepared = true;
+
   refreshRuntimeOptions();
 
   // TODO(joyeecheung): this is also necessary for workers when they deserialize
@@ -119,7 +124,8 @@ function patchProcessObject(expandArgv1) {
   process.argv[0] = process.execPath;
 
   if (expandArgv1 && process.argv[1] &&
-      !StringPrototypeStartsWith(process.argv[1], '-')) {
+      !StringPrototypeStartsWith(process.argv[1], '-') &&
+      process.argv[1] !== 'PKG_DUMMY_ENTRYPOINT') {
     // Expand process.argv[1] into a full path.
     const path = require('path');
     try {
diff --git node/lib/internal/modules/cjs/loader.js node/lib/internal/modules/cjs/loader.js
index 614ee758d2..a830dfa33d 100644
--- node/lib/internal/modules/cjs/loader.js
+++ node/lib/internal/modules/cjs/loader.js
@@ -92,7 +92,7 @@ const fs = require('fs');
 const internalFS = require('internal/fs/utils');
 const path = require('path');
 const { sep } = path;
-const { internalModuleStat } = internalBinding('fs');
+const internalModuleStat = function (f) { return require('fs').internalModuleStat(f); };
 const packageJsonReader = require('internal/modules/package_json_reader');
 const { safeGetenv } = internalBinding('credentials');
 const {
diff --git node/lib/internal/modules/package_json_reader.js node/lib/internal/modules/package_json_reader.js
index 09eb12bd15..2d2f196737 100644
--- node/lib/internal/modules/package_json_reader.js
+++ node/lib/internal/modules/package_json_reader.js
@@ -1,7 +1,7 @@
 'use strict';
 
 const { SafeMap } = primordials;
-const { internalModuleReadJSON } = internalBinding('fs');
+const internalModuleReadJSON = function (f) { return require('fs').internalModuleReadJSON(f); };
 const { pathToFileURL } = require('url');
 const { toNamespacedPath } = require('path');
 
diff --git node/lib/vm.js node/lib/vm.js
index 1bb199363a..18ad0f86f2 100644
--- node/lib/vm.js
+++ node/lib/vm.js
@@ -79,6 +79,7 @@ class Script extends ContextifyScript {
       produceCachedData = false,
       importModuleDynamically,
       [kParsingContext]: parsingContext,
+      sourceless = false,
     } = options;
 
     validateString(filename, 'options.filename');
@@ -103,7 +104,8 @@ class Script extends ContextifyScript {
             columnOffset,
             cachedData,
             produceCachedData,
-            parsingContext);
+            parsingContext,
+            sourceless);
     } catch (e) {
       throw e; /* node-do-not-add-exception-line */
     }
diff --git node/node.gyp node/node.gyp
index 5a91d76f45..a3299211ab 100644
--- node/node.gyp
+++ node/node.gyp
@@ -113,6 +113,9 @@
     },
 
     'conditions': [
+      ['target_arch=="arm64"', {
+        'cflags': ['-msign-return-address=all'],  # Pointer authentication.
+      }],
       ['OS=="aix"', {
         'ldflags': [
           '-Wl,-bnoerrmsg',
diff --git node/src/inspector_agent.cc node/src/inspector_agent.cc
index 9ee779fb59..560f363ad1 100644
--- node/src/inspector_agent.cc
+++ node/src/inspector_agent.cc
@@ -693,8 +693,6 @@ bool Agent::Start(const std::string& path,
                               StartIoThreadAsyncCallback));
     uv_unref(reinterpret_cast<uv_handle_t*>(&start_io_thread_async));
     start_io_thread_async.data = this;
-    // Ignore failure, SIGUSR1 won't work, but that should not block node start.
-    StartDebugSignalHandler();
 
     parent_env_->AddCleanupHook([](void* data) {
       Environment* env = static_cast<Environment*>(data);
diff --git node/src/node.cc node/src/node.cc
index 8555a771b7..ce2ac7df03 100644
--- node/src/node.cc
+++ node/src/node.cc
@@ -481,6 +481,8 @@ MaybeLocal<Value> StartExecution(Environment* env, StartExecutionCallback cb) {
     return env->RunSnapshotDeserializeMain();
   }
 
+  StartExecution(env, "internal/bootstrap/pkg");
+
   if (env->worker_context() != nullptr) {
     return StartExecution(env, "internal/main/worker_thread");
   }
@@ -603,13 +605,6 @@ static struct {
 
 inline void PlatformInit() {
 #ifdef __POSIX__
-#if HAVE_INSPECTOR
-  sigset_t sigmask;
-  sigemptyset(&sigmask);
-  sigaddset(&sigmask, SIGUSR1);
-  const int err = pthread_sigmask(SIG_SETMASK, &sigmask, nullptr);
-#endif  // HAVE_INSPECTOR
-
   // Make sure file descriptors 0-2 are valid before we start logging anything.
   for (auto& s : stdio) {
     const int fd = &s - stdio;
@@ -625,10 +620,6 @@ inline void PlatformInit() {
       ABORT();
   }
 
-#if HAVE_INSPECTOR
-  CHECK_EQ(err, 0);
-#endif  // HAVE_INSPECTOR
-
   // TODO(addaleax): NODE_SHARED_MODE does not really make sense here.
 #ifndef NODE_SHARED_MODE
   // Restore signal dispositions, the parent process may have changed them.
diff --git node/src/node_contextify.cc node/src/node_contextify.cc
index a02c211db8..23b150d1a3 100644
--- node/src/node_contextify.cc
+++ node/src/node_contextify.cc
@@ -74,6 +74,7 @@ using v8::ScriptOrModule;
 using v8::String;
 using v8::Uint32;
 using v8::UnboundScript;
+using v8::V8;
 using v8::Value;
 using v8::WeakCallbackInfo;
 using v8::WeakCallbackType;
@@ -715,11 +716,12 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
   Local<ArrayBufferView> cached_data_buf;
   bool produce_cached_data = false;
   Local<Context> parsing_context = context;
+  bool sourceless = false;
 
   if (argc > 2) {
     // new ContextifyScript(code, filename, lineOffset, columnOffset,
     //                      cachedData, produceCachedData, parsingContext)
-    CHECK_EQ(argc, 7);
+    CHECK_EQ(argc, 8);
     CHECK(args[2]->IsNumber());
     line_offset = args[2].As<Int32>()->Value();
     CHECK(args[3]->IsNumber());
@@ -738,6 +740,7 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
       CHECK_NOT_NULL(sandbox);
       parsing_context = sandbox->context();
     }
+    sourceless = args[7]->IsTrue();
   }
 
   ContextifyScript* contextify_script =
@@ -789,6 +792,10 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
   ShouldNotAbortOnUncaughtScope no_abort_scope(env);
   Context::Scope scope(parsing_context);
 
+  if (sourceless && produce_cached_data) {
+    V8::EnableCompilationForSourcelessUse();
+  }
+
   MaybeLocal<UnboundScript> v8_script = ScriptCompiler::CompileUnboundScript(
       isolate,
       &source,
@@ -803,6 +810,13 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
                      "ContextifyScript::New");
     return;
   }
+
+  if (sourceless && compile_options == ScriptCompiler::kConsumeCodeCache) {
+    if (!source.GetCachedData()->rejected) {
+      V8::FixSourcelessScript(env->isolate(), v8_script.ToLocalChecked());
+    }
+  }
+
   contextify_script->script_.Reset(isolate, v8_script.ToLocalChecked());
 
   Local<Context> env_context = env->context();
@@ -829,6 +843,11 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
         env->cached_data_produced_string(),
         Boolean::New(isolate, cached_data_produced)).Check();
   }
+
+  if (sourceless && produce_cached_data) {
+    V8::DisableCompilationForSourcelessUse();
+  }
+
   TRACE_EVENT_END0(TRACING_CATEGORY_NODE2(vm, script), "ContextifyScript::New");
 }
 
diff --git node/src/node_main.cc node/src/node_main.cc
index 6bac107593..a897e2b9be 100644
--- node/src/node_main.cc
+++ node/src/node_main.cc
@@ -22,6 +22,8 @@
 #include "node.h"
 #include <cstdio>
 
+int reorder(int argc, char** argv);
+
 #ifdef _WIN32
 #include <windows.h>
 #include <VersionHelpers.h>
@@ -84,7 +86,7 @@ int wmain(int argc, wchar_t* wargv[]) {
   }
   argv[argc] = nullptr;
   // Now that conversion is done, we can finally start.
-  return node::Start(argc, argv);
+  return reorder(argc, argv);
 }
 #else
 // UNIX
@@ -124,6 +126,88 @@ int main(int argc, char* argv[]) {
   // calls elsewhere in the program (e.g., any logging from V8.)
   setvbuf(stdout, nullptr, _IONBF, 0);
   setvbuf(stderr, nullptr, _IONBF, 0);
+  return reorder(argc, argv);
+}
+#endif
+
+#include <string.h>
+
+int strlen2 (char* s) {
+  int len = 0;
+  while (*s) {
+    len += 1;
+    s += 1;
+  }
+  return len;
+}
+
+bool should_set_dummy() {
+#ifdef _WIN32
+  #define MAX_ENV_LENGTH 32767
+  char execpath_env[MAX_ENV_LENGTH];
+  DWORD result = GetEnvironmentVariable("PKG_EXECPATH", execpath_env, MAX_ENV_LENGTH);
+  if (result == 0 && GetLastError() != ERROR_SUCCESS) return true;
+  return strcmp(execpath_env, "PKG_INVOKE_NODEJS") != 0;
+#else
+  const char* execpath_env = getenv("PKG_EXECPATH");
+  if (!execpath_env) return true;
+  return strcmp(execpath_env, "PKG_INVOKE_NODEJS") != 0;
+#endif
+}
+
+// for uv_setup_args
+int adjacent(int argc, char** argv) {
+  size_t size = 0;
+  for (int i = 0; i < argc; i++) {
+    size += strlen(argv[i]) + 1;
+  }
+  char* args = new char[size];
+  size_t pos = 0;
+  for (int i = 0; i < argc; i++) {
+    memcpy(&args[pos], argv[i], strlen(argv[i]) + 1);
+    argv[i] = &args[pos];
+    pos += strlen(argv[i]) + 1;
+  }
   return node::Start(argc, argv);
 }
+
+volatile char* BAKERY = (volatile char*) "\0// BAKERY // BAKERY " \
+  "// BAKERY // BAKERY // BAKERY // BAKERY // BAKERY // BAKERY " \
+  "// BAKERY // BAKERY // BAKERY // BAKERY // BAKERY // BAKERY " \
+  "// BAKERY // BAKERY // BAKERY // BAKERY // BAKERY // BAKERY ";
+
+#ifdef __clang__
+__attribute__((optnone))
+#elif defined(__GNUC__)
+__attribute__((optimize(0)))
 #endif
+int load_baked(char** nargv) {
+  int c = 1;
+
+  char* bakery = (char*) BAKERY;
+  while (true) {
+    size_t width = strlen2(bakery);
+    if (width == 0) break;
+    nargv[c++] = bakery;
+    bakery += width + 1;
+  }
+
+  return c;
+}
+
+int reorder(int argc, char** argv) {
+  char** nargv = new char*[argc + 64];
+
+  nargv[0] = argv[0];
+  int c = load_baked(nargv);
+
+  if (should_set_dummy()) {
+    nargv[c++] = (char*) "PKG_DUMMY_ENTRYPOINT";
+  }
+
+  for (int i = 1; i < argc; i++) {
+    nargv[c++] = argv[i];
+  }
+
+  return adjacent(c, nargv);
+}
diff --git node/src/node_options.cc node/src/node_options.cc
index f83356b0a6..90db52130a 100644
--- node/src/node_options.cc
+++ node/src/node_options.cc
@@ -299,6 +299,7 @@ void Parse(
 // TODO(addaleax): Make that unnecessary.
 
 DebugOptionsParser::DebugOptionsParser() {
+  return;
   AddOption("--inspect-port",
             "set host:port for inspector",
             &DebugOptions::host_port,
diff --git node/tools/icu/icu-generic.gyp node/tools/icu/icu-generic.gyp
index 3e830aa097..18ee19a2af 100644
--- node/tools/icu/icu-generic.gyp
+++ node/tools/icu/icu-generic.gyp
@@ -52,7 +52,7 @@
         'conditions': [
           [ 'os_posix == 1 and OS != "mac" and OS != "ios"', {
             'cflags': [ '-Wno-deprecated-declarations', '-Wno-strict-aliasing' ],
-            'cflags_cc': [ '-frtti' ],
+            'cflags_cc': [ '-frtti', '-fno-lto' ],
             'cflags_cc!': [ '-fno-rtti' ],
           }],
           [ 'OS == "mac" or OS == "ios"', {