--- node/common.gypi +++ node/common.gypi @@ -188,17 +188,28 @@ 'v8_enable_handle_zapping': 0, 'pgo_generate': ' -fprofile-generate ', 'pgo_use': ' -fprofile-use -fprofile-correction ', - 'lto': ' -flto=4 -fuse-linker-plugin -ffat-lto-objects ', 'conditions': [ ['node_shared != "true"', { 'MSVC_runtimeType': 0 # MultiThreaded (/MT) }, { 'MSVC_runtimeType': 2 # MultiThreadedDLL (/MD) }], + ['llvm_version=="0.0"', { + 'lto': ' -flto=4 -ffat-lto-objects ', # GCC + }, { + 'lto': ' -flto ', # Clang + }], ], }, 'cflags': [ '-O3' ], 'conditions': [ + ['enable_lto=="true"', { + 'cflags': ['<(lto)'], + 'ldflags': ['<(lto)'], + 'xcode_settings': { + 'LLVM_LTO': 'YES', + }, + }], ['OS=="solaris"', { # pull in V8's postmortem metadata 'ldflags': [ '-Wl,-z,allextract' ] @@ -216,10 +227,6 @@ 'cflags': ['<(pgo_use)'], 'ldflags': ['<(pgo_use)'], },], - ['enable_lto=="true"', { - 'cflags': ['<(lto)'], - 'ldflags': ['<(lto)'], - },], ], },], ['OS == "android"', { --- node/configure.py +++ node/configure.py @@ -154,7 +154,7 @@ parser.add_option("--enable-lto", action="store_true", dest="enable_lto", help="Enable compiling with lto of a binary. This feature is only available " - "on linux with gcc and g++ 5.4.1 or newer.") + "with gcc 5.4.1+ or clang 3.9.1+.") parser.add_option("--link-module", action="append", @@ -842,6 +842,7 @@ def get_gas_version(cc): # quite prepared to go that far yet. def check_compiler(o): if sys.platform == 'win32': + o['variables']['llvm_version'] = '0.0' if not options.openssl_no_asm and options.dest_cpu in ('x86', 'x64'): nasm_version = get_nasm_version('nasm') o['variables']['nasm_version'] = nasm_version @@ -1021,12 +1022,19 @@ def configure_mips(o, target_arch): host_byteorder = 'little' if target_arch in ('mipsel', 'mips64el') else 'big' o['variables']['v8_host_byteorder'] = host_byteorder +def clang_version_ge(version_checked): + for compiler in [(CC, 'c'), (CXX, 'c++')]: + ok, is_clang, clang_version, gcc_version = \ + try_check_compiler(compiler[0], compiler[1]) + if is_clang and clang_version >= version_checked: + return True + return False def gcc_version_ge(version_checked): for compiler in [(CC, 'c'), (CXX, 'c++')]: - ok, is_clang, clang_version, compiler_version = \ + ok, is_clang, clang_version, gcc_version = \ try_check_compiler(compiler[0], compiler[1]) - if is_clang or compiler_version < version_checked: + if is_clang or gcc_version < version_checked: return False return True @@ -1103,18 +1111,19 @@ def configure_node(o): o['variables']['enable_pgo_generate'] = b(options.enable_pgo_generate) o['variables']['enable_pgo_use'] = b(options.enable_pgo_use) - if flavor != 'linux' and (options.enable_lto): + if flavor == 'win' and (options.enable_lto): raise Exception( - 'The lto option is supported only on linux.') - - if flavor == 'linux': - if options.enable_lto: - version_checked = (5, 4, 1) - if not gcc_version_ge(version_checked): - version_checked_str = ".".join(map(str, version_checked)) - raise Exception( - 'The option --enable-lto is supported for gcc and gxx %s' - ' or newer only.' % (version_checked_str)) + 'Use Link Time Code Generation instead.') + + if options.enable_lto: + gcc_version_checked = (5, 4, 1) + clang_version_checked = (3, 9, 1) + if not gcc_version_ge(gcc_version_checked) and not clang_version_ge(clang_version_checked): + gcc_version_checked_str = ".".join(map(str, gcc_version_checked)) + clang_version_checked_str = ".".join(map(str, clang_version_checked)) + raise Exception( + 'The option --enable-lto is supported for gcc %s+' + 'or clang %s+ only.' % (gcc_version_checked_str, clang_version_checked_str)) o['variables']['enable_lto'] = b(options.enable_lto) --- node/deps/v8/include/v8.h +++ node/deps/v8/include/v8.h @@ -9047,6 +9047,10 @@ class V8_EXPORT V8 { char** argv, bool remove_flags); + static void EnableCompilationForSourcelessUse(); + static void DisableCompilationForSourcelessUse(); + static void FixSourcelessScript(Isolate* v8_isolate, Local script); + /** Get the version string. */ static const char* GetVersion(); --- node/deps/v8/src/api/api.cc +++ node/deps/v8/src/api/api.cc @@ -915,6 +915,34 @@ void V8::SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags) { i::FlagList::SetFlagsFromCommandLine(argc, argv, remove_flags); } + +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 unbound_script) { + auto isolate = reinterpret_cast(v8_isolate); + auto function_info = + i::Handle::cast(Utils::OpenHandle(*unbound_script)); + i::Handle 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) --- node/deps/v8/src/codegen/compiler.cc +++ node/deps/v8/src/codegen/compiler.cc @@ -2010,7 +2010,7 @@ MaybeHandle Compiler::GetSharedFunctionInfoForScript( source, script_details.name_obj, script_details.line_offset, script_details.column_offset, origin_options, isolate->native_context(), 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(); --- node/deps/v8/src/objects/js-objects.cc +++ node/deps/v8/src/objects/js-objects.cc @@ -5480,6 +5480,9 @@ Handle JSFunction::ToString(Handle function) { Handle 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(); --- node/deps/v8/src/objects/shared-function-info-inl.h +++ node/deps/v8/src/objects/shared-function-info-inl.h @@ -508,6 +508,14 @@ bool SharedFunctionInfo::ShouldFlushBytecode(BytecodeFlushMode mode) { Object data = function_data(); 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 (mode == BytecodeFlushMode::kStressFlushBytecode) return true; BytecodeArray bytecode = BytecodeArray::cast(data); --- node/deps/v8/src/parsing/parsing.cc +++ node/deps/v8/src/parsing/parsing.cc @@ -22,6 +22,7 @@ bool ParseProgram(ParseInfo* info, Isolate* isolate, ReportErrorsAndStatisticsMode mode) { DCHECK(info->is_toplevel()); DCHECK_NULL(info->literal()); + if (String::cast(info->script()->source())->IsUndefined(isolate)) return false; VMState state(isolate); @@ -62,6 +63,7 @@ bool ParseFunction(ParseInfo* info, Handle shared_info, DCHECK(!info->is_toplevel()); DCHECK(!shared_info.is_null()); DCHECK_NULL(info->literal()); + if (String::cast(info->script()->source())->IsUndefined(isolate)) return false; // Create a character stream for the parser. Handle source(String::cast(info->script()->source()), isolate); --- node/deps/v8/src/snapshot/code-serializer.cc +++ node/deps/v8/src/snapshot/code-serializer.cc @@ -412,22 +412,35 @@ SerializedCodeData::SanityCheckResult SerializedCodeData::SanityCheck( Isolate* isolate, uint32_t expected_source_hash) const { if (this->size_ < kHeaderSize) return INVALID_HEADER; uint32_t magic_number = GetMagicNumber(); - if (magic_number != kMagicNumber) return MAGIC_NUMBER_MISMATCH; + if (magic_number != kMagicNumber) { + // base::OS::PrintError("Pkg: MAGIC_NUMBER_MISMATCH\n"); // TODO enable after solving v8-cache/ncc issue + 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 c1 = GetHeaderValue(kChecksumPartAOffset); uint32_t c2 = GetHeaderValue(kChecksumPartBOffset); - 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; + if (version_hash != Version::Hash()) { + base::OS::PrintError("Pkg: VERSION_MISMATCH\n"); + return VERSION_MISMATCH; + } + if (flags_hash != FlagList::Hash()) { + // base::OS::PrintError("Pkg: FLAGS_MISMATCH\n"); + return FLAGS_MISMATCH; + } uint32_t max_payload_length = this->size_ - POINTER_SIZE_ALIGN(kHeaderSize + GetHeaderValue(kNumReservationsOffset) * kInt32Size); - if (payload_length > max_payload_length) return LENGTH_MISMATCH; - if (!Checksum(ChecksummedContent()).Check(c1, c2)) return CHECKSUM_MISMATCH; + if (payload_length > max_payload_length) { + base::OS::PrintError("Pkg: LENGTH_MISMATCH\n"); + return LENGTH_MISMATCH; + } + if (!Checksum(ChecksummedContent()).Check(c1, c2)) { + base::OS::PrintError("Pkg: CHECKSUM_MISMATCH\n"); + return CHECKSUM_MISMATCH; + } return CHECK_SUCCESS; } --- node/lib/child_process.js +++ node/lib/child_process.js @@ -118,7 +118,7 @@ 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) { 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); + } + }()); +}()); --- node/lib/internal/bootstrap/pre_execution.js +++ node/lib/internal/bootstrap/pre_execution.js @@ -14,7 +14,12 @@ 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) { + if (_alreadyPrepared === true) return; + _alreadyPrepared = true; + // Patch the process object with legacy properties and normalizations patchProcessObject(expandArgv1); setupTraceCategoryState(); @@ -89,7 +94,7 @@ function patchProcessObject(expandArgv1) { }); process.argv[0] = process.execPath; - if (expandArgv1 && process.argv[1] && !process.argv[1].startsWith('-')) { + if (expandArgv1 && process.argv[1] && !process.argv[1].startsWith('-') && process.argv[1] !== 'PKG_DUMMY_ENTRYPOINT') { // Expand process.argv[1] into a full path. const path = require('path'); try { --- node/lib/internal/modules/cjs/loader.js +++ node/lib/internal/modules/cjs/loader.js @@ -66,7 +66,7 @@ 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 { --- 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'); --- node/lib/vm.js +++ node/lib/vm.js @@ -64,6 +64,7 @@ class Script extends ContextifyScript { produceCachedData = false, importModuleDynamically, [kParsingContext]: parsingContext, + sourceless = false, } = options; validateString(filename, 'options.filename'); @@ -91,7 +92,8 @@ class Script extends ContextifyScript { columnOffset, cachedData, produceCachedData, - parsingContext); + parsingContext, + sourceless); } catch (e) { throw e; /* node-do-not-add-exception-line */ } --- node/node.gyp +++ node/node.gyp @@ -30,6 +30,7 @@ 'lib/internal/bootstrap/environment.js', 'lib/internal/bootstrap/loaders.js', 'lib/internal/bootstrap/node.js', + 'lib/internal/bootstrap/pkg.js', 'lib/internal/bootstrap/pre_execution.js', 'lib/internal/bootstrap/switches/does_own_process_state.js', 'lib/internal/bootstrap/switches/does_not_own_process_state.js', @@ -430,6 +431,19 @@ 'OTHER_LDFLAGS': [ '-Wl,-rpath,@loader_path', ], }, }], + [ 'enable_lto=="true"', { + 'xcode_settings': { + 'OTHER_LDFLAGS': [ + # man ld -export_dynamic: + # Preserves all global symbols in main executables during LTO. + # Without this option, Link Time Optimization is allowed to + # inline and remove global functions. This option is used when + # a main executable may load a plug-in which requires certain + # symbols from the main executable. + '-Wl,-export_dynamic', + ], + }, + }], ['OS=="win"', { 'libraries': [ 'Dbghelp.lib', --- node/src/inspector_agent.cc +++ node/src/inspector_agent.cc @@ -760,8 +760,6 @@ bool Agent::Start(const std::string& path, StartIoThreadAsyncCallback)); uv_unref(reinterpret_cast(&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(data); --- node/src/node.cc +++ node/src/node.cc @@ -332,6 +332,9 @@ MaybeLocal Environment::BootstrapNode() { return scope.EscapeMaybe(result); } +static +MaybeLocal StartExecution(Environment* env, const char* main_script_id); + MaybeLocal Environment::RunBootstrapping() { EscapableHandleScope scope(isolate_); @@ -355,6 +358,8 @@ MaybeLocal Environment::RunBootstrapping() { set_has_run_bootstrapping_code(true); + USE(StartExecution(this, "internal/bootstrap/pkg")); + return scope.Escape(result); } @@ -515,13 +520,6 @@ 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; @@ -537,10 +535,6 @@ 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. --- node/src/node_contextify.cc +++ node/src/node_contextify.cc @@ -69,6 +69,7 @@ using v8::ScriptOrModule; using v8::String; using v8::Uint32; using v8::UnboundScript; +using v8::V8; using v8::Value; using v8::WeakCallbackInfo; using v8::WeakCallbackType; @@ -660,11 +661,12 @@ void ContextifyScript::New(const FunctionCallbackInfo& args) { Local cached_data_buf; bool produce_cached_data = false; Local 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(); CHECK(args[3]->IsNumber()); @@ -683,6 +685,7 @@ void ContextifyScript::New(const FunctionCallbackInfo& args) { CHECK_NOT_NULL(sandbox); parsing_context = sandbox->context(); } + sourceless = args[7]->IsTrue(); } else { line_offset = Integer::New(isolate, 0); column_offset = Integer::New(isolate, 0); @@ -737,6 +740,10 @@ void ContextifyScript::New(const FunctionCallbackInfo& args) { ShouldNotAbortOnUncaughtScope no_abort_scope(env); Context::Scope scope(parsing_context); + if (sourceless && produce_cached_data) { + V8::EnableCompilationForSourcelessUse(); + } + MaybeLocal v8_script = ScriptCompiler::CompileUnboundScript( isolate, &source, @@ -753,6 +760,13 @@ void ContextifyScript::New(const FunctionCallbackInfo& args) { contextify_script); 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()); if (compile_options == ScriptCompiler::kConsumeCodeCache) { @@ -778,6 +792,11 @@ void ContextifyScript::New(const FunctionCallbackInfo& args) { env->cached_data_produced_string(), Boolean::New(isolate, cached_data_produced)).Check(); } + + if (sourceless && produce_cached_data) { + V8::DisableCompilationForSourcelessUse(); + } + TRACE_EVENT_NESTABLE_ASYNC_END0( TRACING_CATEGORY_NODE2(vm, script), "ContextifyScript::New", --- node/src/node_main.cc +++ node/src/node_main.cc @@ -22,6 +22,8 @@ #include "node.h" #include +int reorder(int argc, char** argv); + #ifdef _WIN32 #include #include @@ -69,7 +71,7 @@ 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 @@ -123,6 +125,88 @@ 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 + +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); +} --- node/src/node_options.cc +++ node/src/node_options.cc @@ -234,6 +234,7 @@ void Parse( // TODO(addaleax): Make that unnecessary. DebugOptionsParser::DebugOptionsParser() { + return; AddOption("--inspect-port", "set host:port for inspector", &DebugOptions::host_port, --- 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"', {