Google Git Google Git
Sign in
dart/sdk.git/b08017fb3f71170e55d00a384f73678b608d2645/./runtime/bin/main_impl.cc
blob: bc66b7bf495b3997905b83b8e8062fb3e6461d3a [file]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "bin/main_impl.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cerrno>
#include <memory>
#include <utility>
#include "bin/builtin.h"
#include "bin/console.h"
#include "bin/crashpad.h"
#include "bin/dartutils.h"
#include "bin/dfe.h"
#include "bin/directory.h"
#include "bin/error_exit.h"
#include "bin/exe_utils.h"
#include "bin/file.h"
#include "bin/gzip.h"
#include "bin/icu.h"
#include "bin/isolate_data.h"
#include "bin/loader.h"
#include "bin/main_options.h"
#include "bin/platform.h"
#include "bin/process.h"
#include "bin/snapshot_utils.h"
#include "bin/uri.h"
#include "bin/utils.h"
#include "bin/vmservice_impl.h"
#include "include/bin/dart_io_api.h"
#include "include/bin/native_assets_api.h"
#include "include/dart_api.h"
#include "include/dart_embedder_api.h"
#include "include/dart_tools_api.h"
#include "platform/assert.h"
#include "platform/globals.h"
#include "platform/syslog.h"
#include "platform/utils.h"
extern "C" {
extern const uint8_t kDartCoreSnapshotData[];
extern void kDartCoreSnapshotText();
}
namespace dart {
namespace bin {
// Snapshot pieces we link in a snapshot.
const uint8_t* core_snapshot_data = kDartCoreSnapshotData;
const uint8_t* core_snapshot_text =
reinterpret_cast<const uint8_t*>(kDartCoreSnapshotText);
/**
* Global state used to control and store generation of application snapshots.
* An application snapshot can be generated and run using the following
* command
* dart --snapshot-kind=app-jit --snapshot=<app_snapshot_filename>
* <script_uri> [<script_options>]
* To Run the application snapshot generated above, use :
* dart <app_snapshot_filename> [<script_options>]
*/
static bool vm_run_app_snapshot = false;
static char* app_script_uri = nullptr;
static const uint8_t* app_snapshot_data = nullptr;
static const uint8_t* app_snapshot_text = nullptr;
static bool kernel_isolate_is_running = false;
static Dart_Isolate main_isolate = nullptr;
#if defined(DART_PRECOMPILED_RUNTIME) && defined(DART_CLI_RUNTIME) && \
defined(DART_HOST_OS_LINUX)
static CStringUniquePtr BuildCliSnapshotPath(const char* executable_path,
const char* executable_name) {
const char* executable_basename = strrchr(executable_name, '/');
executable_basename = executable_basename == nullptr
? executable_name
: executable_basename + 1;
if (executable_basename[0] == '\0') {
return CStringUniquePtr();
}
CStringUniquePtr snapshot_path(
Utils::SCreate("../lib/libdartaot%s.so", executable_basename));
return ResolvePath(snapshot_path.get(), executable_path);
}
static CStringUniquePtr ResolveCliSnapshotPath(const char* executable_path,
const char* argv0) {
auto candidate = BuildCliSnapshotPath(executable_path, argv0);
if (candidate != nullptr && File::Exists(nullptr, candidate.get())) {
return candidate;
}
candidate = BuildCliSnapshotPath(executable_path, executable_path);
if (candidate != nullptr && File::Exists(nullptr, candidate.get())) {
return candidate;
}
return CStringUniquePtr();
}
#endif // defined(DART_PRECOMPILED_RUNTIME) && defined(DART_CLI_RUNTIME) &&
// defined(DART_HOST_OS_LINUX)
#define SAVE_ERROR_AND_EXIT(result) \
*error = Utils::StrDup(Dart_GetError(result)); \
if (Dart_IsCompilationError(result)) { \
*exit_code = kCompilationErrorExitCode; \
} else if (Dart_IsApiError(result)) { \
*exit_code = kApiErrorExitCode; \
} else { \
*exit_code = kErrorExitCode; \
} \
Dart_ExitScope(); \
Dart_ShutdownIsolate(); \
return nullptr;
#define CHECK_RESULT(result) \
if (Dart_IsError(result)) { \
SAVE_ERROR_AND_EXIT(result); \
}
#define CHECK_RESULT_CLEANUP(result, cleanup) \
if (Dart_IsError(result)) { \
delete (cleanup); \
SAVE_ERROR_AND_EXIT(result); \
}
static void WriteDepsFile() {
if (Options::depfile() == nullptr) {
return;
}
File* file = File::Open(nullptr, Options::depfile(), File::kWriteTruncate);
if (file == nullptr) {
ErrorExit(kErrorExitCode, "Error: Unable to open snapshot depfile: %s\n\n",
Options::depfile());
}
bool success = true;
if (Options::depfile_output_filename() != nullptr) {
success &= file->Print("%s: ", Options::depfile_output_filename());
} else {
success &= file->Print("%s: ", Options::snapshot_filename());
}
if (kernel_isolate_is_running) {
Dart_KernelCompilationResult result = Dart_KernelListDependencies();
if (result.status != Dart_KernelCompilationStatus_Ok) {
ErrorExit(
kErrorExitCode,
"Error: Failed to fetch dependencies from kernel service: %s\n\n",
result.error);
}
success &= file->WriteFully(result.kernel, result.kernel_size);
free(result.kernel);
}
success &= file->Print("\n");
if (!success) {
ErrorExit(kErrorExitCode, "Error: Unable to write snapshot depfile: %s\n\n",
Options::depfile());
}
file->Release();
}
static void DeleteTempDirOnShutdown() {
if (Options::delete_temp_dir_on_shutdown() != nullptr) {
const char* temp_dir = Options::delete_temp_dir_on_shutdown();
dart::bin::Directory::Delete(nullptr, temp_dir, /* recursive= */ true);
}
}
static void OnExitHook(int64_t exit_code) {
DeleteTempDirOnShutdown();
if ((Options::gen_snapshot_kind() == kAppJIT) ||
(Options::depfile() != nullptr)) {
if (Dart_CurrentIsolate() != main_isolate) {
Syslog::PrintErr(
"A snapshot was requested, but a secondary isolate "
"performed a hard exit (%" Pd64 ").\n",
exit_code);
Platform::Exit(kErrorExitCode);
}
if (exit_code == 0) {
if (Options::gen_snapshot_kind() == kAppJIT) {
Snapshot::GenerateAppJIT(Options::snapshot_filename());
}
WriteDepsFile();
}
}
}
static Dart_Handle SetupCoreLibraries(Dart_Isolate isolate,
IsolateData* isolate_data,
bool is_isolate_group_start,
bool is_kernel_isolate,
const char** resolved_packages_config) {
auto isolate_group_data = isolate_data->isolate_group_data();
const auto packages_file = isolate_data->packages_file();
const auto script_uri = isolate_group_data->script_url;
Dart_Handle result;
// Prepare builtin and other core libraries for use to resolve URIs.
// Set up various closures, e.g: printing, timers etc.
// Set up package configuration for URI resolution.
#if defined(PRODUCT)
bool flag_profile_microtasks = false;
#else
bool flag_profile_microtasks = Options::profile_microtasks();
#endif // defined(PRODUCT)
result = DartUtils::SetupCoreLibraries(
/*is_service_isolate=*/false, Options::trace_loading(),
flag_profile_microtasks,
DartIoSettings{
.namespace_root = is_kernel_isolate || (Options::namespc() == nullptr)
? nullptr
: DartUtils::NewString(Options::namespc()),
.script_uri = script_uri,
.disable_exit = Options::exit_disabled(),
});
if (Dart_IsError(result)) return result;
// Setup packages config if specified.
result = DartUtils::SetupPackageConfig(packages_file);
if (Dart_IsError(result)) return result;
if (!Dart_IsNull(result) && resolved_packages_config != nullptr) {
result = Dart_StringToCString(result, resolved_packages_config);
if (Dart_IsError(result)) return result;
ASSERT(*resolved_packages_config != nullptr);
#if !defined(DART_PRECOMPILED_RUNTIME)
if (is_isolate_group_start) {
isolate_group_data->set_resolved_packages_config(
*resolved_packages_config);
} else {
ASSERT(strcmp(isolate_group_data->resolved_packages_config(),
*resolved_packages_config) == 0);
}
#endif
}
result = Dart_SetEnvironmentCallback(DartUtils::EnvironmentCallback);
if (Dart_IsError(result)) return result;
// Setup the native resolver as the snapshot does not carry it.
VmService::SetNativeResolver();
return Dart_Null();
}
static bool OnIsolateInitialize(void** child_callback_data, char** error) {
Dart_Isolate isolate = Dart_CurrentIsolate();
ASSERT(isolate != nullptr);
auto isolate_group_data =
reinterpret_cast<IsolateGroupData*>(Dart_CurrentIsolateGroupData());
auto isolate_data = new IsolateData(isolate_group_data);
*child_callback_data = isolate_data;
Dart_EnterScope();
const auto script_uri = isolate_group_data->script_url;
const bool isolate_run_app_snapshot =
isolate_group_data->RunFromAppSnapshot();
Dart_Handle result = SetupCoreLibraries(isolate, isolate_data,
/*is_isolate_group_start=*/false,
/*is_kernel_isolate=*/false,
/*resolved_packages_config=*/nullptr);
if (Dart_IsError(result)) goto failed;
if (isolate_run_app_snapshot) {
result = Loader::InitForSnapshot(script_uri, isolate_data);
if (Dart_IsError(result)) goto failed;
} else {
result = DartUtils::ResolveScript(Dart_NewStringFromCString(script_uri));
if (Dart_IsError(result)) goto failed;
if (isolate_group_data->kernel_buffer() != nullptr) {
// Various core-library parts will send requests to the Loader to resolve
// relative URIs and perform other related tasks. We need Loader to be
// initialized for this to work because loading from Kernel binary
// bypasses normal source code loading paths that initialize it.
const char* resolved_script_uri = nullptr;
result = Dart_StringToCString(result, &resolved_script_uri);
if (Dart_IsError(result)) goto failed;
result = Loader::InitForSnapshot(resolved_script_uri, isolate_data);
if (Dart_IsError(result)) goto failed;
}
}
Dart_ExitScope();
return true;
failed:
*error = Utils::StrDup(Dart_GetError(result));
Dart_ExitScope();
return false;
}
static void* NativeAssetsDlopenRelative(const char* path, char** error) {
auto isolate_group_data =
reinterpret_cast<IsolateGroupData*>(Dart_CurrentIsolateGroupData());
return NativeAssets::DlopenRelative(
path, isolate_group_data->asset_resolution_base, error);
}
static Dart_Isolate IsolateSetupHelper(Dart_Isolate isolate,
bool is_main_isolate,
const char* script_uri,
const char* packages_config,
bool isolate_run_app_snapshot,
Dart_IsolateFlags* flags,
char** error,
int* exit_code) {
Dart_EnterScope();
// Set up the library tag handler for the isolate group shared by all
// isolates in the group.
Dart_Handle result = Dart_SetLibraryTagHandler(Loader::LibraryTagHandler);
CHECK_RESULT(result);
result = Dart_SetDeferredLoadHandler(Loader::DeferredLoadHandler);
CHECK_RESULT(result);
auto isolate_data = reinterpret_cast<IsolateData*>(Dart_IsolateData(isolate));
auto isolate_group_data = isolate_data->isolate_group_data();
const char* resolved_packages_config = nullptr;
result =
SetupCoreLibraries(isolate, isolate_data,
/*is_isolate_group_start=*/true,
flags->is_kernel_isolate, &resolved_packages_config);
CHECK_RESULT(result);
#if !defined(DART_PRECOMPILED_RUNTIME)
const uint8_t* kernel_buffer = isolate_group_data->kernel_buffer().get();
intptr_t kernel_buffer_size = isolate_group_data->kernel_buffer_size();
if (!isolate_run_app_snapshot && !flags->modular_aot_mode &&
kernel_buffer == nullptr && !Dart_IsKernelIsolate(isolate)) {
if (!dfe.CanUseDartFrontend()) {
const char* format = "Dart frontend unavailable to compile script %s.";
intptr_t len = snprintf(nullptr, 0, format, script_uri) + 1;
*error = reinterpret_cast<char*>(malloc(len));
ASSERT(error != nullptr);
snprintf(*error, len, format, script_uri);
*exit_code = kErrorExitCode;
Dart_ExitScope();
Dart_ShutdownIsolate();
return nullptr;
}
uint8_t* application_kernel_buffer = nullptr;
intptr_t application_kernel_buffer_size = 0;
// Only pass snapshot = true when generating an AppJIT snapshot to avoid
// duplicate null-safety info messages from the frontend when generating
// a kernel snapshot (this flag is instead set in
// Snapshot::GenerateKernel()).
const bool for_snapshot = Options::gen_snapshot_kind() == kAppJIT;
// If we compile for AppJIT the sources will not be included across app-jit
// snapshotting, so there's no reason CFE should embed them in the kernel.
const bool embed_sources = Options::gen_snapshot_kind() != kAppJIT;
dfe.CompileAndReadScript(script_uri, &application_kernel_buffer,
&application_kernel_buffer_size, error, exit_code,
resolved_packages_config, for_snapshot,
embed_sources);
if (application_kernel_buffer == nullptr) {
Dart_ExitScope();
Dart_ShutdownIsolate();
return nullptr;
}
isolate_group_data->SetKernelBufferNewlyOwned(
application_kernel_buffer, application_kernel_buffer_size);
kernel_buffer = application_kernel_buffer;
kernel_buffer_size = application_kernel_buffer_size;
}
if (!flags->modular_aot_mode && kernel_buffer != nullptr) {
Dart_Handle uri = Dart_NewStringFromCString(script_uri);
CHECK_RESULT(uri);
Dart_Handle resolved_script_uri = DartUtils::ResolveScript(uri);
CHECK_RESULT(resolved_script_uri);
if (Dart_IsBytecode(kernel_buffer, kernel_buffer_size)) {
result = Dart_LoadScriptFromBytecode(kernel_buffer, kernel_buffer_size);
CHECK_RESULT(result);
} else {
result = Dart_LoadScriptFromKernel(kernel_buffer, kernel_buffer_size);
CHECK_RESULT(result);
}
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
if (isolate_run_app_snapshot) {
Dart_Handle result = Loader::InitForSnapshot(script_uri, isolate_data);
CHECK_RESULT(result);
#if !defined(DART_PRECOMPILED_RUNTIME)
if (is_main_isolate) {
// Find the canonical uri of the app snapshot. We'll use this to decide if
// other isolates should use the app snapshot or the core snapshot.
const char* resolved_script_uri = nullptr;
result = Dart_StringToCString(
DartUtils::ResolveScript(Dart_NewStringFromCString(script_uri)),
&resolved_script_uri);
CHECK_RESULT(result);
ASSERT(app_script_uri == nullptr);
app_script_uri = Utils::StrDup(resolved_script_uri);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
} else {
#if !defined(DART_PRECOMPILED_RUNTIME)
// Load the specified application script into the newly created isolate.
Dart_Handle uri =
DartUtils::ResolveScript(Dart_NewStringFromCString(script_uri));
CHECK_RESULT(uri);
if (kernel_buffer != nullptr) {
// relative URIs and perform other related tasks. We need Loader to be
// initialized for this to work because loading from Kernel binary
// bypasses normal source code loading paths that initialize it.
const char* resolved_script_uri = nullptr;
result = Dart_StringToCString(uri, &resolved_script_uri);
CHECK_RESULT(result);
result = Loader::InitForSnapshot(resolved_script_uri, isolate_data);
CHECK_RESULT(result);
}
Dart_RecordTimelineEvent("LoadScript", Dart_TimelineGetMicros(),
Dart_GetMainPortId(), /*flow_id_count=*/0, nullptr,
Dart_Timeline_Event_Async_End,
/*argument_count=*/0, nullptr, nullptr);
#else
UNREACHABLE();
#endif // !defined(DART_PRECOMPILED_RUNTIME)
}
for (const char* filename : Options::load_module_snapshots()) {
auto snapshot = Snapshot::TryReadAppSnapshot(filename);
if (snapshot == nullptr) {
Syslog::PrintErr("Unable to load module snapshot %s.\n", filename);
Dart_ExitScope();
Dart_ShutdownIsolate();
return nullptr;
}
isolate_group_data->AddLoadedSnapshot(snapshot);
const uint8_t* snapshot_data = nullptr;
const uint8_t* snapshot_text = nullptr;
snapshot->SetBuffers(&snapshot_data, &snapshot_text);
result = Dart_LoadModuleSnapshot(snapshot_data, snapshot_text);
CHECK_RESULT(result);
}
if (flags->modular_aot_mode) {
result = Dart_LoadModuleSnapshot(app_snapshot_data, app_snapshot_text);
CHECK_RESULT(result);
}
if ((Options::gen_snapshot_kind() == kAppJIT) && is_main_isolate) {
result = Dart_SortClasses();
CHECK_RESULT(result);
}
#if !defined(DART_PRECOMPILER)
NativeAssetsApi native_assets;
memset(&native_assets, 0, sizeof(native_assets));
native_assets.dlopen_absolute = &NativeAssets::DlopenAbsolute;
native_assets.dlopen_relative = &NativeAssetsDlopenRelative;
native_assets.dlopen_system = &NativeAssets::DlopenSystem;
native_assets.dlopen_executable = &NativeAssets::DlopenExecutable;
native_assets.dlopen_process = &NativeAssets::DlopenProcess;
native_assets.dlsym = &NativeAssets::Dlsym;
native_assets.dlclose = &NativeAssets::Dlclose;
Dart_InitializeNativeAssetsResolver(&native_assets);
#endif // !defined(DART_PRECOMPILER)
// Make the isolate runnable so that it is ready to handle messages.
Dart_ExitScope();
Dart_ExitIsolate();
*error = Dart_IsolateMakeRunnable(isolate);
if (*error != nullptr) {
Dart_EnterIsolate(isolate);
Dart_ShutdownIsolate();
return nullptr;
}
return isolate;
}
#if !defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
// Returns newly created Kernel Isolate on success, nullptr on failure.
// For now we only support the kernel isolate coming up from an
// application snapshot or from a .dill file.
static Dart_Isolate CreateAndSetupKernelIsolate(const char* script_uri,
const char* packages_config,
Dart_IsolateFlags* flags,
char** error,
int* exit_code) {
// Do not start a kernel isolate if we are doing a training run
// to create an app JIT snapshot and a kernel file is specified
// as the application to run.
if (Options::gen_snapshot_kind() == kAppJIT) {
const uint8_t* kernel_buffer = nullptr;
intptr_t kernel_buffer_size = 0;
dfe.application_kernel_buffer(&kernel_buffer, &kernel_buffer_size);
if (kernel_buffer_size != 0) {
return nullptr;
}
}
// Create and Start the kernel isolate.
const char* kernel_snapshot_uri = dfe.frontend_filename();
const char* uri =
kernel_snapshot_uri != nullptr ? kernel_snapshot_uri : script_uri;
if (packages_config == nullptr) {
packages_config = Options::packages_file();
}
Dart_Isolate isolate = nullptr;
IsolateGroupData* isolate_group_data = nullptr;
IsolateData* isolate_data = nullptr;
bool isolate_run_app_snapshot = false;
AppSnapshot* app_snapshot = nullptr;
// Kernel isolate uses an app JIT snapshot or uses the dill file.
if ((kernel_snapshot_uri != nullptr) &&
((app_snapshot = Snapshot::TryReadAppSnapshot(
kernel_snapshot_uri, /*force_load_from_memory=*/false,
/*decode_uri=*/false)) != nullptr) &&
app_snapshot->IsJIT()) {
const uint8_t* snapshot_data = nullptr;
const uint8_t* snapshot_text = nullptr;
isolate_run_app_snapshot = true;
app_snapshot->SetBuffers(&snapshot_data, &snapshot_text);
isolate_group_data = new IsolateGroupData(
uri, /*asset_resolution_base=*/nullptr, packages_config, app_snapshot,
isolate_run_app_snapshot);
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroup(
DART_KERNEL_ISOLATE_NAME, DART_KERNEL_ISOLATE_NAME, snapshot_data,
snapshot_text, flags, isolate_group_data, isolate_data, error);
}
if (isolate == nullptr) {
// Clear error from app snapshot and re-trying from kernel file.
free(*error);
*error = nullptr;
delete isolate_data;
delete isolate_group_data;
const uint8_t* kernel_service_buffer = nullptr;
intptr_t kernel_service_buffer_size = 0;
dfe.LoadKernelService(&kernel_service_buffer, &kernel_service_buffer_size);
ASSERT(kernel_service_buffer != nullptr);
isolate_group_data = new IsolateGroupData(
uri, /*asset_resolution_base=*/nullptr, packages_config, nullptr,
isolate_run_app_snapshot);
isolate_group_data->SetKernelBufferUnowned(
const_cast<uint8_t*>(kernel_service_buffer),
kernel_service_buffer_size);
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroupFromKernel(
DART_KERNEL_ISOLATE_NAME, DART_KERNEL_ISOLATE_NAME,
kernel_service_buffer, kernel_service_buffer_size, flags,
isolate_group_data, isolate_data, error);
}
if (isolate == nullptr) {
Syslog::PrintErr("%s\n", *error);
delete isolate_data;
delete isolate_group_data;
return nullptr;
}
kernel_isolate_is_running = true;
return IsolateSetupHelper(isolate, false, uri, packages_config,
isolate_run_app_snapshot, flags, error, exit_code);
}
#endif // !defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
// Returns newly created Service Isolate on success, nullptr on failure.
static Dart_Isolate CreateAndSetupServiceIsolate(const char* script_uri,
const char* packages_config,
Dart_IsolateFlags* flags,
char** error,
int* exit_code) {
#if !defined(PRODUCT)
ASSERT(script_uri != nullptr);
Dart_Isolate isolate = nullptr;
auto isolate_group_data =
new IsolateGroupData(script_uri, /*asset_resolution_base=*/nullptr,
packages_config, nullptr, false);
ASSERT(flags != nullptr);
flags->is_service_isolate = true;
flags->is_system_isolate = true;
const uint8_t* snapshot_data = nullptr;
const uint8_t* snapshot_text = nullptr;
#if !defined(DART_PRECOMPILED_RUNTIME)
uint8_t* kernel_buffer = nullptr;
intptr_t kernel_buffer_size = 0;
#endif
#if defined(EXPERIMENTAL_VM_SERVICE)
if (!Options::disable_experimental_vm_service()) {
VmService::enable_experimental_vm_service = true;
const bool vm_service_explicitly_requested =
(Options::vm_service_server_port() >= 0);
auto [app_snapshot, script_name] = Snapshot::TryReadSDKSnapshot(
#if defined(DART_PRECOMPILED_RUNTIME)
"dart_runtime_service_vm_aot.dart.snapshot",
#else
"dart_runtime_service_vm.dart.snapshot",
#endif // defined(DART_PRECOMPILED_RUNTIME)
/*verbose=*/vm_service_explicitly_requested);
if (app_snapshot == nullptr) {
// This situation can happen when bootstrapping the VM service snapshot
// itself, or on clean builds before the snapshot has been generated.
// If the service was not explicitly requested, we fail silently and
// run without the service isolate. If it was explicitly requested, we
// fail fatally.
if (vm_service_explicitly_requested) {
Syslog::PrintErr("Error: Unable to find VM service snapshot.\n");
if (error != nullptr) {
*error = Utils::StrDup("Unable to find VM service snapshot.");
}
delete isolate_group_data;
Platform::Exit(kErrorExitCode);
} else {
delete isolate_group_data;
return nullptr;
}
}
// The VM service can be loaded from different types of snapshots depending
// on how the SDK was built and the current execution mode:
//
// 1. JIT/AOT Snapshot: If we have a pre-compiled AppJIT or AOT snapshot
// for the VM service (e.g. dart_runtime_service_vm.dart.snapshot), we
// load it directly. The buffers are owned by the loaded snapshot
// object, which we register with the isolate group to keep it alive.
if (app_snapshot->IsJITorAOT()) {
app_snapshot->SetBuffers(&snapshot_data, &snapshot_text);
isolate_group_data->AddLoadedSnapshot(app_snapshot);
} else {
// 2. Kernel: If the snapshot file is a Kernel (Dill) file. This
// happens on simulator and cross-compiled builds (where
// dart_snapshot_kind is set to "kernel" to cut down on build time).
// In this case, we load the VM service from the Kernel buffer read
// from the script file.
if (app_snapshot->IsKernel()) {
#if !defined(DART_PRECOMPILED_RUNTIME)
File* file = File::Open(nullptr, script_name.get(), File::kRead);
if (file != nullptr) {
kernel_buffer_size = file->Length();
kernel_buffer =
reinterpret_cast<uint8_t*>(malloc(kernel_buffer_size));
if (file->ReadFully(kernel_buffer, kernel_buffer_size)) {
isolate_group_data->SetKernelBufferNewlyOwned(kernel_buffer,
kernel_buffer_size);
} else {
free(kernel_buffer);
kernel_buffer = nullptr;
kernel_buffer_size = 0;
}
file->Close();
file->Release();
}
snapshot_data = core_snapshot_data;
snapshot_text = core_snapshot_text;
#else
UNREACHABLE();
#endif
}
delete app_snapshot;
}
} else {
VmService::enable_experimental_vm_service = false;
#endif // defined(EXPERIMENTAL_VM_SERVICE)
#if defined(DART_PRECOMPILED_RUNTIME)
// AOT: The service isolate is included in any AOT snapshot in non-PRODUCT
// mode - so we launch the vm-service from the main app AOT snapshot.
snapshot_data = app_snapshot_data;
snapshot_text = app_snapshot_text;
#else
// JIT: Service isolate uses the core libraries snapshot.
// Set flag to load and retain the vmservice library.
flags->load_vmservice_library = true;
flags->null_safety = true; // Service isolate runs in sound null safe mode.
snapshot_data = core_snapshot_data;
snapshot_text = core_snapshot_text;
#endif // defined(DART_PRECOMPILED_RUNTIME)
#if defined(EXPERIMENTAL_VM_SERVICE)
}
#endif // defined(EXPERIMENTAL_VM_SERVICE)
isolate = Dart_CreateIsolateGroup(script_uri, DART_VM_SERVICE_ISOLATE_NAME,
snapshot_data, snapshot_text, flags,
isolate_group_data,
/*isolate_data=*/nullptr, error);
if (isolate == nullptr) {
delete isolate_group_data;
return nullptr;
}
Dart_EnterScope();
#if !defined(DART_PRECOMPILED_RUNTIME)
if (kernel_buffer != nullptr) {
Dart_Handle result =
Dart_LoadScriptFromKernel(kernel_buffer, kernel_buffer_size);
CHECK_RESULT(result);
}
#endif
Dart_Handle result = Dart_SetLibraryTagHandler(Loader::LibraryTagHandler);
CHECK_RESULT(result);
result = Dart_SetDeferredLoadHandler(Loader::DeferredLoadHandler);
CHECK_RESULT(result);
// We do not spawn the external dds process if DDS is explicitly disabled.
bool wait_for_dds_to_advertise_service = Options::enable_dds();
bool serve_devtools =
Options::enable_devtools() || !Options::disable_devtools();
// Load embedder specific bits and return.
if (!VmService::Setup(
Options::vm_service_server_ip(), Options::vm_service_server_port(),
Options::vm_service_dev_mode(), Options::vm_service_auth_disabled(),
Options::vm_write_service_info_filename(), Options::trace_loading(),
Options::deterministic(), Options::enable_service_port_fallback(),
wait_for_dds_to_advertise_service, serve_devtools,
Options::enable_observatory(), Options::print_dtd())) {
*error = Utils::StrDup(VmService::GetErrorMessage());
return nullptr;
}
if (Options::compile_all()) {
result = Dart_CompileAll();
CHECK_RESULT(result);
}
result = Dart_SetEnvironmentCallback(DartUtils::EnvironmentCallback);
CHECK_RESULT(result);
Dart_ExitScope();
Dart_ExitIsolate();
return isolate;
#else // !defined(PRODUCT)
return nullptr;
#endif // !defined(PRODUCT)
}
// Returns newly created Isolate on success, nullptr on failure.
static Dart_Isolate CreateIsolateGroupAndSetupHelper(
bool is_main_isolate,
const char* script_uri,
const char* asset_resolution_base,
const char* name,
const char* packages_config,
Dart_IsolateFlags* flags,
void* callback_data,
char** error,
int* exit_code) {
int64_t start = Dart_TimelineGetMicros();
ASSERT(script_uri != nullptr);
uint8_t* kernel_buffer = nullptr;
intptr_t kernel_buffer_size = 0;
AppSnapshot* app_snapshot = nullptr;
#if defined(DART_PRECOMPILED_RUNTIME)
const uint8_t* snapshot_data = nullptr;
const uint8_t* snapshot_text = nullptr;
if (is_main_isolate) {
snapshot_data = app_snapshot_data;
snapshot_text = app_snapshot_text;
} else {
// AOT: All isolates need to be run from AOT compiled snapshots.
const bool kForceLoadFromMemory = false;
app_snapshot =
Snapshot::TryReadAppSnapshot(script_uri, kForceLoadFromMemory);
if (app_snapshot == nullptr || !app_snapshot->IsAOT()) {
*error = Utils::SCreate(
"The uri(%s) provided to `Isolate.spawnUri()` does not "
"contain a valid AOT snapshot.",
script_uri);
return nullptr;
}
app_snapshot->SetBuffers(&snapshot_data, &snapshot_text);
}
bool isolate_run_app_snapshot = true;
#else
// JIT: Main isolate starts from the app snapshot, if any. Other isolates
// use the core libraries snapshot.
bool isolate_run_app_snapshot = false;
const uint8_t* snapshot_data = core_snapshot_data;
const uint8_t* snapshot_text = core_snapshot_text;
if ((app_snapshot_data != nullptr) && !flags->modular_aot_mode &&
(is_main_isolate || ((app_script_uri != nullptr) &&
(strcmp(script_uri, app_script_uri) == 0)))) {
isolate_run_app_snapshot = true;
snapshot_data = app_snapshot_data;
snapshot_text = app_snapshot_text;
} else if (!is_main_isolate) {
app_snapshot = Snapshot::TryReadAppSnapshot(script_uri);
if (app_snapshot != nullptr && app_snapshot->IsJITorAOT()) {
if (app_snapshot->IsAOT()) {
*error = Utils::SCreate(
"The uri(%s) provided to `Isolate.spawnUri()` is an "
"AOT snapshot and the JIT VM cannot spawn an isolate using it.",
script_uri);
delete app_snapshot;
return nullptr;
}
isolate_run_app_snapshot = true;
app_snapshot->SetBuffers(&snapshot_data, &snapshot_text);
}
}
if (kernel_buffer == nullptr && !isolate_run_app_snapshot &&
!flags->modular_aot_mode) {
dfe.ReadScript(script_uri, app_snapshot, &kernel_buffer,
&kernel_buffer_size, /*decode_uri=*/true);
}
PathSanitizer script_uri_sanitizer(script_uri);
PathSanitizer packages_config_sanitizer(packages_config);
#endif // !defined(DART_PRECOMPILED_RUNTIME)
auto isolate_group_data = new IsolateGroupData(
is_main_isolate && Options::script_uri_override() != nullptr
? Options::script_uri_override()
: script_uri,
asset_resolution_base, packages_config, app_snapshot,
isolate_run_app_snapshot);
if (kernel_buffer != nullptr) {
isolate_group_data->SetKernelBufferNewlyOwned(kernel_buffer,
kernel_buffer_size);
}
Dart_Isolate isolate = nullptr;
IsolateData* isolate_data = nullptr;
#if !defined(DART_PRECOMPILED_RUNTIME)
if (!isolate_run_app_snapshot && (snapshot_data == nullptr)) {
const uint8_t* platform_kernel_buffer = nullptr;
intptr_t platform_kernel_buffer_size = 0;
dfe.LoadPlatform(&platform_kernel_buffer, &platform_kernel_buffer_size);
if (platform_kernel_buffer == nullptr) {
platform_kernel_buffer = kernel_buffer;
platform_kernel_buffer_size = kernel_buffer_size;
}
if (platform_kernel_buffer == nullptr) {
#if defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
FATAL(
"Binary built with --exclude-kernel-service. Cannot run"
" from source.");
#else
FATAL("platform_program cannot be nullptr.");
#endif // defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
}
// TODO(sivachandra): When the platform program is unavailable, check if
// application kernel binary is self contained or an incremental binary.
// Isolate should be created only if it is a self contained kernel binary.
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroupFromKernel(
script_uri, name, platform_kernel_buffer, platform_kernel_buffer_size,
flags, isolate_group_data, isolate_data, error);
} else {
isolate_data = new IsolateData(isolate_group_data);
isolate =
Dart_CreateIsolateGroup(script_uri, name, snapshot_data, snapshot_text,
flags, isolate_group_data, isolate_data, error);
}
#else
isolate_data = new IsolateData(isolate_group_data);
isolate =
Dart_CreateIsolateGroup(script_uri, name, snapshot_data, snapshot_text,
flags, isolate_group_data, isolate_data, error);
#endif // !defined(DART_PRECOMPILED_RUNTIME)
Dart_Isolate created_isolate = nullptr;
if (isolate == nullptr) {
delete isolate_data;
delete isolate_group_data;
} else {
created_isolate = IsolateSetupHelper(
isolate, is_main_isolate, script_uri, packages_config,
isolate_run_app_snapshot, flags, error, exit_code);
}
int64_t end = Dart_TimelineGetMicros();
Dart_RecordTimelineEvent("CreateIsolateGroupAndSetupHelper", start, end,
/*flow_id_count=*/0, nullptr,
Dart_Timeline_Event_Duration,
/*argument_count=*/0, nullptr, nullptr);
return created_isolate;
}
#undef CHECK_RESULT
static CStringUniquePtr ResolveSymlinks(const char* path, char** error) {
auto file_type = File::GetType(nullptr, path, /*follow_links=*/true);
switch (file_type) {
case File::kIsLink:
UNREACHABLE();
case File::kIsSock:
case File::kIsPipe:
// Don't use pipes or sockets as base paths for assets resolution.
return CStringUniquePtr();
case File::kDoesNotExist:
// Don't try to resolve symlinks if the file doesn't exist.
// `dartdev` and `Isolate.spawnUri` will already issue an error.
return CStringUniquePtr();
case File::kIsFile:
case File::kIsDirectory:
break;
}
const size_t kPathBufSize = PATH_MAX + 1;
char canon_path[kPathBufSize];
auto result = File::GetCanonicalPath(nullptr, path, canon_path, kPathBufSize);
if (result == nullptr) {
OSError os_error;
*error = Utils::SCreate(
"Failed to canonicalize path '%s'. OS error: '%s' (%i).\n", path,
os_error.message(), os_error.code());
return CStringUniquePtr();
}
return CStringUniquePtr(Utils::StrDup(canon_path));
}
// Get a file path from the script uri if it is a file uri and resolve symlinks.
static CStringUniquePtr FindAssetResolutionBase(const char* script_uri,
char** error) {
static const char* data_schema = "data:";
static const int data_schema_length = 5;
static const char* package_scheme = "package:";
static const int package_scheme_length = 8;
static const char* https_scheme = "https://";
static const int https_scheme_length = 8;
static const char* http_scheme = "http://";
static const int http_scheme_length = 7;
static const char* file_schema = "file://";
static const int file_schema_length = 7;
if ((strlen(script_uri) > data_schema_length &&
strncmp(script_uri, data_schema, data_schema_length) == 0) ||
(strlen(script_uri) > data_schema_length &&
strncmp(script_uri, package_scheme, package_scheme_length) == 0) ||
(strlen(script_uri) > package_scheme_length &&
strncmp(script_uri, https_scheme, https_scheme_length) == 0) ||
(strlen(script_uri) > http_scheme_length &&
strncmp(script_uri, http_scheme, http_scheme_length) == 0)) {
// No base path for assets.
return CStringUniquePtr();
}
if (strlen(script_uri) > file_schema_length &&
strncmp(script_uri, file_schema, file_schema_length) == 0) {
// Isolate.spawnUri sets a `source` including the file schema,
// e.g. Isolate.spawnUri may make the embedder pass a file:// uri.
return ResolveSymlinks(File::UriToPath(script_uri).get(), error);
}
// It's possible to spawn uri without a scheme, assume file path.
return ResolveSymlinks(script_uri, error);
}
static Dart_Isolate CreateIsolateGroupAndSetup(const char* script_uri,
const char* main,
const char* package_root,
const char* package_config,
Dart_IsolateFlags* flags,
void* callback_data,
char** error) {
// The VM should never call the isolate helper with a nullptr flags.
ASSERT(flags != nullptr);
ASSERT(flags->version == DART_FLAGS_CURRENT_VERSION);
ASSERT(package_root == nullptr);
if (error != nullptr) {
*error = nullptr;
}
bool dontneed_safe = true;
#if defined(DART_HOST_OS_LINUX)
// This would also be true in Linux, except that Google3 overrides the default
// ELF interpreter to one that apparently doesn't create proper mappings.
dontneed_safe = false;
#elif defined(DEBUG)
// If the snapshot isn't file-backed, madvise(DONT_NEED) is destructive.
if (Options::force_load_from_memory()) {
dontneed_safe = false;
}
#endif
flags->snapshot_is_dontneed_safe = dontneed_safe;
int exit_code = 0;
#if !defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
if (strcmp(script_uri, DART_KERNEL_ISOLATE_NAME) == 0) {
return CreateAndSetupKernelIsolate(script_uri, package_config, flags, error,
&exit_code);
}
#endif // !defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
if (strcmp(script_uri, DART_VM_SERVICE_ISOLATE_NAME) == 0) {
return CreateAndSetupServiceIsolate(script_uri, package_config, flags,
error, &exit_code);
}
bool is_main_isolate = false;
auto asset_resolution_base = FindAssetResolutionBase(script_uri, error);
if (*error != nullptr) {
return nullptr;
}
return CreateIsolateGroupAndSetupHelper(
is_main_isolate, script_uri, asset_resolution_base.get(), main,
package_config, flags, callback_data, error, &exit_code);
}
static void OnIsolateShutdown(void* isolate_group_data, void* isolate_data) {
Dart_EnterScope();
Dart_Handle sticky_error = Dart_GetStickyError();
if (!Dart_IsNull(sticky_error) && !Dart_IsFatalError(sticky_error)) {
Syslog::PrintErr("%s\n", Dart_GetError(sticky_error));
}
Dart_ExitScope();
}
static void DeleteIsolateData(void* isolate_group_data, void* callback_data) {
auto isolate_data = reinterpret_cast<IsolateData*>(callback_data);
delete isolate_data;
}
static void DeleteIsolateGroupData(void* callback_data) {
auto isolate_group_data = reinterpret_cast<IsolateGroupData*>(callback_data);
delete isolate_group_data;
}
static constexpr const char* kStdoutStreamId = "Stdout";
static constexpr const char* kStderrStreamId = "Stderr";
static bool ServiceStreamListenCallback(const char* stream_id) {
if (strcmp(stream_id, kStdoutStreamId) == 0) {
SetCaptureStdout(true);
return true;
} else if (strcmp(stream_id, kStderrStreamId) == 0) {
SetCaptureStderr(true);
return true;
}
return false;
}
static void ServiceStreamCancelCallback(const char* stream_id) {
if (strcmp(stream_id, kStdoutStreamId) == 0) {
SetCaptureStdout(false);
} else if (strcmp(stream_id, kStderrStreamId) == 0) {
SetCaptureStderr(false);
}
}
static bool FileModifiedCallback(const char* url, int64_t since) {
auto path = File::UriToPath(url);
if (path == nullptr) {
// If it isn't a file on local disk, we don't know if it has been
// modified.
return true;
}
int64_t data[File::kStatSize];
File::Stat(nullptr, path.get(), data);
if (data[File::kType] == File::kDoesNotExist) {
return true;
}
return data[File::kModifiedTime] > since;
}
static void EmbedderInformationCallback(Dart_EmbedderInformation* info) {
info->version = DART_EMBEDDER_INFORMATION_CURRENT_VERSION;
info->name = "Dart VM";
Process::GetRSSInformation(&(info->max_rss), &(info->current_rss));
}
#define CHECK_RESULT(result) \
if (Dart_IsError(result)) { \
const int exit_code = Dart_IsCompilationError(result) \
? kCompilationErrorExitCode \
: kErrorExitCode; \
ErrorExit(exit_code, "%s\n", Dart_GetError(result)); \
}
static void CompileAndSaveKernel(const char* script_name,
const char* package_config_override,
CommandLineOptions* dart_options) {
if (vm_run_app_snapshot) {
Syslog::PrintErr("Cannot create a script snapshot from an app snapshot.\n");
// The snapshot would contain references to the app snapshot instead of
// the core snapshot.
Platform::Exit(kErrorExitCode);
}
Snapshot::GenerateKernel(Options::snapshot_filename(), script_name,
package_config_override);
WriteDepsFile();
}
void RunMainIsolate(const char* script_name,
const char* asset_resolution_base,
const char* package_config_override,
CommandLineOptions* dart_options) {
if (script_name != nullptr) {
const char* base_name = strrchr(script_name, '/');
if (base_name == nullptr) {
base_name = script_name;
} else {
base_name++; // Skip '/'.
}
const intptr_t kMaxNameLength = 64;
char name[kMaxNameLength];
Utils::SNPrint(name, kMaxNameLength, "dart:%s", base_name);
Platform::SetProcessName(name);
}
// Call CreateIsolateGroupAndSetup which creates an isolate and loads up
// the specified application script.
char* error = nullptr;
int exit_code = 0;
Dart_IsolateFlags flags;
Dart_IsolateFlagsInitialize(&flags);
flags.is_system_isolate = Options::mark_main_isolate_as_system_isolate();
bool dontneed_safe = true;
#if defined(DART_HOST_OS_LINUX)
// This would also be true in Linux, except that Google3 overrides the default
// ELF interpreter to one that apparently doesn't create proper mappings.
dontneed_safe = false;
#elif defined(DEBUG)
// If the snapshot isn't file-backed, madvise(DONT_NEED) is destructive.
if (Options::force_load_from_memory()) {
dontneed_safe = false;
}
#endif
flags.snapshot_is_dontneed_safe = dontneed_safe;
if (!Options::load_module_snapshots().is_empty()) {
flags.modular_aot_mode = true;
}
Dart_Isolate isolate = CreateIsolateGroupAndSetupHelper(
/* is_main_isolate */ true, script_name, asset_resolution_base, "main",
Options::packages_file() == nullptr ? package_config_override
: Options::packages_file(),
&flags, nullptr /* callback_data */, &error, &exit_code);
if (isolate == nullptr) {
Syslog::PrintErr("%s\n", error);
free(error);
error = nullptr;
Process::TerminateExitCodeHandler();
error = Dart_Cleanup();
if (error != nullptr) {
Syslog::PrintErr("VM cleanup failed: %s\n", error);
free(error);
}
dart::embedder::Cleanup();
Platform::Exit((exit_code != 0) ? exit_code : kErrorExitCode);
}
main_isolate = isolate;
Dart_EnterIsolate(isolate);
ASSERT(isolate == Dart_CurrentIsolate());
ASSERT(isolate != nullptr);
Dart_Handle result;
Dart_EnterScope();
// Kernel snapshots should have been handled before reaching this point.
ASSERT(Options::gen_snapshot_kind() != kKernel);
// Lookup the library of the root script.
Dart_Handle root_lib = Dart_RootLibrary();
#if !defined(DART_PRECOMPILED_RUNTIME)
if (Options::compile_all()) {
result = Dart_CompileAll();
CHECK_RESULT(result);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
if (Dart_IsNull(root_lib)) {
ErrorExit(kErrorExitCode, "Unable to find root library for '%s'\n",
script_name);
}
// Create a closure for the main entry point which is in the exported
// namespace of the root library or invoke a getter of the same name
// in the exported namespace and return the resulting closure.
Dart_Handle main_closure =
Dart_GetField(root_lib, Dart_NewStringFromCString("main"));
CHECK_RESULT(main_closure);
if (!Dart_IsClosure(main_closure)) {
ErrorExit(kErrorExitCode, "Unable to find 'main' in root library '%s'\n",
script_name);
}
// Call _startIsolate in the isolate library to enable dispatching the
// initial startup message.
const intptr_t kNumIsolateArgs = 2;
Dart_Handle isolate_args[kNumIsolateArgs];
isolate_args[0] = main_closure; // entryPoint
isolate_args[1] = dart_options->CreateRuntimeOptions(); // args
Dart_Handle isolate_lib =
Dart_LookupLibrary(Dart_NewStringFromCString("dart:isolate"));
result =
Dart_Invoke(isolate_lib, Dart_NewStringFromCString("_startMainIsolate"),
kNumIsolateArgs, isolate_args);
CHECK_RESULT(result);
// Keep handling messages until the last active receive port is closed.
result = Dart_RunLoop();
// Generate an app snapshot after execution if specified.
if (Options::gen_snapshot_kind() == kAppJIT) {
if (!Dart_IsCompilationError(result)) {
Snapshot::GenerateAppJIT(Options::snapshot_filename());
}
}
CHECK_RESULT(result);
WriteDepsFile();
Dart_ExitScope();
// Shutdown the isolate.
Dart_ShutdownIsolate();
}
#undef CHECK_RESULT
static bool CheckForInvalidPath(const char* path) {
// TODO(zichangguo): "\\?\" is a prefix for paths on Windows.
// Arguments passed are parsed as an URI. "\\?\" causes problems as a part
// of URIs. This is a temporary workaround to prevent VM from crashing.
// Issue: https://github.com/dart-lang/sdk/issues/42779
if (strncmp(path, "\\\\?\\", 4) == 0) {
Syslog::PrintErr("\\\\?\\ prefix is not supported");
return false;
}
return true;
}
void main(int argc, char** argv) {
#if !defined(DART_HOST_OS_WINDOWS)
// Very early so any crashes during startup can also be symbolized.
EXEUtils::LoadDartProfilerSymbols(argv[0]);
#endif
char* script_name = nullptr;
CStringUniquePtr asset_resolution_base = CStringUniquePtr();
char* package_config_override = nullptr;
const int EXTRA_VM_ARGUMENTS = 10;
CommandLineOptions vm_options(argc + EXTRA_VM_ARGUMENTS);
CommandLineOptions dart_options(argc + EXTRA_VM_ARGUMENTS);
bool print_flags_seen = false;
// Perform platform specific initialization.
if (!Platform::Initialize()) {
Syslog::PrintErr("Initialization failed\n");
Platform::Exit(kErrorExitCode);
}
// Save the console state so we can restore it at shutdown.
Console::SaveConfig();
SetupICU();
// On Windows, the argv strings are code page encoded and not
// utf8. We need to convert them to utf8.
bool argv_converted = ShellUtils::GetUtf8Argv(argc, argv);
#if !defined(DART_PRECOMPILED_RUNTIME)
// Processing of some command line flags directly manipulates dfe.
Options::set_dfe(&dfe);
#endif // !defined(DART_PRECOMPILED_RUNTIME)
// When running from the command line we assume that we are optimizing for
// throughput, and therefore use a larger new gen semi space size and a faster
// new gen growth factor unless others have been specified.
if (kWordSize <= 4) {
vm_options.AddArgument("--new_gen_semi_max_size=16");
} else {
vm_options.AddArgument("--new_gen_semi_max_size=32");
}
vm_options.AddArgument("--new_gen_growth_factor=4");
auto parse_arguments =
[&](int argc, char** argv, CommandLineOptions* vm_options,
CommandLineOptions* dart_options, bool parsing_dart_vm_options) {
bool success = Options::ParseArguments(
argc, argv, vm_run_app_snapshot, parsing_dart_vm_options,
vm_options, &script_name, dart_options, &print_flags_seen);
if (!success) {
if (Options::help_option()) {
Options::PrintUsage();
Platform::Exit(0);
} else if (Options::version_option()) {
Options::PrintVersion();
Platform::Exit(0);
} else if (print_flags_seen) {
// Will set the VM flags, print them out and then we exit as no
// script was specified on the command line.
char* error =
Dart_SetVMFlags(vm_options->count(), vm_options->arguments());
if (error != nullptr) {
Syslog::PrintErr("Setting VM flags failed: %s\n", error);
free(error);
Platform::Exit(kErrorExitCode);
}
Platform::Exit(0);
} else {
Options::PrintUsage();
Platform::Exit(kErrorExitCode);
}
}
};
AppSnapshot* app_snapshot = nullptr;
#if defined(DART_PRECOMPILED_RUNTIME)
CStringUniquePtr cli_snapshot_path;
// If the executable binary contains the runtime together with an appended
// snapshot, load and run that.
// Any arguments passed to such an executable are meant for the actual
// application so skip all Dart VM flag parsing.
const size_t kPathBufSize = PATH_MAX + 1;
char executable_path[kPathBufSize];
if (Platform::ResolveExecutablePathInto(executable_path, kPathBufSize) > 0) {
auto prepare_app_snapshot = [&]() {
char* error = nullptr;
asset_resolution_base = ResolveSymlinks(executable_path, &error);
if (error != nullptr) {
Syslog::PrintErr("%s", error);
free(error);
delete app_snapshot;
Platform::Exit(kErrorExitCode);
}
Platform::SetExecutableName(argv[0]);
for (int i = 1; i < argc; i++) {
dart_options.AddArgument(argv[i]);
}
int env_argc = 0;
char** env_argv = Options::GetEnvArguments(argv[0], &env_argc);
if (env_argv != nullptr) {
// Discard Dart options produced while parsing DART_VM_OPTIONS.
CommandLineOptions tmp_options(env_argc + EXTRA_VM_ARGUMENTS);
vm_options.EnsureCapacity(env_argc + EXTRA_VM_ARGUMENTS);
parse_arguments(env_argc, env_argv, &vm_options, &tmp_options,
/*parsing_dart_vm_options=*/true);
}
};
app_snapshot = Snapshot::TryReadAppendedAppSnapshot(executable_path);
if (app_snapshot != nullptr) {
script_name = argv[0];
prepare_app_snapshot();
}
#if defined(DART_CLI_RUNTIME) && defined(DART_HOST_OS_LINUX)
if (app_snapshot == nullptr) {
cli_snapshot_path = ResolveCliSnapshotPath(executable_path, argv[0]);
script_name = cli_snapshot_path.get();
if (script_name != nullptr) {
prepare_app_snapshot();
}
}
#endif // defined(DART_CLI_RUNTIME) && defined(DART_HOST_OS_LINUX)
}
#endif
// Parse command line arguments.
if (app_snapshot == nullptr && script_name == nullptr) {
parse_arguments(argc, argv, &vm_options, &dart_options,
/*parsing_dart_vm_options=*/false);
}
DartUtils::SetEnvironment(Options::environment());
if (Options::suppress_core_dump()) {
Platform::SetCoreDumpResourceLimit(0);
} else {
InitializeCrashpadClient();
}
Loader::InitOnce();
const bool modular_aot = !Options::load_module_snapshots().is_empty();
auto try_load_snapshots_lambda = [&](void) -> void {
if (app_snapshot == nullptr) {
// For testing purposes we add a flag to debug-mode to use the
// in-memory ELF loader.
const bool force_load_from_memory =
false DEBUG_ONLY(|| Options::force_load_from_memory());
app_snapshot =
Snapshot::TryReadAppSnapshot(script_name, force_load_from_memory);
}
if (app_snapshot != nullptr && app_snapshot->IsJITorAOT()) {
if (app_snapshot->IsAOT() && !Dart_IsPrecompiledRuntime() &&
!modular_aot) {
Syslog::PrintErr(
"%s is an AOT snapshot and should be run with 'dartaotruntime'\n",
script_name);
Platform::Exit(kErrorExitCode);
}
if (app_snapshot->IsJIT() && Dart_IsPrecompiledRuntime()) {
Syslog::PrintErr(
"%s is a JIT snapshot, it cannot be run with 'dartaotruntime'\n",
script_name);
Platform::Exit(kErrorExitCode);
}
vm_run_app_snapshot = true;
app_snapshot->SetBuffers(&app_snapshot_data, &app_snapshot_text);
} else if (app_snapshot == nullptr && Dart_IsPrecompiledRuntime()) {
Syslog::PrintErr(
"%s is not an AOT snapshot,"
" it cannot be run with 'dartaotruntime'\n",
script_name);
Platform::Exit(kErrorExitCode);
}
};
// At this point, script_name now points to a script or a valid file path
// was provided as the first non-flag argument.
if (script_name != nullptr) {
if (!CheckForInvalidPath(script_name)) {
Platform::Exit(0);
}
try_load_snapshots_lambda();
}
#if defined(DART_PRECOMPILED_RUNTIME)
vm_options.AddArgument("--precompilation");
#endif
if (modular_aot) {
vm_options.AddArgument("--modular_aot");
}
if (Options::gen_snapshot_kind() == kAppJIT) {
// App-jit snapshot can be deployed to another machine,
// so generated code should not depend on the CPU features
// of the system where snapshot was generated.
vm_options.AddArgument("--target-unknown-cpu");
#if !defined(TARGET_ARCH_IA32)
vm_options.AddArgument("--link_natives_lazily");
#endif
}
// --delete_temp_dir_on_shutdown would otherwise point into argv, whose
// strings main() frees before returning. Own a copy instead, kept for the
// lifetime of the process.
if (Options::delete_temp_dir_on_shutdown() != nullptr) {
Options::set_delete_temp_dir_on_shutdown(
Utils::StrDup(Options::delete_temp_dir_on_shutdown()));
}
// If we need to write an app-jit snapshot, a depfile, or delete a temp dir,
// then add an exit hook.
if ((Options::gen_snapshot_kind() == kAppJIT) ||
(Options::depfile() != nullptr) ||
(Options::delete_temp_dir_on_shutdown() != nullptr)) {
Process::SetExitHook(OnExitHook);
}
char* error = nullptr;
if (!dart::embedder::InitOnce(&error)) {
Syslog::PrintErr("Standalone embedder initialization failed: %s\n", error);
free(error);
Platform::Exit(kErrorExitCode);
}
error = Dart_SetVMFlags(vm_options.count(), vm_options.arguments());
if (error != nullptr) {
Syslog::PrintErr("Setting VM flags failed: %s\n", error);
free(error);
Platform::Exit(kErrorExitCode);
}
// Note: must read platform only *after* VM flags are parsed because
// they might affect how the platform is loaded.
#if !defined(DART_PRECOMPILED_RUNTIME)
// Load vm_platform.dill for dart:* source support.
dfe.Init();
dfe.set_verbosity(Options::verbosity_level());
if (script_name != nullptr) {
uint8_t* application_kernel_buffer = nullptr;
intptr_t application_kernel_buffer_size = 0;
dfe.ReadScript(script_name, app_snapshot, &application_kernel_buffer,
&application_kernel_buffer_size);
if (application_kernel_buffer != nullptr) {
// Since we loaded the script anyway, save it.
dfe.set_application_kernel_buffer(application_kernel_buffer,
application_kernel_buffer_size);
Options::dfe()->set_use_dfe();
}
}
#endif
// Initialize the Dart VM.
Dart_InitializeParams init_params;
memset(&init_params, 0, sizeof(init_params));
init_params.version = DART_INITIALIZE_PARAMS_CURRENT_VERSION;
init_params.create_group = CreateIsolateGroupAndSetup;
init_params.initialize_isolate = OnIsolateInitialize;
init_params.shutdown_isolate = OnIsolateShutdown;
init_params.cleanup_isolate = DeleteIsolateData;
init_params.cleanup_group = DeleteIsolateGroupData;
init_params.file_open = DartUtils::OpenFile;
init_params.file_read = DartUtils::ReadFile;
init_params.file_write = DartUtils::WriteFile;
init_params.file_close = DartUtils::CloseFile;
init_params.entropy_source = DartUtils::EntropySource;
#if !defined(DART_PRECOMPILED_RUNTIME)
init_params.start_kernel_isolate =
dfe.UseDartFrontend() && dfe.CanUseDartFrontend();
#else
init_params.start_kernel_isolate = false;
#endif
error = Dart_Initialize(&init_params);
if (error != nullptr) {
dart::embedder::Cleanup();
Syslog::PrintErr("VM initialization failed: %s\n", error);
free(error);
Platform::Exit(kErrorExitCode);
}
Dart_SetServiceStreamCallbacks(&ServiceStreamListenCallback,
&ServiceStreamCancelCallback);
Dart_SetFileModifiedCallback(&FileModifiedCallback);
Dart_SetEmbedderInformationCallback(&EmbedderInformationCallback);
bool should_run_user_program = true;
#if !defined(DART_PRECOMPILED_RUNTIME)
if (script_name == nullptr &&
Options::gen_snapshot_kind() != SnapshotKind::kNone) {
Syslog::PrintErr(
"Snapshot generation should be done using the 'dart compile' "
"command.\n");
Platform::Exit(kErrorExitCode);
}
if (!Options::resident() &&
(Options::resident_compiler_info_file_path() != nullptr ||
Options::resident_server_info_file_path() != nullptr)) {
Syslog::PrintErr(
"Error: the --resident flag must be passed whenever the "
"--resident-compiler-info-file option is passed.\n");
Platform::Exit(kErrorExitCode);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
if (should_run_user_program) {
if (asset_resolution_base.get() == nullptr) {
asset_resolution_base = ResolveSymlinks(script_name, &error);
if (error != nullptr) {
Syslog::PrintErr("%s", error);
free(error);
delete app_snapshot;
Platform::Exit(kErrorExitCode);
}
}
if (Options::gen_snapshot_kind() == kKernel) {
CompileAndSaveKernel(script_name, package_config_override, &dart_options);
} else {
// Run the main isolate until we aren't told to restart.
RunMainIsolate(script_name, asset_resolution_base.get(),
package_config_override, &dart_options);
}
}
error = Dart_Cleanup();
if (error != nullptr) {
Syslog::PrintErr("VM cleanup failed: %s\n", error);
free(error);
}
// Terminate process exit-code handler.
Process::TerminateExitCodeHandler();
const intptr_t global_exit_code = Process::GlobalExitCode();
dart::embedder::Cleanup();
delete app_snapshot;
free(app_script_uri);
asset_resolution_base.reset();
DeleteTempDirOnShutdown();
// Free copied argument strings if converted.
if (argv_converted) {
for (int i = 0; i < argc; i++) {
free(argv[i]);
}
}
// Free environment if any.
Options::Cleanup();
Platform::Exit(global_exit_code);
}
} // namespace bin
} // namespace dart