/
main.cc
1445 lines (1299 loc) · 54.7 KB
/
main.cc
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// 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory>
#include "bin/builtin.h"
#include "bin/console.h"
#include "bin/crashpad.h"
#include "bin/dartdev_isolate.h"
#include "bin/dartutils.h"
#include "bin/dfe.h"
#include "bin/error_exit.h"
#include "bin/eventhandler.h"
#include "bin/file.h"
#include "bin/gzip.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/thread.h"
#include "bin/utils.h"
#include "bin/vmservice_impl.h"
#include "include/bin/dart_io_api.h"
#include "include/dart_api.h"
#include "include/dart_embedder_api.h"
#include "include/dart_tools_api.h"
#include "platform/globals.h"
#include "platform/growable_array.h"
#include "platform/hashmap.h"
#include "platform/syslog.h"
#include "platform/text_buffer.h"
#include "platform/utils.h"
extern "C" {
extern const uint8_t kDartVmSnapshotData[];
extern const uint8_t kDartVmSnapshotInstructions[];
extern const uint8_t kDartCoreIsolateSnapshotData[];
extern const uint8_t kDartCoreIsolateSnapshotInstructions[];
}
namespace dart {
namespace bin {
// Snapshot pieces we link in a snapshot.
const uint8_t* vm_snapshot_data = kDartVmSnapshotData;
const uint8_t* vm_snapshot_instructions = kDartVmSnapshotInstructions;
const uint8_t* core_isolate_snapshot_data = kDartCoreIsolateSnapshotData;
const uint8_t* core_isolate_snapshot_instructions =
kDartCoreIsolateSnapshotInstructions;
/**
* 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 = NULL;
static const uint8_t* app_isolate_snapshot_data = NULL;
static const uint8_t* app_isolate_snapshot_instructions = NULL;
static bool kernel_isolate_is_running = false;
static Dart_Isolate main_isolate = NULL;
#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 NULL;
#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() == NULL) {
return;
}
File* file = File::Open(NULL, Options::depfile(), File::kWriteTruncate);
if (file == NULL) {
ErrorExit(kErrorExitCode, "Error: Unable to open snapshot depfile: %s\n\n",
Options::depfile());
}
bool success = true;
if (Options::depfile_output_filename() != NULL) {
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 OnExitHook(int64_t exit_code) {
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,
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.
result = DartUtils::PrepareForScriptLoading(false, Options::trace_loading());
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.
Builtin::SetNativeResolver(Builtin::kBuiltinLibrary);
Builtin::SetNativeResolver(Builtin::kIOLibrary);
Builtin::SetNativeResolver(Builtin::kCLILibrary);
VmService::SetNativeResolver();
const char* namespc =
Dart_IsKernelIsolate(isolate) ? NULL : Options::namespc();
result =
DartUtils::SetupIOLibrary(namespc, script_uri, Options::exit_disabled());
if (Dart_IsError(result)) return result;
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,
/*group_start=*/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 = NULL;
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 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));
const char* resolved_packages_config = nullptr;
result = SetupCoreLibraries(isolate, isolate_data,
/*is_isolate_group_start=*/true,
&resolved_packages_config);
CHECK_RESULT(result);
#if !defined(DART_PRECOMPILED_RUNTIME)
auto isolate_group_data = isolate_data->isolate_group_data();
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 && kernel_buffer == NULL &&
!Dart_IsKernelIsolate(isolate)) {
if (!dfe.CanUseDartFrontend()) {
const char* format = "Dart frontend unavailable to compile script %s.";
intptr_t len = snprintf(NULL, 0, format, script_uri) + 1;
*error = reinterpret_cast<char*>(malloc(len));
ASSERT(error != NULL);
snprintf(*error, len, format, script_uri);
*exit_code = kErrorExitCode;
Dart_ExitScope();
Dart_ShutdownIsolate();
return NULL;
}
uint8_t* application_kernel_buffer = NULL;
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 snapshot = Options::gen_snapshot_kind() == kAppJIT;
dfe.CompileAndReadScript(script_uri, &application_kernel_buffer,
&application_kernel_buffer_size, error, exit_code,
resolved_packages_config, snapshot);
if (application_kernel_buffer == NULL) {
Dart_ExitScope();
Dart_ShutdownIsolate();
return NULL;
}
isolate_group_data->SetKernelBufferNewlyOwned(
application_kernel_buffer, application_kernel_buffer_size);
kernel_buffer = application_kernel_buffer;
kernel_buffer_size = application_kernel_buffer_size;
}
if (kernel_buffer != NULL) {
Dart_Handle uri = Dart_NewStringFromCString(script_uri);
CHECK_RESULT(uri);
Dart_Handle resolved_script_uri = DartUtils::ResolveScript(uri);
CHECK_RESULT(resolved_script_uri);
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 = NULL;
result = Dart_StringToCString(
DartUtils::ResolveScript(Dart_NewStringFromCString(script_uri)),
&resolved_script_uri);
CHECK_RESULT(result);
ASSERT(app_script_uri == NULL);
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 != NULL) {
// 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 = NULL;
result = Dart_StringToCString(uri, &resolved_script_uri);
CHECK_RESULT(result);
result = Loader::InitForSnapshot(resolved_script_uri, isolate_data);
CHECK_RESULT(result);
}
Dart_TimelineEvent("LoadScript", Dart_TimelineGetMicros(),
Dart_GetMainPortId(), Dart_Timeline_Event_Async_End, 0,
NULL, NULL);
#else
UNREACHABLE();
#endif // !defined(DART_PRECOMPILED_RUNTIME)
}
if ((Options::gen_snapshot_kind() == kAppJIT) && is_main_isolate) {
result = Dart_SortClasses();
CHECK_RESULT(result);
}
// Disable pausing the DartDev isolate on start and exit.
const char* isolate_name = nullptr;
result = Dart_StringToCString(Dart_DebugName(), &isolate_name);
CHECK_RESULT(result);
#if !defined(DART_PRECOMPILED_RUNTIME)
if (strstr(isolate_name, DART_DEV_ISOLATE_NAME) != nullptr) {
Dart_SetShouldPauseOnStart(false);
Dart_SetShouldPauseOnExit(false);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
// Make the isolate runnable so that it is ready to handle messages.
Dart_ExitScope();
Dart_ExitIsolate();
*error = Dart_IsolateMakeRunnable(isolate);
if (*error != NULL) {
Dart_EnterIsolate(isolate);
Dart_ShutdownIsolate();
return NULL;
}
return isolate;
}
#if !defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
// Returns newly created Kernel Isolate on success, NULL 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 = NULL;
intptr_t kernel_buffer_size = 0;
dfe.application_kernel_buffer(&kernel_buffer, &kernel_buffer_size);
if (kernel_buffer_size != 0) {
return NULL;
}
}
// Create and Start the kernel isolate.
const char* kernel_snapshot_uri = dfe.frontend_filename();
const char* uri =
kernel_snapshot_uri != NULL ? kernel_snapshot_uri : script_uri;
if (packages_config == NULL) {
packages_config = Options::packages_file();
}
Dart_Isolate isolate = NULL;
IsolateGroupData* isolate_group_data = nullptr;
IsolateData* isolate_data = nullptr;
bool isolate_run_app_snapshot = false;
AppSnapshot* app_snapshot = NULL;
// Kernel isolate uses an app snapshot or uses the dill file.
if ((kernel_snapshot_uri != NULL) &&
(app_snapshot = Snapshot::TryReadAppSnapshot(
kernel_snapshot_uri, /*force_load_elf_from_memory=*/false,
/*decode_uri=*/false)) != nullptr) {
const uint8_t* isolate_snapshot_data = NULL;
const uint8_t* isolate_snapshot_instructions = NULL;
const uint8_t* ignore_vm_snapshot_data;
const uint8_t* ignore_vm_snapshot_instructions;
isolate_run_app_snapshot = true;
app_snapshot->SetBuffers(
&ignore_vm_snapshot_data, &ignore_vm_snapshot_instructions,
&isolate_snapshot_data, &isolate_snapshot_instructions);
isolate_group_data = new IsolateGroupData(
uri, 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,
isolate_snapshot_data, isolate_snapshot_instructions, flags,
isolate_group_data, isolate_data, error);
}
if (isolate == NULL) {
// Clear error from app snapshot and re-trying from kernel file.
free(*error);
*error = NULL;
delete isolate_data;
delete isolate_group_data;
const uint8_t* kernel_service_buffer = NULL;
intptr_t kernel_service_buffer_size = 0;
dfe.LoadKernelService(&kernel_service_buffer, &kernel_service_buffer_size);
ASSERT(kernel_service_buffer != NULL);
isolate_group_data = new IsolateGroupData(uri, 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 == NULL) {
Syslog::PrintErr("%s\n", *error);
delete isolate_data;
delete isolate_group_data;
return NULL;
}
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, NULL on failure.
// For now we only support the service isolate coming up from sources
// which are compiled by the VM parser.
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, packages_config, nullptr, false);
ASSERT(flags != nullptr);
#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.
const uint8_t* isolate_snapshot_data = app_isolate_snapshot_data;
const uint8_t* isolate_snapshot_instructions =
app_isolate_snapshot_instructions;
flags->null_safety =
Dart_DetectNullSafety(nullptr, nullptr, nullptr, isolate_snapshot_data,
isolate_snapshot_instructions, nullptr, -1);
isolate = Dart_CreateIsolateGroup(
script_uri, DART_VM_SERVICE_ISOLATE_NAME, isolate_snapshot_data,
isolate_snapshot_instructions, flags, isolate_group_data,
/*isolate_data=*/nullptr, error);
#else
// JIT: Service isolate uses the core libraries snapshot.
// Set flag to load and retain the vmservice library.
flags->load_vmservice_library = true;
const uint8_t* isolate_snapshot_data = core_isolate_snapshot_data;
const uint8_t* isolate_snapshot_instructions =
core_isolate_snapshot_instructions;
isolate = Dart_CreateIsolateGroup(
script_uri, DART_VM_SERVICE_ISOLATE_NAME, isolate_snapshot_data,
isolate_snapshot_instructions, flags, isolate_group_data,
/*isolate_data=*/nullptr, error);
#endif // !defined(DART_PRECOMPILED_RUNTIME)
if (isolate == NULL) {
delete isolate_group_data;
return NULL;
}
Dart_EnterScope();
Dart_Handle result = Dart_SetLibraryTagHandler(Loader::LibraryTagHandler);
CHECK_RESULT(result);
result = Dart_SetDeferredLoadHandler(Loader::DeferredLoadHandler);
CHECK_RESULT(result);
int vm_service_server_port = INVALID_VM_SERVICE_SERVER_PORT;
if (Options::disable_dart_dev() || Options::disable_dds()) {
vm_service_server_port = Options::vm_service_server_port();
} else if (Options::vm_service_server_port() !=
INVALID_VM_SERVICE_SERVER_PORT) {
vm_service_server_port = 0;
}
// We do not want to wait for DDS to advertise availability of VM service in
// the following scenarios:
// - The DartDev CLI is disabled (CLI isolate starts DDS) and VM service is
// enabled.
// - DDS is disabled.
// TODO(bkonyi): do we want to tie DevTools / DDS to the CLI in the long run?
bool wait_for_dds_to_advertise_service =
!(Options::disable_dart_dev() || Options::disable_dds());
// Load embedder specific bits and return.
if (!VmService::Setup(
!wait_for_dds_to_advertise_service ? Options::vm_service_server_ip()
: DEFAULT_VM_SERVICE_SERVER_IP,
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, !Options::disable_observatory())) {
*error = Utils::StrDup(VmService::GetErrorMessage());
return NULL;
}
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 NULL;
#endif // !defined(PRODUCT)
}
#if !defined(DART_PRECOMPILED_RUNTIME)
static Dart_Isolate CreateAndSetupDartDevIsolate(const char* script_uri,
const char* packages_config,
Dart_IsolateFlags* flags,
char** error,
int* exit_code) {
int64_t start = Dart_TimelineGetMicros();
auto dartdev_path = DartDevIsolate::TryResolveDartDevSnapshotPath();
Dart_Isolate isolate = nullptr;
const uint8_t* isolate_snapshot_data = core_isolate_snapshot_data;
const uint8_t* isolate_snapshot_instructions =
core_isolate_snapshot_instructions;
IsolateGroupData* isolate_group_data = nullptr;
IsolateData* isolate_data = nullptr;
if (error != nullptr) {
*error = nullptr;
}
AppSnapshot* app_snapshot = nullptr;
bool isolate_run_app_snapshot = true;
if (dartdev_path.get() != nullptr &&
(app_snapshot = Snapshot::TryReadAppSnapshot(
dartdev_path.get(), /*force_load_elf_from_memory=*/false,
/*decode_uri=*/false)) != nullptr) {
const uint8_t* isolate_snapshot_data = NULL;
const uint8_t* isolate_snapshot_instructions = NULL;
const uint8_t* ignore_vm_snapshot_data;
const uint8_t* ignore_vm_snapshot_instructions;
app_snapshot->SetBuffers(
&ignore_vm_snapshot_data, &ignore_vm_snapshot_instructions,
&isolate_snapshot_data, &isolate_snapshot_instructions);
isolate_group_data =
new IsolateGroupData(DART_DEV_ISOLATE_NAME, packages_config,
app_snapshot, isolate_run_app_snapshot);
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroup(
DART_DEV_ISOLATE_NAME, DART_DEV_ISOLATE_NAME, isolate_snapshot_data,
isolate_snapshot_instructions, flags, isolate_group_data, isolate_data,
error);
}
if (isolate == nullptr) {
isolate_run_app_snapshot = false;
dartdev_path = DartDevIsolate::TryResolveDartDevKernelPath();
// Clear error from app snapshot and retry from kernel.
if (error != nullptr && *error != nullptr) {
free(*error);
*error = nullptr;
}
if (app_snapshot != nullptr) {
delete app_snapshot;
}
if (dartdev_path.get() == nullptr) {
Syslog::PrintErr(
"Failed to start the Dart CLI isolate. Could not resolve DartDev "
"snapshot or kernel.\n");
delete isolate_data;
delete isolate_group_data;
return nullptr;
}
isolate_group_data =
new IsolateGroupData(DART_DEV_ISOLATE_NAME, packages_config, nullptr,
isolate_run_app_snapshot);
uint8_t* application_kernel_buffer = NULL;
intptr_t application_kernel_buffer_size = 0;
dfe.ReadScript(dartdev_path.get(), &application_kernel_buffer,
&application_kernel_buffer_size, /*decode_uri=*/false);
isolate_group_data->SetKernelBufferNewlyOwned(
application_kernel_buffer, application_kernel_buffer_size);
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroup(
DART_DEV_ISOLATE_NAME, DART_DEV_ISOLATE_NAME, isolate_snapshot_data,
isolate_snapshot_instructions, flags, isolate_group_data, isolate_data,
error);
}
Dart_Isolate created_isolate =
IsolateSetupHelper(isolate, false, DART_DEV_ISOLATE_NAME, packages_config,
isolate_run_app_snapshot, flags, error, exit_code);
int64_t end = Dart_TimelineGetMicros();
Dart_TimelineEvent("CreateAndSetupDartDevIsolate", start, end,
Dart_Timeline_Event_Duration, 0, NULL, NULL);
return created_isolate;
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
// Returns newly created Isolate on success, NULL on failure.
static Dart_Isolate CreateIsolateGroupAndSetupHelper(
bool is_main_isolate,
const char* script_uri,
const char* name,
const char* packages_config,
Dart_IsolateFlags* flags,
void* callback_data,
char** error,
int* exit_code,
bool force_no_sound_null_safety = false) {
int64_t start = Dart_TimelineGetMicros();
ASSERT(script_uri != NULL);
uint8_t* kernel_buffer = NULL;
std::shared_ptr<uint8_t> kernel_buffer_ptr;
intptr_t kernel_buffer_size = 0;
AppSnapshot* app_snapshot = NULL;
#if defined(DART_PRECOMPILED_RUNTIME)
const uint8_t* isolate_snapshot_data = nullptr;
const uint8_t* isolate_snapshot_instructions = nullptr;
if (is_main_isolate) {
isolate_snapshot_data = app_isolate_snapshot_data;
isolate_snapshot_instructions = app_isolate_snapshot_instructions;
} else {
// AOT: All isolates need to be run from AOT compiled snapshots.
const bool kForceLoadElfFromMemory = false;
app_snapshot =
Snapshot::TryReadAppSnapshot(script_uri, kForceLoadElfFromMemory);
if (app_snapshot == nullptr) {
*error = Utils::StrDup(
"The uri provided to `Isolate.spawnUri()` does not "
"contain a valid AOT snapshot.");
return nullptr;
}
const uint8_t* ignore_vm_snapshot_data;
const uint8_t* ignore_vm_snapshot_instructions;
app_snapshot->SetBuffers(
&ignore_vm_snapshot_data, &ignore_vm_snapshot_instructions,
&isolate_snapshot_data, &isolate_snapshot_instructions);
}
bool isolate_run_app_snapshot = true;
flags->null_safety =
Dart_DetectNullSafety(nullptr, nullptr, nullptr, isolate_snapshot_data,
isolate_snapshot_instructions, nullptr, -1);
#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* isolate_snapshot_data = core_isolate_snapshot_data;
const uint8_t* isolate_snapshot_instructions =
core_isolate_snapshot_instructions;
if ((app_isolate_snapshot_data != NULL) &&
(is_main_isolate || ((app_script_uri != NULL) &&
(strcmp(script_uri, app_script_uri) == 0)))) {
isolate_run_app_snapshot = true;
isolate_snapshot_data = app_isolate_snapshot_data;
isolate_snapshot_instructions = app_isolate_snapshot_instructions;
} else if (!is_main_isolate) {
app_snapshot = Snapshot::TryReadAppSnapshot(script_uri);
if (app_snapshot != NULL) {
isolate_run_app_snapshot = true;
const uint8_t* ignore_vm_snapshot_data;
const uint8_t* ignore_vm_snapshot_instructions;
app_snapshot->SetBuffers(
&ignore_vm_snapshot_data, &ignore_vm_snapshot_instructions,
&isolate_snapshot_data, &isolate_snapshot_instructions);
}
}
if (flags->copy_parent_code && callback_data != nullptr) {
auto parent_isolate_group_data =
reinterpret_cast<IsolateData*>(callback_data)->isolate_group_data();
kernel_buffer_ptr = parent_isolate_group_data->kernel_buffer();
kernel_buffer = kernel_buffer_ptr.get();
kernel_buffer_size = parent_isolate_group_data->kernel_buffer_size();
}
if (kernel_buffer == NULL && !isolate_run_app_snapshot) {
dfe.ReadScript(script_uri, &kernel_buffer, &kernel_buffer_size,
/*decode_uri=*/true, &kernel_buffer_ptr);
}
PathSanitizer script_uri_sanitizer(script_uri);
PathSanitizer packages_config_sanitizer(packages_config);
if (force_no_sound_null_safety) {
flags->null_safety = false;
} else {
flags->null_safety = Dart_DetectNullSafety(
script_uri_sanitizer.sanitized_uri(),
packages_config_sanitizer.sanitized_uri(),
DartUtils::original_working_directory, isolate_snapshot_data,
isolate_snapshot_instructions, kernel_buffer, kernel_buffer_size);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
auto isolate_group_data = new IsolateGroupData(
script_uri, packages_config, app_snapshot, isolate_run_app_snapshot);
if (kernel_buffer != NULL) {
if (kernel_buffer_ptr) {
isolate_group_data->SetKernelBufferAlreadyOwned(
std::move(kernel_buffer_ptr), kernel_buffer_size);
} else {
isolate_group_data->SetKernelBufferNewlyOwned(kernel_buffer,
kernel_buffer_size);
}
}
Dart_Isolate isolate = NULL;
IsolateData* isolate_data = nullptr;
#if !defined(DART_PRECOMPILED_RUNTIME)
if (!isolate_run_app_snapshot && (isolate_snapshot_data == NULL)) {
const uint8_t* platform_kernel_buffer = NULL;
intptr_t platform_kernel_buffer_size = 0;
dfe.LoadPlatform(&platform_kernel_buffer, &platform_kernel_buffer_size);
if (platform_kernel_buffer == NULL) {
platform_kernel_buffer = kernel_buffer;
platform_kernel_buffer_size = kernel_buffer_size;
}
if (platform_kernel_buffer == NULL) {
#if defined(EXCLUDE_CFE_AND_KERNEL_PLATFORM)
FATAL(
"Binary built with --exclude-kernel-service. Cannot run"
" from source.");
#else
FATAL("platform_program cannot be NULL.");
#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, isolate_snapshot_data,
isolate_snapshot_instructions, flags,
isolate_group_data, isolate_data, error);
}
#else
isolate_data = new IsolateData(isolate_group_data);
isolate = Dart_CreateIsolateGroup(script_uri, name, isolate_snapshot_data,
isolate_snapshot_instructions, flags,
isolate_group_data, isolate_data, error);
#endif // !defined(DART_PRECOMPILED_RUNTIME)
Dart_Isolate created_isolate = NULL;
if (isolate == NULL) {
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_TimelineEvent("CreateIsolateGroupAndSetupHelper", start, end,
Dart_Timeline_Event_Duration, 0, NULL, NULL);
return created_isolate;
}
#undef CHECK_RESULT
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 NULL flags.
ASSERT(flags != NULL);
ASSERT(flags->version == DART_FLAGS_CURRENT_VERSION);
ASSERT(package_root == 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_elf_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 !defined(DART_PRECOMPILED_RUNTIME)
if (strcmp(script_uri, DART_DEV_ISOLATE_NAME) == 0) {
return CreateAndSetupDartDevIsolate(script_uri, package_config, flags,
error, &exit_code);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
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;
return CreateIsolateGroupAndSetupHelper(is_main_isolate, script_uri, main,
package_config, flags, callback_data,
error, &exit_code);
}
#if !defined(DART_PRECOMPILED_RUNTIME)
static const char* RegisterKernelBlob(const uint8_t* kernel_buffer,
intptr_t kernel_buffer_size) {
return dfe.RegisterKernelBlob(kernel_buffer, kernel_buffer_size);
}
static void UnregisterKernelBlob(const char* kernel_blob_uri) {
dfe.UnregisterKernelBlob(kernel_blob_uri);
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
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 const char* kStdoutStreamId = "Stdout";
static 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) {
if (strncmp(url, "file:///", 8) != 0) {
// 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(NULL, url + 7, data);
if (data[File::kType] == File::kDoesNotExist) {
return true;
}
bool modified = data[File::kModifiedTime] > since;
return modified;
}
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* package_config_override,
bool force_no_sound_null_safety,
CommandLineOptions* dart_options) {
if (script_name != NULL) {
const char* base_name = strrchr(script_name, '/');
if (base_name == NULL) {
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