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# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build/compiled_action.gni")
import("//build/fuchsia/sdk.gni")
import("//flutter/build/bin_to_obj.gni")
import("//flutter/common/config.gni")
import("//flutter/impeller/tools/impeller.gni")
import("//flutter/lib/ui/dart_ui.gni")
import("$dart_src/utils/compile_platform.gni")
# Generates the Dart/Flutter core platform files and tools.
#
# This target generates the platform-specific snapshots and snapshot-related
# tooling for a given target CPU.
#
# Outputs:
# * Core platform compiled to kernel bytecode
# * Core platform compiled to target_cpu-specific binary snapshot
# * target_cpu-specific gen_snapshot
# * target_cpu-specific analyze_snapshot
group("generate_snapshot_bins") {
deps = [
":generate_snapshot_bin",
":kernel_platform_files",
]
# Build gen_snapshot for the currently specified target_cpu.
#
# For macOS target builds: needed for both target CPUs (arm64, x64).
# For iOS, Android target builds: all AOT target CPUs are arm/arm64.
if (host_os == "mac" && target_os == "mac") {
deps += [ ":create_macos_gen_snapshots" ]
} else if (host_os == "mac" &&
(target_cpu == "arm" || target_cpu == "arm64")) {
deps += [ ":create_arm_gen_snapshot" ]
}
# Build analyze_snapshot for 64-bit target CPUs.
if (host_os == "linux" && (target_cpu == "x64" || target_cpu == "arm64")) {
deps += [ "$dart_src/runtime/bin:analyze_snapshot($host_toolchain)" ]
}
}
# Compiles a binary snapshot of the core Dart/Flutter platform.
#
# Inputs:
# * platform_strong.dill
#
# Tools:
# * gen_snapshot
#
# Outputs:
# * vm_snapshot_data.bin
# * vm_snapshot_instructions.bin
# * isolate_snapshot_data.bin
# * isolate_snapshot_instructions.bin
#
# See: `bin_to_linkable` rules below that build these outputs into linkable form
# See: https://github.com/flutter/flutter/wiki/Flutter-engine-operation-in-AOT-Mode
compiled_action("generate_snapshot_bin") {
if (target_cpu == "x86" && host_os == "linux") {
# By default Dart will create a 32-bit gen_snapshot host binary if the target
# platform is 32-bit. Override this to create a 64-bit gen_snapshot for x86
# targets because some host platforms may not support 32-bit binaries.
tool = "$dart_src/runtime/bin:gen_snapshot_host_targeting_host"
toolchain = "//build/toolchain/$host_os:clang_x64"
} else {
tool = "$dart_src/runtime/bin:gen_snapshot"
}
platform_kernel = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
inputs = [ platform_kernel ]
deps = [ ":kernel_platform_files" ]
vm_snapshot_data = "$target_gen_dir/vm_isolate_snapshot.bin"
vm_snapshot_instructions = "$target_gen_dir/vm_snapshot_instructions.bin"
isolate_snapshot_data = "$target_gen_dir/isolate_snapshot.bin"
isolate_snapshot_instructions =
"$target_gen_dir/isolate_snapshot_instructions.bin"
outputs = [
vm_snapshot_data,
vm_snapshot_instructions,
isolate_snapshot_data,
isolate_snapshot_instructions,
]
args = [
"--snapshot_kind=core",
"--enable_mirrors=false",
"--vm_snapshot_data=" + rebase_path(vm_snapshot_data),
"--vm_snapshot_instructions=" + rebase_path(vm_snapshot_instructions),
"--isolate_snapshot_data=" + rebase_path(isolate_snapshot_data),
"--isolate_snapshot_instructions=" +
rebase_path(isolate_snapshot_instructions),
]
if (is_debug && flutter_runtime_mode != "profile" &&
flutter_runtime_mode != "release" &&
flutter_runtime_mode != "jit_release") {
args += [ "--enable_asserts" ]
}
args += [ rebase_path(platform_kernel) ]
metadata = {
entitlement_file_path = [ "gen_snapshot" ]
}
}
bin_to_linkable("vm_snapshot_data_linkable") {
deps = [ ":generate_snapshot_bin" ]
input = "$target_gen_dir/vm_isolate_snapshot.bin"
symbol = "kDartVmSnapshotData"
executable = false
}
bin_to_linkable("vm_snapshot_instructions_linkable") {
deps = [ ":generate_snapshot_bin" ]
input = "$target_gen_dir/vm_snapshot_instructions.bin"
symbol = "kDartVmSnapshotInstructions"
executable = true
}
bin_to_linkable("isolate_snapshot_data_linkable") {
deps = [ ":generate_snapshot_bin" ]
input = "$target_gen_dir/isolate_snapshot.bin"
symbol = "kDartIsolateSnapshotData"
executable = false
}
bin_to_linkable("isolate_snapshot_instructions_linkable") {
deps = [ ":generate_snapshot_bin" ]
input = "$target_gen_dir/isolate_snapshot_instructions.bin"
symbol = "kDartIsolateSnapshotInstructions"
executable = true
}
bin_to_linkable("platform_strong_dill_linkable") {
deps = [ ":kernel_platform_files" ]
input = "$root_out_dir/flutter_patched_sdk/platform_strong.dill"
symbol = "kPlatformStrongDill"
size_symbol = "kPlatformStrongDillSize"
executable = false
}
# Creates a `gen_snapshot` binary suffixed with the target CPU architecture.
#
# Builds gen_snapshot using the host toolchain then copies the resulting binary
# to `gen_snapshot_armv7` or `gen_snapshot_arm64` depending on the target
# platform.
#
# This target is used for builds targeting iOS/Android OS.
if (host_os == "mac" && target_os != "mac" &&
(target_cpu == "arm" || target_cpu == "arm64")) {
copy("create_arm_gen_snapshot") {
# The toolchain-specific output directory. For cross-compiles, this is a
# clang-x64 or clang-arm64 subdirectory of the top-level build directory.
host_output_dir =
get_label_info("$dart_src/runtime/bin:gen_snapshot($host_toolchain)",
"root_out_dir")
# Determine suffixed output gen_snapshot name.
target_cpu_suffix = target_cpu
if (target_cpu == "arm") {
target_cpu_suffix = "armv7"
}
sources = [ "${host_output_dir}/gen_snapshot" ]
outputs = [ "${host_output_dir}/gen_snapshot_${target_cpu_suffix}" ]
deps = [ "$dart_src/runtime/bin:gen_snapshot($host_toolchain)" ]
visibility = [ ":*" ]
}
}
# Creates a `gen_snapshot` binary suffixed with the target CPU architecture.
#
# Builds gen_snapshot using the host toolchain then copies the resulting binary
# to `gen_snapshot_arm64` or `gen_snapshot_x64` depending on the target
# platform.
#
# This target is used for builds targeting macOS.
if (host_os == "mac" && target_os == "mac") {
copy("create_macos_gen_snapshots") {
# The toolchain-specific output directory. For cross-compiles, this is a
# clang-x64 or clang-arm64 subdirectory of the top-level build directory.
host_output_dir =
get_label_info("$dart_src/runtime/bin:gen_snapshot($host_toolchain)",
"root_out_dir")
sources = [ "${host_output_dir}/gen_snapshot" ]
outputs = [ "${root_out_dir}/gen_snapshot_${target_cpu}" ]
deps = [ "$dart_src/runtime/bin:gen_snapshot($host_toolchain)" ]
}
}
source_set("snapshot") {
deps = [
":isolate_snapshot_data_linkable",
":isolate_snapshot_instructions_linkable",
":platform_strong_dill_linkable",
":vm_snapshot_data_linkable",
":vm_snapshot_instructions_linkable",
]
sources = get_target_outputs(":isolate_snapshot_data_linkable") +
get_target_outputs(":isolate_snapshot_instructions_linkable") +
get_target_outputs(":vm_snapshot_data_linkable") +
get_target_outputs(":vm_snapshot_instructions_linkable") +
get_target_outputs(":platform_strong_dill_linkable")
}
# Compiles the Dart/Flutter core libraries to kernel bytecode.
compile_platform("strong_platform") {
single_root_scheme = "org-dartlang-sdk"
single_root_base = rebase_path("../../../")
if (impeller_enable_3d) {
libraries_specification_uri =
"org-dartlang-sdk:///flutter/lib/snapshot/libraries_experimental.json"
} else {
libraries_specification_uri =
"org-dartlang-sdk:///flutter/lib/snapshot/libraries.json"
}
outputs = [
"$root_out_dir/flutter_patched_sdk/platform_strong.dill",
"$root_out_dir/flutter_patched_sdk/vm_outline_strong.dill",
]
pool = "//flutter/build/dart:dart_pool"
is_runtime_mode_release =
flutter_runtime_mode == "release" || flutter_runtime_mode == "jit_release"
args = [
"--enable-experiment=generic-metadata",
"--nnbd-agnostic",
"--target=flutter",
"-Ddart.vm.product=$is_runtime_mode_release",
"-Ddart.isVM=true",
"dart:core",
]
}
# Fuchsia's snapshot requires a different platform with extra dart: libraries.
group("kernel_platform_files") {
public_deps = [ ":strong_platform" ]
}