mirror of
https://github.com/dart-lang/sdk
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9e37c2b480
The purpose of the wasm_js_compatibility target is to facilitate experiments with a JS compatibility mode for Dart2Wasm. Initially, we're just going to focus on typed data, but this will give us a place to experiment with moving List and String to JS as well. In addition, someday down the road we hope to experiment with two additional compatibility changes: 1) Exclusively using double for all Dart numbers 2) Allowing undefined to flow as null. The two major benefits of this approach are: 1) Much faster JS interop 2) To make it easier to bring up Dart2JS applications on Dart2Wasm The only downside will be access overhead on the Wasm side, but the JS builtins proposal could potentially bring us close to parity with Wasm builtins someday. Tested: Wasm specific trivial refactor. Change-Id: I2c09426b6999507c1de6e584e9bc7072a088bda9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/313240 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Ömer Ağacan <omersa@google.com> Reviewed-by: William Hesse <whesse@google.com>
102 lines
2.9 KiB
Bash
Executable file
102 lines
2.9 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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# Run dart2wasm on the Dart VM. This script assumes the Dart repo's
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# directory structure.
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function follow_links() {
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file="$1"
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while [ -h "$file" ]; do
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# On Mac OS, readlink -f doesn't work.
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file="$(readlink "$file")"
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done
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echo "$file"
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}
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# Unlike $0, $BASH_SOURCE points to the absolute path of this file.
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PROG_NAME="$(follow_links "$BASH_SOURCE")"
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# Handle the case where dart-sdk/bin has been symlinked to.
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PROG_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
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SDK_DIR="$(cd "${PROG_DIR}/../.." ; pwd -P)"
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# Locate build directory, containing executables, snapshots and platform dill.
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if [[ `uname` == 'Darwin' ]]; then
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OUT_DIR="$SDK_DIR/xcodebuild"
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else
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OUT_DIR="$SDK_DIR/out"
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fi
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# Set DART_CONFIGURATION. Code copied from `dart` script in the same directory.
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if [ -z "$DART_CONFIGURATION" ];
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then
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DIRS=$( ls "$OUT_DIR" )
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# List of possible configurations in decreasing desirability.
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CONFIGS=("ReleaseX64" "ReleaseARM64" "ReleaseIA32" "DebugX64" "DebugIA32"
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"ReleaseARM" "DebugARM" "DebugARM64" )
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DART_CONFIGURATION="None"
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for CONFIG in ${CONFIGS[*]}
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do
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for DIR in $DIRS;
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do
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if [ "$CONFIG" = "$DIR" ];
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then
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# Choose most desirable configuration that is available and break.
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DART_CONFIGURATION="$DIR"
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break 2
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fi
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done
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done
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if [ "$DART_CONFIGURATION" = "None" ]
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then
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echo "No valid dart configuration found in $OUT_DIR"
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exit 1
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fi
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fi
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BIN_DIR="$OUT_DIR/$DART_CONFIGURATION"
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DART_PRECOMPILED_RUNTIME="$BIN_DIR/dart_precompiled_runtime"
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# Point to SDK directory.
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SDK_ARG="--dart-sdk=$SDK_DIR"
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# Point to built platform dill.
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PLATFORM="$BIN_DIR/dart2wasm_platform.dill"
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# Not the prettiest way to check for a target, and it doesn't support changing
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# the default, but it will do for experiments.
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for arg in "$@"; do
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if [[ "$arg" == "--stringref" ]]; then
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PLATFORM="$BIN_DIR/dart2wasm_stringref_platform.dill"
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fi
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if [[ "$arg" == "--js-compatibility" ]]; then
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PLATFORM="$BIN_DIR/dart2wasm_js_compatibility_platform.dill"
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fi
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done
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PLATFORM_ARG="--platform=$PLATFORM"
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unset EXTRA_VM_OPTIONS
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declare -a EXTRA_VM_OPTIONS
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# Choose snapshot with or without asserts enabled.
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SNAPSHOT_NAME="dart2wasm"
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case $0 in
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*_developer)
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EXTRA_VM_OPTIONS+=('--enable_asserts')
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SNAPSHOT_NAME="dart2wasm_asserts"
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;;
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esac
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SNAPSHOT="$BIN_DIR/$SNAPSHOT_NAME.snapshot"
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# We allow extra vm options to be passed in through an environment variable.
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if [[ $DART_VM_OPTIONS ]]; then
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read -a OPTIONS <<< "$DART_VM_OPTIONS"
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EXTRA_VM_OPTIONS+=("${OPTIONS[@]}")
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fi
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DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"
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exec "$DART_PRECOMPILED_RUNTIME" "--packages=$DART_ROOT/.packages" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "$SDK_ARG" "$PLATFORM_ARG" "$@"
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