Modify dartanalyzer scripts to look more like dart2js scripts.

sdk/bin/dartanalyzer

 #!/bin/bash
 # Copyright (c) 2013, 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.
 
 # Run dartanalyzer.dart on the Dart VM. This script assumes the Dart SDK's
 # directory structure.
 
 function follow_links() {
   file="$1"
   while [ -h "$file" ]; do
     # On Mac OS, readlink -f doesn't work.
     file="$(readlink "$file")"
   done
   echo "$file"
 }
 
 # Unlike $0, $BASH_SOURCE points to the absolute path of this file.
 PROG_NAME="$(follow_links "$BASH_SOURCE")"
 
 # Handle the case where dart-sdk/bin has been symlinked to.
 BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
 
 SDK_ARG="--dart-sdk=$SDK_DIR"
 
+DART="$BIN_DIR/dart"
+
 SNAPSHOT="$BIN_DIR/snapshots/dartanalyzer.dart.snapshot"
 
-# We are running the snapshot in the built SDK.
-DART="$BIN_DIR/dart"
-exec "$DART" "$SNAPSHOT" "$SDK_ARG" "$@"
+unset EXTRA_VM_OPTIONS
+declare -a EXTRA_VM_OPTIONS
+
+# Set some optimization options that speed up analysis.
+# TODO(paulberry): are these needed?  Could the VM be improved so that
+# they are unnecessary?
+EXTRA_VM_OPTIONS+=("--heap_growth_rate=512")

[Ivan Posva, 2014/10/08 04:52:31]

Please do not use any of these flags unless you know exactly what kind of impact
they have. Once you have analyzed the impact of these flags, please report and
we will work with you to avoid the need of passing them.

+EXTRA_VM_OPTIONS+=("--inlining_hotness=90")
+EXTRA_VM_OPTIONS+=("--optimization_counter_threshold=5000")
+
+case $0 in
+  *_developer)
+    EXTRA_VM_OPTIONS+=('--checked')
+    ;;
+esac
+
+# We allow extra vm options to be passed in through an environment variable.
+if [[ $DART_VM_OPTIONS ]]; then
+  read -a OPTIONS <<< "$DART_VM_OPTIONS"
+  EXTRA_VM_OPTIONS+=("${OPTIONS[@]}")
+fi
+
+if test -f "$SNAPSHOT"; then
+  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "$SDK_ARG" "$@"
+else
+  DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"
+
+  ANALYZER="$DART_ROOT/pkg/analyzer/bin/analyzer.dart"
+
+  if [ -z "$DART_CONFIGURATION" ];
+  then
+    DART_CONFIGURATION="ReleaseIA32"
+  fi
+
+  if [[ `uname` == 'Darwin' ]]; then
+    BUILD_DIR="$DART_ROOT/xcodebuild/$DART_CONFIGURATION"
+  else
+    BUILD_DIR="$DART_ROOT/out/$DART_CONFIGURATION"
+  fi
+
+  PACKAGE_ROOT="$BUILD_DIR/packages/"
+
+  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "--package-root=$PACKAGE_ROOT" "$ANALYZER" "$SDK_ARG" "$@"
+fi