Devon Carew
98befcf281
Change-Id: I365abf095f0801bb8ce864f3bbaa57ff298164c3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/402881 Reviewed-by: Nate Bosch <nbosch@google.com> Commit-Queue: Devon Carew <devoncarew@google.com>
91 lines
3.4 KiB
Dart
91 lines
3.4 KiB
Dart
// Copyright (c) 2020, 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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/// Helpers for parsing Code object name produced by Code::QualifiedName
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library;
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// Wrapper around the name of a Code object produced by Code::QualifiedName.
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//
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// Raw textual representation of the name contains not just the name of itself,
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// but also various attributes (whether this code object originates from the
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// Dart function or from a stub, whether it is optimized or not, whether
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// it corresponds to some synthetic function, etc).
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class Name {
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/// Raw textual representation of the name as it occurred in the output
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/// of the AOT compiler.
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final String raw;
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/// Pretty version of the name, with some of the irrelevant information
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/// removed from it.
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///
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/// Note: we still expect this name to be unique within compilation,
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/// so we are not removing any details that are used for disambiguation.
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/// The only exception are type testing stubs, these refer to type names
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/// and types names are not bound to be unique between compilations.
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late final String scrubbed =
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raw.replaceAll(isStub ? _stubScrubbingRe : _scrubbingRe, '');
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Name(this.raw);
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/// Returns true if this name refers to a stub.
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bool get isStub => raw.startsWith('[Stub] ');
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/// Returns true if this name refers to an allocation stub.
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bool get isAllocationStub => raw.startsWith('[Stub] Allocate ');
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/// Returns true if this name refers to a type testing stub.
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bool get isTypeTestingStub => raw.startsWith('[Stub] Type Test ');
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/// Split this name into individual '.' separated components (e.g. names of
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/// its parent functions).
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List<String> get components {
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// Break the rest of the name into components.
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final result = scrubbed.split('.');
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// Constructor names look like this 'new <ClassName>.<CtorName>' so
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// we need to concatenate the first two components back to form
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// the constructor name.
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if (result.first.startsWith('new ')) {
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result[0] = '${result[0]}${result[1]}';
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result.removeAt(1);
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}
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return result;
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}
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/// Split raw name into individual '.' separated components (e.g. names of
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/// its parent functions).
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List<String> get rawComponents {
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// Break the rest of the name into components.
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final result = raw.split('.');
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// Constructor names look like this 'new <ClassName>.<CtorName>' so
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// we need to concatenate the first two components back to form
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// the constructor name.
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if (result.first.startsWith('new ')) {
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result[0] = '${result[0]}.${result[1]}';
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result.removeAt(1);
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}
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return result;
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}
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static String collapse(String name) =>
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name.replaceAll(_collapseRe, '<anonymous closure>');
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}
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// Remove useless prefixes and private library suffixes from the raw name.
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//
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// Note that we want to keep anonymous closure token positions in the name
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// still, these names are formatted as '<anonymous closure @\d+>'.
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final _scrubbingRe =
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RegExp(r'\[(Optimized|Unoptimized|Stub)\]\s*|@\d+(?![>\d])');
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// Remove useless prefixes and private library suffixes from the raw name
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// for stubs.
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final _stubScrubbingRe = RegExp(r'\[Stub\]\s*|@\d+|\(H[a-f\d]+\) ');
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// Remove token positions from anonymous closure names.
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final _collapseRe = RegExp(r'<anonymous closure @\d+>');
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