Ömer Sinan Ağacan
1b1740e941
To be able to know when we are generating a source map, make `dart compile wasm` aware of the `--no-source-maps` flag. The "name" segments of source mappings are also made `null` with this patch. Browsers don't use that segment and binaryen doesn't support it. Change-Id: I7b52c8fb7cef92ed60547e97ad137e0cd3967f26 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/378421 Commit-Queue: Ömer Ağacan <omersa@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
102 lines
3.2 KiB
Dart
102 lines
3.2 KiB
Dart
// Copyright (c) 2024, 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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import 'dart:js_interop';
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import 'dart:typed_data';
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import 'dart:convert';
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import 'package:source_maps/parser.dart';
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void f() {
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g();
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}
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void g() {
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throw 'hi';
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}
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runtimeFalse() => int.parse('1') == 0;
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// `frameDetails` is (line, column) of the frames we check.
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//
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// Information we don't check are "null": we don't want to check line/column
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// of standard library functions to avoid breaking the test with unrelated
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// changes to the standard library.
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void testMain(String testName, List<(int?, int?)?> frameDetails) {
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// Use `f` and `g` in a few places to make sure wasm-opt won't inline them
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// in the test.
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final fTearOff = f;
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final gTearOff = g;
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if (runtimeFalse()) f();
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if (runtimeFalse()) g();
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// Read source map of the current program.
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final compilationDir = const String.fromEnvironment("TEST_COMPILATION_DIR");
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final sourceMapFileContents =
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readfile('$compilationDir/${testName}_test.wasm.map');
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final mapping = parse(utf8.decode(sourceMapFileContents)) as SingleMapping;
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// Get some simple stack trace.
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String? stackTraceString;
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try {
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f();
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} catch (e, st) {
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stackTraceString = st.toString();
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}
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// Print the stack trace to make it easy to update the test.
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print("-----");
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print(stackTraceString);
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print("-----");
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final stackTraceLines = stackTraceString!.split('\n');
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for (int frameIdx = 0; frameIdx < frameDetails.length; frameIdx += 1) {
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final line = stackTraceLines[frameIdx];
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final hexOffsetMatch = stackTraceHexOffsetRegExp.firstMatch(line);
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if (hexOffsetMatch == null) {
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throw "Unable to parse hex offset from stack frame $frameIdx";
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}
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final hexOffsetStr = hexOffsetMatch.group(1)!; // includes '0x'
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final offset = int.tryParse(hexOffsetStr);
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if (offset == null) {
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throw "Unable to parse hex number in frame $frameIdx: $hexOffsetStr";
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}
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final span = mapping.spanFor(0, offset);
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final frameInfo = frameDetails[frameIdx];
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if (frameInfo == null) {
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if (span != null) {
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throw "Stack frame $frameIdx should not have a source span, but it is mapped: $span";
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}
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continue;
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}
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if (span == null) {
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print("Stack frame $frameIdx does not have source mapping");
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} else {
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if (frameInfo.$1 != null) {
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if (span.start.line + 1 != frameInfo.$1) {
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throw "Stack frame $frameIdx is expected to have line ${frameInfo.$1}, but it has line ${span.start.line + 1}";
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}
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}
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if (frameInfo.$2 != null) {
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if (span.start.column + 1 != frameInfo.$2) {
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throw "Stack frame $frameIdx is expected to have column ${frameInfo.$2}, but it has column ${span.start.column + 1}";
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}
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}
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}
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}
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}
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/// Read the file at the given [path].
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///
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/// This relies on the `readbuffer` function provided by d8.
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@JS()
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external JSArrayBuffer readbuffer(JSString path);
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/// Read the file at the given [path].
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Uint8List readfile(String path) => Uint8List.view(readbuffer(path.toJS).toDart);
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final stackTraceHexOffsetRegExp = RegExp(r'wasm-function.*(0x[0-9a-fA-F]+)\)$');
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