Alexander Markov
f9860f9db9
dart2bytecode can optionally add source position information (including line starts) to the generated bytecode (when '--bytecode-options=source-positions' flag is specified). If bytecode has source positions, they are now shown in stack traces involving interpreter frames. TEST=ci Change-Id: I1ae3326bac21201040be32c712514e71e96f51e2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433760 Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
// Copyright (c) 2025, 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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#if !defined(DART_PRECOMPILED_RUNTIME) || defined(DART_DYNAMIC_MODULES)
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#include "vm/line_starts_reader.h"
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#include "vm/object.h"
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#include "vm/token_position.h"
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namespace dart {
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LineStartsReader::LineStartsReader(const dart::TypedData& line_starts_data)
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: line_starts_data_(line_starts_data),
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element_type_(line_starts_data.ElementType()) {
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RELEASE_ASSERT((element_type_ == kUint16ArrayElement) ||
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(element_type_ == kUint32ArrayElement));
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}
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uint32_t LineStartsReader::MaxPosition() const {
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const intptr_t line_count = line_starts_data_.Length();
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if (line_count == 0) {
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return 0;
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}
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return At(line_count - 1);
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}
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bool LineStartsReader::LocationForPosition(intptr_t position,
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intptr_t* line,
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intptr_t* col) const {
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const intptr_t line_count = line_starts_data_.Length();
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if (position < 0 || static_cast<uint32_t>(position) > MaxPosition() ||
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line_count == 0) {
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return false;
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}
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intptr_t lo = 0;
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intptr_t hi = line_count;
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while (hi > lo + 1) {
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const intptr_t mid = lo + (hi - lo) / 2;
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const intptr_t mid_position = At(mid);
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if (mid_position > position) {
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hi = mid;
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} else {
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lo = mid;
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}
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}
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*line = lo + 1;
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if (col != nullptr) {
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*col = position - At(lo) + 1;
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}
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return true;
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}
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bool LineStartsReader::TokenRangeAtLine(intptr_t line_number,
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TokenPosition* first_token_index,
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TokenPosition* last_token_index) const {
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const intptr_t line_count = line_starts_data_.Length();
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if (line_number <= 0 || line_number > line_count) {
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return false;
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}
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*first_token_index = TokenPosition::Deserialize(At(line_number - 1));
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if (line_number == line_count) {
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*last_token_index = *first_token_index;
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} else {
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*last_token_index = TokenPosition::Deserialize(At(line_number) - 1);
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}
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return true;
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}
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} // namespace dart
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#endif // !defined(DART_PRECOMPILED_RUNTIME) || defined(DART_DYNAMIC_MODULES)
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