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1166f83bf6
We now check all of the scripts which make up a library. If any script is modified, then we consider that library to be modified. We also consider any library which imports a modified library to be modified. To propagate this info efficiently, we build and discard the imported-by graph when beginning a reload. The embedder must provide a FileModifiedCallback in order to support the detection of modified scripts. In order to detect changes to package: libraries, we have modified the embedder interface to provide the resolved url when possible, so that we don't need to re-resolve package uris when checking for reload. This change is incompatible and all embedders will need to be updated. We now support a "force" flag when reloading sources. This causes all libraries to be reloaded regardless of whether the underlying scripts have been updated. Closes #26919 R=johnmccutchan@google.com Review URL: https://codereview.chromium.org/2186423002 .
122 lines
2.9 KiB
C++
122 lines
2.9 KiB
C++
// Copyright (c) 2012, 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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#include "vm/bit_vector.h"
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#include "vm/os.h"
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namespace dart {
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void BitVector::Iterator::Advance() {
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++bit_index_;
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// Skip zero words.
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if (current_word_ == 0) {
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do {
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++word_index_;
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if (Done()) return;
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current_word_ = target_->data_[word_index_];
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} while (current_word_ == 0);
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bit_index_ = word_index_ * kBitsPerWord;
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}
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// Skip zero bytes.
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while ((current_word_ & 0xff) == 0) {
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current_word_ >>= 8;
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bit_index_ += 8;
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}
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// Skip zero bits.
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while ((current_word_ & 0x1) == 0) {
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current_word_ >>= 1;
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++bit_index_;
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}
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current_word_ = current_word_ >> 1;
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}
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bool BitVector::Equals(const BitVector& other) const {
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if (length_ != other.length_) return false;
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intptr_t i = 0;
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for (; i < data_length_ - 1; i++) {
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if (data_[i] != other.data_[i]) return false;
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}
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if (i < data_length_) {
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// Don't compare bits beyond length_.
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const intptr_t shift_size = (kBitsPerWord - length_) & (kBitsPerWord - 1);
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const uword mask = static_cast<uword>(-1) >> shift_size;
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if ((data_[i] & mask) != (other.data_[i] & mask)) return false;
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}
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return true;
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}
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bool BitVector::AddAll(const BitVector* from) {
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ASSERT(data_length_ == from->data_length_);
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bool changed = false;
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for (intptr_t i = 0; i < data_length_; i++) {
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const uword before = data_[i];
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const uword after = data_[i] | from->data_[i];
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if (before != after) {
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changed = true;
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data_[i] = after;
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}
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}
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return changed;
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}
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bool BitVector::RemoveAll(const BitVector* from) {
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ASSERT(data_length_ == from->data_length_);
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bool changed = false;
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for (intptr_t i = 0; i < data_length_; i++) {
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const uword before = data_[i];
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const uword after = data_[i] & ~from->data_[i];
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if (before != after) {
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changed = true;
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data_[i] = after;
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}
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}
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return changed;
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}
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bool BitVector::KillAndAdd(BitVector* kill, BitVector* gen) {
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ASSERT(data_length_ == kill->data_length_);
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ASSERT(data_length_ == gen->data_length_);
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bool changed = false;
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for (intptr_t i = 0; i < data_length_; i++) {
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const uword before = data_[i];
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const uword after = data_[i] | (gen->data_[i] & ~kill->data_[i]);
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if (before != after) changed = true;
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data_[i] = after;
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}
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return changed;
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}
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void BitVector::Intersect(const BitVector* other) {
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ASSERT(other->length() == length());
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for (intptr_t i = 0; i < data_length_; i++) {
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data_[i] = data_[i] & other->data_[i];
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}
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}
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bool BitVector::IsEmpty() const {
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for (intptr_t i = 0; i < data_length_; i++) {
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if (data_[i] != 0) {
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return false;
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}
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}
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return true;
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}
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void BitVector::Print() const {
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OS::Print("[");
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for (intptr_t i = 0; i < length_; i++) {
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OS::Print(Contains(i) ? "1" : "0");
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}
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OS::Print("]");
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}
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} // namespace dart
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