asiva@google.com
5fd180cdfc
2. Create the empty_array object as a singleton in the VM isolate and remove it from the object store
3. Remove eager population of the functions_cache entry in the class. This results in a pretty impressive reduction of the initial isolate heap size:
- on IA32 it goes from 1331k to 1071k
- on X64 it goes from 2431k to 1911k
- snapshot size also is reduced from 859219 bytes to 789147 bytes.
(as a follow up change I will consider completely removing functions cache)
Review URL: https://chromiumcodereview.appspot.com//10827249
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10535 260f80e4-7a28-3924-810f-c04153c831b5
101 lines
2.9 KiB
C++
101 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/code_descriptors.h"
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namespace dart {
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void DescriptorList::AddDescriptor(PcDescriptors::Kind kind,
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intptr_t pc_offset,
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intptr_t deopt_id,
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intptr_t token_index,
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intptr_t try_index) {
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struct PcDesc data;
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data.pc_offset = pc_offset;
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data.kind = kind;
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data.deopt_id = deopt_id;
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data.token_index = token_index;
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data.try_index = try_index;
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list_.Add(data);
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}
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void DescriptorList::AddDeoptInfo(intptr_t pc_offset,
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intptr_t deopt_id,
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intptr_t token_index,
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intptr_t deopt_array_index) {
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struct PcDesc data;
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data.pc_offset = pc_offset;
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data.kind = PcDescriptors::kDeoptIndex;
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data.deopt_id = deopt_id;
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data.token_index = token_index;
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// Try_index is reused for deopt_array_index.
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data.try_index = deopt_array_index;
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list_.Add(data);
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}
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RawPcDescriptors* DescriptorList::FinalizePcDescriptors(uword entry_point) {
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intptr_t num_descriptors = Length();
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const PcDescriptors& descriptors =
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PcDescriptors::Handle(PcDescriptors::New(num_descriptors));
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for (intptr_t i = 0; i < num_descriptors; i++) {
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descriptors.AddDescriptor(i,
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(entry_point + PcOffset(i)),
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Kind(i),
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DeoptId(i),
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TokenPos(i),
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TryIndex(i));
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}
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return descriptors.raw();
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}
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void StackmapTableBuilder::AddEntry(intptr_t pc_offset,
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BitmapBuilder* bitmap) {
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stack_map_ = Stackmap::New(pc_offset, bitmap);
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list_.Add(stack_map_);
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}
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bool StackmapTableBuilder::Verify() {
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intptr_t num_entries = Length();
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Stackmap& map1 = Stackmap::Handle();
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Stackmap& map2 = Stackmap::Handle();
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for (intptr_t i = 1; i < num_entries; i++) {
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map1 = Map(i - 1);
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map2 = Map(i);
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// Ensure there are no duplicates and the entries are sorted.
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if (map1.PC() >= map2.PC()) {
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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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RawArray* StackmapTableBuilder::FinalizeStackmaps(const Code& code) {
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ASSERT(Verify());
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intptr_t num_entries = Length();
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uword entry_point = code.EntryPoint();
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if (num_entries == 0) {
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return Object::empty_array();
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}
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for (intptr_t i = 0; i < num_entries; i++) {
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stack_map_ = Map(i);
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stack_map_.SetPC(entry_point + stack_map_.PC());
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stack_map_.SetCode(code);
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}
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return Array::MakeArray(list_);
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}
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RawStackmap* StackmapTableBuilder::Map(int index) const {
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Stackmap& map = Stackmap::Handle();
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map ^= list_.At(index);
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return map.raw();
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}
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} // namespace dart
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