mirror of
https://github.com/dart-lang/sdk
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6e987b6eb5
This replaces _requestHeapSnapshot and _getObjectByAddresses, which relied on the invalid assumption that objects don't move and the heap hasn't mutated since the initial snapshot. Updates Observatory to the new format. Adds treemap visualization of the dominator tree. Adds the ability to save and load heap snapshots to files. Removes analysis grouping references by source and target class. Removes ability to navigate from a pixel in the fragmentation view to inspector. Removes ability to query the top retaining instance from an ordinary class browser. Change-Id: Ia7781c05d43bf3ec149f8b4ecab803b37c3ee981 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/112181 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Ben Konyi <bkonyi@google.com>
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// Copyright (c) 2018, 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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//
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// This file (and "raw_object_fields.cc") provide a kind of reflection that
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// allows us to identify the name of fields in hand-written "Raw..." classes
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// (from "raw_object.h") given the class and the offset within the object. This
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// is used for example by the snapshot profile writer ("v8_snapshot_writer.h")
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// to show the property names of these built-in objects in the snapshot profile.
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#ifndef RUNTIME_VM_RAW_OBJECT_FIELDS_H_
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#define RUNTIME_VM_RAW_OBJECT_FIELDS_H_
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#include <utility>
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#include "vm/hash_map.h"
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#include "vm/object.h"
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#include "vm/raw_object.h"
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namespace dart {
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#if defined(DART_PRECOMPILER) || !defined(DART_PRODUCT)
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class OffsetsTable : public ZoneAllocated {
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public:
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explicit OffsetsTable(Zone* zone);
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// Returns 'nullptr' if no offset was found.
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// Otherwise, the returned string is allocated in global static memory.
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const char* FieldNameForOffset(intptr_t cid, intptr_t offset);
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struct OffsetsTableEntry {
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const intptr_t class_id;
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const char* field_name;
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intptr_t offset;
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};
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static OffsetsTableEntry offsets_table[];
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private:
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struct IntAndIntToStringMapTraits {
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typedef std::pair<intptr_t, intptr_t> Key;
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typedef const char* Value;
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struct Pair {
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Key key;
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Value value;
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Pair() : key({-1, -1}), value(nullptr) {}
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Pair(Key k, Value v) : key(k), value(v) {}
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};
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static Value ValueOf(Pair pair) { return pair.value; }
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static Key KeyOf(Pair pair) { return pair.key; }
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static size_t Hashcode(Key key) { return key.first ^ key.second; }
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static bool IsKeyEqual(Pair x, Key y) {
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return x.key.first == y.first && x.key.second == y.second;
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}
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};
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DirectChainedHashMap<IntAndIntToStringMapTraits> cached_offsets_;
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};
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#else
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class OffsetsTable : public ZoneAllocated {
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public:
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explicit OffsetsTable(Zone* zone) {}
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const char* FieldNameForOffset(intptr_t cid, intptr_t offset) {
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return nullptr;
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}
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};
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#endif
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} // namespace dart
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#endif // RUNTIME_VM_RAW_OBJECT_FIELDS_H_
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