mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
![Ryan Macnak](/assets/img/avatar_default.png)
This reverts commitc8f3f132ad
. Revert "[vm] Fix CoreSnapshotSize and StandaloneSnapshotSize to account for the image page size." This reverts commit1d6ab52f38
. Bug: b/140791872 Change-Id: I34c42310e3ec4a09048967f34a0e1ddc6a67ea93 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116688 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
797 lines
25 KiB
C++
797 lines
25 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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#ifndef RUNTIME_VM_SNAPSHOT_H_
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#define RUNTIME_VM_SNAPSHOT_H_
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#include <memory>
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#include <utility>
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#include "platform/assert.h"
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#include "vm/allocation.h"
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#include "vm/bitfield.h"
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#include "vm/datastream.h"
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#include "vm/finalizable_data.h"
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#include "vm/globals.h"
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#include "vm/growable_array.h"
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#include "vm/isolate.h"
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#include "vm/message.h"
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#include "vm/visitor.h"
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namespace dart {
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// Forward declarations.
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class AbstractType;
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class Array;
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class Class;
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class ClassTable;
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class Closure;
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class Code;
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class ExternalTypedData;
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class TypedDataBase;
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class GrowableObjectArray;
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class Heap;
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class Instance;
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class Instructions;
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class LanguageError;
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class Library;
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class LinkedHashMap;
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class Object;
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class PassiveObject;
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class ObjectStore;
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class MegamorphicCache;
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class PageSpace;
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class TypedDataView;
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class RawApiError;
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class RawArray;
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class RawCapability;
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class RawClass;
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class RawClosure;
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class RawClosureData;
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class RawCodeSourceMap;
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class RawContext;
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class RawContextScope;
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class RawDouble;
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class RawExceptionHandlers;
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class RawFfiTrampolineData;
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class RawField;
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class RawFloat32x4;
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class RawFloat64x2;
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class RawFunction;
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class RawGrowableObjectArray;
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class RawICData;
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class RawImmutableArray;
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class RawInstructions;
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class RawInt32x4;
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class RawRegExp;
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class RawLanguageError;
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class RawLibrary;
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class RawLibraryPrefix;
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class RawLinkedHashMap;
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class RawLocalVarDescriptors;
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class RawMegamorphicCache;
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class RawMint;
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class RawNamespace;
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class RawObject;
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class RawObjectPool;
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class RawOneByteString;
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class RawPatchClass;
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class RawPcDescriptors;
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class RawReceivePort;
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class RawRedirectionData;
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class RawNativeEntryData;
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class RawScript;
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class RawSignatureData;
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class RawSendPort;
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class RawSmi;
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class RawStackMap;
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class RawStackTrace;
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class RawSubtypeTestCache;
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class RawTwoByteString;
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class RawType;
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class RawTypeArguments;
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class RawTypedData;
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class RawTypedDataView;
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class RawTypeParameter;
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class RawTypeRef;
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class RawUnhandledException;
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class RawWeakProperty;
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class String;
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class TypeArguments;
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class TypedData;
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class UnhandledException;
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// Serialized object header encoding is as follows:
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// - Smi: the Smi value is written as is (last bit is not tagged).
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// - VM object (from VM isolate): (object id in vm isolate | 0x3)
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// This value is serialized as a negative number.
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// (note VM objects are never serialized, they are expected to be found
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// using ths unique ID assigned to them).
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// - Reference to object that has already been written: (object id | 0x3)
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// This valus is serialized as a positive number.
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// - Object that is seen for the first time (inlined in the stream):
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// (a unique id for this object | 0x1)
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enum SerializedHeaderType {
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kInlined = 0x1,
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kObjectId = 0x3,
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};
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static const int8_t kHeaderTagBits = 2;
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static const int8_t kObjectIdBits = (kBitsPerInt32 - (kHeaderTagBits + 1));
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static const intptr_t kMaxObjectId = (kMaxUint32 >> (kHeaderTagBits + 1));
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static const bool kAsReference = true;
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static const bool kAsInlinedObject = false;
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static const intptr_t kInvalidPatchIndex = -1;
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class SerializedHeaderTag
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: public BitField<intptr_t, enum SerializedHeaderType, 0, kHeaderTagBits> {
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};
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class SerializedHeaderData
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: public BitField<intptr_t, intptr_t, kHeaderTagBits, kObjectIdBits> {};
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enum DeserializeState {
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kIsDeserialized = 0,
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kIsNotDeserialized = 1,
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};
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enum SerializeState {
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kIsSerialized = 0,
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kIsNotSerialized = 1,
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};
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// Structure capturing the raw snapshot.
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//
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class Snapshot {
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public:
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enum Kind {
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kFull, // Full snapshot of core libraries or an application.
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kFullJIT, // Full + JIT code
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kFullAOT, // Full + AOT code
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kMessage, // A partial snapshot used only for isolate messaging.
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kNone, // gen_snapshot
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kInvalid
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};
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static const char* KindToCString(Kind kind);
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static const Snapshot* SetupFromBuffer(const void* raw_memory);
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static const int32_t kMagicValue = 0xdcdcf5f5;
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static const intptr_t kMagicOffset = 0;
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static const intptr_t kMagicSize = sizeof(int32_t);
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static const intptr_t kLengthOffset = kMagicOffset + kMagicSize;
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static const intptr_t kLengthSize = sizeof(int64_t);
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static const intptr_t kKindOffset = kLengthOffset + kLengthSize;
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static const intptr_t kKindSize = sizeof(int64_t);
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static const intptr_t kHeaderSize = kKindOffset + kKindSize;
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// Accessors.
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bool check_magic() const {
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return Read<int32_t>(kMagicOffset) == kMagicValue;
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}
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void set_magic() { return Write<int32_t>(kMagicOffset, kMagicValue); }
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// Excluding the magic value from the size written in the buffer is needed
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// so we give a proper version mismatch error for snapshots create before
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// magic value was written by the VM instead of the embedder.
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int64_t large_length() const {
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return Read<int64_t>(kLengthOffset) + kMagicSize;
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}
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intptr_t length() const { return static_cast<intptr_t>(large_length()); }
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void set_length(intptr_t value) {
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return Write<int64_t>(kLengthOffset, value - kMagicSize);
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}
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Kind kind() const { return static_cast<Kind>(Read<int64_t>(kKindOffset)); }
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void set_kind(Kind value) { return Write<int64_t>(kKindOffset, value); }
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static bool IsFull(Kind kind) {
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return (kind == kFull) || (kind == kFullJIT) || (kind == kFullAOT);
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}
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static bool IncludesCode(Kind kind) {
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return (kind == kFullJIT) || (kind == kFullAOT);
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}
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static bool IncludesBytecode(Kind kind) {
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return (kind == kFull) || (kind == kFullJIT);
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}
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const uint8_t* Addr() const { return reinterpret_cast<const uint8_t*>(this); }
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const uint8_t* DataImage() const {
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if (!IncludesCode(kind())) {
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return NULL;
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}
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uword offset = Utils::RoundUp(length(), OS::kMaxPreferredCodeAlignment);
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return Addr() + offset;
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}
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private:
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// Prevent Snapshot from ever being allocated directly.
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Snapshot();
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template <typename T>
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T Read(intptr_t offset) const {
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return ReadUnaligned(
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reinterpret_cast<const T*>(reinterpret_cast<uword>(this) + offset));
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}
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template <typename T>
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void Write(intptr_t offset, T value) {
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return StoreUnaligned(
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reinterpret_cast<T*>(reinterpret_cast<uword>(this) + offset), value);
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}
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DISALLOW_COPY_AND_ASSIGN(Snapshot);
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};
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class BaseReader {
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public:
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BaseReader(const uint8_t* buffer, intptr_t size) : stream_(buffer, size) {}
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// Reads raw data (for basic types).
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// sizeof(T) must be in {1,2,4,8}.
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template <typename T>
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T Read() {
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return ReadStream::Raw<sizeof(T), T>::Read(&stream_);
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}
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classid_t ReadClassIDValue() {
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uint32_t value = Read<uint32_t>();
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return static_cast<classid_t>(value);
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}
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COMPILE_ASSERT(sizeof(uint32_t) >= sizeof(classid_t));
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void ReadBytes(uint8_t* addr, intptr_t len) { stream_.ReadBytes(addr, len); }
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double ReadDouble() {
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double result;
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stream_.ReadBytes(reinterpret_cast<uint8_t*>(&result), sizeof(result));
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return result;
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}
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intptr_t ReadTags() {
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const intptr_t tags = static_cast<intptr_t>(Read<int8_t>()) & 0xff;
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return tags;
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}
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const uint8_t* CurrentBufferAddress() const {
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return stream_.AddressOfCurrentPosition();
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}
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void Align(intptr_t value) { stream_.Align(value); }
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void Advance(intptr_t value) { stream_.Advance(value); }
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intptr_t PendingBytes() const { return stream_.PendingBytes(); }
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RawSmi* ReadAsSmi();
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intptr_t ReadSmiValue();
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// Negative header value indicates VM isolate object id.
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bool IsVMIsolateObject(intptr_t header_value) { return (header_value < 0); }
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intptr_t GetVMIsolateObjectId(intptr_t header_val) {
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ASSERT(IsVMIsolateObject(header_val));
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intptr_t value = -header_val; // Header is negative for VM isolate objects.
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ASSERT(SerializedHeaderTag::decode(value) == kObjectId);
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return SerializedHeaderData::decode(value);
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}
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private:
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ReadStream stream_; // input stream.
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};
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class BackRefNode : public ValueObject {
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public:
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BackRefNode(Object* reference, DeserializeState state)
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: reference_(reference), state_(state) {}
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Object* reference() const { return reference_; }
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bool is_deserialized() const { return state_ == kIsDeserialized; }
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void set_state(DeserializeState state) { state_ = state; }
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BackRefNode& operator=(const BackRefNode& other) {
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reference_ = other.reference_;
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state_ = other.state_;
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return *this;
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}
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private:
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Object* reference_;
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DeserializeState state_;
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};
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// Reads a snapshot into objects.
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class SnapshotReader : public BaseReader {
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public:
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Thread* thread() const { return thread_; }
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Zone* zone() const { return zone_; }
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Isolate* isolate() const { return thread_->isolate(); }
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Heap* heap() const { return heap_; }
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ObjectStore* object_store() const { return isolate()->object_store(); }
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ClassTable* class_table() const { return isolate()->class_table(); }
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PassiveObject* PassiveObjectHandle() { return &pobj_; }
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Array* ArrayHandle() { return &array_; }
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Class* ClassHandle() { return &cls_; }
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Code* CodeHandle() { return &code_; }
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Instance* InstanceHandle() { return &instance_; }
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Instructions* InstructionsHandle() { return &instructions_; }
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String* StringHandle() { return &str_; }
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AbstractType* TypeHandle() { return &type_; }
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TypeArguments* TypeArgumentsHandle() { return &type_arguments_; }
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GrowableObjectArray* TokensHandle() { return &tokens_; }
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ExternalTypedData* DataHandle() { return &data_; }
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TypedDataBase* TypedDataBaseHandle() { return &typed_data_base_; }
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TypedData* TypedDataHandle() { return &typed_data_; }
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TypedDataView* TypedDataViewHandle() { return &typed_data_view_; }
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Function* FunctionHandle() { return &function_; }
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Snapshot::Kind kind() const { return kind_; }
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// Reads an object.
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RawObject* ReadObject();
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// Add object to backward references.
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void AddBackRef(intptr_t id, Object* obj, DeserializeState state);
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// Get an object from the backward references list.
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Object* GetBackRef(intptr_t id);
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// Read version number of snapshot and verify.
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RawApiError* VerifyVersionAndFeatures(Isolate* isolate);
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RawObject* NewInteger(int64_t value);
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protected:
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SnapshotReader(const uint8_t* buffer,
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intptr_t size,
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Snapshot::Kind kind,
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ZoneGrowableArray<BackRefNode>* backward_references,
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Thread* thread);
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~SnapshotReader() {}
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ZoneGrowableArray<BackRefNode>* GetBackwardReferenceTable() const {
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return backward_references_;
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}
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void ResetBackwardReferenceTable() { backward_references_ = NULL; }
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PageSpace* old_space() const { return old_space_; }
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private:
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void EnqueueTypePostprocessing(const AbstractType& type);
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void RunDelayedTypePostprocessing();
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void EnqueueRehashingOfMap(const LinkedHashMap& map);
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void EnqueueRehashingOfSet(const Object& set);
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RawObject* RunDelayedRehashingOfMaps();
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RawClass* ReadClassId(intptr_t object_id);
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RawObject* ReadStaticImplicitClosure(intptr_t object_id, intptr_t cls_header);
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// Implementation to read an object.
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RawObject* ReadObjectImpl(bool as_reference);
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RawObject* ReadObjectImpl(intptr_t header, bool as_reference);
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// Read a Dart Instance object.
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RawObject* ReadInstance(intptr_t object_id, intptr_t tags, bool as_reference);
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// Read a VM isolate object that was serialized as an Id.
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RawObject* ReadVMIsolateObject(intptr_t object_id);
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// Read an object that was serialized as an Id (singleton in object store,
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// or an object that was already serialized before).
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RawObject* ReadIndexedObject(intptr_t object_id);
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// Decode class id from the header field.
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intptr_t LookupInternalClass(intptr_t class_header);
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void ArrayReadFrom(intptr_t object_id,
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const Array& result,
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intptr_t len,
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intptr_t tags);
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intptr_t NextAvailableObjectId() const;
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void SetReadException(const char* msg);
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RawObject* VmIsolateSnapshotObject(intptr_t index) const;
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bool is_vm_isolate() const;
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Snapshot::Kind kind_; // Indicates type of the snapshot.
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Thread* thread_; // Current thread.
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Zone* zone_; // Zone for allocations while reading.
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Heap* heap_; // Heap of the current isolate.
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PageSpace* old_space_; // Old space of the current isolate.
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Class& cls_; // Temporary Class handle.
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Code& code_; // Temporary Code handle.
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Instance& instance_; // Temporary Instance handle
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Instructions& instructions_; // Temporary Instructions handle
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Object& obj_; // Temporary Object handle.
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PassiveObject& pobj_; // Temporary PassiveObject handle.
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Array& array_; // Temporary Array handle.
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Field& field_; // Temporary Field handle.
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String& str_; // Temporary String handle.
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Library& library_; // Temporary library handle.
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AbstractType& type_; // Temporary type handle.
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TypeArguments& type_arguments_; // Temporary type argument handle.
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GrowableObjectArray& tokens_; // Temporary tokens handle.
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ExternalTypedData& data_; // Temporary stream data handle.
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TypedDataBase& typed_data_base_; // Temporary typed data base handle.
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TypedData& typed_data_; // Temporary typed data handle.
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TypedDataView& typed_data_view_; // Temporary typed data view handle.
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Function& function_; // Temporary function handle.
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UnhandledException& error_; // Error handle.
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const Class& set_class_; // The LinkedHashSet class.
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intptr_t max_vm_isolate_object_id_;
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ZoneGrowableArray<BackRefNode>* backward_references_;
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GrowableObjectArray& types_to_postprocess_;
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GrowableObjectArray& objects_to_rehash_;
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friend class ApiError;
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friend class Array;
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friend class Class;
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friend class Closure;
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friend class ClosureData;
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friend class Context;
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friend class ContextScope;
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friend class ExceptionHandlers;
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friend class Field;
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friend class Function;
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friend class GrowableObjectArray;
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friend class ICData;
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friend class ImmutableArray;
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friend class KernelProgramInfo;
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friend class LanguageError;
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friend class Library;
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friend class LibraryPrefix;
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friend class LinkedHashMap;
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friend class MirrorReference;
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friend class Namespace;
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friend class PatchClass;
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friend class RedirectionData;
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friend class RegExp;
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friend class Script;
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friend class SignatureData;
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friend class SubtypeTestCache;
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friend class TransferableTypedData;
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friend class Type;
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friend class TypedDataView;
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friend class TypeArguments;
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friend class TypeParameter;
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friend class TypeRef;
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friend class UnhandledException;
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friend class WeakProperty;
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DISALLOW_COPY_AND_ASSIGN(SnapshotReader);
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};
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class MessageSnapshotReader : public SnapshotReader {
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public:
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MessageSnapshotReader(Message* message, Thread* thread);
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~MessageSnapshotReader();
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MessageFinalizableData* finalizable_data() const { return finalizable_data_; }
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private:
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MessageFinalizableData* finalizable_data_;
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DISALLOW_COPY_AND_ASSIGN(MessageSnapshotReader);
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};
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class BaseWriter : public StackResource {
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public:
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uint8_t* buffer() { return stream_.buffer(); }
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intptr_t BytesWritten() const { return stream_.bytes_written(); }
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// Writes raw data to the stream (basic type).
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// sizeof(T) must be in {1,2,4,8}.
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template <typename T>
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void Write(T value) {
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WriteStream::Raw<sizeof(T), T>::Write(&stream_, value);
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}
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void WriteClassIDValue(classid_t value) { Write<uint32_t>(value); }
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COMPILE_ASSERT(sizeof(uint32_t) >= sizeof(classid_t));
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// Write an object that is serialized as an Id (singleton in object store,
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// or an object that was already serialized before).
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void WriteIndexedObject(intptr_t object_id) {
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ASSERT(object_id <= kMaxObjectId);
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intptr_t value = 0;
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value = SerializedHeaderTag::update(kObjectId, value);
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value = SerializedHeaderData::update(object_id, value);
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Write<int32_t>(value);
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}
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// Write a VM Isolateobject that is serialized as an Id.
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|
void WriteVMIsolateObject(intptr_t object_id) {
|
|
ASSERT(object_id <= kMaxObjectId);
|
|
intptr_t value = 0;
|
|
value = SerializedHeaderTag::update(kObjectId, value);
|
|
value = SerializedHeaderData::update(object_id, value);
|
|
Write<int32_t>(-value); // Write as a negative value.
|
|
}
|
|
|
|
// Write serialization header information for an object.
|
|
void WriteInlinedObjectHeader(intptr_t id) {
|
|
ASSERT(id <= kMaxObjectId);
|
|
intptr_t value = 0;
|
|
value = SerializedHeaderTag::update(kInlined, value);
|
|
value = SerializedHeaderData::update(id, value);
|
|
Write<int32_t>(value);
|
|
}
|
|
|
|
void WriteTags(intptr_t tags) {
|
|
const intptr_t flags = tags & 0xff;
|
|
Write<int8_t>(static_cast<int8_t>(flags));
|
|
}
|
|
|
|
void Align(intptr_t value) { stream_.Align(value); }
|
|
|
|
// Write out a buffer of bytes.
|
|
void WriteBytes(const uint8_t* addr, intptr_t len) {
|
|
stream_.WriteBytes(addr, len);
|
|
}
|
|
|
|
void WriteDouble(double value) {
|
|
stream_.WriteBytes(reinterpret_cast<const uint8_t*>(&value), sizeof(value));
|
|
}
|
|
|
|
protected:
|
|
BaseWriter(ReAlloc alloc, DeAlloc dealloc, intptr_t initial_size)
|
|
: StackResource(Thread::Current()),
|
|
buffer_(NULL),
|
|
stream_(&buffer_, alloc, initial_size),
|
|
dealloc_(dealloc) {
|
|
ASSERT(alloc != NULL);
|
|
}
|
|
~BaseWriter() {}
|
|
|
|
void ReserveHeader() {
|
|
// Make room for recording snapshot buffer size.
|
|
stream_.SetPosition(Snapshot::kHeaderSize);
|
|
}
|
|
|
|
void FillHeader(Snapshot::Kind kind) {
|
|
Snapshot* header = reinterpret_cast<Snapshot*>(stream_.buffer());
|
|
header->set_magic();
|
|
header->set_length(stream_.bytes_written());
|
|
header->set_kind(kind);
|
|
}
|
|
|
|
void FreeBuffer() {
|
|
dealloc_(stream_.buffer());
|
|
stream_.set_buffer(NULL);
|
|
}
|
|
|
|
private:
|
|
uint8_t* buffer_;
|
|
WriteStream stream_;
|
|
DeAlloc dealloc_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(BaseWriter);
|
|
};
|
|
|
|
class ForwardList {
|
|
public:
|
|
explicit ForwardList(Thread* thread, intptr_t first_object_id);
|
|
~ForwardList();
|
|
|
|
class Node : public ZoneAllocated {
|
|
public:
|
|
Node(const Object* obj, SerializeState state) : obj_(obj), state_(state) {}
|
|
const Object* obj() const { return obj_; }
|
|
bool is_serialized() const { return state_ == kIsSerialized; }
|
|
|
|
private:
|
|
// Private to ensure the invariant of first_unprocessed_object_id_.
|
|
void set_state(SerializeState value) { state_ = value; }
|
|
|
|
const Object* obj_;
|
|
SerializeState state_;
|
|
|
|
friend class ForwardList;
|
|
DISALLOW_COPY_AND_ASSIGN(Node);
|
|
};
|
|
|
|
Node* NodeForObjectId(intptr_t object_id) const {
|
|
return nodes_[object_id - first_object_id_];
|
|
}
|
|
|
|
// Returns the id for the added object.
|
|
intptr_t AddObject(Zone* zone, RawObject* raw, SerializeState state);
|
|
|
|
// Returns the id for the object it it exists in the list.
|
|
intptr_t FindObject(RawObject* raw);
|
|
|
|
// Exhaustively processes all unserialized objects in this list. 'writer' may
|
|
// concurrently add more objects.
|
|
void SerializeAll(ObjectVisitor* writer);
|
|
|
|
// Set state of object in forward list.
|
|
void SetState(intptr_t object_id, SerializeState state) {
|
|
NodeForObjectId(object_id)->set_state(state);
|
|
}
|
|
|
|
private:
|
|
intptr_t first_object_id() const { return first_object_id_; }
|
|
intptr_t next_object_id() const { return nodes_.length() + first_object_id_; }
|
|
Isolate* isolate() const { return thread_->isolate(); }
|
|
|
|
Thread* thread_;
|
|
const intptr_t first_object_id_;
|
|
GrowableArray<Node*> nodes_;
|
|
intptr_t first_unprocessed_object_id_;
|
|
|
|
void SetObjectId(RawObject* object, intptr_t id);
|
|
intptr_t GetObjectId(RawObject* object);
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ForwardList);
|
|
};
|
|
|
|
class SnapshotWriter : public BaseWriter {
|
|
protected:
|
|
SnapshotWriter(Thread* thread,
|
|
Snapshot::Kind kind,
|
|
ReAlloc alloc,
|
|
DeAlloc dealloc,
|
|
intptr_t initial_size,
|
|
ForwardList* forward_list,
|
|
bool can_send_any_object);
|
|
|
|
public:
|
|
// Snapshot kind.
|
|
Snapshot::Kind kind() const { return kind_; }
|
|
Thread* thread() const { return thread_; }
|
|
Zone* zone() const { return thread_->zone(); }
|
|
Isolate* isolate() const { return thread_->isolate(); }
|
|
Heap* heap() const { return isolate()->heap(); }
|
|
|
|
// Serialize an object into the buffer.
|
|
void WriteObject(RawObject* raw);
|
|
|
|
static uint32_t GetObjectTags(RawObject* raw);
|
|
static uword GetObjectTagsAndHash(RawObject* raw);
|
|
|
|
Exceptions::ExceptionType exception_type() const { return exception_type_; }
|
|
void set_exception_type(Exceptions::ExceptionType type) {
|
|
exception_type_ = type;
|
|
}
|
|
const char* exception_msg() const { return exception_msg_; }
|
|
void set_exception_msg(const char* msg) { exception_msg_ = msg; }
|
|
bool can_send_any_object() const { return can_send_any_object_; }
|
|
void ThrowException(Exceptions::ExceptionType type, const char* msg);
|
|
|
|
// Write a version string for the snapshot.
|
|
void WriteVersionAndFeatures();
|
|
|
|
RawFunction* IsSerializableClosure(RawClosure* closure);
|
|
|
|
void WriteStaticImplicitClosure(intptr_t object_id,
|
|
RawFunction* func,
|
|
intptr_t tags);
|
|
|
|
protected:
|
|
bool CheckAndWritePredefinedObject(RawObject* raw);
|
|
bool HandleVMIsolateObject(RawObject* raw);
|
|
|
|
void WriteClassId(RawClass* cls);
|
|
void WriteObjectImpl(RawObject* raw, bool as_reference);
|
|
void WriteMarkedObjectImpl(RawObject* raw,
|
|
intptr_t tags,
|
|
intptr_t object_id,
|
|
bool as_reference);
|
|
void WriteForwardedObjects();
|
|
void ArrayWriteTo(intptr_t object_id,
|
|
intptr_t array_kind,
|
|
intptr_t tags,
|
|
RawSmi* length,
|
|
RawTypeArguments* type_arguments,
|
|
RawObject* data[],
|
|
bool as_reference);
|
|
RawClass* GetFunctionOwner(RawFunction* func);
|
|
void CheckForNativeFields(RawClass* cls);
|
|
void SetWriteException(Exceptions::ExceptionType type, const char* msg);
|
|
void WriteInstance(RawObject* raw,
|
|
RawClass* cls,
|
|
intptr_t tags,
|
|
intptr_t object_id,
|
|
bool as_reference);
|
|
bool AllowObjectsInDartLibrary(RawLibrary* library);
|
|
intptr_t FindVmSnapshotObject(RawObject* rawobj);
|
|
|
|
ObjectStore* object_store() const { return object_store_; }
|
|
|
|
private:
|
|
Thread* thread_;
|
|
Snapshot::Kind kind_;
|
|
ObjectStore* object_store_; // Object store for common classes.
|
|
ClassTable* class_table_; // Class table for the class index to class lookup.
|
|
ForwardList* forward_list_;
|
|
Exceptions::ExceptionType exception_type_; // Exception type.
|
|
const char* exception_msg_; // Message associated with exception.
|
|
bool can_send_any_object_; // True if any Dart instance can be sent.
|
|
|
|
friend class RawArray;
|
|
friend class RawClass;
|
|
friend class RawClosureData;
|
|
friend class RawCode;
|
|
friend class RawContextScope;
|
|
friend class RawDynamicLibrary;
|
|
friend class RawExceptionHandlers;
|
|
friend class RawField;
|
|
friend class RawFunction;
|
|
friend class RawGrowableObjectArray;
|
|
friend class RawImmutableArray;
|
|
friend class RawInstructions;
|
|
friend class RawLibrary;
|
|
friend class RawLinkedHashMap;
|
|
friend class RawLocalVarDescriptors;
|
|
friend class RawMirrorReference;
|
|
friend class RawObjectPool;
|
|
friend class RawPointer;
|
|
friend class RawReceivePort;
|
|
friend class RawRegExp;
|
|
friend class RawScript;
|
|
friend class RawStackTrace;
|
|
friend class RawSubtypeTestCache;
|
|
friend class RawTransferableTypedData;
|
|
friend class RawType;
|
|
friend class RawTypeArguments;
|
|
friend class RawTypeParameter;
|
|
friend class RawTypeRef;
|
|
friend class RawTypedDataView;
|
|
friend class RawUserTag;
|
|
friend class SnapshotWriterVisitor;
|
|
friend class WriteInlinedObjectVisitor;
|
|
DISALLOW_COPY_AND_ASSIGN(SnapshotWriter);
|
|
};
|
|
|
|
class SerializedObjectBuffer : public StackResource {
|
|
public:
|
|
SerializedObjectBuffer()
|
|
: StackResource(Thread::Current()), message_(nullptr) {}
|
|
|
|
void set_message(std::unique_ptr<Message> message) {
|
|
ASSERT(message_ == nullptr);
|
|
message_ = std::move(message);
|
|
}
|
|
std::unique_ptr<Message> StealMessage() { return std::move(message_); }
|
|
|
|
private:
|
|
std::unique_ptr<Message> message_;
|
|
};
|
|
|
|
class MessageWriter : public SnapshotWriter {
|
|
public:
|
|
static const intptr_t kInitialSize = 512;
|
|
explicit MessageWriter(bool can_send_any_object);
|
|
~MessageWriter();
|
|
|
|
std::unique_ptr<Message> WriteMessage(const Object& obj,
|
|
Dart_Port dest_port,
|
|
Message::Priority priority);
|
|
|
|
MessageFinalizableData* finalizable_data() const { return finalizable_data_; }
|
|
|
|
private:
|
|
ForwardList forward_list_;
|
|
MessageFinalizableData* finalizable_data_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(MessageWriter);
|
|
};
|
|
|
|
// An object pointer visitor implementation which writes out
|
|
// objects to a snap shot.
|
|
class SnapshotWriterVisitor : public ObjectPointerVisitor {
|
|
public:
|
|
SnapshotWriterVisitor(SnapshotWriter* writer, bool as_references)
|
|
: ObjectPointerVisitor(Isolate::Current()),
|
|
writer_(writer),
|
|
as_references_(as_references) {}
|
|
|
|
virtual void VisitPointers(RawObject** first, RawObject** last);
|
|
|
|
private:
|
|
SnapshotWriter* writer_;
|
|
bool as_references_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_SNAPSHOT_H_
|