dart::compiler::ObjectPoolBuilderEntry Struct Reference

#include <object_pool_builder.h>

Public Types
enum	Patchability { kPatchable = 0 , kNotPatchable }
enum	SnapshotBehavior {   kSnapshotable , kNotSnapshotable , kResetToBootstrapNative , kResetToSwitchableCallMissEntryPoint ,   kSetToZero }
enum	EntryType { kImmediate = 0 , kTaggedObject , kNativeFunction , kImmediate128 }
using	TypeBits = BitField< uint8_t, EntryType, 0, 4 >
using	PatchableBit = BitField< uint8_t, Patchability, TypeBits::kNextBit, 1 >
using	SnapshotBehaviorBits = BitField< uint8_t, SnapshotBehavior, PatchableBit::kNextBit, 3 >

Public Member Functions
	ObjectPoolBuilderEntry ()
	ObjectPoolBuilderEntry (const Object *obj, Patchability patchable, SnapshotBehavior snapshot_behavior=kSnapshotable)
	ObjectPoolBuilderEntry (const Object *obj, const Object *eqv, Patchability patchable, SnapshotBehavior snapshot_behavior=kSnapshotable)
	ObjectPoolBuilderEntry (uword value, EntryType info, Patchability patchable, SnapshotBehavior snapshot_behavior=SnapshotBehavior::kSnapshotable)
	ObjectPoolBuilderEntry (simd128_value_t value, EntryType info, Patchability patchable)
EntryType	type () const
Patchability	patchable () const
SnapshotBehavior	snapshot_behavior () const

Static Public Member Functions
static uint8_t	EncodeTraits (EntryType type, Patchability patchable, SnapshotBehavior snapshot_behavior=SnapshotBehavior::kSnapshotable)

Public Attributes
union {
const Object *   obj_
uword   imm_
uint64_t   imm64_
simd128_value_t   imm128_
};
uint8_t	entry_bits_
const Object *	equivalence_

Detailed Description

Definition at line 23 of file object_pool_builder.h.

Member Typedef Documentation

PatchableBit

using dart::compiler::ObjectPoolBuilderEntry::PatchableBit = BitField<uint8_t, Patchability, TypeBits::kNextBit, 1>

Definition at line 66 of file object_pool_builder.h.

SnapshotBehaviorBits

using dart::compiler::ObjectPoolBuilderEntry::SnapshotBehaviorBits = BitField<uint8_t, SnapshotBehavior, PatchableBit::kNextBit, 3>

Definition at line 67 of file object_pool_builder.h.

TypeBits

using dart::compiler::ObjectPoolBuilderEntry::TypeBits = BitField<uint8_t, EntryType, 0, 4>

Definition at line 65 of file object_pool_builder.h.

Member Enumeration Documentation

EntryType

enum dart::compiler::ObjectPoolBuilderEntry::EntryType

Enumerator
kImmediate
kTaggedObject
kNativeFunction
kImmediate128

Definition at line 52 of file object_pool_builder.h.

                 {
    kImmediate = 0,
    kTaggedObject,
    kNativeFunction,
 
  // Used only during object pool building to find duplicates. Become multiple
  // kImmediate in the final pool.
#if defined(TARGET_ARCH_IS_32_BIT)
    kImmediate64,
#endif
    kImmediate128,
  };

Patchability

enum dart::compiler::ObjectPoolBuilderEntry::Patchability

Enumerator
kPatchable
kNotPatchable

Definition at line 24 of file object_pool_builder.h.

                    {
    kPatchable = 0,
    kNotPatchable,
  };

SnapshotBehavior

enum dart::compiler::ObjectPoolBuilderEntry::SnapshotBehavior

Enumerator
kSnapshotable
kNotSnapshotable
kResetToBootstrapNative
kResetToSwitchableCallMissEntryPoint
kSetToZero

Definition at line 29 of file object_pool_builder.h.

                        {
    kSnapshotable,
 
    // This should never be snapshot. Typically an memory address in the current
    // process.
    kNotSnapshotable,
 
    // Set the value to StubCode::CallBootstrapNative() on snapshot reading.
    kResetToBootstrapNative,
 
    // Only used in AOT. Every switchable call site will put (`ic_data`,
    // [kTaggedObject] `code`) into the object pool. The `code` is initialized
    // (at AOT compile-time) to be [StubCode::SwitchableCallMiss].
    //
    // The extra indirection via the `code` object is removed by storing
    // (`ic_data`, [kImmediate] `entrypoint`) in the object pool instead on
    // deserialization.
    kResetToSwitchableCallMissEntryPoint,
 
    // Set the value to 0 on snapshot writing.
    kSetToZero,
  };

Constructor & Destructor Documentation

ObjectPoolBuilderEntry() [1/5]

dart::compiler::ObjectPoolBuilderEntry::ObjectPoolBuilderEntry ( )

inline

Definition at line 79 of file object_pool_builder.h.

: imm128_(), entry_bits_(0), equivalence_() {}

ObjectPoolBuilderEntry() [2/5]

dart::compiler::ObjectPoolBuilderEntry::ObjectPoolBuilderEntry ( const Object *  obj, Patchability  patchable, SnapshotBehavior  snapshot_behavior = kSnapshotable  )

inline

Definition at line 80 of file object_pool_builder.h.

      : ObjectPoolBuilderEntry(obj, obj, patchable, snapshot_behavior) {}

ObjectPoolBuilderEntry() [3/5]

dart::compiler::ObjectPoolBuilderEntry::ObjectPoolBuilderEntry ( const Object *  obj, const Object *  eqv, Patchability  patchable, SnapshotBehavior  snapshot_behavior = kSnapshotable  )

inline

Definition at line 84 of file object_pool_builder.h.

      : obj_(obj),
        entry_bits_(EncodeTraits(kTaggedObject, patchable, snapshot_behavior)),
        equivalence_(eqv) {}

ObjectPoolBuilderEntry() [4/5]

dart::compiler::ObjectPoolBuilderEntry::ObjectPoolBuilderEntry ( uword  value, EntryType  info, Patchability  patchable, SnapshotBehavior  snapshot_behavior = SnapshotBehavior::kSnapshotable  )

inline

Definition at line 91 of file object_pool_builder.h.

      : imm_(value),
        entry_bits_(EncodeTraits(info, patchable, snapshot_behavior)),
        equivalence_() {}

ObjectPoolBuilderEntry() [5/5]

dart::compiler::ObjectPoolBuilderEntry::ObjectPoolBuilderEntry ( simd128_value_t  value, EntryType  info, Patchability  patchable  )

inline

Definition at line 105 of file object_pool_builder.h.

      : imm128_(value),
        entry_bits_(EncodeTraits(info, patchable)),
        equivalence_() {}

Member Function Documentation

EncodeTraits()

static uint8_t dart::compiler::ObjectPoolBuilderEntry::EncodeTraits ( EntryType  type, Patchability  patchable, SnapshotBehavior  snapshot_behavior = SnapshotBehavior::kSnapshotable  )

inlinestatic

Definition at line 70 of file object_pool_builder.h.

                                                                          {
    return TypeBits::encode(type) | PatchableBit::encode(patchable) |
           PatchableBit::encode(patchable) |
           SnapshotBehaviorBits::encode(snapshot_behavior);
  }

patchable()

Patchability dart::compiler::ObjectPoolBuilderEntry::patchable ( ) const

inline

Definition at line 114 of file object_pool_builder.h.

{ return PatchableBit::decode(entry_bits_); }

snapshot_behavior()

SnapshotBehavior dart::compiler::ObjectPoolBuilderEntry::snapshot_behavior ( ) const

inline

Definition at line 116 of file object_pool_builder.h.

                                             {
    return SnapshotBehaviorBits::decode(entry_bits_);
  }

type()

EntryType dart::compiler::ObjectPoolBuilderEntry::type ( ) const

inline

Definition at line 112 of file object_pool_builder.h.

{ return TypeBits::decode(entry_bits_); }

Member Data Documentation

union { ... } dart::compiler::ObjectPoolBuilderEntry::@101

entry_bits_

uint8_t dart::compiler::ObjectPoolBuilderEntry::entry_bits_

Definition at line 126 of file object_pool_builder.h.

equivalence_

const Object* dart::compiler::ObjectPoolBuilderEntry::equivalence_

Definition at line 127 of file object_pool_builder.h.

imm128_

simd128_value_t dart::compiler::ObjectPoolBuilderEntry::imm128_

Definition at line 124 of file object_pool_builder.h.

imm64_

uint64_t dart::compiler::ObjectPoolBuilderEntry::imm64_

Definition at line 123 of file object_pool_builder.h.

imm_

uword dart::compiler::ObjectPoolBuilderEntry::imm_

Definition at line 122 of file object_pool_builder.h.

obj_

const Object* dart::compiler::ObjectPoolBuilderEntry::obj_

Definition at line 121 of file object_pool_builder.h.

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The documentation for this struct was generated from the following file:

• third_party/dart-lang/sdk/runtime/vm/compiler/assembler/object_pool_builder.h