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d0a746ec
编写于
5月 01, 2020
作者:
R
Ralf Jung
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操作
浏览文件
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电子邮件补丁
差异文件
remove AllocId generalization of Pointer
上级
bd0bacc6
变更
5
隐藏空白更改
内联
并排
Showing
5 changed file
with
33 addition
and
39 deletion
+33
-39
src/librustc_middle/mir/interpret/pointer.rs
src/librustc_middle/mir/interpret/pointer.rs
+6
-10
src/librustc_middle/mir/interpret/value.rs
src/librustc_middle/mir/interpret/value.rs
+6
-6
src/librustc_mir/interpret/eval_context.rs
src/librustc_mir/interpret/eval_context.rs
+5
-5
src/librustc_mir/interpret/operand.rs
src/librustc_mir/interpret/operand.rs
+7
-7
src/librustc_mir/interpret/place.rs
src/librustc_mir/interpret/place.rs
+9
-11
未找到文件。
src/librustc_middle/mir/interpret/pointer.rs
浏览文件 @
d0a746ec
...
...
@@ -101,18 +101,14 @@ fn signed_offset<'tcx>(&self, val: u64, i: i64) -> InterpResult<'tcx, u64> {
impl
<
T
:
HasDataLayout
>
PointerArithmetic
for
T
{}
/// `Pointer` is generic over the type that represents a reference to `Allocation`s,
/// thus making it possible for the most convenient representation to be used in
/// each context.
/// Represents a pointer in the Miri engine.
///
/// Defaults to the index based and loosely coupled `AllocId`.
///
/// `Pointer` is also generic over the `Tag` associated with each pointer,
/// `Pointer` is generic over the `Tag` associated with each pointer,
/// which is used to do provenance tracking during execution.
#[derive(Copy,
Clone,
Eq,
PartialEq,
Ord,
PartialOrd,
RustcEncodable,
RustcDecodable,
Hash)]
#[derive(HashStable)]
pub
struct
Pointer
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
alloc_id
:
Id
,
pub
struct
Pointer
<
Tag
=
()
>
{
pub
alloc_id
:
Alloc
Id
,
pub
offset
:
Size
,
pub
tag
:
Tag
,
}
...
...
@@ -123,7 +119,7 @@ pub struct Pointer<Tag = (), Id = AllocId> {
// all the Miri types.
// We have to use `Debug` output for the tag, because `()` does not implement
// `Display` so we cannot specialize that.
impl
<
Tag
:
fmt
::
Debug
,
Id
:
fmt
::
Debug
>
fmt
::
Debug
for
Pointer
<
Tag
,
Id
>
{
impl
<
Tag
:
fmt
::
Debug
>
fmt
::
Debug
for
Pointer
<
Tag
>
{
default
fn
fmt
(
&
self
,
f
:
&
mut
fmt
::
Formatter
<
'_
>
)
->
fmt
::
Result
{
if
f
.alternate
()
{
write!
(
f
,
"{:#?}+0x{:x}[{:?}]"
,
self
.alloc_id
,
self
.offset
.bytes
(),
self
.tag
)
...
...
@@ -133,7 +129,7 @@ impl<Tag: fmt::Debug, Id: fmt::Debug> fmt::Debug for Pointer<Tag, Id> {
}
}
// Specialization for no tag
impl
<
Id
:
fmt
::
Debug
>
fmt
::
Debug
for
Pointer
<
(),
Id
>
{
impl
fmt
::
Debug
for
Pointer
<
()
>
{
fn
fmt
(
&
self
,
f
:
&
mut
fmt
::
Formatter
<
'_
>
)
->
fmt
::
Result
{
if
f
.alternate
()
{
write!
(
f
,
"{:#?}+0x{:x}"
,
self
.alloc_id
,
self
.offset
.bytes
())
...
...
src/librustc_middle/mir/interpret/value.rs
浏览文件 @
d0a746ec
...
...
@@ -89,7 +89,7 @@ pub fn from_machine_usize(i: u64, cx: &impl HasDataLayout) -> Self {
/// of a simple value or a pointer into another `Allocation`
#[derive(Clone,
Copy,
Eq,
PartialEq,
Ord,
PartialOrd,
RustcEncodable,
RustcDecodable,
Hash)]
#[derive(HashStable)]
pub
enum
Scalar
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
enum
Scalar
<
Tag
=
()
>
{
/// The raw bytes of a simple value.
Raw
{
/// The first `size` bytes of `data` are the value.
...
...
@@ -101,7 +101,7 @@ pub enum Scalar<Tag = (), Id = AllocId> {
/// A pointer into an `Allocation`. An `Allocation` in the `memory` module has a list of
/// relocations, but a `Scalar` is only large enough to contain one, so we just represent the
/// relocation and its associated offset together as a `Pointer` here.
Ptr
(
Pointer
<
Tag
,
Id
>
),
Ptr
(
Pointer
<
Tag
>
),
}
#[cfg(target_arch
=
"x86_64"
)]
...
...
@@ -109,7 +109,7 @@ pub enum Scalar<Tag = (), Id = AllocId> {
// We want the `Debug` output to be readable as it is used by `derive(Debug)` for
// all the Miri types.
impl
<
Tag
:
fmt
::
Debug
,
Id
:
fmt
::
Debug
>
fmt
::
Debug
for
Scalar
<
Tag
,
Id
>
{
impl
<
Tag
:
fmt
::
Debug
>
fmt
::
Debug
for
Scalar
<
Tag
>
{
fn
fmt
(
&
self
,
f
:
&
mut
fmt
::
Formatter
<
'_
>
)
->
fmt
::
Result
{
match
self
{
Scalar
::
Ptr
(
ptr
)
=>
write!
(
f
,
"{:?}"
,
ptr
),
...
...
@@ -542,8 +542,8 @@ fn from(ptr: Pointer<Tag>) -> Self {
}
#[derive(Clone,
Copy,
Eq,
PartialEq,
RustcEncodable,
RustcDecodable,
HashStable,
Hash)]
pub
enum
ScalarMaybeUndef
<
Tag
=
()
,
Id
=
AllocId
>
{
Scalar
(
Scalar
<
Tag
,
Id
>
),
pub
enum
ScalarMaybeUndef
<
Tag
=
()
>
{
Scalar
(
Scalar
<
Tag
>
),
Undef
,
}
...
...
@@ -563,7 +563,7 @@ fn from(s: Pointer<Tag>) -> Self {
// We want the `Debug` output to be readable as it is used by `derive(Debug)` for
// all the Miri types.
impl
<
Tag
:
fmt
::
Debug
,
Id
:
fmt
::
Debug
>
fmt
::
Debug
for
ScalarMaybeUndef
<
Tag
,
Id
>
{
impl
<
Tag
:
fmt
::
Debug
>
fmt
::
Debug
for
ScalarMaybeUndef
<
Tag
>
{
fn
fmt
(
&
self
,
f
:
&
mut
fmt
::
Formatter
<
'_
>
)
->
fmt
::
Result
{
match
self
{
ScalarMaybeUndef
::
Undef
=>
write!
(
f
,
"<uninitialized>"
),
...
...
src/librustc_mir/interpret/eval_context.rs
浏览文件 @
d0a746ec
...
...
@@ -11,7 +11,7 @@
use
rustc_middle
::
ich
::
StableHashingContext
;
use
rustc_middle
::
mir
;
use
rustc_middle
::
mir
::
interpret
::{
sign_extend
,
truncate
,
AllocId
,
FrameInfo
,
GlobalId
,
InterpResult
,
Pointer
,
Scalar
,
sign_extend
,
truncate
,
FrameInfo
,
GlobalId
,
InterpResult
,
Pointer
,
Scalar
,
};
use
rustc_middle
::
ty
::
layout
::{
self
,
TyAndLayout
};
use
rustc_middle
::
ty
::{
...
...
@@ -103,8 +103,8 @@ pub enum StackPopCleanup {
/// State of a local variable including a memoized layout
#[derive(Clone,
PartialEq,
Eq,
HashStable)]
pub
struct
LocalState
<
'tcx
,
Tag
=
()
,
Id
=
AllocId
>
{
pub
value
:
LocalValue
<
Tag
,
Id
>
,
pub
struct
LocalState
<
'tcx
,
Tag
=
()
>
{
pub
value
:
LocalValue
<
Tag
>
,
/// Don't modify if `Some`, this is only used to prevent computing the layout twice
#[stable_hasher(ignore)]
pub
layout
:
Cell
<
Option
<
TyAndLayout
<
'tcx
>>>
,
...
...
@@ -112,7 +112,7 @@ pub struct LocalState<'tcx, Tag = (), Id = AllocId> {
/// Current value of a local variable
#[derive(Copy,
Clone,
PartialEq,
Eq,
Debug,
HashStable)]
// Miri debug-prints these
pub
enum
LocalValue
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
enum
LocalValue
<
Tag
=
()
>
{
/// This local is not currently alive, and cannot be used at all.
Dead
,
/// This local is alive but not yet initialized. It can be written to
...
...
@@ -125,7 +125,7 @@ pub enum LocalValue<Tag = (), Id = AllocId> {
/// This is an optimization over just always having a pointer here;
/// we can thus avoid doing an allocation when the local just stores
/// immediate values *and* never has its address taken.
Live
(
Operand
<
Tag
,
Id
>
),
Live
(
Operand
<
Tag
>
),
}
impl
<
'tcx
,
Tag
:
Copy
+
'static
>
LocalState
<
'tcx
,
Tag
>
{
...
...
src/librustc_mir/interpret/operand.rs
浏览文件 @
d0a746ec
...
...
@@ -15,7 +15,7 @@
use
rustc_target
::
abi
::{
VariantIdx
,
Variants
};
use
super
::{
from_known_layout
,
sign_extend
,
truncate
,
AllocId
,
ConstValue
,
GlobalId
,
InterpCx
,
from_known_layout
,
sign_extend
,
truncate
,
ConstValue
,
GlobalId
,
InterpCx
,
InterpResult
,
MPlaceTy
,
Machine
,
MemPlace
,
Place
,
PlaceTy
,
Pointer
,
Scalar
,
ScalarMaybeUndef
,
};
...
...
@@ -27,9 +27,9 @@
/// In particular, thanks to `ScalarPair`, arithmetic operations and casts can be entirely
/// defined on `Immediate`, and do not have to work with a `Place`.
#[derive(Copy,
Clone,
Debug,
PartialEq,
Eq,
HashStable,
Hash)]
pub
enum
Immediate
<
Tag
=
()
,
Id
=
AllocId
>
{
Scalar
(
ScalarMaybeUndef
<
Tag
,
Id
>
),
ScalarPair
(
ScalarMaybeUndef
<
Tag
,
Id
>
,
ScalarMaybeUndef
<
Tag
,
Id
>
),
pub
enum
Immediate
<
Tag
=
()
>
{
Scalar
(
ScalarMaybeUndef
<
Tag
>
),
ScalarPair
(
ScalarMaybeUndef
<
Tag
>
,
ScalarMaybeUndef
<
Tag
>
),
}
impl
<
Tag
>
From
<
ScalarMaybeUndef
<
Tag
>>
for
Immediate
<
Tag
>
{
...
...
@@ -145,9 +145,9 @@ fn deref(&self) -> &Immediate<Tag> {
/// or still in memory. The latter is an optimization, to delay reading that chunk of
/// memory and to avoid having to store arbitrary-sized data here.
#[derive(Copy,
Clone,
Debug,
PartialEq,
Eq,
HashStable,
Hash)]
pub
enum
Operand
<
Tag
=
()
,
Id
=
AllocId
>
{
Immediate
(
Immediate
<
Tag
,
Id
>
),
Indirect
(
MemPlace
<
Tag
,
Id
>
),
pub
enum
Operand
<
Tag
=
()
>
{
Immediate
(
Immediate
<
Tag
>
),
Indirect
(
MemPlace
<
Tag
>
),
}
#[derive(Copy,
Clone,
Debug,
PartialEq,
Eq,
Hash)]
...
...
src/librustc_mir/interpret/place.rs
浏览文件 @
d0a746ec
...
...
@@ -20,9 +20,9 @@
#[derive(Copy,
Clone,
Debug,
Hash,
PartialEq,
Eq,
HashStable)]
/// Information required for the sound usage of a `MemPlace`.
pub
enum
MemPlaceMeta
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
enum
MemPlaceMeta
<
Tag
=
()
>
{
/// The unsized payload (e.g. length for slices or vtable pointer for trait objects).
Meta
(
Scalar
<
Tag
,
Id
>
),
Meta
(
Scalar
<
Tag
>
),
/// `Sized` types or unsized `extern type`
None
,
/// The address of this place may not be taken. This protects the `MemPlace` from coming from
...
...
@@ -32,8 +32,8 @@ pub enum MemPlaceMeta<Tag = (), Id = AllocId> {
Poison
,
}
impl
<
Tag
,
Id
>
MemPlaceMeta
<
Tag
,
Id
>
{
pub
fn
unwrap_meta
(
self
)
->
Scalar
<
Tag
,
Id
>
{
impl
<
Tag
>
MemPlaceMeta
<
Tag
>
{
pub
fn
unwrap_meta
(
self
)
->
Scalar
<
Tag
>
{
match
self
{
Self
::
Meta
(
s
)
=>
s
,
Self
::
None
|
Self
::
Poison
=>
{
...
...
@@ -47,9 +47,7 @@ fn has_meta(self) -> bool {
Self
::
None
|
Self
::
Poison
=>
false
,
}
}
}
impl
<
Tag
>
MemPlaceMeta
<
Tag
>
{
pub
fn
erase_tag
(
self
)
->
MemPlaceMeta
<
()
>
{
match
self
{
Self
::
Meta
(
s
)
=>
MemPlaceMeta
::
Meta
(
s
.erase_tag
()),
...
...
@@ -60,22 +58,22 @@ pub fn erase_tag(self) -> MemPlaceMeta<()> {
}
#[derive(Copy,
Clone,
Debug,
Hash,
PartialEq,
Eq,
HashStable)]
pub
struct
MemPlace
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
struct
MemPlace
<
Tag
=
()
>
{
/// A place may have an integral pointer for ZSTs, and since it might
/// be turned back into a reference before ever being dereferenced.
/// However, it may never be undef.
pub
ptr
:
Scalar
<
Tag
,
Id
>
,
pub
ptr
:
Scalar
<
Tag
>
,
pub
align
:
Align
,
/// Metadata for unsized places. Interpretation is up to the type.
/// Must not be present for sized types, but can be missing for unsized types
/// (e.g., `extern type`).
pub
meta
:
MemPlaceMeta
<
Tag
,
Id
>
,
pub
meta
:
MemPlaceMeta
<
Tag
>
,
}
#[derive(Copy,
Clone,
Debug,
Hash,
PartialEq,
Eq,
HashStable)]
pub
enum
Place
<
Tag
=
()
,
Id
=
AllocId
>
{
pub
enum
Place
<
Tag
=
()
>
{
/// A place referring to a value allocated in the `Memory` system.
Ptr
(
MemPlace
<
Tag
,
Id
>
),
Ptr
(
MemPlace
<
Tag
>
),
/// To support alloc-free locals, we are able to write directly to a local.
/// (Without that optimization, we'd just always be a `MemPlace`.)
...
...
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