Trait wasmtime_environ::wasm::FuncEnvironment [−][src]
Environment affecting the translation of a single WebAssembly function.
A FuncEnvironment
trait object is required to translate a WebAssembly function to Cranelift
IR. The function environment provides information about the WebAssembly module as well as the
runtime environment.
Required methods
pub fn make_global(
&mut self,
func: &mut Function,
index: GlobalIndex
) -> Result<GlobalVariable, WasmError>
[src]
&mut self,
func: &mut Function,
index: GlobalIndex
) -> Result<GlobalVariable, WasmError>
Set up the necessary preamble definitions in func
to access the global variable
identified by index
.
The index space covers both imported globals and globals defined by the module.
Return the global variable reference that should be used to access the global and the WebAssembly type of the global.
pub fn make_heap(
&mut self,
func: &mut Function,
index: MemoryIndex
) -> Result<Heap, WasmError>
[src]
&mut self,
func: &mut Function,
index: MemoryIndex
) -> Result<Heap, WasmError>
Set up the necessary preamble definitions in func
to access the linear memory identified
by index
.
The index space covers both imported and locally declared memories.
pub fn make_table(
&mut self,
func: &mut Function,
index: TableIndex
) -> Result<Table, WasmError>
[src]
&mut self,
func: &mut Function,
index: TableIndex
) -> Result<Table, WasmError>
Set up the necessary preamble definitions in func
to access the table identified
by index
.
The index space covers both imported and locally declared tables.
pub fn make_indirect_sig(
&mut self,
func: &mut Function,
index: TypeIndex
) -> Result<SigRef, WasmError>
[src]
&mut self,
func: &mut Function,
index: TypeIndex
) -> Result<SigRef, WasmError>
Set up a signature definition in the preamble of func
that can be used for an indirect
call with signature index
.
The signature may contain additional arguments needed for an indirect call, but the
arguments marked as ArgumentPurpose::Normal
must correspond to the WebAssembly signature
arguments.
The signature will only be used for indirect calls, even if the module has direct function calls with the same WebAssembly type.
pub fn make_direct_func(
&mut self,
func: &mut Function,
index: FuncIndex
) -> Result<FuncRef, WasmError>
[src]
&mut self,
func: &mut Function,
index: FuncIndex
) -> Result<FuncRef, WasmError>
Set up an external function definition in the preamble of func
that can be used to
directly call the function index
.
The index space covers both imported functions and functions defined in the current module.
The function’s signature may contain additional arguments needed for a direct call, but the
arguments marked as ArgumentPurpose::Normal
must correspond to the WebAssembly signature
arguments.
The function’s signature will only be used for direct calls, even if the module has indirect calls with the same WebAssembly type.
pub fn translate_call_indirect(
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
table: Table,
sig_index: TypeIndex,
sig_ref: SigRef,
callee: Value,
call_args: &[Value]
) -> Result<Inst, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
table: Table,
sig_index: TypeIndex,
sig_ref: SigRef,
callee: Value,
call_args: &[Value]
) -> Result<Inst, WasmError>
Translate a call_indirect
WebAssembly instruction at pos
.
Insert instructions at pos
for an indirect call to the function callee
in the table
table_index
with WebAssembly signature sig_index
. The callee
value will have type
i32
.
The signature sig_ref
was previously created by make_indirect_sig()
.
Return the call instruction whose results are the WebAssembly return values.
pub fn translate_memory_grow(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
val: Value
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
val: Value
) -> Result<Value, WasmError>
Translate a memory.grow
WebAssembly instruction.
The index
provided identifies the linear memory to grow, and heap
is the heap reference
returned by make_heap
for the same index.
The val
value is the requested memory size in pages.
Returns the old size (in pages) of the memory.
pub fn translate_memory_size(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap
) -> Result<Value, WasmError>
Translates a memory.size
WebAssembly instruction.
The index
provided identifies the linear memory to query, and heap
is the heap reference
returned by make_heap
for the same index.
Returns the size in pages of the memory.
pub fn translate_memory_copy(
&mut self,
pos: FuncCursor<'_>,
src_index: MemoryIndex,
src_heap: Heap,
dst_index: MemoryIndex,
dst_heap: Heap,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
src_index: MemoryIndex,
src_heap: Heap,
dst_index: MemoryIndex,
dst_heap: Heap,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
Translate a memory.copy
WebAssembly instruction.
The index
provided identifies the linear memory to query, and heap
is the heap reference
returned by make_heap
for the same index.
pub fn translate_memory_fill(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
dst: Value,
val: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
dst: Value,
val: Value,
len: Value
) -> Result<(), WasmError>
Translate a memory.fill
WebAssembly instruction.
The index
provided identifies the linear memory to query, and heap
is the heap reference
returned by make_heap
for the same index.
pub fn translate_memory_init(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
seg_index: u32,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
seg_index: u32,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
Translate a memory.init
WebAssembly instruction.
The index
provided identifies the linear memory to query, and heap
is the heap reference
returned by make_heap
for the same index. seg_index
is the index of the segment to copy
from.
pub fn translate_data_drop(
&mut self,
pos: FuncCursor<'_>,
seg_index: u32
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
seg_index: u32
) -> Result<(), WasmError>
Translate a data.drop
WebAssembly instruction.
pub fn translate_table_size(
&mut self,
pos: FuncCursor<'_>,
index: TableIndex,
table: Table
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: TableIndex,
table: Table
) -> Result<Value, WasmError>
Translate a table.size
WebAssembly instruction.
pub fn translate_table_grow(
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
table: Table,
delta: Value,
init_value: Value
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
table: Table,
delta: Value,
init_value: Value
) -> Result<Value, WasmError>
Translate a table.grow
WebAssembly instruction.
pub fn translate_table_get(
&mut self,
builder: &mut FunctionBuilder<'_>,
table_index: TableIndex,
table: Table,
index: Value
) -> Result<Value, WasmError>
[src]
&mut self,
builder: &mut FunctionBuilder<'_>,
table_index: TableIndex,
table: Table,
index: Value
) -> Result<Value, WasmError>
Translate a table.get
WebAssembly instruction.
pub fn translate_table_set(
&mut self,
builder: &mut FunctionBuilder<'_>,
table_index: TableIndex,
table: Table,
value: Value,
index: Value
) -> Result<(), WasmError>
[src]
&mut self,
builder: &mut FunctionBuilder<'_>,
table_index: TableIndex,
table: Table,
value: Value,
index: Value
) -> Result<(), WasmError>
Translate a table.set
WebAssembly instruction.
pub fn translate_table_copy(
&mut self,
pos: FuncCursor<'_>,
dst_table_index: TableIndex,
dst_table: Table,
src_table_index: TableIndex,
src_table: Table,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
dst_table_index: TableIndex,
dst_table: Table,
src_table_index: TableIndex,
src_table: Table,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
Translate a table.copy
WebAssembly instruction.
pub fn translate_table_fill(
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
dst: Value,
val: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
table_index: TableIndex,
dst: Value,
val: Value,
len: Value
) -> Result<(), WasmError>
Translate a table.fill
WebAssembly instruction.
pub fn translate_table_init(
&mut self,
pos: FuncCursor<'_>,
seg_index: u32,
table_index: TableIndex,
table: Table,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
seg_index: u32,
table_index: TableIndex,
table: Table,
dst: Value,
src: Value,
len: Value
) -> Result<(), WasmError>
Translate a table.init
WebAssembly instruction.
pub fn translate_elem_drop(
&mut self,
pos: FuncCursor<'_>,
seg_index: u32
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
seg_index: u32
) -> Result<(), WasmError>
Translate a elem.drop
WebAssembly instruction.
pub fn translate_ref_func(
&mut self,
pos: FuncCursor<'_>,
func_index: FuncIndex
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
func_index: FuncIndex
) -> Result<Value, WasmError>
Translate a ref.func
WebAssembly instruction.
pub fn translate_custom_global_get(
&mut self,
pos: FuncCursor<'_>,
global_index: GlobalIndex
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
global_index: GlobalIndex
) -> Result<Value, WasmError>
Translate a global.get
WebAssembly instruction at pos
for a global
that is custom.
pub fn translate_custom_global_set(
&mut self,
pos: FuncCursor<'_>,
global_index: GlobalIndex,
val: Value
) -> Result<(), WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
global_index: GlobalIndex,
val: Value
) -> Result<(), WasmError>
Translate a global.set
WebAssembly instruction at pos
for a global
that is custom.
pub fn translate_atomic_wait(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
addr: Value,
expected: Value,
timeout: Value
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
addr: Value,
expected: Value,
timeout: Value
) -> Result<Value, WasmError>
Translate an i32.atomic.wait
or i64.atomic.wait
WebAssembly instruction.
The index
provided identifies the linear memory containing the value
to wait on, and heap
is the heap reference returned by make_heap
for the same index. Whether the waited-on value is 32- or 64-bit can be
determined by examining the type of expected
, which must be only I32 or I64.
Returns an i32, which is negative if the helper call failed.
pub fn translate_atomic_notify(
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
addr: Value,
count: Value
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
index: MemoryIndex,
heap: Heap,
addr: Value,
count: Value
) -> Result<Value, WasmError>
Translate an atomic.notify
WebAssembly instruction.
The index
provided identifies the linear memory containing the value
to wait on, and heap
is the heap reference returned by make_heap
for the same index.
Returns an i64, which is negative if the helper call failed.
Provided methods
pub fn is_wasm_parameter(&self, signature: &Signature, index: usize) -> bool
[src]
Is the given parameter of the given function a wasm-level parameter, as opposed to a hidden parameter added for use by the implementation?
pub fn is_wasm_return(&self, signature: &Signature, index: usize) -> bool
[src]
Is the given return of the given function a wasm-level parameter, as opposed to a hidden parameter added for use by the implementation?
pub fn return_mode(&self) -> ReturnMode
[src]
Should the code be structured to use a single fallthrough_return
instruction at the end
of the function body, rather than return
instructions as needed? This is used by VMs
to append custom epilogues.
pub fn translate_call(
&mut self,
pos: FuncCursor<'_>,
_callee_index: FuncIndex,
callee: FuncRef,
call_args: &[Value]
) -> Result<Inst, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
_callee_index: FuncIndex,
callee: FuncRef,
call_args: &[Value]
) -> Result<Inst, WasmError>
Translate a call
WebAssembly instruction at pos
.
Insert instructions at pos
for a direct call to the function callee_index
.
The function reference callee
was previously created by make_direct_func()
.
Return the call instruction whose results are the WebAssembly return values.
pub fn translate_ref_null(
&mut self,
pos: FuncCursor<'_>,
ty: WasmType
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
ty: WasmType
) -> Result<Value, WasmError>
Translate a ref.null T
WebAssembly instruction.
By default, translates into a null reference type.
Override this if you don’t use Cranelift reference types for all Wasm
reference types (e.g. you use a raw pointer for funcref
s) or if the
null sentinel is not a null reference type pointer for your type. If you
override this method, then you should also override
translate_ref_is_null
as well.
pub fn translate_ref_is_null(
&mut self,
pos: FuncCursor<'_>,
value: Value
) -> Result<Value, WasmError>
[src]
&mut self,
pos: FuncCursor<'_>,
value: Value
) -> Result<Value, WasmError>
Translate a ref.is_null
WebAssembly instruction.
By default, assumes that value
is a Cranelift reference type, and that
a null Cranelift reference type is the null value for all Wasm reference
types.
If you override this method, you probably also want to override
translate_ref_null
as well.
pub fn translate_loop_header(
&mut self,
_pos: FuncCursor<'_>
) -> Result<(), WasmError>
[src]
&mut self,
_pos: FuncCursor<'_>
) -> Result<(), WasmError>
Emit code at the beginning of every wasm loop.
This can be used to insert explicit interrupt or safepoint checking at the beginnings of loops.
pub fn before_translate_operator(
&mut self,
_op: &Operator<'_>,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
[src]
&mut self,
_op: &Operator<'_>,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
Optional callback for the FunctionEnvironment
performing this translation to maintain
internal state or prepare custom state for the operator to translate
pub fn after_translate_operator(
&mut self,
_op: &Operator<'_>,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
[src]
&mut self,
_op: &Operator<'_>,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
Optional callback for the FunctionEnvironment
performing this translation to maintain
internal state or finalize custom state for the operator that was translated
pub fn before_translate_function(
&mut self,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
[src]
&mut self,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
Optional callback for the FunctionEnvironment
performing this translation to perform work
before the function body is translated.
pub fn after_translate_function(
&mut self,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
[src]
&mut self,
_builder: &mut FunctionBuilder<'_>,
_state: &FuncTranslationState
) -> Result<(), WasmError>
Optional callback for the FunctionEnvironment
performing this translation to perform work
after the function body is translated.