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// This file is part of Gear.
// Copyright (C) 2024 Gear Technologies Inc.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//! Module for instrumented code.
use crate::{
code::CodeAndId,
ids::CodeId,
message::DispatchKind,
pages::{WasmPage, WasmPagesAmount},
};
use alloc::{collections::BTreeSet, vec::Vec};
use scale_info::{
scale::{Decode, Encode},
TypeInfo,
};
/// The newtype contains the instrumented code and the corresponding id (hash).
#[derive(Clone, Debug, Decode, Encode, TypeInfo)]
pub struct InstrumentedCode {
pub(crate) code: Vec<u8>,
pub(crate) original_code_len: u32,
pub(crate) exports: BTreeSet<DispatchKind>,
pub(crate) static_pages: WasmPagesAmount,
pub(crate) stack_end: Option<WasmPage>,
pub(crate) version: u32,
}
impl InstrumentedCode {
/// Creates a new instance of the instrumented code.
///
/// # Safety
/// The caller must ensure that the `code` is a valid wasm binary,
/// and other parameters are valid and suitable for the wasm binary.
pub unsafe fn new_unchecked(
code: Vec<u8>,
original_code_len: u32,
exports: BTreeSet<DispatchKind>,
static_pages: WasmPagesAmount,
stack_end: Option<WasmPage>,
version: u32,
) -> Self {
Self {
code,
original_code_len,
exports,
static_pages,
stack_end,
version,
}
}
/// Returns reference to the instrumented binary code.
pub fn code(&self) -> &[u8] {
&self.code
}
/// Returns the length of the original binary code.
pub fn original_code_len(&self) -> u32 {
self.original_code_len
}
/// Returns instruction weights version.
pub fn instruction_weights_version(&self) -> u32 {
self.version
}
/// Returns wasm module exports.
pub fn exports(&self) -> &BTreeSet<DispatchKind> {
&self.exports
}
/// Returns initial memory size from memory import.
pub fn static_pages(&self) -> WasmPagesAmount {
self.static_pages
}
/// Returns stack end page if exists.
pub fn stack_end(&self) -> Option<WasmPage> {
self.stack_end
}
/// Consumes the instance and returns the instrumented code.
pub fn into_code(self) -> Vec<u8> {
self.code
}
}
/// The newtype contains the instrumented code and the corresponding id (hash).
#[derive(Clone, Debug)]
pub struct InstrumentedCodeAndId {
code: InstrumentedCode,
code_id: CodeId,
}
impl InstrumentedCodeAndId {
/// Returns reference to the instrumented code.
pub fn code(&self) -> &InstrumentedCode {
&self.code
}
/// Returns corresponding id (hash) for the code.
pub fn code_id(&self) -> CodeId {
self.code_id
}
/// Consumes the instance and returns the instrumented code.
pub fn into_parts(self) -> (InstrumentedCode, CodeId) {
(self.code, self.code_id)
}
}
impl From<CodeAndId> for InstrumentedCodeAndId {
fn from(code_and_id: CodeAndId) -> Self {
let (code, code_id) = code_and_id.into_parts();
let (code, _) = code.into_parts();
Self { code, code_id }
}
}