Repository navigation
固定 Objective-C 与 Solidity 语法候选资产 #20
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Merged
Merged
Changes from all commits
Commits
File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| //! 将固定依赖包的旧版 dylink 元数据转换成当前 Rust WasmStore 所需格式。 | ||
|
|
||
| use sha2::{Digest, Sha256}; | ||
|
|
||
| /// 仅改写固定来源 WASM 的动态链接自定义段，并验证结果摘要。 | ||
| /// 参数为语言名与原始字节；返回可由 Rust 加载的字节，不修改语法指令。 | ||
| pub fn adapt_legacy_dylink(language: &str, source: &[u8]) -> Result<Vec<u8>, String> { | ||
| let (source_sha, output_sha) = match language { | ||
| "objc" => ( | ||
| "7c1b5bfdca7e64b6c63b6040bb7ba0afc347df116f9030ca32f8535d7377f6ff", | ||
| "2606d4c5809fab61de44d328072d1371d53aa4aff5734436cb2a0ce8db7f2b0c", | ||
| ), | ||
| "solidity" => ( | ||
| "160745e470f234cae903a9ba445d19e758d0b02e1197401fc765976c6254d2b6", | ||
| "ba02ba3c98c8ce976ed962d727ef48940b3a18dd2243830a8158b558de64b4f2", | ||
| ), | ||
| _ => return Err("未知的旧版 dylink grammar".into()), | ||
| }; | ||
| if format!("{:x}", Sha256::digest(source)) != source_sha | ||
| || !source.starts_with(b"\0asm\x01\0\0\0") | ||
| { | ||
| return Err("旧版 dylink grammar 来源字节不符".into()); | ||
| } | ||
| let mut output = source[..8].to_vec(); | ||
| let mut offset = 8; | ||
| let mut converted = false; | ||
| while offset < source.len() { | ||
| let start = offset; | ||
| let id = source[offset]; | ||
| offset += 1; | ||
| let (length, payload_start) = read_leb(source, offset)?; | ||
| let end = payload_start | ||
| .checked_add(length) | ||
| .filter(|end| *end <= source.len()) | ||
| .ok_or("WASM section 越界")?; | ||
| if id == 0 { | ||
| let (name_len, name_start) = read_leb(source, payload_start)?; | ||
| let name_end = name_start | ||
| .checked_add(name_len) | ||
| .filter(|end_name| *end_name <= end) | ||
| .ok_or("WASM 自定义段名称越界")?; | ||
| if &source[name_start..name_end] == b"dylink" { | ||
| if converted { | ||
| return Err("重复 dylink 段".into()); | ||
| } | ||
| let legacy = &source[name_end..end]; | ||
| let mut position = 0; | ||
| for _ in 0..4 { | ||
| position = read_leb(legacy, position)?.1; | ||
| } | ||
| if legacy[position..].iter().any(|byte| *byte != 0) || legacy.len() != position + 1 | ||
| { | ||
| return Err("旧版 dylink 额外依赖布局不支持".into()); | ||
| } | ||
| let mut body = vec![8]; | ||
| body.extend_from_slice(b"dylink.0"); | ||
| body.push(1); | ||
| write_leb(position, &mut body); | ||
| body.extend_from_slice(&legacy[..position]); | ||
| output.push(0); | ||
| write_leb(body.len(), &mut output); | ||
| output.extend_from_slice(&body); | ||
| converted = true; | ||
| offset = end; | ||
| continue; | ||
| } | ||
| } | ||
| output.extend_from_slice(&source[start..end]); | ||
| offset = end; | ||
| } | ||
| if !converted || format!("{:x}", Sha256::digest(&output)) != output_sha { | ||
| return Err("旧版 dylink grammar 适配结果不符".into()); | ||
| } | ||
| Ok(output) | ||
| } | ||
|
|
||
| fn read_leb(bytes: &[u8], mut offset: usize) -> Result<(usize, usize), String> { | ||
| let mut value = 0usize; | ||
| for shift in (0..35).step_by(7) { | ||
| let byte = *bytes.get(offset).ok_or("WASM LEB 长度缺失")?; | ||
| offset += 1; | ||
| value |= usize::from(byte & 0x7f) << shift; | ||
| if byte & 0x80 == 0 { | ||
| return Ok((value, offset)); | ||
| } | ||
| } | ||
| Err("WASM LEB 长度无效".into()) | ||
| } | ||
|
|
||
| fn write_leb(mut value: usize, output: &mut Vec<u8>) { | ||
| loop { | ||
| let mut byte = (value & 0x7f) as u8; | ||
| value >>= 7; | ||
| if value != 0 { | ||
| byte |= 0x80; | ||
| } | ||
| output.push(byte); | ||
| if value == 0 { | ||
| break; | ||
| } | ||
| } | ||
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
In builds without
wasm-precheck,grammar statusstill callsbundled_grammar_candidates, so these unconditionalinclude_bytes!references keep both the source and adapted Objective-C/Solidity modules reachable in the normal CLI. The four files total about 15.5 MiB, meaning this ostensibly optional worker change substantially enlarges every default/native npm binary even though those builds cannot invoke__syntax-worker; gate the byte-level adaptation verification behind the feature or move it to build/test-time validation.Useful? React with 👍 / 👎.