ROX-36673: Allow instructions with multiple arguments - #62
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 SummarySummary by CodeRabbit
WalkthroughThe script grammar and rule application prepare task arguments. Runtime code generation passes variable-length argument vectors, supports ChangesTask argument execution
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to Dynamic helpers now require parenthesized arguments while still supporting empty argument lists, with no remaining merge-readiness risk identified. Sequence Diagram(s)sequenceDiagram
participant ScriptParser
participant apply_work_rules
participant jit_instruction
participant random_string
participant task
participant Process
ScriptParser->>apply_work_rules: parse and normalize task arguments
apply_work_rules->>jit_instruction: pass argument vector
jit_instruction->>random_string: generate string argument
random_string-->>jit_instruction: return string pointer
jit_instruction->>task: pass task name and arguments
task->>Process: execute command
Process-->>task: return exit code
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 4 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 5
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Inline comments:
In `@src/script/grammar.peg`:
- Line 20: Update the dynamic helper parsing around dynamicName so randomPath
and randomString only match when their names are not followed by an identifier
character, preventing prefixed names such as random_string_value from being
partially consumed while preserving valid helper calls.
In `@src/script/rules.rs`:
- Around line 14-15: Update apply_task_rules and the JIT task argument handling
so task(stub) preserves zero arguments instead of creating an empty Arg::Const
that becomes a child argument; if the ABI requires a placeholder, carry an
explicit argument count and ensure Command::args receives no arguments.
In `@src/worker/script.rs`:
- Line 125: Update the argument construction in the task process invocation to
use whitespace-aware splitting instead of splitting on a literal space, so an
empty normalized task produces no process arguments while preserving parsing of
non-empty arguments.
- Around line 460-464: Update the true and false constants registered by
ScriptWorker::new so Arg::Var values match the pointer-width type expected by
runtime calls such as RUNTIME["debug"], or introduce a boolean runtime type that
rejects booleans for pointer-only helpers; preserve correct boolean semantics
while preventing i1 arguments from being passed as iptr parameters.
- Around line 489-491: Update ScriptWorker::jit_instruction and the
RUNTIME["task"] declaration so task calls support the full
Instruction::Task.args vector without passing more operands than the callee
accepts; adopt an ABI with an explicit argument count and pointer array, or
consolidate arguments into a single supported representation, while preserving
single-argument task behavior.
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src/main.rssrc/script/ast.rssrc/script/grammar.pegsrc/script/rules.rssrc/worker/script.rsworkloads/example.berworkloads/example.short.ber
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Inline comments:
In `@src/worker/script.rs`:
- Line 277: Update the call-building logic around into_raw_parts so the LLVM
argument values remain in a local Vec while LLVMBuildCall2 executes, passing
that vector’s pointer and length without transferring ownership or leaking its
allocation.
- Around line 318-319: Validate the dynamic helper argument count before
constructing the LLVM call in the helper-call flow around get_arg_value and
LLVMBuildCall2. Compare args.len() with the fixed RuntimeFunc::param_count,
reject mismatches such as random_string receiving an argument, and only build
the call when the arity is valid.
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src/worker/script.rs
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Introduce infrastructure to use multiple arguments in instructions. Pass them as a vector to the helper function. Apply this infrastructure for task instruction to allow differentiate tasks with random arguments. Instead of passing a flag, allow to pass a task argument as it is, and introduce another helper random_string. Along the way allow to have helpers without arguments.
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Inline comments:
In `@src/main.rs`:
- Around line 308-310: Update the test around new_script_worker and run_payload
to verify that the argument produced by random_string() reaches stub, rather
than only asserting successful completion. Make stub expose or record its
received argument, then assert it matches the generated value while preserving
the existing success check.
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src/main.rssrc/worker/script.rs
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- src/worker/script.rs
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Mark `args` rule non-optional in dynamic variables, since it will enforce parethnesis, while still having optional arguments inside. Add `_` to the constants.
Molter73
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Molter73
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LGTM! Just a few comments but nothing that should prevent merging.
| #[derive(Debug, Clone, PartialEq)] | ||
| pub enum Arg { | ||
| /// Null constant | ||
| Null {}, |
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Rust allows empty variants, like None.
| Null {}, | |
| Null, |
| if !args.is_null() { | ||
| let args = unsafe { CStr::from_ptr(args) }; | ||
| debug!("Task {:?} {:?}", name, args); | ||
|
|
||
| task.args(args.to_str().unwrap().split(' ')); | ||
| } else { | ||
| debug!("Task {:?}, null", name); | ||
| } |
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If you change .split(' ') to .split_whitespace() you should be able to simplify this a bit to something like:
let args = if !args.is_null() {
unsafe { CStr::from_ptr(args) }
} else {
c""
};
let task = Command::new(name.to_str().unwrap())
.args(args.to_str().unwrap().split_whitespace())
.status()
.expect("Failed to execute task");This would work because split_whitespace() returns no elements when the string is empty and .args() will immediately return on an iterator that returns no elements without changing the command.
| @@ -256,16 +292,30 @@ impl ScriptWorker { | |||
| ctx.builder, | |||
| *func_type, | |||
| *func, | |||
| &mut arg_ptr, | |||
| 1, | |||
| args_ref, | |||
| args_len.try_into().unwrap(), | |||
| name.as_ptr() as *const _, | |||
| ); | |||
|
|
|||
| let _ = Vec::from_raw_parts(args_ref, args_len, args_cap); | |||
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Since the vector is immediately reconstructed before returning, your probably safe to not disassemble it in the first place, something like this should work:
fn jit_instruction(name: &CStr, args: Vec<Arg>, ctx: &BuildContext) {
let mut args = args
.iter()
.map(|a| Self::get_arg_value(a.clone(), ctx))
.collect::<Vec<_>>();
let (func, func_type) = ctx
.module_runtime
.get(name.to_str().expect("Couldn't convert name to string"))
.unwrap();
unsafe {
LLVMBuildCall2(
ctx.builder,
*func_type,
*func,
args.as_mut_ptr(),
args.len() as u32,
name.as_ptr() as *const _,
);
}
}| let (args_ref, args_len, args_cap) = args | ||
| .iter() | ||
| .map(|a| Self::get_arg_value(a.clone(), ctx)) | ||
| .collect::<Vec<_>>() | ||
| .into_raw_parts(); |
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Same as my previous comment, we can probably keep the vector here as well.
2 participants
Introduce infrastructure to use multiple arguments in instructions. Pass them as a vector to the helper function.
Apply this infrastructure for task instruction to allow differentiate tasks with random arguments. Instead of passing a flag, allow to pass a task argument as it is, and introduce another helper random_string. Along the way allow to have helpers without arguments.