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|
use ptx::{ast::PtxError, Token};
use crate::{cuda::CUmodule, log, Settings};
use std::{
collections::HashMap,
ffi::{c_void, CStr},
fs::{self, File},
io::{self, Read, Write},
path::PathBuf,
rc::Rc,
};
// This struct is the heart of CUDA state tracking, it:
// * receives calls from the probes about changes to CUDA state
// * records updates to the state change
// * writes out relevant state change and details to disk and log
pub(crate) struct StateTracker {
writer: DumpWriter,
modules: HashMap<CUmodule, Option<ParsedModule>>,
module_counter: usize,
}
impl StateTracker {
pub(crate) fn new(settings: &Settings) -> Self {
StateTracker {
writer: DumpWriter::new(settings.dump_dir.clone()),
modules: HashMap::new(),
module_counter: 0,
}
}
pub(crate) fn record_new_module_file(
&mut self,
module: CUmodule,
file_name: *const i8,
fn_logger: &mut log::FunctionLogger,
) {
let file_name = match unsafe { CStr::from_ptr(file_name) }.to_str() {
Ok(f) => f,
Err(err) => {
fn_logger.log(log::LogEntry::MalformedModulePath(err));
return;
}
};
let maybe_io_error = self.try_record_new_module_file(module, fn_logger, file_name);
fn_logger.log_io_error(maybe_io_error)
}
fn try_record_new_module_file(
&mut self,
module: CUmodule,
fn_logger: &mut log::FunctionLogger,
file_name: &str,
) -> io::Result<()> {
let mut module_file = fs::File::open(file_name)?;
let mut read_buff = Vec::new();
module_file.read_to_end(&mut read_buff)?;
self.record_new_module(module, read_buff.as_ptr() as *const _, fn_logger);
Ok(())
}
pub(crate) fn record_new_module(
&mut self,
module: CUmodule,
raw_image: *const c_void,
fn_logger: &mut log::FunctionLogger,
) {
self.module_counter += 1;
if unsafe { *(raw_image as *const [u8; 4]) } == *goblin::elf64::header::ELFMAG {
self.modules.insert(module, None);
// TODO: Parse ELF and write it to disk
fn_logger.log(log::LogEntry::UnsupportedModule {
module,
raw_image,
kind: "ELF",
})
} else if unsafe { *(raw_image as *const [u8; 8]) } == *goblin::archive::MAGIC {
self.modules.insert(module, None);
// TODO: Figure out how to get size of archive module and write it to disk
fn_logger.log(log::LogEntry::UnsupportedModule {
module,
raw_image,
kind: "archive",
})
} else {
self.record_module_ptx(module, raw_image, fn_logger)
}
}
fn record_module_ptx(
&mut self,
module: CUmodule,
raw_image: *const c_void,
fn_logger: &mut log::FunctionLogger,
) {
let module_text = unsafe { CStr::from_ptr(raw_image as *const _) }.to_str();
let module_text = match module_text {
Ok(m) => m,
Err(utf8_err) => {
fn_logger.log(log::LogEntry::MalformedModuleText(utf8_err));
return;
}
};
fn_logger.log_io_error(self.writer.save_module(self.module_counter, module_text));
let mut errors = Vec::new();
let ast = ptx::ModuleParser::new().parse(&mut errors, module_text);
let ast = match (&*errors, ast) {
(&[], Ok(ast)) => ast,
(err_vec, res) => {
fn_logger.log(log::LogEntry::ModuleParsingError(self.module_counter));
fn_logger.log_io_error(self.writer.save_module_error_log(
self.module_counter,
err_vec,
res.err(),
));
return;
}
};
// TODO: store kernel names and details
}
}
struct ParsedModule {
content: Rc<String>,
kernels_args: Option<HashMap<String, Vec<usize>>>,
}
// This structs writes out information about CUDA execution to the dump dir
struct DumpWriter {
dump_dir: Option<PathBuf>,
}
impl DumpWriter {
fn new(dump_dir: Option<PathBuf>) -> Self {
Self { dump_dir }
}
fn save_module(&self, index: usize, text: &str) -> io::Result<()> {
let mut dump_file = match &self.dump_dir {
None => return Ok(()),
Some(d) => d.clone(),
};
dump_file.push(format!("module_{:04}.ptx", index));
let mut file = File::create(dump_file)?;
file.write_all(text.as_bytes())?;
Ok(())
}
fn save_module_error_log<'input>(
&self,
index: usize,
recoverable: &[ptx::ParseError<usize, Token<'input>, PtxError>],
unrecoverable: Option<ptx::ParseError<usize, Token<'input>, PtxError>>,
) -> io::Result<()> {
let mut log_file = match &self.dump_dir {
None => return Ok(()),
Some(d) => d.clone(),
};
log_file.push(format!("module_{:04}.log", index));
let mut file = File::create(log_file)?;
for err in unrecoverable.iter().chain(recoverable.iter()) {
writeln!(file, "{}", err)?;
}
Ok(())
}
}
|
