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use crate::core::BlockId;
use crate::cruby::*;
use crate::options::*;
use crate::yjit::yjit_enabled_p;
use std::fmt::{Display, Formatter};
use std::os::raw::c_long;
use crate::utils::iseq_get_location;
type Timestamp = f64;
#[derive(Clone, Debug)]
pub struct LogEntry {
/// The time when the block was compiled.
pub timestamp: Timestamp,
/// The log message.
pub message: String,
}
impl Display for LogEntry {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "{:15.6}: {}", self.timestamp, self.message)
}
}
pub type Log = CircularBuffer<LogEntry, 1024>;
static mut LOG: Option<Log> = None;
impl Log {
pub fn init() {
unsafe {
LOG = Some(Log::new());
}
}
pub fn get_instance() -> &'static mut Log {
unsafe {
LOG.as_mut().unwrap()
}
}
pub fn has_instance() -> bool {
unsafe {
LOG.as_mut().is_some()
}
}
pub fn add_block_with_chain_depth(block_id: BlockId, chain_depth: u8) {
if !Self::has_instance() {
return;
}
let print_log = get_option!(log);
let timestamp = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs_f64();
let location = iseq_get_location(block_id.iseq, block_id.idx);
let index = block_id.idx;
let message = if chain_depth > 0 {
format!("{} (index: {}, chain_depth: {})", location, index, chain_depth)
} else {
format!("{} (index: {})", location, index)
};
let entry = LogEntry {
timestamp,
message
};
if let Some(output) = print_log {
match output {
LogOutput::Stderr => {
eprintln!("{}", entry);
}
LogOutput::File(fd) => {
use std::os::unix::io::{FromRawFd, IntoRawFd};
use std::io::Write;
// Write with the fd opened during boot
let mut file = unsafe { std::fs::File::from_raw_fd(fd) };
writeln!(file, "{}", entry).unwrap();
file.flush().unwrap();
let _ = file.into_raw_fd(); // keep the fd open
}
LogOutput::MemoryOnly => () // Don't print or write anything
}
}
Self::get_instance().push(entry);
}
}
pub struct CircularBuffer<T, const N: usize> {
buffer: Vec<Option<T>>,
head: usize,
tail: usize,
size: usize
}
impl<T: Clone, const N: usize> CircularBuffer<T, N> {
pub fn new() -> Self {
Self {
buffer: vec![None; N],
head: 0,
tail: 0,
size: 0
}
}
pub fn push(&mut self, value: T) {
self.buffer[self.head] = Some(value);
self.head = (self.head + 1) % N;
if self.size == N {
self.tail = (self.tail + 1) % N;
} else {
self.size += 1;
}
}
pub fn pop(&mut self) -> Option<T> {
if self.size == 0 {
return None;
}
let value = self.buffer[self.tail].take();
self.tail = (self.tail + 1) % N;
self.size -= 1;
value
}
pub fn len(&self) -> usize {
self.size
}
}
//===========================================================================
/// Primitive called in yjit.rb
/// Check if log generation is enabled
#[no_mangle]
pub extern "C" fn rb_yjit_log_enabled_p(_ec: EcPtr, _ruby_self: VALUE) -> VALUE {
if get_option!(log).is_some() {
return Qtrue;
} else {
return Qfalse;
}
}
/// Primitive called in yjit.rb.
/// Export all YJIT log entries as a Ruby array.
#[no_mangle]
pub extern "C" fn rb_yjit_get_log(_ec: EcPtr, _ruby_self: VALUE) -> VALUE {
with_vm_lock(src_loc!(), || rb_yjit_get_log_array())
}
fn rb_yjit_get_log_array() -> VALUE {
if !yjit_enabled_p() || get_option!(log).is_none() {
return Qnil;
}
let log = Log::get_instance();
let array = unsafe { rb_ary_new_capa(log.len() as c_long) };
while log.len() > 0 {
let entry = log.pop().unwrap();
unsafe {
let entry_array = rb_ary_new_capa(2);
rb_ary_push(entry_array, rb_float_new(entry.timestamp));
rb_ary_push(entry_array, entry.message.into());
rb_ary_push(array, entry_array);
}
}
return array;
}
|
