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#![allow(non_camel_case_types)]
use rustc_data_structures::sync::Lock;
use std::cell::Cell;
use std::fmt::Debug;
use std::time::{Duration, Instant};
use syntax::symbol::{Symbol, sym};
use rustc_macros::HashStable;
use crate::session::Session;
#[cfg(test)]
mod tests;
// The name of the associated type for `Fn` return types.
pub const FN_OUTPUT_NAME: Symbol = sym::Output;
// Useful type to use with `Result<>` indicate that an error has already
// been reported to the user, so no need to continue checking.
#[derive(Clone, Copy, Debug, RustcEncodable, RustcDecodable, HashStable)]
pub struct ErrorReported;
thread_local!(static TIME_DEPTH: Cell<usize> = Cell::new(0));
#[allow(nonstandard_style)]
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct QueryMsg {
pub query: &'static str,
pub msg: Option<String>,
}
/// Read the current depth of `time()` calls. This is used to
/// encourage indentation across threads.
pub fn time_depth() -> usize {
TIME_DEPTH.with(|slot| slot.get())
}
/// Sets the current depth of `time()` calls. The idea is to call
/// `set_time_depth()` with the result from `time_depth()` in the
/// parent thread.
pub fn set_time_depth(depth: usize) {
TIME_DEPTH.with(|slot| slot.set(depth));
}
pub fn time<T, F>(sess: &Session, what: &str, f: F) -> T where
F: FnOnce() -> T,
{
time_ext(sess.time_passes(), what, f)
}
pub fn time_ext<T, F>(do_it: bool, what: &str, f: F) -> T where
F: FnOnce() -> T,
{
if !do_it { return f(); }
let old = TIME_DEPTH.with(|slot| {
let r = slot.get();
slot.set(r + 1);
r
});
let start = Instant::now();
let rv = f();
let dur = start.elapsed();
print_time_passes_entry(true, what, dur);
TIME_DEPTH.with(|slot| slot.set(old));
rv
}
pub fn print_time_passes_entry(do_it: bool, what: &str, dur: Duration) {
if !do_it {
return
}
let indentation = TIME_DEPTH.with(|slot| slot.get());
let mem_string = match get_resident() {
Some(n) => {
let mb = n as f64 / 1_000_000.0;
format!("; rss: {}MB", mb.round() as usize)
}
None => String::new(),
};
println!("{}time: {}{}\t{}",
" ".repeat(indentation),
duration_to_secs_str(dur),
mem_string,
what);
}
// Hack up our own formatting for the duration to make it easier for scripts
// to parse (always use the same number of decimal places and the same unit).
pub fn duration_to_secs_str(dur: Duration) -> String {
const NANOS_PER_SEC: f64 = 1_000_000_000.0;
let secs = dur.as_secs() as f64 +
dur.subsec_nanos() as f64 / NANOS_PER_SEC;
format!("{:.3}", secs)
}
pub fn to_readable_str(mut val: usize) -> String {
let mut groups = vec![];
loop {
let group = val % 1000;
val /= 1000;
if val == 0 {
groups.push(group.to_string());
break;
} else {
groups.push(format!("{:03}", group));
}
}
groups.reverse();
groups.join("_")
}
pub fn record_time<T, F>(accu: &Lock<Duration>, f: F) -> T where
F: FnOnce() -> T,
{
let start = Instant::now();
let rv = f();
let duration = start.elapsed();
let mut accu = accu.lock();
*accu = *accu + duration;
rv
}
// Memory reporting
#[cfg(unix)]
fn get_resident() -> Option<usize> {
use std::fs;
let field = 1;
let contents = fs::read("/proc/self/statm").ok()?;
let contents = String::from_utf8(contents).ok()?;
let s = contents.split_whitespace().nth(field)?;
let npages = s.parse::<usize>().ok()?;
Some(npages * 4096)
}
#[cfg(windows)]
fn get_resident() -> Option<usize> {
type BOOL = i32;
type DWORD = u32;
type HANDLE = *mut u8;
use libc::size_t;
use std::mem;
#[repr(C)]
#[allow(non_snake_case)]
struct PROCESS_MEMORY_COUNTERS {
cb: DWORD,
PageFaultCount: DWORD,
PeakWorkingSetSize: size_t,
WorkingSetSize: size_t,
QuotaPeakPagedPoolUsage: size_t,
QuotaPagedPoolUsage: size_t,
QuotaPeakNonPagedPoolUsage: size_t,
QuotaNonPagedPoolUsage: size_t,
PagefileUsage: size_t,
PeakPagefileUsage: size_t,
}
type PPROCESS_MEMORY_COUNTERS = *mut PROCESS_MEMORY_COUNTERS;
#[link(name = "psapi")]
extern "system" {
fn GetCurrentProcess() -> HANDLE;
fn GetProcessMemoryInfo(Process: HANDLE,
ppsmemCounters: PPROCESS_MEMORY_COUNTERS,
cb: DWORD) -> BOOL;
}
let mut pmc: PROCESS_MEMORY_COUNTERS = unsafe { mem::zeroed() };
pmc.cb = mem::size_of_val(&pmc) as DWORD;
match unsafe { GetProcessMemoryInfo(GetCurrentProcess(), &mut pmc, pmc.cb) } {
0 => None,
_ => Some(pmc.WorkingSetSize as usize),
}
}
pub fn indent<R, F>(op: F) -> R where
R: Debug,
F: FnOnce() -> R,
{
// Use in conjunction with the log post-processor like `src/etc/indenter`
// to make debug output more readable.
debug!(">>");
let r = op();
debug!("<< (Result = {:?})", r);
r
}
pub struct Indenter {
_cannot_construct_outside_of_this_module: (),
}
impl Drop for Indenter {
fn drop(&mut self) { debug!("<<"); }
}
pub fn indenter() -> Indenter {
debug!(">>");
Indenter { _cannot_construct_outside_of_this_module: () }
}
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