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runtime: replace a (deliberate) memory leak with an interner.

This commit is contained in:
whitequark 2016-11-21 19:47:56 +00:00
parent ac997daf95
commit 1d1e821a74
1 changed files with 12 additions and 9 deletions
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21
artiq/runtime.rs/src/session.rs
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@ -2,6 +2,7 @@ use std::prelude::v1::*;
use std::{mem, str};
use std::cell::RefCell;
use std::io::{self, Read, Write, BufWriter};
use std::btree_set::BTreeSet;
use {config, rtio_crg, clock, mailbox, rpc_queue, kernel};
use logger::BufferLogger;
use cache::Cache;
@ -57,7 +58,8 @@ struct Session<'a> {
congress: &'a mut Congress,
kernel_state: KernelState,
watchdog_set: clock::WatchdogSet,
log_buffer: String
log_buffer: String,
interner: BTreeSet<String>
}
impl<'a> Session<'a> {
@ -66,7 +68,8 @@ impl<'a> Session<'a> {
congress: congress,
kernel_state: KernelState::Absent,
watchdog_set: clock::WatchdogSet::new(),
log_buffer: String::new()
log_buffer: String::new(),
interner: BTreeSet::new()
}
}
@ -309,20 +312,20 @@ fn process_host_message(waiter: Waiter,
}));
// FIXME: gross.
fn into_c_str(s: String) -> *const u8 {
fn into_c_str(interner: &mut BTreeSet<String>, s: String) -> *const u8 {
let s = s + "\0";
let p = s.as_bytes().as_ptr();
mem::forget(s);
interner.insert(s.clone());
let p = interner.get(&s).unwrap().as_bytes().as_ptr();
p
}
let exn = kern::Exception {
name: into_c_str(name),
message: into_c_str(message),
name: into_c_str(&mut session.interner, name),
message: into_c_str(&mut session.interner, message),
param: param,
file: into_c_str(file),
file: into_c_str(&mut session.interner, file),
line: line,
column: column,
function: into_c_str(function),
function: into_c_str(&mut session.interner, function),
phantom: ::core::marker::PhantomData
};
try!(kern_send(waiter, &kern::RpcRecvReply(Err(exn))));