1 unstable release

Uses old Rust 2015

0.1.0 Apr 6, 2018

#22 in #allocations

MIT license

6KB
116 lines

Tracing allocator for Rust

This project allows you to log all the allocations to a file.

To include it in your project, initialize the library with a file like this:

#![feature(global_allocator)]

extern crate tracing_allocator;

use std::fs::File;

#[global_allocator]
static GLOBAL: tracing_allocator::Allocator = tracing_allocator::Allocator{};

fn main() {
  let f = File::create("trace.txt").unwrap();
  tracing_allocator::Allocator::initialize(&f);
  tracing_allocator::Allocator::activate();

  let s = String::from("Hello world!");

  let mut v = Vec::new();
  v.push(1);

The trace.txt file will then have the following content:

00029801ACDA259B A 00007FB780500000 000000000000000C
00029801ACDB7EFB A 00007FB780500010 0000000000000010
00029801ACDBAAC1 D 00007FB780500010 0000000000000010
00029801ACDBCD09 D 00007FB780500000 000000000000000C

Columns:

  • time (monotonic, so not linked to any timezone)
  • A for allocation, D for deallocation
  • memory address
  • size

You can use the activate and deactivate methods to start and stop collection at any time.

Dependencies

~0.6–1MB
~15K SLoC