cbc10fd311
cache page_size
...
page_size is used in every nearly every pointer calculation in os.rs,
and the Stack methods are called fairly often. It's definitely not worth
spilling registers for to call out to a libc function.
With this change, page_size becomes effectively free. It is cached in an
atomic usize, with relaxed ordering, so no actual atomic operations are
involved.
Benchmark:
```
test bench_page_size ... bench: 5 ns/iter (+/- 1)
test bench_page_size_cached ... bench: 0 ns/iter (+/- 0)
```
2015-04-16 05:52:56 -04:00
52c0c92cd8
move OS specifics into sys
2015-04-16 05:49:34 -04:00
2c3a203f57
rearrange the os::{Stack, StackSource} code a little
2015-04-16 05:34:09 -04:00
8dd3044da5
don't re-export os::unix internals
2015-04-16 05:34:09 -04:00
cf33440503
include valgrind.h, so we don't depend on Valgrind at build time
2015-04-16 04:32:56 -04:00
4d37f40b30
add .editorconfig
2015-04-16 04:17:55 -04:00
b8211689fa
return a Result from StackSource::get_stack with an associated Error
...
fix #7
2015-04-16 04:14:18 -04:00
42db0ee5b1
loosen the lifetime bounds on Context
...
fix #6
ref #3
2015-04-16 04:01:02 -04:00
195350863a
make Valgrind optional
2015-04-16 03:22:57 -04:00
2760a0a7aa
move Valgrind handling into Context
...
fix #3
This takes all Valgrind functionality private again.
Valgrind stack registrations are now associated with a Context, not with
a Stack. This makes sense, since it's only actually a stack when a
Context is running on it. Perhaps Valgrind will even be able to detect
early stack frees now.
2015-04-16 02:59:58 -04:00
a04117f955
use Display for displaying IoErrors
2015-04-16 02:16:08 -04:00
7e0b126f42
separate all the libc interaction out per OS
...
We're now handling more of this ourselves, and leaving less to libstd.
Hopefully, we'll eventually break free of libstd, leaving a
highly-focused low-level library that retains all its conveniences in
freestanding environments.
2015-04-16 02:16:08 -04:00
46b2a4007b
improve the assembly documentation
2015-04-16 00:22:50 -04:00
d25f43d4d5
add license headers to the assembly files
2015-04-16 00:16:23 -04:00
e6c3c36b46
line-wrap LICENSE
2015-04-16 00:13:58 -04:00
395a41d446
update LICENSE year
2015-04-16 00:12:15 -04:00
5c252bdef5
document Stack and StackSource
2015-04-15 23:38:07 -04:00
5b6aa23731
pass os::Stack addresses to Valgrind in the right order
2015-04-15 22:48:42 -04:00
04bbeb88f4
add valgrind_stack_change
...
Unlike valgrind_stack_register, this won't automatically swap
if `start > end`. It's probably wiser to pretend it doesn't swap at all.
2015-04-15 22:45:50 -04:00
476a63b817
move the Valgrind doc-comments to Rust-land, where they actually matter
2015-04-15 22:41:34 -04:00
14887b4dd0
Valgrind doesn't actually care about the order
2015-04-15 22:40:16 -04:00
9cbb2819ca
match the internal Valgrind function names to the macro names
2015-04-15 22:30:07 -04:00
db6a2ff89b
factor Valgrind support out and expose it
...
Now other Stack / StackSource implementations can use the same Valgrind
code. Ref #3 .
2015-04-15 22:25:52 -04:00
904da1a1c8
use Rust types for Valgrind, and use u32 for stack IDs
2015-04-15 22:22:02 -04:00
c19fc4625a
use a statically-allocated stack for Context::new benchmarking
...
Now it's an actual context creation benchmark, instead of benchmarking
our stack creation, which is swappable anyway.
2015-04-15 22:11:36 -04:00
7167b0b570
add Context::destroy
2015-04-15 21:54:56 -04:00
31652d7b8f
limit compilation of arch to x86_64
...
the current code only supports x86_64 (#1 ), and we want to fail hard on
any other architecture for now.
2015-04-15 21:52:08 -04:00
6d56cc593e
feature-flag os, but leave it enabled by default
2015-04-15 21:51:37 -04:00
54b34383e3
parametrise Context on Stack
2015-04-15 21:51:37 -04:00
8dc53c3125
make Context::new take a stack, instead of creating one
2015-04-15 19:35:27 -04:00
27318bc271
rename platform to os
2015-04-15 19:35:27 -04:00
5ae54da9c2
make context public
2015-04-15 19:35:27 -04:00
9855084890
make stack public
2015-04-15 19:35:27 -04:00
7aa58f43f7
add StackSource and implement it for platform::Stack
2015-04-15 19:35:27 -04:00
f7511dc2c1
add a context creation benchmark
2015-04-15 19:35:27 -04:00
f620005d0f
move the example to the examples dir
2015-04-15 19:35:27 -04:00
5c5f5095c3
move arch::{initialize_call_frame, swap} to inherent mthods of Registers
...
they're now Registers::{new, swap}, because they're
already effectively a constructor and a method.
2015-04-15 19:35:27 -04:00
67b26662c3
remove extraneous newline in LICENSE
2015-04-15 02:11:39 -04:00
ae00fa2346
document why we're not using a straigh `ret`
2015-04-15 02:06:52 -04:00
d06e7c7cdd
fix the copy impl for Registers
2015-04-15 01:23:33 -04:00
884496c6b9
document the assembly
2015-03-27 03:33:20 -04:00
a39493d740
rewrite platform.rs to use mmap directly
2015-03-27 02:52:25 -04:00
175583e335
simplify build script
2015-03-26 22:48:51 -04:00
deb452c651
that doesn't need to be mutable
2015-03-03 01:53:35 -05:00
b0dcc65304
Rust updates
2015-03-03 01:53:04 -05:00
8515bf0fa1
closure syntax changed
2015-02-23 23:14:58 -05:00
e51cfa1b7b
no_std is a feature flag now
2015-02-23 23:13:25 -05:00
a54e573073
Rust updates
2015-02-02 14:17:23 -05:00
4d815b8ec9
clean up warnings in the build script
2015-01-14 11:27:43 +01:00
3f76c4baea
use std in test configurations
...
this makes `cargo test` and `cargo bench` work cleanly, for one.
2015-01-14 11:27:43 +01:00
edef