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192 Commits

Author SHA1 Message Date
whitequark
f8cf95f686 Implement SliceStack. 2016-08-19 15:12:42 +02:00
whitequark
e0ad79ea0c Add an OR1K port. 2016-08-19 15:12:42 +02:00
whitequark
d4b7c427c9 impl Iterator for Generator<Input=()>. 2016-08-13 13:38:04 +02:00
whitequark
145c18125a Explain how trampolines work. 2016-08-13 13:38:04 +02:00
whitequark
b79e7c0a9b Rename Stack::top() to Stack::base(), which is correct. 
Fixes #25.
 2016-08-13 13:38:04 +02:00
whitequark
7d5075edc2 Add more examples to README. 
This also renames some functions for a mild increase in backtrace
clarity.
 2016-08-13 13:38:04 +02:00
whitequark
f34ddc6805 Don't use core::intrinsics. 
The core::intrinsics::unreachable() we used at the end of every naked
function is essentially pointless, as #[naked] implies that intrinsic
at the end of the function. rustc currently does not implement that
behavior (rust-lang/rust#32487), but it is a bug. On top of that,
anything except a single asm!() in naked functions is likely to be
disallowed in the future (rust-lang/rust#32490).

A nice side effect is that we avoid the core_intrinsics feature,
which will be never stabilized, though neither asm nor
naked_functions are likely to be stabilized soon.
 2016-08-13 13:38:04 +02:00
whitequark
ddbf9a5afe Reimplement Generator to pass both input and output values around. 2016-08-13 13:38:04 +02:00
whitequark
308df32ac2 Use a more semantically correct PhantomData field in Generator. 2016-08-13 13:38:04 +02:00
whitequark
302ceef10a Clarify the Windows situation. 
Also, remove the Windows OsStack implementation. It will not ever
be useful in libfringe, as even if we add support for Windows
using fibers, the OS allocates stacks for fibers and we needn't
do it manually.
 2016-08-13 13:38:04 +02:00
whitequark
a5d3430e63 Make Generator safe in presence of destructors. 2016-08-13 13:38:04 +02:00
whitequark
23cf17865d Remove workaround for rust-lang/rust#25544. 2016-08-13 13:38:04 +02:00
edef
ca43ba0498 Make fringe::Context private. 2016-08-13 13:38:04 +02:00
edef
b1a6b17d0a Move the Context tests and benches into src/ 
This concludes preparations for making Context private again.
 2016-08-13 13:38:04 +02:00
whitequark
892a7696ec Allow unwinding to propagate across a context swap. 
The main purpose of this is having nice backtraces in gdb, although
it also slightly simplifies poisoning state of the API consumers
after a panic.
 2016-08-13 13:38:04 +02:00
whitequark
40fbfdde0c Kill impl StackPointer. 
That was a silly idea for a silly abstraction, and it brought no
improvement, only confusion. So, revert it.
 2016-08-13 13:38:04 +02:00
edef
bb699c0f6e Allow inlining Generator::state 2016-08-13 12:52:12 +02:00
edef
8c761d944f Fix Windows x64 ABI 2016-07-17 16:57:23 -04:00
whitequark
15d2fbaf51 Add an inline hint on Generator::next(). 
This improves the generate benchmark by about 1ns.
 2016-07-17 13:56:03 -04:00
whitequark
16c674b4f4 Implement the GuardedStack marker trait. 2016-07-17 13:56:03 -04:00
whitequark
7ffad26cfd Implement the safe Generator abstraction. 
close #24
 2016-07-17 13:55:56 -04:00
whitequark
758088c673 Fix Stack::new(0). 2016-07-17 13:55:43 -04:00
whitequark
aa364056fd Add more documentation, and rephrase it elsewhere. 2016-07-16 20:54:47 -04:00
whitequark
ebd9ca8dec Allocate guard page under existing stack, not in it. 
This fixes a segfault when the allocated stack is just one page long.

This also refactors the fringe::os module to use Result consistently.

close #22
 2016-07-16 20:54:33 -04:00
John Ericson
75ca6f66e1 Move x86 trampoline to naked function 
Close #19
 2016-07-16 16:39:19 -04:00
John Ericson
1ea4b01eda Use mostly the same registers for consistency 
The exception to this is %eax is used not %edi on x86 because its
caller-save
 2016-07-16 16:39:14 -04:00
whitequark
cbe136b762 Completely rework fringe::Context and fringe::arch. 
The new design concerns itself with one thing and exactly one thing:
passing values back and forth with an extern "C" function.
This allows to simplify fringe::arch into a single primitive, swap.

Close #21
 2016-07-16 15:04:15 -04:00
edef
0d7b3d7091 add Windows support to OsStack 
Fix #18
 2016-04-16 07:51:10 +02:00
edef
6284a22caa add fpsr, eflags for good measure 
courtesy of @whitequark
 2016-04-16 07:41:00 +02:00
John Ericson
35fb046fb5 Factor out common code between x86 and x86_64 
Fix #17
 2016-04-14 13:37:15 +02:00
John Ericson
368fa9d3bf Remove unnecessary unsafety 2016-04-12 14:40:12 +02:00
edef
32fdbbb474 move OutStack's bound to a where clause 2016-04-03 20:07:45 +02:00
edef
daece1a8d3 Registers::{swap2 => swap}, to match Context::swap 2016-04-03 19:56:15 +02:00
edef
976b971436 get rid of the old Context::swap 
The two-parameter version is the only necessary API.
 2016-04-03 19:55:25 +02:00
edef
a50e6771b4 coerce rust_trampoline to a function pointer properly 2016-04-03 12:00:21 +02:00
edef
644cd81f9e fix parameter passing to arch/x86_64/swap.s 2016-04-03 11:59:14 +02:00
edef
3397e0bcf1 at least allow different lifetimes in Context::swap2 
Really we should allow swapping between different stack types easily, so
we can easily swap between contexts with different stack types.
 2016-03-22 08:46:27 +01:00
edef
b986931817 remove copyright years 
They're obnoxious to update, and I'm told they have no legal value.
 2016-03-22 08:25:23 +01:00
edef
709dad1c4a add Context::swap2, to allow distinct save/restore contexts 
Fix #5

Context::swap is now implemented in terms of Context::swap2, and it
might make sense to remove Context::swap entirely at some point.
 2016-03-22 07:50:50 +01:00
edef
2b23083455 get rid of some minor warnings 2016-03-22 07:35:25 +01:00
edef
4ffdba3ea6 minor style fixes 2016-03-16 00:20:45 +01:00
edef
bb2b92bf6b remove feature attributes for stable stuff 2016-03-16 00:14:09 +01:00
edef
bc46941e89 use libvalgrind instead of valgrind.h 
no more C!
 2016-01-04 15:34:41 +01:00
edef
cd4fe1ecc8 remove obsolete support for Rust stack limits 
rustc removed these in 7a3fdfbf674a08b7f6fd32c9124e52924a2f9a1c, and
this removes a Linux-specific TLS slot from our code.
 2016-01-04 03:46:07 +01:00
John Ericson
a1f286bdaf don't drop uninitialised memory when pushing to stack 2015-08-26 20:42:33 +02:00
John Ericson
96a31d2443 remove stray import 2015-08-26 20:41:12 +02:00
John Ericson
878a6fefc3 simplify Valgrind wrapper 2015-08-26 00:51:19 +02:00
John Ericson
5411f10460 use Void to ensure closure diverges 2015-08-26 00:51:18 +02:00
edef
c83143511e core::atomic -> core::sync::atomic 2015-08-26 00:20:23 +02:00
edef
e290a8bbaf remove extern crate core and prelude imports 
the latest Rust nightly makes this unnecessary
 2015-08-26 00:19:53 +02:00
edef
189edae3cf add #![feature(core_prelude)] 2015-07-20 20:54:41 -04:00
edef
6d1c5d0df1 it's fine to inline a simple FFI call 2015-04-27 17:19:13 +02:00
edef
2736479db0 fix license header 2015-04-23 01:24:58 +02:00
edef
3f0ec83bf3 remove valgrind_stack_change 
This is a leftover from when we exposed these APIs to consumers, we
don't actually use this function.
 2015-04-23 01:24:04 +02:00
edef
d0ee592ba1 use the libc crate from cargo 2015-04-23 01:14:01 +02:00
edef
418c53797e x86 support 
ref #1
 2015-04-16 13:15:46 -04:00
edef
52325b07c0 comment fix: it's 8ns *faster* 2015-04-16 12:21:39 -04:00
edef
a1e4c2b745 add Syntastic ASM lint hints 2015-04-16 11:56:45 -04:00
edef
0bebfae21d more docs! 2015-04-16 10:15:00 -04:00
edef
d627f0d725 big rename — we're libfringe now 2015-04-16 08:11:12 -04:00
edef
af7e9ea67c add FreeBSD + DragonFlyBSD MAP_STACK workaround 
http://lists.freebsd.org/pipermail/freebsd-bugs/2011-July/044840.html
according to libgreen, DragonFlyBSD suffers from this too
 2015-04-16 07:59:59 -04:00
edef
68f70fb1c9 rename Context::destroy to Context::unwrap, in line with lang conventions 2015-04-16 07:49:13 -04:00
edef
01e57ce9f5 let os::Stack's docs shine through the facade 2015-04-16 07:47:23 -04:00
edef
2266da2f8d rejig lib.rs a little 2015-04-16 07:45:14 -04:00
edef
fe490275fa move os::Stack behind the facade, to OsStack 2015-04-16 07:44:07 -04:00
edef
ff25697444 remove StackSource 
Nothing in this library took StackSources, and it's probably too
high-level a concept to include here. Maybe later.
 2015-04-16 07:42:16 -04:00
edef
bdb6e0bd8b let StackSource::get_stack take &mut self 2015-04-16 07:35:29 -04:00
edef
9bb0ce483d derive Copy and Clone for os::StackSource 2015-04-16 07:33:27 -04:00
edef
a389576d0f document os 2015-04-16 07:30:53 -04:00
edef
f3ee07416d require Stack::Error to implement Debug + Display 2015-04-16 07:27:14 -04:00
edef
cbfb62e62f only expose context and stack through the facade 
It's fairly pointless to have submodules when there are only three
items.
 2015-04-16 07:25:05 -04:00
edef
0dd6c8bc32 pass STACK_ALIGN through without exposing it 2015-04-16 07:24:15 -04:00
edef
7adb9e7381 implement Debug for all components of Context 2015-04-16 07:24:07 -04:00
edef
519d86ca4c implement Send where applicable 2015-04-16 07:23:57 -04:00
edef
7271fe1724 there is no point in Registers being Copy + Clone 2015-04-16 07:23:56 -04:00
edef
222ab0eaa9 make Context::destroy inlineable 2015-04-16 06:43:09 -04:00
edef
6f750ab484 move all OS-related code into src/os 2015-04-16 06:42:31 -04:00
edef
f7ab28de4b move all the common arch stuff into a module of its own 2015-04-16 06:34:03 -04:00
edef
b7624aa49a uintptr_t is pointless when usize is the same anyway 2015-04-16 06:20:46 -04:00
edef
997a4a7765 move architecture specifics into arch directory 2015-04-16 06:17:03 -04:00
edef
f24e8e7911 add license headers to every file 2015-04-16 06:08:44 -04:00
edef
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
edef
52c0c92cd8 move OS specifics into sys 2015-04-16 05:49:34 -04:00
edef
2c3a203f57 rearrange the os::{Stack, StackSource} code a little 2015-04-16 05:34:09 -04:00
edef
8dd3044da5 don't re-export os::unix internals 2015-04-16 05:34:09 -04:00
edef
cf33440503 include valgrind.h, so we don't depend on Valgrind at build time 2015-04-16 04:32:56 -04:00
edef
b8211689fa return a Result from StackSource::get_stack with an associated Error 
fix #7
 2015-04-16 04:14:18 -04:00
edef
42db0ee5b1 loosen the lifetime bounds on Context 
fix #6
ref #3
 2015-04-16 04:01:02 -04:00
edef
195350863a make Valgrind optional 2015-04-16 03:22:57 -04:00
edef
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
edef
a04117f955 use Display for displaying IoErrors 2015-04-16 02:16:08 -04:00
edef
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
edef
46b2a4007b improve the assembly documentation 2015-04-16 00:22:50 -04:00
edef
d25f43d4d5 add license headers to the assembly files 2015-04-16 00:16:23 -04:00
edef
5c252bdef5 document Stack and StackSource 2015-04-15 23:38:07 -04:00
edef
5b6aa23731 pass os::Stack addresses to Valgrind in the right order 2015-04-15 22:48:42 -04:00
edef
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
edef
476a63b817 move the Valgrind doc-comments to Rust-land, where they actually matter 2015-04-15 22:41:34 -04:00
edef
14887b4dd0 Valgrind doesn't actually care about the order 2015-04-15 22:40:16 -04:00
edef
9cbb2819ca match the internal Valgrind function names to the macro names 2015-04-15 22:30:07 -04:00