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Author SHA1 Message Date
edef e47cb809f4 use valgrind_request from crates.io 2016-08-30 13:43:51 -04:00
whitequark 2d8cefcabc Do not simultaneously clobber registers passed into assembly. 
This is not actually legal (although the restriction is not
documented anywhere), and is not caught by LLVM unless the codegen
option -verify-machineinstrs is specified. This option is now used
on Travis.

While not legal, this does not seem to result in invalid output
(although it creates an unnecessary spill); however, under extremely
specific circumstances (e.g. when a register scavenger is run under
severe pressure), this will result in a codegen crash, which is
how I found it.
 2016-08-30 12:20:34 -04:00
whitequark e02ef03304 Add #[derive(Debug)] for SliceStack and OwnedStack. 2016-08-30 12:20:34 -04:00
whitequark 5a77a01863 Implement OwnedStack. 2016-08-30 12:20:34 -04:00
whitequark 4b32c18f70 Rename Yielder::generate to Yielder::suspend. 
This makes more sense, because "generate" implies *running*
a generator, not *returning* from a generator. That name was
a vestige of the time when libfringe only really provided a .next()
implementation, which made marginally more sense together with
.generate(), but it doesn't anymore when we have .resume().
 2016-08-30 12:20:34 -04:00
edef f21b8dc936 Update the license headers for MIT/Apache 2016-08-20 23:45:01 +02:00
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