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256 Commits

Author SHA1 Message Date
edef d49557a55a Require Stack to be 'static 
Our strategy of leaking the Stack to ensure safety is only effective if
the lifetime of the underlying stack memory is controlled by the
destructor of the Stack. We don't add this bound to unsafe_new, so that
users who wish to provide the necessary guarantees themselves can do so.
 2017-03-16 22:40:20 +01:00
edef 277e786d3f Panic when an unfinished Generator is dropped 2017-03-16 22:40:20 +01:00
edef 4813dd7411 Leak the stack if it's unsafe to drop it 
We can't free the stack before the generator has returned, or been
unwound. Without unwinding, the only safe course of action is to leak
it.
 2017-03-16 22:40:20 +01:00
edef 785c7b516a Add tests for Generator::unwrap 2017-03-09 07:59:55 +01:00
edef dcde4fe920 Don't use unsafe for the forget_yielded test 
Now that the Send bound is gone, we can simply use a Cell instead of a
raw pointer.
 2017-03-06 09:21:08 +01:00
edef 661872f725 Don't implement Send at all 
On hosted platforms, libstd allows safely borrowing values from TLS with
'thread lifetime and without a Sync bound. As a result, we can't
guarantee that sending a generator across threads won't create dangling
references or data races. In freestanding environments, the notion of
thread-safety is likely to be defined by the consumer of libfringe,
so our Send bounds and implementation are unlikely to be meaningful
anyway.
 2017-03-06 09:21:08 +01:00
edef 34ab0dc2cd Fix should_panic attributes 2017-02-25 14:24:36 +01:00
edef d07fcea0eb bound fail again -> bound to fail again 2016-12-02 15:27:02 -05:00
Amanieu d'Antras 74c4444a7f Inline the swap trampoline on x86_64 and AArch64 2016-11-02 00:15:15 -04:00
whitequark 243e9ffc6c Implement Eq on generator::State. 2016-10-01 18:25:32 -04:00
Amanieu d'Antras f9b6cd17f6 Allow Generator to have !Send inputs and outputs 
close #55
 2016-09-30 21:41:26 -04:00
Amanieu d'Antras fc4cdbf4f5 Clean up the stack implementations 
close #54
 2016-09-30 21:39:15 -04:00
edef 1783c25c46 Implement Send for Generator 2016-09-22 14:03:46 -04:00
edef 19ec5ef45b Make the passed Yielder borrow immutable [breaking-change] 
Yielder::suspend only requires an immutable reference, and allowing
mem::replace on the yielder isn't very useful.
 2016-09-22 14:03:46 -04:00
edef 045ad33785 Ensure that the Input/Output types outlive the generator [breaking-change] 
Previously, it was possible to cause unsafety by sending a short-lived
value into or out of the generator.
 2016-09-22 14:03:46 -04:00
edef 59f28e92cb Ensure that the closure outlives the generator [breaking-change] 
Previously, it was possible to cause unsafety by having the closure
refer to values with lifetimes that weren't enclosed by the generator's
lifetime.
 2016-09-22 14:03:46 -04:00
edef adb29eade7 Fix the variance of Input/Output 2016-09-22 13:43:34 -04:00
edef 22b16732f7 v1.2.1 2016-09-22 13:42:27 -04:00
whitequark 809215921b Unbreak or1k. 
close #53
 2016-09-22 13:41:26 -04:00
edef 84d6cef719 Add IRCCloud badge [skip-ci] 2016-09-22 13:39:32 -04:00
edef 95b7d9fd14 Set use_notice for Travis CI notifications [skip-ci] 2016-09-22 13:39:32 -04:00
edef 81d9af30fe Set skip_join for Travis CI notifications [skip-ci] 2016-09-22 13:39:32 -04:00
edef 4e55e2b651 Use PhantomData-of-tuple instead of tuple-of-PhantomData 2016-09-22 13:02:35 -04:00
edef 7efb3218c4 v1.2.0 2016-09-09 11:08:55 -04:00
edef 51282fbf7a add @Amanieu to the license file [skip ci] 2016-09-09 11:06:59 -04:00
Amanieu d'Antras 40e955638e Add support for AArch64 
close #43
 2016-09-09 10:59:35 -04:00
Amanieu d'Antras fff625767c Clean up and simplify the implementation of generators 2016-09-09 10:59:35 -04:00
Amanieu d'Antras f7f209c1eb Add proper CFI annotations to the inline asm 
This ensures that gdb is able to generate a correct backtrace when
stopped at any instruction in the inline asm.

It also makes backtraces accessible to tools that only track frame
pointer chains, like perf or dtrace.

close #49
 2016-09-09 10:59:19 -04:00
edef 0a99491f70 v1.1.0 2016-09-06 23:38:32 -04:00
whitequark 231bc3cc46 Yielder: use Cell internally to allow suspending via multiple borrows. 
The use case is as follows: let's say I have a scheduler that uses
libfringe for context switching. A single thread may open several
sockets, each of which presents a std::io::Read interface, and
waiting in Read::read requires having a reference to the yielder
inside the socket.

This could be worked around with RefCell in the API consumer, but
there is no real reason to not implement it in libfringe.

close #48
 2016-09-06 23:37:33 -04:00
edef a292648e8e v1.0.5 2016-09-04 08:05:35 -04:00
whitequark f82d0e2c21 Bring back workarounds for Mach-O assembly syntax. 2016-09-04 07:18:55 -04:00
whitequark 491af39fc9 Radically simplify stack linking. 
This commit:

  * Gets rid of 2nd init trampoline.
  * Gets rid of any custom CFI, instead using the standard CFI
    for target prologue.
  * Makes backtraces accessible to tools that only track frame
    pointer chains, like perf or dtrace.
  * Keeps the performance at the exact same level.
 2016-09-04 07:18:55 -04:00
Steve Klabnik 0ccf72fcb3 Fix link to Stack in readme 
close #46
 2016-09-04 02:59:29 -04:00
whitequark 11a6c2a658 README: mention that bare metal is supported. 2016-09-04 02:13:46 -04:00
Amanieu d'Antras b1f5b7458f Pass the new stack pointer by value into the swap trampoline 2016-09-04 02:13:46 -04:00
Amanieu d'Antras 86e29b2baa Remove unnecessary "memory" clobbers for naked function asm 2016-09-04 02:13:46 -04:00
Amanieu d'Antras 38ff4126b6 Add missing inline asm clobbers for x86 and x86_64 2016-09-04 02:13:46 -04:00
Amanieu d'Antras fb9acb73f3 Use raw pointers instead of references to avoid aliasing issues 2016-09-04 02:13:46 -04:00
whitequark c6ece101e2 Expose fringe::STACK_ALIGNMENT, and make OwnedStack respect it. 2016-09-02 19:44:34 -04:00
whitequark 0ca4bc86ff doc: explicitly state the contracts of Stack and GuardedStack. 2016-09-02 14:51:29 -04:00
whitequark 3f6c895cb7 README: explicitly list supported platforms. 2016-09-02 14:51:29 -04:00
Jonathan Soo 2f143a18dc Change README to use suspend() 
fix #37
 2016-09-02 14:45:22 -04:00
edef a60fcbfcdb v1.0.4 2016-08-31 20:25:43 -04:00
whitequark a1ea208652 arch/x86_64: hack to work around ld64 shortcomings on OS X. 
fix #35, close #36
 2016-08-31 20:25:00 -04:00
edef 49d1a24e8f v1.0.3 2016-08-31 14:25:51 -04:00
Peter Atashian 28c12a5ec5 Clarify UMS threads 
fix #32
 2016-08-31 14:24:25 -04:00
whitequark a733290359 arch: bring back clobbers for input operands. 
This reverts a part of 365e40b. While it is not legal to clobber
the output register, it is legal and necessary to do this for inputs,
since we do not preserve them, and LLVM could have decided to
reuse them.

Thanks to @Amanieu for discovering this.
 2016-08-31 14:17:54 -04:00
whitequark 248d7b16b5 arch/or1k: fix typo. 2016-08-31 14:17:54 -04:00
whitequark 4c5b0389c9 README: mention or1k support. 2016-08-31 14:17:54 -04:00