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165 Commits

Author SHA1 Message Date
Brian Anderson
d5e7f0d113 rt: Don't kill tasks while they are in a callback from C 2012-02-14 11:24:09 -08:00
Brian Anderson
a393fb3221 rt: Maintain stack ptrs correctly when returning from stack switches 2012-02-14 11:24:09 -08:00
Brian Anderson
d493438c98 rt: Disable some expensive asserts 2012-02-09 22:58:40 -08:00
Brian Anderson
d90a9d3da0 rt: Inline everything on the C-stack-switching path 2012-02-09 22:15:15 -08:00
Brian Anderson
5d2442d89c rt: Add upcall_call_shim_on_rust_stack 2012-02-09 19:00:16 -08:00
Brian Anderson
79b1563abb rt: Use rust_task_thread's C-stack pool for native calls 2012-02-09 19:00:16 -08:00
Brian Anderson
ea76d3f454 rt: Add rust_task::call_on_c_stack 2012-02-09 19:00:16 -08:00
Brian Anderson
b98df86c09 rt: Move some stack manipulation functions into rust_task 2012-02-09 19:00:15 -08:00
Brian Anderson
4bd8f8d936 rt: Rename new_stack to next_stack, del_stack to prev_stack 2012-02-09 19:00:15 -08:00
Brian Anderson
889a783494 rt: Remove rust_task::rust_sp 2012-02-09 19:00:15 -08:00
Brian Anderson
d39ea47746 rt: Remove rust_task_user struct 2012-02-09 19:00:15 -08:00
Brian Anderson
d756b01619 rt: Add a function for configuring task notification 2012-02-09 19:00:15 -08:00
Brian Anderson
e0d5b92b84 rt: Begin moving stack-building functions to rust_stack.cpp 2012-02-09 19:00:15 -08:00
Brian Anderson
028af5cb6c rt: Change the lifecycle of tasks and schedulers for various reasons 
This is in preparation for giving schedulers their own life cycle separate
from the kernel.

Tasks must be deleted before their scheduler thread, so we can't let the
scheduler exit before all its tasks have been cleaned up. In this scheme,
the scheduler will unregister tasks with the kernel when they are reaped,
then drop their ref on the task (there may still be others). When the task
ref count hits zero, the task will request to be unregistered from the
scheduler, which is responsible for deleting the task.

Instead of having the kernel tell the scheduler to exit, let the scheduler
decide when to exit. For now it will exit when all of its tasks are
unregistered.
 2012-02-08 15:42:51 -08:00
Brian Anderson
3d0e7a7af3 rt: Add a field to rust_task to hold its scheduler 2012-02-03 23:48:12 -08:00
Brian Anderson
f94339cc1c rt: Rename rust_scheduler to rust_task_thread 2012-02-03 23:48:12 -08:00
Marijn Haverbeke
c1b075d042 Remove experimental GC code 
It's been sitting unused long enough to have bitrotted completely.
 2012-02-03 11:34:12 +01:00
Brian Anderson
3978fbff8b rt: Remove rust_task::can_schedule. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
ed3a5ad5ad rt: Remove running_on flag. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
57cad61353 rt: Remove task pinning. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
18de0f2aeb rt: Rename task_sleep intrinsic to task_yield. Remove usec param 2012-02-02 18:10:24 -08:00
Brian Anderson
8693fcc2d7 rt: Remove yield timers 2012-02-02 18:10:24 -08:00
Niko Matsakis
196d69beb2 make boxes self-describing (fixes #1493)" (take 2) 
this will be used to generate a new snapshot.
 2012-02-01 18:52:08 -08:00
Niko Matsakis
3116643806 Revert "make boxes self-describing (fixes #1493)" until a new 
snapshot is prepared.
 2012-02-01 18:50:19 -08:00
Niko Matsakis
c36207bfb8 make boxes self-describing (fixes #1493) 2012-02-01 18:18:07 -08:00
Brian Anderson
6548cdd59b rt: Make the initial segment of the main task's stack 1MB 
This is a trick to fool microbenchmarks. Closes #1681
 2012-01-29 21:20:39 -08:00
Brian Anderson
94c389a25b rt: Add RUST_MAX_STACK env var with 8MB default 
Closes #1489
 2012-01-11 13:57:11 -08:00
Niko Matsakis
110c3ccdca add rust_task_is_unwinding predicate and do not kill if already unwinding 2012-01-09 19:53:32 -08:00
Niko Matsakis
8506241f3a fix how we walk functions to match new closure fmt 2012-01-06 22:40:31 -08:00
Niko Matsakis
25e81e34ea rewrite task tests 2012-01-06 22:40:31 -08:00
Niko Matsakis
98f5109cde simplify task impl 2012-01-06 22:40:31 -08:00
Brian Anderson
dedfef4c4c Revert "wip" 
This reverts commit aeadc6269e.
 2011-12-20 20:57:04 -08:00
Brian Anderson
aeadc6269e wip 2011-12-20 20:15:09 -08:00
Brian Anderson
128621be97 rt: Remove rust_task::grow. Obsolete 2011-12-20 20:02:57 -08:00
Brian Anderson
784713ec68 rt: Add a canary value to the end of every stack 
Check it on upcall entry and exit, and on stack deletion
 2011-12-20 11:48:47 -08:00
Brian Anderson
bd6b80c972 rt: Get rid of the rethrow in upcall_fail 
Throwing in upcall_fail ends up running lots of code in the red zone. To avoid
it we have the personality function figure out which stack it's on and switch
as needed.
 2011-12-18 17:17:31 -08:00
Brian Anderson
4ac345939c rt: Cache an extra stack segment to avoid bad behavior at stack boundaries 2011-12-17 13:45:38 -08:00
Brian Anderson
5d1a1dc420 rt: Rename stk_seg.limit to stk_seg.end 
rust_task is using the word limit it two ways, so one has to change.
 2011-12-06 21:45:53 -08:00
Brian Anderson
9a738fd61d rt: Various tweaks to make __morestack unwinding work on linux 
When unwinding through __morestack the stack limit in the TLS is invalidated
and must be reset. Instead of actually landing at __morestack we're
just going to make all our Rust landing pads call upcall_reset_stack_limit,
which will find the stack segment that corresponds to the current stack
pointer and put the limit in the TLS.

Also massively expand the stack segment red zone to make more room for the
dynamic linker. Will fix in the future.
 2011-12-06 16:32:41 -08:00
Brian Anderson
6da1a3fcd6 rt: Refactor record_sp into task::record_stack_limit 2011-12-01 15:26:42 -08:00
Brian Anderson
f2de42c39a rt: Reorganize stack growth code 2011-11-30 20:31:33 -08:00
Brian Anderson
e6ef4d929c rt: Remove the stack pointer field of stk_seg 2011-11-30 20:31:33 -08:00
Brian Anderson
6bdf347418 rt: Make __morestack (without unwinding) work on 32-bit linux 2011-11-22 18:02:10 -08:00
Brian Anderson
1e58049da2 rt: Remove fail calls from rust_task::yield 2011-11-18 15:36:48 -08:00
Brian Anderson
0dfa1410d3 rt: Remove task::on_wakeup. Unused 2011-11-18 10:32:27 -08:00
Brian Anderson
d52888f0ba rt: Remove rust_task::yield. Unused 2011-11-18 10:32:27 -08:00
Brian Anderson
bae817efe6 rt: Remove rust_task::notify_tasks_wating_to_join 2011-11-16 17:22:14 -08:00
Niko Matsakis
26b0662fb8 fix alignment for chan_handle structs; rust equiv is translated 
to char[16], not struct{long,long}
 2011-11-16 15:16:42 -08:00
Niko Matsakis
b78c096ebc enum does not have a size consistent with a tag, so use unsigned long instead 2011-11-16 15:16:41 -08:00
Brian Anderson
58e923de6e rt: Perform task notification before killing the parent task 2011-11-13 16:36:47 -08:00
Brian Anderson
3d9023fa4d rt: Take the task lock when dropping port refcounts 
Sucks, but otherwise there are races when one task drops the refcount to zero
followed by another bumping it again
 2011-11-11 16:11:31 -08:00
Brian Anderson
5d1e321ecb rt: Remove rust_chan 2011-11-11 12:11:21 -08:00
Patrick Walton
c9003d301f Stub a __morestack implementation and stack segment allocation. Untested. 2011-10-31 14:20:56 -07:00
Patrick Walton
5c973142df rt: Turn on cycle collection at task death; add a test case 2011-09-26 16:59:15 -07:00
Patrick Walton
ad19ab4c6f rt: Make the logic that moves environments between tasks update the GC alloc chain correctly 2011-09-26 16:59:15 -07:00
Patrick Walton
61afef29a1 rt: Add a RUST_TRACK_ORIGINS debug flag to help track down memory corruption 2011-09-23 11:42:20 -07:00
Patrick Walton
8c02adc630 rustc: Port the fn and obj traversal logic over from the GC branch. Doesn't actually do anything yet due to lack of support in trans. 2011-09-21 19:08:26 -07:00
Patrick Walton
77f0101edb rt: Add an on-the-side GC chain 2011-09-20 15:35:14 -07:00
Patrick Walton
307957710c rt: Remove the GC alloc chain 2011-09-20 14:20:16 -07:00
Patrick Walton
3632629acc rt: Introduce a self-describing box representation and functions to create and free them 2011-09-19 11:40:41 -07:00
Brian Anderson
103197bc42 Make failure propagation to dead parents work 
The failure will basically go 'through' the dead parent and continue
propagating the failure (as if the child was reparented).
 2011-09-14 15:48:14 -07:00
Brian Anderson
9505d70513 Make linked task failure work again 2011-09-14 14:20:41 -07:00
Brian Anderson
c047cfb710 Unwind the stack on task failure 
When a task fails, we will throw an exception, then catch it at the bottom of
the stack.

On Windows we don't do this yet because the exception doesn't propagate
correctly.

No cleanups yet.

Issue #236
 2011-09-07 10:32:58 -07:00
Brian Anderson
25ae3d655c Rewrite spawn yet again 
The motivation here is that the bottom of each stack needs to contain a C++
try/catch block so that we can unwind. This is already the case for main, but
not spawned tasks.

Issue #236
 2011-09-07 10:32:58 -07:00
Eric Holk
2f7c583bc1 Cleaning up task and comm exports, updating all the test cases. 2011-08-25 11:21:25 -07:00
Patrick Walton
d0171913aa rt: Remove rustboot's GC infrastructure 2011-08-19 19:17:05 -07:00
Eric Holk
ae89ea223d Making more of the rust_task structure directly accessible from Rust. 2011-08-17 14:42:40 -07:00
Patrick Walton
d8c5bd6195 rt: Implement obstacks, untested as of yet 2011-08-16 19:49:25 -07:00
Eric Holk
8686645aad New channel-based task status notifications. 2011-08-16 16:47:40 -07:00
Eric Holk
cf2def46c1 Removed trans_comm.rs from the compiler. Updating aio/sio to work with the new chan and port system, started on a networking module for the standard library. 2011-08-16 09:36:29 -07:00
Eric Holk
5c6790519b Reducing the chances for race conditions in join. 2011-08-15 12:39:55 -07:00
Eric Holk
b2dad8af31 Added a library version of spawn. Before long, we can remove the old version. 2011-08-15 09:26:51 -07:00
Eric Holk
04af99ecb0 First step towards port handles. 2011-08-15 09:26:51 -07:00
unknown
44bef5f2cb Introduced task handles. 
This is the new way to refer to tasks in rust-land. Currently all they
do is serve as a key to look up the old rust_task structure. Ideally
they won't be ref counted, but baby steps.
 2011-08-08 16:55:38 -07:00
Eric Holk
b62e80c1f0 Atomic ref counting for chans. 2011-08-05 15:27:28 -07:00
Eric Holk
d1dbb99984 Removing proxies and message queues. 2011-07-29 18:54:59 -07:00
Eric Holk
279844ce9f Atomic reference counting for tasks. 2011-07-28 10:47:28 -07:00
Eric Holk
62bc6b5113 Per-thread scheduling. Closes #682. 
Tasks are spawned on a random thread. Currently they stay there, but
we should add task migration and load balancing in the future. This
should drammatically improve our task performance benchmarks.
 2011-07-28 10:47:28 -07:00
Eric Holk
b51f5c395c Made root_task no longer special. 2011-07-28 10:47:28 -07:00
Eric Holk
3ae4dcd41e Lots of work on memory tracking and channels. 
We're trying to get closer to doing correct move semantics for channel
operations. This involves a lot of cleanup (such as removing the
unused sched parameter from rust_vec constructor) and making
circular_buffer kernel_owned.

Added tagging for memory allocations. This means we give a string tag
to everything we allocate. If we leak something and TRACK_ALLOCATIONS
is enabled, then it's much easier now to tell exactly what is leaking.
 2011-07-21 11:51:22 -07:00
Brian Anderson
ced8393f20 Modify task::join to indicate how the task terminated 
This involves sticking yet another field into the task structure
 2011-07-15 10:07:29 -07:00
Graydon Hoare
39151f2ad8 Prohibit trailing whitespace under 'tidy' script. Clean up all caught cases. 2011-07-13 15:44:09 -07:00
Graydon Hoare
49116adbe9 Fix compile-command lines in rt. 2011-07-13 13:51:20 -07:00
Graydon Hoare
2e2951305d Remove obsolete nargs counts from runtime. 2011-07-13 13:43:35 -07:00
Eric Holk
8acadb17c2 Work on debugging race conditions. 
Ports and channels have been moved to the kernel pool, since they've
been known to outlive their associated task. This probably isn't the
right thing to do, the life cycle needs fixed instead.

Some refactorying in memory_region.cpp. Added a helper function to
increment and decrement the allocation counter. This makes it easier
to switch between atomic and non-atomic increments. Using atomic
increments for now, although this still does not fix the problem.
 2011-07-07 18:22:27 -07:00
Eric Holk
dcd2563a3a Removing the synchronized memory region from tasks. 2011-07-07 18:22:27 -07:00
Eric Holk
bc5d6aefda Added a task wakeup callback. Closes #599. 
The callback happens when a task moves from the "blocked" state to the
"running" state. The callback is also inherited by child tasks. There
is currently only a native API.

This code hasn't been heavily exercised yet.
 2011-07-06 11:30:00 -07:00
Eric Holk
b3e5b5bd05 Added inheritance for task pinning. Closes #598 for real. 2011-06-29 18:56:34 -07:00
Eric Holk
63dcd325b9 Adding support for pinning tasks to the currently running thread. Closes #598. 2011-06-29 18:47:47 -07:00
Eric Holk
657e5a2bd5 Renamed what's left of rust_dom to rust_scheduler 2011-06-28 16:12:33 -07:00
Eric Holk
49a8cb34d2 Removed dom_owned, splitting things between task_owned and kernel_owned. Had to re-xfail a few tests brson recently un-xfailed. 2011-06-28 16:12:33 -07:00
Eric Holk
f6f945fed5 Moved thread management to rust_kernel. 2011-06-28 16:12:33 -07:00
Eric Holk
6367bcf427 Fixed a few concurrency bugs. Still not perfect, but overall it seems much more reliable. 2011-06-27 09:58:39 -07:00
Eric Holk
4bc773465f Basic multithreading support. The infinite loops test successfully maxes out the CPU. 2011-06-27 09:58:39 -07:00
Eric Holk
67360ae618 Fixed a problem where spawn arguments were getting lost again. Also, fixed up stack alignment, which closes #496 2011-06-15 18:16:59 -07:00
Eric Holk
d1857d30fc This is the mega-ucontext commit. It replaces the task switching mechanism with a new one inspired by ucontext. It works under Linux, OS X and Windows, and is Valgrind clean on Linux and OS X (provided the runtime is built with gcc). 
This commit also moves yield and join to the standard library, as requested in #42. Join is currently a no-op though.
 2011-06-13 18:14:13 -07:00
Graydon Hoare
79c9e13073 More delicious dead code removal from runtime, upcalls. 2011-05-26 18:21:02 -07:00
Rafael Ávila de Espíndola
fe90159b86 "constant propagate" rust_new_exit_task_glue to its only use. 2011-05-24 15:51:22 -04:00
Rafael Ávila de Espíndola
cebc9b359d Remove dead rustboot code. 2011-05-18 13:48:57 -04:00
Rafael Ávila de Espíndola
a3ff02f126 Split start into rustc and rustboot versions. This introduces a bit of 
duplication, but we will hopefully drop the rustboot one soon.

This is also a preparation for changing the rustc one to have the activate glue
return to the exit glue which will then call the main function.

This (returning to the function that calls main) matches what happens when
loader stats a program or a new thread. It lets gdb produce good backtraces
and should help with EH too.
 2011-05-03 10:24:18 -04:00