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323 Commits

Author SHA1 Message Date
Patrick Walton
ced0d4f15e rt: More work on morestack 2011-11-14 16:17:08 -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
07771ec25b Fix run-fail/spawnfail 
Catch the case where a parent is killed immediately before it terminates
normally.
 2011-11-11 14:20:00 -08:00
Brian Anderson
2385deaa0d rt: Add locking invariants to rust_task 2011-11-11 12:11:21 -08:00
Brian Anderson
5d1e321ecb rt: Remove rust_chan 2011-11-11 12:11:21 -08:00
Brian Anderson
793da65a8e rt: Move rust_chan::send to rust_port::send 2011-11-10 17:53:19 -08:00
Patrick Walton
c9003d301f Stub a __morestack implementation and stack segment allocation. Untested. 2011-10-31 14:20:56 -07:00
Marijn Haverbeke
8124846b2c Get rid of taskpointer-passing throughout the compiler 
Only intrinsics still take a dummy taskptr. We'll have to do some
makefile stunts to snapshot a version without taskptrs-in-intrinsics.

Issue #466
 2011-10-20 14:22:17 +02:00
Marijn Haverbeke
e927df17f7 Remove spawn_wrap and main_wrap kludges 
This isn't needed now that our functions are cdecl (and was apparently
only still working by accident).

Issue #992
 2011-10-20 13:15:09 +02:00
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
307957710c rt: Remove the GC alloc chain 2011-09-20 14:20:16 -07:00
Brian Anderson
25394950ae Handle the case where a child task tries to kill a parent while it is dying 
Still looks pretty racy
 2011-09-16 10:05:12 -07:00
Brian Anderson
a0ad9a42cd Unsupervise tasks before the scheduler kills them. Unblock before yield->fail 2011-09-14 17:05:35 -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
6f6f36172b Remove unused task_exit function 
Issue #236
 2011-09-11 17:31:40 -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
c337fd5467 Child tasks take a ref to their parents 
This is so that when a child dies after the parent, it still holds a valid
pointer and can call supervisor->kill() safely.
 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
Brian Anderson
bb08ffbaf4 Refactor task failure a bit 
Issue #236
 2011-09-07 10:32:58 -07:00
Brian Anderson
abdb6cd71b Rewrite reap_dead_tasks to never grab the sched lock before a task lock 
Doing so contradicts the locking order used everywhere else and causes
deadlocks.

Un-XFAIL task-perf-spawnalot

Closes #854
 2011-08-20 16:21:27 -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
be7325073a Removed spawn and task from the parser. Updated all the tests except for the benchmarks. 2011-08-15 09:26:52 -07:00
Eric Holk
b9f1f77622 Fixed memory accounting and task stack creation bugs. 2011-08-15 09:26:51 -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
d1dbb99984 Removing proxies and message queues. 2011-07-29 18:54:59 -07:00
Brian Anderson
4ef1ec580a Do all runtime calls to getenv at initialization 
getenv is not threadsafe and (maybe as a result) it's randomly crashing with
CFLAGS=-g and RUST_THREADS=32. Calls from rust code are still on their
own.
 2011-07-28 12:23:01 -07:00
Eric Holk
279844ce9f Atomic reference counting for tasks. 2011-07-28 10:47:28 -07:00
Eric Holk
5302cde188 Made task threads wait instead of sleep, so they can be woken up. This appears to give us much better parallel performance. 
Also, commented out one more unsafe log and updated rust_kernel.cpp to compile under g++
 2011-07-28 10:47:28 -07:00
Eric Holk
e697a52359 Adding a function to stdlib to set the min stack size, for programs 
that absolutely will not succeed with a large default stack. This
should be removed once we have stack grown working.

Also updated word-count to succeed under the new test framework.
 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
Michael Sullivan
f33309502a Bump the stack size and make the RUST_MIN_STACK env variable accept hex values. 2011-07-21 14:05:51 -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
Brian Anderson
4738cf83b0 Move the responsibility for process failure from tasks to the scheduler 
When the root task fails the process fails. Failures on other tasks propagate
up the task tree. Failures on non-root tasks without parents just
(theoretically) unwind and disappear.
 2011-07-14 17:44:39 -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
Graydon Hoare
01fc165517 Attempt to correct buggy win32 timer code (causing tinderbox failures). 2011-07-13 12:25:36 -07:00
Eric Holk
d7db25e8f6 Added an environment variable to override the minimum stack size. Closes #637. 2011-07-08 11:36:56 -07:00
Eric Holk
4739953b84 Fixed two races. 
The first is that the memory_region destructor would complain there is
still an outstanding allocation. This is because circular_buffer from
rust_chan wasn't refing its task, so the task was being destructed too
soon.

The second was where the program could deadlock while joining a
task. The target task would die in the time between checking whether
the task should block and then actually blocking. The fix is to use
the target task's lock.
 2011-07-07 18:22:27 -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
a0f45f4456 Removing most of the locks in rust_upcall.cpp and elsewhere. 2011-07-07 18:22:27 -07:00
Patrick Walton
0391e14fc2 rt: Double stack size 2011-07-06 15:13:00 -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
2f84987a48 Fixed Win32 compile errors. 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
Graydon Hoare
bc9fa31618 A little tidying in rt. 2011-06-27 10:08:57 -07:00
Eric Holk
022ebc198b Implementation mising features in lock_and_signal for Win32. Also lowered the minimum stack size to get the pfib benchmark to run without exhausting its address space on Windows. 2011-06-27 09:58:39 -07:00
Eric Holk
681c063ec0 Conservatively serialize nearly all upcalls. Successfuly ran make check with RUST_THREADS=8, so we're probably fairly safe now. In the future we can relax the synchronization to get better performance. 2011-06-27 09:58:39 -07:00
Eric Holk
4d99bf9af2 Added some locking to ports to prevent the case where two threads simultaneously wake up a task blocked on a certain port. 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
01ea27b205 Step 1 of moving task startup to always be cdecl. 2011-06-15 12:10:15 -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
Eric Holk
d49998f0ed Switching over to wrappers for spawning functions of multiple arguments. Doesn't quite work yet. 2011-05-27 15:20:58 -07:00
Eric Holk
dad426419c Working on 2 argument spawn. The arguments seem to be copied correctly once, but then they get lost. 2011-05-27 15:20:58 -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
de2e84e5b0 Only one gc glue. 2011-05-24 18:52:31 -04:00
Rafael Ávila de Espíndola
ac836dd79c There is only one yield glue. 2011-05-24 18:29:08 -04:00
Rafael Ávila de Espíndola
b1292580b9 Remove dead code for unwind_glue. 2011-05-24 17:28:37 -04:00
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
8df37716ce Fix OS X build. 2011-05-05 23:16:59 -04:00
Rafael Ávila de Espíndola
d6deeffd95 Change the setup so that rust_activate_glue returns to rust_exit_task_glue 
and rust_exit_task_glue calls the rust main.

This is simpler since we only need to setup one frame. It also matches
what ld.so does, so gdb is happy and stops a backtrace at rust_exit_task_glue
instead of continuing past whatever function happened to be before
rust_exit_task_glue is the object file.

This is the rt part and should be merged after the rust0 part.
 2011-05-05 15:46:10 -07:00
Graydon Hoare
895ec07453 Try to fail nicely, again. 2011-05-04 15:04:53 +00:00
Rafael Ávila de Espíndola
5617462388 Remove unused variable. 2011-05-03 11:06:57 -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
Marijn Haverbeke
880be6a940 Overhaul logging system in runtime 
See https://github.com/graydon/rust/wiki/Logging-vision

The runtime logging categories are now treated in the same way as
modules in compiled code. Each domain now has a log_lvl that can be
used to restrict the logging from that domain (will be used to allow
logging to be restricted to a single domain).

Features dropped (can be brought back to life if there is interest):
  - Logger indentation
  - Multiple categories per log statement
  - I possibly broke some of the color code -- it confuses me
 2011-04-19 16:57:13 +02:00
Patrick Walton
fee88f79f5 rt: Remove half-baked, incomplete, commented-out print_stack_trace() stub 2011-04-14 11:35:22 -07:00
Patrick Walton
65b7578851 rustc: Remove generalize_ty. Instead, maintain an explicit type parameter substitution list. 2011-04-14 11:24:25 -07:00
Marijn Haverbeke
973023030e add -O2 when compiling rt, fix warnings triggered by optimizer 2011-04-08 00:41:52 +02:00
Marijn Haverbeke
9a7576fe2c Move to macro-based logging checks in the C++ code 
No functions should be called for log statements that turn out to be
inactive.
 2011-04-07 15:15:30 -07:00
Graydon Hoare
a154c5b656 Um, that'd be, align the word *before* retpc. Addresses point to the low part of a word. Un-XFAIL nbody on Darwin. 2011-03-30 14:10:06 -07:00
Graydon Hoare
3e7b991d49 Ensure task stacks start out with a 16-byte aligned entry frame. Should make OSX behave a bit better. 2011-03-30 13:04:18 -07:00
Graydon Hoare
af4d6ae76b Add ABI tagging to crates, adjust rustc output and runtime stack-frame setup so access to argv works. 2011-02-22 16:37:27 -08:00
Graydon Hoare
aaa6965794 Fix typo in rust_task::start. Should be copying 1 fewer initial arg. 2011-02-21 18:55:08 -08:00
Graydon Hoare
d55bee4417 Further corrections to the logging layer in runtime. 2011-01-14 16:50:37 -08:00
Brian Anderson
73fd87baf5 Don't attempt to wake tasks that aren't blocked. 
It's possible for a supervised task to kill and wake its supervising
task then immediately try to wake it again if the supervising task
has joined the supervised. This is the easiest way to prevent that.
 2011-01-03 10:59:00 -08:00
Graydon Hoare
26ecec4e12 Update frame logic to be compatible with SysV x86 ABI. Improves diagnostics. 2010-11-16 13:51:32 -08:00
Patrick Walton
94cec74096 Try to print backtraces on failure 2010-10-11 16:40:18 -07:00
Graydon Hoare
b970563fe3 Patchwork of attempted fixes to effect system and gc system; eventually give up and disable it entirely in the runtime. Will need extensive reworking. 2010-09-29 17:22:13 -07:00
Michael Bebenita
a493350eb5 Cleanup, refactoring, and some runtime tests. 2010-09-10 14:38:31 -07:00
Michael Bebenita
743ca289b6 Cache task handles. 2010-09-08 21:25:16 -07:00
Michael Bebenita
de611a3090 Lots of design changes around proxies and message passing. Made it so that domains can only talk to other domains via handles, and with the help of the rust_kernel. 2010-09-07 18:44:12 -07:00
Michael Bebenita
b03812af2b Change signature of array_list::pop(). 2010-09-07 18:41:08 -07:00
Patrick Walton
fac28ad42f Disable task-growing logic for now until #151 is fixed 2010-08-20 11:05:06 -07:00
Michael Bebenita
e20752de68 Added labels to blocking conditions. 2010-08-17 23:49:57 -07:00
Michael Bebenita
988695a96c Added support for task sleeping in the scheduler. 2010-08-11 21:24:04 -07:00
Graydon Hoare
dbe8760af3 Merge commit 'jyasskin/work' 
Conflicts:
	src/rt/rust_dom.cpp
	src/rt/rust_upcall.cpp
 2010-08-10 13:26:00 -07:00
Michael Bebenita
97d6342bf0 Synthesize a flush_chan upcall right before a channel's ref_count drops to zero. This should only happen in the Rust code and not in the drop glue, or on the unwind path. This change allows the task owning the channel to block on a flush and delete its own channel. This change also cleans up some code around rust_port and rust_chan. 2010-08-09 08:15:34 -07:00
Michael Bebenita
5917ca3519 Fixed deadlock in the scheduler caused by condition variables. 2010-08-09 08:06:08 -07:00
Michael Bebenita
30734a9a7b Some pretty printing in the runtime. 2010-08-09 07:52:07 -07:00
Jeffrey Yasskin
b71340552f Add names to tasks and domains. These can either be an explicit literal string 
after the "spawn" keyword, or implicitly the call expression used to start the
spawn.
 2010-08-09 11:43:16 +02:00
Graydon Hoare
0b9c882d66 Log join-wait count under rust_log::TASK bits, not ::ALL. 2010-07-29 10:41:22 -07:00
Michael Bebenita
4246d567b7 Move ports out into their own file, add data_message and make communication system use it (and proxies) instead of existing token scheme. 2010-07-28 20:30:29 -07:00
Michael Bebenita
4ff8e15128 Move notification-messages out into their own file and unify into notify_message, make them use proxies, cache task proxies in dom. 2010-07-28 20:30:29 -07:00
Michael Bebenita
defd8a66ea Rename rust_proxy_delegate to maybe_proxy, flesh out logic in it. Add strong-ref distinction on rust_proxy. 2010-07-28 20:30:29 -07:00
Michael Bebenita
5db5eb0c55 Null rust_task::cond on wakeup, add asserts and logging to block/wakeup. 2010-07-28 20:30:29 -07:00
Graydon Hoare
9935a48e95 Fix message formatting in runtime library. 2010-07-20 15:16:09 -07:00
Michael Bebenita
00d1465d13 Added a message passing system based on lock free queues for inter-thread communication. Channels now buffer on the sending side, and no longer require blocking when sending. Lots of other refactoring and bug fixes. 2010-07-19 14:05:18 -07:00
Roy Frostig
7c8c98a6d7 Adjust call args laid out by fake frame created in rust_task::start to reflect new position of closure-or-obj pointer. 2010-07-15 12:30:46 -07:00
Graydon Hoare
7c837b8c9b Correct doubly-linked list management logic; bug exposed during conversation on issue #106. 2010-07-12 13:26:28 -07:00
Chris Double
2fcd99c3e6 Fix for compile error when using gcc 4.5.0 2010-07-11 11:10:56 +08:00
Graydon Hoare
b1eeb9b825 Change from 'spawner' to 'supervisor' in rust_task, and add an unsupervise call. 2010-07-05 14:43:40 -07:00
Graydon Hoare
b2692ef2ec Actually link GC allocations onto the gc_alloc_chain, der. 2010-07-02 08:17:41 -07:00
Graydon Hoare
5abc483d9a Move more of the GC logic into the runtime. 2010-06-28 18:53:43 -07:00
Graydon Hoare
eed5c0aa24 Add rust_task::gc(size_t args) method that drops us back into the GC glue. 2010-06-25 16:54:03 -07:00
Graydon Hoare
d6b7c96c3e Populate tree. 2010-06-23 21:03:09 -07:00