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317 commits

Author SHA1 Message Date
Gareth Rees
e93f962230 Merge branch/2018-07-09/seg-alloc into the master sources. 
Copied from Perforce
 Change: 194690
 2018-07-19 06:25:51 +01:00
Gareth Rees
c692e2b6e0 Represent the set of generations condemned for a trace. 
Eliminate duplication between policyCondemnChain and traceCondemnAll.
Compute better mortality estimate for collection of the world.

Copied from Perforce
 Change: 194611
 2018-07-11 21:14:43 +01:00
Gareth Rees
f3f941284f New bufferfill and bufferempty methods on segments. 
Copied from Perforce
 Change: 194568
 2018-07-10 15:02:18 +01:00
Gareth Rees
ba03d79694 Catch-up merge from master sources at changelevel 194449 to branch/2018-06-18/mrgseg. 
Copied from Perforce
 Change: 194452
 2018-07-05 16:22:24 +01:00
Gareth Rees
bb53551d8f Merge branch/2018-07-04/mvff-perf into the master sources. 
Copied from Perforce
 Change: 194439
 2018-07-05 12:54:16 +01:00
Gareth Rees
73702aa7f1 No need for rvalue(&(...)) -- the result of the & operator is not an lvalue. 
Copied from Perforce
 Change: 194424
 2018-07-05 10:24:22 +01:00
Gareth Rees
ae3cc16e4b Function implementations call the macro implementations, to reduce the burden of keeping the functions and macros consistent. 
Copied from Perforce
 Change: 194418
 2018-07-05 09:28:01 +01:00
Gareth Rees
0cf1718af9 Improve performance of mvff in hot builds by: 
1. Using macros to bypass PoolFree and Land* generic functions.
2. Compiling out assertions on functions on the critical paths for manual allocation and freeing.
3. Taking advantage of the fact that splay->updateNode does not change during a splay operation.

Copied from Perforce
 Change: 194397
 2018-07-04 14:30:22 +01:00
Gareth Rees
01baf3cfda New generic function segflip allows the segment to decide how to handle a trace that’s about to flip. 
Copied from Perforce
 Change: 194000
 2018-06-20 10:23:16 +01:00
Gareth Rees
9d244d3e14 Refactor arenapeekseg so that it maintains the mps invariants by scanning the segment if necessary. arenaread is now a thin wrapper around arenapeekseg. new function arenawrite is now the corresponding wrapper around arenapokeseg. 
MRG reference segments inherit from GCSeg (not MutatorSeg) and so don't have hardware barriers. Instead, the code implements software barriers by always using ArenaRead and ArenaWrite.

Copied from Perforce
 Change: 193990
 2018-06-19 16:25:52 +01:00
Gareth Rees
fd1d022908 Segment class gcseg no longer implements hardware barriers; these are implemented by new subclass mutatorseg, which is now used everywhere that gcseg was used formerly. the idea is that in a future change mrgrefseg will inherit from gcseg instead of mutatorseg. 
Copied from Perforce
 Change: 193981
 2018-06-19 14:45:42 +01:00
Gareth Rees
de94fe2aa3 Catch-up merge from master sources at change 193831 to branch/2017-03-04/seg-methods. 
Copied from Perforce
 Change: 193836
 2018-06-15 13:46:23 +01:00
Gareth Rees
e70b4c273c Take locks before fork(), release them in the parent and reinitialize them in the child. 
Add forktest target to the Xcode project.
Write design for fork safety and cross-reference from the code.
Update release notes.

Copied from Perforce
 Change: 193760
 2018-06-14 16:25:08 +01:00
Gareth Rees
2401957e62 Extend forktest so that it does allocation before the fork and collection afterwards; this ensures that we hit the read barrier and thus exercise the exception handling. 
After forking in the child, re-create exception port and exception thread, and re-register the (only) thread with that port.

Copied from Perforce
 Change: 193755
 2018-06-14 12:54:35 +01:00
Gareth Rees
8146970622 Add fork test case (fails on os x if pthread_atfork is not called). 
pthread_atfork handlers on OS X: in the child, update the mach port for the forking thread and move all other threads to the dead ring.

Copied from Perforce
 Change: 193746
 2018-06-13 17:09:07 +01:00
Gareth Rees
52d6325133 New pool method poolsegpoolgen gets the pool generation for a segment. (this allows the segment whiten and reclaim methods not to need to know the pool class.) 
Copied from Perforce
 Change: 193084
 ServerID: perforce.ravenbrook.com
 2017-03-31 13:28:25 +01:00
Gareth Rees
2a24ad79df Since we know that a segment belongs to a pool with a format at the point where we call segwalk, it makes sense to pass the format. 
Copied from Perforce
 Change: 193079
 ServerID: perforce.ravenbrook.com
 2017-03-31 09:15:41 +01:00
Gareth Rees
a697ef913f Move alignshift to pool structure allows us to eliminate duplicate code between awl and lo. 
Copied from Perforce
 Change: 193071
 ServerID: perforce.ravenbrook.com
 2017-03-31 08:41:14 +01:00
Gareth Rees
79c2263d53 No need for poolclassmixinscan and abstractscanpool. 
Copied from Perforce
 Change: 193045
 ServerID: perforce.ravenbrook.com
 2017-03-30 10:23:15 +01:00
Gareth Rees
d4a68602ff Changing segnowalk to segtrivwalk avoids the need for attrfmt (now we can walk all segments). 
Copied from Perforce
 Change: 193044
 ServerID: perforce.ravenbrook.com
 2017-03-30 10:18:22 +01:00
Gareth Rees
2ffd832103 Move access method from pool class to segment class. 
Copied from Perforce
 Change: 193039
 ServerID: perforce.ravenbrook.com
 2017-03-30 09:55:37 +01:00
Gareth Rees
a400239f7e Move walk method from pool class to segment class. 
Copied from Perforce
 Change: 193028
 ServerID: perforce.ravenbrook.com
 2017-03-30 08:54:35 +01:00
Gareth Rees
b7a490ae32 Move fix and fixemergency methods from pool class to segment class. 
Copied from Perforce
 Change: 193023
 ServerID: perforce.ravenbrook.com
 2017-03-30 08:09:14 +01:00
Gareth Rees
00a4ade456 Move scan method from pool class to segment class. 
Copied from Perforce
 Change: 193012
 ServerID: perforce.ravenbrook.com
 2017-03-29 19:17:17 +01:00
Gareth Rees
db5db0a9f3 Move reclaim method from pool class to segment class. 
Copied from Perforce
 Change: 193007
 ServerID: perforce.ravenbrook.com
 2017-03-29 17:13:45 +01:00
Gareth Rees
07adf64ebb Move whiten method from pool class to segment class. 
Copied from Perforce
 Change: 193002
 ServerID: perforce.ravenbrook.com
 2017-03-29 16:22:14 +01:00
Gareth Rees
47a1715c2d Move greyen method from pool class to segment class. 
Copied from Perforce
 Change: 192997
 ServerID: perforce.ravenbrook.com
 2017-03-29 15:58:32 +01:00
Gareth Rees
1dc5ac742a Move the blacken method from the pool class to the segment class. 
Copied from Perforce
 Change: 192994
 ServerID: perforce.ravenbrook.com
 2017-03-29 15:32:17 +01:00
Gareth Rees
79d301f528 Cherry-pick change 192595 from custom/cet/main, removing mps_addr_object. this function failed to solve the problem of decoding the stack on 64-bit windows, because the stack may need to be decoded after an mps assertion failure, in which case the arena lock is held and mps_addr_object cannot be called. we eventually solved the problem in a different way (using mps_arena_postmortem) and mps_addr_object is no longer used. 
Copied from Perforce
 Change: 192637
 ServerID: perforce.ravenbrook.com
 2016-10-19 14:13:38 +01:00
Gareth Rees
587a3efb20 Remove unused pool class methods tracebegin and traceend. 
Remove unused event AMCTraceEnd.
The fixEmergency method must have the same type as the fix method because of how they are used.

Copied from Perforce
 Change: 192636
 ServerID: perforce.ravenbrook.com
 2016-10-19 14:07:20 +01:00
Gareth Rees
c6a0bd0f34 Remove unused functions landcreate and landdestroy. 
Copied from Perforce
 Change: 192603
 ServerID: perforce.ravenbrook.com
 2016-10-14 22:30:11 +01:00
Gareth Rees
5c31ca3cab Rename the "protection mutator context" module to "mutator context" (this module handles mutator context decoding for both the protection module and the thread module). 
Rename functions Prot{Can,}StepInstruction to MutatorContext{Can,}StepInstruction so that they follow the naming convention in guide.implc.naming.prefix.program.
Move mutator context declarations out of prot.h into new header prmc.h.
Correct .assume.null in a couple of places -- it's not safe for MutatorContextStepInstruction to return ResUNIMPL, instead MutatorContextCanStepInstruction should return FALSE.

Copied from Perforce
 Change: 192528
 ServerID: perforce.ravenbrook.com
 2016-10-13 15:06:14 +01:00
Gareth Rees
c35e544d73 Rename mutatorfaultcontext to mutatorcontext because this data structure is not only used to store the context of a fault, but also to store the context of a thread that has been suspended. 
Copied from Perforce
 Change: 192523
 ServerID: perforce.ravenbrook.com
 2016-10-13 14:23:39 +01:00
Gareth Rees
3cd7835844 Catch-up merge from custom/cet/branch/2016-09-13/job004006 to branch/2016-09-06/job004006. 
Copied from Perforce
 Change: 192351
 ServerID: perforce.ravenbrook.com
 2016-09-13 15:33:31 +01:00
Gareth Rees
8340e390a5 In order to be able to test mps_arena_busy in all build configurations, we must always take and release the arena lock, even in the single-threaded case. we gain some additional checking by doing this, at low cost (since in this build configuration the locks are generic and so just increment/decrement a count of claims). 
In the CONFIG_POLL_NONE we configuration, we would still like to check that no traces are busy when leaving the arena, but since we now call ArenaLeave in this configurations, move the assertion to ShieldLeave.
In ArenaDestroy, call ArenaLeave, don't just release the lock.

Copied from Perforce
 Change: 192267
 ServerID: perforce.ravenbrook.com
 2016-09-09 13:01:25 +01:00
Gareth Rees
d8c32f0d3f New functions mps_arena_busy and mps_arena_postmortem, plus test coverage. 
Copied from Perforce
 Change: 192247
 ServerID: perforce.ravenbrook.com
 2016-09-08 13:55:43 +01:00
Gareth Rees
331ec20beb Catch-up merge from master sources to branch/2016-04-12/job004000. 
Copied from Perforce
 Change: 192187
 ServerID: perforce.ravenbrook.com
 2016-09-05 16:01:17 +01:00
Gareth Rees
c07c5d6b8f Catch-up merge from the master sources to branch/2016-04-23/inst-methods. 
Copied from Perforce
 Change: 192176
 ServerID: perforce.ravenbrook.com
 2016-09-05 15:31:34 +01:00
Gareth Rees
baf2277b30 Catch-up merge from the master sources. 
Copied from Perforce
 Change: 192170
 ServerID: perforce.ravenbrook.com
 2016-09-05 15:21:33 +01:00
Richard Brooksby
e26f0b64e5 Replacing segbuffer with version that returns bool and the buffer, and disallowing null to segsetbuffer, adding setunsetbuffer for that case instead. 
Copied from Perforce
 Change: 191695
 ServerID: perforce.ravenbrook.com
 2016-04-27 15:47:26 +01:00
Richard Brooksby
9a6981ae41 Temporarily introducing seggetbuffer to eliminate use of "null" to mean "no buffer". 
Copied from Perforce
 Change: 191694
 ServerID: perforce.ravenbrook.com
 2016-04-27 15:27:47 +01:00
Richard Brooksby
9a2f29e3b2 Converting pool finish methods to specialize instfinish, and fixing up quite a few calls to use nextmethod. 
Copied from Perforce
 Change: 191605
 ServerID: perforce.ravenbrook.com
 2016-04-23 15:37:12 +01:00
Richard Brooksby
1f8eb75895 Converting pool describe methods to specialise instdescribe. 
Copied from Perforce
 Change: 191604
 ServerID: perforce.ravenbrook.com
 2016-04-23 15:37:12 +01:00
Richard Brooksby
9a38cd69db Making describe a method on inst and implementing generic describe for segments. 
Copied from Perforce
 Change: 191601
 ServerID: perforce.ravenbrook.com
 2016-04-23 15:37:11 +01:00
Richard Brooksby
056a298003 Turning segment describe methods the right way in, so that they call next-method. deleting duplicate implementation of basic segment describe! 
Copied from Perforce
 Change: 191588
 ServerID: perforce.ravenbrook.com
 2016-04-23 00:48:48 +01:00
Richard Brooksby
a8e91f0ac8 Turning pool describe methods the right way in, so that they call next-method. 
Copied from Perforce
 Change: 191587
 ServerID: perforce.ravenbrook.com
 2016-04-23 00:22:46 +01:00
Gareth Rees
ea578a4939 Catch-up merge from master sources to branch/2016-04-20/seghasbuffer. 
Copied from Perforce
 Change: 191548
 ServerID: perforce.ravenbrook.com
 2016-04-22 11:38:55 +01:00
Gareth Rees
7d30523dcd New function seghasbuffer. 
Copied from Perforce
 Change: 191537
 ServerID: perforce.ravenbrook.com
 2016-04-22 10:08:29 +01:00
Gareth Rees
fb3e4144a9 Untabify. 
Copied from Perforce
 Change: 191528
 ServerID: perforce.ravenbrook.com
 2016-04-21 20:50:45 +01:00
Gareth Rees
6d0dccb644 Catch-up merge from master sources to branch/2016-04-12/job004000. 
Copied from Perforce
 Change: 191512
 ServerID: perforce.ravenbrook.com
 2016-04-21 18:03:23 +01:00