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162 commits

Author SHA1 Message Date
Gareth Rees
81fdc239e7 Fix issues identified in review by gdr <https://info.ravenbrook.com/mail/2018/07/07/15-54-49/0/> 
Copied from Perforce
 Change: 194494
 2018-07-07 19:23:58 +01:00
Gareth Rees
317cc9a5a6 Catch-up merge from master sources at changelevel 194484 to branch/2014-10-26/sc. 
Copied from Perforce
 Change: 194487
 2018-07-06 21:42:35 +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
5ee645763e Catch-up merge from master sources at changelevel 194314 to branch/2016-03-01/mvff-control. 
Copied from Perforce
 Change: 194323
 2018-06-29 14:28:33 +01:00
Gareth Rees
d22656c8c4 Catch-up merge from the master sources at changelevel 194194 to branch/2017-03-04/seg-methods. 
Copied from Perforce
 Change: 194267
 2018-06-28 13:52:36 +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
6d3b228200 Fix issues identified in review by apt. 
Copied from Perforce
 Change: 193982
 2018-06-19 14:51:56 +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
b0a73a5c71 Refactor atfork code to improve separation of concerns. 
Copied from Perforce
 Change: 193806
 2018-06-15 10:58:33 +01:00
Gareth Rees
b1ac192a9a Update design history. restore accidentally removed check. 
Copied from Perforce
 Change: 193787
 2018-06-14 17:55:03 +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
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
cb23106273 Add "cold end" and "hot end" to the glossary index. 
Copied from Perforce
 Change: 192660
 ServerID: perforce.ravenbrook.com
 2016-10-20 13:52:30 +01:00
Gareth Rees
91551170b1 Remove return statements that have no effect. 
Copied from Perforce
 Change: 192529
 ServerID: perforce.ravenbrook.com
 2016-10-13 15:17:50 +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
5a580660f6 Remove undocumented global mps_exception_info. now that the mps is open source, there is no difficulty in debugging the mutator context. 
Copied from Perforce
 Change: 192518
 ServerID: perforce.ravenbrook.com
 2016-10-13 13:45:31 +01:00
Gareth Rees
904ac5beb6 Revert incorrect change to globalspreparetodestroy (see change 192365) that made the mps assert when destroying an arena with uncollected finalization messages. 
Copied from Perforce
 Change: 192473
 ServerID: perforce.ravenbrook.com
 2016-09-27 11:57:19 +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
55adbe705d Fix assertion text in the manual. 
Place a cross-reference by each assertion the appears in the manual, to assist in keeping the manual up to date.

Copied from Perforce
 Change: 192097
 ServerID: perforce.ravenbrook.com
 2016-09-02 14:11:08 +01:00
Gareth Rees
fa2fced306 Clear the emergency before removing the trace from busytraces, to avoid violating <code/global.c#emergency.invariant>. 
Copied from Perforce
 Change: 191774
 ServerID: perforce.ravenbrook.com
 2016-05-02 13:06:07 +01:00
Richard Brooksby
f288d65473 Removing bogus arenatrivdescribe and turning arenadescribe the right way in. 
Copied from Perforce
 Change: 191480
 ServerID: perforce.ravenbrook.com
 2016-04-21 15:27:41 +01:00
Richard Brooksby
930b6a315b Moving location dependency history into its own structure to reduce arenastruct bloat. 
Copied from Perforce
 Change: 191417
 ServerID: perforce.ravenbrook.com
 2016-04-21 09:05:34 +01:00
Gareth Rees
5581b66e91 Merge branch/2016-04-19/job004011. 
Copied from Perforce
 Change: 191374
 ServerID: perforce.ravenbrook.com
 2016-04-20 16:00:43 +01:00
Gareth Rees
04e129be5c Ensure that at most one collection of the world can be started in a call to arenapoll. this avoids a loop if the live set is large enough to provoke the "dynamic criterion". 
Copied from Perforce
 Change: 191274
 ServerID: perforce.ravenbrook.com
 2016-04-19 18:17:09 +01:00
Gareth Rees
942bee5823 Compile out statistic declarations in non-statistical varieties (at the cost of some syntax checking). 
Add some missing STATISTIC guards where statistics are used.
Add design documentation.
Avoid unnecessary distinction between STATISTIC and STATISTIC_STAT (both result in statements).

Copied from Perforce
 Change: 191178
 ServerID: perforce.ravenbrook.com
 2016-04-16 12:07:10 +01:00
Richard Brooksby
31258533cf Catch-up merge from master sources to branch/2016-03-01/mvff-control. 
Copied from Perforce
 Change: 190549
 ServerID: perforce.ravenbrook.com
 2016-03-30 16:17:37 +01:00
Richard Brooksby
d6a2cf6f14 Catch-up merge from master sources to branch/2014-10-26/sc. 
Copied from Perforce
 Change: 190483
 ServerID: perforce.ravenbrook.com
 2016-03-27 21:28:39 +01:00
Richard Brooksby
681886a8ac Catch-up merge from master sources to branch/2016-03-11/shield-coalesce. 
Copied from Perforce
 Change: 190373
 ServerID: perforce.ravenbrook.com
 2016-03-24 11:08:24 +00:00
Richard Brooksby
397f3713f9 Fixing build errors on windows (w3i6mv). 
tagtest was missing from makefiles.
Implicit conversion warning from Clock to double.

Copied from Perforce
 Change: 190372
 ServerID: perforce.ravenbrook.com
 2016-03-24 11:04:58 +00:00
Richard Brooksby
7d0cc19ca3 Tearing down shield correctly. 
Copied from Perforce
 Change: 190225
 ServerID: perforce.ravenbrook.com
 2016-03-20 01:01:54 +00:00
Richard Brooksby
f3bde6fd39 Promoting shield to first class structure. 
Copied from Perforce
 Change: 190219
 ServerID: perforce.ravenbrook.com
 2016-03-20 00:32:43 +00:00
Richard Brooksby
1f361c4fc7 Separating flag for segment in shield cache from depth, clarifying code and optimising segfree somewhat. 
Copied from Perforce
 Change: 190194
 ServerID: perforce.ravenbrook.com
 2016-03-19 13:42:09 +00:00
Richard Brooksby
6d4aca1182 Updating shield design and actually checking invariants in code. 
Copied from Perforce
 Change: 190192
 ServerID: perforce.ravenbrook.com
 2016-03-19 10:15:10 +00:00
Richard Brooksby
bd9ef4dcf2 Catch-up merge from master sources to branch/2016-03-11/shield-coalesce. 
Copied from Perforce
 Change: 190150
 ServerID: perforce.ravenbrook.com
 2016-03-17 13:53:40 +00:00
Richard Brooksby
d7923e66ff Allocate the shield cache. also improve commentary quite a bit. 
Copied from Perforce
 Change: 190147
 ServerID: perforce.ravenbrook.com
 2016-03-17 13:37:40 +00:00
Richard Brooksby
f8af9acea9 Catch-up merge from master sources to branch/2014-10-26/sc. 
Copied from Perforce
 Change: 190118
 ServerID: perforce.ravenbrook.com
 2016-03-16 17:36:35 +00:00
Richard Brooksby
44f80af1ec Merging branch mps/branch/2016-03-13/without-reservation into master sources. 
Copied from Perforce
 Change: 190106
 ServerID: perforce.ravenbrook.com
 2016-03-15 13:19:27 +00:00
Richard Brooksby
9f25d5956f Catch-up merge from master sources to branch/2014-10-26/sc. 
Copied from Perforce
 Change: 190092
 ServerID: perforce.ravenbrook.com
 2016-03-15 11:18:27 +00:00
Richard Brooksby
d54be414d9 Merging branch/2016-03-12/pause into the master sources. 
Copied from Perforce
 Change: 190053
 ServerID: perforce.ravenbrook.com
 2016-03-15 06:31:08 +00:00
Gareth Rees
2a3c4e0590 Address points made by rb in review <https://info.ravenbrook.com/mail/2016/03/14/18-48-19/0/> 
Copied from Perforce
 Change: 190031
 ServerID: perforce.ravenbrook.com
 2016-03-14 20:10:14 +00:00
Richard Brooksby
1025b28674 Eliminating withreservoirpermit and all its variants. 
Copied from Perforce
 Change: 190005
 ServerID: perforce.ravenbrook.com
 2016-03-13 21:04:01 +00:00
Richard Brooksby
cc6262ae66 Basic removal of the reservoir pool from code and design. 
Copied from Perforce
 Change: 190000
 ServerID: perforce.ravenbrook.com
 2016-03-13 20:32:24 +00:00
Gareth Rees
459a9f775d Implement pause time control. 
Copied from Perforce
 Change: 189921
 ServerID: perforce.ravenbrook.com
 2016-03-12 22:08:26 +00:00
Richard Brooksby
bb8869368c Storing the pointer to the stack frame where setjmp was invoked, rather than the address of the jump buffer, as the hot end of the mutator state, because callee-save registered might be stored on either side of the jump buffer by the compiler. 
Removing the unnecessary assumption that the stack ends are word-aligned.

Copied from Perforce
 Change: 189582
 ServerID: perforce.ravenbrook.com
 2016-03-03 17:12:43 +00:00
Richard Brooksby
f89e49acfe Catch-up merge from master sources to branch/2014-10-26/sc. 
Includes hairy merging of stack manipulation code and may need further work on each platform.

Copied from Perforce
 Change: 189545
 ServerID: perforce.ravenbrook.com
 2016-03-02 17:55:25 +00:00
Richard Brooksby
888e5214d4 Removing poolmv.h and redundant code now that mv has no internal clients. 
Copied from Perforce
 Change: 189465
 ServerID: perforce.ravenbrook.com
 2016-03-01 01:55:39 +00:00