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292 commits

Author SHA1 Message Date
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
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
Richard Brooksby
efb1d94578 Catch-up merge from master sources to branch/2016-04-08/protidying. 
Copied from Perforce
 Change: 191471
 ServerID: perforce.ravenbrook.com
 2016-04-21 14:46:10 +01:00
Gareth Rees
aba1c55487 Catch-up merge from master sources to branch/2016-04-12/job004000. 
Copied from Perforce
 Change: 191429
 ServerID: perforce.ravenbrook.com
 2016-04-21 10:52:18 +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
Richard Brooksby
2071adc5fe Removing unused (and useless) poolfix macro. 
Copied from Perforce
 Change: 191407
 ServerID: perforce.ravenbrook.com
 2016-04-21 08:59:52 +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
Richard Brooksby
32250731d7 Avoid using "class" as an identifier, since tools like lldb parse expressions as c++, and it can't be named. 
Copied from Perforce
 Change: 191304
 ServerID: perforce.ravenbrook.com
 2016-04-19 23:00:02 +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
Richard Brooksby
06ef28892a Catch-up merge from master sources to branch/2016-04-08/protidying. 
Copied from Perforce
 Change: 191251
 ServerID: perforce.ravenbrook.com
 2016-04-19 16:37:51 +01:00
Richard Brooksby
c708f93154 Eliminating classdef.h by defining the class level when declaring a class. 
Copied from Perforce
 Change: 191235
 ServerID: perforce.ravenbrook.com
 2016-04-19 14:59:30 +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
Gareth Rees
9c475dcfbc Merge branch/2015-08-11/compact into the master sources. 
Copied from Perforce
 Change: 191113
 ServerID: perforce.ravenbrook.com
 2016-04-14 12:49:13 +01:00
Gareth Rees
c97f77e5ab Catch-up merge from master sources to branch/2014-10-11/snc. 
Copied from Perforce
 Change: 191065
 ServerID: perforce.ravenbrook.com
 2016-04-13 13:07:19 +01:00
Gareth Rees
7eeb2e8b78 Condemn only the segments in the selected generations (not segments that happen to share a zone with any segment ever allocated in the generation). 
Copied from Perforce
 Change: 191034
 ServerID: perforce.ravenbrook.com
 2016-04-12 19:42:03 +01:00
Gareth Rees
2b4b4816b4 Keep a ring of segments for each generation. 
Copied from Perforce
 Change: 191031
 ServerID: perforce.ravenbrook.com
 2016-04-12 19:16:19 +01:00
Richard Brooksby
14da33f5e9 Moving setclassofpoly to after initialization, to be more like signature setting. partially complete. 
Copied from Perforce
 Change: 190992
 ServerID: perforce.ravenbrook.com
 2016-04-12 13:15:54 +01:00
Richard Brooksby
e7d5490d11 Automatically setting pool->fix on first fix, to avoid tricky initialization. 
Copied from Perforce
 Change: 190986
 ServerID: perforce.ravenbrook.com
 2016-04-12 12:44:54 +01:00
Richard Brooksby
d31995246d Making classes into instances of kinds, allowing subclass tests to be used to validate classes as well. 
Copied from Perforce
 Change: 190958
 ServerID: perforce.ravenbrook.com
 2016-04-11 20:58:39 +01:00
Richard Brooksby
12d4dfda16 Eliminating generated classof* and setclassof* functions in favour of checked poly macros. 
Copied from Perforce
 Change: 190938
 ServerID: perforce.ravenbrook.com
 2016-04-11 18:06:47 +01:00
Richard Brooksby
964cd6147f Checking that classes are the right kind using signatures. 
Copied from Perforce
 Change: 190936
 ServerID: perforce.ravenbrook.com
 2016-04-11 17:38:47 +01:00
Gareth Rees
7660e38f3e Catch-up merge from master sources to branch/2015-08-11/compact. 
Copied from Perforce
 Change: 190901
 ServerID: perforce.ravenbrook.com
 2016-04-11 14:40:44 +01:00
Richard Brooksby
c4ef464d0e Using superclass init and finish in the arena bootstrap and teardown. 
Copied from Perforce
 Change: 190895
 ServerID: perforce.ravenbrook.com
 2016-04-11 13:35:16 +01:00
Richard Brooksby
c77c4a6a63 Removing class typedefs made redundant by kinds. 
Copied from Perforce
 Change: 190894
 ServerID: perforce.ravenbrook.com
 2016-04-11 09:54:29 +01:00
Richard Brooksby
3dd201bf47 Turning pool init methods the right way in, so that they each call the next method up the class hierarchy. 
Copied from Perforce
 Change: 190858
 ServerID: perforce.ravenbrook.com
 2016-04-10 17:49:08 +01:00
Richard Brooksby
3154cbed7d Making arenas properly inherit from instances, and converting remaining method calls to use the method macro, while noting uses which are inside-out. 
Copied from Perforce
 Change: 190856
 ServerID: perforce.ravenbrook.com
 2016-04-10 14:00:55 +01:00
Richard Brooksby
a56de59509 Generating type-safe functions for getting and setting the class of instances. 
Fixing warning revealed by GCC that I wasn't actually checking classes after init.
Fixing abstract classes so that they pass their own checks!

Copied from Perforce
 Change: 190837
 ServerID: perforce.ravenbrook.com
 2016-04-08 19:50:12 +01:00