This list may include some issues incorrectly, because "p4 fixes -i" does not report a fix for a version branch if the files changed by the fix were deleted on the masters before the version branch was taken.
| Job | Priority | Title |
|---|---|---|
| job000537 | optional | Many design documents missing |
| job000538 | optional | Project documents are poorly formatted |
| job000543 | nice | No MPS programmer's guide |
| job000546 | essential | MPS docs say P4DTI instead of MPS |
| job000548 | nice | AMS grain colour doesn't agree with design doc |
| job000549 | optional | Blackening an AMS segment can break |
| job000602 | essential | Mac OS X 10.2 build fails because "cabs" is already defined |
| job000668 | essential | Build procedure uses p4 counter change which is unsafe |
| job000814 | nice | Configura cannot manage Lightworks objects with the MPS |
| job000973 | essential | MPS doesn't compile under Mac OS X 10.3.4 |
| job001092 | optional | MPS is not integrated with public cool projects. |
| job001150 | optional | MPS doesn't provide enough feedback information about what it is doing or what it has done |
| job001151 | optional | Format methods can't look at other data |
| job001152 | optional | The MPS can't be used to simulate a smaller machine |
| job001155 | essential | full collects cause gigantic ramps |
| job001161 | nice | there is no human-helpful map of MPS files |
| job001357 | nice | Configura cannot use Win32 fibers |
| job001367 | essential | MPS lacks walkthrough example code (aka "hello-world") for beginners |
| job001369 | nice | MPS proc/release-build omits step: update main MPS index page |
| job001571 | nice | MPS multiple traces would not work |
| job001659 | optional | Culprit analysis is too hard. |
| job001666 | optional | No guarantee that all weak references to an object die together. |
| job001676 | nice | AMC does not implement weakness in emergency fixing. |
| job001681 | nice | AMCHeaderFix is an unnecessary copy. |
| job001707 | optional | VM Arena never shrinks a generation zone set preferences. |
| job001708 | nice | VM Arena's segment placement policy could be improved. |
| job001709 | nice | VM Arena uses up zones too quickly. |
| job001715 | nice | MPS fails to lower barrier when hit: multiple hits cause slowdown (CONJECTURE) |
| job001789 | nice | MPS auto_header format is not tested by main test files |
| job001887 | optional | MPS mps_arena_committed() is wrong when using mps_arena_class_cl (client arena) |
| job002175 | optional | MPS unaligned references are not detected by AMC pools |
| job003324 | nice | Manual contains little about performance of interface |
| job003325 | nice | Purpose of the "class" method of an object format is unclear |
| job003327 | nice | Purpose of reservoirs is unclear |
| job003328 | nice | Possible improvement to reserve/commit protocol |
| job003344 | nice | Purpose of allocation frames/SNC pool class are unclear |
| job003348 | optional | Unclear what happens if a thread dies while registered |
| job003352 | optional | Instruction emulation not supported on OS X or x86-64 |
| job003357 | nice | AWL is awkward to use |
| job003371 | essential | MPS spends too much time making system calls |
| job003374 | nice | No documentation about low memory situations |
| job003384 | optional | Collector goes mad when low on address space |
| job003387 | optional | Multiple arenas can corrupt telemetry stream |
| job003388 | optional | telemetry system API can corrupt telemetry stream |
| job003434 | essential | Incorrect glossary link from "committed" to "mapping" |
| job003439 | optional | MPS is too hard to use |
| job003448 | nice | mps_arena_vm_growth is not documented |
| job003455 | optional | Frequent ramps can mess up the ramping algorithm and cause performance problems |
| job003477 | optional | MPS is hard to build and debug on Windows |
| job003482 | nice | Test suite doesn't test error paths |
| job003484 | nice | MPS has predictable address space layout |
| job003485 | optional | Information about cause of errors is lost |
| job003486 | essential | mv2test failure |
| job003490 | nice | Assertion failure in MRGDescribe |
| job003493 | nice | No recovery mode after assertion failure |
| job003495 | optional | Assertion failure if you try to create a small arena |
| job003499 | critical | The MPS issues list looks scary |
| job003502 | nice | Race condition in EventInit() |
| job003505 | optional | MPS incurs large overhead on barrier hits |
| job003508 | nice | Little in manual about in-band headers |
| job003513 | optional | Arena extension callbacks are undocumented |
| job003515 | nice | Can't collect diverse MPS messages in order |
| job003523 | optional | Accessing to weak tables on 64-bit causes them to be scanned. |
| job003525 | optional | Pointers from MPS stack pin down user objects |
| job003532 | optional | MPS kit fails to install shared libraries |
| job003535 | nice | Thread suspension interface is hacky, error-prone |
| job003539 | optional | MPS pause times are not well regulated |
| job003559 | nice | Multiple thread registration does not work on all platforms |
| job003632 | nice | Difficult to integrate with application that has non-atomic updates |
| job003635 | nice | Poor error message if you fail to specify a required keyword argument |
| job003639 | nice | Unclear why StackProbeDEPTH is 500 |
| job003644 | optional | Reserve/commit protocol does not cope with exceptions |
| job003653 | nice | Scanner makes no use of __builtin_prefetch |
| job003660 | nice | Asssertion "ring->next != NULL" in ztfm test |
| job003668 | essential | Stack scanner assumes all references are word-aligned |
| job003671 | nice | Non-moving pools don't make best use of zones |
| job003674 | essential | Hysteresis overwhelmed by allocation |
| job003683 | optional | Epoch number can wrap around on 32-bit platforms |
| job003693 | nice | The "method" suffix on MPS types is applied too widely |
| job003713 | nice | Inconvenient to add new parts on Windows |
| job003719 | nice | Hard to test and debug threading behaviour |
| job003738 | nice | Assertion in mps_arena_formatted_objects_walk if you have an AMS pool |
| job003742 | nice | Root modes not in sync |
| job003750 | nice | No keyword arguments for arena commit limit |
| job003755 | optional | Telemetry tools not regularly tested |
| job003758 | nice | The MPS does not build with gcc -Wconversion |
| job003762 | nice | steptest is too slow for a smoke test |
| job003763 | nice | No easy way to automatically clear freed memory |
| job003764 | optional | Scanning rate is way too high |
| job003766 | nice | Splitting and merging complicates writing new seg classes |
| job003768 | nice | Unclear if lockli is required |
| job003769 | nice | README out of date wrt WOW64 on Windows 7 |
| job003770 | nice | MPS does not compile from C++ |
| job003780 | optional | No test case for register scanning |
| job003781 | nice | No automated performance test |
| job003783 | optional | ChainCondemnAuto condemns too many generations |
| job003784 | nice | mps_class_t is mis-named |
| job003786 | nice | No automated test of the event subsystem |
| job003789 | nice | MPS does not try collecting when out of memory |
| job003790 | optional | Segment descriptors could be more efficiently managed |
| job003791 | nice | Can't set the rank on an AMC/AMCZ allocation point |
| job003792 | nice | AMS and AWL don't update summaries of condemned segments |
| job003794 | optional | Hard to predict the mortality in a generation |
| job003795 | nice | Arena extensions are not adaptive |
| job003796 | optional | White segment lookup is slow |
| job003797 | optional | AMC space is lost to pinning |
| job003798 | optional | Tract tables are inflexible |
| job003799 | optional | Incrementally collecting the nursery may waste time |
| job003802 | nice | Manual unclear about exact collection |
| job003803 | nice | Hard to discover roots |
| job003805 | nice | Bit table scanning is unoptimized |
| job003813 | optional | TraceReclaim looks at every segment |
| job003814 | nice | {VM,Client}ArenaReserved iterates over the chunks |
| job003815 | optional | Freeing a page never destroys a chunk |
| job003816 | nice | Can't specify generation per allocation point |
| job003820 | nice | Scheme interpreter table_set is wrong |
| job003832 | optional | CVM memory debugging may be redundant |
| job003835 | nice | SegPrefs are poorly named |
| job003836 | nice | PageRetStruct is obsolete |
| job003837 | nice | No control over which objects are "large" |
| job003838 | nice | MVT uses segments unnecessarily |
| job003839 | nice | No benchmarks for space performance |
| job003841 | optional | Segs are not Exposed when AMSBlacken calls amsIterate |
| job003842 | nice | Missing dependencies in nmake build system |
| job003847 | nice | Allocation clock inconsistency in handling of AMC segment padding |
| job003848 | optional | Access violation in gcbench on Windows |
| job003852 | nice | No heap consistency checker |
| job003858 | nice | Allocating segments in control pool has a bad complexity |
| job003859 | nice | Assertion failures in amcssth |
| job003863 | nice | mps_io_* functions are misleadingly named |
| job003864 | nice | Uncollected finalization messages lead to retention |
| job003865 | nice | Unfinalizable objects can be registered for finalization |
| job003866 | nice | mps_arena_has_addr fails for address in unsegmented pool classes |
| job003867 | nice | RankAMBIG is misleadingly used to mean "minimum rank" |
| job003868 | nice | Test function/228.c doesn't detect assertions |
| job003869 | nice | Reservoir refuses to supply memory |
| job003870 | essential | Can't set MPS_KEY_SPARE |
| job003871 | nice | MMQA test function/165.c failure |
| job003872 | nice | MMQA test function/167.c failure |
| job003873 | nice | MMQA test function/136.c failure |
| job003874 | nice | MMQA test function/214.c failure |
| job003875 | nice | MMQA test function/45.c failure |
| job003876 | nice | MMQA test function/170.c failure |
| job003877 | nice | MMQA test function/148.c failure |
| job003878 | optional | SNC pool class missing from file-at-a-time builds |
| job003879 | optional | SNC not tested by main test suite |
| job003880 | optional | SNC does not implement size interface |
| job003881 | nice | SNC never returns memory to the arena |
| job003882 | optional | sncss test failure |
| job003883 | optional | SNC walks and scans dead objects |
| job003884 | essential | mps_pool_free_size wrong for AWL, LO in hot variety |
| job003885 | nice | Unclear when to use AVERT in mpsi.c |
| job003887 | optional | LD functions don't check their arena argument |
| job003889 | nice | No error if you destroy a format that's still in use by a pool |
| job003890 | nice | No error if you create a pool using a format from another arena |
| job003892 | nice | Pool statistics are not used |
| job003893 | essential | Arena contracted callback gets called with invalid arena |
| job003894 | nice | Intrinsic functions not used on Windows |
| job003895 | nice | No interface to logging control |
| job003898 | optional | Spare committed memory in the wrong zones prevents allocation |
| job003899 | optional | VMArenaGrow can return RESOURCE instead of COMMIT_LIMIT |
| job003900 | nice | Can't run tests with ASLR turned off |
| job003901 | nice | Can't run a single test under the test runner |
| job003902 | nice | commpre/commpost distinction is unnecessary |
| job003905 | nice | Can't build the MPS in parallel |
| job003906 | nice | Not clear whether pointers should be stored in client or base form |
| job003908 | optional | Not clear that an assertion handler must not call the MPS |
| job003911 | essential | Can't dump stack from assertion handler |
| job003915 | nice | Manual in master sources offers download for nonexistent release |
| job003917 | optional | Clear x86 direction flag in exception handler |
| job003918 | nice | MVInit can fail without destroying its block pool |
| job003919 | nice | No interface for getting bytes allocated |
| job003921 | optional | Write barrier may be harmful to performance |
| job003922 | optional | Failed arena creation is not correctly unwound |
| job003923 | optional | Client arena fails to detect too-small size |
| job003924 | nice | Unnecessary allocation during arena creation |
| job003925 | nice | No test case for removing chunks from the arena |
| job003926 | optional | Policy is hard to work on |
| job003927 | nice | No bootstrap design |
| job003928 | nice | VM arena uses two VMs when one might do |
| job003929 | optional | mps_arena_step uses poor estimate of collection time |
| job003930 | nice | Unnamed constants in arenaShouldCollectWorld |
| job003931 | nice | Manual claims SNC allocation point requires MPS_KEY_RANK |
| job003932 | optional | Allocation frame documentation is unclear |
| job003933 | nice | ArenaPark does not accumulate trace metrics |
| job003934 | nice | mps_arena_step may fail to collect world even if it had time |
| job003935 | nice | ArenaAvail fails to check its result |
| job003936 | nice | Type confusion in work computation |
| job003937 | essential | MRG pool does not update scannedSize |
| job003938 | optional | Useless traces are started and progressed |
| job003939 | nice | No AccessSetCheck |
| job003941 | nice | Configuration parameters are uncommented |
| job003942 | optional | Possible hang in steptest |
| job003943 | nice | No consistent way to discover arena configuration |
| job003944 | optional | Arena allocation policy may allocate in blacklisted zone |
| job003945 | nice | Easy to mistakenly omit to enable finalization messages |
| job003946 | nice | Assertions missing from the manual |
| job003947 | nice | Allocation frame protocol not safe for general pools |
| job003949 | nice | No glossary entry for telemetry system |
| job003950 | nice | Manual not compatible with Sphinx 1.3.1 |
| job003951 | essential | clean-up after assertion failure may fail re-entering the MPS |
| job003953 | optional | Definalization doesn't scale |
| job003954 | optional | Arena allocation policy does not interact intelligently with the reserve pool |
| job003955 | optional | No regression test for job003898 |
| job003956 | essential | MPS doesn't build on FreeBSD 10 |
| job003957 | optional | MutatorFaultContext interface is inconsistent and incomplete |
| job003960 | optional | No way to get live information about the behaviour of the MPS |
| job003961 | optional | Regular testing omits the Scheme example |
| job003962 | optional | Regular testing omits the MMQA test suite |
| job003963 | optional | Address-based hash table design is not stress-tested |
| job003964 | nice | lo.h is misnamed |
| job003965 | nice | AMS has extra implementation poolamsi.c |
| job003966 | nice | No design for clock.h |
| job003967 | nice | chain.h and locus.c have mis-matching names |
| job003968 | nice | Warnings when building manual with Sphinx 1.3.5 |
| job003969 | optional | Event clock implementation may not be reliable |
| job003970 | optional | The MPS can't scan in parallel with the mutator |
| job003971 | essential | No automatic feedback about overheads of "hot" versus "rash" MPS |
| job003972 | nice | MMQA function/226.c gets stuck in the hot variety |
| job003973 | nice | rootCreate doesn't check its mode argument |
| job003974 | optional | StackContext and MutatorContext could be unified |
| job003975 | essential | Poor performance due to imbalance between protection and scanning costs |
| job003976 | optional | Can't scan parts of segments allocated by buffers |
| job003977 | optional | We maintain redundant NMAKE files |
| job003978 | nice | Too hard to experiment with different MPS parameters |
| job003979 | optional | Forwarding unnecessarily lowers the read barrier |
| job003980 | optional | Branching tool does not distinguish between private and public Git mappings |
| job003981 | optional | MPS does not benefit from huge TLB entries |
| job003984 | optional | Calling mps_clock frequently is bad for performance |
| job003985 | optional | The reservoir pool is entirely bogus |
| job003986 | optional | STATISTIC_DECL has rotted |
| job003987 | optional | Emergency collection is not documented |
| job003988 | optional | No continuous integration test for 32-bit MPS on Linux and OS X |
| job003989 | optional | On Windows, pause times are measured using clock(), which is wall-clock time |
| job003990 | nice | MPS doesn't notice if clients write scanners that don't check error codes |
| job003991 | nice | No validation tests for client formats. |
| job003992 | optional | MAX_SIZE means different things to MV and MVT pools |
| job003993 | optional | Restrictions on maximum pool alignment are not checked or documented |
| job003994 | essential | MPS_TELEMETRY_CONTROL may introduce security risks |
| job003995 | optional | MPS doesn't support debugging APs |
| job003997 | optional | Can't run MMQA test suite on Windows |
| job003998 | essential | Growing an arena can allocate a chunk with no memory |
| job003999 | optional | Manually managed address space is only returned to the operating system via a trace |
| job004000 | optional | MPS condemns too many segments and takes too long to find them |
| job004001 | optional | No representation of the set of generations condemned by a trace |
| job004002 | optional | Can't implement incremental condemn |
| job004004 | optional | mps_arena_pause_time and mps_arena_pause_time_set are not covered |
| job004005 | nice | Destroying an automatically managed pool does not check that the arena is parked |
| job004006 | essential | CVM postmortem debugging support is not properly integrated into the MPS |
| job004007 | essential | Policy gets stuck when buffers exceed capacity of generation |
| job004008 | optional | AMSSegMerge loses buffer on high segment |
| job004009 | nice | Can't split a segment if buffer is above the split point |
| job004010 | optional | No check that collecting a generation reduces its "new size" to zero |
| job004011 | essential | Policy gets stuck when the live set triggers the dynamic criterion |
| job004012 | nice | No function SegHasBuffer |
| job004016 | optional | AMC pool may scan parts buffered segments many times |
| job004017 | optional | MVFF is slow in the hot variety |
| job004018 | essential | Documentation (and test cases) are wrong about mps_collections |
| job004019 | essential | Can't handle access violation if arena is locked |
| job004020 | nice | Running and debugging MMQA test cases is laborious |
| job004021 | essential | Computed chunk size assertion may fail |
| job004022 | optional | Mutator is suspended while the foundation is discovered |
| job004023 | optional | Summary-based write barrier invariant won't cope with pre-flip scanning |
| job004024 | nice | Accounting overheads are too high on mark & sweep pools |
| job004025 | nice | Duplicate code between pool classes |
| job004026 | essential | Failed shield assertions with DEEP checking |
| job004027 | essential | Memory corruption due to multiple arenas in multiple threads |
| job004028 | optional | fotest fails with DEEP checking |
| job004029 | essential | mpsicv fails with DEEP checking |
| job004030 | optional | Failed shield assertion in finalization tests with deep checking |
| job004035 | optional | Thread roots not suitable for user-level threads |
| job004036 | essential | Assertion failure in RootCheck with root of type RootTHREAD |
| job004037 | essential | Compilation of apss.c fails with GCC 6.1 |
| job004038 | nice | Hard to keep "Common assertions" up to date |
| job004039 | nice | Mistakes and omissions in the manual |
| job004040 | essential | Use of uninitialized variable in ProtThreadRegister on XC |
| job004041 | essential | Assertion failure in fotest on ananll |
| job004042 | essential | Assertion failure in apss on w3i3mv |
| job004043 | essential | Assertion failure in apss on xci3ll |
| job004044 | essential | MMQA function/150.c fails in hot variety on lii6ll |
| job004045 | optional | MMQA test suite fails on FreeBSD |
| job004046 | optional | Assertion failure in ananmv |
| job004047 | nice | Inconvenient to run multiple MMQA testsets |
| job004048 | optional | MMQA test cases fail on w3i6mv |
| job004049 | essential | Allocation between whiten and reclaim/detach is not accounted as condemned |
| job004055 | optional | Documentation for mps_root_create_area_tagged is incorrect |
| job004056 | optional | lockEnsureGlobalLock is not thread-safe on Windows |
| job004057 | nice | Warning pragmas are not localised around the bad cases |
| job004061 | essential | Manual does not build with Sphinx 1.6 |
| job004062 | optional | fork() unsupported on FreeBSD, Linux and macOS |
| job004063 | nice | Easy to miss mps_addr_pool |
| job004065 | optional | Scan area functions not flexible enough |
| job004066 | nice | Thread-handling functions could do more checking |
| job004067 | nice | Telemetry interacts poorly with fork |
| job004068 | nice | Duplicate thread-management code |
| job004069 | nice | macOS thread registration guard is ineffective and unnecessary |
| job004070 | optional | LO and AWL pools fail to detect invalid exact references |
| job004072 | optional | MRG segments needlessly set the write barrier |
| job004073 | nice | wasMarked protocol is unnecessarily complex |
| job004074 | optional | mps_definalize might not work |
| job004076 | essential | MPS does not compile with GCC 7 |
| job004077 | nice | No test cases for bogus arguments to mps_finalize |
| job004078 | nice | Typedefs use int when unsigned would be better |
| job004080 | nice | Telemetry output not appropriate for interactive use |
| job004081 | nice | Event descriptions are in a mess |
| job004082 | optional | ztfm.c does not compile with Microsoft Visual C 2015 |
| job004083 | nice | ChainCreate calls ControlAlloc twice |
| job004084 | optional | MMQA test function/232.c crashes |
| job004085 | optional | MPS doesn't cooperate well with other SEGV handlers |
| job004086 | essential | Assertion failure in amssshe |
| job004087 | nice | GenDescCondemned should check that some bytes were condemned |
| job004088 | nice | Can't destroy an allocation point with a reserve |
| job004089 | nice | No smoke test coverage of mps_arena_roots_walk |
| job004090 | optional | Walking the roots means you can't walk the formatted objects |
| job004091 | nice | No support for saving and restoring automatically managed memory |
| job004092 | nice | MMQA test cases fail on 32-bit platforms |
| job004093 | optional | Predicted mortality is bogus for collection of the world |
| job004094 | optional | Trace mortality prediction is bogus |
| job004095 | nice | No need for two classes of MRG segment |
| job004096 | optional | MMQA fails to handle assertion failures |
| job004097 | optional | MMQA ignores assertions in tests with OUTPUT_SPEC |
| job004098 | optional | Use of clock() is not fork-safe |
| job004099 | optional | Monitor not usable for long-running processes |
| job004100 | optional | Inconsistent linearization of event times |
| job004101 | nice | Plain CBS doesn't work |
| job004102 | optional | arenaFreeLandInsertSteal might pass an empty range to LandInsert |
| job004103 | nice | No smoke test coverage of mapping failure in pagesMarkAllocated |
| job004104 | nice | fotest fails with "arena commit limit exceeded" |
| job004105 | optional | Time and space overheads are high |
| job004106 | nice | mps_collections doesn't count all collections. |
| job004107 | nice | Debugging chapter is out of date |
| job004108 | essential | MPS does not build with Xcode 10.0 |
| job004109 | nice | Hash table advice does not mention sets |
| job004113 | essential | MPS does not compile with GCC 7.3 |
| job004142 | nice | MPS sources contain links to private documents |
| job004147 | nice | MMQA test function/167.c fails on w3i6mv |
| job004148 | nice | MMQA relies on deprecated API mps_tramp |
| job004149 | nice | MMQA tests conerr/60.c to conerr/68.c fail on w3i6mv |
| job004156 | essential | MPS does not compile with GCC 8.3 |
| job004158 | essential | Register scanning approach is not reliable |
| job004161 | optional | tagtest fails on lii6gc |
| job004162 | essential | MPS does not compile with Clang 6.0.0 |
| job004163 | optional | Scheme example does not build with Clang 11 |
| job004164 | nice | Warning from GCC |
| job004165 | critical | MPS is to be BSD 2-clause licenced. |
| job004166 | essential | MPS Contributing agreement requires review and update |