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* Use a uniform return convention in bytecode for unary resultsAlexis King2023-05-131-2/+0
| | | | fixes #22958
* Add missing cases in -Di prettyprinterKrzysztof Gogolewski2023-04-111-0/+51
| | | | Fixes #23142
* rts: Encapsulate access to capabilities arrayBen Gamari2022-12-161-2/+2
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* rts: Introduce getNumCapabilitiesBen Gamari2022-12-161-4/+4
| | | | | | And ensure accesses to n_capabilities are atomic (although with relaxed ordering). This is necessary as RTS API callers may concurrently call into the RTS without holding a capability.
* Add native delimited continuations to the RTSAlexis King2022-09-111-2/+14
| | | | | | | | | | | | | | | | | | | | | This patch implements GHC proposal 313, "Delimited continuation primops", by adding native support for delimited continuations to the GHC RTS. All things considered, the patch is relatively small. It almost exclusively consists of changes to the RTS; the compiler itself is essentially unaffected. The primops come with fairly extensive Haddock documentation, and an overview of the implementation strategy is given in the Notes in rts/Continuation.c. This first stab at the implementation prioritizes simplicity over performance. Most notably, every continuation is always stored as a single, contiguous chunk of stack. If one of these chunks is particularly large, it can result in poor performance, as the current implementation does not attempt to cleverly squeeze a subset of the stack frames into the existing stack: it must fit all at once. If this proves to be a performance issue in practice, a cleverer strategy would be a worthwhile target for future improvements.
* Use Info Table Provenances to decode cloned stack (#18163)Sven Tennie2021-09-231-1/+1
| | | | | | | | | | | | | | | | Emit an Info Table Provenance Entry (IPE) for every stack represeted info table if -finfo-table-map is turned on. To decode a cloned stack, lookupIPE() is used. It provides a mapping between info tables and their source location. Please see these notes for details: - [Stacktraces from Info Table Provenance Entries (IPE based stack unwinding)] - [Mapping Info Tables to Source Positions] Metric Increase: T12545
* Move `/includes` to `/rts/include`, sort per package betterJohn Ericson2021-08-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | In order to make the packages in this repo "reinstallable", we need to associate source code with a specific packages. Having a top level `/includes` dir that mixes concerns (which packages' includes?) gets in the way of this. To start, I have moved everything to `rts/`, which is mostly correct. There are a few things however that really don't belong in the rts (like the generated constants haskell type, `CodeGen.Platform.h`). Those needed to be manually adjusted. Things of note: - No symlinking for sake of windows, so we hard-link at configure time. - `CodeGen.Platform.h` no longer as `.hs` extension (in addition to being moved to `compiler/`) so as not to confuse anyone, since it is next to Haskell files. - Blanket `-Iincludes` is gone in both build systems, include paths now more strictly respect per-package dependencies. - `deriveConstants` has been taught to not require a `--target-os` flag when generating the platform-agnostic Haskell type. Make takes advantage of this, but Hadrian has yet to.
* Make `PosixSource.h` installed and under `rts/`John Ericson2021-08-091-1/+1
| | | | | | is used outside of the rts so we do this rather than just fish it out of the repo in ad-hoc way, in order to make packages in this repo more self-contained.
* Generate GHCi bytecode from STG instead of Core and support unboxedLuite Stegeman2021-03-201-15/+45
| | | | | | tuples and sums. fixes #1257
* Print RET_BIG stack closuresSven Tennie2020-09-251-7/+13
| | | | | | | | | A RET_BIG closure has a large bitmap that describes it's payload and can be printed with printLargeBitmap(). Additionally, the output for payload closures of small and big bitmaps is changed: printObj() is used to print a bit more information about what's on the stack.
* rts: Fix printClosure when printing fwd ptrsÖmer Sinan Ağacan2020-03-141-1/+1
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* Make printer untag when chasing a pointer in a RET_FUN frameSiddharth Bhat2019-07-041-1/+1
| | | | | This is to mimic what `Scav.c` does. This should fix a crash in the printer.
* [skip ci] add a blurb about the purpose of Printer.cSiddharth Bhat2019-06-261-1/+2
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* rts/Printer: Print forwarding pointersÖmer Sinan Ağacan2019-03-051-3/+8
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* rts/Printer: Introduce a few more printing utilitiesÖmer Sinan Ağacan2019-03-051-0/+71
| | | | | These include printLargeAndPinnedObjects, printWeakLists, and printStaticObjects. These are generally useful things to have.
* rts.cabal.in: force inclusion of findPtr/_findPtr symbol only with debug flagAlp Mestanogullari2018-11-221-8/+3
| | | | | | | | | | | | | | | | | The previous strategy caused problems on Windows, as pointed out at [1] [1]: https://phabricator.haskell.org/rGHC900c47f88784#133905 Reviewers: Phyx, bgamari, erikd, simonmar Reviewed By: Phyx Subscribers: rwbarton, carter GHC Trac Issues: #15671 Differential Revision: https://phabricator.haskell.org/D5356
* rts/Printer.c: always define the findPtr symbolAlp Mestanogullari2018-09-121-3/+8
| | | | | | | | | | | | | | | | | | It was previously only defined (and therefore shipped) when DEBUG is defined. This patch defines it regardless of DEBUG. This will help fix hadrian on OS X [1]. [1]: https://github.com/snowleopard/hadrian/issues/614 Test Plan: The error from hadrian#614 is gone Reviewers: bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, carter Differential Revision: https://phabricator.haskell.org/D5138
* findPtr: don't search the nurserySimon Marlow2018-06-191-0/+13
| | | | | | | | | | | | Test Plan: Used it in anger Reviewers: bgamari, erikd Reviewed By: bgamari Subscribers: rwbarton, thomie, carter Differential Revision: https://phabricator.haskell.org/D4873
* Rename some mutable closure types for consistencyÖmer Sinan Ağacan2018-06-051-8/+8
| | | | | | | | | | | | | | | | | | | | | | | SMALL_MUT_ARR_PTRS_FROZEN0 -> SMALL_MUT_ARR_PTRS_FROZEN_DIRTY SMALL_MUT_ARR_PTRS_FROZEN -> SMALL_MUT_ARR_PTRS_FROZEN_CLEAN MUT_ARR_PTRS_FROZEN0 -> MUT_ARR_PTRS_FROZEN_DIRTY MUT_ARR_PTRS_FROZEN -> MUT_ARR_PTRS_FROZEN_CLEAN Naming is now consistent with other CLEAR/DIRTY objects (MVAR, MUT_VAR, MUT_ARR_PTRS). (alternatively we could rename MVAR_DIRTY/MVAR_CLEAN etc. to MVAR0/MVAR) Removed a few comments in Scav.c about FROZEN0 being on the mut_list because it's now clear from the closure type. Reviewers: bgamari, simonmar, erikd Reviewed By: simonmar Subscribers: rwbarton, thomie, carter Differential Revision: https://phabricator.haskell.org/D4784
* Move printMutableList to Printer.c next to other printersÖmer Sinan Ağacan2018-05-301-7/+15
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* Handle TREC_CHUNK in printClosureÖmer Sinan Ağacan2018-05-301-0/+3
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* Factor stack chunk printing out of printTSOÖmer Sinan Ağacan2018-05-291-2/+6
| | | | Makes it possible to print STACK (StgStack) objects easily in gdb
* printStackChunk: recognise a few more ret framesÖmer Sinan Ağacan2018-05-061-0/+12
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* rts: fix format arguments for debugBelch calls on 32-bit systemsSergei Trofimovich2018-04-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | This change fixes build failure like this: ``` rts/Stats.c:1467:14: error: error: format '%u' expects argument of type 'unsigned int', but argument 4 has type 'long unsigned int' [-Werror=format=] debugBelch("%51s%9" FMT_Word " %9" FMT_Word "\n", ^~~~~~~~ "",tot_live*sizeof(W_),tot_slop*sizeof(W_)); ~~~~~~~~~~~~~~~~~~~ ``` The fix is to cast sizeof() result to Word (W_). Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Test Plan: build for 32-bit target Reviewers: bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: thomie, carter Differential Revision: https://phabricator.haskell.org/D4608
* Add a forgotten newline in a debug printÖmer Sinan Ağacan2018-04-101-1/+1
| | | | [skip ci]
* printClosure: slightly improve MVAR printingÖmer Sinan Ağacan2018-03-311-2/+24
| | | | | | | | | | Reviewers: bgamari, erikd, simonmar Reviewed By: bgamari Subscribers: thomie, carter Differential Revision: https://phabricator.haskell.org/D4541
* rts/Printer: add closure name entries for small arrays (Fixes #14513)Takano Akio2017-11-231-1/+10
| | | | | | | | | | | | | | Test Plan: ./validate Reviewers: bgamari, erikd, simonmar Reviewed By: bgamari Subscribers: rwbarton, thomie GHC Trac Issues: #14513 Differential Revision: https://phabricator.haskell.org/D4226
* Prefer #if defined to #ifdefBen Gamari2017-04-281-7/+7
| | | | Our new CPP linter enforces this.
* More fixes for #5654Simon Marlow2017-01-061-0/+5
| | | | | | | | | | | | | | * In stg_ap_0_fast, if we're evaluating a thunk, the thunk might evaluate to a function in which case we may have to adjust its CCS. * The interpreter has its own implementation of stg_ap_0_fast, so we have to do the same shenanigans with creating empty PAPs and copying PAPs there. * GHCi creates Cost Centres as children of CCS_MAIN, which enterFunCCS() wrongly assumed to imply that they were CAFs. Now we use the is_caf flag for this, which we have to correctly initialise when we create a Cost Centre in GHCi.
* Overhaul of Compact Regions (#12455)Simon Marlow2016-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This commit makes various improvements and addresses some issues with Compact Regions (aka Compact Normal Forms). This was the most important thing I wanted to fix. Compaction previously prevented GC from running until it was complete, which would be a problem in a multicore setting. Now, we compact using a hand-written Cmm routine that can be interrupted at any point. When a GC is triggered during a sharing-enabled compaction, the GC has to traverse and update the hash table, so this hash table is now stored in the StgCompactNFData object. Previously, compaction consisted of a deepseq using the NFData class, followed by a traversal in C code to copy the data. This is now done in a single pass with hand-written Cmm (see rts/Compact.cmm). We no longer use the NFData instances, instead the Cmm routine evaluates components directly as it compacts. The new compaction is about 50% faster than the old one with no sharing, and a little faster on average with sharing (the cost of the hash table dominates when we're doing sharing). Static objects that don't (transitively) refer to any CAFs don't need to be copied into the compact region. In particular this means we often avoid copying Char values and small Int values, because these are static closures in the runtime. Each Compact# object can support a single compactAdd# operation at any given time, so the Data.Compact library now enforces mutual exclusion using an MVar stored in the Compact object. We now get exceptions rather than killing everything with a barf() when we encounter an object that cannot be compacted (a function, or a mutable object). We now also detect pinned objects, which can't be compacted either. The Data.Compact API has been refactored and cleaned up. A new compactSize operation returns the size (in bytes) of the compact object. Most of the documentation is in the Haddock docs for the compact library, which I've expanded and improved here. Various comments in the code have been improved, especially the main Note [Compact Normal Forms] in rts/sm/CNF.c. I've added a few tests, and expanded a few of the tests that were there. We now also run the tests with GHCi, and in a new test way that enables sanity checking (+RTS -DS). There's a benchmark in libraries/compact/tests/compact_bench.hs for measuring compaction speed and comparing sharing vs. no sharing. The field totalDataW in StgCompactNFData was unnecessary. Test Plan: * new unit tests * validate * tested manually that we can compact Data.Aeson data Reviewers: gcampax, bgamari, ezyang, austin, niteria, hvr, erikd Subscribers: thomie, simonpj Differential Revision: https://phabricator.haskell.org/D2751 GHC Trac Issues: #12455
* Use C99's boolBen Gamari2016-11-291-4/+4
| | | | | | | | | | | | Test Plan: Validate on lots of platforms Reviewers: erikd, simonmar, austin Reviewed By: erikd, simonmar Subscribers: michalt, thomie Differential Revision: https://phabricator.haskell.org/D2699
* Remove CONSTR_STATICSimon Marlow2016-11-141-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: We currently have two info tables for a constructor * XXX_con_info: the info table for a heap-resident instance of the constructor, It has type CONSTR, or one of the specialised types like CONSTR_1_0 * XXX_static_info: the info table for a static instance of this constructor, which has type CONSTR_STATIC or CONSTR_STATIC_NOCAF. I'm getting rid of the latter, and using the `con_info` info table for both static and dynamic constructors. For rationale and more details see Note [static constructors] in SMRep.hs. I also removed these macros: `isSTATIC()`, `ip_STATIC()`, `closure_STATIC()`, since they relied on the CONSTR/CONSTR_STATIC distinction, and anyway HEAP_ALLOCED() does the same job. Test Plan: validate Reviewers: bgamari, simonpj, austin, gcampax, hvr, niteria, erikd Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2690 GHC Trac Issues: #12455
* rts/Printer.h: fix constness of argument declarationSergei Trofimovich2016-08-061-1/+1
| | | | | | | | | | | | | | | | | | Noticed on today's build failure: rts/Printer.c:659:13: error: error: conflicting types for 'DEBUG_LoadSymbols' extern void DEBUG_LoadSymbols( const char *name ) ^~~~~~~~~~~~~~~~~ In file included from rts/Printer.c:17:0: error: rts/Printer.h:29:13: error: note: previous declaration of 'DEBUG_LoadSymbols' was here extern void DEBUG_LoadSymbols( char *name ); ^~~~~~~~~~~~~~~~~ Signed-off-by: Sergei Trofimovich <siarheit@google.com>
* Compact RegionsGiovanni Campagna2016-07-201-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | This brings in initial support for compact regions, as described in the ICFP 2015 paper "Efficient Communication and Collection with Compact Normal Forms" (Edward Z. Yang et.al.) and implemented by Giovanni Campagna. Some things may change before the 8.2 release, but I (Simon M.) wanted to get the main patch committed so that we can iterate. What documentation there is is in the Data.Compact module in the new compact package. We'll need to extend and polish the documentation before the release. Test Plan: validate (new test cases included) Reviewers: ezyang, simonmar, hvr, bgamari, austin Subscribers: vikraman, Yuras, RyanGlScott, qnikst, mboes, facundominguez, rrnewton, thomie, erikd Differential Revision: https://phabricator.haskell.org/D1264 GHC Trac Issues: #11493
* Remove Printer.c:prettyPrintClosure()Ömer Sinan Ağacan2016-06-101-81/+0
| | | | | | | | | | | | | | It turns out this function was unused and broken for a long time (fixed with b0a7664). Removing it as it will probably get broken again in the future and it's unused. Reviewers: austin, erikd, simonmar, nomeata, bgamari Reviewed By: nomeata, bgamari Subscribers: Phyx, thomie, nomeata Differential Revision: https://phabricator.haskell.org/D2322
* prettyPrintClosure(): Untag the closure before accessing fieldsÖmer Sinan Ağacan2016-06-101-0/+2
| | | | (This fixes segfaults)
* rts: More const correct-ness fixesErik de Castro Lopo2016-05-181-24/+25
| | | | | | | | | | | | | | | | | | | | In addition to more const-correctness fixes this patch fixes an infelicity of the previous const-correctness patch (995cf0f356) which left `UNTAG_CLOSURE` taking a `const StgClosure` pointer parameter but returning a non-const pointer. Here we restore the original type signature of `UNTAG_CLOSURE` and add a new function `UNTAG_CONST_CLOSURE` which takes and returns a const `StgClosure` pointer and uses that wherever possible. Test Plan: Validate on Linux, OS X and Windows Reviewers: Phyx, hsyl20, bgamari, austin, simonmar, trofi Reviewed By: simonmar, trofi Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2231
* rts: Replace `nat` with `uint32_t`Erik de Castro Lopo2016-05-051-6/+8
| | | | | | | | | | | | The `nat` type was an alias for `unsigned int` with a comment saying it was at least 32 bits. We keep the typedef in case client code is using it but mark it as deprecated. Test Plan: Validated on Linux, OS X and Windows Reviewers: simonmar, austin, thomie, hvr, bgamari, hsyl20 Differential Revision: https://phabricator.haskell.org/D2166
* Remove unused IND_PERMJoachim Breitner2016-01-231-9/+1
| | | | | | | | | | | | | | | | | it seems that this closure type has not been in use since 5d52d9, so all this is dead and untested code. This removes it. Some of the code might be useful for a counting indirection as described in #10613, so when implementing that, have a look at what this commit removes. Test Plan: validate on harbormaster Reviewers: austin, bgamari, simonmar Reviewed By: simonmar Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1821
* Maintain cost-centre stacks in the interpreterSimon Marlow2015-12-211-40/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Breakpoints become SCCs, so we have detailed call-stack info for interpreted code. Currently this only works when GHC is compiled with -prof, but D1562 (Remote GHCi) removes this constraint so that in the future call stacks will be available without building your own GHCi. How can you get a stack trace? * programmatically: GHC.Stack.currentCallStack * I've added an experimental :where command that shows the stack when stopped at a breakpoint * `error` attaches a call stack automatically, although since calls to `error` are often lifted out to the top level, this is less useful than it might be (ImplicitParams still works though). * Later we might attach call stacks to all exceptions Other related changes in this diff: * I reduced the number of places that get ticks attached for breakpoints. In particular there was a breakpoint around the whole declaration, which was often redundant because it bound no variables. This reduces clutter in the stack traces and speeds up compilation. * I tidied up some RealSrcSpan stuff in InteractiveUI, and made a few other small cleanups Test Plan: validate Reviewers: ezyang, bgamari, austin, hvr Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1595 GHC Trac Issues: #11047
* s/StgArrWords/StgArrBytes/Siddhanathan Shanmugam2015-09-111-2/+2
| | | | | | | | | | Rename StgArrWords to StgArrBytes (see Trac #8552) Reviewed By: austin Differential Revision: https://phabricator.haskell.org/D1233 GHC Trac Issues: #8552
* rts/Printer.c: speed up '-Da' printer for 'LIBBFD' buildSergei Trofimovich2015-08-181-81/+11
| | | | | | | | | | | | | | | | | Patch switches from linear lookup in unordered array to a hash table lookup. When debugging GHC array contains 658_445 elements. Found performance gap when tried to debug blackholes. Signed-off-by: Sergei Trofimovich <siarheit@google.com> Reviewers: simonmar, austin, bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1150
* rts: unrust 'libbfd' debug symbols parserSergei Trofimovich2014-10-051-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Patch does the following: - fixes detection of working libbfd on modern linux platforms (where bfd_uncompress_section_contents is a macro) - disables 'bfd' by default and adds '--enable-bfd-debug' configure option. As bfd's ABI is unstable the feature is primarily useful by ghc hackers. Not done (subject for another patch): - one-time bfd object memory leak in DEBUG_LoadSymbols - in '-dynamic' mode debugging symbols are loaded only for current executable, not all libraries it is linked against. Fixes Issue #8790 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Test Plan: built unregisterised ghc on amd64 and ran './hello +RTS -Di' there Reviewers: simonmar, austin Reviewed By: simonmar, austin Subscribers: thomie, simonmar, ezyang, carter Differential Revision: https://phabricator.haskell.org/D193 GHC Trac Issues: #8790
* Revert "rts: add Emacs 'Local Variables' to every .c file"Simon Marlow2014-09-291-8/+0
| | | | This reverts commit 39b5c1cbd8950755de400933cecca7b8deb4ffcd.
* rts/Printer.c: update comments about using USING_LIBBFDSergei Trofimovich2014-09-021-2/+2
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* rts: Remove trailing whitespace and tabs from Printer.cAustin Seipp2014-08-101-196/+196
| | | | Signed-off-by: Austin Seipp <austin@well-typed.com>
* rts/Printer.c: drop zcode mangling/demangling support in C codeSergei Trofimovich2014-08-101-147/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: GHC's RTS contains ancient Zdecode code which changed format a bit. It's easier to drop broken part and show original names. The patch changes output for './hello +RTS -Da' (apply) from such gibberish: stg_ap_v_ret... PAP/1(0x92922a, &i!_-&i!_:<.s_r=Z) stg_ap_0_ret... base:GHC.MVar.MVar(0x7fd3d1f040f8) stg_ap_v_ret... THUNK(&i!_-&i!_i!f.Z) stg_ap_v_ret... PAP/1(0x92c1f3, EO_:<.s_r=Z, EP_:<.s_r=Z) stg_ap_0_ret... ghc-prim:GHC.Tuple.(,)(0x7fd3d1f04209, 0x7fd3d1f041fa) stg_ap_0_ret... ghc-prim:GHC.Types.:(0x7fd3d1f04301, 0x7fd3d1f042ea) stg_ap_0_ret... THUNK(3F0_i!f.Z, 0x9152a1) stg_ap_0_ret... FUN/3(&s=_GHCziIOziFD_z/fB_ff=r=/IOFD14_i!f.Z) stg_ap_ppv_ret... FUN/3(&s=_GHCziIOziFD_z/fB_ff=r=/IOFD14_i!f.Z) stg_ap_0_ret... FUN/2(&s=_GHCziIOziFD_z/fIOD=vi:=FD15_i!f.Z) stg_ap_pv_ret... FUN/2(&s=_GHCziIOziFD_z/fIOD=vi:=FD15_i!f.Z) stg_ap_0_ret... base:GHC.IO.Handle.Types.FileHandle(5'A_:<.s_r=Z, 0x7fd3d1f04ef0) stg_ap_v_ret... THUNK(*>_&+_2__+/_i!f.Z, 0x7fd3d1f0602a, 0x7fd3d1f04f10) stg_ap_v_ret... PAP/1(0x7fd3d1f0602a, 0x7fd3d1f04f10) to something more readable: stg_ap_v_ret... PAP/1(0x92922a, <Main_main_closure>[0x90b710]) stg_ap_0_ret... base:GHC.MVar.MVar(0x7f1e256040f8) stg_ap_v_ret... THUNK(<Main_main_info>[0x4046c8]) stg_ap_v_ret... PAP/1(0x92c1f3, <sEO_closure>[0x90b6f0], <sEP_closure>[0x90b6d0]) stg_ap_0_ret... ghc-prim:GHC.Tuple.(,)(0x7f1e25604209, 0x7f1e256041fa) stg_ap_0_ret... ghc-prim:GHC.Types.:(0x7f1e25604301, 0x7f1e256042ea) stg_ap_0_ret... THUNK(<s3F0_info>[0x434f70], 0x9152a1) stg_ap_0_ret... FUN/3(<base_GHCziIOziFD_zdfBufferedIOFD14_info>[0x5f5198]) stg_ap_ppv_ret... FUN/3(<base_GHCziIOziFD_zdfBufferedIOFD14_info>[0x5f5198]) stg_ap_0_ret... FUN/2(<base_GHCziIOziFD_zdfIODeviceFD15_info>[0x5f7c60]) stg_ap_pv_ret... FUN/2(<base_GHCziIOziFD_zdfIODeviceFD15_info>[0x5f7c60]) stg_ap_0_ret... base:GHC.IO.Handle.Types.FileHandle(<r5qA_closure>[0x91a920], 0x7f1e25604ef0) stg_ap_v_ret... THUNK(<stg_ap_2_upd_info>[0x6b1c60], 0x7f1e2560602a, 0x7f1e25604f10) stg_ap_v_ret... PAP/1(0x7f1e2560602a, 0x7f1e25604f10) First observed on '+RTS -Di' (interpreter) on unregisterised builds. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Test Plan: built 'hello world' with -debug in moth modes and ran under '+RTS -Da' Reviewers: simonmar, austin, ezyang Reviewed By: austin, ezyang Subscribers: phaskell, rwbarton, simonmar, relrod, ezyang, carter Differential Revision: https://phabricator.haskell.org/D116
* rts: add Emacs 'Local Variables' to every .c fileAustin Seipp2014-07-281-0/+8
| | | | | | | | This will hopefully help ensure some basic consistency in the forward by overriding buffer variables. In particular, it sets the wrap length, the offset to 4, and turns off tabs. Signed-off-by: Austin Seipp <austin@well-typed.com>
* Add SmallArray# and SmallMutableArray# typesJohan Tibell2014-03-291-0/+15
| | | | | | | | | | | | | | | These array types are smaller than Array# and MutableArray# and are faster when the array size is small, as they don't have the overhead of a card table. Having no card table reduces the closure size with 2 words in the typical small array case and leads to less work when updating or GC:ing the array. Reduces both the runtime and memory allocation by 8.8% on my insert benchmark for the HashMap type in the unordered-containers package, which makes use of lots of small arrays. With tuned GC settings (i.e. `+RTS -A6M`) the runtime reduction is 15%. Fixes #8923.
* In rts/Printer.c, print exact UPDATE_FRAME typeArash Rouhani2014-01-151-1/+19
| | | | | | | | When printing an update frame in printClosure(), it will not print the unspecific UPDATE_FRAME, instead it prints BH_UPDATE_FRAME, NORMAL_UPDATE_FRAME or MARKED_UPDATE_FRAME. Signed-off-by: Austin Seipp <austin@well-typed.com>
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