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* Update Wiki URLs to point to GitLabTakenobu Tani2019-03-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | This moves all URL references to Trac Wiki to their corresponding GitLab counterparts. This substitution is classified as follows: 1. Automated substitution using sed with Ben's mapping rule [1] Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy... New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy... 2. Manual substitution for URLs containing `#` index Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...#Zzz New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...#zzz 3. Manual substitution for strings starting with `Commentary` Old: Commentary/XxxYyy... New: commentary/xxx-yyy... See also !539 [1]: https://gitlab.haskell.org/bgamari/gitlab-migration/blob/master/wiki-mapping.json
* Detect overly long GC syncSimon Marlow2017-11-162-0/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: GC sync is the time between a GC being intiated and all the mutator threads finally stopping so that the GC can start. Problems that cause the GC sync to be delayed are hard to find and can cause dramatic slowdowns for heavily parallel programs. The new flag --long-gc-sync=<time> helps by emitting a warning and calling a user-overridable hook when the GC sync time exceeds the specified threshold. A debugger can be used to set a breakpoint when this happens and inspect the stacks of threads to find the culprit. Test Plan: ``` $ ./inplace/bin/ghc-stage2 +RTS --long-gc-sync=0.0000001 -S Alloc Copied Live GC GC TOT TOT Page Flts bytes bytes bytes user elap user elap 1135856 51144 153736 0.000 0.000 0.002 0.002 0 0 (Gen: 0) 1034760 94704 188752 0.000 0.000 0.002 0.002 0 0 (Gen: 0) 1038888 134832 228888 0.009 0.009 0.011 0.011 0 0 (Gen: 1) 1025288 90128 235184 0.000 0.000 0.012 0.012 0 0 (Gen: 0) 1049088 130080 333984 0.000 0.000 0.013 0.013 0 0 (Gen: 0) Warning: waited 0us for GC sync 1034424 73360 331976 0.000 0.000 0.013 0.013 0 0 (Gen: 0) ``` Also tested on a real production problem. Reviewers: niteria, bgamari, erikd Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D4193
* cpp: Use #pragma once instead of #ifndef guardsBen Gamari2017-04-231-4/+1
| | | | | | | | | | | | | | This both says what we mean and silences a bunch of spurious CPP linting warnings. This pragma is supported by all CPP implementations which we support. Reviewers: austin, erikd, simonmar, hvr Reviewed By: simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3482
* rts: Make out-of-memory errors more consistentBen Gamari2017-04-021-1/+1
| | | | This will make it a bit easier to maintain consistent output in the testsuite.
* Use C99's boolBen Gamari2016-11-292-2/+2
| | | | | | | | | | | | 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
* RtsFlags: Make `mallocFailHook` const correctErik de Castro Lopo2016-05-112-2/+2
| | | | | | | | | | | | Test Plan: Validate Reviewers: hvr, austin, bgamari, simonmar Reviewed By: bgamari, simonmar Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2193
* rts: add "-no-rtsopts-suggestions" optionJavran Cheng2015-05-062-21/+31
| | | | | | | | | | | | | | | | | | Depends on D767 Setting this flag prevents RTS from giving RTS suggestions like "Use `+RTS -Ksize -RTS' to increase it." According to the comment @rwbarton made in #9579, sometimes "+RTS" suggestions don't make sense (e.g. when the program is precompiled and installed through package managers), we can encourage people to distribute binaries with either "-no-rtsopts-suggestions" or "-rtsopts". Reviewed By: erikd, austin Differential Revision: https://phabricator.haskell.org/D809 GHC Trac Issues: #9579
* Better hints when RTS options not available (Trac #9579)Javran Cheng2015-04-172-6/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch provides user with a better hint when most RTS options are not available (not compiled with `-rtsopts`). A new field "rtsOptsEnabled" is added into RtsFlags.MiscFlags to tell the availablity of RTS options. Some concerns: * Unlike other flag fields in "libraries/base/GHC/RTS/Flags.hsc", "RtsOptsEnabled" is defined in "includes/RtsAPI.h" and lacks constant macros. Therefore In "GHC.RTS", "RtsOptsEnabled" simply derives Enum instance and reads as of type "CInt". * There are other ways to change RTS options (e.g. `-with-rtsopts`), but it might be too verbose to mention. Test Plan: validate Reviewers: austin, hvr, thomie, simonmar Reviewed By: thomie Subscribers: thomie, rwbarton Differential Revision: https://phabricator.haskell.org/D767 GHC Trac Issues: #9579
* Replace hooks by callbacks in RtsConfig (#8785)Simon Marlow2015-04-076-3/+36
| | | | | | | | | | | | Summary: Hooks rely on static linking semantics, and are broken by -Bsymbolic which we need when using dynamic linking. Test Plan: Built it Reviewers: austin, hvr, tibbe Differential Revision: https://phabricator.haskell.org/D8
* Revert "rts: add Emacs 'Local Variables' to every .c file"Simon Marlow2014-09-295-40/+0
| | | | This reverts commit 39b5c1cbd8950755de400933cecca7b8deb4ffcd.
* rts: add Emacs 'Local Variables' to every .c fileAustin Seipp2014-07-285-0/+40
| | | | | | | | 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>
* More OS X build fixesIan Lynagh2012-09-143-3/+3
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* Deprecate lnat, and use StgWord insteadSimon Marlow2012-09-073-3/+3
| | | | | | | | | | | | lnat was originally "long unsigned int" but we were using it when we wanted a 64-bit type on a 64-bit machine. This broke on Windows x64, where long == int == 32 bits. Using types of unspecified size is bad, but what we really wanted was a type with N bits on an N-bit machine. StgWord is exactly that. lnat was mentioned in some APIs that clients might be using (e.g. StackOverflowHook()), so we leave it defined but with a comment to say that it's deprecated.
* Fix warnings on Win64Ian Lynagh2012-04-263-3/+3
| | | | | | Mostly this meant getting pointer<->int conversions to use the right sizes. lnat is now size_t, rather than unsigned long, as that seems a better match for how it's used.
* Avoid integer overflow when calling allocGroup() (#5071)Simon Marlow2011-12-131-2/+6
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* Generate the C main() function when linking a binary (fixes #5373)Simon Marlow2011-11-161-14/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than have main() be statically compiled as part of the RTS, we now generate it into the tiny C file that we compile when linking a binary. The main motivation is that we want to pass the settings for the -rtsotps and -with-rtsopts flags into the RTS, rather than relying on fragile linking semantics to override the defaults, which don't work with DLLs on Windows (#5373). In order to do this, we need to extend the API for initialising the RTS, so now we have: void hs_init_ghc (int *argc, char **argv[], // program arguments RtsConfig rts_config); // RTS configuration hs_init_ghc() can optionally be used instead of hs_init(), and allows passing in configuration options for the RTS. RtsConfig is a struct, which currently has two fields: typedef struct { RtsOptsEnabledEnum rts_opts_enabled; const char *rts_opts; } RtsConfig; but might have more in the future. There is a default value for the struct, defaultRtsConfig, the idea being that you start with this and override individual fields as necessary. In fact, main() was in a separate static library, libHSrtsmain.a. That's now gone.
* Always define rtsOptsEnabled in the "extra object" when linkingIan Lynagh2011-10-111-13/+0
| | | | | | Now that we always link in an extra object, we may as well always define rtsOptsEnabled in it, rather than having a default value in rts/hooks/RtsOptsEnabled.c.
* Remove some antiquated C constructsIan Lynagh2011-08-011-1/+1
| | | | | | | | Fixes validate on amd64/Linux with: SRC_CC_OPTS += -Wmissing-parameter-type SRC_CC_OPTS += -Wold-style-declaration SRC_CC_OPTS += -Wold-style-definition
* Cleanup sweep and fix a bug in RTS flag processing.Simon Marlow2011-04-121-1/+1
| | | | | | | | | | | | | This code has accumulated a great deal of cruft over the years, this pass cleans up a lot of the surrounding cruft but leaves the actual argument processing alone - so there's still more that could be done. Bug fixed: - ghc_rts_opts should not be subject to the --rtsopts setting. If the programmer explicitly declares options with ghc_rts_opts, they shouldn't also have to accept command-line RTS options to make them work.
* Make -rtsopts more flexibleIan Lynagh2010-08-051-1/+1
| | | | | The default is a new "some" state, which allows only known-safe flags that we want on by default. Currently this is only "--info".
* Add a link-time flag to en/disable the RTS optionsIan Lynagh2010-03-131-0/+13
| | | | | | | | If RTS options are disabled then: * The ghc_rts_opts C code variable is processed as normal * The GHCRTS environment variable is ignored and, if it is defined, a warning is emitted * The +RTS flag gives an error and terminates the program
* Improve the "Stack space overflow" error; fixes trac #3296Ian Lynagh2009-08-191-1/+1
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* RTS tidyup sweep, first phaseSimon Marlow2009-08-026-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The first phase of this tidyup is focussed on the header files, and in particular making sure we are exposinng publicly exactly what we need to, and no more. - Rts.h now includes everything that the RTS exposes publicly, rather than a random subset of it. - Most of the public header files have moved into subdirectories, and many of them have been renamed. But clients should not need to include any of the other headers directly, just #include the main public headers: Rts.h, HsFFI.h, RtsAPI.h. - All the headers needed for via-C compilation have moved into the stg subdirectory, which is self-contained. Most of the headers for the rest of the RTS APIs have moved into the rts subdirectory. - I left MachDeps.h where it is, because it is so widely used in Haskell code. - I left a deprecated stub for RtsFlags.h in place. The flag structures are now exposed by Rts.h. - Various internal APIs are no longer exposed by public header files. - Various bits of dead code and declarations have been removed - More gcc warnings are turned on, and the RTS code is more warning-clean. - More source files #include "PosixSource.h", and hence only use standard POSIX (1003.1c-1995) interfaces. There is a lot more tidying up still to do, this is just the first pass. I also intend to standardise the names for external RTS APIs (e.g use the rts_ prefix consistently), and declare the internal APIs as hidden for shared libraries.
* Remove old GUM/GranSim codeSimon Marlow2009-06-022-42/+0
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* use "MB" rather than "Mb" for abbreviating megabytessimonmar@microsoft.com2007-12-181-1/+1
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* Reorganisation of the source treeSimon Marlow2006-04-078-0/+145
Most of the other users of the fptools build system have migrated to Cabal, and with the move to darcs we can now flatten the source tree without losing history, so here goes. The main change is that the ghc/ subdir is gone, and most of what it contained is now at the top level. The build system now makes no pretense at being multi-project, it is just the GHC build system. No doubt this will break many things, and there will be a period of instability while we fix the dependencies. A straightforward build should work, but I haven't yet fixed binary/source distributions. Changes to the Building Guide will follow, too.
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