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* rts: Fix "variable set but not used" warningBen Gamari2017-08-011-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | gcc complains about this while building with Hadrian, ``` rts/RetainerProfile.c: In function ‘computeRetainerSet’: rts/RetainerProfile.c:1758:18: error: error: variable ‘rtl’ set but not used [-Werror=unused-but-set-variable] RetainerSet *rtl; ^~~ | 1758 | RetainerSet *rtl; | ^ ``` Reviewers: austin, erikd, simonmar, Phyx Reviewed By: Phyx Subscribers: Phyx, rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3801
* Add rtsopts ignore and ignoreAll.Andreas Klebinger2017-07-281-25/+37
| | | | | | | | | | | | | | | | | | | | | These ignore commandline arguments for ignore and commandline as well as GHCRTS arguments for ignoreAll. Passing RTS flags given on the command line along to the program by simply skipping processing of these flags by the RTS. This fixes #12870. Test Plan: ./validate Reviewers: austin, hvr, bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: Phyx, rwbarton, thomie GHC Trac Issues: #12870 Differential Revision: https://phabricator.haskell.org/D3740
* Initialize hs_init with UTF8 encoded arguments on Windows.Andreas Klebinger2017-07-275-51/+120
| | | | | | | | | | | | | | | | | | | | | | | Summary: Get utf8 encoded arguments before we call hs_init and use them instead of ignoring hs_init arguments. This reduces differing behaviour of the RTS between windows and linux and simplifies the code involved. A few testcases were changed to expect the same result on windows as on linux after the changes. This fixes #13940. Test Plan: ./validate Reviewers: austin, hvr, bgamari, erikd, simonmar, Phyx Subscribers: Phyx, rwbarton, thomie GHC Trac Issues: #13940 Differential Revision: https://phabricator.haskell.org/D3739
* Fix note references and some typosGabor Greif2017-07-263-3/+3
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* rts: Claim AP_STACK before adjusting SpBen Gamari2017-07-201-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | In the fix to #13615 we introduced some logic to atomically blackhole AP_STACKs closures upon entry. However, this logic was placed *after* a stack pointer adjustment. This meant that if someone else beat us to blackholing the AP_STACK we would suspend the thread with uninitialized content on the stack. This would then later blow up when threadPaused attempted to walk the stack, hence #13970. Silly bug but still cost lots of head-scratching to find. Thanks to albertov for the great repro. Fixes #13970. Bug originally introduced by the fix to #13615. Reviewers: austin, erikd, simonmar Reviewed By: erikd, simonmar Subscribers: rwbarton, thomie GHC Trac Issues: #13970, #13615 Differential Revision: https://phabricator.haskell.org/D3760
* Interpreter.c: use macros to access/modify SpMichal Terepeta2017-07-201-227/+240
| | | | | | | | | | | | | | | | | | | | | | | This is another step in fixing #13825 (based on D38 by Simon Marlow). This commit adds a few macros for accessing and modifying `Sp` (interpreter stack) and will be useful to allow sub-word indexing/pushing. (but that will be a separate change, this commit should introduce no changes in behavior) Signed-off-by: Michal Terepeta <michal.terepeta@gmail.com> Test Plan: ./validate Reviewers: bgamari, simonmar, austin, erikd Reviewed By: bgamari, erikd Subscribers: rwbarton, thomie GHC Trac Issues: #13825 Differential Revision: https://phabricator.haskell.org/D3744
* Fix a missing getNewNursery(), and related cleanupSimon Marlow2017-07-182-27/+14
| | | | | | | | | | | | | | | | | | | | Summary: When we use nursery chunks with +RTS -n<size>, when the current nursery runs out we have to check whether there's another chunk available with getNewNursery(). There was one place we weren't doing this: the ad-hoc heap check in scheduleProcessInbox(). The impact of the bug was that we would GC too early when using nursery chunks, especially in programs that used messages (throwTo between capabilities could do this, also hs_try_putmvar()). Test Plan: validate, also local testing in our application Reviewers: bgamari, niteria, austin, erikd Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3749
* Fix missing escape in macroMoritz Angermann2017-07-121-1/+1
| | | | | | | | | | Reviewers: angerman, austin, bgamari, erikd, simonmar Reviewed By: angerman Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3727
* Fix Work Balance computation in RTS statsDouglas Wilson2017-07-118-25/+141
| | | | | | | | | | | | | | | | | | | | | | | | | | | An additional stat is tracked per gc: par_balanced_copied This is the the number of bytes copied by each gc thread under the balanced lmit, which is simply (copied_bytes / num_gc_threads). The stat is added to all the appropriate GC structures, so is visible in the eventlog and in GHC.Stats. A note is added explaining how work balance is computed. Remove some end of line whitespace Test Plan: ./validate experiment with the program attached to the ticket examine code changes carefully Reviewers: simonmar, austin, hvr, bgamari, erikd Reviewed By: simonmar Subscribers: Phyx, rwbarton, thomie GHC Trac Issues: #13830 Differential Revision: https://phabricator.haskell.org/D3658
* Big-obj support for the Windows runtime linkerTamar Christina2017-07-082-152/+524
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: The normal object file on Windows has a limit of `2^16` sections that can be in an object-file. The `big-obj` format raises this to `2^32` sections. The implementation is made difficult because we now need to support two header formats and two section formats that differ only by a single element size within each. The element that's different is in the middle of the structs and since the structs are used to map regions of memory directly, it means we need to know which struct it is when we do the mapping or pointer arithmetics. This is the final Object-Code format which Windows compilers can generate which we do not support yet in GHCI. All other major compilers on the platforms can produce it and all linkers consume it (bfd and lld). See http://tinyurl.com/bigobj This patch abstracts away retrieving the fields to functions which all take an struct which describes which object format is currently being parsed. These functions are always in-lined as they're small but would looks messy being copy-pasted everywhere. Test Plan: ./validate and new test `big-obj` ``` Tamar@Rage MINGW64 /r $ gcc -c -Wa,-mbig-obj foo.c -o foo.o Tamar@Rage MINGW64 /r $ objdump -h foo.o foo.o: file format pe-bigobj-x86-64 Sections: Idx Name Size VMA LMA File off Algn 0 .text 00000010 0000000000000000 0000000000000000 00000128 2**4 CONTENTS, ALLOC, LOAD, READONLY, CODE 1 .data 00000000 0000000000000000 0000000000000000 00000000 2**4 ALLOC, LOAD, DATA 2 .bss 00000000 0000000000000000 0000000000000000 00000000 2**4 ALLOC 3 .xdata 00000008 0000000000000000 0000000000000000 00000138 2**2 CONTENTS, ALLOC, LOAD, READONLY, DATA 4 .pdata 0000000c 0000000000000000 0000000000000000 00000140 2**2 CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA 5 .rdata$zzz 00000030 0000000000000000 0000000000000000 0000014c 2**4 CONTENTS, ALLOC, LOAD, READONLY, DATA Tamar@Rage MINGW64 /r $ echo main | ~/ghc/inplace/bin/ghc-stage2.exe --interactive bar.hs foo.o GHCi, version 8.3.20170430: http://www.haskell.org/ghc/ :? for help [1 of 1] Compiling Main ( bar.hs, interpreted ) Ok, modules loaded: Main. *Main> 17 *Main> Leaving GHCi. ``` Reviewers: austin, bgamari, erikd, simonmar Subscribers: awson, rwbarton, thomie, #ghc_windows_task_force GHC Trac Issues: #13815 Differential Revision: https://phabricator.haskell.org/D3523
* Typos in comments [ci skip]Gabor Greif2017-07-062-2/+2
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* lowercase clangMoritz Angermann2017-07-061-2/+2
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* rts: Address AP_STACK comment suggestion from SimonBen Gamari2017-07-051-3/+3
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* rts/sm/Storage.c: tweak __clear_cache proto for clangSergei Trofimovich2017-07-051-2/+15
| | | | | | | | | | | | | | | | | | clang defines '__clear_cache' slightly differently from gcc: rts/sm/Storage.c:1349:13: error: error: conflicting types for '__clear_cache' | 1349 | extern void __clear_cache(char * begin, char * end); | ^ extern void __clear_cache(char * begin, char * end); ^ note: '__clear_cache' is a builtin with type 'void (void *, void *)' Reported by Moritz Angermann. While at it used '__builtin___clear_cache' if advertised by clang. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* Revert "rts/sm/Storage.c: tweak __clear_cache proto for clang"Sergei Trofimovich2017-07-051-13/+2
| | | | | | This reverts commit 9492703a5862ee8623455209e50344cf8c4de077. Incomplete patch (missing begin, end assignments).
* rts/sm/Storage.c: tweak __clear_cache proto for clangSergei Trofimovich2017-07-051-2/+13
| | | | | | | | | | | | | | | | | | clang defines '__clear_cache' slightly differently from gcc: rts/sm/Storage.c:1349:13: error: error: conflicting types for '__clear_cache' | 1349 | extern void __clear_cache(char * begin, char * end); | ^ extern void __clear_cache(char * begin, char * end); ^ note: '__clear_cache' is a builtin with type 'void (void *, void *)' Reported by Moritz Angermann. While at it used '__builtin___clear_cache' if advertised by clang. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* Eagerly blackhole AP_STACKsBen Gamari2017-07-033-0/+190
| | | | | | | | | | | | | This fixes #13615. See the rather lengthy Note [AP_STACKs must be eagerly blackholed] for details. Reviewers: simonmar, austin, erikd, dfeuer Subscribers: duog, dfeuer, hsyl20, rwbarton, thomie GHC Trac Issues: #13615 Differential Revision: https://phabricator.haskell.org/D3695
* rts: Fix isByteArrayPinned#'s treatment of large arraysBen Gamari2017-07-031-2/+3
| | | | | | | | | | | | | | | It should respond with True to both BF_PINNED and BF_LARGE byte arrays. However, previously it would only check the BF_PINNED flag. Test Plan: Validate Reviewers: simonmar, austin, erikd Subscribers: winterland1989, rwbarton, thomie GHC Trac Issues: #13894 Differential Revision: https://phabricator.haskell.org/D3685
* rts: Fix uninitialised variable usesBen Gamari2017-07-032-2/+2
| | | | | | | | | | | | | | Strangely gcc 5.4 compiling on amd64 (nixos) complained about these. Both warnings look correct, so I'm not sure why we haven't been seeing these up until now. Test Plan: Validate Reviewers: simonmar, austin, erikd Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3693
* Tag the FUN before making a PAP (#13767)Simon Marlow2017-07-031-2/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Pointers to FUNs are not guaranteed to be tagged in general, because the compiler doesn't always know the arity of a FUN when it needs to reference it, e.g. with -O0 when the function is in another module. However, there's one case where we can put the correct tag on a FUN: when it is referenced by a PAP, because when building the PAP we know the arity and we can tag the pointer correctly. The AutoApply code does this, and the sanity checker checks it, but the interpreter did not respect this invariant. This patch fixes it. Test Plan: ``` (cd ghc && make 2 GhcDebugged=YES) ./inplace/bin/ghc-stage2 --interpreter +RTS -DS ``` Reviewers: niteria, bgamari, austin, erikd Reviewed By: bgamari Subscribers: rwbarton, thomie GHC Trac Issues: #13767 Differential Revision: https://phabricator.haskell.org/D3680
* rts/RetainerProfile: Const-correctness fixesBen Gamari2017-06-291-9/+9
| | | | | | | | | | | | | | | These were found while using Hadrian, which apparently uses slightly stricter warning flags than the make-based build system. Test Plan: Validate Reviewers: austin, erikd, simonmar Reviewed By: erikd Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3679
* rts: Clarify whitehole logic in threadPausedBen Gamari2017-06-271-4/+3
| | | | | | | | | | | | | | | | | | | Previously we would look at the indirectee field of a WHITEHOLE object. However, WHITEHOLE isn't a sort of indirection and therefore has no indirectee field. I encountered this while investigating #13615, although it doesn't fix that bug. Test Plan: Validate Reviewers: simonmar, austin, erikd Subscribers: rwbarton, thomie GHC Trac Issues: #13615 Differential Revision: https://phabricator.haskell.org/D3674
* Allow bytecode interpreter to make unsafe foreign callsBen Gamari2017-06-271-5/+11
| | | | | | | | | | | | Reviewers: austin, hvr, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, thomie GHC Trac Issues: #8281, #13730. Differential Revision: https://phabricator.haskell.org/D3619
* rts: Always collect statsBen Gamari2017-06-262-59/+67
| | | | | | | | | | | | | | | | | | | | | | | It seems that 12ad4d417b89462ba8e19a3c7772a931b3a93f0e enabled collection by default as its needs stats.allocated_bytes to determine whether the program has exceeded its grace limit. However, enabling stats also enables some potentially expensive times checks. In general GC statistics should be cheap to compute (relative to the GC itself), so now we always compute them. This allows us to once again disable giveStats by default. Fixes #13864. Reviewers: simonmar, austin, erikd Reviewed By: simonmar Subscribers: rwbarton, thomie GHC Trac Issues: #13864 Differential Revision: https://phabricator.haskell.org/D3669
* UNREG: use __builtin___clear_cache where availableSergei Trofimovich2017-06-221-0/+16
| | | | | | | | | | | | | | | | | Noticed when was building UNREG ghc with -optc{-Wall,-Werror}: rts/sm/Storage.c:1359:3: error: error: implicit declaration of function '__clear_cache' [-Werror=implicit-function-declaration] __clear_cache((void*)begin, (void*)end); ^~~~~~~~~~~~~ | 1359 | __clear_cache((void*)begin, (void*)end); | ^ Left direct '__clear_cache' usage gcc toolchain before 4.4. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* Revert "rts: Suppress unused gcc_clear_cache warning"Ben Gamari2017-06-211-2/+0
| | | | This reverts commit d1d3e98443cf263ef09253e2478e3e638e174e0d.
* rts: Suppress unused gcc_clear_cache warningBen Gamari2017-06-211-0/+2
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* Revert "UNREG: use __builtin___clear_cache where available"Sergei Trofimovich2017-06-211-21/+1
| | | | | | | | | This reverts commit 6dd1257fdd4d18e84d32e89bf0ec664b3c8f7b93. Change fails vaildation: rts/sm/Storage.c:1351:20: error: error: ‘gcc_clear_cache’ defined but not used [-Werror=unused-function] STATIC_INLINE void gcc_clear_cache(void * begin, void * end)
* UNREG: use __builtin___clear_cache where availableSergei Trofimovich2017-06-211-1/+21
| | | | | | | | | | | | | | | Noticed when was building UNREG ghc with -optc{-Wall,-Werror}: rts/sm/Storage.c:1359:3: error: error: implicit declaration of function '__clear_cache' [-Werror=implicit-function-declaration] __clear_cache((void*)begin, (void*)end); ^~~~~~~~~~~~~ | 1359 | __clear_cache((void*)begin, (void*)end); | ^ Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* Fix GCC 7 warning in the RTSSylvain Henry2017-06-191-0/+4
| | | | | | | | | | | | Test Plan: validate Reviewers: austin, bgamari, erikd, simonmar Reviewed By: bgamari, simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3648
* rts: A bit of cleanup around the eventlogBen Gamari2017-06-191-67/+30
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* rts: Ensure that new capability count is > 0Ben Gamari2017-06-181-1/+7
| | | | | The Haskell wrapper already checks this but we should also check it in the RTS to catch non-Haskell callers. See #13832.
* Typos [ci skip]Gabor Greif2017-06-133-3/+3
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* linker: Fix cast-to-uint64_tBen Gamari2017-06-121-1/+1
| | | | This broke on 32-bit platforms.
* [linker] fix armv7 & add aarch64Moritz Angermann2017-06-0822-617/+1681
| | | | | | | | | | | | | | | This adds Global Offset Table logic, as well as PLT like logic for armv7 and aarch64; which replaces the preexisting symbolExtras logic, by placing the PLT tables next to the separtely loaded sections. This is needed to ensure that the symbol stubs are in range. Reviewers: bgamari, austin, erikd, simonmar Reviewed By: bgamari Subscribers: Ericson2314, ryantrinkle, rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3448
* Linker: Fix whitespaceBen Gamari2017-06-081-16/+16
| | | | [skip ci]
* Fix a lost-wakeup bug in BLACKHOLE handling (#13751)Simon Marlow2017-06-088-53/+132
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: The problem occurred when * Threads A & B evaluate the same thunk * Thread A context-switches, so the thunk gets blackholed * Thread C enters the blackhole, creates a BLOCKING_QUEUE attached to the blackhole and thread A's `tso->bq` queue * Thread B updates the blackhole with a value, overwriting the BLOCKING_QUEUE * We GC, replacing A's update frame with stg_enter_checkbh * Throw an exception in A, which ignores the stg_enter_checkbh frame Now we have C blocked on A's tso->bq queue, but we forgot to check the queue because the stg_enter_checkbh frame has been thrown away by the exception. The solution and alternative designs are discussed in Note [upd-black-hole]. This also exposed a bug in the interpreter, whereby we were sometimes context-switching without calling `threadPaused()`. I've fixed this and added some Notes. Test Plan: * `cd testsuite/tests/concurrent && make slow` * validate Reviewers: niteria, bgamari, austin, erikd Reviewed By: erikd Subscribers: rwbarton, thomie GHC Trac Issues: #13751 Differential Revision: https://phabricator.haskell.org/D3630
* Better import library support for WindowsTamar Christina2017-06-027-150/+346
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The import library support added for 7.10.3 was only a partial one. This support was predicated on using file extensions to determine whether or not a library was an import library. It also couldn't handle libraries with multiple dll pointers. This is a rewrite of that patch and fully integrating it into the normal archive parsing and loading routines. This solves a host of issues, among others allowing us to finally use `-lgcc_s`. This also fixes a problem with our previous implementation, where we just loaded the DLL and moved on. Doing this had the potential of using the wrong symbol at resolve time. Say a DLL already loaded (A.dll) has symbol a exported (dependency of another dll perhaps). We find an import library `B.lib` explicitly defining an export of `a`. we load `B.dll` but this gets put after `A.dll`, at resolve time we would use the value from `A` instead of `B` which is what we wanted. Test Plan: ./valide and make test TEST=13606 Reviewers: austin, bgamari, erikd, simonmar Reviewed By: bgamari Subscribers: rwbarton, RyanGlScott, thomie, #ghc_windows_task_force GHC Trac Issues: #13606, #12499, #12498 Differential Revision: https://phabricator.haskell.org/D3513
* rts: Make compact debugging output depend upon compact debug flagBen Gamari2017-05-231-1/+1
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* fix a memory leak in osNumaMaskKubo Kovac2017-05-221-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | got an error when using asan: ``` ==1866689==ERROR: LeakSanitizer: detected memory leaks Direct leak of 16 byte(s) in 1 object(s) allocated from: #0 0x10640568 in malloc ??:? #1 0x154d867e in numa_bitmask_alloc .../numactl-2.0.8/libnuma_nosymve r.c:204 #2 0x154d867e in numa_allocate_nodemask .../numactl-2.0.8/libnuma_nosymve r.c:724 #3 0x154d867e in numa_get_mems_allowed .../numactl-2.0.8/libnuma_nosymve r.c:1141 #4 0x10b54a45 in osNumaMask ...ghc-8.0.2/rts/posix/OSMem.c:59 8 ``` Test Plan: compile, validate Reviewers: simonmar, niteria, austin, bgamari, erikd Reviewed By: bgamari Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3537
* CNF: Silence pointer fix-up message unless gc debugging is enabledBen Gamari2017-05-201-2/+2
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* rts/linker/ElfTypes.h: restore powerps (and others) supportSergei Trofimovich2017-05-141-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GHC build fails for powerpc-unknown-linux-gnu and hppa-unknown-linux-gnu targets as: rts_dist_HC rts/dist/build/RtsStartup.o rts/linker/ElfTypes.h:23:4: error: error: #error "Unsupported arch!" Before the change code tried to whitelist architectures and classify them into ELF32/ELF64. It does not work for UNREG arches like 'hppa', 'sparc64', 'm68k', 'mips'. It is nuanced for things like mips64 and x86_64: 'mips64-unknown-linux-gnu-gcc -mabi=64' is ELFCLASS64 'mips64-unknown-linux-gnu-gcc' is ELFCLASS32 'x86_64-pc-linux-gnu-gcc' is ELFCLASS64 'x86_64-pc-linux-gnu-gcc -mx32' is ELFCLASS32 Here it's not enough to know HOST_ARCH. We really need to know ABI. The change uses '__LP64__' as a proxy for ELFCLASS64. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Reviewers: angerman, simonmar, austin, bgamari, erikd Reviewed By: angerman, bgamari, erikd Subscribers: rwbarton, thomie GHC Trac Issues: #13696 Differential Revision: https://phabricator.haskell.org/D3583
* rts: annotate switch/case with '/* fallthrough */'Sergei Trofimovich2017-05-145-0/+13
| | | | | | | | | | | | | | Fixes gcc-7.1.0 warnings of form: rts/sm/Scav.c:559:9: error: error: this statement may fall through [-Werror=implicit-fallthrough=] scavenge_fun_srt(info); ^~~~~~~~~~~~~~~~~~~~~~ Many of places are indeed unobvious and some are already annotated by comments. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* ProfilerReportJson.c: fix out-of-bounds accessSergei Trofimovich2017-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Found by gcc-7.1 which reported build error as: rts/ProfilerReportJson.c:23:16: error: error: comparison between pointer and zero character constant [-Werror=pointer-compare] for (; str != '\0' && len > 0; str++) { ^~ | 23 | for (; str != '\0' && len > 0; str++) { | ^ Unfixed code in context: ```c static void escapeString(char const* str, char *out, int len) { len--; // reserve character in output for terminating NUL for (; str != '\0' && len > 0; str++) { char c = *str; ``` The intent here is to process 'len' (if positive) or '\0'-terminator in 'str' but dereference was missing. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* rts: Don't build StgCRunAsm.S if unregisterisedBen Gamari2017-05-111-0/+3
| | | | | | | | | | | | | | | | | StgCRunAsm.S provides StgCRun on powerpc64le platforms when registerised. However, in the unregisterised setting we use the mini-interpreter and consequently shouldn't build StgCRunAsm.S lest we get duplicate symbols. Test Plan: Build unregisterised compiler on AIX. Reviewers: hvr, trommler, austin, simonmar Reviewed By: trommler, simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3560
* Fix iossimulatorMoritz Angermann2017-05-111-0/+5
| | | | | | | | | | | | | | | | | The introduction of the aarch64 linker for iOS forgot that the ios simulator was still using the x86_64/mach-o linker, which requires the use of symbol extras. Until this is overhauled (see #13678), we should revert to the symbol extras logic for x86_64-apple-ios Reviewers: austin, bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3556
* We define the `<XXX>_HOST_ARCH` to `1`, but never to `0`inMoritz Angermann2017-05-113-12/+13
| | | | | | | | | | | | | | | | | compiler/ghc.mk @echo "#define $(HostArch_CPP)_HOST_ARCH 1" >> $@ @echo "#define $(TargetArch_CPP)_HOST_ARCH 1" >> $@ this leads to warnigns like: > warning: 'x86_64_HOST_ARCH' is not defined, evaluates to 0 [-Wundef] Reviewers: austin, bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3555
* Typos [ci skip]Gabor Greif2017-05-101-1/+1
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* Optimize casMutVar# for single-threaded RTSDavid Feuer2017-05-081-0/+15
| | | | | | | | | | | | | | The single-threaded RTS shouldn't actually need to use CAS to implement `casMutVar#`; there are no other threads to coordinate with. Reviewers: austin, bgamari, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3544
* tweak to minimize diff against ocInit_ELFGabor Greif2017-05-051-2/+2
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