- ghc-tickets - Haskell.org

[GHC] #9419: Machine-readable output for profiling
by GHC 07 Aug '14

07 Aug '14

#9419: Machine-readable output for profiling -------------------------------------+------------------------------------- Reporter: ezyang | Owner: ezyang Type: feature request | Status: new Priority: normal | Milestone: Component: Profiling | Version: 7.9 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- We'll control whether or not machine-readable output is used using the `--machine-readable` flag currently used for GC stats. The format should also be self-explanatory for cost-center stats: per cost center we output the a CSV of `cc->time_ticks`, `cc->mem_alloc`. I'm a little less sure how to format the hierarchical cost center stacks; we could print out the entire trace of the stack, or maybe even organize the data recursively from the get go (outputting something JSON like, in that case.) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9419> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 2

[GHC] #9413: Outputable instance for Unique sometimes generates null bytes
by GHC 07 Aug '14

07 Aug '14

#9413: Outputable instance for Unique sometimes generates null bytes -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Other Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Steps to reproduce: {{{ [ezyang@hs01 ghc-validate]$ inplace/bin/ghc-stage2 --interactive -package ghc GHCi, version 7.9.20140805: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package array-0.5.0.0 ... linking ... done. Loading package deepseq-1.3.0.2 ... linking ... done. Loading package bytestring-0.10.4.0 ... linking ... done. Loading package containers-0.5.5.1 ... linking ... done. Loading package filepath-1.3.0.2 ... linking ... done. Loading package old-locale-1.0.0.6 ... linking ... done. Loading package time-1.4.2 ... linking ... done. Loading package unix-2.7.0.2 ... linking ... done. Loading package directory-1.2.1.0 ... linking ... done. Loading package pretty-1.1.1.1 ... linking ... done. Loading package process-1.2.0.0 ... linking ... done. Loading package Cabal-1.21.0.0 ... linking ... done. Loading package binary-0.7.1.0 ... linking ... done. Loading package bin-package-db-0.0.0.0 ... linking ... done. Loading package hoopl-3.10.0.1 ... linking ... done. Loading package hpc-0.6.0.1 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package transformers-0.4.1.0 ... linking ... done. Loading package ghc ... linking ... done. Prelude> :m +Unique Prelude Unique> :m +Outputable Prelude Unique Outputable> :m +FastString Prelude Unique Outputable FastString> :m +DynFlags Prelude Unique Outputable FastString DynFlags> showSDoc (defaultDynFlags undefined) $ ppr (getUnique (mkFastString "foo")) "\NUL3bS" }}} We should do something so this doesn't happen. Caused grief due to #9395 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9413> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 2

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by lukexi): Hi Karel, That's really helpful — well it's run on ARM64 /now/ : D If you (and Stephen, David and Manuel) are up for it I'd love to work on it. Maxwell Swadling, who helped Stephen and I finish up GHC iOS, is in too. I'll read through that doc, thanks! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:39> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by kgardas): One general note: the code in StgCRun written for ARM64 was probably written by me (I've provided the patch to Colin). So if this is this code, then please be assured that this code *never* has run on ARM64. It was written just from reading doc and as a first attempt to add support for registerised ARM64. At that time I've finished with this since I had not machine, ARM's foundation model was really slow and LLVM project was just before big merge from ARM's own AArch64 and Apple's own ARM64 LLVM backends together. Although the situation now looks way much better, at least both LLVM backends were merged together and even some hardware appears this all still means that if nobody has done it yet, then someone needs to do quite a lot. When I've been working on ARM port with Stephen, David helped me a lot and we wrote following LLVM/porting guide. I would recommend to read it: https://ghc.haskell.org/trac/ghc/wiki/Commentary/Compiler/Backends/LLVM/GHC… -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:38> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by lukexi): Ah, that's it! I was wondering if that was done yet. OK, we better get on that then : D Thanks so much for getting this started! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:37> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by kgardas): So basically you try to cross-compile using registerised GHC? If so, then I'm afraid nobody hacked LLVM to support GHC specific calling convention on ARM64 yet! If unregisterised, then you IMHO you should not be in this part of code which is IMHO just for registerised builds. Also if you attempt unregisterised, I would advice to use gcc and not llvm i.e. -fvia-C and not -fllvm for the start. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:36> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by lukexi): OK, so if I replace the offending call with {{{ "ldr lr, [sp]\n\t" "add sp, sp, %3\n\t" }}} (which I believe should be functionally equivalent) I can compile, but then get a crash running on the device here: {{{ HelloHaskell`StgRun: 0x1004cea34: stp x28, x27, [sp, #-96]! 0x1004cea38: stp x26, x25, [sp, #16] 0x1004cea3c: stp x24, x23, [sp, #32] 0x1004cea40: stp x22, x21, [sp, #48] 0x1004cea44: stp x20, x19, [sp, #64] 0x1004cea48: stp fp, lr, [sp, #80] 0x1004cea4c: stp x19, x20, [sp, #-16]! 0x1004cea50: stp x21, x22, [sp, #-16]! 0x1004cea54: stp x23, x24, [sp, #-16]! 0x1004cea58: stp x25, x26, [sp, #-16]! 0x1004cea5c: stp x27, x28, [sp, #-16]! 0x1004cea60: stp x16, x17, [sp, #-16]! 0x1004cea64: str lr, [sp, #-8]! 0x1004cea68: str lr, [sp, #16384] <------------EXC_BAD_ACCESS (code=259, address=0x16fdcf7a8) 0x1004cea6c: mov x19, x1 0x1004cea70: br x0 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:35> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by lukexi): Yep, I'm using Ben's branch to get LLVM HEAD working in general. I can get a build to complete just fine if I mangle the ASM in StgCRun.c but haven't made it actually work yet. I'm not sure that 3.4 has full ARM64 support (i.e. works on iOS)... -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:34> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by carter): llvm 3.4 should be kosher currently. Ben Gamari started some work on updated llvm bits, but thats not done yet -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:33> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7942: aarch64 support in ghc
by GHC 07 Aug '14

07 Aug '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: feature | Status: closed request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: fixed | Architecture: arm Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: doesn't work at all | Related Tickets: 7623, 8664 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by carter): LLVM HEAD IS BUSTED with CURRENT GHC HEAD and ALL GHC RELEASES fyi. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:32> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0