March 2015 - ghc-tickets

[GHC] #9989: GHCI is slow for precompiled code
by GHC 05 Sep '15

05 Sep '15

#9989: GHCI is slow for precompiled code -------------------------------------+------------------------------------- Reporter: remdezx | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHC API | Version: 7.8.3 Keywords: | Operating System: Linux Architecture: | Type of failure: Runtime Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- Hello! We found that loading compiled and optimised `accelerate` code into ghci works much much slower than code run directly. (I'm marking it as a ghc-api bug, because I noticed this behavior while using it) Here is the example: {{{#!hs module Main where import Data.Array.Accelerate as A import Data.Array.Accelerate.CUDA as C import Data.Time.Clock (diffUTCTime, getCurrentTime) main :: IO () main = do start <- getCurrentTime print $ C.run $ A.maximum $ A.map (+1) $ A.use (fromList (Z:.1000000) [1..1000000] :: Vector Double) end <- getCurrentTime print $ diffUTCTime end start }}} When I compile it and run $ ghc -O2 Main.hs -threaded [1 of 1] Compiling Main ( Main.hs, Main.o ) Linking Main ... $ ./Main Array (Z) [1000001.0] 0.162204s It takes `0.16 s` to finish When I compile it and load into ghci: $ ghc -O2 -dynamic -c Main.hs $ ghci GHCi, version 7.8.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> :l Main Ok, modules loaded: Main. Prelude Main> main Loading package transformers-0.3.0.0 ... 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 binary-0.7.1.0 ... linking ... done. Loading package pretty-1.1.1.1 ... 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-2.7.0.1 ... linking ... done. Loading package directory-1.2.1.0 ... linking ... done. Loading package process-1.2.0.0 ... linking ... done. Loading package stm-2.4.4 ... linking ... done. Loading package SafeSemaphore-0.10.1 ... linking ... done. Loading package mtl-2.1.3.1 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package fclabels-2.0.2.2 ... linking ... done. Loading package text-1.1.1.3 ... linking ... done. Loading package hashable-1.2.3.1 ... linking ... done. Loading package primitive-0.5.4.0 ... linking ... done. Loading package vector-0.10.12.2 ... linking ... done. Loading package hashtables-1.2.0.1 ... linking ... done. Loading package unordered-containers-0.2.5.1 ... linking ... done. Loading package accelerate-0.15.0.0 ... linking ... done. Loading package byteable-0.1.1 ... linking ... done. Loading package cryptohash-0.11.6 ... linking ... done. Loading package cuda-0.6.5.1 ... linking ... done. Loading package exception-transformers-0.3.0.4 ... linking ... done. Loading package exception-mtl-0.3.0.5 ... linking ... done. Loading package old-time-1.1.0.2 ... linking ... done. Loading package polyparse-1.11 ... linking ... done. Loading package cpphs-1.18.6 ... linking ... done. Loading package haskell-src-exts-1.16.0.1 ... linking ... done. Loading package syb-0.4.4 ... linking ... done. Loading package th-lift-0.7 ... linking ... done. Loading package safe-0.3.8 ... linking ... done. Loading package th-expand-syns-0.3.0.4 ... linking ... done. Loading package th-reify-many-0.1.2 ... linking ... done. Loading package th-orphans-0.8.3 ... linking ... done. Loading package haskell-src-meta-0.6.0.8 ... linking ... done. Loading package srcloc-0.4.1 ... linking ... done. Loading package mainland-pretty-0.2.7 ... linking ... done. Loading package symbol-0.2.4 ... linking ... done. Loading package language-c-quote-0.8.0 ... linking ... done. Loading package accelerate-cuda-0.15.0.0 ... linking ... done. Array (Z) [1000001.0] 0.256128s It takes `0.26 s` to finish. On other computer, using `criterion`, we observed even a `50x` difference. Why is it working so slow, isn't ghci just to load function and simply call it? Here is how execution time changes for different matrix sizes. For comparison we have also measured time of interpreted code (without precompiling). {{{ size | compiled | precompiled | interpreted ---------+-----------+--------------+------------ 100 | 0.054076s | 0.082686s | 0.151857s 1000 | 0.054509s | 0.08305s | 0.135452s 10000 | 0.055405s | 0.08469s | 0.12632s 100000 | 0.057768s | 0.093011s | 0.155359s 1000000 | 0.089811s | 0.251359s | 0.202022s 10000000 | 0.397642s | 1.400603s | 0.898547s }}} We believe that problem lies on the side of `ghci` rather than `accelerate`, how could we confirm this? Moreover and even more important is there any workaround for it, if we need this precompiled code running fast in production environment? Any guidance will be appreciated. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9989> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 6

[GHC] #9481: Linker does not correctly resolve symbols in previously loaded objects
by GHC 05 Sep '15

05 Sep '15

#9481: Linker does not correctly resolve symbols in previously loaded objects -------------------------------------+------------------------------------- Reporter: edsko | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- '''Summary''': Given two object files (created from C files) A and B, where B refers to symbols defined in A, if we load B before A, calling `resolveObjs` after each object file, symbol resolution goes wrong. Full test case attached. '''Detailed description''': Consider {{{#!c // a.c #include <stdio.h> void defined_in_A() { printf("In A\n"); } }}} {{{#!c // b.c #include <stdio.h> void defined_in_A(); void defined_in_B() { printf("In B\n"); defined_in_A(); printf("In B\n"); } }}} and {{{#!hs {-# LANGUAGE ForeignFunctionInterface #-} module Main where import System.IO foreign import ccall "defined_in_B" defined_in_B :: IO () main :: IO () main = defined_in_B }}} and we use the GHC API to load the object files `a.o` and `b.o` (corresponding to `a.c` and `b.c`), calling `resolveObjs` after loading each object, and then load `Main` and call `Main.main`, everything works fine (the attached test case contains both `a.c`, `b.c` and `Main.hs` as well as the test program that calls into the GHC API). However, if we load `b.o` ''before'' `a.o`, things go wrong. When we load `b.o` and call `resolveObjs` then `resolveObjs` (quite reasonably) complains that {{{ lookupSymbol failed in relocateSection (relocate external) b.o: unknown symbol `_defined_in_A' }}} since we haven't loaded `a.o` yet. But when we then load `a.o` and call `resolveObjs` again, `resolveObjs` reports okay, but something goes wrong because the program subsequently segfaults. '''A successful run''' I took a closer look at what happens exactly. First, let's consider the test run where we load A before B, and everything works fine, and let's look at the precise code that we actually execute when `Main.main` does the foreign call to `defined_in_B`: {{{ # lldb Linkerbug Current executable set to 'Linkerbug' (x86_64). (lldb) breakpoint set -n ffi_call Breakpoint 1: where = Linkerbug`ffi_call + 29 at ffi64.c:421, address = 0x0000000102be2eed (lldb) run Process 92361 launched: 'Linkerbug' (x86_64) Loading object "a.o" symbol resolution ok Loading object "b.o" symbol resolution ok Loading Haskell module "Main.hs" ok Running "Main.main" Process 92361 stopped * thread #1: tid = 0x32048b, 0x0000000102be2eed Linkerbug`ffi_call(cif=0x000000010cc68500, fn=0x0000000104c6c210, rvalue=0x00007fff5fbff920, avalue=0x00007fff5fbff8c0) + 29 at ffi64.c:421, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 frame #0: 0x0000000102be2eed Linkerbug`ffi_call(cif=0x000000010cc68500, fn=0x0000000104c6c210, rvalue=0x00007fff5fbff920, avalue=0x00007fff5fbff8c0) + 29 at ffi64.c:421 (lldb) disassemble -c 14 -s fn 0x104c6c210: pushq %rbp 0x104c6c211: movq %rsp, %rbp 0x104c6c214: pushq %rbx 0x104c6c215: pushq %rax 0x104c6c216: leaq 0x1d(%rip), %rbx 0x104c6c21d: movq %rbx, %rdi 0x104c6c220: callq 0x104c6c3c8 0x104c6c225: xorl %eax, %eax 0x104c6c227: callq 0x104c6b210 0x104c6c22c: movq %rbx, %rdi 0x104c6c22f: addq $0x8, %rsp 0x104c6c233: popq %rbx 0x104c6c234: popq %rbp 0x104c6c235: jmpq 0x104c6c3c8 }}} This disassembly is the compiled code for B which, in order, does a call to `printf`, then to `defined_in_A`, and then back to `printf` (the last call is `jmpq` rather than `callq`: the C compiler did a tail call optimization). Let's make sure that this is actually true; the first call is a call to {{{ (lldb) disassemble -c 2 -s 0x104c6c3c8 0x104c6c3c8: jmpq *-0xe(%rip) 0x104c6c3ce: addb %al, (%rax) }}} which is an indirect jump to {{{ (lldb) memory read -f A -c 1 "0x104c6c3ce - 0xe" 0x104c6c3c0: 0x00007fff84fd5b9b libsystem_c.dylib`puts }}} to `puts`, okay, good. Seems an unnecessary level of indirection, but that's okay. The next call is to {{{ (lldb) disassemble -c 5 -s 0x104c6b210 0x104c6b210: pushq %rbp 0x104c6b211: movq %rsp, %rbp 0x104c6b214: leaq 0x6(%rip), %rdi 0x104c6b21b: popq %rbp 0x104c6b21c: jmpq 0x104c6b370 }}} which is the compiled code for `defined_in_A`, which should be just a call to `printf`. Let's confirm: {{{ (lldb) disassemble -c 2 -s 0x104c6b370 0x104c6b370: jmpq *-0xe(%rip) 0x104c6b376: addb %al, (%rax) (lldb) memory read -f A -c 1 "0x104c6b376 - 0xe" 0x104c6b368: 0x00007fff84fd5b9b libsystem_c.dylib`puts }}} Ok, all good. '''A failed run''' Now let's check what happens when we load the objects in the opposite order. The code that we execute is {{{ (lldb) disassemble -c 14 -s fn 0x104c6b210: pushq %rbp 0x104c6b211: movq %rsp, %rbp 0x104c6b214: pushq %rbx 0x104c6b215: pushq %rax 0x104c6b216: leaq 0x1d(%rip), %rbx 0x104c6b21d: movq %rbx, %rdi 0x104c6b220: callq 0x104c6b3c8 0x104c6b225: xorl %eax, %eax 0x104c6b227: callq 0x104c6c210 0x104c6b22c: movq %rbx, %rdi 0x104c6b22f: addq $0x8, %rsp 0x104c6b233: popq %rbx 0x104c6b234: popq %rbp 0x104c6b235: jmpq 0x104c6b556 }}} This immediately looks suspicious: the address of the `jmpq` (the second -- tail -- call to `printf`) is different from the first. The first `callq` is okay: {{{ (lldb) disassemble -c 2 -s 0x104c6b3c8 0x104c6b3c8: jmpq *-0xe(%rip) 0x104c6b3ce: addb %al, (%rax) (lldb) memory read -f A -c 1 "0x104c6b3ce - 0xe" 0x104c6b3c0: 0x00007fff84fd5b9b libsystem_c.dylib`puts }}} and the call to `defined_in_A`, as well as the code ''for'' `defined_in_A`, are both ok: {{{ (lldb) disassemble -c 5 -s 0x104c6c210 0x104c6c210: pushq %rbp 0x104c6c211: movq %rsp, %rbp 0x104c6c214: leaq 0x6(%rip), %rdi 0x104c6c21b: popq %rbp 0x104c6c21c: jmpq 0x104c6c370 (lldb) disassemble -c 2 -s 0x104c6c370 0x104c6c370: jmpq *-0xe(%rip) 0x104c6c376: addb %al, (%rax) (lldb) memory read -f A -c 1 "0x104c6c376 - 0xe" 0x104c6c368: 0x00007fff84fd5b9b libsystem_c.dylib`puts }}} However, that second call to `printf` (the `jmpq`) in `defined_in_B` is indeed wrong: it's jumping into nowhere: {{{ (lldb) memory read -c 8 0x104c6b556 0x104c6b556: 00 00 00 00 00 00 00 00 ........ }}} Note that somewhat surprisingly is it ''not'' the resolution of the symbol from `a.o` that is wrong; that ''does'' get resolved okay once we load `a.o`; rather, it is the jump to `puts` which is wrong (and then only the one of them). -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9481> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 5

[GHC] #9280: GHCi crash:
by GHC 05 Sep '15

05 Sep '15

#9280: GHCi crash: ------------------------------------------+-------------------------------- Reporter: mietek | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 7.8.2 Keywords: crash, dynamic linking | Operating System: Architecture: x86_64 (amd64) | Unknown/Multiple Difficulty: Unknown | Type of failure: GHCi crash Blocked By: | Test Case: Related Tickets: | Blocking: ------------------------------------------+-------------------------------- Given a statically-linked Haskell object file, interactive GHCi 7.8.2 crashes. {{{ $ cat >Foo.hs <<EOF module Foo where foo :: IO () foo = print "Foo" EOF }}} On OS X: {{{ $ ghc -Wall -c -o Foo.o Foo.hs }}} {{{ $ ghci -v Foo.o GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help Glasgow Haskell Compiler, Version 7.8.2, stage 2 booted by GHC version 7.6.3 Using binary package database: /opt/ghc-7.8.2/lib/ghc-7.8.2/package.conf.d/package.cache wired-in package ghc-prim mapped to ghc- prim-0.3.1.0-948744e1f99cc8bcc7c7d3ba60c7c2d8 wired-in package integer-gmp mapped to integer- gmp-0.5.1.0-dc47f6b546fc171f67a7f7d311684a99 wired-in package base mapped to base-4.7.0.0-a333addb6892f3cc2e6baa5ec782bd04 wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.9.0.0-ed6ecfb467e6936688bb20f968f702e1 wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. *** gcc: /usr/bin/gcc -m64 -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/opt/ghc-7.8.2/lib/ghc-7.8.2/base-4.7.0.0 --print-file-name libiconv.dylib Loading package base ... linking ... done. Loading object (static) Foo.o ... Created temporary directory: /var/folders/26/0tzj1txn0vb_0061l4z4rsmr0000gn/T/ghc41409_0 *** Linker: /usr/bin/gcc -m64 -fno-stack-protector -DTABLES_NEXT_TO_CODE -m64 -dynamiclib -o /var/folders/26/0tzj1txn0vb_0061l4z4rsmr0000gn/T/ghc41409_0/ghc41409_1.dylib Foo.o -undefined dynamic_lookup -single_module -install_name '@rpath/ghc41409_1.dylib' -L/opt/ghc-7.8.2/lib/ghc-7.8.2/base-4.7.0.0 -Wl,-rpath -Wl,/opt/ghc-7.8.2/lib/ghc-7.8.2/base-4.7.0.0 -L/opt/ghc-7.8.2/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -Wl,-rpath -Wl,/opt/ghc-7.8.2/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -L/opt/ghc-7.8.2/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -Wl,-rpath -Wl,/opt/ghc-7.8.2/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -L/opt/ghc-7.8.2/lib/ghc-7.8.2/rts-1.0 -Wl,-rpath -Wl,/opt/ghc-7.8.2/lib/ghc-7.8.2/rts-1.0 -lHSbase-4.7.0.0-ghc7.8.2 -lHSinteger-gmp-0.5.1.0-ghc7.8.2 -lHSghc-prim-0.3.1.0-ghc7.8.2 -liconv ld: illegal text-relocation to '_ghczmprim_GHCziCString_unpackCStringzh_closure' in /opt/ghc-7.8.2/lib/ghc-7.8.2/ghc-prim-0.3.1.0/libHSghc- prim-0.3.1.0-ghc7.8.2.dylib from '_sVK_info' in Foo.o for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) *** Deleting temp files: Deleting: /var/folders/26/0tzj1txn0vb_0061l4z4rsmr0000gn/T/ghc41409_0/ghc41409_1.dylib Warning: deleting non-existent /var/folders/26/0tzj1txn0vb_0061l4z4rsmr0000gn/T/ghc41409_0/ghc41409_1.dylib *** Deleting temp dirs: Deleting: /var/folders/26/0tzj1txn0vb_0061l4z4rsmr0000gn/T/ghc41409_0 }}} On Linux, without `-fPIC`: {{{ $ ghc -Wall -c -o Foo.o Foo.hs }}} {{{ ghci -v Foo.o GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help Glasgow Haskell Compiler, Version 7.8.2, stage 2 booted by GHC version 7.6.3 Using binary package database: /app/.halcyon/ghc/lib/ghc-7.8.2/package.conf.d/package.cache wired-in package ghc-prim mapped to ghc- prim-0.3.1.0-948744e1f99cc8bcc7c7d3ba60c7c2d8 wired-in package integer-gmp mapped to integer- gmp-0.5.1.0-dc47f6b546fc171f67a7f7d311684a99 wired-in package base mapped to base-4.7.0.0-018311399e3b6350d5be3a16b144df9b wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.9.0.0-dcc8c210fb02937e104bc1784d7b0f06 wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: Loading package ghc-prim ... linking ... done. *** gcc: /usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 --print-file-name libgmp.so Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading object (static) Foo.o ... Created temporary directory: /tmp/ghc7203_0 *** Linker: /usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -o /tmp/ghc7203_0/ghc7203_1.so Foo.o -shared -Wl,-Bsymbolic -Wl,-h,ghc7203_1.so -L/app/.halcyon/ghc/lib/ghc-7.8.2/base-4.7.0.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/base-4.7.0.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/rts-1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/rts-1.0 -lHSbase-4.7.0.0-ghc7.8.2 -lHSinteger-gmp-0.5.1.0-ghc7.8.2 -lHSghc-prim-0.3.1.0-ghc7.8.2 -lgmp '-Wl ,--hash-size=31' -Wl,--reduce-memory-overheads /usr/bin/ld: Foo.o: relocation R_X86_64_32S against `stg_bh_upd_frame_info' can not be used when making a shared object; recompile with -fPIC Foo.o: could not read symbols: Bad value collect2: ld returned 1 exit status *** Deleting temp files: Deleting: /tmp/ghc7203_0/ghc7203_1.so Warning: deleting non-existent /tmp/ghc7203_0/ghc7203_1.so *** Deleting temp dirs: Deleting: /tmp/ghc7203_0 }}} On Linux, with `-fPIC`: {{{ $ ghc -Wall -c -fPIC -o Foo.o Foo.hs }}} {{{ $ ghci -v Foo.o GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help Glasgow Haskell Compiler, Version 7.8.2, stage 2 booted by GHC version 7.6.3 Using binary package database: /app/.halcyon/ghc/lib/ghc-7.8.2/package.conf.d/package.cache wired-in package ghc-prim mapped to ghc- prim-0.3.1.0-948744e1f99cc8bcc7c7d3ba60c7c2d8 wired-in package integer-gmp mapped to integer- gmp-0.5.1.0-dc47f6b546fc171f67a7f7d311684a99 wired-in package base mapped to base-4.7.0.0-018311399e3b6350d5be3a16b144df9b wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.9.0.0-dcc8c210fb02937e104bc1784d7b0f06 wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: Loading package ghc-prim ... linking ... done. *** gcc: /usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 --print-file-name libgmp.so Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading object (static) Foo.o ... Created temporary directory: /tmp/ghc7223_0 *** Linker: /usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -o /tmp/ghc7223_0/ghc7223_1.so Foo.o -shared -Wl,-Bsymbolic -Wl,-h,ghc7223_1.so -L/app/.halcyon/ghc/lib/ghc-7.8.2/base-4.7.0.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/base-4.7.0.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/ghc-prim-0.3.1.0 -L/app/.halcyon/ghc/lib/ghc-7.8.2/rts-1.0 -Wl,-rpath -Wl,/app/.halcyon/ghc/lib/ghc-7.8.2/rts-1.0 -lHSbase-4.7.0.0-ghc7.8.2 -lHSinteger-gmp-0.5.1.0-ghc7.8.2 -lHSghc-prim-0.3.1.0-ghc7.8.2 -lgmp '-Wl ,--hash-size=31' -Wl,--reduce-memory-overheads /usr/bin/ld: Foo.o: relocation R_X86_64_PC32 against undefined symbol `ghczmprim_GHCziCString_unpackCStringzh_closure' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: final link failed: Bad value collect2: ld returned 1 exit status *** Deleting temp files: Deleting: /tmp/ghc7223_0/ghc7223_1.so Warning: deleting non-existent /tmp/ghc7223_0/ghc7223_1.so *** Deleting temp dirs: Deleting: /tmp/ghc7223_0 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9280> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 5

[GHC] #8229: Linking in Windows is slow
by GHC 05 Sep '15

05 Sep '15

#8229: Linking in Windows is slow -------------------------+------------------------------------------------- Reporter: | Owner: ezyang | Status: new Type: bug | Milestone: 7.8.1 Priority: | Version: 7.7 normal | Operating System: Windows Component: | Type of failure: Compile-time performance bug Compiler | Test Case: Keywords: | Blocking: Architecture: | Unknown/Multiple | Difficulty: | Unknown | Blocked By: | Related Tickets: | -------------------------+------------------------------------------------- It takes a long time to link ghc-stage2 on Windows; several minutes on what should be a pretty beefy machine. Here is the linker command: {{{ "C:\Users\ezyang\Dev\ghc-validate\inplace\lib/../mingw/bin/gcc.exe" "-U__i686" "-fno-stack-prot ector" "-DTABLES_NEXT_TO_CODE" "-o" "compiler/stage2/build/libHSghc-7.7.20130904-ghc7.7.2013090 4.dll" "-shared" "-Wl,--out- implib=compiler/stage2/build/libHSghc-7.7.20130904-ghc7.7.20130904. dll.a" "-Wl,--enable-auto-import" "compiler\stage2\build\GhcMonad.dyn_o" "compiler\stage2\build \Llvm.dyn_o" "compiler\stage2\build\Llvm\AbsSyn.dyn_o" "compiler\stage2\build\Llvm\MetaData.dyn _o" "compiler\stage2\build\Llvm\PpLlvm.dyn_o" "compiler\stage2\build\Llvm\Types.dyn_o" "compile r\stage2\build\LlvmCodeGen.dyn_o" "compiler\stage2\build\LlvmCodeGen\Base.dyn_o" "compiler\stag e2\build\LlvmCodeGen\CodeGen.dyn_o" "compiler\stage2\build\LlvmCodeGen\Data.dyn_o" "compiler\st age2\build\LlvmCodeGen\Ppr.dyn_o" "compiler\stage2\build\LlvmCodeGen\Regs.dyn_o" "compiler\stag e2\build\LlvmMangler.dyn_o" "compiler\stage2\build\CmmBuildInfoTables.dyn_o" "compiler\stage2\b uild\CmmPipeline.dyn_o" "compiler\stage2\build\CmmCommonBlockElim.dyn_o" "compiler\stage2\build \CmmContFlowOpt.dyn_o" "compiler\stage2\build\CmmLex.dyn_o" "compiler\stage2\build\CmmLint.dyn_ o" "compiler\stage2\build\CmmLive.dyn_o" "compiler\stage2\build\CmmOpt.dyn_o" "compiler\stage2\ build\CmmParse.dyn_o" "compiler\stage2\build\CmmProcPoint.dyn_o" "compiler\stage2\build\CmmRewr iteAssignments.dyn_o" "compiler\stage2\build\CmmSink.dyn_o" "compiler\stage2\build\CmmLayoutSta ck.dyn_o" "compiler\stage2\build\PprBase.dyn_o" "compiler\stage2\build\PprC.dyn_o" "compiler\st age2\build\CgUtils.dyn_o" "compiler\stage2\build\StgCmm.dyn_o" "compiler\stage2\build\StgCmmBin d.dyn_o" "compiler\stage2\build\StgCmmCon.dyn_o" "compiler\stage2\build\StgCmmExpr.dyn_o" "comp iler\stage2\build\StgCmmForeign.dyn_o" "compiler\stage2\build\StgCmmHeap.dyn_o" "compiler\stage 2\build\StgCmmHpc.dyn_o" "compiler\stage2\build\StgCmmPrim.dyn_o" "compiler\stage2\build\StgCmm ExtCode.dyn_o" "compiler\stage2\build\CoreLint.dyn_o" "compiler\stage2\build\CorePrep.dyn_o" "c ompiler\stage2\build\ExternalCore.dyn_o" "compiler\stage2\build\MkExternalCore.dyn_o" "compiler \stage2\build\PprExternalCore.dyn_o" "compiler\stage2\build\Check.dyn_o" "compiler\stage2\build \Coverage.dyn_o" "compiler\stage2\build\Desugar.dyn_o" "compiler\stage2\build\DsArrows.dyn_o" " compiler\stage2\build\DsBinds.dyn_o" "compiler\stage2\build\DsCCall.dyn_o" "compiler\stage2\bui ld\DsExpr.dyn_o" "compiler\stage2\build\DsForeign.dyn_o" "compiler\stage2\build\DsGRHSs.dyn_o" "compiler\stage2\build\DsListComp.dyn_o" "compiler\stage2\build\DsMonad.dyn_o" "compiler\stage2 \build\DsUtils.dyn_o" "compiler\stage2\build\Match.dyn_o" "compiler\stage2\build\MatchCon.dyn_o " "compiler\stage2\build\MatchLit.dyn_o" "compiler\stage2\build\BinIface.dyn_o" "compiler\stage 2\build\BuildTyCl.dyn_o" "compiler\stage2\build\IfaceEnv.dyn_o" "compiler\stage2\build\LoadIfac e.dyn_o" "compiler\stage2\build\MkIface.dyn_o" "compiler\stage2\build\TcIface.dyn_o" "compiler\ stage2\build\FlagChecker.dyn_o" "compiler\stage2\build\CodeOutput.dyn_o" "compiler\stage2\build \DriverMkDepend.dyn_o" "compiler\stage2\build\DriverPipeline.dyn_o" "compiler\stage2\build\Find er.dyn_o" "compiler\stage2\build\GHC.dyn_o" "compiler\stage2\build\GhcMake.dyn_o" "compiler\sta ge2\build\GhcPlugins.dyn_o" "compiler\stage2\build\DynamicLoading.dyn_o" "compiler\stage2\build \HeaderInfo.dyn_o" "compiler\stage2\build\HscMain.dyn_o" "compiler\stage2\build\HscStats.dyn_o" "compiler\stage2\build\InteractiveEval.dyn_o" "compiler\stage2\build\PprTyThing.dyn_o" "compil er\stage2\build\SysTools.dyn_o" "compiler\stage2\build\TidyPgm.dyn_o" "compiler\stage2\build\Ct ype.dyn_o" "compiler\stage2\build\HaddockUtils.dyn_o" "compiler\stage2\build\LexCore.dyn_o" "co mpiler\stage2\build\Lexer.dyn_o" "compiler\stage2\build\Parser.dyn_o" "compiler\stage2\build\Pa rserCore.dyn_o" "compiler\stage2\build\ParserCoreUtils.dyn_o" "compiler\stage2\build\RdrHsSyn.d yn_o" "compiler\stage2\build\PrelInfo.dyn_o" "compiler\stage2\build\ProfInit.dyn_o" "compiler\s tage2\build\SCCfinal.dyn_o" "compiler\stage2\build\RnBinds.dyn_o" "compiler\stage2\build\RnEnv. dyn_o" "compiler\stage2\build\RnExpr.dyn_o" "compiler\stage2\build\RnHsDoc.dyn_o" "compiler\sta ge2\build\RnNames.dyn_o" "compiler\stage2\build\RnPat.dyn_o" "compiler\stage2\build\RnSource.dy n_o" "compiler\stage2\build\RnTypes.dyn_o" "compiler\stage2\build\CoreMonad.dyn_o" "compiler\st age2\build\CSE.dyn_o" "compiler\stage2\build\FloatIn.dyn_o" "compiler\stage2\build\FloatOut.dyn _o" "compiler\stage2\build\LiberateCase.dyn_o" "compiler\stage2\build\SAT.dyn_o" "compiler\stag e2\build\SetLevels.dyn_o" "compiler\stage2\build\SimplCore.dyn_o" "compiler\stage2\build\SimplE nv.dyn_o" "compiler\stage2\build\SimplMonad.dyn_o" "compiler\stage2\build\SimplUtils.dyn_o" "co mpiler\stage2\build\Simplify.dyn_o" "compiler\stage2\build\SimplStg.dyn_o" "compiler\stage2\bui ld\StgStats.dyn_o" "compiler\stage2\build\UnariseStg.dyn_o" "compiler\stage2\build\SpecConstr.d yn_o" "compiler\stage2\build\Specialise.dyn_o" "compiler\stage2\build\CoreToStg.dyn_o" "compile r\stage2\build\StgLint.dyn_o" "compiler\stage2\build\DmdAnal.dyn_o" "compiler\stage2\build\Work Wrap.dyn_o" "compiler\stage2\build\WwLib.dyn_o" "compiler\stage2\build\FamInst.dyn_o" "compiler \stage2\build\Inst.dyn_o" "compiler\stage2\build\TcAnnotations.dyn_o" "compiler\stage2\build\Tc Arrows.dyn_o" "compiler\stage2\build\TcBinds.dyn_o" "compiler\stage2\build\TcClassDcl.dyn_o" "c ompiler\stage2\build\TcDefaults.dyn_o" "compiler\stage2\build\TcDeriv.dyn_o" "compiler\stage2\b uild\TcEnv.dyn_o" "compiler\stage2\build\TcExpr.dyn_o" "compiler\stage2\build\TcForeign.dyn_o" "compiler\stage2\build\TcGenDeriv.dyn_o" "compiler\stage2\build\TcGenGenerics.dyn_o" "compiler\ stage2\build\TcHsSyn.dyn_o" "compiler\stage2\build\TcHsType.dyn_o" "compiler\stage2\build\TcIns tDcls.dyn_o" "compiler\stage2\build\TcMType.dyn_o" "compiler\stage2\build\TcValidity.dyn_o" "co mpiler\stage2\build\TcMatches.dyn_o" "compiler\stage2\build\TcPat.dyn_o" "compiler\stage2\build \TcRnDriver.dyn_o" "compiler\stage2\build\TcRnMonad.dyn_o" "compiler\stage2\build\TcRnTypes.dyn _o" "compiler\stage2\build\TcRules.dyn_o" "compiler\stage2\build\TcSimplify.dyn_o" "compiler\st age2\build\TcErrors.dyn_o" "compiler\stage2\build\TcTyClsDecls.dyn_o" "compiler\stage2\build\Tc TyDecls.dyn_o" "compiler\stage2\build\TcUnify.dyn_o" "compiler\stage2\build\TcInteract.dyn_o" " compiler\stage2\build\TcCanonical.dyn_o" "compiler\stage2\build\TcSMonad.dyn_o" "compiler\stage 2\build\FunDeps.dyn_o" "compiler\stage2\build\GraphBase.dyn_o" "compiler\stage2\build\GraphColo r.dyn_o" "compiler\stage2\build\GraphOps.dyn_o" "compiler\stage2\build\GraphPpr.dyn_o" "compile r\stage2\build\IOEnv.dyn_o" "compiler\stage2\build\State.dyn_o" "compiler\stage2\build\Vectoris e\Builtins\Base.dyn_o" "compiler\stage2\build\Vectorise\Builtins\Initialise.dyn_o" "compiler\st age2\build\Vectorise\Builtins.dyn_o" "compiler\stage2\build\Vectorise\Monad\Base.dyn_o" "compil er\stage2\build\Vectorise\Monad\Naming.dyn_o" "compiler\stage2\build\Vectorise\Monad\Local.dyn_ o" "compiler\stage2\build\Vectorise\Monad\Global.dyn_o" "compiler\stage2\build\Vectorise\Monad\ InstEnv.dyn_o" "compiler\stage2\build\Vectorise\Monad.dyn_o" "compiler\stage2\build\Vectorise\U tils\Base.dyn_o" "compiler\stage2\build\Vectorise\Utils\Closure.dyn_o" "compiler\stage2\build\V ectorise\Utils\Hoisting.dyn_o" "compiler\stage2\build\Vectorise\Utils\PADict.dyn_o" "compiler\s tage2\build\Vectorise\Utils\Poly.dyn_o" "compiler\stage2\build\Vectorise\Utils.dyn_o" "compiler \stage2\build\Vectorise\Generic\Description.dyn_o" "compiler\stage2\build\Vectorise\Generic\PAM ethods.dyn_o" "compiler\stage2\build\Vectorise\Generic\PADict.dyn_o" "compiler\stage2\build\Vec torise\Generic\PData.dyn_o" "compiler\stage2\build\Vectorise\Type\Env.dyn_o" "compiler\stage2\b uild\Vectorise\Type\Type.dyn_o" "compiler\stage2\build\Vectorise\Type\TyConDecl.dyn_o" "compile r\stage2\build\Vectorise\Type\Classify.dyn_o" "compiler\stage2\build\Vectorise\Convert.dyn_o" " compiler\stage2\build\Vectorise\Vect.dyn_o" "compiler\stage2\build\Vectorise\Var.dyn_o" "compil er\stage2\build\Vectorise\Env.dyn_o" "compiler\stage2\build\Vectorise\Exp.dyn_o" "compiler\stag e2\build\Vectorise.dyn_o" "compiler\stage2\build\AsmCodeGen.dyn_o" "compiler\stage2\build\Targe tReg.dyn_o" "compiler\stage2\build\NCGMonad.dyn_o" "compiler\stage2\build\Instruction.dyn_o" "c ompiler\stage2\build\Size.dyn_o" "compiler\stage2\build\PIC.dyn_o" "compiler\stage2\build\CPrim .dyn_o" "compiler\stage2\build\X86\Regs.dyn_o" "compiler\stage2\build\X86\RegInfo.dyn_o" "compi ler\stage2\build\X86\Instr.dyn_o" "compiler\stage2\build\X86\Cond.dyn_o" "compiler\stage2\build \X86\Ppr.dyn_o" "compiler\stage2\build\X86\CodeGen.dyn_o" "compiler\stage2\build\PPC\Regs.dyn_o " "compiler\stage2\build\PPC\RegInfo.dyn_o" "compiler\stage2\build\PPC\Instr.dyn_o" "compiler\s tage2\build\PPC\Cond.dyn_o" "compiler\stage2\build\PPC\Ppr.dyn_o" "compiler\stage2\build\PPC\Co deGen.dyn_o" "compiler\stage2\build\SPARC\Base.dyn_o" "compiler\stage2\build\SPARC\Regs.dyn_o" "compiler\stage2\build\SPARC\Imm.dyn_o" "compiler\stage2\build\SPARC\AddrMode.dyn_o" "compiler\ stage2\build\SPARC\Cond.dyn_o" "compiler\stage2\build\SPARC\Instr.dyn_o" "compiler\stage2\build \SPARC\Stack.dyn_o" "compiler\stage2\build\SPARC\ShortcutJump.dyn_o" "compiler\stage2\build\SPA RC\Ppr.dyn_o" "compiler\stage2\build\SPARC\CodeGen.dyn_o" "compiler\stage2\build\SPARC\CodeGen\ Amode.dyn_o" "compiler\stage2\build\SPARC\CodeGen\Base.dyn_o" "compiler\stage2\build\SPARC\Code Gen\CondCode.dyn_o" "compiler\stage2\build\SPARC\CodeGen\Gen32.dyn_o" "compiler\stage2\build\SP ARC\CodeGen\Gen64.dyn_o" "compiler\stage2\build\SPARC\CodeGen\Sanity.dyn_o" "compiler\stage2\bu ild\SPARC\CodeGen\Expand.dyn_o" "compiler\stage2\build\RegAlloc\Liveness.dyn_o" "compiler\stage 2\build\RegAlloc\Graph\Main.dyn_o" "compiler\stage2\build\RegAlloc\Graph\Stats.dyn_o" "compiler \stage2\build\RegAlloc\Graph\ArchBase.dyn_o" "compiler\stage2\build\RegAlloc\Graph\ArchX86.dyn_ o" "compiler\stage2\build\RegAlloc\Graph\Coalesce.dyn_o" "compiler\stage2\build\RegAlloc\Graph\ Spill.dyn_o" "compiler\stage2\build\RegAlloc\Graph\SpillClean.dyn_o" "compiler\stage2\build\Reg Alloc\Graph\SpillCost.dyn_o" "compiler\stage2\build\RegAlloc\Graph\TrivColorable.dyn_o" "compil er\stage2\build\RegAlloc\Linear\Main.dyn_o" "compiler\stage2\build\RegAlloc\Linear\JoinToTarget s.dyn_o" "compiler\stage2\build\RegAlloc\Linear\State.dyn_o" "compiler\stage2\build\RegAlloc\Li near\Stats.dyn_o" "compiler\stage2\build\RegAlloc\Linear\FreeRegs.dyn_o" "compiler\stage2\build \RegAlloc\Linear\StackMap.dyn_o" "compiler\stage2\build\RegAlloc\Linear\Base.dyn_o" "compiler\s tage2\build\RegAlloc\Linear\X86\FreeRegs.dyn_o" "compiler\stage2\build\RegAlloc\Linear\X86_64\F reeRegs.dyn_o" "compiler\stage2\build\RegAlloc\Linear\PPC\FreeRegs.dyn_o" "compiler\stage2\buil d\RegAlloc\Linear\SPARC\FreeRegs.dyn_o" "compiler\stage2\build\DsMeta.dyn_o" "compiler\stage2\b uild\TcSplice.dyn_o" "compiler\stage2\build\Convert.dyn_o" "compiler\stage2\build\ByteCodeGen.d yn_o" "compiler\stage2\build\Debugger.dyn_o" "compiler\stage2\build\LibFFI.dyn_o" "compiler\sta ge2\build\Linker.dyn_o" "compiler\stage2\build\RtClosureInspect.dyn_o" "compiler\stage2\build\D ebuggerUtils.dyn_o" "compiler\stage2\build\parser\cutils.dyn_o" "compiler\stage2\build\ghci\kee pCAFsForGHCi.dyn_o" "compiler\stage2\build\cbits\genSym.dyn_o" "-lHSghc-7.7.20130904-0-ghc7.7.2 0130904.dll" "-Lcompiler/stage2/build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\transforme rs\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries \template-haskell\dist-inst all\build" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries\hpc\dist- install\build" "-Lc:\Users\ez yang\Dev\ghc-validate\libraries\hoopl\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc-validate\l ibraries\bin-package-db\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\binar y\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\Cabal\Cabal\dist-install\bu ild" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries\process\dist- install\build" "-Lc:\Users\ezya ng\Dev\ghc-validate\libraries\pretty\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc-validate\li braries\directory\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\time\dist-i nstall\build" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries\old-locale \dist-install\build" "-Lc :\Users\ezyang\Dev\ghc-validate\libraries\filepath\dist-install\build" "-Lc:\Users\ezyang\Dev\g hc-validate\libraries\Win32\dist-install\build" "-Lc:\Users\ezyang\Dev \ghc-validate\libraries\c ontainers\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\bytestring\dist-ins tall\build" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries\deepseq\dist- install\build" "-Lc:\Use rs\ezyang\Dev\ghc-validate\libraries\array\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc-valid ate\libraries\base\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc- validate\libraries\integer-gm p\dist-install\build" "-Lc:\Users\ezyang\Dev\ghc-validate\libraries\ghc- prim\dist-install\build " "-Lc:/Users/ezyang/Dev/ghc-validate/rts/dist/build" "-lHStransformers-0.3.0.0-ghc7.7.20130904 " "-lHStemplate-haskell-2.9.0.0-ghc7.7.20130904" "-lHShpc-0.6.0.1-ghc7.7.20130904" "-lHShoopl-3 .10.0.0-ghc7.7.20130904" "-lHSbin-package-db-0.0.0.0-ghc7.7.20130904" "-lHSbinary-0.7.1.0-ghc7. 7.20130904" "-lHSCabal-1.18.0-ghc7.7.20130904" "-lHSprocess-1.2.0.0-ghc7.7.20130904" "-lHSprett y-1.1.1.0-ghc7.7.20130904" "-lHSdirectory-1.2.0.1-ghc7.7.20130904" "-lHStime-1.4.1-ghc7.7.20130 904" "-lHSold-locale-1.0.0.5-ghc7.7.20130904" "-lHSfilepath-1.3.0.2-ghc7.7.20130904" "-lHSWin32 -2.3.0.0-ghc7.7.20130904" "-lHScontainers-0.5.2.1-ghc7.7.20130904" "-lHSbytestring-0.10.3.0-ghc 7.7.20130904" "-lHSdeepseq-1.3.0.2-ghc7.7.20130904" "-lHSarray-0.4.0.2-ghc7.7.20130904" "-lHSba se-4.7.0.0-ghc7.7.20130904" "-lHSinteger-gmp-0.5.1.0-ghc7.7.20130904" "-lHSghc-prim-0.3.1.0-ghc 7.7.20130904" "-lHSrts_thr-ghc7.7.20130904" "-lffi-6" "-lkernel32" "-luser32" "-lgdi32" "-lwinm m" "-ladvapi32" "-lshell32" "-lshfolder" "-lwsock32" "-luser32" "-lshell32" "-lm" "-lwsock32" " -lgdi32" "-lwinmm" "-lmingwex" "-Wl,-u,_ghczmprim_GHCziTypes_Izh_static_info" "-Wl,-u,_ghczmpri m_GHCziTypes_Czh_static_info" "-Wl,-u,_ghczmprim_GHCziTypes_Fzh_static_info" "-Wl,-u,_ghczmprim _GHCziTypes_Dzh_static_info" "-Wl,-u,_base_GHCziPtr_Ptr_static_info" "-Wl,-u,_ghczmprim_GHCziTy pes_Wzh_static_info" "-Wl,-u,_base_GHCziInt_I8zh_static_info" "-Wl,-u,_base_GHCziInt_I16zh_stat ic_info" "-Wl,-u,_base_GHCziInt_I32zh_static_info" "-Wl,-u,_base_GHCziInt_I64zh_static_info" "- Wl,-u,_base_GHCziWord_W8zh_static_info" "-Wl,-u,_base_GHCziWord_W16zh_static_info" "-Wl,-u,_bas e_GHCziWord_W32zh_static_info" "-Wl,-u,_base_GHCziWord_W64zh_static_info" "-Wl,-u,_base_GHCziSt able_StablePtr_static_info" "-Wl,-u,_ghczmprim_GHCziTypes_Izh_con_info" "-Wl,-u,_ghczmprim_GHCz iTypes_Czh_con_info" "-Wl,-u,_ghczmprim_GHCziTypes_Fzh_con_info" "-Wl,-u,_ghczmprim_GHCziTypes_ Dzh_con_info" "-Wl,-u,_base_GHCziPtr_Ptr_con_info" "-Wl,-u,_base_GHCziPtr_FunPtr_con_info" "-Wl ,-u,_base_GHCziStable_StablePtr_con_info" "-Wl,-u,_ghczmprim_GHCziTypes_False_closure" "-Wl,-u, _ghczmprim_GHCziTypes_True_closure" "-Wl,-u,_base_GHCziPack_unpackCString_closure" "-Wl,-u,_bas e_GHCziIOziException_stackOverflow_closure" "-Wl,-u,_base_GHCziIOziException_heapOverflow_closu re" "-Wl,-u,_base_ControlziExceptionziBase_nonTermination_closure" "-Wl,-u,_base_GHCziIOziExcep tion_blockedIndefinitelyOnMVar_closure" "-Wl,-u,_base_GHCziIOziException_blockedIndefinitelyOnS TM_closure" "-Wl,-u,_base_ControlziExceptionziBase_nestedAtomically_closure" "-Wl,-u,_base_GHCz iWeak_runFinalizzerBatch_closure" "-Wl,-u,_base_GHCziTopHandler_flushStdHandles_closure" "-Wl,- u,_base_GHCziTopHandler_runIO_closure" "-Wl,-u,_base_GHCziTopHandler_runNonIO_closure" "-Wl,-u, _base_GHCziConcziIO_ensureIOManagerIsRunning_closure" "-Wl,-u,_base_GHCziConcziIO_ioManagerCapa bilitiesChanged_closure" "-Wl,-u,_base_GHCziConcziSync_runSparks_closure" "-Wl,-u,_base_GHCziCo ncziSignal_runHandlers_closure" "-Wl,--hash-size=31" "-Wl,--reduce-memory- overheads" }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8229> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 5

[GHC] #8127: iOS patch no 19: Linking
by GHC 05 Sep '15

05 Sep '15

#8127: iOS patch no 19: Linking -------------------------------------+------------------------------------- Reporter: StephenBlackheath | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Keywords: | Operating System: Other Architecture: arm | Type of failure: GHC doesn't work Difficulty: Moderate (less | at all than a day) | Test Case: Blocked By: | Blocking: 7724 Related Tickets: | -------------------------------------+------------------------------------- Fix linking for cross compiler to iOS. This patch does these things: 1. use libtool to link to a static library in place of an executable (because on iOS the final link must be done in Xcode), 2. for packages, keep only the HS package libraries and throw out other options (because libtool doesn't accept them), 3. fail if you try to link a dynamic library on iOS because it isn't supported (not really needed but there for completeness). Note that there is a minor risk here, because in the normal case, the order of options passed to the linker is slightly different: The options relating to each dependent package are separated into three different kinds, but they're still in the same relative order per package. This should be perfectly OK. The name of "libtool" is hard-coded and can't be set by options. Is this OK? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8127> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 14

[GHC] #9943: Replace "error" with "errorWithStackTrace" from GHC.Stack in base libs
by GHC 04 Sep '15

04 Sep '15

#9943: Replace "error" with "errorWithStackTrace" from GHC.Stack in base libs -------------------------------------+------------------------------------- Reporter: | Owner: spacekitteh spacekitteh | Status: new Type: task | Milestone: 7.10.1 Priority: normal | Version: Component: Core | Operating System: Unknown/Multiple Libraries | Type of failure: None/Unknown Keywords: | Blocked By: Architecture: | Related Tickets: Unknown/Multiple | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- It is basically the same as the standard error function but outputs a stack trace if one is available. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9943> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 7

[GHC] #10047: inconsistency in name binding between splice and quasiquotation
by GHC 04 Sep '15

04 Sep '15

#10047: inconsistency in name binding between splice and quasiquotation -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Template | Version: 7.8.4 Haskell | Operating System: Unknown/Multiple Keywords: | Type of failure: None/Unknown Architecture: | Blocked By: Unknown/Multiple | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Let me preface this by saying that this may not be a bug. If not then it would be nice if the documentation for Template Haskell could clarify what's going on here. My understanding of quasiquotation is that a quasiquote `[n|foo|]` is equivalent to a splice `$(quoteExp n "foo")`. However, that is not the case in all contexts. {{{ module Q where import Language.Haskell.TH import Language.Haskell.TH.Quote n = QuasiQuoter { quoteExp = dyn } }}} {{{ rwbarton@morphism:/tmp$ ghci -XTemplateHaskell -XQuasiQuotes Q GHCi, version 7.8.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. [1 of 1] Compiling Q ( Q.hs, interpreted ) Q.hs:6:5: Warning: Fields of ‘QuasiQuoter’ not initialised: quotePat, quoteType, quoteDec In the expression: QuasiQuoter {quoteExp = dyn} In an equation for ‘n’: n = QuasiQuoter {quoteExp = dyn} Ok, modules loaded: Q. *Q> :t [| $(dyn "foo") |] [| $(dyn "foo") |] :: ExpQ *Q> :t [| [n|foo|] |] Loading package pretty-1.1.1.1 ... linking ... done. Loading package array-0.5.0.0 ... linking ... done. Loading package deepseq-1.3.0.2 ... linking ... done. Loading package containers-0.5.5.1 ... linking ... done. Loading package template-haskell ... linking ... done. <interactive>:1:7: Not in scope: ‘foo’ In the Template Haskell quotation [| [n|foo|] |] }}} Why do these behave differently? (Lastly, the link to the paper "Why It's Nice to be Quoted: Quasiquoting for Haskell" in the User's Guide at https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/template- haskell.html#th-quasiquotation is broken. Does this paper have a permanent home? In any case, I only skimmed it but it didn't seem to answer my question.) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10047> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 20

[GHC] #9447: Add support for resizing `MutableByteArray#`s
by GHC 27 Aug '15

27 Aug '15

#9447: Add support for resizing `MutableByteArray#`s -------------------------------------+------------------------------------- Reporter: hvr | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: Phab:D133 -------------------------------------+------------------------------------- This is motivated by #9281 which changes how memory is allocated, and gives rise to the need to be able to efficiently shrink or grow `MutableByteArray#`s before they're frozen into `ByteArray#` while retaining their original byte content to avoid a major bottle-neck. This ticket is for tracking/documenting all changes related to this new facility. Here's the current road-map: 1. Implement {{{#!hs shrinkMutableByteArray# :: MutableByteArray# s -> Int# -> State# s -> State# s resizeMutableByteArray# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, MutableByteArray# s #) }}} (see Phab:D133) 2. As suggested by Johan, {{{#!hs getSizeofMutableByteArray# :: MutableByteArray# s -> State# s -> (# State# s Int# #) }}} This is similar in spirit to `numCapabilities` and `getNumCapabilities`. Add a deprecate pragma (or equivalent) for `sizeofMutableByteArray#`. Add a note to `sizeofMutableByteArray#` stating that it's unsafe in the presence of calls to resize-operations on the same MBA. 3. Submit patches to upstream libraries replacing calls to `sizeofMutableByteArray#` with `getSizeofMutableByteArray#` 4. Investigate how to provide in-place (zero-copy) growing of MBAs (step 1. only implements in-place shrinking). -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9447> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 6

[GHC] #10032: --with-system-libffi not working on Solaris
by GHC 27 Aug '15

27 Aug '15

#10032: --with-system-libffi not working on Solaris -------------------------------------+------------------------------------- Reporter: kgardas | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build | Version: 7.11 System | Operating System: Solaris Keywords: | Type of failure: None/Unknown Architecture: | Blocked By: Unknown/Multiple | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Hello, an attempt to configure ghc-7.10.1-rc2 with: {{{ $ ./configure --with-gmp-includes=/usr/include/gmp/ --with-gmp- libraries=/usr/lib/ --with-system-libffi --with-ffi- includes=/usr/lib/libffi-3.0.9/include/ --with-ffi-libraries=/usr/lib/ }}} results in kind of broken distribution, since gmake test_bindist fails with: {{{ bindisttest/"install dir"/bin/runghc bindisttest/HelloWorld > bindisttest/output diff -U 1 bindisttest/output bindisttest/expected_output No differences encountered bindisttest/"install dir"/bin/ghc --make bindisttest/HelloWorld [1 of 1] Compiling Main ( bindisttest/HelloWorld.lhs, bindisttest/HelloWorld.o ) Linking bindisttest/HelloWorld ... bindisttest/HelloWorld > bindisttest/output diff -U 1 bindisttest/output bindisttest/expected_output No differences encountered bindisttest/"install dir"/bin/ghc-pkg check --no-user-package-db There are problems in package rts-1.0: library-dirs: @FFILibDir@ is a relative path which makes no sense (as there is nothing for it to be relative to). You can make paths relative to the package database itself by using ${pkgroot}. include-dirs: @FFIIncludeDir@ is a relative path which makes no sense (as there is nothing for it to be relative to). You can make paths relative to the package database itself by using ${pkgroot}. The following packages are broken, either because they have a problem listed above, or because they depend on a broken package. rts-1.0 ghc-7.10.0.20150123 haskeline-0.7.2.0 terminfo-0.4.0.1 xhtml-3000.2.1 transformers-0.4.2.0 hoopl-3.10.0.2 bin-package-db-0.0.0.0 Cabal-1.22.1.0 binary-0.7.3.0 template-haskell-2.10.0.0 pretty-1.1.2.0 hpc-0.6.0.2 process-1.2.2.0 directory-1.2.2.0 unix-2.7.1.0 time-1.5.0.1 containers-0.5.6.2 bytestring-0.10.6.0 deepseq-1.4.0.0 array-0.5.0.1 filepath-1.3.1.0 base-4.8.0.0 integer-gmp-1.0.0.0 ghc-prim-0.3.1.0 gmake[1]: *** [test_bindist] Error 1 gmake: *** [test_bindist] Error 2 }}} Honestly speaking I must add that even gmake binary-dist was not without issue since this expected ffi headers to be located in rts/dist/build directory but they were obviously not there. I've copied them manually and then binary-dist was able to run. I'm not sure if this is Solaris specific issue or if this also affects other Unix(-like) OSes. I mark that for 7.11 (HEAD) since I'm not sure I'll have a time to address this issue for 7.10.1-rc3/fcs. The workaround is easy, just let ghc use its own copy of ffi library and not the system provided one. In the long term however, having ghc using system provided one is better. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10032> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 3

[GHC] #8096: Add fudge-factor for performance tests run on non-validate builds
by GHC 27 Aug '15

27 Aug '15

#8096: Add fudge-factor for performance tests run on non-validate builds ------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.7 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Since I'm not going to get around to this immediately, Trac'ifying for posterity: These tests have been doing better than expected in the nightlies for some while. {{{ Unexpected failures: perf/compiler T3064 [stat too good] (normal) perf/compiler T3294 [stat too good] (normal) perf/compiler T5642 [stat too good] (normal) perf/haddock haddock.Cabal [stat too good] (normal) perf/haddock haddock.base [stat too good] (normal) }}} Unfortunately, fixing them is not a simple matter of shifting the ranges up, since the tests only exceed expectations on a /perf/ build, so on a normal build such as 'quick', these tests all pass normally. I could bump up the upper bounds so that the builder stops bleating about them; perhaps we could do something more complicated where the expected performance depends on what level of optimization GHC was built with (but I don't know how to implement this.) ---- The problem with just widening the bounds to cover 2 different types of build is that it increases the chance that performance changes won't actually be noticed by thge person responsible. Having different bounds for different build configurations is a pain, because (a) the testsuite has to work out which set of bounds to use, and (b) you now have even more wobbly values to keep up-to-date. I think perhaps the best thing would be to add some sort of (per-test?) fudge factor for non-validate builds. That way validate will still find performance regressions, like it does today, but other builds are less likely to give false positives. (Igloo) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8096> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 1