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authorhttps://me.yahoo.com/a/g3Ccalpj0NhN566pHbUl6i9QF0QEkrhlfPM-#b1c14 <diana@web>2015-02-16 20:08:03 +0100
committerGNU Hurd web pages engine <web-hurd@gnu.org>2015-02-16 20:08:03 +0100
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-[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
-
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled [[GNU Free Documentation
-License|/fdl]]."]]"""]]
-
-[[!meta title="Enable Google Go programming (GCC: gccgo)"]]
-
-[[!tag open_issue_gcc]]
-
-Make the [Google Go programming language](http://golang.org/) available on
-GNU/Hurd in its [[GCC]] *gccgo* implementation, and enable Hurd-specific
-features.
-
-There is a [[!FF_project 263]][[!tag bounty]] on this task.
-
----
-
-
-# Part I
-
-First, make the language functional, have its test suite pass without errors.
-
-
-## Original [[community/GSoC]] Task Description
-
-[[!inline pages=community/gsoc/project_ideas/gccgo feeds=no]]
-
-
-## `tschwinge/t/hurd/go`
-
-There is now a `tschwinge/t/hurd/go` branch in GCC's Git repository, where the
-Hurd port for Go is being polished.
-
-
-## `getcontext`/`makecontext`/`setcontext`/`swapcontext` usage analysis
-
-In context of [[glibc/t/tls-threadvar]]. Looking at GCC trunk commit
-f6568ea476aa52a6e23c6db43b3e240cde55783a (2013-04-26).
-
-The check in `libgo/configure.ac` *whether setcontext clobbers TLS variables*
-is invalid on GNU Hurd.
-
-The `*context` functions are used in `libgo/runtime/go-signal.c` and
-`libgo/runtime/proc.c`.
-
-`__splitstack_getcontext`, `__splitstack_setcontext`,
-`__splitstack_makecontext`, `__splitstack_resetcontext`,
-`__splitstack_block_signals_context` are to be provided by libgcc. However, in
-said libgo runtime files, they're used only `#ifdef USING_SPLIT_STACK`.
-[[I|tschwinge]] would assume that before we can enable split stacks, first
-[[open_issues/glibc/t/tls-threadvar]] needs to be fixed.
-
-In `libgo/runtime/proc.c`:`runtime_gogo`, `setcontext` is used to *switch
-context to a different goroutine*. TODO.
-
-In `libgo/runtime/proc.c`:`runtime_mcall`, which *save[s] context and call[s]
-fn passing g as a parameter*, `getcontext` and `setcontext` are used; this is
-only called from `libgo/runtime/proc.c`:`runtime_gosched`. TODO.
-
-In `libgo/runtime/proc.c`:`runtime_tracebackothers`, `getcontext` is used to
-*switch context to the goroutine*. TODO.
-
-In `libgo/runtime/proc.c`:`runtime_mstart`, which is *called to start an M*,
-`getcontext` is used. TODO.
-
-In `libgo/runtime/proc.c`:`runtime_entersyscall`, which is called when *the
-goroutine g is about to enter a system call*, `getcontext` is used to *save the
-registers in the g structure so that any pointers held in registers will be
-seen by the garbage collector*. Should be fine.
-
-In `libgo/runtime/proc.c`:`__go_go`, `getcontext` and `makecontext` are used.
-TODO.
-
-In `libgo/runtime/thread.c`:`runtime_minit`, which is *[c]alled to initialize a
-new m (including the bootstrap m)*, `ss.ss_sp` is set to a new stack retrieved
-via `libgo/runtime/proc.c:runtime_malg`, which *allocate[s] a new g, with a
-stack [...]*, and then `sigaltstack` is called. TODO.
-
- libgo/runtime/go-signal.c: /* We are now running on the stack registered via sigaltstack.
- libgo/runtime/go-signal.c: and sigaltstack when the program starts.) */
-
- libgo/runtime/proc.c: vnewg->context.uc_stack.ss_sp = vsp;
- libgo/runtime/proc.c: vnewg->context.uc_stack.ss_sp += vspsize;
- libgo/runtime/proc.c: vnewg->context.uc_stack.ss_size = vspsize;
-
-Also, in `libgo/runtime/proc.c`:`runtime_newm`, `pthread_attr_setstacksize` is
-used, which we also can't support yet, for the same reason.
-
-
-========================
-
-**gccgo manages to get compiled and pass a fair amount of its tests, however its library is failing all but one of its tests.**
-
-Following are the results of the passing suite between the libgo tests run on linux (x86) and the Hurd:
-
-# the Hurd:
-
- Test Run By root on Fri Jul 12 17:56:44 UTC 2013
- Native configuration is i686-unknown-gnu0.3
-
- === libgo tests ===
-
- Schedule of variations:
- unix
-
- ...
-
- === libgo Summary ===
-
- # of expected passes 1
- # of unexpected failures 130
- /root/gcc_new/gccbuild/./gcc/gccgo version 4.9.0 20130606 (experimental) (GCC)
-
-# Linux results:
-
- Test Run By fotis on Τρι 02 Ιούλ 2013 09:20:20 μμ EEST
- Native configuration is i686-pc-linux-gnu
-
- === libgo tests ===
-
- Schedule of variations:
- unix
-
- ...
-
- === libgo Summary ===
-
- # of expected passes 131
- /home/fotis/Software/gcc_build/./gcc/gccgo version 4.9.0 20130702 (experimental) (GCC)
-
-
----
-
-
-# Part II
-
-Next, Hurd-specific features can be added. Add an interface to the
-language/environment for being able to do [[RPC]] calls, in order to program
-[[hurd/translator]]s natively in the Google Go programming language.
-
-
-## Original [[community/GSoC]] Task Description
-
-[[!inline pages=community/gsoc/project_ideas/language_bindings feeds=no]]