mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
The Go programming language
49,909 Commits 63 Branches 451 Tags 660 MiB
Go 94.3%
Assembly 5.3%
C 0.2%
Shell 0.1%
Go to file
Josh Bleecher Snyder 017ffcd10d cmd/link, runtime: convert FUNCDATA relocations to offsets 
Every function has associated numbered extra funcdata to another symbol.
Prior to this change, a funcdata pointer was stored as a relocation.

This change alters this to be an offset relative to go.func.* or go.funcrel.*.

This reduces the number of relocations on darwin/arm64 by about 40%.
It also shrinks externally linked binaries. On darwin/arm64:

size      before    after     Δ        %
addr2line 3788498   3699730   -88768   -2.343%
api       5100018   4951074   -148944  -2.920%
asm       4855234   4744274   -110960  -2.285%
buildid   2500162   2419986   -80176   -3.207%
cgo       4338258   4218306   -119952  -2.765%
compile   22764418  22132226  -632192  -2.777%
cover     4583186   4432770   -150416  -3.282%
dist      3200962   3094626   -106336  -3.322%
doc       3680402   3583602   -96800   -2.630%
fix       3114914   3023922   -90992   -2.921%
link      6308578   6154786   -153792  -2.438%
nm        3754338   3665826   -88512   -2.358%
objdump   4124738   4015234   -109504  -2.655%
pack      2232626   2155010   -77616   -3.476%
pprof     13497474  13044066  -453408  -3.359%
test2json 2483810   2402146   -81664   -3.288%
trace     10108898  9748802   -360096  -3.562%
vet       6884322   6681314   -203008  -2.949%
total     107320836 104167700 -3153136 -2.938%

relocs    before  after   Δ       %
addr2line 33357   25563   -7794   -23.365%
api       31589   18409   -13180  -41.723%
asm       27825   18904   -8921   -32.061%
buildid   15603   9513    -6090   -39.031%
cgo       27809   17103   -10706  -38.498%
compile   114769  64829   -49940  -43.513%
cover     32932   19462   -13470  -40.902%
dist      18797   10796   -8001   -42.565%
doc       22891   13503   -9388   -41.012%
fix       19700   11465   -8235   -41.802%
link      37324   23198   -14126  -37.847%
nm        33226   25480   -7746   -23.313%
objdump   35237   26610   -8627   -24.483%
pack      13535   7951    -5584   -41.256%
pprof     97986   63961   -34025  -34.724%
test2json 15113   8735    -6378   -42.202%
trace     66786   39636   -27150  -40.652%
vet       43328   25971   -17357  -40.060%
total     687806  431088  -256718 -37.324%

It should also incrementally speed up binary launching
and may reduce linker memory use.

This is another step towards removing relocations so
that pages that were previously dirtied by the loader may remain clean,
which will offer memory savings useful in constrained environments like iOS.

Removing the relocations in .stkobj symbols will allow some simplifications.
There will be no references into go.funcrel.*,
so we will no longer need to use the bottom bit to distinguish offset bases.

Change-Id: I83d34c1701d6f3f515b9905941477d522441019d
Reviewed-on: https://go-review.googlesource.com/c/go/+/352110
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
 		2021-10-05 15:47:57 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api cmd/api: set architecture sizes when type checking 2021-10-04 20:20:20 +00:00
doc cmd/go: add release note for 'go get' changes 2021-09-28 17:19:19 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc cmd/cgo: add go:notinheap annotation to Windows handle types 2021-09-22 18:10:24 +00:00
src cmd/link, runtime: convert FUNCDATA relocations to offsets 2021-10-05 15:47:57 +00:00
test test/typeparam: require -G=3 for issue48424.go (fix build) 2021-10-02 13:52:59 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
CONTRIBUTING.md
…
CONTRIBUTORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
LICENSE
…
PATENTS
…
README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.