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Commit Graph

45176 Commits

Author SHA1 Message Date
Daniel Martí
de74ea5d74 cmd/go: set TOOLEXEC_IMPORTPATH for -toolexec tools
This way, a -toolexec tool can tell precisely what package is being
built when it's run. This was very hard to do before, because the tool
had to piece together that information given the build action's
arguments or flags.

Since there wasn't a good set of tests for -toolexec, add one in the
form of a test script. It builds a simple set of packages with a variety
of build tools, to ensure that all the cases behave as expected.

Like other recent master changes, include the changelog item for this
user-facing change too.

Fixes #15677.

Change-Id: I0a5a1d9485840323ec138b2e64b7e7dd803fdf90
Reviewed-on: https://go-review.googlesource.com/c/go/+/263357
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
2020-10-22 15:10:01 +00:00
Xiangdong Ji
61313dab52 cmd/go: use the last -linkmode flag to determine external linking
Current linkmode checking in determining package dependencies doesn't
take multiple -linkmode options into consideration, may lead to redundant
dependency on 'runtime/cgo'.

Fixes the problem and adds a testcase.

Change-Id: Iac5ea9fb3ca5ef931201afd0f3441f41f946c919
Reviewed-on: https://go-review.googlesource.com/c/go/+/263497
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-10-22 14:51:57 +00:00
Lynn Boger
b4c8b67adc cmd,cmd/vendor: pick up updates for golang.org/x/arch/ppc64
Bring in updates to golang.org/x/arch/ppc64 to add new
instructions from CLs 260617, 230957, 249158.

Used the directions found in README.vendor:

  cd $GOROOT/src/cmd
  go get -d golang.org/x/arch@latest
  go mod tidy
  go mod vendor

Change-Id: Ie8ceb9c804928b72b37fff5b63981c174fb86989
Reviewed-on: https://go-review.googlesource.com/c/go/+/264079
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-22 13:49:19 +00:00
Keyuan
ed2010e676 imports: make ScanDir ignore go files start with dot
Adding "." Prefix Check for go files.

Fixes #42047
Change-Id: Ifc42bf562f52fdd304f9828b06fc57888fcd8049
Reviewed-on: https://go-review.googlesource.com/c/go/+/264078
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
2020-10-22 13:39:31 +00:00
hitzhangjie
9c28a50fd1 cmd/go: when module enabled, go clean removes built binary
Now "go clean" can remove binary as expected, when module enabled and the module name isn't  "main" or the name of folder.

Fixes issue #41656

Change-Id: I54b9435ece045e03a12dc230efe84c8dd381a07c
GitHub-Last-Rev: f4ea2d8c76
GitHub-Pull-Request: golang/go#41999
Reviewed-on: https://go-review.googlesource.com/c/go/+/262677
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
2020-10-22 13:36:17 +00:00
Alberto Donizetti
3bac5faa4a cmd/compile: make gc debug flags collector a struct
gc debug flags are currently stored in a 256-long array, that is then
addressed using the ASCII numeric value of the flag itself (a quirk
inherited from the old C compiler). It is also a little wasteful,
since we only define 16 flags, and the other 240 array elements are
always empty.

This change makes Debug a struct, which also provides static checking
that we're not referencing flags that does not exist.

Change-Id: I2f0dfef2529325514b3398cf78635543cdf48fe0
Reviewed-on: https://go-review.googlesource.com/c/go/+/263539
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-10-22 09:33:46 +00:00
Russ Cox
4c7a18d74a go/build: recognize and report //go:embed lines
The code in this CL does the work of looking for the "embed" import
and then finding and recording the arguments to //go:embed lines
in Go source files. The go command will use this information to prepare
information about embedded files to pass to the compiler.

The tests of the Package fields end up being end-to-end via the
go command (added in the CL with the go command changes),
like all the other Package fields.

For #41191.

Change-Id: I0c87b71ca809c0031603cc403c030d3088299e6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/243941
Trust: Russ Cox <rsc@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-10-22 01:20:16 +00:00
Kevin Burke
a29dd1f2bd net: add Example for Unix dialer with context
Showing users how to accomplish this more easily is a compromise
between doing nothing and adding a new API to the net package.

Fixes #38506.

Change-Id: I43f831cf94951c987cf3c8c1aa55f0012ee8034e
Reviewed-on: https://go-review.googlesource.com/c/go/+/263417
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
2020-10-21 23:53:08 +00:00
Ian Lance Taylor
cb768c801a encoding/xml: fix reserved namespace check to be case-insensitive
Fixes the check for the reserved namespace prefix
"xml" to be case insensitive, so as to match all variants of:

    (('X'|'x')('M'|'m')('L'|'l'))

as mandated by Section 2.3 of https://www.w3.org/TR/REC-xml/

This is a roll forward of CL 203417, which was rolled back by CL 240179.
We've decided that the roll back was incorrect, and any broken tests
should be fixed.

The original CL 203417 was by Tamás Gulácsi.

Fixes #35151
For #39876

Change-Id: I2e6daa7aeb252531fba0b8a56086613e13059528
Reviewed-on: https://go-review.googlesource.com/c/go/+/264024
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-10-21 23:51:30 +00:00
Keith Randall
9a49f77257 runtime/race: update race .syso files
Fixes #39186

Change-Id: I624ab73b3083f190978c09716672ce1b712a5c81
Reviewed-on: https://go-review.googlesource.com/c/go/+/264082
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Keith Randall <khr@golang.org>
2020-10-21 23:40:29 +00:00
Emmanuel T Odeke
4e5a313524 net/http: test that ParseMultipartForm catches overflows
Tests that if the combination of:
* HTTP multipart file payload size
* ParseMultipartForm's maxMemory parameter
* the internal leeway buffer size of 10MiB

overflows, then we'll report an overflow instead of silently
passing.

Reapplies and fixes CL 254977, which was reverted in CL 263658.

The prior test lacked a res.Body.Close(), so fixed that and
added a leaked Transport check to verify correctness.

Updates 40430.

Change-Id: I3c0f7ef43d621f6eb00f07755f04f9f36c51f98f
Reviewed-on: https://go-review.googlesource.com/c/go/+/263817
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Damien Neil <dneil@google.com>
2020-10-21 23:05:41 +00:00
eric fang
b2a8317b31 cmd/compile: use desired info when allocating registers for live values
When allocting registers for live values, use desired register if available,
this is helpful for some cases, such as (*entry).delete, which can save a
few of copies.
Besides, this patch allows more debugging information to be printed out.

Test results of compilecmp on Linux/amd64:
name                      old time/op                 new time/op                 delta
Template                    326729362.060000ns +- 3%    329227238.775510ns +- 4%  +0.76%  (p=0.038 n=50+49)
Unicode                     157671860.391304ns +- 6%    156917927.320000ns +- 6%    ~     (p=0.291 n=46+50)
GoTypes                    1065591138.304348ns +- 2%   1063695977.434783ns +- 1%    ~     (p=0.208 n=46+46)
Compiler                   5053424790.760001ns +- 2%   5052729636.551020ns +- 3%    ~     (p=0.908 n=50+49)
SSA                       12392067635.866669ns +- 2%  12319786960.460005ns +- 2%  -0.58%  (p=0.008 n=45+50)
Flate                       212609767.340000ns +- 5%    213011228.085106ns +- 5%    ~     (p=0.685 n=50+47)
GoParser                    266870495.100000ns +- 4%    266962314.280000ns +- 3%    ~     (p=0.975 n=50+50)
Reflect                     660164306.551021ns +- 2%    658284470.729167ns +- 2%    ~     (p=0.069 n=49+48)
Tar                         292805895.720000ns +- 4%    292103626.954545ns +- 2%    ~     (p=0.321 n=50+44)
XML                         386294811.700000ns +- 4%    386665088.820000ns +- 4%    ~     (p=0.786 n=50+50)
LinkCompiler                548495788.659575ns +- 5%    549359489.102041ns +- 4%    ~     (p=0.855 n=47+49)
ExternalLinkCompiler       1810414270.280000ns +- 2%   1806872224.673470ns +- 2%    ~     (p=0.313 n=50+49)
LinkWithoutDebugCompiler    340888843.795918ns +- 5%    340341541.100000ns +- 6%    ~     (p=0.735 n=49+50)
[Geo mean]                   664550174.613777ns          664090221.153575ns       -0.07%

name                      old user-time/op            new user-time/op            delta
Template                    565202800.000000ns +-16%    595351040.000000ns +-16%  +5.33%  (p=0.001 n=50+50)
Unicode                     378444740.000000ns +-14%    373825183.673469ns +-17%    ~     (p=0.458 n=50+49)
GoTypes                    2052073341.463415ns +-12%   2059679864.864865ns +- 7%    ~     (p=0.381 n=41+37)
Compiler                   9913371980.000000ns +-20%   9848836720.000002ns +-19%    ~     (p=0.781 n=50+50)
SSA                       25013846224.489799ns +-17%  24571896183.673466ns +-17%    ~     (p=0.132 n=49+49)
Flate                       314422702.127660ns +-17%    314831666.666667ns +-11%    ~     (p=0.427 n=47+45)
GoParser                    419496060.000000ns +- 9%    417403460.000000ns +-11%    ~     (p=0.512 n=50+50)
Reflect                    1233632469.387755ns +-17%   1193061073.170732ns +-13%  -3.29%  (p=0.030 n=49+41)
Tar                         509855937.500000ns +-10%    508700740.000000ns +-14%    ~     (p=0.890 n=48+50)
XML                         703511425.531915ns +-12%    694007591.836735ns +-11%    ~     (p=0.164 n=47+49)
LinkCompiler                993137687.500000ns +- 6%    991914714.285714ns +- 8%    ~     (p=0.860 n=48+49)
ExternalLinkCompiler       2193851840.000001ns +- 3%   2186672183.673470ns +- 5%    ~     (p=0.320 n=50+49)
LinkWithoutDebugCompiler    420800875.000000ns +-10%    422062640.000000ns +- 9%    ~     (p=0.840 n=48+50)
[Geo mean]                  1145156131.480097ns         1142033233.550961ns       -0.27%

name                      old alloc/op                new alloc/op                delta
Template                                36.3MB +- 0%                36.3MB +- 0%    ~     (p=0.886 n=50+49)
Unicode                                 30.1MB +- 0%                30.1MB +- 0%    ~     (p=0.792 n=50+50)
GoTypes                                  118MB +- 0%                 118MB +- 0%    ~     (p=1.000 n=47+48)
Compiler                                 562MB +- 0%                 562MB +- 0%    ~     (p=0.205 n=50+49)
SSA                                     1.42GB +- 0%                1.42GB +- 0%  -0.12%  (p=0.000 n=50+50)
Flate                                   22.8MB +- 0%                22.8MB +- 0%    ~     (p=0.384 n=50+47)
GoParser                                28.0MB +- 0%                28.0MB +- 0%  -0.02%  (p=0.013 n=50+50)
Reflect                                 78.0MB +- 0%                78.0MB +- 0%    ~     (p=0.384 n=46+48)
Tar                                     34.1MB +- 0%                34.1MB +- 0%    ~     (p=0.072 n=50+50)
XML                                     43.1MB +- 0%                43.1MB +- 0%  -0.04%  (p=0.000 n=49+50)
LinkCompiler                            98.5MB +- 0%                98.5MB +- 0%  +0.01%  (p=0.012 n=50+43)
ExternalLinkCompiler                    89.6MB +- 0%                89.6MB +- 0%    ~     (p=0.762 n=50+50)
LinkWithoutDebugCompiler                56.9MB +- 0%                56.9MB +- 0%    ~     (p=0.268 n=49+48)
[Geo mean]                               77.7MB                      77.7MB       -0.01%

name                      old allocs/op               new allocs/op               delta
Template                                  367k +- 0%                  367k +- 0%  -0.01%  (p=0.002 n=50+49)
Unicode                                   345k +- 0%                  345k +- 0%    ~     (p=0.981 n=50+50)
GoTypes                                  1.28M +- 0%                 1.28M +- 0%  -0.00%  (p=0.002 n=49+50)
Compiler                                 5.39M +- 0%                 5.39M +- 0%  -0.00%  (p=0.000 n=50+50)
SSA                                      13.9M +- 0%                 13.9M +- 0%  +0.01%  (p=0.000 n=50+50)
Flate                                     230k +- 0%                  230k +- 0%    ~     (p=0.815 n=50+50)
GoParser                                  292k +- 0%                  292k +- 0%  -0.01%  (p=0.000 n=50+50)
Reflect                                   977k +- 0%                  977k +- 0%  -0.00%  (p=0.035 n=50+50)
Tar                                       343k +- 0%                  343k +- 0%  -0.01%  (p=0.008 n=48+50)
XML                                       418k +- 0%                  418k +- 0%  -0.01%  (p=0.000 n=50+50)
LinkCompiler                              516k +- 0%                  516k +- 0%  +0.01%  (p=0.002 n=50+48)
ExternalLinkCompiler                      570k +- 0%                  570k +- 0%    ~     (p=0.430 n=46+50)
LinkWithoutDebugCompiler                  169k +- 0%                  169k +- 0%    ~     (p=0.706 n=49+49)
[Geo mean]                                 672k                        672k       -0.00%

name                      old maxRSS/op               new maxRSS/op               delta
Template                                 34.3M +- 5%                 34.7M +- 4%  +1.24%  (p=0.004 n=50+50)
Unicode                                  36.2M +- 5%                 36.1M +- 8%    ~     (p=0.785 n=50+50)
GoTypes                                  75.7M +- 7%                 76.1M +- 6%    ~     (p=0.544 n=50+50)
Compiler                                  304M +- 7%                  304M +- 7%    ~     (p=0.744 n=50+50)
SSA                                       721M +- 6%                  723M +- 7%    ~     (p=0.724 n=49+50)
Flate                                    26.1M +- 3%                 26.1M +- 5%    ~     (p=0.649 n=48+49)
GoParser                                 29.3M +- 5%                 29.3M +- 4%    ~     (p=0.809 n=50+50)
Reflect                                  56.0M +- 6%                 56.3M +- 5%    ~     (p=0.350 n=50+50)
Tar                                      34.1M +- 3%                 33.9M +- 5%    ~     (p=0.121 n=49+50)
XML                                      39.6M +- 5%                 39.9M +- 4%    ~     (p=0.109 n=50+50)
LinkCompiler                              168M +- 1%                  168M +- 1%    ~     (p=0.578 n=49+48)
ExternalLinkCompiler                      179M +- 1%                  179M +- 2%    ~     (p=0.522 n=46+46)
LinkWithoutDebugCompiler                  137M +- 3%                  137M +- 3%    ~     (p=0.463 n=41+50)
[Geo mean]                                79.3M                       79.5M       +0.20%

name                      old text-bytes              new text-bytes              delta
HelloSize                                812kB +- 0%                 811kB +- 0%  -0.05%  (p=0.000 n=50+50)

name                      old data-bytes              new data-bytes              delta
HelloSize                               13.3kB +- 0%                13.3kB +- 0%    ~     (all equal)

name                      old bss-bytes               new bss-bytes               delta
HelloSize                                206kB +- 0%                 206kB +- 0%    ~     (all equal)

name                      old exe-bytes               new exe-bytes               delta
HelloSize                               1.21MB +- 0%                1.21MB +- 0%  +0.02%  (p=0.000 n=50+50)

file      before    after     Δ       %
addr2line 4052949   4052453   -496    -0.012%
api       4948171   4947163   -1008   -0.020%
asm       4888889   4888049   -840    -0.017%
buildid   2617545   2617673   +128    +0.005%
cgo       4521681   4516801   -4880   -0.108%
compile   19139091  19137683  -1408   -0.007%
cover     4843191   4840359   -2832   -0.058%
dist      3473677   3474717   +1040   +0.030%
doc       3821592   3821552   -40     -0.001%
fix       3220587   3220059   -528    -0.016%
link      6587368   6582696   -4672   -0.071%
nm        3999858   3999186   -672    -0.017%
objdump   4409161   4408217   -944    -0.021%
pack      2394038   2393846   -192    -0.008%
pprof     13601271  13602487  +1216   +0.009%
test2json 2645148   2644604   -544    -0.021%
trace     10357878  10356862  -1016   -0.010%
vet       6779482   6778706   -776    -0.011%
total     106301577 106283113 -18464  -0.017%

Change-Id: I63ac6e224e1a4756ddc1bfc4aabbaeb92d7d4273
Reviewed-on: https://go-review.googlesource.com/c/go/+/263599
Run-TryBot: eric fang <eric.fang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: eric fang <eric.fang@arm.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-21 19:08:53 +00:00
erifan01
1c0d1f4e97 cmd/compile: optimize regalloc for phi value
When allocating registers for phi value, only the primary predecessor is considered.
Taking into account the allocation status of other predecessors can help reduce
unnecessary copy or spill operations. Many such cases can be found in the standard
library, such as runtime.wirep, moveByType, etc. The test results from benchstat
also show that this change helps reduce the file size.

name                      old time/op       new time/op       delta
Template                        328ms ± 5%        326ms ± 4%    ~     (p=0.254 n=50+47)
Unicode                         156ms ± 7%        158ms ±10%    ~     (p=0.412 n=49+49)
GoTypes                         1.07s ± 3%        1.07s ± 2%    ~     (p=0.664 n=48+49)
Compiler                        4.43s ± 3%        4.44s ± 3%    ~     (p=0.758 n=48+50)
SSA                             10.3s ± 2%        10.4s ± 2%  +0.43%  (p=0.017 n=50+46)
Flate                           208ms ± 9%        209ms ± 7%    ~     (p=0.920 n=49+46)
GoParser                        260ms ± 5%        262ms ± 4%    ~     (p=0.063 n=50+48)
Reflect                         687ms ± 3%        685ms ± 2%    ~     (p=0.459 n=50+48)
Tar                             293ms ± 4%        293ms ± 5%    ~     (p=0.695 n=49+48)
XML                             391ms ± 4%        389ms ± 3%    ~     (p=0.109 n=49+46)
LinkCompiler                    570ms ± 5%        563ms ± 5%  -1.10%  (p=0.006 n=46+47)
ExternalLinkCompiler            1.57s ± 3%        1.56s ± 3%    ~     (p=0.118 n=47+46)
LinkWithoutDebugCompiler        349ms ± 6%        349ms ± 5%    ~     (p=0.726 n=49+47)
[Geo mean]                      645ms             645ms       -0.05%

name                      old user-time/op  new user-time/op  delta
Template                        507ms ±14%        513ms ±14%    ~     (p=0.398 n=48+49)
Unicode                         345ms ±29%        345ms ±38%    ~     (p=0.521 n=47+49)
GoTypes                         1.95s ±16%        1.94s ±19%    ~     (p=0.324 n=50+50)
Compiler                        8.26s ±16%        8.22s ±14%    ~     (p=0.834 n=50+50)
SSA                             19.6s ± 8%        19.2s ±15%    ~     (p=0.056 n=50+50)
Flate                           293ms ± 9%        299ms ±12%    ~     (p=0.057 n=47+50)
GoParser                        388ms ± 9%        387ms ±14%    ~     (p=0.660 n=46+50)
Reflect                         1.15s ±28%        1.12s ±18%    ~     (p=0.648 n=49+48)
Tar                             456ms ±10%        476ms ±15%  +4.48%  (p=0.001 n=46+48)
XML                             648ms ±27%        634ms ±16%    ~     (p=0.685 n=50+46)
LinkCompiler                    1.00s ± 8%        1.00s ± 8%    ~     (p=0.638 n=50+50)
ExternalLinkCompiler            1.96s ± 5%        1.96s ± 5%    ~     (p=0.792 n=50+50)
LinkWithoutDebugCompiler        443ms ±10%        442ms ±11%    ~     (p=0.813 n=50+50)
[Geo mean]                      1.05s             1.05s       -0.09%

name                      old alloc/op      new alloc/op      delta
Template                       36.0MB ± 0%       36.0MB ± 0%    ~     (p=0.599 n=49+50)
Unicode                        29.8MB ± 0%       29.8MB ± 0%    ~     (p=0.739 n=50+50)
GoTypes                         118MB ± 0%        118MB ± 0%    ~     (p=0.436 n=50+50)
Compiler                        562MB ± 0%        562MB ± 0%    ~     (p=0.693 n=50+50)
SSA                            1.42GB ± 0%       1.42GB ± 0%  -0.10%  (p=0.000 n=50+49)
Flate                          22.5MB ± 0%       22.5MB ± 0%    ~     (p=0.429 n=48+49)
GoParser                       27.7MB ± 0%       27.7MB ± 0%    ~     (p=0.705 n=49+48)
Reflect                        77.7MB ± 0%       77.7MB ± 0%  -0.01%  (p=0.043 n=50+50)
Tar                            33.8MB ± 0%       33.8MB ± 0%    ~     (p=0.241 n=49+50)
XML                            42.8MB ± 0%       42.8MB ± 0%    ~     (p=0.677 n=47+49)
LinkCompiler                   98.3MB ± 0%       98.3MB ± 0%    ~     (p=0.157 n=50+50)
ExternalLinkCompiler           89.4MB ± 0%       89.4MB ± 0%    ~     (p=0.683 n=50+50)
LinkWithoutDebugCompiler       56.7MB ± 0%       56.7MB ± 0%    ~     (p=0.155 n=49+49)
[Geo mean]                     77.3MB            77.3MB       -0.01%

name                      old allocs/op     new allocs/op     delta
Template                         367k ± 0%         367k ± 0%    ~     (p=0.863 n=50+50)
Unicode                          345k ± 0%         345k ± 0%    ~     (p=0.744 n=49+49)
GoTypes                         1.28M ± 0%        1.28M ± 0%    ~     (p=0.957 n=48+50)
Compiler                        5.39M ± 0%        5.39M ± 0%  +0.00%  (p=0.012 n=50+49)
SSA                             13.9M ± 0%        13.9M ± 0%  +0.02%  (p=0.000 n=47+49)
Flate                            230k ± 0%         230k ± 0%  -0.01%  (p=0.007 n=47+49)
GoParser                         292k ± 0%         292k ± 0%    ~     (p=0.891 n=50+49)
Reflect                          977k ± 0%         977k ± 0%    ~     (p=0.274 n=50+50)
Tar                              343k ± 0%         343k ± 0%    ~     (p=0.942 n=50+50)
XML                              418k ± 0%         418k ± 0%    ~     (p=0.374 n=50+49)
LinkCompiler                     516k ± 0%         516k ± 0%    ~     (p=0.205 n=49+47)
ExternalLinkCompiler             570k ± 0%         570k ± 0%    ~     (p=0.783 n=49+47)
LinkWithoutDebugCompiler         169k ± 0%         169k ± 0%    ~     (p=0.233 n=50+46)
[Geo mean]                       672k              672k       +0.00%

name                      old maxRSS/op     new maxRSS/op     delta
Template                        34.5M ± 3%        34.4M ± 3%    ~     (p=0.566 n=49+48)
Unicode                         36.0M ± 6%        35.9M ± 6%    ~     (p=0.736 n=50+50)
GoTypes                         75.7M ± 7%        75.4M ± 5%    ~     (p=0.412 n=50+50)
Compiler                         314M ±10%         313M ± 8%    ~     (p=0.708 n=50+50)
SSA                              730M ± 6%         735M ± 6%    ~     (p=0.324 n=50+50)
Flate                           25.8M ± 5%        25.6M ± 6%    ~     (p=0.415 n=49+50)
GoParser                        28.5M ± 3%        28.5M ± 4%    ~     (p=0.977 n=46+50)
Reflect                         57.4M ± 4%        57.2M ± 3%    ~     (p=0.173 n=50+50)
Tar                             33.3M ± 3%        33.2M ± 4%    ~     (p=0.621 n=48+50)
XML                             39.6M ± 5%        39.6M ± 4%    ~     (p=0.997 n=50+50)
LinkCompiler                     168M ± 2%         167M ± 1%    ~     (p=0.072 n=49+45)
ExternalLinkCompiler             179M ± 1%         179M ± 1%    ~     (p=0.147 n=48+50)
LinkWithoutDebugCompiler         136M ± 1%         136M ± 1%    ~     (p=0.789 n=47+49)
[Geo mean]                      79.2M             79.1M       -0.12%

name                      old text-bytes    new text-bytes    delta
HelloSize                       812kB ± 0%        811kB ± 0%  -0.06%  (p=0.000 n=50+50)

name                      old data-bytes    new data-bytes    delta
HelloSize                      13.3kB ± 0%       13.3kB ± 0%    ~     (all equal)

name                      old bss-bytes     new bss-bytes     delta
HelloSize                       206kB ± 0%        206kB ± 0%    ~     (all equal)

name                      old exe-bytes     new exe-bytes     delta
HelloSize                      1.21MB ± 0%       1.21MB ± 0%  -0.03%  (p=0.000 n=50+50)

file      before    after     Δ       %
addr2line 4057421   4056237   -1184   -0.029%
api       4952451   4946715   -5736   -0.116%
asm       4888993   4888185   -808    -0.017%
buildid   2617705   2616441   -1264   -0.048%
cgo       4521849   4520681   -1168   -0.026%
compile   19143451  19141243  -2208   -0.012%
cover     4847391   4837151   -10240  -0.211%
dist      3473877   3472565   -1312   -0.038%
doc       3821496   3820432   -1064   -0.028%
fix       3220587   3220659   +72     +0.002%
link      6587504   6582576   -4928   -0.075%
nm        4000154   3998690   -1464   -0.037%
objdump   4409449   4407625   -1824   -0.041%
pack      2398086   2393110   -4976   -0.207%
pprof     13599060  13606111  +7051   +0.052%
test2json 2645148   2645692   +544    +0.021%
trace     10355281  10355862  +581    +0.006%
vet       6780026   6779666   -360    -0.005%
total     106319929 106289641 -30288  -0.028%

Change-Id: Ia5399286958c187c8664c769bbddf7bc4c1cae99
Reviewed-on: https://go-review.googlesource.com/c/go/+/263600
Run-TryBot: eric fang <eric.fang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: eric fang <eric.fang@arm.com>
Reviewed-by: Keith Randall <khr@golang.org>
2020-10-21 19:08:11 +00:00
Kevin Burke
6af088bfc6 encoding/json: add "json: " prefix to SyntaxError messages
The other named errors - UnmarshalTypeError, etc - in this package do
the same, so we should prepend the package prefix to error messages
for consistency.

Add a note to the release docs in case this is interpreted as
a breaking change.

Fixes #36221.

Change-Id: Ie24b532bbf9812e108c259fa377e2a6b64319ed4
Reviewed-on: https://go-review.googlesource.com/c/go/+/263619
Run-TryBot: Kevin Burke <kev@inburke.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Kevin Burke <kev@inburke.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2020-10-21 18:50:01 +00:00
hk
612a363bef cmd/compile/internal/gc: fix comments
Change-Id: Id7b0ead39e961a16a85da3e308db10dd4f9b55c3
GitHub-Last-Rev: e640c4a61a
GitHub-Pull-Request: golang/go#42120
Reviewed-on: https://go-review.googlesource.com/c/go/+/264080
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2020-10-21 17:58:32 +00:00
Roland Shoemaker
b04eb73a68 crypto/x509: bypass signature verification in CreateCertificate when using MD5WithRSA
Bypasses the signature verification check we previously added if the
signature algorithm is MD5WithRSA, as we only support this algorithm
for signing and not verification.

Change-Id: Idba6dbba8b365d6199d467526746b88a5f734af1
Reviewed-on: https://go-review.googlesource.com/c/go/+/264019
Run-TryBot: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
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2020-10-21 17:13:25 +00:00
Joel Sing
6f45b39e4d cmd/compile,cmd/internal/obj/riscv: move g register on riscv64
The original riscv64 port used the thread pointer (TP aka X4) register for
the g pointer, however this register is also used when TLS support is
required, resulting in a conflict (for example, when a signal is received
we have no way of readily knowing if X4 contains a pointer to the TCB or
a pointer to a g).

In order to support cgo, free up the X4 register by moving g to X27.
This unfortunately means that the X4 register is unused in non-cgo mode,
however the alternative is to not support cgo on this platform.

Update #36641

Change-Id: Idcaf3e8ccbe42972a1b8943aeefde7149d9c960a
Reviewed-on: https://go-review.googlesource.com/c/go/+/263477
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-21 16:40:47 +00:00
Bryan C. Mills
214136b741 cmd/go/internal/fsys: use a root other than "." in Walk tests
Fixes #42115

Change-Id: Icf4c9eac5ed3295acbc8377c7a06f82c6bddc747
Reviewed-on: https://go-review.googlesource.com/c/go/+/264177
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
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Reviewed-by: David du Colombier <0intro@gmail.com>
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2020-10-21 16:19:42 +00:00
Obeyda Djeffal
bcc3333487 cmd/go: ignore GOFLAGS values without name in go env/bug
This happens with 'go env' and 'go bug'.

If GOFLAGS variable is set to something like '=value',
running `go env` panics with this error message:

    goroutine 1 [running]:
    cmd/go/internal/base.SetFromGOFLAGS(0xd96838)
        cmd/go/internal/base/goflags.go:101 +0x9a7
    main.main()
        cmd/go/main.go:188 +0x755

This happens when the 'name' of the flag is not
specified ('=' or '=value'), with any combination of other flags.
Other commands show this error message:
    go: parsing $GOFLAGS: non-flag

This happens only with 'env' and 'bug' because we have this:
https://go.googlesource.com/go/+/refs/heads/master/src/cmd/go/internal/base/goflags.go#40

New behaviour: ignore the bad flag, since we don't want to report
that with `go env` or `go bug`.

Fixes: #42013
Change-Id: I72602840ca00293d2a92ea28451b75b9799e3d6c
Reviewed-on: https://go-review.googlesource.com/c/go/+/263098
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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2020-10-21 15:03:58 +00:00
Paul E. Murphy
15ead857db cmd/compiler,cmd/go,sync: add internal {LoadAcq,StoreRel}64 on ppc64
Add an internal atomic intrinsic for load with acquire semantics
(extending LoadAcq to 64b) and add LoadAcquintptr for internal
use within the sync package.  For other arches, this remaps to the
appropriate atomic.Load{,64} intrinsic which should not alter code
generation.

Similarly, add StoreRel{uintptr,64} for consistency, and inline.

Finally, add an exception to allow sync to directly use the
runtime/internal/atomic package which avoids more convoluted
workarounds (contributed by Lynn Boger).

In an extreme example, sync.(*Pool).pin consumes 20% of wall time
during fmt tests.  This is reduced to 5% on ppc64le/power9.

From the fmt benchmarks on ppc64le:

name                           old time/op  new time/op  delta
SprintfPadding                  468ns ± 0%   451ns ± 0%   -3.63%
SprintfEmpty                   73.3ns ± 0%  51.9ns ± 0%  -29.20%
SprintfString                   135ns ± 0%   122ns ± 0%   -9.63%
SprintfTruncateString           232ns ± 0%   214ns ± 0%   -7.76%
SprintfTruncateBytes            216ns ± 0%   202ns ± 0%   -6.48%
SprintfSlowParsingPath          162ns ± 0%   142ns ± 0%  -12.35%
SprintfQuoteString             1.00µs ± 0%  0.99µs ± 0%   -1.39%
SprintfInt                      117ns ± 0%   104ns ± 0%  -11.11%
SprintfIntInt                   190ns ± 0%   175ns ± 0%   -7.89%
SprintfPrefixedInt              232ns ± 0%   212ns ± 0%   -8.62%
SprintfFloat                    270ns ± 0%   255ns ± 0%   -5.56%
SprintfComplex                 1.01µs ± 0%  0.99µs ± 0%   -1.68%
SprintfBoolean                  127ns ± 0%   111ns ± 0%  -12.60%
SprintfHexString                220ns ± 0%   198ns ± 0%  -10.00%
SprintfHexBytes                 261ns ± 0%   252ns ± 0%   -3.45%
SprintfBytes                    600ns ± 0%   590ns ± 0%   -1.67%
SprintfStringer                 684ns ± 0%   658ns ± 0%   -3.80%
SprintfStructure               2.57µs ± 0%  2.57µs ± 0%   -0.12%
ManyArgs                        669ns ± 0%   646ns ± 0%   -3.44%
FprintInt                       140ns ± 0%   136ns ± 0%   -2.86%
FprintfBytes                    184ns ± 0%   181ns ± 0%   -1.63%
FprintIntNoAlloc                140ns ± 0%   136ns ± 0%   -2.86%
ScanInts                        929µs ± 0%   921µs ± 0%   -0.79%
ScanRecursiveInt                122ms ± 0%   121ms ± 0%   -0.11%
ScanRecursiveIntReaderWrapper   122ms ± 0%   122ms ± 0%   -0.18%

Change-Id: I4d66780261b57b06ef600229e475462e7313f0d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/253748
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
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2020-10-21 14:34:44 +00:00
Richard Musiol
54c0237346 misc/wasm: improve error message if javascript polyfills are required
wasm_exec.js expects that either "require" is available or that the
globals "crypto", "TextEncoder" and "TextDecoder" are already defined.
Report a better error message if this is not the case, suggesting the
use of a polyfill.

Updates #41482

Change-Id: I5473cae15c98ae42e39f5928245b7762e7a5a8bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/261357
Trust: Richard Musiol <neelance@gmail.com>
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2020-10-21 13:19:35 +00:00
Richard Musiol
9848e93cb7 misc/wasm: make sure sp is unsigned
An i32 passed from WebAssembly to JavaScript is always read as a signed
integer. Use the bitshift operator to turn it into an unsigned integer.

Fixes #40923

Change-Id: Ia91ed2145dd2fc3071e2fc22b86ebfcb3c1e9f4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/261358
Trust: Richard Musiol <neelance@gmail.com>
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2020-10-21 09:34:39 +00:00
Tobias Klauser
491fe1b959 cmd/go: enable link syso test on linux/riscv64
Now that external linking is supported on linux/riscv64 (CL 243517),
re-enable the test previously disabled by CL 216259.

Updates #36739

Change-Id: I611548c587ca50f8bfab72c903ab0432e2b54198
Reviewed-on: https://go-review.googlesource.com/c/go/+/263797
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Joel Sing <joel@sing.id.au>
2020-10-21 07:36:08 +00:00
Cuong Manh Le
62f18d07ba doc/go1.16: document net TCP listener's backlog size update
Updates #41470

Change-Id: Iebd3a339504aa7f8834853d6a740557fb3bce3ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/262938
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
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2020-10-21 00:59:25 +00:00
Jay Conrod
cfb087c683 cmd/go: fix TestScript/test_cache_inputs
Small fix for a new failure in CL 263142

For #41190

Change-Id: I733bc1998d87b505b52d429916c45afe2968a709
Reviewed-on: https://go-review.googlesource.com/c/go/+/264057
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2020-10-21 00:22:37 +00:00
Dan Scales
f121e0eddd cmd/compile: fix nodedump output for types of nodes
The Dbg dumping of complex types was broken, because (I think) of a
recent change to handle recursive types correctly. Before this fix,
the Dump output of a closure node (where the last thing on the line is
the type of the node) was:

.   .   CLOSURE l(8) esc(h) tc(1) FUNC-@0

after this change it is:

.   .   CLOSURE l(8) esc(h) tc(1) FUNC-func(int) int

The problem is that that the 'mode == Fdbg' code was immediately
aborting the descent into tconv2, since it was calling down with the
same node that was just entered into the hash table.

Change-Id: Iee106b967cea1856dd92d4350681401dd34a23b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/264025
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2020-10-20 23:37:53 +00:00
Constantin Konstantinidis
3ca3ca51d7 cmd/compile: enforce strongly typed rules for ARM (to32)
Type casting changed to 32 from 64.
L1055-L1056
L1193-L1194, L1197-L1198

toolstash-check successful.

Change-Id: Icdb9985673292294bc4549afaaa6cf4fcf92ffa8
Reviewed-on: https://go-review.googlesource.com/c/go/+/257640
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
2020-10-20 22:59:31 +00:00
Martin Möhrmann
b7a2d413a3 testing: print cpu type as label for benchmarks
Supports 386 and amd64 architectures on all operating systems.

Example output:
$ go test -bench=.*
goos: darwin
goarch: amd64
pkg: strconv
cpu: Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz
BenchmarkAtof64Decimal-4        	24431032	        46.8 ns/op
...

As the displayed CPU information is only used for information
purposes it is lazily initialized when needed using the new
internal/sysinfo package.

This allows internal/cpu to stay without dependencies and avoid
initialization costs when the CPU information is not needed as
the new code to query the CPU name in internal/cpu can be
dead code eliminated if not used.

Fixes #39214

Change-Id: I77ae5c5d2fed6b28fa78dd45075f9f0a6a7f1bfd
Reviewed-on: https://go-review.googlesource.com/c/go/+/263804
Trust: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2020-10-20 21:30:18 +00:00
Russ Cox
80182d45b5 go/build: refactor per-file info & reader
Make code cleaner and a bit more adaptable:
instead of an ever-growing list of arguments and results for readImports,
put everything in a fileInfo struct, and rename function to readGoInfo.
(Not a goInfo struct because it gets used for non-Go source files as well,
but that processing is much simpler.)

The refactoring simplifies the embed work in the next CL,
but this CL makes no semantic changes.

For #41191.

Change-Id: Id2de2a3b8d351adc1c919dcf79dfbe79fc3d5301
Reviewed-on: https://go-review.googlesource.com/c/go/+/243940
Trust: Russ Cox <rsc@golang.org>
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2020-10-20 20:44:22 +00:00
Ian Lance Taylor
7f736694fe runtime: use GOTRACEBACK=system for TestCgoExecSignalMask
Try to get a bit more information to understand #42093.

For #42093

Change-Id: I818feb08d7561151d52eba3e88c418b55b9f9c1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/264018
Trust: Ian Lance Taylor <iant@golang.org>
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2020-10-20 20:17:14 +00:00
Michael Matloob
5e9582e3f0 cmd/go: support overlays for synthesized packages.
The main missing piece here was supporting Stat in the overlay
filesystem, in the parts of the package code that determines whether
an command line argument is a file on disk or a directory.  so this
change adds a Stat function to the fsys package. It's implemented the
same way as the already existing fsys.lstat function, but instead of
os.Lstat, it calls os.Stat on disk files.

Then, the change changes parts of the package code to use the overlay
Stat instead of the os package's Stat.

For #39958

Change-Id: I8e478ae386f05b48d7dd71bd7e47584f090623df
Reviewed-on: https://go-review.googlesource.com/c/go/+/262617
Trust: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
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2020-10-20 20:13:16 +00:00
Cherry Zhang
c9c64886ef cmd/internal/obj: reject too large symbols
We never supported symbol larger than 2GB (issue #9862), so the
object file uses 32-bit for symbol sizes. Check and reject too
large symbol before truncating its size.

Fixes #42054.

Change-Id: I0d1d585ebdba9556f2fd3a97043bd4296d5cc9e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/263641
Trust: Cherry Zhang <cherryyz@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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2020-10-20 18:51:03 +00:00
Jay Conrod
e2c420591c cmd/go/internal/modload: remove printStackInDie functionality
Previously, when running cmd/go tests, if the module root directory is
requested when modules are explicitly disabled, we printed a stack
trace in addition to the error message that's normally printed. The
stack trace isn't that useful, and it makes the actual error hard to
find.

Change-Id: I8230d668f3f16659f08d0d685124c41b4055c5b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/263659
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2020-10-20 18:46:31 +00:00
Russ Cox
1b09d43067 all: update references to symbols moved from io/ioutil to io
The old ioutil references are still valid, but update our code
to reflect best practices and get used to the new locations.

Code compiled with the bootstrap toolchain
(cmd/asm, cmd/dist, cmd/compile, debug/elf)
must remain Go 1.4-compatible and is excluded.
Also excluded vendored code.

For #41190.

Change-Id: I6d86f2bf7bc37a9d904b6cee3fe0c7af6d94d5b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/263142
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-10-20 18:41:18 +00:00
Russ Cox
cb0a0f52e6 io: adopt Discard, NopCloser, ReadAll from io/ioutil
As proposed and approved in #40025, Discard, NopCloser, and ReadAll
do not really fit into io/ioutil, which exists mainly to hold things that
would cause an import cycle if implemented in io itself, which is to say
things that import "os".

These three do not import "os" - they are generic io helpers like
many of the things in io itself, so it makes sense for them to be there.

Fixes #40025.

Change-Id: I77f47e9b2a72839edf7446997936631980047b67
Reviewed-on: https://go-review.googlesource.com/c/go/+/263141
Trust: Russ Cox <rsc@golang.org>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 18:41:16 +00:00
Russ Cox
7211694a1e net/http: add FS to convert fs.FS to FileSystem
Two different functions in the http API expect a FileSystem:
http.FileSystem and http.NewFileTransport.
Add a general converter http.FS to turn an fs.FS into an http.FileSystem
for use with either of these functions.

(The original plan was to add http.HandlerFS taking an fs.FS directly,
but that doesn't help with NewFileTransport.)

For #41190.

Change-Id: I5f242eafe9b963f4387419a2615bdb487c358f16
Reviewed-on: https://go-review.googlesource.com/c/go/+/243939
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 18:41:15 +00:00
Russ Cox
2a9aa4dcac html/template, text/template: add ParseFS
Now templates can be parsed not just from operating system files
but from arbitrary file systems, including zip files.

For #41190.

Change-Id: I2172001388ddb1f13defa6c5e644e8ec8703ee80
Reviewed-on: https://go-review.googlesource.com/c/go/+/243938
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 18:41:14 +00:00
Russ Cox
1296ee6b4f archive/zip: make Reader implement fs.FS
Now a zip.Reader (an open zip file) can be passed to code
that accepts a file system, such as (soon) template parsing.

For #41190.

Change-Id: If51b12e39db3ccc27f643c2453d3300a38035360
Reviewed-on: https://go-review.googlesource.com/c/go/+/243937
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 18:41:12 +00:00
Russ Cox
b64202bc29 io/fs: add Glob and GlobFS
Add Glob helper function, GlobFS interface, and test.
Add Glob method to fstest.MapFS.
Add testing of Glob method to fstest.TestFS.

For #41190.

Change-Id: If89dd7f63e310ba5ca2651340267a9ff39fcc0c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/243915
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:53:14 +00:00
Russ Cox
7a131acfd1 io/fs: add ReadDir and ReadDirFS
Add ReadDir helper function, ReadDirFS interface, and test.
Add ReadDir method to fstest.MapFS.
Add testing of ReadDir method to fstest.TestFS.

For #41190.

Change-Id: Ib860770ec7433ba77b29e626682b238f1b3bf54f
Reviewed-on: https://go-review.googlesource.com/c/go/+/243914
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:53:07 +00:00
Russ Cox
10a1a1a37c io/fs: add Stat and StatFS
Add Stat helper function, StatFS interface, and test.
Add Stat method to fstest.MapFS.
Add testing of Stat method to fstest.TestFS.

For #41190.

Change-Id: Icf8b6eb1c3fa6f93a9be8405ec5a9468fb1da97b
Reviewed-on: https://go-review.googlesource.com/c/go/+/243913
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:53:02 +00:00
Russ Cox
f098ccf04a io/fs: add ReadFile and ReadFileFS
Add ReadFile helper function, ReadFileFS interface, and test.
Add ReadFile method to fstest.MapFS.
Add testing of ReadFile method to fstest.TestFS.

For #41190.

Change-Id: I5b6a41e2e582824e570463b698b635abaa436c32
Reviewed-on: https://go-review.googlesource.com/c/go/+/243912
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:52:55 +00:00
Russ Cox
b1f76f7a22 os: add DirFS
It will inevitably be important to be able to pass an operating system
directory to code written to expect an fs.FS.

os.DirFS provides the conversion.

For #41190.

Change-Id: Id1a8fcbe4c7a30de2c47dea0504e9481a88b1b39
Reviewed-on: https://go-review.googlesource.com/c/go/+/243911
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:52:48 +00:00
Russ Cox
90c924ff88 testing/fstest: new package for testing file system code
This change adds basic test helpers for file system code.

The type MapFS is a simple map-based file system for use when
exercising general file system code.

The func TestFS tests a file system implementation.

For #41190.

Change-Id: I5a2036f57e733915ad508651ad7317749794423c
Reviewed-on: https://go-review.googlesource.com/c/go/+/243910
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-20 17:52:41 +00:00
Than McIntosh
d595712540 cmd/asm: rename "compiling runtime" flag
Rename the assembler "-compilingRuntime" flag to "-compiling-runtime",
to be more consistent with the flag style of other Go commands.

Change-Id: I8cc5cbf0b9b34d1dd4e9fa499d3fec8c1ef10b6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/263857
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-20 17:47:31 +00:00
Bryan C. Mills
f62d3202bf cmd/go/internal/renameio: include ios in the darwin test-flake mitigation
Because the "ios" build constraint implies "darwin", it is already
included in the general "darwin" flakiness workaround in
cmd/go/internal/robustio. We just need to relax the renameio test
to avoid false-positives there.

I do not expect this change to drive the rate of false-positives down
to zero, but it should at least reduce noise on the build dashboard.

For #42066

Change-Id: Ia33dbd33295fce5b3261b4831f2807ce29b82e65
Reviewed-on: https://go-review.googlesource.com/c/go/+/263777
Trust: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2020-10-20 17:36:42 +00:00
Michael Anthony Knyszek
05f5ae74bc runtime: fix scavenging tests for pallocChunkBytes huge pages and larger
Currently the scavenging tests implicitly assume that the system huge
page size is always strictly less than 4 MiB, or pallocChunkBytes. This
leads to failures on systems with huge pages of this size, and larger.

Filter out those tests on such platforms and add a test for the 4 MiB
case. The scavenger is already equipped to handle this case.

Huge page sizes > 4 MiB are effectively ignored, so also add a test case
to ensure that happens.

Unfortunately we can't actually run these tests in our CI because they
require the platform to provide the right huge page size, but we really
should just parameterize this value so we can test it (there's a TODO
about this already).

Fixes #42053.

Change-Id: Ia576cbf67e178a14a178a893967efbed27d6eb17
Reviewed-on: https://go-review.googlesource.com/c/go/+/263837
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
2020-10-20 15:19:09 +00:00
Daniel Martí
0bf507efe9 cmd/go: add BuildID to list -json -export
That is, the following two pieces of shell code are now equivalent:

	$ go tool buildid $(go list -export -f {{.Export}} strings)
	v_0VqA6yzwuMg2dn4u57/PXcIR2Pb8Mi9yRdcdkwe

	$ go list -export -f {{.BuildID}} strings
	v_0VqA6yzwuMg2dn4u57/PXcIR2Pb8Mi9yRdcdkwe

This does not expose any information that wasn't available before, but
makes this workflow simpler and faster. In the first example, we have to
execute two programs, and 'go tool buildid' has to re-open the export
data file to read the build ID.

With the new mechanism, 'go list -export' already has the build ID
ready, so we can simply print it out. Moreover, when listing lots of
related packages like './...', we can now obtain all their build IDs at
once.

Fixes #37281.

Change-Id: I8e2f65a08391b3df1a628c6e06e708b8c8cb7865
Reviewed-on: https://go-review.googlesource.com/c/go/+/263542
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-10-20 15:17:15 +00:00
Tobias Klauser
0709e58bee net/http/cgi: preserve env vars on illumos
Preserve the same environment variables as on solaris.

Spotted while reviewing CL 263577.

Change-Id: Id479dcf83d6231e9ef1fd2404b400d10082e1d0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/263802
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-10-20 14:04:18 +00:00
Martin Möhrmann
feb984c96b internal/cpu: make architectures without initialization work explicit
When cpu_no_init.go was created most architectures did not have
code in the doinit function. Currently only mips(le), riscv64 and
wasm do not have empty doinit functions.

Keeping cpu_no_init.go around does not reduce the work to satisfy
the build process when adding support for new architectures.

To support a new architecture a new file or build directive has to
be added to an existing file at any rate to define the constant
CacheLinePadSize. A new empty doinit can then be created in the
new file or the existing doinit can be reused when adding the
additional build directive.

Change-Id: I58a97f8cdf1cf1be85c37f4550c40750358aa031
Reviewed-on: https://go-review.googlesource.com/c/go/+/263801
Trust: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2020-10-20 12:10:43 +00:00