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Commit Graph

37509 Commits

Author SHA1 Message Date
Yury Smolsky
c3533d7a26 cmd/cover: remove unused global var and the unquote function
Change-Id: I52a39f2d8f1a296f23624e3ec577d9ad1b8302f1
Reviewed-on: https://go-review.googlesource.com/126555
Run-TryBot: Yury Smolsky <yury@smolsky.by>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-20 14:10:05 +00:00
Ben Shi
26d62b4ca9 cmd/internal/obj/arm64: add SWPALD/SWPALW/SWPALH/SWPALB
Those new instructions have acquire/release semantics, besides
normal atomic SWPD/SWPW/SWPH/SWPB.

Change-Id: I24821a4d21aebc342897ae52903aef612c8d8a4a
Reviewed-on: https://go-review.googlesource.com/128476
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-08-20 14:09:51 +00:00
Ben Shi
285747b900 cmd/compile: optimize ARM's comparision
Since MULA&MULS cost more CPU cycles than MUL, so
	MUL Rx, Ry, Rd
	CMP Ra, Rd
cost less cycles than
	MULA Rx, Ry, Ra, Rd
	CMP $0, Rd

This CL implement that optimization, and the GobEncode-4 of the go1 benchmark
got a little improvement, while other cases got little impact (noise excluded).

name                     old time/op    new time/op    delta
BinaryTree17-4              25.2s ± 1%     25.2s ± 0%    ~     (p=0.420 n=30+29)
Fannkuch11-4                13.3s ± 0%     13.3s ± 0%  +0.03%  (p=0.003 n=27+30)
FmtFprintfEmpty-4           406ns ± 0%     405ns ± 0%    ~     (p=0.309 n=30+30)
FmtFprintfString-4          672ns ± 0%     670ns ± 0%  -0.32%  (p=0.000 n=29+29)
FmtFprintfInt-4             717ns ± 0%     714ns ± 0%  -0.42%  (p=0.000 n=27+22)
FmtFprintfIntInt-4         1.07µs ± 0%    1.07µs ± 0%  +0.11%  (p=0.000 n=19+30)
FmtFprintfPrefixedInt-4    1.12µs ± 0%    1.12µs ± 0%  -0.43%  (p=0.000 n=23+30)
FmtFprintfFloat-4          2.25µs ± 0%    2.25µs ± 0%    ~     (p=0.509 n=29+29)
FmtManyArgs-4              4.01µs ± 1%    4.00µs ± 0%  -0.35%  (p=0.000 n=30+30)
GobDecode-4                53.6ms ± 4%    51.9ms ± 2%  -3.17%  (p=0.000 n=30+30)
GobEncode-4                51.1ms ± 2%    50.6ms ± 2%  -0.98%  (p=0.000 n=30+30)
Gzip-4                      2.61s ± 0%     2.61s ± 0%    ~     (p=0.504 n=30+30)
Gunzip-4                    312ms ± 0%     312ms ± 0%    ~     (p=0.866 n=30+30)
HTTPClientServer-4          977µs ± 7%     974µs ± 8%    ~     (p=0.804 n=30+29)
JSONEncode-4                127ms ± 1%     125ms ± 2%  -1.88%  (p=0.000 n=29+29)
JSONDecode-4                435ms ± 3%     431ms ± 2%  -0.80%  (p=0.005 n=30+30)
Mandelbrot200-4            18.4ms ± 0%    18.4ms ± 0%  -0.02%  (p=0.006 n=29+25)
GoParse-4                  22.4ms ± 0%    22.4ms ± 0%    ~     (p=0.105 n=27+29)
RegexpMatchEasy0_32-4       753ns ± 0%     753ns ± 0%    ~     (all equal)
RegexpMatchEasy0_1K-4      4.32µs ± 0%    4.32µs ± 0%    ~     (p=0.554 n=29+28)
RegexpMatchEasy1_32-4       788ns ± 0%     788ns ± 0%    ~     (all equal)
RegexpMatchEasy1_1K-4      5.54µs ± 0%    5.55µs ± 0%  +0.03%  (p=0.013 n=29+30)
RegexpMatchMedium_32-4     1.08µs ± 0%    1.08µs ± 0%    ~     (p=0.443 n=28+28)
RegexpMatchMedium_1K-4      258µs ± 0%     258µs ± 0%    ~     (p=0.932 n=30+28)
RegexpMatchHard_32-4       14.8µs ± 0%    14.8µs ± 0%  -0.06%  (p=0.021 n=30+30)
RegexpMatchHard_1K-4        442µs ± 0%     442µs ± 0%    ~     (p=0.554 n=29+30)
Revcomp-4                  41.7ms ± 1%    41.7ms ± 1%    ~     (p=0.763 n=28+30)
Template-4                  528ms ± 1%     528ms ± 0%    ~     (p=0.072 n=30+29)
TimeParse-4                3.31µs ± 0%    3.31µs ± 0%    ~     (p=0.215 n=30+30)
TimeFormat-4               6.07µs ± 0%    6.07µs ± 0%    ~     (p=0.733 n=30+30)
[Geo mean]                  386µs          385µs       -0.29%

name                     old speed      new speed      delta
GobDecode-4              14.3MB/s ± 4%  14.8MB/s ± 2%  +3.23%  (p=0.000 n=30+30)
GobEncode-4              15.0MB/s ± 2%  15.2MB/s ± 2%  +0.99%  (p=0.000 n=30+30)
Gzip-4                   7.44MB/s ± 0%  7.44MB/s ± 0%    ~     (p=0.328 n=29+30)
Gunzip-4                 62.2MB/s ± 0%  62.2MB/s ± 0%    ~     (p=0.905 n=30+30)
JSONEncode-4             15.2MB/s ± 1%  15.5MB/s ± 2%  +1.93%  (p=0.000 n=29+29)
JSONDecode-4             4.46MB/s ± 3%  4.50MB/s ± 2%  +0.79%  (p=0.007 n=30+30)
GoParse-4                2.58MB/s ± 1%  2.58MB/s ± 1%    ~     (p=0.223 n=29+30)
RegexpMatchEasy0_32-4    42.5MB/s ± 0%  42.5MB/s ± 0%    ~     (p=0.964 n=30+30)
RegexpMatchEasy0_1K-4     237MB/s ± 0%   237MB/s ± 0%    ~     (p=0.392 n=29+28)
RegexpMatchEasy1_32-4    40.6MB/s ± 0%  40.6MB/s ± 0%    ~     (p=0.974 n=30+29)
RegexpMatchEasy1_1K-4     185MB/s ± 0%   185MB/s ± 0%  -0.03%  (p=0.012 n=29+30)
RegexpMatchMedium_32-4    920kB/s ± 0%   920kB/s ± 0%    ~     (all equal)
RegexpMatchMedium_1K-4   3.97MB/s ± 0%  3.97MB/s ± 0%    ~     (all equal)
RegexpMatchHard_32-4     2.17MB/s ± 0%  2.17MB/s ± 0%  +0.18%  (p=0.000 n=30+28)
RegexpMatchHard_1K-4     2.32MB/s ± 0%  2.32MB/s ± 0%    ~     (all equal)
Revcomp-4                61.0MB/s ± 1%  61.0MB/s ± 1%    ~     (p=0.744 n=28+30)
Template-4               3.68MB/s ± 1%  3.67MB/s ± 0%    ~     (p=0.147 n=30+29)
[Geo mean]               12.7MB/s       12.7MB/s       +0.41%

Change-Id: Ic6053c350c94e9bf57db16542e1370b848155342
Reviewed-on: https://go-review.googlesource.com/129535
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-08-20 14:08:53 +00:00
Ben Shi
bd483592a2 cmd/compile/internal/x86: simplify 387 with FLDZ and FLZ1
FLD1 pushes +1.0 to the 387 register stack, and FLDZ pushes +0.0
to the 387 regiser stack.

They can be used to simplify MOVSSconst/MOVSDconst when the
constant is +0.0, -0.0, +1.0, -1.0.

The size of the go executable reduces about 62KB and the total size
of pkg/linux_386 reduces about 7KB with this optimization.

Change-Id: Icc8213b58262e0024a277cf1103812a17dd4b05e
Reviewed-on: https://go-review.googlesource.com/119635
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2018-08-20 14:05:37 +00:00
Yury Smolsky
5403b8eceb cmd/compile: remove empty branches
Change-Id: Id87d9f55d1714fc553f5b1a9cba0f2fe348dad3e
Reviewed-on: https://go-review.googlesource.com/126396
Run-TryBot: Yury Smolsky <yury@smolsky.by>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-20 13:42:37 +00:00
Daniel Martí
3b7b9dce43 cmd/compile/internal/gc: various minor cleanups
Two funcs and a field were unused. Remove them.

A few statements could be made simpler.

importsym's pos parameter was unused, so remove it.

Finally, don't use printf-like funcs with constant strings that have no
formatting directives.

Change-Id: I415452249bf2168aa353ac4f3643dfc03017ee53
Reviewed-on: https://go-review.googlesource.com/117699
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
2018-08-20 13:27:53 +00:00
Daniel Martí
9e4d87d115 all: update stale test skips
Issues #10043, #15405, and #22660 appear to have been fixed, and
whatever tests I could run locally do succeed, so remove the skips.

Issue #7237 was closed in favor of #17906, so update its skip line.

Issue #7634 was closed as it had not appeared for over three years.
Re-enable it for now. An issue should be open if the test starts being
skipped again.

Change-Id: I67daade906744ed49223291035baddaad9f56dca
Reviewed-on: https://go-review.googlesource.com/121735
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-20 13:10:24 +00:00
Daniel Martí
0566ab3383 strings: add Builder.Cap
To report the capacity of the underlying buffer. The method mirrors
bytes.Buffer.Cap.

The method can be useful to know whether or not calling write or grow
methods will result in an allocation, or to know how much memory has
been allocated so far.

Fixes #26269.

Change-Id: I391db45ae825011566b594836991e28135369a78
Reviewed-on: https://go-review.googlesource.com/122835
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-20 13:04:52 +00:00
Daniel Martí
b2e66f1aec cmd/vet: rewrite structtag using go/types
This lets us simplify the code considerably. For example, unquoting the
tag is no longer necessary, and we can get the field name with a single
method call.

While at it, fix a typechecking error in testdata/structtag.go, which
hadn't been caught since vet still skips past go/types errors in most
cases.

Using go/types will also let us expand the structtag check more easily
if we want to, for example to allow it to check for duplicates in
embedded fields.

Finally, update one of the test cases to check for regressions when we
output invalid tag strings. We also checked that these two changes to
testdata/structtag.go didn't fail with the old structtag check.

For #25593.

Change-Id: Iea4906d0f30a67f36b28c21d8aa96251aae653f5
Reviewed-on: https://go-review.googlesource.com/115676
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Rob Pike <r@golang.org>
2018-08-20 12:54:31 +00:00
Tobias Klauser
88aa208024 syscall: use private copy of ustat_t on Linux
Port CL 120295 from golang.org/x/sys/unix to the syscall package.

The ustat syscall has been deprecated on Linux for a long time and the
upcoming glibc 2.28 will remove ustat.h and it can no longer be used to
to generate the Ustat_t wrapper type. Since Linux still provides the
syscall, let's not break this functionality and add a private copy of
struct ustat so Ustat_t can still be generated.

Fixes golang/go#25990

Change-Id: I0dab2ba1cc76fbd21553b499f9256fd9d59ca409
Reviewed-on: https://go-review.googlesource.com/120563
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-08-20 08:01:43 +00:00
Iskander Sharipov
dc79206aec net: combine append calls in reverseaddr
Combined appends lead to fewer machine code and faster performance.
Some may even say that it makes code more readable.

Running revAddrTests over reverseaddr gives measurable improvements:

	name              old time/op  new time/op  delta
	ReverseAddress-8  4.10µs ± 3%  3.94µs ± 1%  -3.81%  (p=0.000 n=10+9)

Change-Id: I9bda7a20f802bcdffc6e948789765d04c6da04e7
Reviewed-on: https://go-review.googlesource.com/117615
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-20 05:23:29 +00:00
Daniel Martí
e0faedbb53 cmd/go: add missing newlines in printf formats
These are all errors given by module-aware cmd/go, so they must end with
a newline. It looks like they were omitted by mistake.

Fixes #27081.

Change-Id: I19b5803bb48a6d5dd52e857f483278fe20fe246b
Reviewed-on: https://go-review.googlesource.com/129780
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-08-20 03:32:43 +00:00
Austin Clements
edf81050a8 doc/go1.11: Delve 1.1.0 added support for method calls
Change-Id: I5f887f9831378cf76f5a9f447f481ea24c63f390
Reviewed-on: https://go-review.googlesource.com/129803
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-20 02:42:36 +00:00
Russ Cox
bf80e3b564 cmd/go: fix module get -insecure
Need to actually use the flag for it to take effect.

Fixes #27049.

Change-Id: I57227b45f46f9dd67ecbf87c11bb2d08124bcfa0
Reviewed-on: https://go-review.googlesource.com/129801
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 18:23:06 +00:00
Russ Cox
c5046bca7b cmd/go/internal/modconv: fix TestConvertLegacyConfig expectations
It was a bug to find that commit in the Masterminds/semver repo.
It's not part of the main repo but only part of an unmerged pull request.
The code was updated to try not to look at unmerged pull requests,
but the test was not. Worse, whether the code succeeds at not looking
at unmerged pull requests apparently depends on the git version.
Sigh.

Fixes #26754.
Fixes #27043.

Change-Id: Ib9e07f565906de4f1169244911a258396688f14d
Reviewed-on: https://go-review.googlesource.com/129800
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 18:23:02 +00:00
Russ Cox
5d750db024 cmd/go: fix go mod tidy crash on empty module
Fixes #27066.

Change-Id: Iede4385ad86b42d7d90814965b161a7e64d29833
Reviewed-on: https://go-review.googlesource.com/129799
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 18:22:57 +00:00
Russ Cox
cc880de4be cmd/go: allow 'go run x.go' to use nearby internal imports in module mode
In GOPATH mode the rule has always been that 'go run x.go' can
import whatever the package in x.go's directory would be able to
import. Apply the same rule here.

The bad import path was triggering other mysterious errors
during 'go run' in other circumstances. Setting it correctly fixes
those too.

Fixes #26046.
Fixes #27022.

Change-Id: I0a9b0a154a20f48add5a199da85572e7ffe0cde4
Reviewed-on: https://go-review.googlesource.com/129798
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 18:22:51 +00:00
Russ Cox
239b8f2edc cmd/go: fix and reenable TestAccidentalGitCheckout
This is an important security problem so we shouldn't disable the test.
The second half was failing on case-sensitive file systems but the
first half is still good.

Fixes #22983.

Change-Id: I437bb4c9f78eb3177aa8b619e2357b2539566ca9
Reviewed-on: https://go-review.googlesource.com/129797
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 18:22:46 +00:00
Russ Cox
714c141c4f cmd/go: update TestGoGetUpdateWithWildcard expected behavior
If you run

	go get -u github.com/rsc/foo/bar...

then the go get command has always worked hard to make sure
that it applies the wildcard after downloading rsc/foo.
(If it applied the wildcard only before downloading rsc/foo,
it would match nothing if you had an empty GOPATH before,
and you'd still have an empty afterward, which is clearly useless.)

The goal has always been that if you run the same go get
command twice, the second command doesn't find anything
new to do.

CL 19892 worked around an "internal error" failure but broke
the rule about the first command doing everything the second
command would. Suppose you had github.com/rsc/foo already,
with just github.com/rsc/foo/bar, and you run

	go get -u github.com/rsc/...

The wildcard first matches github.com/rsc/foo/bar, but suppose
updating the repo pulls down github.com/rsc/foo/baz, which
in turn depends on the non-existent package github.com/rsc/quux.
We need to reevaluate the wildcard after the download.

The new pattern match refactoring makes this easier and happened
to have corrected the behavior, but we missed a long test that
expected the old behavior.

Fix that long test.

Change-Id: I088473e7a90925e5c0f9697da9554a11456ddd08
Reviewed-on: https://go-review.googlesource.com/129796
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-08-18 03:02:40 +00:00
Russ Cox
850c964be2 cmd/go: treat VCS errors as hard errors in module search
If we're looking for a module for a/b/c/d/e,
we check for a module named a/b/c/d/e,
then a/b/c/d, then a/b/c, then a/b, then a.
If we know the source repo for a/b/c and that
fails, we should report that error instead of
continuing the loop: a/b and a are useless,
and the error from a/b/c contains important
information.

The errors are now a bit more verbose than
I'd like but they will suffice for Go 1.11.

$ go get github.com/bradfitz/private/sonos
go get github.com/bradfitz/private/sonos: git ls-remote -q origin in /Users/rsc/pkg/mod/cache/vcs/61e3c76780847e514802ec6af8f940f641c6017f711444f05c59cb17ac46d456: exit status 128:
	remote: Repository not found.
	fatal: repository 'https://github.com/bradfitz/private/' not found
$ go list launchpad.net/gocheck
can't load package: package launchpad.net/gocheck: unknown import path "launchpad.net/gocheck": bzr branch --use-existing-dir https://launchpad.net/~niemeyer/gocheck/trunk . in /Users/rsc/pkg/mod/cache/vcs/f46ce2ae80d31f9b0a29099baa203e3b6d269dace4e5357a2cf74bd109e13339: exec: "bzr": executable file not found in $PATH
$

Fixes #26885.
Fixes #26982.

Change-Id: I2f9cf1853d2d68af18adad668c80513b6ba220d6
Reviewed-on: https://go-review.googlesource.com/129683
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 00:59:35 +00:00
Russ Cox
4864decf04 cmd/go: remove go mod fix, add go help go.mod
"go mod fix" does work already done by nearly every other go command.
It was also confusing why we had both "go mod fix" and "go mod tidy".
Delete "go mod fix".

The main reason we kept "go mod fix" this long was for the discussion
of automatic go.mod updates in its documentation, which is now moved
into a new "go help go.mod".

Fixes #26831.

Change-Id: Ic95ca8918449ab79791d27998e02eb3377ac7972
Reviewed-on: https://go-review.googlesource.com/129682
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-18 00:59:32 +00:00
Russ Cox
16a72125d5 cmd/go/internal/modfetch: correct TestCodeRepo expectation
The proxy protocol was simplified to only send
(and only receive) the Path and Version fields
in the JSON blob, not Name and Short.
(Those make sense when querying a VCS repo directly,
but not when talking about extracted modules.)
So don't expect them in the test.

Fixes #27042.

Change-Id: I3daacd668126e2227dcc8e6b89ee0cf0e3c8497c
Reviewed-on: https://go-review.googlesource.com/129684
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-17 23:17:09 +00:00
David du Colombier
0a842d5560 os: handle TMPDIR in TempDir on Plan 9
CL 129063 added a test in TestScript/mod_enabled,
which was failing on Plan 9.

The test was failing because the Init function
of the cmd/go/internal/modload package was
expecting ModRoot to be part of os.TempDir.

However, ModRoot was set to TMPDIR, while
os.TempDir is returning /tmp on Plan 9.

This change fixes the implementation of
os.TempDir on Plan 9 to handle the TMPDIR
environment variable, similarly to Unix.

Fixes #27065.

Change-Id: Id6ff926c5c379f63cab2dfc378fa6c15293fd453
Reviewed-on: https://go-review.googlesource.com/129775
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-17 23:12:06 +00:00
Russ Cox
64fae25286 cmd/go: do not turn list ./nonexist into a network lookup
If you're in a directory corresponding to x/y
and you run go list ./z, we do at some point
want to turn that into x/y/z. But if ./z does
not exist that will make the go command
check the network to see if it can find x/y/z.
That's clearly wrong: ./z means that directory,
nothing else. And it turns a typo into a long delay,
which is even worse.

Fixes #26874.

Change-Id: Iec15fa7b359af11b6a4fc6cb082e593658fb6e41
Reviewed-on: https://go-review.googlesource.com/129061
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-17 19:22:03 +00:00
Russ Cox
8dd27b1864 cmd/go: report which patterns match each package in list
It's important for some uses of go/packages, as well as for some
of go/packages's internal use, to be able to tell which results from
go list output correspond to which patterns, keeping in mind that
a single package might have been matched by multiple patterns.

Also adds test for #26925.

Change-Id: I708ac162f65d9946fe6afb244b08dc7b04d2b530
Reviewed-on: https://go-review.googlesource.com/129060
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-17 19:22:02 +00:00
Russ Cox
2ce6da0be3 cmd/go: fix -gcflags, -ldflags not applying to current directory
A flag setting like -gcflags=-e applies only to the packages
named on the command line, not to their dependencies.
The way we used to implement this was to remember the
command line arguments, reinterpret them as pattern matches
instead of package argument generators (globs), and apply them
during package load. The reason for this complexity was to
address a command-line like:

	go build -gcflags=-e fmt runtime

The load of fmt will load dependencies, including runtime,
and the load of runtime will reuse the result of the earlier load.
Because we were computing the effective -gcflags for each
package during the load, we had to have a way to tell, when
encountering runtime during the load of fmt, that runtime had
been named on the command line, even though we hadn't
gotten that far. That would be easy if the only possible
arguments were import paths, but we also need to handle

	go build -gcflags=-e fmt runt...
	go build -gcflags=-e fmt $GOROOT/src/runtime
	go build -gcflags=-e fmt $GOROOT/src/runt...
	and so on.

The match predicates usually did their job well, but not
always. In particular, thanks to symlinks and case-insensitive
file systems and unusual ways to spell file paths, it's always
been possible in various corner cases to give an argument
that evalutes to the runtime package during loading but
failed to match it when reused to determine "was this package
named on the command line?"

CL 109235 fixed one instance of this problem by making
a directory pattern match case-insensitive on Windows, but that
is incorrect in some other cases and doesn't address the root problem,
namely that there will probably always be odd corner cases
where pattern matching and pattern globbing are not exactly aligned.

This CL eliminates the assumption that pattern matching
and pattern globbing are always completely in agreement,
by simply marking the packages named on the command line
after the package load returns them. This means delaying
the computation of tool flags until after the load too,
for a few different ways packages are loaded.
The different load entry points add some complexity,
which is why the original approach seemed more attractive,
but the original approach had complexity that we simply
didn't recognize at the time.

This CL then rolls back the CL 109235 pattern-matching change,
but it keeps the test introduced in that CL. That test still passes.

In addition to fixing ambiguity due to case-sensitive file systems,
this new approach also very likely fixes various ambiguities that
might arise from abuse of symbolic links.

Fixes #24232.
Fixes #24456.
Fixes #24750.
Fixes #25046.
Fixes #25878.

Change-Id: I0b09825785dfb5112fb11494cff8527ebf57966f
Reviewed-on: https://go-review.googlesource.com/129059
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-17 19:22:00 +00:00
Russ Cox
d46587c4ea cmd/go: distinguish patterns from the results of matching them
To date the go command has always just treated the command line
package patterns as a []string, expanded by pattern matching into
another []string. As a result, the code is not always clear about
whether a particular []string contains patterns or results.
A few different important bugs are caused by not keeping
this distinction clear enough. This CL sets us up well for fixing those,
by introducing an explicit search.Match struct holding the
results of matching a single pattern.

The added clarity here also makes it clear how to avoid duplicate
warnings about unmatched packages.

Fixes #26925. (Test in followup CL.)

Change-Id: Ic2f0606f7ab8b3734a40e22d3cb1e6f58d031061
Reviewed-on: https://go-review.googlesource.com/129058
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-17 19:21:57 +00:00
Alan Donovan
08d10f9af1 doc: describe golang.org/x/go/packages in go1.11 release notes
Also, rename an HTML element ID to avoid duplicate.

Fixes golang/go#27038

Change-Id: Icc064a1cc86ddc794fc085d98b4cde3effff8ad0
Reviewed-on: https://go-review.googlesource.com/129635
Reviewed-by: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
2018-08-17 18:38:27 +00:00
Russ Cox
c81d216d84 go/doc: allow interior dot in heading, as in "go.mod"
Only the expected headings are affected.
Diffing the output of "go run headscan.go" before and after:

$ diff head1 head2
26a27,28
> 	Edit go.mod from tools or scripts
> 	Make go.mod semantically consistent
168c170
< 141 headings found
---
> 143 headings found
$

Fixes #26938.

Change-Id: I204fd982a60773aa26880cd19eed890c373b8ab6
Reviewed-on: https://go-review.googlesource.com/129677
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-08-17 17:05:37 +00:00
Russ Cox
3e0f5f934e doc/code: drop mentions of GOPATH/pkg directory
It's already half gone and later will be all gone.
It's not worth explaining in an introduction doc.

Fixes #24506
Updates #4719

Change-Id: Ie48128b3aa090d84e0e734aa45f14a4480292913
Reviewed-on: https://go-review.googlesource.com/129679
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-17 15:52:33 +00:00
Daniel Martí
2482451f76 cmd/vet: don't suggest ... if it breaks a program
It is possible to write a function that seems to wrap a print/printf
call, but then doesn't. For example, if the string parameter we thought
was the format is used as another argument.

One option would be to make vet's print analysis smarter, to detect when
format strings are indeed used like we initially suspected.

However, I've opted for a simpler solution - check if the print/printf
call is already using more than one variadic argument, in which case
using an ellipsis in the last one would break the program:

	// too many arguments in call to fmt.Printf
	fmt.Printf(format, arg0, args...)

Fixes #26979.

Change-Id: I39371f1cec8483cfd2770a91670c1e80cbb9efdf
Reviewed-on: https://go-review.googlesource.com/129575
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2018-08-17 15:51:47 +00:00
Dan Johnson
876c6d1f27 cmd/compile: make duplicate anonymous interface output deterministic
Ranging through a map is non-deterministic and there can be duplicate
entries in the set (with the same name) which don't have identical
definitions in some cases.

Fixes #27013

Change-Id: I378c48bc359c10b25b9238e0c663b498455b19fd
Reviewed-on: https://go-review.googlesource.com/129515
Reviewed-by: Russ Cox <rsc@golang.org>
2018-08-17 15:34:50 +00:00
Russ Cox
751ea9369a cmd/go: document import "C" check from CL 129062
Added this locally but then broke the first rule of Gerrit
and clicked Submit instead of running "git submit".

Change-Id: I83c28d9151c566e9b2092e2613d67731a5d64beb
Reviewed-on: https://go-review.googlesource.com/129678
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2018-08-17 14:56:26 +00:00
Russ Cox
974d5364a6 cmd/go: ignore import "C" files in module loader in non-cgo mode
Obviously, including files that import "C" when cgo is disabled is wrong.
The package load step correctly excludes them and finds no files at all,
which then causes a failure.

Fixes #26927.

Change-Id: I00e6d6450e783d467d20bde99e91240ecb0db837
Reviewed-on: https://go-review.googlesource.com/129062
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: David du Colombier <0intro@gmail.com>
2018-08-17 14:41:26 +00:00
Russ Cox
c265c893de cmd/go: ignore /tmp/go.mod
Two different people have created /tmp/go.mod for experimentation
and then had other tests that create fresh work directories
below /tmp fail unexpectedly because the go command finds
/tmp/go.mod. Refuse to use /tmp/go.mod. /tmp/anything/go.mod is fine.

Fixes #26708.

Change-Id: I2a4f61ea63099cff59fbf9e8798e5dcefefd5557
Reviewed-on: https://go-review.googlesource.com/129063
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-17 14:35:32 +00:00
Brad Fitzpatrick
dea36a6f75 cmd/go: disable TestAccidentalGitCheckout for now
It seems it might not have ever worked.

Updates #22983

Change-Id: Icc022539aa2555486a65900abf97dfa30f92a1ea
Reviewed-on: https://go-review.googlesource.com/129615
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
2018-08-16 18:27:09 +00:00
Keith Randall
a68b713ef6 runtime: load errno as signed 32-bit
the function libc_errno returns a pointer to a signed-32 bit quantity,
not a 64-bit quantity.

Fixes #27004

Change-Id: I0623835ee34fd9655532251f096022a5accb58cd
Reviewed-on: https://go-review.googlesource.com/129475
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-16 15:51:23 +00:00
Alberto Donizetti
6502c11286 cmd/go: fix typos in go help mod subpages
mkalldocs.sh was run and it also picked up a doc change introduced in
CL 128935, where it wasn't run.

Fixes #27030

Change-Id: Ie13fdb71cd7d5481366a02eb711ca48f094026fd
Reviewed-on: https://go-review.googlesource.com/129576
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-16 15:14:35 +00:00
Robert Griesemer
c882f4b6b1 go/printer: consider empty lines in table layout computation
In previous versions of Go including 1.10, an empty line would break the
alignment of elements within an expression list.

golang.org/cl/104755 changed the heuristic, with the side effect that
empty lines no longer broke the table alignment.

A prior fix (https://go-review.googlesource.com/c/go/+/125260, reverted)
introduced another regression (#26930) which this change doesn't produce.

Added test cases for both #26352 and #26930.

Fixes #26352.
Updates #26930.

Change-Id: I371f48e6f3620ebbab53f2128ec5e58bcd4a62f1
Reviewed-on: https://go-review.googlesource.com/129256
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-08-14 20:40:15 +00:00
Martin Möhrmann
469ada6ed9 runtime: go fmt runtime2.go
Change-Id: I29a6125c9ef285fc365c4e11ab158b79224ae333
Reviewed-on: https://go-review.googlesource.com/126602
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-14 16:32:55 +00:00
Robert Griesemer
daeb0b4f53 go/printer: revert "make empty lines break table alignment"
This reverts commit c116265eb3.

The change, while addressing issue #26352, introduced another
regression (#26930), which is worse. Reverting this change in
favor of a better fix for the original issue.

Updates #26352.
Fixes #26930.

Change-Id: I71ad12a8212992cce5c1e73907d1f7460f98d9e8
Reviewed-on: https://go-review.googlesource.com/129255
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-14 15:57:25 +00:00
Richard Musiol
81555cb4f3 cmd/compile/internal/gc: add nil check for closure call on wasm
This commit adds an explicit nil check for closure calls on wasm,
so calling a nil func causes a proper panic instead of crashing on the
WebAssembly level.

Change-Id: I6246844f316677976cdd420618be5664444c25ae
Reviewed-on: https://go-review.googlesource.com/127759
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-08-14 09:19:38 +00:00
Johan Brandhorst
4fc7b93ad7 net/http: support configuring fetch options
The default WASM RoundTripper is implemented using
the browser Fetch API. Some options don't readily map to
existing http.Request options, so we use the precedent
set by the TrailerPrefix constant to allow a user to configure
the "mode" and "credentials" options by supplying them
as headers in the http.Request.

Updates #26769

Change-Id: If42d24418c4ffb17211f57e36708cf460fb4c579
GitHub-Last-Rev: b230502084
GitHub-Pull-Request: golang/go#26784
Reviewed-on: https://go-review.googlesource.com/127718
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-08-13 19:04:16 +00:00
Brad Fitzpatrick
7a6fc1f30b net/http: update request cancelation docs
Fixes #26101

Change-Id: Id4def032b846257d2de992b7561ac90a17e08b91
Reviewed-on: https://go-review.googlesource.com/129155
Reviewed-by: Andrew Bonventre <andybons@golang.org>
2018-08-13 18:28:09 +00:00
Filippo Valsorda
015873c153 doc: update the primary security coordinator to filippo@
Fixes #26876

Change-Id: Ibef4e305bead1432c6a02bc2507f8000c2f4b892
Reviewed-on: https://go-review.googlesource.com/129064
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-13 04:48:19 +00:00
Filippo Valsorda
f1c7faacf0 A+C: second and final round of updates for Go 1.11
Updates #12042

Change-Id: Ia8d2214caad50560c4d46d723f8b94c954059b98
Reviewed-on: https://go-review.googlesource.com/128877
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-12 19:56:28 +00:00
Russ Cox
5c11480631 cmd/go: don't let ... match GOROOT/src/cmd in module mode
GOROOT/src/cmd uses GOROOT/src/cmd/vendor, which module
mode simply cannot handle.

Exposed by making ... match the standard library, which it still should.

But for now it's fine to just exclude commands.

Change-Id: I2201b94445f11239022de8a2473aa3b573f405c0
Reviewed-on: https://go-review.googlesource.com/129055
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-08-10 20:02:31 +00:00
Russ Cox
64205cd4b6 cmd/go: report implicit cgo inputs in go list -compiled
Tools using go list -compiled expect to see an Imports list
that includes all the imports in CompiledGoFiles.
Make sure the list includes the cgo-generated imports.

Fixes #26136.

Change-Id: I6cfe14063f8edfe65a7af37522c7551272115b82
Reviewed-on: https://go-review.googlesource.com/128935
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2018-08-10 18:52:40 +00:00
Russ Cox
e652b7e63f cmd/go: fix module ... pattern to match standard library
The non-module ... pattern always has.

Fixes #26905.

Change-Id: I7b298747fb33b82c58d3e6a6bc6687b6e825e52c
Reviewed-on: https://go-review.googlesource.com/128997
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2018-08-10 18:31:32 +00:00
Russ Cox
12d0a2884a cmd/go: do not try to understand git fetch --depth=1 errors
We used to try a git fetch --depth=1 of a specific hash and
distinguish between an error meaning
"that's not a hash I can give you directly"
(in which case we fall through and pull the whole repo)
and some other error like connection failure, bad ssh key
(in which case we give up).

We've had repeated problems trying to understand the
error meanings so just stop doing that, and fall back to
trying a full fetch on any error at all. If the error really
was some kind of network or auth or i/o problem, then
it will happen the second time and we can report it then.

Fixes #26894.

Change-Id: If1eaaddb87e8bfeff7a3894cce4ecef39802198c
Reviewed-on: https://go-review.googlesource.com/128904
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2018-08-10 18:12:02 +00:00