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Commit Graph

41075 Commits

Author SHA1 Message Date
Matthew Dempsky
115e4c9c14 test: add test coverage for type-switch hash collisions
This CL expands the test for #29612 to check that type switches also
work correctly when type hashes collide.

Change-Id: Ia153743e6ea0736c1a33191acfe4d8ba890be527
Reviewed-on: https://go-review.googlesource.com/c/go/+/195782
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 22:14:49 +00:00
Lucas Bremgartner
c1000c500c encoding/json: validate strings when decoding into Number
Unmarshaling a string into a json.Number should first check that the string is a valid Number.
If not, we should fail without decoding it.

Fixes #14702

Change-Id: I286178e93df74ad63c0a852c3f3489577072cf47
GitHub-Last-Rev: fe69bb68ee
GitHub-Pull-Request: golang/go#34272
Reviewed-on: https://go-review.googlesource.com/c/go/+/195045
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 21:56:53 +00:00
Daniel Martí
0e0bff840e cmd/compiler: skip some go/printer work in rulegen
We use go/format on the final output, so don't bother with the added
tabwriter work to align comments when using go/printer.

	name     old time/op         new time/op         delta
	Rulegen          2.53s ± 2%          2.48s ± 1%  -2.20%  (p=0.032 n=5+5)

	name     old user-time/op    new user-time/op    delta
	Rulegen          11.2s ± 1%          10.8s ± 0%  -3.72%  (p=0.008 n=5+5)

	name     old sys-time/op     new sys-time/op     delta
	Rulegen          218ms ±17%          207ms ±19%    ~     (p=0.548 n=5+5)

	name     old peak-RSS-bytes  new peak-RSS-bytes  delta
	Rulegen          184MB ± 3%          175MB ± 4%    ~     (p=0.056 n=5+5)

Change-Id: I53bad2ab15cace67415f2171fffcd13ed596e62b
Reviewed-on: https://go-review.googlesource.com/c/go/+/195219
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 21:37:16 +00:00
Daniel Martí
357e8f83f8 cmd/compile: parallelize another big chunk of rulegen
rulegen has a sanity check that ensures all the arch-specific opcodes
are handled by each of the gen files.

This is an expensive chunk of work, particularly since there are a lot
of opcodes in total, and each one of them compiles and runs a regular
expression.

Parallelize that for each architecture, which greatly speeds up 'go run
*.go' on my laptop with four real CPU cores.

	name     old time/op         new time/op         delta
	Rulegen          3.39s ± 1%          2.53s ± 2%  -25.34%  (p=0.008 n=5+5)

	name     old user-time/op    new user-time/op    delta
	Rulegen          10.6s ± 1%          11.2s ± 1%   +6.09%  (p=0.008 n=5+5)

	name     old sys-time/op     new sys-time/op     delta
	Rulegen          201ms ± 7%          218ms ±17%     ~     (p=0.548 n=5+5)

	name     old peak-RSS-bytes  new peak-RSS-bytes  delta
	Rulegen          182MB ± 3%          184MB ± 3%     ~     (p=0.690 n=5+5)

Change-Id: Iec538ed0fa7eb867eeeeaab3da1e2615ce32cbb9
Reviewed-on: https://go-review.googlesource.com/c/go/+/195218
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2019-09-16 21:37:11 +00:00
Jay Conrod
4d18a7ceb2 cmd/go: don't split internal test main packages twice
Fixes #34321

Change-Id: Ia6253038c525089e20a1da64a2c5c9dcc57edd74
Reviewed-on: https://go-review.googlesource.com/c/go/+/195677
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-09-16 20:09:44 +00:00
Matthew Dempsky
7f907b9cee cmd/compile: require -lang=go1.14 for overlapping interfaces
Support for overlapping interfaces is a new (proposed) Go language
feature to be supported in Go 1.14, so it shouldn't be supported under
-lang=go1.13 or earlier.

Fixes #34329.

Change-Id: I5fea5716b7d135476980bc40b4f6e8c611b67735
Reviewed-on: https://go-review.googlesource.com/c/go/+/195678
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-16 19:43:54 +00:00
Alberto Donizetti
c2facbe937 Revert "test/codegen: document -all_codegen option in README"
This reverts CL 192101.

Reason for revert: The same paragraph was added 2 weeks ago
(look a few lines above)

Change-Id: I05efb2631d7b4966f66493f178f2a649c715a3cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/195637
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-16 17:31:37 +00:00
Jay Conrod
aa680c0c49 cmd/go: don't include package dir in cache key when -trimpath is set
The '-trimpath' flag tells 'go build' to trim any paths from the
output files that are tied to the current workspace or toolchain. When
this flag is set, we do not need to include the package directory in
the text hashed to construct the action ID for each package.

Fixes #33772

Change-Id: I20b902d2f58019709b15864ca79aa0d9255ae707
Reviewed-on: https://go-review.googlesource.com/c/go/+/195318
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-09-16 16:25:41 +00:00
Matthew Dempsky
606019cb4b cmd/compile: trim function name prefix from escape diagnostics
This information is redundant with the position information already
provided. Also, no other -m diagnostics print out function name.

While here, report parameter leak diagnostics against the parameter
declaration position rather than the function, and use Warnl for
"moved to heap" messages.

Test cases updated programmatically by removing the first word from
every "no match for" error emitted by run.go:

go run run.go |& \
  sed -E -n 's/^(.*):(.*): no match for `([^ ]* (.*))` in:$/\1!\2!\3!\4/p' | \
  while IFS='!' read -r fn line before after; do
    before=$(echo "$before" | sed 's/[.[\*^$()+?{|]/\\&/g')
    after=$(echo "$after" | sed -E 's/(\&|\\)/\\&/g')
    fn=$(find . -name "${fn}" | head -1)
    sed -i -E -e "${line}s/\"${before}\"/\"${after}\"/" "${fn}"
  done

Passes toolstash-check.

Change-Id: I6e02486b1409e4a8dbb2b9b816d22095835426b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/195040
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-16 15:30:51 +00:00
Ian Lance Taylor
4ae25ff140 os/signal: split up sleeps waiting for signal
Try to deflake TestNohup.

The kernel will deliver a signal as a thread returns from a syscall.
If the only active thread is sleeping, and the system is busy,
the kernel may not get around to waking up a thread to catch the signal.
Try splitting up the sleep, to give the kernel another change to deliver.

I don't know if this will help, but it seems worth a try.

Fixes #33174

Change-Id: I34b3240af706501ab8538cb25c4846d1d30d7691
Reviewed-on: https://go-review.googlesource.com/c/go/+/194879
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-09-16 15:19:42 +00:00
Maya Rashish
531f1d50cc syscall: avoid zeroing unused syscall arguments
Zeroing unused registers is not required. Removing it makes the code
very slightly smaller and very slightly faster.

Change-Id: I1ec17b497db971ca8a3641e3e94c063571419f27
GitHub-Last-Rev: f721bb2636
GitHub-Pull-Request: golang/go#31596
Reviewed-on: https://go-review.googlesource.com/c/go/+/173160
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-16 14:18:15 +00:00
Lynn Boger
782228a73f doc: update ppc64 section for asm.html
Update the section in asm.html related to PPC64. Remove the line
that says it is in an experimental state, add a link to the
new doc.go file that has all the detail for the Go assembler for
PPC64.

Change-Id: I45d9891669e01d94e2721be576d572e02cd9d2db
Reviewed-on: https://go-review.googlesource.com/c/go/+/183840
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 14:12:02 +00:00
Lucas Bremgartner
49e7c7672d encoding/json: make Number with the ,string option marshal with quotes
Add quotes when marshaling a json.Number with the string option
set via a struct tag. This ensures that the resulting json
can be unmarshaled into the source struct without error.

Fixes #34268

Change-Id: Ide167d9dec77019554870b5957b37dc258119d81
GitHub-Last-Rev: dde81b7120
GitHub-Pull-Request: golang/go#34269
Reviewed-on: https://go-review.googlesource.com/c/go/+/195043
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 11:56:15 +00:00
Cherry Zhang
d9b8ffa51c test/codegen: document -all_codegen option in README
It is useful to know about the -all_codegen option for running
codegen tests for all platforms. I was puzzling that some codegen
test was not failing on my local machine or on trybot, until I
found this option.

Change-Id: I062cf4d73f6a6c9ebc2258195779d2dab21bc36d
Reviewed-on: https://go-review.googlesource.com/c/go/+/192101
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-16 11:53:57 +00:00
Cuong Manh Le
75da700d0a cmd/compile: consistently use strlit to access constants string values
Passes toolstash-check.

Change-Id: Ieaef20b7649787727b69469f93ffc942022bc079
Reviewed-on: https://go-review.googlesource.com/c/go/+/195198
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-16 11:41:20 +00:00
Austin Clements
142c002ee7 misc/wasm: fix argv/envp layout
The wasm_exec.js wrapper tries to set up the argv and envp following
the UNIX conventions, but doesn't get it quite right, which can cause
runtime.goenv to crash if you get unlucky.

The main problem was that the envp array wasn't terminated with a nil
pointer, so the runtime didn't know when to stop reading the array.
This CL adds that nil pointer to the end of the envp array.

The other problem was harmless, but confusing. In the UNIX convention,
the argv array consists of argc pointers followed by a nil pointer,
followed by the envp array. However, wasm_exec.js put the environment
variable count between the two pointer arrays rather than a nil
pointer. The runtime never looks at this slot, so it didn't matter,
but the break from convention left Cherry and I trying to debug why it
*wasn't* losing any environment variables before we realized that that
layouts happened to be close enough to work. This CL switches to the
UNIX convention of simply terminating the argv array with a nil
pointer.

Change-Id: Ic9a4cd9eabb5dfa599a809b960f9e579b9f1f4db
Reviewed-on: https://go-review.googlesource.com/c/go/+/193417
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Richard Musiol <neelance@gmail.com>
2019-09-15 23:53:48 +00:00
Ben Shi
d12c62d12d go/parser: fix ignored errors in ParseExprFrom
This CL fixes a bug in ParseExprFrom which makes
error messages ignored when there are 10+ errors
in a single expression.

fixes #34241
fixes #34274

Change-Id: I29a82d3e3e726279005eb6fbcd7ee3aebffaa679
Reviewed-on: https://go-review.googlesource.com/c/go/+/194638
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-15 00:18:30 +00:00
Nigel Tao
4e215554aa compress/lzw: clarify code invariants
This follows on from https://go-review.googlesource.com/c/go/+/191358
which was submitted as a comment-only change.

Benchmarks don't show any significant change:

compress/lzw
name            old speed      new speed      delta
Decoder/1e4-56  92.8MB/s ± 1%  92.7MB/s ± 1%   ~     (p=1.000 n=5+5)
Decoder/1e5-56   100MB/s ± 1%   100MB/s ± 1%   ~     (p=0.746 n=5+5)
Decoder/1e6-56   101MB/s ± 1%   101MB/s ± 1%   ~     (p=0.381 n=5+5)

image/gif
name                old speed      new speed      delta
Decode-56           63.2MB/s ± 1%  63.2MB/s ± 1%   ~     (p=0.690 n=5+5)

Change-Id: Ic36b5410cb06ca258da32e40da1f1ff6c44cff86
Reviewed-on: https://go-review.googlesource.com/c/go/+/194938
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-14 02:23:31 +00:00
Tim Cooper
8cc57c0ccc log: add Lmsgprefix flag
The Lmsgprefix flag moves the logger's prefix from the
beginning of the line to after the log header. For example,
a logger with the prefix "LOG " and LstdFlags would output:

    LOG 2009/11/10 23:00:00 entry text

Adding the Lmsgprefix flag would output:

    2009/11/10 23:00:00 LOG entry text

Fixes #32062

Change-Id: I9f7c9739abeb53c424112aaeed33444eeefdfbbc
Reviewed-on: https://go-review.googlesource.com/c/go/+/186182
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2019-09-13 23:21:54 +00:00
Jay Conrod
24781a1faf cmd/go: fix link error for -coverpkg in GOPATH mode
If a generated test main package transitively depends on a main
package, the main package will now always be rebuilt as a library and
will not be compiled with '-p main'.

This expands the fix for #30907, which only applied to packages with
the BuildInfo set (main packages built in module mode). Linking
multiple packages with BuildInfo caused link errors, but it appears
these errors apply to some symbols in GOPATH mode.

Fixes #34114

Change-Id: Ic1e53437942269a950dd7e45d163707922c92edd
Reviewed-on: https://go-review.googlesource.com/c/go/+/195279
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-13 16:25:00 +00:00
Joel Sing
79877e5f91 cmd/link: simplify determineLinkMode
Simplify determineLinkMode by calling mustLinkExternal upfront,
then doing a first pass for LinkModeAuto, followed by a second pass
that determines if the link mode is valid.

Change-Id: I9d7668107c159f8fe330b8c05fee035bbe9875fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/195078
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-13 09:40:36 +00:00
Ruixin Bao
98aa97806b cmd/compile: add math/bits.Mul64 intrinsic on s390x
This change adds an intrinsic for Mul64 on s390x. To achieve that,
a new assembly instruction, MLGR, is introduced in s390x/asmz.go. This assembly
instruction directly uses an existing instruction on Z and supports multiplication
of two 64 bit unsigned integer and stores the result in two separate registers.

In this case, we require the multiplcand to be stored in register R3 and
the output result (the high and low 64 bit of the product) to be stored in
R2 and R3 respectively.

A test case is also added.

Benchmark:
name      old time/op  new time/op  delta
Mul-18    11.1ns ± 0%   1.4ns ± 0%  -87.39%  (p=0.002 n=8+10)
Mul32-18  2.07ns ± 0%  2.07ns ± 0%     ~     (all equal)
Mul64-18  11.1ns ± 1%   1.4ns ± 0%  -87.42%  (p=0.000 n=10+10)

Change-Id: Ieca6ad1f61fff9a48a31d50bbd3f3c6d9e6675c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/194572
Reviewed-by: Michael Munday <mike.munday@ibm.com>
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-13 09:04:48 +00:00
Cherry Zhang
03f63654c4 Revert "cmd/link: prefix syms with "_" on external darwin links"
This reverts CL 194381

Reason for revert: break tests like add2line.

Change-Id: I9e858c7ada340a842bd0cad719616ad30fae4aaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/195137
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-12 21:02:57 +00:00
Joel Sing
6c6ad3086e cmd/asm,cmd/internal/obj: initial support for riscv64 assembler
Provide the initial framework for the riscv64 assembler. For now this
only supports raw WORD instructions, but at least allows for basic
testing. Additional functionality will be added in separate changes.

Based on the riscv-go port.

Updates #27532

Change-Id: I181ffb2d37a34764a3e91eded177d13a89c69f9a
Reviewed-on: https://go-review.googlesource.com/c/go/+/194117
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-12 18:54:38 +00:00
Jay Conrod
9428861378 cmd/go: document <module>/@latest endpoint in 'go help goproxy'
Updates #32789

Change-Id: Ie5e8e3b7b6a923aa9068c8af3ac8f081bd92c830
Reviewed-on: https://go-review.googlesource.com/c/go/+/190838
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-12 18:47:09 +00:00
Jeremy Faller
2959ba1f55 cmd/link: prefix syms with "_" on external darwin links
Fixes #33808

Change-Id: If1f30bc80004093ffdf9121768464dfb3a6e1f63
Reviewed-on: https://go-review.googlesource.com/c/go/+/194381
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-12 18:44:26 +00:00
Bryan C. Mills
1dd7164555 cmd/go/internal/work: include detail in errors from cache operations
Since the cache has been required since Go 1.12, also remove redundant
checks for a nil cache.

Updates #29127
Updates #29667

Change-Id: Ibc59b659306a4eef2d4f0e3d0b651986d6cf84ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/188021
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-12 18:33:05 +00:00
Cuong Manh Le
48e482ef0c cmd/compile: do not mark export for send only chan
No changes in compilebench, pass toolstash-check.

Change-Id: I2688f7b45af0eaa0cf3b38e726bce6e68c20f69c
Reviewed-on: https://go-review.googlesource.com/c/go/+/195077
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-12 17:41:57 +00:00
Bryan C. Mills
a9fdd6bba2 doc/go1.14: start doc; note end of NaCl platform support
This skeleton follows the model of CL 174521,
with additions from 'relnote -html'.

Updates #33738
Updates #30439

Change-Id: I0f88ff7f231b7728dca0695143f2f2eda74d60c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/195058
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-12 16:15:01 +00:00
Alberto Donizetti
77aea69176 doc/gccgo: update gcc status, remove double spaces
This change updates the status of gccgo 8 and gccgo 9, which are now
released.

It also replaces every instance of two-spaces with one space in text
paragraphs, which is the preferred style in Go documentation.

Fixes #34167

Change-Id: I94a4d85c06281f2623d39a68db7b6c95b5867999
Reviewed-on: https://go-review.googlesource.com/c/go/+/193842
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-12 16:09:18 +00:00
Tom Thorogood
9cce08d724 cmd/go/internal/renameio,runtime: avoid leaking temp directory in test
TestWriteFileModeAppliesUmask and TestVectoredHandlerDontCrashOnLibrary
could both leak /tmp/go-build-* directories which isn't very friendly.

Change-Id: Ibee9c33d49ad48958fae4df73853b82d92314bf0
GitHub-Last-Rev: 814e2fa4bb
GitHub-Pull-Request: golang/go#34253
Reviewed-on: https://go-review.googlesource.com/c/go/+/194880
Run-TryBot: Agniva De Sarker <agniva.quicksilver@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-12 15:52:35 +00:00
Ruixin Bao
90e0b40ab2 cmd/internal/obj/s390x: use 12 bit load and store instruction when possible on s390x
Originally, we default to use load and store instruction with 20 bit displacement.
However, that is not necessary. Some instructions have a displacement smaller
than 12 bit. This CL allows the usage of 12 bit load and store instruction when
that happens.

This change also reduces the size of .text section in go binary by 19 KB.

Some tests are also added to verify the functionality of the change.

Change-Id: I13edea06ca653d4b9ffeaefe8d010bc2f065c2ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/194857
Reviewed-by: Michael Munday <mike.munday@ibm.com>
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-12 15:49:54 +00:00
Bryan C. Mills
c20eb96e6b cmd/go/internal/modload: add an Unwrap method on ImportMissingError
Jay suggested this in CL 189780, and it seems semantically correct.

As far as I can tell this has no impact one way or the other right
now, but might prevent confusion (or at least give us more experience
with error handling!) in future changes.

Updates #30748
Updates #28459
Updates #30322

Change-Id: I5d7e9a08ea141628ed6a8fd03c62d0d3c2edf2bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/194817
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-12 14:09:30 +00:00
Bryan C. Mills
9a44023ce9 cmd/go/internal/web: include snippets of plain-text server responses in error detail
For the server response to be displayed, the response must be served
as type text/plain with charset us-ascii or utf-8, and must consist of
only graphic characters and whitespace.

We truncate the server response at the first blank line or after 8
lines or a fixed number of characters, and tab-indent (if multiple
lines) to ensure that the response is offset from ordinary go command
output.

Fixes #30748

Change-Id: I0bc1d734737e456e3251aee2252463b6355e8c97
Reviewed-on: https://go-review.googlesource.com/c/go/+/189783
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-12 14:09:20 +00:00
Bryan C. Mills
54b7afb4ef cmd/go/internal/modfetch: reduce path redundancy in checkMod error reporting
Updates #30748

Change-Id: I38a6cdc9c9b488fec579e6362a4284e26e0f526e
Reviewed-on: https://go-review.googlesource.com/c/go/+/189782
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-12 14:08:25 +00:00
Bryan C. Mills
3d522b1088 cmd/go/internal/module: in VersionError, do not wrap an existing ModuleError
VersionError wraps the given error in a ModuleError struct.

If the given error is already a ModuleError for the same path and
version, we now return it directly instead of wrapping.
This makes it safer to call VersionError if we don't know whether
a given error is already wrapped.

Updates #30748

Change-Id: I41b23f6c3ead0ec382e848696da51f478da1ad35
Reviewed-on: https://go-review.googlesource.com/c/go/+/189781
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-12 14:08:16 +00:00
Daniel Martí
1581bb9843 cmd/compile: stop using go/types in rulegen
Using go/types to get rid of all unused variables in CL 189798 was a
neat idea, but it was pretty expensive. go/types is a full typechecker,
which does a lot more work than we actually need. Moreover, we had to
run it multiple times, to catch variables that became unused after
removing existing unused variables.

Instead, write our own little detector for unused imports and variables.
It doesn't use ast.Walk, as we need to know what fields we're
inspecting. For example, in "foo := bar", "foo" is declared, and "bar"
is used, yet they both appear as simple *ast.Ident cases under ast.Walk.

The code is documented to explain how unused variables are detected in a
single syntax tree pass. Since this happens after we've generated a
complete go/ast.File, we don't need to worry about our own simplified
node types.

The generated code is the same, but rulegen is much faster and uses less
memory at its peak, so it should scale better with time.

With 'benchcmd Rulegen go run *.go' on perflock, we get:

	name     old time/op         new time/op         delta
	Rulegen          4.00s ± 0%          3.41s ± 1%  -14.70%  (p=0.008 n=5+5)

	name     old user-time/op    new user-time/op    delta
	Rulegen          14.1s ± 1%          10.6s ± 1%  -24.62%  (p=0.008 n=5+5)

	name     old sys-time/op     new sys-time/op     delta
	Rulegen          318ms ±26%          263ms ± 9%     ~     (p=0.056 n=5+5)

	name     old peak-RSS-bytes  new peak-RSS-bytes  delta
	Rulegen          231MB ± 4%          181MB ± 3%  -21.69%  (p=0.008 n=5+5)

Change-Id: I8387d52818f6131357868ad348dac8c96d926191
Reviewed-on: https://go-review.googlesource.com/c/go/+/191782
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2019-09-12 10:48:58 +00:00
Nigel Tao
396d625330 compress/lzw: fix comment re high-code invariant
The listed invariant, while technically true, was misleading, and the
invariant can be tightened. We never actually get to (d.hi ==
d.overflow), due to the "d.hi--" line in the decoder.decode method.

This is a comment-only commit, changing the comment to match the code.

A follow-up commit could restore the comment, changing the code to match
the original intented invariant. But the first step is to have the
comment and the code say the same thing.

Change-Id: Ifc9f78d5060454fc107af9be298026bf3043d400
Reviewed-on: https://go-review.googlesource.com/c/go/+/191358
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-12 07:45:53 +00:00
Cuong Manh Le
3f0437e175 cmd/compile: generalize isfat to handle 1-field structs and 1-element arrays
After CL 192979, it is safe now to optimize isfat slightly to handle
1-field structs and 1-element arrays.

Change-Id: Ie3bc30299abbcef36eee7a0681997cc2f88ed6a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/192980
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-12 06:48:02 +00:00
Cuong Manh Le
55c0ad4b62 cmd/compile: allow iota inside function in a ConstSpec
Fixes #22344

Change-Id: I7c400d9d4ebcab279d08a8c190508d82cbd20899
Reviewed-on: https://go-review.googlesource.com/c/go/+/194717
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-12 06:46:57 +00:00
Cuong Manh Le
88076ebc92 go/types: fix iota undefined after ConstDecl inside function in ConstSpec
When reaching const declaration, Checker override context iota to use
correct iota value, but does not restore the old value when exit, and
always set context iota to nil. It ends up with undefined iota after
const declaration.

To fix it, preserve the original iota value and restore it after const
declaration.

Fixes #34228

Change-Id: I42d5efb55a57e5ddc369bb72d31f1f039c92361c
Reviewed-on: https://go-review.googlesource.com/c/go/+/194737
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-12 04:15:00 +00:00
Matthew Dempsky
0b739fd4df cmd/compile: move duplicate type-case checking into typecheck
Part of the general trend of moving yyerror calls out of walk and into
typecheck.

Notably, this requires splitting test/typeswitch2.go into two files,
because now some of the errors are reported during typecheck and
others are still reported during walk; and if there were any errors
during typecheck, then cmd/compile exits without invoking walk.

Passes toolstash-check.

Change-Id: I05ee0c00b99af659ee1eef098d342d0d736cf31e
Reviewed-on: https://go-review.googlesource.com/c/go/+/194659
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-11 23:33:11 +00:00
Matthew Dempsky
e7e2b1c2b9 cmd/compile: separate type and expression switch typechecking
While superficially type and expression switch handling seem similar
and that it would be worthwhile to unify typechecking them, it turns
out they're actually different enough that separately handling them is
fewer lines of code and easier to understand as well.

Passes toolstash-check.

Change-Id: I357d6912dd580639b6001bccdb2e227ed83c6fe9
Reviewed-on: https://go-review.googlesource.com/c/go/+/194566
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-11 23:01:45 +00:00
Bryan C. Mills
28287552bc Revert "cmd/go/internal/modconv: use modules to examine instead of using only direct source control entries"
This reverts CL 191218.

Reason for revert: broke cmd/go/internal/modconv in the 'linux-amd64-longtest' builder.
(https://build.golang.org/log/e28011d0f918d4b4c503ab47e479d9e76c769abd)

Change-Id: I0d260b0a5ad510d3d304c8aac8286fcab921d2fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/194797
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
2019-09-11 21:10:45 +00:00
Dominik Honnef
d5df4d61ce cmd/gofmt: don't turn nil slices into empty slices during rewriting
The go/ast package uses and guarantees nil slices for optional
elements that weren't present in the parsed source code, such as the
list of return values of a function. Packages using go/ast rely on
this attribute and check for nils explicitly.

One such package is go/printer. In the presence of empty slices
instead of nil slices, it generates invalid code, such as "case :"
instead of "default:". The issues that this CL fixes are all
manifestations of that problem, each for a different syntactic
element.

Fixes #33103
Fixes #33104
Fixes #33105

Change-Id: I219f95a7da820eaf697a4ee227d458ab6e4a80bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/187917
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-11 20:34:54 +00:00
Jay Conrod
8875fb97c5 cmd/go: strip trailing slash from versioned arguments
'go get' accepts arguments of the form path@version, and it passes
them through search.CleanPatterns before querying proxies. With this
change, CleanPatterns preserves text after '@' and will strip trailing
slashes from the patn.

Previously, we did not strip trailing slashes when a version was
present, which caused proxy base URL validation to fail. Module paths
that end with ".go" (for example, github.com/nats-io/nats.go) use
trailing slashes to prevent 'go build' and other commands from
interpreting packages as source file names, so this caused unnecessary
problems for them.

Updates #32483

Change-Id: Id3730c52089e52f1cac446617c20132a3021a808
Reviewed-on: https://go-review.googlesource.com/c/go/+/194600
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-09-11 20:19:25 +00:00
Aofei Sheng
04867cd891 cmd/go/internal/modconv: use modules to examine instead of using only direct source control entries
Since modules now support parsing multiple forms of versions (including
commit hash and source control tag), I think modconv.ConvertLegacyConfig
no longer needs modfetch.ImportRepoRev. So I suggest that we use modules
to convert legacy config instead of using VCS directly. By doing this,
we can make the module proxy participate in the conversion process and
benefit from it (such as speeding up "go mod init" or breaking through
the firewall).

And since modconv.ConvertLegacyConfig is the only caller of
modfetch.ImportRepoRev, I think modfetch.ImportRepoRev can be removed.

Fixes #33767

Change-Id: Ic79b14fa805ed297ca1735a8498cfed2a5ddeec2
Reviewed-on: https://go-review.googlesource.com/c/go/+/191218
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-09-11 19:02:10 +00:00
William Poussier
cc39d8087b encoding/json: encode nil encoding.TextMarshaler instance as "null"
Fixes #34235.

Change-Id: Ia3795fd18860530fa6a4b171545f525e784ffdcb
GitHub-Last-Rev: 1a319c4528
GitHub-Pull-Request: golang/go#34238
Reviewed-on: https://go-review.googlesource.com/c/go/+/194642
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-11 18:37:43 +00:00
Joel Sing
85c60bd0f3 cmd/internal/obj/riscv: fix up instruction groupings
Some of the instructions were incorrectly grouped - untangle this and
separate the RV64I instructions, which are under separate sections of
the RISC-V specification.

Change-Id: I232962ab4054bf0b4745887506f51e74ea73f73d
Reviewed-on: https://go-review.googlesource.com/c/go/+/194238
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-11 16:48:56 +00:00
Bryan C. Mills
6f1667ea3e cmd/go/internal/modload: propagate errors from Query for missing imports
Updates #30748
Updates #28459

Change-Id: I1c34b3dae0bf9361dba0dae66bb868901ecafe29
Reviewed-on: https://go-review.googlesource.com/c/go/+/189780
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2019-09-11 16:28:37 +00:00