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Commit Graph

32737 Commits

Author SHA1 Message Date
Albert Nigmatzianov
4cf19fb5a7 log: Prevent getting time if it's unnecessary
Small performance gain:
name              old time/op    new time/op    delta
Itoa-4              95.4ns ± 4%    95.6ns ± 3%    ~     (p=0.256 n=45+46)
Println-4            480ns ± 4%     476ns ± 5%  -0.87%  (p=0.003 n=45+45)
PrintlnNoFlags-4     316ns ± 3%     299ns ± 4%  -5.38%  (p=0.000 n=42+44)

name              old alloc/op   new alloc/op   delta
Itoa-4               0.00B          0.00B         ~     (all equal)
Println-4            21.0B ± 0%     21.0B ± 0%    ~     (all equal)
PrintlnNoFlags-4     21.0B ± 0%     21.0B ± 0%    ~     (all equal)

name              old allocs/op  new allocs/op  delta
Itoa-4                0.00           0.00         ~     (all equal)
Println-4             2.00 ± 0%      2.00 ± 0%    ~     (all equal)
PrintlnNoFlags-4      2.00 ± 0%      2.00 ± 0%    ~     (all equal)

Change-Id: Idcd03609a5a437a69ffa7004a673bf0b8d22e7ad
Reviewed-on: https://go-review.googlesource.com/38056
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-22 21:59:34 +00:00
Dhananjay Nakrani
d433de6e86 cmd/go: warn on -race with -covermode=set.
Fixes #20435.

Change-Id: I15576f36b26d01642c1187325baea82d3077e578
Reviewed-on: https://go-review.googlesource.com/43777
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-22 19:59:28 +00:00
Steven Hartland
f6f1daa4b8 cmd/go: Document that -cover causes incorrect line numbers
Due to the fact that -cover injects additional code to the original
source, tests run with -cover will often have incorrect line numbers.

Also includes docs for -list regexp missed by ba8ff87

Updates #6329

Change-Id: I87f0618ac31e96071bca61055cc17c0cbdee208a
Reviewed-on: https://go-review.googlesource.com/38640
Reviewed-by: Rob Pike <r@golang.org>
2017-05-22 19:31:43 +00:00
Volker Dobler
c5e8ec5b6d net/http/cookiejar: increase test coverage
The jarKey function handles broken PublicSuffixList implementations but
no test verified it.

Change-Id: Ifb76de9e8c3941f3b08d3e43970056e023013457
Reviewed-on: https://go-review.googlesource.com/38357
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-22 19:29:49 +00:00
Robert Griesemer
d79bb78a71 cmd/compile: report correct position in redeclaration errors
When restoring syms, we must also restore the original Lastlineno.
Bug introduced with https://golang.org/cl/41390/.

Fixes #20415.

Change-Id: Ie81d36279d717e330951b52f42dcee4b0025b9f0
Reviewed-on: https://go-review.googlesource.com/43811
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-05-22 19:20:11 +00:00
Volker Dobler
8f6d68ebaa net/http: send more cookie values in double quotes
According to RFC 6255 a cookie value may contain neither spaces " "
nor commas ",". But browsers seem to handle these pretty well and such
values are not uncommon in the wild so we do allow spaces and commas
in cookie values too. Up to now we use the double-quoted wire format
only for cookie values with leading and/or trailing spaces and commas.
Values with internal spaces/commas are sent without the optional double
quotes. This seems to be a problem for some agents.

This CL changes the behaviour for cookie values with spaces or commas:
Such values are always sent in double quotes. This should not have
any impact on existing agents and the increases of data transmitted
is negligible.

Fixes #18627

Change-Id: I575a98d589e048aa39d976a3c984550daaca730a
Reviewed-on: https://go-review.googlesource.com/37328
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-22 19:13:51 +00:00
Tristan Colgate
1611839b29 net/http/httputil: ReverseProxy should pass on unannounced Trailers
Trailers that are not announced in the Trailer must be passed on to
the downstream client.

Rather than iterate over each and find missing trailer values,
this re-adds all trailers to the headers if there is a disparity
between the number of announced trailers and the final number.

This fixes #20437

Change-Id: I867e85f45feff68616a9a9bd6f65f12d73825eb7
Reviewed-on: https://go-review.googlesource.com/43712
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-22 18:34:09 +00:00
Alberto Donizetti
bc495c5751 doc: mention that go tools is needed to access some tool
Change-Id: I020cd3d10a441ba4047800fdf4f93433c458398a
Reviewed-on: https://go-review.googlesource.com/43717
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-22 15:51:19 +00:00
Daniel Theophanes
1865a56e8d database/sql: allow Stmt Query and Exec methods to open a new conn
Query and Exec functions on DB first attempt to get a cached
connection before requesting the connection pool to ignore
the cache and get a new connection. This change aligns Stmt to
that behavior as well.

Fixes #20433

Change-Id: Idda5f61927289d7ad0882effa3a50ffc9efd88e6
Reviewed-on: https://go-review.googlesource.com/43790
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-22 15:02:35 +00:00
Steven Hartland
d79ec64fe1 mime/multipart: Allow ReadForm to process large non-file parts
Allow the memory limit passed into ReadForm to be used as the
memory limit for processing non-file form data as well as file
form data, rather than the existing behaviour of the memory limit
only applying to the file parts and the non-file parts being
arbitrarily limited to 10MB.

This ensures backwards compatibility while still providing the
user with control over the amount of non-file data that can be
processed instead of enforcing an arbitrary 10MB limit.

Change-Id: I53c09eae00147d3ff2d6bdfd4e50949267932c3d
Reviewed-on: https://go-review.googlesource.com/38195
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-22 14:54:00 +00:00
Emmanuel Odeke
6a6c792eef net/http: make ServeMux preserve query string during redirects
Ensure that the implicitly created redirect
for
  "/route"
after
  "/route/"
has been registered doesn't lose the query string information.

Fixes #17841.

Change-Id: Ib7df9242fab8c9368a18fc0da678003d6bec63b8
Reviewed-on: https://go-review.googlesource.com/43779
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-22 14:49:43 +00:00
Ben Shi
5e79787935 cmd/internal/obj/arm: report invalid .S/.P/.W suffix in ARM instructions
Many instructions can not have a .S suffix, such as MULS, SWI, CLZ,
CMP, STREX and others. And so do .P and .W suffixes. Even wrong
assembly code is generated for some instructions with invalid
suffixes.

This patch tries to simplify .S/.W/.P checks. And a wrong assembly
test for arm is added.

fixes #20377

Change-Id: Iba1c99d9e6b7b16a749b4d93ca2102e17c5822fe
Reviewed-on: https://go-review.googlesource.com/43561
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-05-22 13:44:12 +00:00
Rob Phoenix
4bf6c566d3 net: add examples for ParseIP, IP.DefaultMask & IP.Mask
Further examples to support the net package.

Updates #5757

Change-Id: I9b65521d211f6c404b9103c1eaf22b0772eb242e
Reviewed-on: https://go-review.googlesource.com/43711
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
2017-05-22 09:35:42 +00:00
Mikio Hara
2d20ded584 net: add test for RawConn.Control on Windows
This is a followup to https://go-review.googlesource.com/37039.

Updates #19435.

Change-Id: Ia795bd5158d26effa56e897698208ccf73f9e0d2
Reviewed-on: https://go-review.googlesource.com/43693
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-20 00:45:56 +00:00
Mikio Hara
fd25fe60fa internal/poll: implement RawControl of FD on Windows
This is a followup to https://go-review.googlesource.com/37038.

Updates #19435.

Change-Id: If3d56bca0e8816d1a169f5cf97f27b20695a9955
Reviewed-on: https://go-review.googlesource.com/43692
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-20 00:45:11 +00:00
Brad Fitzpatrick
15aa04d200 doc: remove mentions of yacc tool
It was removed in CL 27325.

Fixes #20431

Change-Id: I6842851444186e19029d040f61fdf4f87a3103a6
Reviewed-on: https://go-review.googlesource.com/43771
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-19 20:15:10 +00:00
Kevin Burke
b3b9b5e463 net/url: add examples for URL.Hostname and URL.RequestURI
Change-Id: I72a10cd5dfb863f8219bb3b5b8280c017f523cf4
Reviewed-on: https://go-review.googlesource.com/42856
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-19 19:01:49 +00:00
Daniel Martí
495f55d27d cmd/compile: make duplicate expr cases readable
Instead of just printing the value, print the original node to make the
error more human-friendly. Also print the value if its string form is
different than the original node, to make sure it's obvious what value
was duplicated.

This means that "case '@', '@':", which used to print:

	duplicate case 64 in switch

Will now print:

	duplicate case '@' (value 64) in switch

Factor this logic out into its own function to reuse it in range cases
and any other place where we might want to print a node and its value in
the future.

Also needed to split the errorcheck files because expression switch case
duplicates are now detected earlier, so they stop the compiler before it
gets to generating the AST and detecting the type switch case
duplicates.

Fixes #20112.

Change-Id: I9009b50dec0d0e705e5de9c9ccb08f1dce8a5a99
Reviewed-on: https://go-review.googlesource.com/41852
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-05-19 18:11:51 +00:00
Austin Clements
4dcba023c6 runtime: use pselect6 for usleep on linux/amd64 and linux/arm
Android O black-lists the select system call because its libc, Bionic,
does not use this system call. Replace our use of select with pselect6
(which is allowed) on the platforms that support targeting Android.
linux/arm64 already uses pselect6 because there is no select on arm64,
so only linux/amd64 and linux/arm need changing. pselect6 has been
available since Linux 2.6.16, which is before Go's minimum
requirement.

Fixes #20409.

Change-Id: Ic526b5b259a9e01d2f145a1f4d2e76e8c49ce809
Reviewed-on: https://go-review.googlesource.com/43641
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-19 16:05:39 +00:00
Mikio Hara
366bb678aa net: make {TCP,UDP,IP,Unix}Conn compliant of syscall.Conn interface
This change makes {TCP,UDP,IP,Unix}Conn types compliant of
syscall.Conn interface and adds type rawConn as an implementation of
syscall.RawConn interface.

By this change, the long-standing issues regarding unsupported socket
options and system calls can be solved partly and the broken x/net
packages due to https://go-review.googlesource.com/36799 can be
repaired.

Fixes #3661.
Updates #9661.
Updates #19051.
Updates #19435.

Change-Id: Ic996b040418b54f6d043bc70591789d5a5b23270
Reviewed-on: https://go-review.googlesource.com/37039
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-19 09:10:27 +00:00
Mikio Hara
0a09c72c2e internal/poll: add RawControl, RawRead and RawWrite methods to FD
This change adds RawControl, RawRead and RawWrite methods to type FD
to make the runtime-integrated network poller work together with a
user-defined function. The methods are used via the net package from
external packages and type FD is considered as an implementation of
syscall.Conn and syscall.RawConn interfaces.

Updates #19435.

Change-Id: I4ad04b10ffddb2b54fa8d70587440960d73c0a2d
Reviewed-on: https://go-review.googlesource.com/37038
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-19 09:10:16 +00:00
Mikio Hara
de5c573baa syscall: add Conn and RawConn interfaces
This change adds Conn and RawConn interfaces which can be used to
manipulate raw network connection end points typically represented as
socket descriptors.

Fixes #19435.

Change-Id: Ide2d28eeab91bfd27473ab47a87bec69950b64c9
Reviewed-on: https://go-review.googlesource.com/37913
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-05-19 09:10:04 +00:00
Alex Brainman
64f064cac6 net: make syscall name consistent with others
Change-Id: Ic6d2de92e1f533a9f9a0cd6d7dab463bdafb0e11
Reviewed-on: https://go-review.googlesource.com/43691
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
2017-05-19 07:15:06 +00:00
Alex Brainman
e309dd938f internal/poll: remove unused ioSrv.ExecIO parameter
Change-Id: If5cb80c3c086684ce6c2e8ed9bb23b2a20c8aacd
Reviewed-on: https://go-review.googlesource.com/43690
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-19 07:14:25 +00:00
Alex Brainman
6144c7270e os: make windows Stat as fast as Lstat for files and directories
Recent CL 41834 made windows Stat work for all symlinks.
But CL 41834 also made Stat slow.

John Starks sugested
(see https://github.com/golang/go/issues/19922#issuecomment-300031421)
to use GetFileAttributesEx for files and directories instead.
This makes Stat as fast as at go1.9.

I see these improvements on my Windows 7

name       old time/op  new time/op  delta
StatDot    26.5µs ± 1%  20.6µs ± 2%  -22.37%  (p=0.000 n=9+10)
StatFile   22.8µs ± 2%   6.2µs ± 1%  -72.69%  (p=0.000 n=10+10)
StatDir    21.0µs ± 2%   6.1µs ± 3%  -71.12%  (p=0.000 n=10+9)
LstatDot   20.1µs ± 1%  20.7µs ± 6%   +3.37%  (p=0.000 n=9+10)
LstatFile  6.23µs ± 1%  6.36µs ± 8%     ~     (p=0.587 n=9+10)
LstatDir   6.10µs ± 0%  6.14µs ± 4%     ~     (p=0.590 n=9+10)

and on my Windows XP

name         old time/op  new time/op  delta
StatDot-2    20.6µs ± 0%  10.8µs ± 0%  -47.44%  (p=0.000 n=10+10)
StatFile-2   20.2µs ± 0%   7.9µs ± 0%  -60.91%  (p=0.000 n=8+10)
StatDir-2    19.3µs ± 0%   7.6µs ± 0%  -60.51%  (p=0.000 n=10+9)
LstatDot-2   10.8µs ± 0%  10.8µs ± 0%   -0.48%  (p=0.000 n=10+8)
LstatFile-2  7.83µs ± 0%  7.83µs ± 0%     ~     (p=0.844 n=10+8)
LstatDir-2   7.59µs ± 0%  7.56µs ± 0%   -0.46%  (p=0.000 n=10+10)

Updates #19922

Change-Id: Ice1fb5825defb05c79bab4dec0692e0fd1bcfcd5
Reviewed-on: https://go-review.googlesource.com/43071
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-19 05:55:01 +00:00
Kevin Burke
7f6ce5168d cmd/compile/internal/ssa: fix spelling mistake
Change-Id: I4b8f1b61c10f60ddb3687759af0be1641c1f78ce
Reviewed-on: https://go-review.googlesource.com/43111
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2017-05-19 05:03:37 +00:00
David du Colombier
9fdf77c373 cmd/compile: skip TestScopeRanges on Plan 9
TestScopeRanges has been added in CL 40095. This
test is failing on Plan 9 because executables don't
have a DWARF symbol table.

Fixes #20418.

Change-Id: I6dd3baa636998134ccd042203c8b5c3199a4d6e1
Reviewed-on: https://go-review.googlesource.com/43670
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-05-19 00:29:20 +00:00
Brad Fitzpatrick
ca598e3cd4 os: add some comments and remove an unused variable in rename func
This slightly clarifies the just-submitted CL 40577.

Updates #19647

Change-Id: I5584ad0e1abbc31796e3e5752351857f2a13d6d7
Reviewed-on: https://go-review.googlesource.com/43625
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-18 23:43:24 +00:00
Alessandro Arzilli
2ad41a3090 cmd/compile: output DWARF lexical blocks for local variables
Change compiler and linker to emit DWARF lexical blocks in .debug_info
section when compiling with -N -l.

Version of debug_info is updated from DWARF v2 to DWARF v3 since
version 2 does not allow lexical blocks with discontinuous PC ranges.

Remaining open problems:
- scope information is removed from inlined functions
- variables records do not have DW_AT_start_scope attributes so a
variable will shadow other variables with the same name as soon as its
containing scope begins, even before its declaration.

Updates #6913.
Updates #12899.

Change-Id: Idc6808788512ea20e7e45bcf782453acb416fb49
Reviewed-on: https://go-review.googlesource.com/40095
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2017-05-18 23:10:50 +00:00
Alexander Menzhinsky
0f0a51f1d1 os: lstat oldname before renaming
Fixes #19647

Change-Id: Ife4f98cf2c55ee9490843797213dae2f2647b0a3
Reviewed-on: https://go-review.googlesource.com/40577
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-18 22:40:35 +00:00
Mark Ryan
1ea796ee69 encoding/base32: ensure base32 decoder propagates errors correctly
A number of issues in decoder.Read and newlineFilteringReader.Read were
preventing errors from the reader supplying the encoded data from being
propagated to the caller.  Fixing these issues revealed some additional
problems in which valid decoded data was not always returned to the user
when errors were actually propagated.

This commit fixes both the error propagation and the lost decoded data
problems.  It also adds some new unit tests to ensure errors are handled
correctly by decoder.Read.  The new unit tests increase the test coverage
of this package from 96.2% to 97.9%.

Fixes #20044

Change-Id: I1a8632da20135906e2d191c2a8825b10e7ecc4c5
Reviewed-on: https://go-review.googlesource.com/42094
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-18 22:37:49 +00:00
Josh Bleecher Snyder
26a852112d test: gofmt chan/*.go
These are functional tests, so it is safe to gofmt them.

Change-Id: I3067279c1d49809ac6a62054448ab8a6c3de9bda
Reviewed-on: https://go-review.googlesource.com/43623
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-18 22:35:07 +00:00
Daniel Theophanes
a9bf3b2e19 database/sql: allow drivers to support custom arg types
Previously all arguments were passed through driver.IsValid.
This checked arguments against a few fundamental go types and
prevented others from being passed in as arguments.

The new interface driver.NamedValueChecker may be implemented
by both driver.Stmt and driver.Conn. This allows
this new interface to completely supersede the
driver.ColumnConverter interface as it can be used for
checking arguments known to a prepared statement and
arbitrary query arguments. The NamedValueChecker may be
skipped with driver.ErrSkip after all special cases are
exhausted to use the default argument converter.

In addition if driver.ErrRemoveArgument is returned
the argument will not be passed to the query at all,
useful for passing in driver specific per-query options.

Add a canonical Out argument wrapper to be passed
to OUTPUT parameters. This will unify checks that need to
be written in the NameValueChecker.

The statement number check is also moved to the argument
converter so the NamedValueChecker may remove arguments
passed to the query.

Fixes #13567
Fixes #18079
Updates #18417
Updates #17834
Updates #16235
Updates #13067
Updates #19797

Change-Id: I89088bd9cca4596a48bba37bfd20d987453ef237
Reviewed-on: https://go-review.googlesource.com/38533
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-18 22:22:31 +00:00
griesemer
9044cb04f2 test: restore fixedbugs/bug398.go to original version
Cannot reproduce original problem. Compiler internals
have changed enough such that this appears to work now.

Restore original test (exported interfaces), but also
keep version of the test using non-exported interfaces.

Fixes #15596.

Change-Id: Idb32da80239963242bd5d1609343c80f19773b0c
Reviewed-on: https://go-review.googlesource.com/43622
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2017-05-18 21:45:03 +00:00
Josh Bleecher Snyder
79eb88285b test: add test for issue 18636
Updates #18636

Change-Id: I143c670c3940231e29f1814e0a03165682f53243
Reviewed-on: https://go-review.googlesource.com/43621
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
2017-05-18 21:33:05 +00:00
Josh Bleecher Snyder
85b2940f5c cmd/compile: search for remaining WB ops from end to beginning
The writebarrier pass processes WB ops from beginning to end,
replacing them by other values.
But it also checks whether there are more ops to process
by walking from beginning to end.
This is quadratic, so walk from end to beginning instead.

This speeds up compiling the code in issue 13554:

name  old time/op       new time/op       delta
Pkg         11.9s ± 2%         8.3s ± 3%  -29.88%  (p=0.000 n=18+17)

Updates #13554

Passes toolstash-check.

Change-Id: I5f8a872ddc4b783540220d89ea2ee188a6d2b2ff
Reviewed-on: https://go-review.googlesource.com/43571
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-05-18 20:14:12 +00:00
Josh Bleecher Snyder
638ebb04f2 cmd/compile: don't break up contiguous blocks in looprotate
looprotate finds loop headers and arranges for them to be placed
after the body of the loop. This eliminates a jump from the body.

However, if the loop header is a series of contiguously laid out blocks,
the rotation introduces a new jump in that series.
This CL expands the "loop header" to move to be the entire
run of contiguously laid out blocks in the same loop.

This shrinks object files a little, and actually speeds up
the compiler noticeably. Numbers below.

Fannkuch performance seems to vary a lot by machine. On my laptop:

name          old time/op  new time/op  delta
Fannkuch11-8   2.89s ± 2%   2.85s ± 3%  -1.22%  (p=0.000 n=50+50)

This has a significant affect on the append benchmarks in #14758:

name   old time/op    new time/op    delta
Foo-8     312ns ± 3%     276ns ± 2%  -11.37%  (p=0.000 n=30+29)
Bar-8     565ns ± 2%     456ns ± 2%  -19.27%  (p=0.000 n=27+28)

Updates #18977
Fixes #20355

name        old time/op       new time/op       delta
Template          205ms ± 5%        204ms ± 8%    ~     (p=0.903 n=92+99)
Unicode          85.3ms ± 4%       85.1ms ± 3%    ~     (p=0.191 n=92+94)
GoTypes           512ms ± 4%        507ms ± 4%  -0.93%  (p=0.000 n=95+97)
Compiler          2.38s ± 3%        2.35s ± 3%  -1.27%  (p=0.000 n=98+95)
SSA               4.67s ± 3%        4.64s ± 3%  -0.62%  (p=0.000 n=95+96)
Flate             117ms ± 3%        117ms ± 3%    ~     (p=0.099 n=84+86)
GoParser          139ms ± 4%        137ms ± 4%  -0.90%  (p=0.000 n=97+98)
Reflect           329ms ± 5%        326ms ± 6%  -0.97%  (p=0.002 n=99+98)
Tar               102ms ± 6%        101ms ± 5%  -0.97%  (p=0.006 n=97+97)
XML               198ms ±10%        196ms ±13%    ~     (p=0.087 n=100+100)
[Geo mean]        318ms             316ms       -0.72%

name        old user-time/op  new user-time/op  delta
Template          250ms ± 7%        250ms ± 7%    ~     (p=0.850 n=94+92)
Unicode           107ms ± 8%        106ms ± 5%  -0.76%  (p=0.005 n=98+91)
GoTypes           665ms ± 5%        659ms ± 5%  -0.85%  (p=0.003 n=93+98)
Compiler          3.15s ± 3%        3.10s ± 3%  -1.60%  (p=0.000 n=99+98)
SSA               6.82s ± 3%        6.72s ± 4%  -1.55%  (p=0.000 n=94+98)
Flate             138ms ± 8%        138ms ± 6%    ~     (p=0.369 n=94+92)
GoParser          170ms ± 5%        168ms ± 6%  -1.13%  (p=0.002 n=96+98)
Reflect           412ms ± 8%        416ms ± 8%    ~     (p=0.169 n=100+100)
Tar               123ms ±18%        123ms ±14%    ~     (p=0.896 n=100+100)
XML               236ms ± 9%        234ms ±11%    ~     (p=0.124 n=100+100)
[Geo mean]        401ms             398ms       -0.63%

name        old alloc/op      new alloc/op      delta
Template         38.8MB ± 0%       38.8MB ± 0%    ~     (p=0.222 n=5+5)
Unicode          28.7MB ± 0%       28.7MB ± 0%    ~     (p=0.421 n=5+5)
GoTypes           109MB ± 0%        109MB ± 0%    ~     (p=0.056 n=5+5)
Compiler          457MB ± 0%        457MB ± 0%  +0.07%  (p=0.008 n=5+5)
SSA              1.10GB ± 0%       1.10GB ± 0%  +0.05%  (p=0.008 n=5+5)
Flate            24.5MB ± 0%       24.5MB ± 0%    ~     (p=0.222 n=5+5)
GoParser         30.9MB ± 0%       31.0MB ± 0%  +0.21%  (p=0.016 n=5+5)
Reflect          73.4MB ± 0%       73.4MB ± 0%    ~     (p=0.421 n=5+5)
Tar              25.5MB ± 0%       25.5MB ± 0%    ~     (p=0.548 n=5+5)
XML              40.9MB ± 0%       40.9MB ± 0%    ~     (p=0.151 n=5+5)
[Geo mean]       71.6MB            71.6MB       +0.07%

name        old allocs/op     new allocs/op     delta
Template           394k ± 0%         394k ± 0%    ~     (p=1.000 n=5+5)
Unicode            344k ± 0%         343k ± 0%    ~     (p=0.310 n=5+5)
GoTypes           1.16M ± 0%        1.16M ± 0%    ~     (p=1.000 n=5+5)
Compiler          4.42M ± 0%        4.42M ± 0%    ~     (p=1.000 n=5+5)
SSA               9.80M ± 0%        9.80M ± 0%    ~     (p=0.095 n=5+5)
Flate              237k ± 1%         238k ± 1%    ~     (p=0.310 n=5+5)
GoParser           320k ± 0%         322k ± 1%  +0.50%  (p=0.032 n=5+5)
Reflect            958k ± 0%         957k ± 0%    ~     (p=0.548 n=5+5)
Tar                252k ± 1%         252k ± 0%    ~     (p=1.000 n=5+5)
XML                400k ± 0%         400k ± 0%    ~     (p=0.841 n=5+5)
[Geo mean]         741k              742k       +0.06%

name        old object-bytes  new object-bytes  delta
Template           386k ± 0%         386k ± 0%  -0.05%  (p=0.008 n=5+5)
Unicode            202k ± 0%         202k ± 0%  -0.01%  (p=0.008 n=5+5)
GoTypes           1.16M ± 0%        1.16M ± 0%  -0.06%  (p=0.008 n=5+5)
Compiler          3.91M ± 0%        3.91M ± 0%  -0.06%  (p=0.008 n=5+5)
SSA               7.91M ± 0%        7.92M ± 0%  +0.01%  (p=0.008 n=5+5)
Flate              228k ± 0%         227k ± 0%  -0.04%  (p=0.008 n=5+5)
GoParser           283k ± 0%         283k ± 0%  -0.06%  (p=0.008 n=5+5)
Reflect            952k ± 0%         951k ± 0%  -0.02%  (p=0.008 n=5+5)
Tar                187k ± 0%         187k ± 0%  -0.04%  (p=0.008 n=5+5)
XML                406k ± 0%         406k ± 0%  -0.05%  (p=0.008 n=5+5)
[Geo mean]         648k              648k       -0.04%

Change-Id: I8630c4291a0eb2f7e7927bc04d7cc0efef181094
Reviewed-on: https://go-review.googlesource.com/43491
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-18 17:58:39 +00:00
Alberto Donizetti
9a432552cb os: document that NewFile can return nil
Fixes #20023

Change-Id: I1bec3e69031ffcfd7ad71716be9597ec322528ff
Reviewed-on: https://go-review.googlesource.com/41211
Reviewed-by: Russ Cox <rsc@golang.org>
2017-05-18 17:14:11 +00:00
Alberto Donizetti
2d1829b539 cmd/compile: don't panic in complex division
Updates #20227

Change-Id: Idadc3137490181a5d380367660cee21e8313cf3b
Reviewed-on: https://go-review.googlesource.com/42650
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-05-18 16:39:05 +00:00
Ben Shi
c7cae34b19 cmd/internal/obj/arm: remove illegal form of the SWI instruction
SWI only support "SWI $imm", but currently "SWI (Reg)" is also
accepted. This patch fixes it.

And more instruction tests are added to cmd/asm/internal/asm/testdata/arm.s

fixes #20375

Change-Id: Id437d853924a403e41da9b6cbddd20d994b624ff
Reviewed-on: https://go-review.googlesource.com/43552
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-05-18 13:38:13 +00:00
Alex Brainman
0927b4728d net: adjust TestInterfaceHardwareAddrWithGetmac
Ignore adapters with "Transport Name:   N/A" line in getmac
command output. This allows us to skip duplicate MAC addresses.

Fixes #19537.

Change-Id: I6b7be9d31322f963e02023c8f1037f6e9042b479
Reviewed-on: https://go-review.googlesource.com/39071
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Avelino <t@avelino.xxx>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-18 05:33:56 +00:00
Alex Brainman
b5e964cc1c cmd/link: make sure that runtime.epclntab lives in .text section
Second attempt to fix #14710.

CL 35272 already tried to fix this issue. But CL 35272 assumed
that runtime.epclntab type is STEXT, while it is actually SRODATA.

This CL uses Symbol.Sect.Seg to determine if symbol is part
of Segtext or Segdata.

Fixes #14710

Change-Id: Ic6b6f657555c87a64d2bc36cc4c07ab0591d00c4
Reviewed-on: https://go-review.googlesource.com/42390
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-05-18 05:32:41 +00:00
Ian Lance Taylor
f700f89b0b test: add missing copyright header to checkbce.go
Change-Id: Iafeb8e033c876f482caa17cca414fe13b0fadb12
Reviewed-on: https://go-review.googlesource.com/43613
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
2017-05-18 00:05:25 +00:00
Austin Clements
c34add780b runtime/pprof: don't produce 0 location in count profiles
profileBuilder.locForPC returns 0 to mean "no location" because 0 is
an invalid location index. However, the code to build count profiles
doesn't check the result of locForPC, so this 0 location index ends up
in the profile's location list. This, in turn, causes problems later
when we decode the profile because it puts a nil *Location in the
sample's location slice, which can later lead to a nil pointer panic.

Fix this by making printCountProfile correctly discard the result of
locForPC if it returns 0. This makes this call match the other two
calls of locForPC.

Updates #15156.

Change-Id: I4492b3652b513448bc56f4cfece4e37da5e42f94
Reviewed-on: https://go-review.googlesource.com/43630
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-17 18:58:31 +00:00
Carl Henrik Lunde
2dc27839df runtime/pprof: deflake TestGoroutineCounts
TestGoroutineCounts was flaky when running on a system under load.
This happened on three builds the last couple of days.

Fix this by running this test with a single operating system thread, so
we do not depend on the operating system scheduler.  50 000 tests ran
without failure with the new version, the old version failed 0.5% of the
time.

Fixes #15156.

Change-Id: I1e5a18d0fef4f72cc9a56e376822b2849cdb0f8b
Reviewed-on: https://go-review.googlesource.com/43590
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2017-05-17 18:53:33 +00:00
Josh Bleecher Snyder
b3e577b9e7 cmd/compile: fuse from end to beginning
fuseBlockPlain was accidentally quadratic.
If you had plain blocks b1 -> b2 -> b3 -> b4,
each containing single values v1, v2, v3, and v4 respectively,
fuseBlockPlain would move v1 from b1 to b2 to b3 to b4,
then v2 from b2 to b3 to b4, etc.

There are two obvious fixes.

* Look for runs of blocks in fuseBlockPlain
  and handle them in a single go.
* Fuse from end to beginning; any given value in a run
  of blocks to fuse then moves only once.

The latter is much simpler, so that's what this CL does.

Somewhat surprisingly, this change does not pass toolstash-check.

The resulting set of blocks is the same,
and the values in them are the same,
but the order of values in them differ,
and that order of values (while arbitrary)
is enough to change the compiler's output.
This may be due to #20178; deadstore is the next pass after fuse.

Adding basic sorting to the beginning of deadstore
is enough to make this CL pass toolstash-check:

	for _, b := range f.Blocks {
		obj.SortSlice(b.Values, func(i, j int) bool { return b.Values[i].ID < b.Values[j].ID })
	}

Happily, this CL appears to result in better code on average,
if only by accident. It cuts 4k off of cmd/go; go1 benchmarks
are noisy as always but don't regress (numbers below).

No impact on the standard compilebench benchmarks.
For the code in #13554, this speeds up compilation dramatically:

name  old time/op       new time/op       delta
Pkg         53.1s ± 2%        12.8s ± 3%  -75.92%  (p=0.008 n=5+5)

name  old user-time/op  new user-time/op  delta
Pkg         55.0s ± 2%        14.9s ± 3%  -73.00%  (p=0.008 n=5+5)

name  old alloc/op      new alloc/op      delta
Pkg        2.04GB ± 0%       2.04GB ± 0%   +0.18%  (p=0.008 n=5+5)

name  old allocs/op     new allocs/op     delta
Pkg         6.21M ± 0%        6.21M ± 0%     ~     (p=0.222 n=5+5)

name  old object-bytes  new object-bytes  delta
Pkg         28.4M ± 0%        28.4M ± 0%   +0.00%  (p=0.008 n=5+5)

name  old export-bytes  new export-bytes  delta
Pkg           208 ± 0%          208 ± 0%     ~     (all equal)


Updates #13554


go1 benchmarks:

name                     old time/op    new time/op    delta
BinaryTree17-8              2.29s ± 2%     2.26s ± 2%  -1.43%  (p=0.000 n=48+50)
Fannkuch11-8                2.74s ± 2%     2.79s ± 2%  +1.63%  (p=0.000 n=50+49)
FmtFprintfEmpty-8          36.6ns ± 3%    34.6ns ± 4%  -5.29%  (p=0.000 n=49+50)
FmtFprintfString-8         58.3ns ± 3%    59.1ns ± 3%  +1.35%  (p=0.000 n=50+49)
FmtFprintfInt-8            62.4ns ± 2%    63.2ns ± 3%  +1.19%  (p=0.000 n=49+49)
FmtFprintfIntInt-8         95.1ns ± 2%    96.7ns ± 3%  +1.61%  (p=0.000 n=49+50)
FmtFprintfPrefixedInt-8     118ns ± 3%     113ns ± 2%  -4.00%  (p=0.000 n=50+49)
FmtFprintfFloat-8           191ns ± 2%     192ns ± 2%  +0.40%  (p=0.034 n=50+50)
FmtManyArgs-8               419ns ± 2%     420ns ± 2%    ~     (p=0.228 n=49+49)
GobDecode-8                5.26ms ± 3%    5.19ms ± 2%  -1.33%  (p=0.000 n=50+49)
GobEncode-8                4.12ms ± 2%    4.15ms ± 3%  +0.68%  (p=0.007 n=49+50)
Gzip-8                      198ms ± 2%     197ms ± 2%  -0.50%  (p=0.018 n=48+48)
Gunzip-8                   31.9ms ± 3%    31.8ms ± 3%  -0.47%  (p=0.024 n=50+50)
HTTPClientServer-8         64.4µs ± 0%    64.0µs ± 0%  -0.55%  (p=0.000 n=43+46)
JSONEncode-8               10.6ms ± 2%    10.6ms ± 3%    ~     (p=0.543 n=49+49)
JSONDecode-8               43.3ms ± 3%    43.1ms ± 2%    ~     (p=0.079 n=50+50)
Mandelbrot200-8            3.70ms ± 2%    3.70ms ± 2%    ~     (p=0.553 n=47+50)
GoParse-8                  2.70ms ± 2%    2.71ms ± 3%    ~     (p=0.843 n=49+50)
RegexpMatchEasy0_32-8      70.5ns ± 4%    70.4ns ± 4%    ~     (p=0.867 n=48+50)
RegexpMatchEasy0_1K-8       162ns ± 3%     162ns ± 2%    ~     (p=0.739 n=48+48)
RegexpMatchEasy1_32-8      66.1ns ± 5%    66.2ns ± 4%    ~     (p=0.970 n=50+50)
RegexpMatchEasy1_1K-8       297ns ± 7%     296ns ± 7%    ~     (p=0.406 n=50+50)
RegexpMatchMedium_32-8      105ns ± 5%     105ns ± 5%    ~     (p=0.702 n=50+50)
RegexpMatchMedium_1K-8     32.3µs ± 4%    32.2µs ± 3%    ~     (p=0.614 n=49+49)
RegexpMatchHard_32-8       1.75µs ±18%    1.74µs ±12%    ~     (p=0.738 n=50+48)
RegexpMatchHard_1K-8       52.2µs ±14%    51.3µs ±13%    ~     (p=0.230 n=50+50)
Revcomp-8                   366ms ± 3%     367ms ± 3%    ~     (p=0.745 n=49+49)
Template-8                 48.5ms ± 4%    48.5ms ± 4%    ~     (p=0.824 n=50+48)
TimeParse-8                 263ns ± 2%     256ns ± 2%  -2.98%  (p=0.000 n=48+49)
TimeFormat-8                265ns ± 3%     262ns ± 3%  -1.35%  (p=0.000 n=48+49)
[Geo mean]                 41.1µs         40.9µs       -0.48%


Change-Id: Ib35fa15b54282abb39c077d150beee27f610891a
Reviewed-on: https://go-review.googlesource.com/43570
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2017-05-17 16:28:09 +00:00
Josh Bleecher Snyder
ff262913fe cmd/compile: seed rand with time when race enabled
When the race detector is enabled,
the compiler randomizes the order in which functions are compiled,
in an attempt to shake out bugs.
But we never re-seed the rand source, so every execution is identical.
Fix that to get more coverage.

Change-Id: If5cdde03ef4f1bab5f45e07f03fb6614945481d7
Reviewed-on: https://go-review.googlesource.com/43572
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-17 16:18:45 +00:00
Hiroshi Ioka
7555a45dc2 cmd/cgo: support large unsigned macros
Currently, cgo converts integer macros into int64 if it's possible.
As a result, some macros which satisfy

math.MaxInt64 < x <= math.MaxUint64

will lose their original values.

This CL introduces the new probe to check signs,
so we can handle signed ints and unsigned ints separately.

Fixes #20369

Change-Id: I002ba452a82514b3a87440960473676f842cc9ee
Reviewed-on: https://go-review.googlesource.com/43476
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-17 14:42:29 +00:00
Ian Lance Taylor
c20e54533e cmd/go: don't fail on missing runtime/internal/sys/zversion.go
The generated file runtime/internal/sys/zversion.go is deleted by
`go tool cmd dist clean` as part of running clean.bash. Don't treat
a missing file as a reason to stop running the go tool; just treat
is as meaning that runtime/internal/sys is stale.

No test because I don't particularly want to clobber $GOROOT.

Fixes #20385.

Change-Id: I5251a99542cc93c33f627f133d7118df56e18af1
Reviewed-on: https://go-review.googlesource.com/43559
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-05-17 01:30:51 +00:00
Ian Lance Taylor
acc56909f2 cmd/go: fix TestExecutableGOROOT if GOROOT is a symlink
Fixes #20365.

Change-Id: If1a4866193cff3bc836d8bbf18b6a1f5deb9808d
Reviewed-on: https://go-review.googlesource.com/43550
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com>
2017-05-17 01:22:12 +00:00