Unlike the legacy text format that outputs the count and the number of
cycles, the pprof tool expects contention profiles to include the count
and the delay time measured in nanoseconds. printCountCycleProfile
performs the conversion from cycles to nanoseconds.
(See parseContention function in
 cmd/vendor/github.com/google/pprof/profile/legacy_profile.go)

Fixes #21474

Change-Id: I8e8fb6ea803822d7eaaf9ecf1df3e236ad225a7b
Reviewed-on: https://go-review.googlesource.com/64410
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

The name of the temporary directory containing _testmain.go
was leaking into the binary.

Found with GODEBUG=gocacheverify=1 go test std.

Change-Id: I5b35f049b564f3eb65c6a791ee785d15255c7885
Reviewed-on: https://go-review.googlesource.com/75630
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

We build and run executables in the work directory,
and some users have $TMPDIR set noexec.

Fixes #8451.

Change-Id: I76bf2ddec84e9cb37ad9a6feb53a1a84b47aa263
Reviewed-on: https://go-review.googlesource.com/75475
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Fixes #20251.

Change-Id: I312a9534248668c8b3b4cf979591ed1a49e509e1
Reviewed-on: https://go-review.googlesource.com/75474
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Updating to commit 79c4198ef7bd1069f8f56501fc05f0f1d2c33d8a
from github.com/google/pprof

Fixes #22561.

Change-Id: Ib92fd443ccc067aef7214e59f594db7f2521535b
Reviewed-on: https://go-review.googlesource.com/75870
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This CL adds caching of built package files in $GOCACHE, so that
a second build with a particular configuration will be able to reuse
the work done in the first build of that configuration, even if the
first build was only "go build" and not "go install", or even if there
was an intervening "go install" that wiped out the installed copy of
the first build.

The benchjuju benchmark runs go build on a specific revision of jujud 10 times.

Before this CL:

	102.72u 15.29s 21.98r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	105.99u 15.55s 22.71r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	106.49u 15.70s 22.82r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	107.09u 15.72s 22.94r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	108.19u 15.85s 22.78r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	108.92u 16.00s 23.02r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	109.25u 15.82s 23.05r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	109.57u 15.96s 23.11r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	109.86u 15.97s 23.17r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	110.50u 16.05s 23.37r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...

After this CL:

	113.66u 17.00s 24.17r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.85u 0.68s 3.49r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.98u 0.72s 3.63r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	4.07u 0.72s 3.57r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.98u 0.70s 3.43r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	4.58u 0.70s 3.58r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.90u 0.70s 3.46r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.85u 0.71s 3.52r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.70u 0.69s 3.64r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...
	3.79u 0.68s 3.41r 	 go build -o /tmp/jujud github.com/juju/juju/cmd/jujud ...

This CL reduces the overall all.bash time from 4m22s to 4m17s on my laptop.
Not much faster, but also not slower.

See also #4719, #20137, #20372.

Change-Id: I101d5363f8c55bf4825167a5f6954862739bf000
Reviewed-on: https://go-review.googlesource.com/75473
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Change-Id: Ie9967c8aaf7cf2e90a442937df21b1218f7ae26f
Reviewed-on: https://go-review.googlesource.com/75472
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

The README is there to help people who stumble across the directory.

The access log is there to help us evaluate potential algorithms for
managing and pruning cache directories. For now the management
is manual: users have to run "go clean -cache" if they want the cache
to get smaller.

As a low-resolution version of the access log, we also update the
mtime on each cache file as they are used by the go command.
A simple refinement of go clean -cache would be to delete
(perhaps automatically) cache files that have not been used in more
than one day, or some suitable time period.

Change-Id: I1dd6309952942169d71256c4b50b723583d21fca
Reviewed-on: https://go-review.googlesource.com/75471
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Give users a way to remove their caches.

Change-Id: I0b041aa54b318e98605675f168fed54ab9b6fd14
Reviewed-on: https://go-review.googlesource.com/75470
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

The current GOROOT documentation could indicate that changing the
environment variable at runtime would affect the return value of
GOROOT. This is false as the returned value is the one used for the
build. This CL aims to clarify the confusion.

Fixes #22302

Change-Id: Ib68c30567ac864f152d2da31f001a98531fc9757
Reviewed-on: https://go-review.googlesource.com/75751Reviewed-by: Russ Cox <rsc@golang.org>

This change applies x86avxgen output.
https://go-review.googlesource.com/c/arch/+/66972
As an effect, many new AVX instructions are now available.

One of the side-effects of this patch is
sorted AXXX (A-enum) constants.

Some AVX1/2 instructions still not added due to:
1. x86.csv V0.2 does not list them;
2. partially because of (1), test suite does not contain tests for
   these instructions.

Change-Id: I90430d773974ca5c995d6950d90e2c62ec88ef47
Reviewed-on: https://go-review.googlesource.com/75490
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

BFC (Bit Field Clear) and BFI (Bit Field Insert) were
introduced in ARMv6T2, and the compiler can use them
to do further optimization.

Change-Id: I5a3fbcd2c2400c9bf4b939da6366c854c744c27f
Reviewed-on: https://go-review.googlesource.com/72891
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

With GOBUILDTIMELOGFILE set, make.bash logs the starting time using

  $ echo $(date) > file

and expects to be able to read the date back with

  time.Parse(time.UnixDate)

but in some locales the default date format is not the same as
time.UnixDate; for example on LC_TIME="en_GB.UTF-8"

  $ locale date_fmt
  %a %e %b %H:%M:%S %Z %Y

Fix this by setting LC_TIME=C before the date command invocation.

Fixes #22541

Change-Id: I59bf944bb868e2acdd816c7e35134780cdbfc6a6
Reviewed-on: https://go-review.googlesource.com/75370
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The current code can potentially return a smaller processor count on a
linux kernel when its cpumask_size (controlled by both kernel config and
boot parameter) is not a multiple of the pointer size, because
r/sys.PtrSize will be rounded down. Since sched_getaffinity returns the
size in bytes, we can just allocate the buf as a byte array to avoid the
extra calculation with the pointer size and roundups.

Change-Id: I0c21046012b88d8a56b5dd3dde1d158d94f8eea9
Reviewed-on: https://go-review.googlesource.com/75591
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

CL 49331 increased windows stack commit size to 2MB by mistake.
Revert that change.

Fixes #22439

Change-Id: I919e549e87da326f4ba45890b4d32f6d7046186f
Reviewed-on: https://go-review.googlesource.com/74490
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

Instead of trying to validate map key types eagerly in some
cases, delay their validation to the end of type-checking,
when we all type information is present.

Passes go build -toolexec 'toolstash -cmp' -a std .

Fixes #21273.
Fixes #21657.

Change-Id: I532369dc91c6adca1502d6aa456bb06b57e6c7ff
Reviewed-on: https://go-review.googlesource.com/75310Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Update vendored pprof to commit 4fc39a00b6b8c1aad05260f01429ec70e127252c
from github.com/google/pprof (2017-11-01).

Fixes #19380
Updates #21047

Change-Id: Ib64a94a45209039e5945acbcfa0392790c8ee41e
Reviewed-on: https://go-review.googlesource.com/57370
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The godoc for RoundTrip already specifies when it's ok to reuse a
request that contains a body: the caller must wait until RoundTrip
calls Close on Request.Body.

This CL adds a small clarification: If the request does not have a
body, it can be reused as long as the caller does not mutate the
Request until RoundTrip fails or the Response.Body is closed.

Fixes #19653

Change-Id: I56652a9369978d11650e2e6314104831c2ce5e78
Reviewed-on: https://go-review.googlesource.com/75671Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Usage of atomic.Value has a subtle requirement that the
value be of the same concrete type. In prior usage, the intention
was to consistently store a value of the error type.
Since error is an interface, the underlying concrete can differ.

Fix this by creating a type-safe abstraction over atomic.Value
that wraps errors in a struct{error} type to ensure consistent types.

Change-Id: Ica74f2daba15e4cff48d2b4f830d2cb51c608fb6
Reviewed-on: https://go-review.googlesource.com/75594
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The existing implementation names a c net.Conn return which is
never user. Leaving the returns unamed is marginally clearer.

Change-Id: If9a411c9235b78c116a8ffb21fef71f7a4a4ce8f
Reviewed-on: https://go-review.googlesource.com/66890Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates #22540

Change-Id: I63e8c4874f8a774e9c47affc856aadf8c35ca23b
Reviewed-on: https://go-review.googlesource.com/75593
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>

Prior to this CL loads with sign extension could not be replaced with
indexed loads (only loads with zero extension).

This CL also prevents large offsets (more than 20-bits) from being
merged into indexed loads. It is better to keep such offsets
separate.

Gives a small improvement in binary size, ~1.5KB from .text in cmd/go.

Change-Id: Ib848ffc2b05de6660c5ce2394ae1d1d144273e29
Reviewed-on: https://go-review.googlesource.com/36845
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

These are likely from the time when gc was written in C. There is no
need for any of these to be passed pointers, as the previous values are
not kept in any way, and the pointers are never nil. Others were left
untouched as they fell into one of these useful cases.

While at it, also turn some 0/1 integers into booleans.

Passes toolstash -cmp on std cmd.

Change-Id: Id3a9c9e84ef89536c4dc69a7fdbacd0fd7a76a9b
Reviewed-on: https://go-review.googlesource.com/72990
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Replace calls to memmove with known (constant) size, with OpMove.
Do it only if it is safe from aliasing point of view.
Helps with code like this:

append(buf,"const str"...)

In strconv this provides nice benefit:
Quote-6                                   731ns ± 2%   647ns ± 3%  -11.41%  (p=0.000 n=10+10)
QuoteRune-6                               117ns ± 5%   111ns ± 1%   -4.54%  (p=0.000 n=10+10)
AppendQuote-6                             475ns ± 0%   396ns ± 0%  -16.59%  (p=0.000 n=9+10)
AppendQuoteRune-6                        32.0ns ± 0%  27.4ns ± 0%  -14.41%  (p=0.000 n=8+9)

Change-Id: I7704f5c51b46aed2d8f033de74c75140fc35036c
Reviewed-on: https://go-review.googlesource.com/54394
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Updates #22540

Change-Id: I26e79c25652976fac6f2e5a7afb4fd1240996d74
Reviewed-on: https://go-review.googlesource.com/75531Reviewed-by: Tom Bergan <tombergan@google.com>
Run-TryBot: Tom Bergan <tombergan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

To improve readability when exported fields are removed,
forbid the printer from emitting an empty line before the first comment
in a const, var, or type block.
Also, when printing the "Has filtered or unexported fields." message,
add an empty line before it to separate the message from the struct
or interfact contents.

Before the change:
<<<
type NamedArg struct {

        // Name is the name of the parameter placeholder.
        //
        // If empty, the ordinal position in the argument list will be
        // used.
        //
        // Name must omit any symbol prefix.
        Name string

        // Value is the value of the parameter.
        // It may be assigned the same value types as the query
        // arguments.
        Value interface{}
        // contains filtered or unexported fields
}

>
> After the change:
> <<<
> type NamedArg struct {
>         // Name is the name of the parameter placeholder.
>         //
>         // If empty, the ordinal position in the argument list will be
>         // used.
>         //
>         // Name must omit any symbol prefix.
>         Name string
>
>         // Value is the value of the parameter.
>         // It may be assigned the same value types as the query
>         // arguments.
>         Value interface{}
>
>         // contains filtered or unexported fields
> }


Fixes #18264

Change-Id: I9fe17ca39cf92fcdfea55064bd2eaa784ce48c88
Reviewed-on: https://go-review.googlesource.com/71990
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

* Avoid calculating insertk until needed.
* Avoid a pointer into b.tophash and just track the insertion index.
  This avoids b.tophash being marked as escaping to heap.
* Calculate val only once at the end of the mapassign functions.

Function sizes decrease slightly, e.g. for mapassign_faststr:
before "".mapassign_faststr STEXT size=1166 args=0x28 locals=0x78
after  "".mapassign_faststr STEXT size=1080 args=0x28 locals=0x68

name                     old time/op  new time/op  delta
MapAssign/Int32/256-4    19.4ns ± 4%  19.5ns ±11%     ~     (p=0.973 n=20+20)
MapAssign/Int32/65536-4  32.5ns ± 2%  32.4ns ± 3%     ~     (p=0.078 n=20+19)
MapAssign/Int64/256-4    20.3ns ± 6%  17.6ns ± 5%  -13.01%  (p=0.000 n=20+20)
MapAssign/Int64/65536-4  33.3ns ± 2%  33.3ns ± 1%     ~     (p=0.444 n=20+20)
MapAssign/Str/256-4      22.3ns ± 3%  22.4ns ± 3%     ~     (p=0.343 n=20+20)
MapAssign/Str/65536-4    44.9ns ± 1%  43.9ns ± 1%   -2.39%  (p=0.000 n=20+19)

Change-Id: I2627bb8a961d366d9473b5922fa129176319eb22
Reviewed-on: https://go-review.googlesource.com/74870
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

We already do this for floor/ceil, but RoundToEven was added later.
Intrinsify it also.

name           old time/op  new time/op  delta
RoundToEven-8  3.00ns ± 1%  0.68ns ± 2%  -77.34%  (p=0.000 n=10+10)

Change-Id: Ib158cbceb436c6725b2d9353a526c5c4be19bcad
Reviewed-on: https://go-review.googlesource.com/74852
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
Reviewed-by: Keith Randall <khr@golang.org>

Fixes #21343

Change-Id: I3582fced902592fe12bfa29acf7b40b6e5e554a7
Reviewed-on: https://go-review.googlesource.com/75150
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

The comment on invalid time values in Constants and example
refers to _ zero padding when it should refer to space padding.

Change-Id: I5784356e389d324703e20eec6203f147db92880f
Reviewed-on: https://go-review.googlesource.com/75410Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The ztypes_windows* file names indicate that these are auto-generated
but they aren't. Rename them to types_windows* to avoid this confusion.

This follows CL 52950 which did the same for golang.org/x/sys.

Change-Id: Ia557ec5d4bcfb6bae20e34e71b5f3f190285794f
Reviewed-on: https://go-review.googlesource.com/75390
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The only file that really changed is
x/net/idna (upstream 8253218a).

See CL 73730: avoid memory leak in validation codes

The rest is just a small change in the
generation line at the top.

Change-Id: I62c5172f77f63d919c41d11c6db0a9517bc2a221
Reviewed-on: https://go-review.googlesource.com/74953Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Handle make(map[any]any) and make(map[any]any, hint) where
hint <= BUCKETSIZE special to allow for faster map initialization
and to improve binary size by using runtime calls with fewer arguments.

Given hint is smaller or equal to BUCKETSIZE in which case
overLoadFactor(hint, 0)  is false and no buckets would be allocated by makemap:
* If hmap needs to be allocated on the stack then only hmap's hash0
  field needs to be initialized and no call to makemap is needed.
* If hmap needs to be allocated on the heap then a new special
  makehmap function will allocate hmap and intialize hmap's
  hash0 field.

Reduces size of the godoc by ~36kb.

AMD64
name         old time/op    new time/op    delta
NewEmptyMap    16.6ns ± 2%     5.5ns ± 2%  -66.72%  (p=0.000 n=10+10)
NewSmallMap    64.8ns ± 1%    56.5ns ± 1%  -12.75%  (p=0.000 n=9+10)

Updates #6853

Change-Id: I624e90da6775afaa061178e95db8aca674f44e9b
Reviewed-on: https://go-review.googlesource.com/61190
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

Current AllowedOpCodes is 1024, which is not enough for modern x86.
Changed limit to 2048 (though AVX512 will exceed this).

Additional Z-cases and ytab tables are added to make it possible
to handle missing AVX1 and AVX2 instructions.

This CL is required by x86avxgen to work properly:
https://go-review.googlesource.com/c/arch/+/66972

Change-Id: I290214bbda554d2cba53349f50dcd34014fe4cee
Reviewed-on: https://go-review.googlesource.com/70650
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>

Add support for ADX cpuid bit detection and all instructions,
implied by that bit (ADOX/ADCX). They are useful for rsa and math/big in
general.

Change-Id: Idaa93303ead48fd18b9b3da09b3e79de2f7e2193
Reviewed-on: https://go-review.googlesource.com/74850
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Change-Id: Ifa7701e97c0ec7d113e952b2b366edf422d6df2f
Reviewed-on: https://go-review.googlesource.com/69351
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This change adds an asm implementations modf for ppc64x.

Improvements:

BenchmarkModf-16               7.48          6.26          -16.31%

Updates: #21390

Change-Id: I9c4f3213688e3e8842d050840dc04fc9c0bf6ce4
Reviewed-on: https://go-review.googlesource.com/74411
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Munday <mike.munday@ibm.com>

The comment currently implies that a zero will be added, but the
underscore is used to add a space for single-digit dates.

Change-Id: Ib3bac8a16bc2d1fcb26ab3bb7ad172b89e1a4a24
Reviewed-on: https://go-review.googlesource.com/75230Reviewed-by: Ian Lance Taylor <iant@golang.org>

Since CL 33071, testCPUProfile is only one user of the badOS map.
Replace it by the corresponding switch, with the "plan9" case removed
because it is already checked earlier in the same function.

Change-Id: Id647b8ee1fd37516bb702b35b3c9296a4f56b61b
Reviewed-on: https://go-review.googlesource.com/75110
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

If GODEBUG=gocacheverify=1, then instead of using the cache to
avoid computations, the go command will do the computations and
double-check that they match any existing cache entries.
This is handled entirely in the cache implementation; there's no
complexity added to any of the cache usage sites.

(As of this CL there aren't any cache usage sites, but soon there will be.)

Also change GOCMDDEBUGHASH to the more usual GODEBUG=gocachehash=1.

Change-Id: I574f181e06b5299b1d9c6d402e40c57a0e064e74
Reviewed-on: https://go-review.googlesource.com/75294
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>