Alexandre Cesaro [Tue, 23 Dec 2014 19:29:13 +0000 (20:29 +0100)]
net/mail: move RFC 2047 code to internal/mime
The code concerning quoted-printable encoding (RFC 2045) and its
variant for MIME headers (RFC 2047) is currently spread in
mime/multipart and net/mail. It is also not exported.
This commit is the second step to fix that issue. It moves the
RFC 2047 encoding and decoding functions from net/mail to
internal/mime. The exported API is unchanged.
Jan Kratochvil [Sat, 21 Feb 2015 16:35:01 +0000 (17:35 +0100)]
gdb: fix "gdb.error: No struct named reflect.rtype."
With a trivial Golang-built program loaded in gdb-7.8.90.20150214-7.fc23.x86_64
I get this error:
(gdb) source ./src/runtime/runtime-gdb.py
Loading Go Runtime support.
Traceback (most recent call last):
File "./src/runtime/runtime-gdb.py", line 230, in <module>
_rctp_type = gdb.lookup_type("struct reflect.rtype").pointer()
gdb.error: No struct type named reflect.rtype.
(gdb) q
No matter if this struct should or should not be in every Golang-built binary
this change should fix that with no disadvantages.
Change-Id: I0c490d3c9bbe93c65a2183b41bfbdc0c0f405bd1
Reviewed-on: https://go-review.googlesource.com/5521 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Mark Bucciarelli [Sun, 22 Feb 2015 02:14:45 +0000 (21:14 -0500)]
Call --> CallSlice in two spots. No logic change, docs only.
Change-Id: I6011e162214db2d65efc1ecdb5ec600ca8e5bfe9
Reviewed-on: https://go-review.googlesource.com/5542 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Dmitry Vyukov [Fri, 30 Jan 2015 10:31:43 +0000 (13:31 +0300)]
cmd/trace: add new command
Trace command allows to visualize and analyze traces.
Run as:
$ go tool trace binary trace.file
The commands opens web browser with the main page,
which contains links for trace visualization,
blocking profiler, network IO profiler and per-goroutine
traces.
Also move trace parser from runtime/pprof/trace_parser_test.go
to internal/trace/parser.go, so that it can be shared between
tests and the command.
Change-Id: Ic97ed59ad6e4c7e1dc9eca5e979701a2b4aed7cf
Reviewed-on: https://go-review.googlesource.com/3601 Reviewed-by: Andrew Gerrand <adg@golang.org>
Change-Id: I7d598e53de86586bb9702d8e9276a4d6aece2dfc
Reviewed-on: https://go-review.googlesource.com/4950 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Dmitry Vyukov [Sat, 14 Feb 2015 12:54:25 +0000 (15:54 +0300)]
runtime: adjust program counters in race detector
In most cases we pass return PC to race detector,
and race runtime subtracts one from them.
However, in manual instrumentation in runtime
we pass function start PC to race runtime.
Race runtime can't distinguish these cases
and so it does not subtract one from top PC.
This leads to bogus line numbers in some cases.
Make it consistent and always pass what looks
like a return PC, so that race runtime can
subtract one and still get PC in the same function.
Also delete two unused functions.
Update #8053
Change-Id: I4242dec5e055e460c9a8990eaca1d085ae240ed2
Reviewed-on: https://go-review.googlesource.com/4902 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Dmitry Vyukov [Tue, 17 Feb 2015 11:25:49 +0000 (14:25 +0300)]
runtime: fix cputicks on x86
See the following issue for context:
https://github.com/golang/go/issues/9729#issuecomment-74648287
In short, RDTSC can produce skewed results without preceding LFENCE/MFENCE.
Information on this matter is very scrappy in the internet.
But this is what linux kernel does (see rdtsc_barrier).
It also fixes the test program on my machine.
Update #9729
Change-Id: I3c1ffbf129fdfdd388bd5b7911b392b319248e68
Reviewed-on: https://go-review.googlesource.com/5033 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Mikio Hara [Tue, 10 Feb 2015 03:24:11 +0000 (12:24 +0900)]
net, syscall: more accurate parsers for routing messages on BSD variants
This changes fixes two issues with regard to handling routing messages
as follows:
- Misparsing on platforms (such as FreeBSD) supporting multiple
architectures in the same kernel (kern.supported_archs="amd64 i386")
- Misparsing with unimplemented messages such as route, interface
address state notifications
To fix those issues, this change implements all the required socket
address parsers, adds a processor architecture identifying function to
FreeBSD and tests.
Fixes #9707.
Fixes #8203.
Change-Id: I7ed7b4a0b6f10f54b29edc681a2f35603f2d8d45
Reviewed-on: https://go-review.googlesource.com/4330 Reviewed-by: Ian Lance Taylor <iant@golang.org>
It would allow go get and friends to transparently work as expected,
automatically rewriting https URLs to use SSH for auth. This worked both
when pushing and pulling.
In Go 1.4 this broke, now requiring the use of `go get -f` instead of `go get`
in order to fetch private repositories. This seems neither intended nor
practical, as it requires changing a lot of tooling.
So just use `git config remote.origin.url` instead of `git remote -v` as
this reflects the actual substitution intended in the `insteadOf` config
directive.
Also remove now useless parsing.
Also add a check against supported schemes to avoid errors in later
commands using this URL and expecting such a scheme.
Fixes #9697
Change-Id: I907327f83504302288f913a68f8222a5c2d673ee
Reviewed-on: https://go-review.googlesource.com/3504 Reviewed-by: Andrew Gerrand <adg@golang.org>
Russ Cox [Thu, 19 Feb 2015 18:38:46 +0000 (13:38 -0500)]
runtime: reorganize memory code
Move code from malloc1.go, malloc2.go, mem.go, mgc0.go into
appropriate locations.
Factor mgc.go into mgc.go, mgcmark.go, mgcsweep.go, mstats.go.
A lot of this code was in certain files because the right place was in
a C file but it was written in Go, or vice versa. This is one step toward
making things actually well-organized again.
Austin Clements [Thu, 19 Feb 2015 02:56:12 +0000 (21:56 -0500)]
runtime: use more natural types in struct workbuf
Until recently, struct workbuf had only lfnode and uintptr fields
before the obj array to make it convenient to compute the size of the
obj array. It slowly grew more fields until this became inconvenient
enough that it was restructured to make the size computation easy.
Now the size computation doesn't care what the field types are, so
switch to more natural types.
Austin Clements [Tue, 17 Feb 2015 15:53:31 +0000 (10:53 -0500)]
runtime: switch to gcWork abstraction
This converts the garbage collector from directly manipulating work
buffers to using the new gcWork abstraction.
The previous management of work buffers was rather ad hoc. As a
result, switching to the gcWork abstraction changes many details of
work buffer management.
If greyobject fills a work buffer, it can now pull from work.partial
in addition to work.empty.
Previously, gcDrain started with a partial or empty work buffer and
fetched an empty work buffer if it filled its current buffer (in
greyobject). Now, gcDrain starts with a full work buffer and fetches
an partial or empty work buffer if it fills its current buffer (in
greyobject). The original behavior was bad because gcDrain would
immediately drop the empty work buffer returned by greyobject and
fetch a full work buffer, which greyobject was likely to immediately
overflow, fetching another empty work buffer, etc. The new behavior
isn't great at the start because greyobject is likely to immediately
overflow the full buffer, but the steady-state behavior should be more
stable. Both before and after this change, gcDrain fetches a full
work buffer if it drains its current buffer. Basically all of these
choices are bad; the right answer is to use a dual work buffer scheme.
Previously, shade always fetched a work buffer (though usually from
m.currentwbuf), even if the object was already marked. Now it only
fetches a work buffer if it actually greys an object.
Austin Clements [Thu, 12 Feb 2015 17:53:48 +0000 (12:53 -0500)]
runtime: introduce higher-level GC work abstraction
This introduces a producer/consumer abstraction for GC work pointers
that internally handles the details of filling, draining, and
shuffling work buffers.
In addition to simplifying the GC code, this should make it easy for
us to change how we use work buffers, including cleaning up how we use
the work.partial queue, reintroducing a FIFO lookahead cache, adding
prefetching, and using dual buffers to avoid flapping.
This commit doesn't change any existing code. The following commit
will switch the garbage collector from explicit workbuf manipulation
to gcWork.
Aaron Jacobs [Wed, 18 Feb 2015 22:35:28 +0000 (09:35 +1100)]
encoding/json: Fixed the comment specifying Marshal behavior for maps.
The comment previously was reversed in sense (it appeared to be
describing unmarshaling). I've fixed that, and added the caveat that map
keys are subject to UTF-8 coercion like other strings.
Nigel Tao [Tue, 17 Feb 2015 05:28:10 +0000 (16:28 +1100)]
image: change Rectangle.Eq to return true for all empty rectangles, even
if their nominal Min and Max points differ.
This is a behavior change, but arguably a bug fix, as Eq wasn't
previously consistent with In, and the concept of a rectangle being a
set of points. This is demonstrated by the new geom_test.go test.
It does mean that r.Eq(s) no longer implies that Inset'ting both r and s
with a negative inset results in two rectangles that are still Eq, but
that seems acceptable to me.
The previous behavior is still available as "r == s".
Also clarify the image.Rect doc comment when the inputs are
non-canonical.
Also simplify the Point and Rectangle Eq implementations dating from
before Go 1.0, when you couldn't compare structs via the == operator.
Change-Id: Ic39e628db31dc5fe5220f4b444e6d5000eeace5b
Reviewed-on: https://go-review.googlesource.com/5006 Reviewed-by: Rob Pike <r@golang.org>
Env vars were incorrectly copying whole value of http.RemoteAddr
to REMOTE_ADDR and REMOTE_HOST. They contained IP:port pair which
instead should only have IP (RFC 3875, other sources).
Module also was not setting REMOTE_PORT variable which become de-facto
standard for passing TCP client port to CGI scripts (Apache mod_cgi,
IIS, and probably others)
Dmitry Vyukov [Thu, 5 Feb 2015 13:08:29 +0000 (16:08 +0300)]
cmd/gc: generate simpler names for closures
Fixes #8291
There were several complaints about closure names in the issue tracker.
The first problem is that you see names like net/http.func·001
in profiles, traces, etc. And there is no way to figure out what
is that function.
Another issue is non-US-ascii symbols. All programs out there
should accept UTF-8. But unfortunately it is not true in reality.
For example, less does not render middle dot properly.
This change prepends outer function name to closure name and
replaces middle dot with dot. Now names look like:
Austin Clements [Tue, 17 Feb 2015 20:01:43 +0000 (15:01 -0500)]
runtime: fix runtime-gdb_test on arm
Apparently when ARM stops at a GDB breakpoint, it appears to be in
syscall.Syscall. The "info goroutines" test expected it to be in a
runtime function. Since this isn't fundamental to the test, simply
tweak the test's regexp to make sure "info goroutines" prints some
running goroutine with an active M, but don't require it to be in any
particular function.
Change-Id: Iba2618b46d3dc49cef62ffb72484b83ea7b0317d
Reviewed-on: https://go-review.googlesource.com/5060 Reviewed-by: Dave Cheney <dave@cheney.net>
Austin Clements [Tue, 17 Feb 2015 02:56:10 +0000 (21:56 -0500)]
runtime: fix GDB "info goroutines" for Go 1.5
"info goroutines" is failing because it hasn't kept up with changes in
the 1.5 runtime. This fixes three issues preventing "info goroutines"
from working. allg is no longer a linked list, so switch to using the
allgs slice. The g struct's 'status' field is now called
'atomicstatus', so rename uses of 'status'. Finally, this was trying
to parse str(pc) as an int, but str(pc) can return symbolic
information after the raw hex value; fix this by stripping everything
after the first space.
This also adds a test for "info goroutines" to runtime-gdb_test, which
was previously quite skeletal.
Change-Id: I8ad83ee8640891cdd88ecd28dad31ed9b5833b7a
Reviewed-on: https://go-review.googlesource.com/4935 Reviewed-by: Minux Ma <minux@golang.org>
David Crawshaw [Mon, 16 Feb 2015 19:22:22 +0000 (14:22 -0500)]
cmd/go: skip stat check when using -toolexec
Change-Id: Idc88b1ee950e33cfe757a27e9a3383d879793af7
Reviewed-on: https://go-review.googlesource.com/4934 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Michael MacInnis [Fri, 30 Jan 2015 03:37:41 +0000 (22:37 -0500)]
os/signal: add ability to ignore signals and restore initial signal handlers
There is currently no way to ignore signals using the os/signal package.
It is possible to catch a signal and do nothing but this is not the same
as ignoring it. The new function Ignore allows a set of signals to be
ignored. The new function Reset allows the initial handlers for a set of
signals to be restored.
Fixes #5572
Change-Id: I5c0f07956971e3a9ff9b9d9631e6e3a08c20df15
Reviewed-on: https://go-review.googlesource.com/3580 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Matthew Dempsky [Fri, 13 Feb 2015 03:09:12 +0000 (12:09 +0900)]
runtime: remove C-style strcmp and strncmp helpers
Change-Id: I4aa23e3a0e765651c91907507a0194fd528b6223
Reviewed-on: https://go-review.googlesource.com/4662 Reviewed-by: Ian Lance Taylor <iant@golang.org>
video-001.cmyk.jpeg was then converted back to video-001.cmyk.png via
the GIMP. ImageMagick (convert) wasn't used for this second conversion
because IM's default color profiles complicates things.
Fixes #4500.
Change-Id: Ibf533f6a6c7e76883acc493ce3a4289d7875df3f
Reviewed-on: https://go-review.googlesource.com/4801 Reviewed-by: Rob Pike <r@golang.org>
Dmitry Vyukov [Sat, 14 Feb 2015 13:10:06 +0000 (16:10 +0300)]
cmd/gc: fix noscan maps
Change 85e7bee introduced a bug:
it marks map buckets as noscan when key and val do not contain pointers.
However, buckets with large/outline key or val do contain pointers.
This change takes key/val size into consideration when
marking buckets as noscan.
Change-Id: I7172a0df482657be39faa59e2579dd9f209cb54d
Reviewed-on: https://go-review.googlesource.com/4901 Reviewed-by: Keith Randall <khr@golang.org>
Robert Griesemer [Sat, 14 Feb 2015 05:47:10 +0000 (21:47 -0800)]
math/big: always round after the sign is set
Some rounding modes are affected by the sign of the value to
be rounded. Make sure the sign is set before round is called.
Added tests (that failed before the fix).
Change-Id: Idd09b8fcbab89894fede0b9bc922cda5ddc87930
Reviewed-on: https://go-review.googlesource.com/4876 Reviewed-by: Rob Pike <r@golang.org>
Shenghou Ma [Fri, 9 Jan 2015 02:43:47 +0000 (21:43 -0500)]
doc/asm: document that assembly function must use short name
e.g. ·Name instead of package·Name for automatic stack map to
be applied from its Go prototype.
The underlying reason is that liblink look up name with suffix
".args_stackmap" for the stackmap coming from its Go prototype,
but all the Go functions are named "".Name as this stage. Thus
an assembly function named package·Name will never find its
stackmap, which is named "".package.Name.args_stackmap.
Perhaps cmd/vet should give a warning for this.
Change-Id: I10d154a73ec969d574d20af877f747424350fbd1
Reviewed-on: https://go-review.googlesource.com/2588 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Robert Griesemer [Fri, 13 Feb 2015 20:47:44 +0000 (12:47 -0800)]
math/big: fix aliasing error in Add, Sub
Also:
- make representation more flexible (no need to store trailing 0 digits to match precision)
- simplify rounding as a consequence
- minor related fixes
TBR adonovan
Change-Id: Ie91075990688b506d28371ec3b633b8267397ebb
Reviewed-on: https://go-review.googlesource.com/4841 Reviewed-by: Rob Pike <r@golang.org>
Brad Fitzpatrick [Fri, 13 Feb 2015 16:06:36 +0000 (08:06 -0800)]
test: deflake init1.go test, tighten its bounds
Per the comment at top, this test is about whether the GC runs during
init, but it was testing more than that, and testing how much the GC
collected in a certain amount of time.
Instead, loosen this test to just see whether it ran at all and not
how well it did.
David Crawshaw [Fri, 13 Feb 2015 19:52:07 +0000 (14:52 -0500)]
cmd/ld: always mark tlsg STLSBSS
Android apps build again.
Defining TLSG in runtime/tls_arm.s gives it the type SNOPTRBSS, so its
type was never being set when GOOS=android. I considered modifying the
if statement, but I no longer understand the intention of the original
change (in d738c6b0cad). We were always setting it before, what
platform is this not valid for?
Fixes #9829
Change-Id: I3eaa4a9590893eff67695797eb22547a170cdbcd
Reviewed-on: https://go-review.googlesource.com/4834 Reviewed-by: Minux Ma <minux@golang.org> Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Shenghou Ma [Sat, 7 Feb 2015 19:06:02 +0000 (14:06 -0500)]
cmd/ld: set alignment for the .rel.plt section on 32-bit architectures
Fixes #9802.
Change-Id: I22c52a37bdb23a14cc4615c9519431bb14ca81ca
Reviewed-on: https://go-review.googlesource.com/4170 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Russ Cox [Thu, 12 Feb 2015 03:27:49 +0000 (22:27 -0500)]
cmd/ld: make cmd/ld a real library
Make cmd/ld a real library invoked by the individual linkers.
There are no reverse symbol references anymore
(symbols referred to in cmd/ld but defined in cmd/5l etc).
This means that in principle we could do an automatic
conversion of these to Go, as a stopgap until cmd/link is done
or as a replacement for cmd/link.
Change-Id: I4a94570257a3a7acc31601bfe0fad9dea0aea054
Reviewed-on: https://go-review.googlesource.com/4649 Reviewed-by: Rob Pike <r@golang.org>
Russ Cox [Thu, 5 Feb 2015 16:53:33 +0000 (11:53 -0500)]
cmd/gc: minor adjustments for C to Go translation
- remove a few uses of ? :
- rename variables named len
- rewrite a few gotos as nested switches
- move goto targets to scope allowed by Go
- use consistent return type of anyregalloc
(was int or int32 in different places)
- remove unused nr variable in agen
- include proper headers in generated builtin1.c
- avoid strange sized %E formats (%-6E, %2E)
- change gengcmask argument from uint8[16] to uint8*
(diagnosed by c2go; not an array in any real sense).
- replace #ifdef XXX with comment block in 5g/peep.c
- expand and remove FAIL macro from 5g
- expand and remove noimpl macro from 9g
- print regalloc errors to stdout in 8g
(only use of fprint(2, ...) in all compilers)
Russ Cox [Thu, 5 Feb 2015 15:47:44 +0000 (10:47 -0500)]
cmd/gc: eliminate some pointer arithmetic
In mparith, all the a1-- are problematic. Rewrite it all without pointers.
It's clearer anyway.
In popt, v is problematic because it is used both as a fixed pointer
(v = byvar[i]) and as a moving pointer (v = var; v++) aka slice.
Eliminate pointer movement.
Tested that this still produces bit-for-bit output for 'go build -a std'
compared to d260756 (current master).
Russ Cox [Wed, 11 Feb 2015 00:27:49 +0000 (19:27 -0500)]
cmd/gc: add debugging to liveness analysis
Even with debugmerge = 1, the debugging output only happens
with the -v command-line flag. This is useful because it gets added
in automatically when debugging things like registerization with -R -v.
Russ Cox [Fri, 6 Feb 2015 18:48:42 +0000 (13:48 -0500)]
cmd/yacc: adjust expansion of $n to be more useful in errors
When the compiler echoes back an expression, it shows the
generated yacc expression. Change the generated code to
use a slice so that $3 shows up as yyDollar[3] in such messages.
Consider changing testdata/expr/expr.y to say:
$$.Sub(float64($1), $3)
(The float64 conversion is incorrect.)
Before:
expr.y:70[expr.go:486]: cannot convert exprS[exprpt - 2].num (type *big.Rat) to type float64
After:
expr.y:70[expr.go:492]: cannot convert exprDollar[1].num (type *big.Rat) to type float64
Change-Id: I74e494069df588e62299d1fccb282f3658d8f8f4
Reviewed-on: https://go-review.googlesource.com/4630 Reviewed-by: Rob Pike <r@golang.org>
Roger Peppe [Sat, 10 Jan 2015 14:00:21 +0000 (14:00 +0000)]
encoding/xml: encoding name spaces correctly
The current XML printer does not understand the xmlns
attribute. This change changes it so that it interprets the
xmlns attributes in the tokens being printed, and uses
appropriate prefixes.
Fixes #7535.
Change-Id: I20fae291d20602d37deb41ed42fab4c9a50ec85d
Reviewed-on: https://go-review.googlesource.com/2660 Reviewed-by: Nigel Tao <nigeltao@golang.org>
Dmitry Vyukov [Fri, 13 Feb 2015 14:14:48 +0000 (17:14 +0300)]
runtime: fix stack corruption in race mode
MOVQ RARG0, 0(SP) smashes exactly what was saved by PUSHQ R15.
This code managed to work somehow with the current race runtime,
but corrupts caller arguments with new race runtime that I am testing.
Change-Id: I9ffe8b5eee86451db36e99dbf4d11f320192e576
Reviewed-on: https://go-review.googlesource.com/4810 Reviewed-by: Keith Randall <khr@golang.org>
Austin Clements [Thu, 12 Feb 2015 20:39:29 +0000 (15:39 -0500)]
runtime: rename drainworkbuf and drainobjects
drainworkbuf is now gcDrain, since it drains until there's
nothing left to drain. drainobjects is now gcDrainN because it's
the bounded equivalent to gcDrain.
The new names use the Go camel case convention because we have to
start somewhere. The "gc" prefix is because we don't have runtime
packages yet and just "drain" is too ambiguous.
Austin Clements [Thu, 12 Feb 2015 20:30:08 +0000 (15:30 -0500)]
runtime: remove drainallwbufs argument to drainworkbuf
All calls to drainworkbuf now pass true for this argument, so remove
the argument and update the documentation to reflect the simplified
interface.
At a higher level, there are no longer any situations where we drain
"one wbuf" (though drainworkbuf didn't guarantee this anyway). We
either drain everything, or we drain a specific number of objects.
Austin Clements [Thu, 12 Feb 2015 20:22:49 +0000 (15:22 -0500)]
runtime: eliminate drainworkbufs from scanblock
scanblock is only called during _GCscan and _GCmarktermination.
During _GCscan, scanblock didn't call drainworkbufs anyway. During
_GCmarktermination, there's really no point in draining some (largely
arbitrary) amount of work during the scanblock, since the GC is about
to drain everything anyway, so simply eliminate this case.
Make drainworkbuf accept a nil workbuf and perform the
getpartialorempty itself and replace all uses of scanblock(0, 0, nil,
nil) with direct calls to drainworkbuf(nil, true).
Austin Clements [Thu, 12 Feb 2015 20:00:54 +0000 (15:00 -0500)]
runtime: move checknocurrentwbuf() from scanblock to drainworkbuf
Previously, scanblock called checknocurrentwbuf() after
drainworkbuf(). Move this call into drainworkbuf so that every return
path from drainworkbuf calls checknocurrentwbuf(). This is equivalent
to the previous code because scanblock was the only caller of
drainworkbuf.
Dmitry Vyukov [Fri, 6 Feb 2015 12:09:46 +0000 (15:09 +0300)]
cmd/gc: transform closure calls to function calls
Currently we always create context objects for closures that capture variables.
However, it is completely unnecessary for direct calls of closures
(whether it is func()(), defer func()() or go func()()).
This change transforms any OCALLFUNC(OCLOSURE) to normal function call.
Closed variables become function arguments.
This transformation is especially beneficial for go func(),
because we do not need to allocate context object on heap.
But it makes direct closure calls a bit faster as well (see BenchmarkClosureCall).
On implementation level it required to introduce yet another compiler pass.
However, the pass iterates only over xtop, so it should not be an issue.
Transformation consists of two parts: closure transformation and call site
transformation. We can't run these parts on different sides of escape analysis,
because tree state is inconsistent. We can do both parts during typecheck,
we don't know how to capture variables and don't have call site.
We can't do both parts during walk of OCALLFUNC, because we can walk
OCLOSURE body earlier.
So now capturevars pass only decides how to capture variables
(this info is required for escape analysis). New transformclosure
pass, that runs just before order/walk, does all transformations
of a closure. And later walk of OCALLFUNC(OCLOSURE) transforms call site.
benchmark old ns/op new ns/op delta
BenchmarkClosureCall 4.89 3.09 -36.81%
BenchmarkCreateGoroutinesCapture 1634 1294 -20.81%
benchmark old allocs new allocs delta
BenchmarkCreateGoroutinesCapture 6 2 -66.67%
benchmark old bytes new bytes delta
BenchmarkCreateGoroutinesCapture 176 48 -72.73%