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Commit Graph

50422 Commits

Author SHA1 Message Date
Robert Griesemer
3cd28baffd cmd/compile/internal/types2: factor out slice elem computation for copy built-in
Implement singleUnder[String] which determines a single underlying type
for a given type: either the underlying type, or the single underlying
type for a type parameter, if it exists. Use singleUnder[String] instead
of optype for copy built-in.

This CL removes a dependency on optype and also makes the copy built-in
slighty more general for generic arguments (the source argument may be
constrained by a slice or string simultaneously).

Change-Id: Ia329e96afc69a09d2ca3b1f82fe712d4f7ba1d9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/357413
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:17:58 +00:00
Robert Griesemer
b0f7eb6c0d cmd/go: update test script for reformatted error message (fix long builds)
TBR=iant

Change-Id: Ic72af52e5ff8d28f8102c07b03e4930df61445ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/358115
Trust: Robert Griesemer <gri@golang.org>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 12:44:47 +00:00
Cuong Manh Le
85d2751d2e cmd/compile: prevent compiling closures more than once
Since CL 282892, functions are always compiled before closures. To do
that, when walking the closure, it is added to its outer function queue
for scheduling compilation later. Thus, a closure may be added to queue
more than once, causing the ICE dues to being compiled twice.

To fix this, catching the re-walking of the closure expression and do
not add it to the compilation queue.

Fixes #49029

Change-Id: I7d188e8f5b4d5c4248a0d8e6389da26f1084e464
Reviewed-on: https://go-review.googlesource.com/c/go/+/357960
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-23 06:36:16 +00:00
Cuong Manh Le
6c200017bf doc: document new reflect.UnsafePointer function
Updates #40592

Change-Id: If66629e47ca9859128ee3ad8fb584e022d7a6982
Reviewed-on: https://go-review.googlesource.com/c/go/+/356255
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-23 06:31:02 +00:00
fanzha02
ae4d67c89d cmd/link: add -asan option
The -asan option causes the linker to link against the runtime/asan
package in order to use the C/C++ address sanitizer.

This CL passes tests but is not usable by itself.  The actual
runtime/asan package, and support for -asan in the go tool and the
compiler, and tests, are in separate CLs.

Updates #44853.

Change-Id: Ifc6046c1f75ba52777cbb3d937a4b66e91d5798d
Reviewed-on: https://go-review.googlesource.com/c/go/+/298610
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-22 21:48:34 +00:00
Robert Griesemer
5d414d180b cmd/compile/internal/types2: more detailed error messages for generic conversions
- slightly refactor convertibleTo and convertibleToImpl
- provide ability to return a conversion failure cause
- add detailed cause for generic conversions

For #47150.

Change-Id: Ie97d89be0234414ef4df22a6920e18acc944a102
Reviewed-on: https://go-review.googlesource.com/c/go/+/357249
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-22 21:26:30 +00:00
Robert Griesemer
76dd01f457 cmd/compile/internal/types2: reduce output when describing type parameters
There's no need to say "type parameter" for a type parameter. The
name is sufficient (they are always named), and the prose is followed
by "constrained by".

Change-Id: I98df8caa1432b8b7a874e58da6e3ed6be102b4a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/357410
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-22 21:12:07 +00:00
Andy Pan
ff8115d1a1 internal/poll: fix a few function names on comments
Change-Id: I5b1dfeeb0ae5ac32667633151ef83bcf4654c43f
Reviewed-on: https://go-review.googlesource.com/c/go/+/357957
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-22 14:05:31 +00:00
Cuong Manh Le
9ff91b9098 cmd/compile: only look for struct type when crawling inline body
CL 356254 fixed crawling of embeddable types during inline. However, we
are too agressive, since when we call markEmbed for every type seen
during inlining function body. That leads to false positive that for a
non-embedded type, its unexported methods are also marked inline.

Instead, we should only look at struct type that we seen during inlining
function body, and calling markEmbed for all of its embedded fields.

Fixes #49094

Change-Id: I6ef9a8bf1fc649ec6bf75e4883f6031ec8560ba1
Reviewed-on: https://go-review.googlesource.com/c/go/+/357232
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-10-22 00:57:18 +00:00
Cuong Manh Le
23e57e5955 reflect: make Value.Pointer panic on bad notinheap pointers
Same as CL 350153 did for Value.Elem to panic on bad notinheap pointers.
While at it, also add more tests for notinheap deref.

Change-Id: Id7d9d12ad8467de5926b6a7e8f9d659fea5fedb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/357630
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-22 00:56:18 +00:00
Robert Findley
3beab0cd71 go/types, types2: add the Interface.MarkImplicit method
Add a new interface method, MarkImplicit, to allow marking interfaces as
implicit from outside the type-checker. This is necessary so that we can
capture the implicit bit in export data, and use it from importers.

For #48424
For #49040

Change-Id: I999aba2a298f92432326d7ccbd87fe133a2e1a72
Reviewed-on: https://go-review.googlesource.com/c/go/+/357796
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-10-21 23:48:53 +00:00
Paul E. Murphy
5a3d0f5a63 cmd/internal/obj/ppc64: rework argument classifications
This introduces a number of new classifications which will make it
easier to generate functions to assemble the new instructions of
ISA 3.1, and potentially earlier versions.

No code generation changes should occur as a result of these. These
allow finer control over how an opcode is matched to an optab entry.

Literal values are now classified based on the smallest number of bits
needed to encode, and matching rules will accept a literal if it
can be zero/sign extended to fit a larger literal class.

Likewise, support classifying even register numbers for GPR, VSX, and
FPR instructions. Some instructions require and even/odd register pair,
and these are usually represented by specifying the even register, and
similarly encoded.

Likewise, add a unit test for the argument classifier function (aclass).
This caught an off-by-one bug in aclass which is also fixed.

Updates #44549

Change-Id: Ia03013aea8b56c4d59b7c3812cdd67ddb3b720b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/350152
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-21 20:12:09 +00:00
Dan Scales
b8da7e4c4c cmd/compile: fix inlining of labeled for loops
There is already a mechanism using inlgen to rename labels insided
inlined functions so that they are unique and don't clash with loops in
the outer function. This is used for OLABEL and OGOTO. Now that we are
doing inlining of OFOR loops, we need to do this translation for OBREAK,
OCONTINUE, and OFOR. I also added the translation for ORANGE loops, in
anticipation of a CL that will allow inlining of ORANGE for loops.

Fixes #49100

Change-Id: I2ccddc3350370825c386965f4a1e4bc54d3c369b
Reviewed-on: https://go-review.googlesource.com/c/go/+/357649
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
2021-10-21 19:08:43 +00:00
Michael Anthony Knyszek
f99e40aac0 runtime: detangle gcPaceScavenger from the pacer
Currently gcPaceScavenger is called by gcControllerState.commit, but it
manipulates global state which precludes testing. This change detangles
the two.

Change-Id: I10d8ebdf426d99ba49d2f2cb4fb64891e9fd6091
Reviewed-on: https://go-review.googlesource.com/c/go/+/309272
Reviewed-by: Michael Pratt <mpratt@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-21 18:20:19 +00:00
Michael Anthony Knyszek
6508fdad9d runtime: formalize and fix gcPercent synchronization
Currently gcController.gcPercent is read non-atomically by
gcControllerState.revise and gcTrigger.test, but these users may
execute concurrently with an update to gcPercent.

Although revise's results are best-effort, reading it directly in this
way is, generally speaking, unsafe.

This change makes gcPercent atomically updated for concurrent readers
and documents the complete synchronization semantics.

Because gcPercent otherwise only updated with the heap lock held or the
world stopped, all other reads can remain unsynchronized.

For #44167.

Change-Id: If09af103aae84a1e133e2d4fed8ab888d4b8f457
Reviewed-on: https://go-review.googlesource.com/c/go/+/308690
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
2021-10-21 18:19:51 +00:00
Robert Findley
8151b56c5d go/types, types2: always return an underlying type from optype
Optype should never return a defined type.

Change-Id: I37b29e0c958e127e75e834e71d6392ea80827773
Reviewed-on: https://go-review.googlesource.com/c/go/+/357694
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-21 17:42:54 +00:00
Amelia Downs
392bb0677c net/url: add testable examples for Values funcs
Change-Id: Id71f3d8d7c1ef7910d5d9497167dc677f2f0a2ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/356535
Trust: Damien Neil <dneil@google.com>
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2021-10-21 17:31:42 +00:00
Amelia Downs
24999c3a8a net/url: add testable examples for url pkg funcs
Change-Id: I61011b75128478aa50308d84f4cba23b3e241b3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/356536
Trust: Damien Neil <dneil@google.com>
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2021-10-21 17:31:26 +00:00
emahiro
02a36668aa runtime: fix typo of pushBackAll
Fixes: #49081
Change-Id: Ie6742f1e7a60c2d92ce1283bcfaa3eac521440a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/357629
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Cherry Mui <cherryyz@google.com>
2021-10-21 17:23:58 +00:00
Archana R
6ec9a1da2d internal/bytealg: fix Separator length check for Index/ppc64le
Modified condition in the ASM implementation of indexbody to
determine if separator length crosses 16 bytes to BGT from BGE
to avoid incorrectly crossing a page.

Also fixed IndexString to invoke indexbodyp9 when on the POWER9
platform

Change-Id: I0602a797cc75287990eea1972e9e473744f6f5a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/356849
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Trust: Keith Randall <khr@golang.org>
2021-10-21 15:45:05 +00:00
Lynn Boger
8b0bea993d cmd/compile/internal/ssa/gen: eliminate unnecessary neg and xori on PPC64
This adds a few rules to PPC64 to eliminate some instructions:
- when an isel is used to generate a boolean value based on a
condition and followed by an xori to flip the result, it can
instead flip the operands in the isel and avoid the xori.
= when a neg follows a sub the operands to the sub can be
swapped and the neg avoided.

There are several opportunities in reflect.DeepEqual to omit
xori which improves some of its benchmarks by as much as
5%

Change-Id: I81bbc02c0f16995c65934b6f045867b731ab302b
Reviewed-on: https://go-review.googlesource.com/c/go/+/357509
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-21 15:42:41 +00:00
Archana R
8b9c0d1a79 test/codegen: updated comparison test to verify on ppc64,ppc64le
Updated test/codegen/comparison.go to verify memequal is inlined
as implemented in CL 328291.

Change-Id: If7824aed37ee1f8640e54fda0f9b7610582ba316
Reviewed-on: https://go-review.googlesource.com/c/go/+/357289
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-21 13:05:07 +00:00
Cuong Manh Le
fca46d0b36 go/types: print assignment operation for invalid operation errors
This is port of CL 357229 for types2 to go/types.

Change-Id: I35ed6b784969210a00ea5b36238df7d6b7fa18bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/357230
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-21 02:35:47 +00:00
hkhere
73652af80d cmd/compile: use else if for mutually exclusive if statements
Change-Id: I43e5bb778fbba1398c8006b1644524a9885157db
GitHub-Last-Rev: fa76473ab8
GitHub-Pull-Request: golang/go#47155
Reviewed-on: https://go-review.googlesource.com/c/go/+/334169
Trust: Keith Randall <khr@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-10-20 20:58:15 +00:00
Michael Anthony Knyszek
016d5eea11 runtime: retype mheap.reclaimCredit as atomic.Uintptr
[git-generate]
cd src/runtime
mv export_test.go export.go
GOROOT=$(dirname $(dirname $PWD)) rf '
  add mheap.reclaimCredit \
// reclaimCredit is spare credit for extra pages swept. Since \
// the page reclaimer works in large chunks, it may reclaim \
// more than requested. Any spare pages released go to this \
// credit pool. \
reclaimCredit_ atomic.Uintptr
  ex {
    import "runtime/internal/atomic"

    var t mheap
    var v, w uintptr
    var d uintptr

    t.reclaimCredit -> t.reclaimCredit_.Load()
    t.reclaimCredit = v -> t.reclaimCredit_.Store(v)
    atomic.Loaduintptr(&t.reclaimCredit) -> t.reclaimCredit_.Load()
    atomic.LoadAcquintptr(&t.reclaimCredit) -> t.reclaimCredit_.LoadAcquire()
    atomic.Storeuintptr(&t.reclaimCredit, v) -> t.reclaimCredit_.Store(v)
    atomic.StoreReluintptr(&t.reclaimCredit, v) -> t.reclaimCredit_.StoreRelease(v)
    atomic.Casuintptr(&t.reclaimCredit, v, w) -> t.reclaimCredit_.CompareAndSwap(v, w)
    atomic.Xchguintptr(&t.reclaimCredit, v) -> t.reclaimCredit_.Swap(v)
    atomic.Xadduintptr(&t.reclaimCredit, d) -> t.reclaimCredit_.Add(d)
  }
  rm mheap.reclaimCredit
  mv mheap.reclaimCredit_ mheap.reclaimCredit
'
mv export.go export_test.go

Change-Id: I2c567781a28f5d8c2275ff18f2cf605b82f22d09
Reviewed-on: https://go-review.googlesource.com/c/go/+/356712
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-10-20 20:39:36 +00:00
Michael Anthony Knyszek
a91e976fd2 runtime: retype mheap.reclaimIndex as atomic.Uint64
[git-generate]
cd src/runtime
mv export_test.go export.go
GOROOT=$(dirname $(dirname $PWD)) rf '
  add mheap.reclaimIndex \
// reclaimIndex is the page index in allArenas of next page to \
// reclaim. Specifically, it refers to page (i % \
// pagesPerArena) of arena allArenas[i / pagesPerArena]. \
// \
// If this is >= 1<<63, the page reclaimer is done scanning \
// the page marks. \
reclaimIndex_ atomic.Uint64
  ex {
    import "runtime/internal/atomic"

    var t mheap
    var v, w uint64
    var d int64

    t.reclaimIndex -> t.reclaimIndex_.Load()
    t.reclaimIndex = v -> t.reclaimIndex_.Store(v)
    atomic.Load64(&t.reclaimIndex) -> t.reclaimIndex_.Load()
    atomic.LoadAcq64(&t.reclaimIndex) -> t.reclaimIndex_.LoadAcquire()
    atomic.Store64(&t.reclaimIndex, v) -> t.reclaimIndex_.Store(v)
    atomic.StoreRel64(&t.reclaimIndex, v) -> t.reclaimIndex_.StoreRelease(v)
    atomic.Cas64(&t.reclaimIndex, v, w) -> t.reclaimIndex_.CompareAndSwap(v, w)
    atomic.Xchg64(&t.reclaimIndex, v) -> t.reclaimIndex_.Swap(v)
    atomic.Xadd64(&t.reclaimIndex, d) -> t.reclaimIndex_.Add(d)
  }
  rm mheap.reclaimIndex
  mv mheap.reclaimIndex_ mheap.reclaimIndex
'
mv export.go export_test.go

Change-Id: I1d619e3ac032285b5f7eb6c563a5188c8e36d089
Reviewed-on: https://go-review.googlesource.com/c/go/+/356711
Reviewed-by: Austin Clements <austin@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
2021-10-20 20:39:33 +00:00
Michael Anthony Knyszek
1dff8f0a05 runtime: retype mheap.pagesSweptBasis as atomic.Uint64
[git-generate]
cd src/runtime
mv export_test.go export.go
GOROOT=$(dirname $(dirname $PWD)) rf '
  add mheap.pagesSweptBasis pagesSweptBasis_ atomic.Uint64 // pagesSwept to use as the origin of the sweep ratio
  ex {
    import "runtime/internal/atomic"

    var t mheap
    var v, w uint64
    var d int64

    t.pagesSweptBasis -> t.pagesSweptBasis_.Load()
    t.pagesSweptBasis = v -> t.pagesSweptBasis_.Store(v)
    atomic.Load64(&t.pagesSweptBasis) -> t.pagesSweptBasis_.Load()
    atomic.LoadAcq64(&t.pagesSweptBasis) -> t.pagesSweptBasis_.LoadAcquire()
    atomic.Store64(&t.pagesSweptBasis, v) -> t.pagesSweptBasis_.Store(v)
    atomic.StoreRel64(&t.pagesSweptBasis, v) -> t.pagesSweptBasis_.StoreRelease(v)
    atomic.Cas64(&t.pagesSweptBasis, v, w) -> t.pagesSweptBasis_.CompareAndSwap(v, w)
    atomic.Xchg64(&t.pagesSweptBasis, v) -> t.pagesSweptBasis_.Swap(v)
    atomic.Xadd64(&t.pagesSweptBasis, d) -> t.pagesSweptBasis_.Add(d)
  }
  rm mheap.pagesSweptBasis
  mv mheap.pagesSweptBasis_ mheap.pagesSweptBasis
'
mv export.go export_test.go

Change-Id: Id9438184b9bd06d96894c02376385bad45dee154
Reviewed-on: https://go-review.googlesource.com/c/go/+/356710
Reviewed-by: Austin Clements <austin@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
2021-10-20 20:39:29 +00:00
Michael Anthony Knyszek
e90492882a runtime: retype mheap.pagesSwept as atomic.Uint64
[git-generate]
cd src/runtime
mv export_test.go export.go
GOROOT=$(dirname $(dirname $PWD)) rf '
  add mheap.pagesSwept pagesSwept_ atomic.Uint64 // pages swept this cycle
  ex {
    import "runtime/internal/atomic"

    var t mheap
    var v, w uint64
    var d int64

    t.pagesSwept -> t.pagesSwept_.Load()
    t.pagesSwept = v -> t.pagesSwept_.Store(v)
    atomic.Load64(&t.pagesSwept) -> t.pagesSwept_.Load()
    atomic.LoadAcq64(&t.pagesSwept) -> t.pagesSwept_.LoadAcquire()
    atomic.Store64(&t.pagesSwept, v) -> t.pagesSwept_.Store(v)
    atomic.StoreRel64(&t.pagesSwept, v) -> t.pagesSwept_.StoreRelease(v)
    atomic.Cas64(&t.pagesSwept, v, w) -> t.pagesSwept_.CompareAndSwap(v, w)
    atomic.Xchg64(&t.pagesSwept, v) -> t.pagesSwept_.Swap(v)
    atomic.Xadd64(&t.pagesSwept, d) -> t.pagesSwept_.Add(d)
  }
  rm mheap.pagesSwept
  mv mheap.pagesSwept_ mheap.pagesSwept
'
mv export.go export_test.go

Change-Id: Ife99893d90a339655f604bc3a64ee3decec645ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/356709
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-10-20 20:39:25 +00:00
Michael Anthony Knyszek
d419a80bc7 runtime: retype mheap.pagesInUse as atomic.Uint64
[git-generate]
cd src/runtime
mv export_test.go export.go
GOROOT=$(dirname $(dirname $PWD)) rf '
  add mheap.pagesInUse \
// Proportional sweep \
// \
// These parameters represent a linear function from gcController.heapLive \
// to page sweep count. The proportional sweep system works to \
// stay in the black by keeping the current page sweep count \
// above this line at the current gcController.heapLive. \
// \
// The line has slope sweepPagesPerByte and passes through a \
// basis point at (sweepHeapLiveBasis, pagesSweptBasis). At \
// any given time, the system is at (gcController.heapLive, \
// pagesSwept) in this space. \
// \
// It is important that the line pass through a point we \
// control rather than simply starting at a 0,0 origin \
// because that lets us adjust sweep pacing at any time while \
// accounting for current progress. If we could only adjust \
// the slope, it would create a discontinuity in debt if any \
// progress has already been made. \
pagesInUse_ atomic.Uint64 // pages of spans in stats mSpanInUse
  ex {
    import "runtime/internal/atomic"

    var t mheap
    var v, w uint64
    var d int64

    t.pagesInUse -> t.pagesInUse_.Load()
    t.pagesInUse = v -> t.pagesInUse_.Store(v)
    atomic.Load64(&t.pagesInUse) -> t.pagesInUse_.Load()
    atomic.LoadAcq64(&t.pagesInUse) -> t.pagesInUse_.LoadAcquire()
    atomic.Store64(&t.pagesInUse, v) -> t.pagesInUse_.Store(v)
    atomic.StoreRel64(&t.pagesInUse, v) -> t.pagesInUse_.StoreRelease(v)
    atomic.Cas64(&t.pagesInUse, v, w) -> t.pagesInUse_.CompareAndSwap(v, w)
    atomic.Xchg64(&t.pagesInUse, v) -> t.pagesInUse_.Swap(v)
    atomic.Xadd64(&t.pagesInUse, d) -> t.pagesInUse_.Add(d)
  }
  rm mheap.pagesInUse
  mv mheap.pagesInUse_ mheap.pagesInUse
'
mv export.go export_test.go

Change-Id: I495d188683dba0778518563c46755b5ad43be298
Reviewed-on: https://go-review.googlesource.com/c/go/+/356549
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-10-20 20:39:19 +00:00
Michael Anthony Knyszek
75b73d68b3 runtime: use atomic.Float64 for assist ratio
Change-Id: Ie7f09a7c9545ef9dd1860b1e332c4edbcbf8165e
Reviewed-on: https://go-review.googlesource.com/c/go/+/356170
Reviewed-by: Austin Clements <austin@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
2021-10-20 20:38:59 +00:00
Michael Anthony Knyszek
3ec8d4b5ed runtime/internal/atomic: add atomic types for all functions
Change-Id: I74f365316484feb819c31c77fbffd78fadfe32a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/356169
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2021-10-20 20:38:47 +00:00
Robert Griesemer
3ff39c5eda cmd/compile/internal/types2: use correct types when checking generic conversions
Iterate through the actual, possibly defined types of constraints
when type-checking generic conversions, not the underlying types.

For #47150.

Change-Id: Ia7af313bf46d6f6b0ad5292ff793b030b8e2d3d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/357333
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-20 19:30:13 +00:00
Robert Findley
4320949f36 go/internal/gcimporter: avoid setting unnecessary lines in fakeFileSet
This is a clean port of CL 357291 from x/tools.

For #46586

Change-Id: Ib22087ae7fe8477d368acd230b263b83cdad4d36
Reviewed-on: https://go-review.googlesource.com/c/go/+/357429
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-20 19:29:12 +00:00
Cuong Manh Le
4e565f7372 cmd/compile: fix crawling of embeddable types during inline
In CL 327872, there's a fix for crawling of embeddable types directly
reached by the user, so all of its methods need to be re-exported. But
we missed the cased when an un-exported type may be reachable by
embedding in exported type. Example:

	type t struct {}
	func (t) M() {}

	func F() interface{} { return struct{ t }{} }

We generate the wrapper for "struct{ t }".M, and when inlining call to
"struct{ t }".M makes "t.M" reachable.

It works well, and only be revealed in CL 327871, when we changed
methodWrapper to always call inline.InlineCalls, thus causes the crash
in #49016, which involve dot type in inlined function.

Fixes #49016

Change-Id: If174fa5575132da5cf60e4bd052f7011c4e76c5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/356254
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-10-20 17:26:58 +00:00
Than McIntosh
27a1454ee0 cmd/internal/goobj: minor dead code cleanup
Remove a bit of dead code from the Go object file reader (io.ReaderAt
no longer needed in goobj.Reader).

Change-Id: I04150d37fb90b59c9dbe930878d4dd21cdcd7ca7
Reviewed-on: https://go-review.googlesource.com/c/go/+/357309
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2021-10-20 15:03:54 +00:00
andig
d2ec73c1bf math/big: remove stray whitespace in addMulVVW on amd64
Minor leftover from CL 74851.

Change-Id: I1b56afcde3c505ba77a0f79e8ae9b01000362298
GitHub-Last-Rev: 87e97571a5
GitHub-Pull-Request: golang/go#48942
Reviewed-on: https://go-review.googlesource.com/c/go/+/355629
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Alexander Rakoczy <alex@golang.org>
2021-10-20 07:49:28 +00:00
Alexander Yastrebov
d9421cec00 net/http/internal: return unexpected EOF on incomplete chunk read
Fixes #48861

Change-Id: I3f55bfbdc4f2cf5b33d1ab2d76e01335bb497c6f
GitHub-Last-Rev: 0ecd790b87
GitHub-Pull-Request: golang/go#48903
Reviewed-on: https://go-review.googlesource.com/c/go/+/355029
Trust: Damien Neil <dneil@google.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2021-10-20 07:21:22 +00:00
Cuong Manh Le
b091189762 cmd/compile/internal/types2: print assignment operation for invalid operation errors
When invoking check.binary for assignment operation, the expression will
be nil, thus for printing the assignment operation error message, we
need to reconstruct the statement from lhs, op, rhs.

Fixes #48472

Change-Id: Ie38c3dd8069b47e508968d6e43cedcf7536559ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/357229
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-10-20 05:28:45 +00:00
Robert Griesemer
4cc6a91907 cmd/compile/internal/types2: implement generic conversions
Fixes #47150.

Change-Id: I7531ca5917d4e52ca0b9211d6f2114495b19ba09
Reviewed-on: https://go-review.googlesource.com/c/go/+/356010
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-20 00:05:22 +00:00
Keith Randall
2be5b84665 cmd/compile: allow importing and exporting of ODYNAMICTYPE
Change-Id: I2fca7a801c85ed93c002c23bfcb0cf9593f1bdf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/356571
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-19 22:47:48 +00:00
Keith Randall
9fa85518ff cmd/compile: substitute "". prefix with package in more import locations
The "" stand-in for the current package needs to be substituted
in more places when importing, because of generics.

""..dict.conv4["".MyString]

when imported in main and then exported, this becomes

a..dict.conv4["".MyString]

and then the linker makes that into

a..dict.conv4[main.MyString]

Which isn't correct. We need to replace on import not just
function names, but also globals, which this CL does.

Change-Id: Ia04a23b5ffd60aeeaba72c807f69261105670f8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/356570
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-19 22:47:35 +00:00
Robert Griesemer
1b24c9e42e go/types, types2: always accept type parameters when running Manual test
This makes it easier to run tests on existing generic code that is
not using the `.go2` ending currently used by type checker tests.

For #49074.

Change-Id: I1501463c55dbe1d709918786e1a43b6d1bf1629a
Reviewed-on: https://go-review.googlesource.com/c/go/+/357050
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-19 21:05:11 +00:00
Cuong Manh Le
07e5527249 reflect: fix methodValueCall code pointer mismatch in Value.Pointer
This is the port of CL 356809 for Value.Pointer to fix the mismatch of
methodValueCall code pointer.

Change-Id: I080ac41b94b44d878cd5896207a76a28c57fd48b
Reviewed-on: https://go-review.googlesource.com/c/go/+/356950
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-19 18:56:08 +00:00
Cuong Manh Le
d7149e502d reflect: restore Value.Pointer implementation
CL 350691 added Value.UnsafePointer and make Value.Pointer call it
internally. It has a downside that Value.Pointer can now eligible to be
inlined, thus making un-intentional side effect, like the test in
fixedbugs/issue15329.go becomes flaky.

This CL restore Value.Pointer original implementation, pre CL 350691,
with the deprecation TODO removed.

Fixes #49067

Change-Id: I735af182f8e729294333ca906ffc062f477cfc99
Reviewed-on: https://go-review.googlesource.com/c/go/+/356949
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-19 18:55:51 +00:00
Michael Matloob
d94498470b cmd/go: add GOWORK to go env command
GOWORK will be set to the go.work file's path, if in workspace mode
or will be empty otherwise.

For #45713
Fixes #48589

Change-Id: I163ffaf274e0a41469c1f3b8514d6f90e20423b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/355689
Trust: Michael Matloob <matloob@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-19 18:43:12 +00:00
Michael Matloob
1d63052782 cmd/go: support replaces in the go.work file
Add support for replace directives in the go.work file. If there are
conflicting replaces in go.mod files, suggest that users add an
overriding replace in the go.work file.

Add HighestReplaced to MainModules so that it accounts for the
replacements in the go.work file.

(Reviewers: I'm not totally sure that HighestReplace is computed
correctly. Could you take a closer look at that?)

For #45713

Change-Id: I1d789219ca1dd065ba009ce5d38db9a1fc38ba83
Reviewed-on: https://go-review.googlesource.com/c/go/+/352812
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-19 18:43:08 +00:00
Matt T. Proud
7999fd4710 errors: mention Is methods should not call Unwrap
errors.Is internally unwraps the error until the error matches the
target. Because of this, a user-authored Is method on an error type
need not call errors.Unwrap on itself or the target, because that would
make the unwrapping operation O(N^2). It is a subtle detail to remind
authors for resource efficiency reasons.

Change-Id: Ic1ba59a5bdbfe2c7cb51a2cba2537ab6de4a13ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/356789
Reviewed-by: Jean de Klerk <deklerk@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Trust: Jean de Klerk <deklerk@google.com>
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Jean de Klerk <deklerk@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-19 18:42:57 +00:00
Archana R
6c3cd5d2eb internal/bytealg: port bytes.Index and bytes.Count to reg ABI on ppc64x
This change adds support for the reg ABI to the Index and Count
functions for ppc64/ppc64le.

Most Index and Count benchmarks show improvement in performance on
POWER9 with this change. Similar numbers observed on POWER8 and POWER10.

name                             old time/op    new time/op    delta
Index/32                         71.0ns ± 0%    67.9ns ± 0%   -4.42% (p=0.001 n=7+6)
IndexEasy/10                     17.5ns ± 0%    17.2ns ± 0%   -1.30% (p=0.001 n=7+7)

name             old time/op    new time/op    delta
Count/10           26.6ns ± 0%    25.0ns ± 1%   -6.02%  (p=0.001 n=7+7)
Count/32           78.6ns ± 0%    74.7ns ± 0%   -4.97%  (p=0.001 n=7+7)
Count/4K           5.03µs ± 0%    5.03µs ± 0%   -0.07%  (p=0.000 n=6+7)
CountEasy/10       26.9ns ± 0%    25.2ns ± 1%   -6.31%  (p=0.001 n=7+7)
CountSingle/32     11.8ns ± 0%     9.9ns ± 0%  -15.70%  (p=0.002 n=6+6)

Change-Id: Ibd146c04f8107291c55f9e6100b8264dfccc41ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/355509
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-19 18:22:59 +00:00
Carlo Alberto Ferraris
ad7db1f90f sync: avoid a dynamic check in WaitGroup on 64-bit architectures
uint64 is guaranteed by the compiler to be aligned on 64-bit archs.
By using uint64+uint32 instead of [3]uint32 we can make use of the
guaranteed alignment to avoid the run-time alignment check.

On linux/amd64:

name                     old time/op    new time/op    delta
WaitGroupUncontended-4     8.84ns ± 3%    7.62ns ± 4%  -13.72%  (p=0.000 n=17+18)
WaitGroupAddDone-4         66.8ns ± 3%    45.9ns ± 2%  -31.31%  (p=0.000 n=20+18)
WaitGroupAddDoneWork-4     79.2ns ± 1%    56.6ns ± 1%  -28.54%  (p=0.000 n=17+20)
WaitGroupWait-4            2.83ns ± 2%    2.58ns ± 2%   -9.05%  (p=0.000 n=18+20)
WaitGroupWaitWork-4        16.8ns ± 6%    16.5ns ± 6%     ~     (p=0.072 n=20+18)
WaitGroupActuallyWait-4     263ns ± 2%     261ns ± 5%     ~     (p=0.063 n=18+20)

Change-Id: I314340f2ed8a47d8b9c15f8a3b07e41f252f4831
Reviewed-on: https://go-review.googlesource.com/c/go/+/189837
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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2021-10-19 18:21:38 +00:00
Katie Hockman
982060203c testing: don't allow f.Log/Logf or f.Skipped inside f.Fuzz
This change also does some refactors around how
we prevent many (*F) methods from being called
inside (*F).Fuzz. Previously, there was a lot of
comment/code duplication, which was going to be
difficult to maintain and brittle. The refactor
lessens this duplication.

Previously, the methods Log, Logf, Failed, Name and
Skipped were the only (*common) methods that were
allowed to be called inside (*F).Fuzz. After this
change, Failed and Name are still allowed, but
Log, Logf, and Skipped are not (t.Log, t.Logf, or
t.Skipped should be used instead).

Fixes #48988

Change-Id: I4066247d551ea1908e8a2ca2889509fc68e3bb44
Reviewed-on: https://go-review.googlesource.com/c/go/+/356151
Trust: Katie Hockman <katie@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2021-10-19 18:18:37 +00:00