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Commit Graph

47088 Commits

Author SHA1 Message Date
David Carlier
cf59850466 crypto/rand: supports for getrandom syscall in DragonFlyBSD
Since the 5.7 release, DragonFlyBSD supports as well
the getrandom function, the actual stable is 5.8.

Change-Id: I2b8fc468771b10ac12b38ea7e8e5314342de6375
GitHub-Last-Rev: c5c496f418
GitHub-Pull-Request: golang/go#42617
Reviewed-on: https://go-review.googlesource.com/c/go/+/269999
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2021-03-10 09:01:05 +00:00
fanzha02
4d608eb224 testing: fix typo in a comment
Change-Id: I781808327be84113cd55c52bc214b821cd166114
Reviewed-on: https://go-review.googlesource.com/c/go/+/300269
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-03-10 04:06:13 +00:00
Andy Pan
643d240a11 internal/poll: implement a pipe pool for splice() call
In scenarios where splice() is called, splice() is usually called not just once, but many times,
which means that a lot of pipes will be created and destroyed frequently, costing an amount of system resources
and slowing down performance, thus I suggest that we add a pipe pool for reusing pipes.

Benchmark tests:

goos: linux
goarch: amd64
pkg: internal/poll
cpu: AMD EPYC 7K62 48-Core Processor

name                  old time/op    new time/op    delta
SplicePipe-8            1.36µs ± 1%    0.02µs ± 0%   -98.57%  (p=0.001 n=7+7)
SplicePipeParallel-8     747ns ± 4%       4ns ± 0%   -99.41%  (p=0.001 n=7+7)

name                  old alloc/op   new alloc/op   delta
SplicePipe-8             24.0B ± 0%      0.0B       -100.00%  (p=0.001 n=7+7)
SplicePipeParallel-8     24.0B ± 0%      0.0B       -100.00%  (p=0.001 n=7+7)

name                  old allocs/op  new allocs/op  delta
SplicePipe-8              1.00 ± 0%      0.00       -100.00%  (p=0.001 n=7+7)
SplicePipeParallel-8      1.00 ± 0%      0.00       -100.00%  (p=0.001 n=7+7)

Fixes #42740

Change-Id: Idff654b7264342084e089b5ba796c87c380c471b
Reviewed-on: https://go-review.googlesource.com/c/go/+/271537
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
2021-03-10 03:52:48 +00:00
Bryan C. Mills
d33e2192a7 cmd/go: allow '+' in package import paths in module mode
This change upgrades x/mod to pull in the fix from CL 300149.

Fixes #44776.

Change-Id: I273f41df2abfff76d91315b7f19fce851c8770d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/300176
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-10 03:08:37 +00:00
Robert Griesemer
41245ab283 cmd/compile/internal/types2: remove concept of finals
This is a 1:1 port of the respective change in go/types
in https://golang.org/cl/299590.

Change-Id: I65ad723f2e21e3d95fc0b94665e0121e31871a48
Reviewed-on: https://go-review.googlesource.com/c/go/+/300250
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>
2021-03-10 01:46:25 +00:00
Robert Griesemer
acd7cb5887 cmd/compile/internal/types2: better error reporting framework (starting point)
Until now, errors which came with additional details (e.g., a declaration
cycle error followed by the list of objects involved in the cycle, one per
line) were reported as an ordinary error followed by "secondary" errors,
with the secondary errors marked as such by having a tab-indented error
message.

This approach often required clients to filter these secondary errors
(as they are not new errors, they are just clarifying a previously
reported error).

This CL introduces a new internal error_ type which permits accumulating
various error information that may then be reported as a single error.

Change-Id: I25b2f094facd37e12737e517f7ef8853d465ff77
Reviewed-on: https://go-review.googlesource.com/c/go/+/296689
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-03-10 00:50:17 +00:00
Rob Findley
142a76530c go/types: improve the positioning of broken import errors
The heuristic gopls uses to guess error spans can get tripped-up on
certain valid characters in an import path (for example '-').

Update the error for broken imports to capture the full import path
span, so that gopls doesn't need to rely on heuristics.

Change-Id: Ieb8e0dce11933643f701b32271ff5f3477fecaaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/300169
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>
2021-03-09 22:00:50 +00:00
Paul E. Murphy
48ddf70128 cmd/asm,cmd/compile: support 5 operand RLWNM/RLWMI on ppc64
These instructions are actually 5 argument opcodes as specified
by the ISA.  Prior to this patch, the MB and ME arguments were
merged into a single bitmask operand to workaround the limitations
of the ppc64 assembler backend.

This limitation no longer exists. Thus, we can pass operands for
these opcodes without having to merge the MB and ME arguments in
the assembler frontend or compiler backend.

Likewise, support for 4 operand variants is unchanged.

Change-Id: Ib086774f3581edeaadfd2190d652aaaa8a90daeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/298750
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
Trust: Carlos Eduardo Seo <carlos.seo@linaro.org>
2021-03-09 20:35:41 +00:00
Brad Fitzpatrick
18510ae88f runtime, cmd/link/internal/ld: disable memory profiling when data unreachable
If runtime.MemProfile is unreachable, default to not collecting any
memory profiling samples, to save memory on the hash table.

Fixes #42347

Change-Id: I9a4894a5fc77035fe59b1842e1ec77a1182e70c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/299671
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Keith Randall <khr@golang.org>
2021-03-09 20:09:52 +00:00
Fazlul Shahriar
e4f3cfadf6 net: don't append a dot to TXT records on Plan 9
TXT records are not domain names, so no need to call absDomainName.
The output now matches the pure Go resolver.

Fixes #44619

Change-Id: I1ebf09152ff5c0446d2e2b4c26671358892d9dc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/296589
Reviewed-by: David du Colombier <0intro@gmail.com>
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: David du Colombier <0intro@gmail.com>
Trust: Ian Lance Taylor <iant@golang.org>
2021-03-09 19:25:34 +00:00
David Chase
382851c1fd cmd/compile: fix failure to communicate between ABIinfo producer&consumer
ABI info producer and consumer had different ideas for register
order for parameters.

Includes a test, includes improvements to debugging output.

Updates #44816.

Change-Id: I4812976f7a6c08d6fc02aac1ec0544b1f141cca6
Reviewed-on: https://go-review.googlesource.com/c/go/+/299570
Trust: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-03-09 18:45:05 +00:00
David Chase
9f5298ca6e cmd/compile: fix confusion in generating SelectN index
Old: return the ABI register index of the result (wrong!)
New: return the index w/in sequence of result registers (right!)

Fixed bug:
genCaller0/genCaller0.go:43:9: internal compiler error: 'Caller0':
   panic during schedule while compiling Caller0:
runtime error: index out of range [10] with length 9

Updates #44816.

Change-Id: I1111e283658a2d6422986ae3d61bd95d1b9bde5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/299549
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-09 18:44:55 +00:00
David Chase
98dfdc82c8 cmd/compile: fix broken type+offset calc for register args
Includes more enhancements to debugging output.

Updates #44816.

Change-Id: I5b21815cf37ed21e7dec6c06f538090f32260203
Reviewed-on: https://go-review.googlesource.com/c/go/+/299409
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-09 18:44:23 +00:00
David Chase
5eb9912084 cmd/compile: fix OpArg decomposer for registers in expandCalls
Includes test taken from
https://github.com/golang/go/issues/44816#issuecomment-791618179
and improved debugging output.

Updates #44816

Change-Id: I94aeb9c5255f175fe80727be29d218bad54bf7ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/299389
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-09 18:43:58 +00:00
Keith Randall
48895d021b cmd/compile: remove skipping of implicit operations during export
We'll need to attach types to these operations, so we need to
represent them in the import/export data.

Some of the operations use a selector indicating a different package,
so we need to provide an option to encode the package of a selector.
The default selector() function can't encode that extra information,
as selector's exact encoding is used by go/types.

Change-Id: I4c110fe347b3d915f88a722834bc4058baea7854
Reviewed-on: https://go-review.googlesource.com/c/go/+/299771
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-03-09 18:35:29 +00:00
Keith Randall
b6df58bd1f cmd/compile: detect duplicate importing earlier
Change-Id: I05ba944e189a884b727e40a9526d212612c3e923
Reviewed-on: https://go-review.googlesource.com/c/go/+/299770
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-03-09 18:33:42 +00:00
Michael Pratt
e8e425cb23 runtime: add pollDesc partial edges
gscan is taken during stack growth, which may occur while pollDesc is
held.

mallocgc may also be called while pollDesc is held. mallocgc may take
mheap or mheapSpecial. The former exists, but is out of order; the
latter is missing.

Fixes #44881

Change-Id: Ie25935d9d433e813c11a528ee47255b317a09f41
Reviewed-on: https://go-review.googlesource.com/c/go/+/300009
Trust: Michael Pratt <mpratt@google.com>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
2021-03-09 18:26:24 +00:00
Keith Randall
b60a3a8cfb cmd/compile: add debugging mode for import/export
Just add a simple magic number with each op, to detect when
the reader gets desynchronized from the writer.

Change-Id: Iac7dab7f465b0021b1d7ae31c8f8a353ac3663a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/299769
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-03-09 17:51:10 +00:00
Dan Scales
a70eb2c9f2 cmd/compile: get instantiated generic types working with interfaces
Get instantiatiated generic types working with interfaces, including
typechecking assignments to interfaces and instantiating all the methods
properly. To get it all working, this change includes:

 - Add support for substituting in interfaces in subster.typ()

 - Fill in the info for the methods for all instantiated generic types,
   so those methods will be available for later typechecking (by the old
   typechecker) when assigning an instantiated generic type to an
   interface. We also want those methods available so we have the list
   when we want to instantiate all methods of an instantiated type. We
   have both for instantiated types encountered during the initial noder
   phase, and for instantiated types created during stenciling of a
   function/method.

 - When we first create a fully-instantiated generic type (whether
   during initial noder2 pass or while instantiating a method/function),
   add it to a list so that all of its methods will also be
   instantiated. This is needed so that an instantiated type can be
   assigned to an interface.

 - Properly substitute type names in the names of instantiated methods.

 - New accessor methods for types.Type.RParam.

 - To deal with generic types which are empty structs (or just don't use
   their type params anywhere), we want to set HasTParam if a named type
   has any type params that are not fully instantiated, even if the
   type param is not used in the type.

 - In subst.typ() and elsewhere, always set sym.Def for a new forwarding
   type we are creating, so we always create a single unique type for
   each generic type instantiation. This handles recursion within a
   type, and also recursive relationships across many types or methods.
   We remove the seen[] hashtable, which was serving the same purpose,
   but for subst.typ() only. We now handle all kinds of recursive types.

 - We don't seem to need to force types.CheckSize() on
   created/substituted generic types anymore, so commented out for now.

 - Add an RParams accessor to types2.Signature, and also a new
   exported types2.AsSignature() function.

Change-Id: If6c5dd98427b20bfe9de3379cc16f83df9c9b632
Reviewed-on: https://go-review.googlesource.com/c/go/+/298449
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-03-09 16:37:52 +00:00
Tobias Klauser
034fffdb49 net: use io.Discard in TestSendfileOnWriteTimeoutExceeded
Replace ioutil.Discard which is deprecated as of Go 1.16.

This was already done in CL 263142 but accidentially re-introduced in
CL 285914.

Change-Id: Ife0944d416294b1ba7c8f6b602aa68a3b9213c50
Reviewed-on: https://go-review.googlesource.com/c/go/+/299989
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-09 10:37:50 +00:00
Brad Fitzpatrick
762ef81a56 cmd/link/internal/ld: deflake TestWindowsIssue36495
Over a dozen of the ld tests were missing closes. That was less
obvious before CL 299670 started using T.TempDir instead, which fails
a test when the tempdir can't be cleaned up (as it can't on Windows
when things are still open), insteading of leaving tempdirs around on
disk after the test.

Most of the missing closes were fixed in CL 299670, but the builders
helpfully pointed out that I missed at least this one.

Change-Id: I35f695bb7cbfba31e16311c5af965c148f9d7943
Reviewed-on: https://go-review.googlesource.com/c/go/+/299929
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Dan Scales <danscales@google.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
2021-03-09 10:12:02 +00:00
Alberto Donizetti
b70a2bc9c6 cmd/compile: make ValAndOff.{Val,Off} return an int32
The ValAndOff type is a 64bit integer holding a 32bit value and a
32bit offset in each half, but for historical reasons its Val and Off
methods returned an int64. This was convenient when AuxInt was always
an int64, but now that AuxInts are typed we can return int32 from Val
and Off and get rid of a several casts and now unnecessary range
checks.

This change:

- changes the Val and Off methods to return an int32 (from int64);
- adds Val64 and Off64 methods for convenience in the few remaining
  places (in the ssa.go files) where Val and Off are stored in int64
  fields;
- deletes makeValAndOff64, renames makeValAndOff32 to makeValAndOff
- deletes a few ValAndOff methods that are now unused;
- removes several validOff/validValAndOff check that will always
  return true.

Passes:

  GOARCH=amd64 gotip build -toolexec 'toolstash -cmp' -a std
  GOARCH=386 gotip build -toolexec 'toolstash -cmp' -a std
  GOARCH=s390x gotip build -toolexec 'toolstash -cmp' -a std

(the three GOARCHs with SSA rules files impacted by the change).

Change-Id: I2abbbf42188c798631b94d3a55ca44256f140be7
Reviewed-on: https://go-review.googlesource.com/c/go/+/299149
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-03-09 08:19:14 +00:00
Tobias Klauser
437d229e2a runtime: document netpollclose
Document that network poller implementations need to define
netpollclose.

Change-Id: Idc73dea7cfd503d4de7e1d95902f0f102cf5ed8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/297809
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-03-09 07:44:18 +00:00
eric fang
618b66e16d cmd/compile: remove 4-byte alignment requirement of stack slot on arm
This CL applies CL 267999 to arm.

Updates #42385

Change-Id: Iad82aafcb7b0a5a77a4bea32f648320f57a17cdd
Reviewed-on: https://go-review.googlesource.com/c/go/+/297773
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: eric fang <eric.fang@arm.com>
Run-TryBot: eric fang <eric.fang@arm.com>
2021-03-09 02:20:55 +00:00
Emmanuel T Odeke
b6def6a34e cmd/vet: bring in sigchanyzer to report unbuffered channels to signal.Notify
Brings in the static analyzer "sigchanyzer", that we created at
Orijtech, Inc, and already submitted in CL 274352, as

    golang.org/x/tools/go/analysis/passes/sigchanyzer

and add it to cmd/vet as one of the passes.

Fixes #9399

Change-Id: I83708b8ea5ca8ede5ee31efab55cbce7419434ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/299532
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Bryan C. Mills <bcmills@google.com>
2021-03-08 23:13:52 +00:00
Ian Lance Taylor
a08adda12c os/signal: remove comments about SA_RESTART
It's no longer necessary for non-Go signal handlers to use SA_RESTART.

For #20400
Fixes #44761

Change-Id: Ie3c7fecc631a4a2822331754296ea09b308e1391
Reviewed-on: https://go-review.googlesource.com/c/go/+/298269
Trust: Ian Lance Taylor <iant@golang.org>
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2021-03-08 20:41:06 +00:00
Brad Fitzpatrick
bd37284784 cmd/link: use testing.T.TempDir in tests
Change-Id: I6fc8c9ee6d2246bfd874eb58b411e34ddbeaf723
Reviewed-on: https://go-review.googlesource.com/c/go/+/299670
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-03-08 20:03:01 +00:00
Cuong Manh Le
fee3cd4250 cmd/compile: fix width not calculated for imported type
The compiler currently has problem that some imported type is missing
size calculation. The problem is not triggered until CL 283313 merged,
due to the compiler can compile the functions immediately when it sees
them, so during SSA generation, size calculation is still ok.

CL 283313 makes the compiler always push functions to compile queue,
then drain from it for compiling function. During this process, the
types calculation size is disabled, so calculating size during SSA now
make the compiler crashes.

To fix this, we can just always calculate type size during typechecking,
when importing type from other packages.

Fixes #44732

Change-Id: I8d00ea0b5aadd432154908280e55d85c75f3ce92
Reviewed-on: https://go-review.googlesource.com/c/go/+/299689
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: Dan Scales <danscales@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-03-08 19:43:19 +00:00
Brad Fitzpatrick
7419a86c82 cmd/link/internal/ld: fix typo in a comment
Change-Id: I6d0fafd38f0ad9392f163a9d8cd94d103bf2a059
Reviewed-on: https://go-review.googlesource.com/c/go/+/299669
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-08 19:07:25 +00:00
Josh Bleecher Snyder
b4787201c9 cmd/compile: minor doc improvements
These are left over from comments I failed to leave on CL 249463;
apparently I never hit "Reply".

Change-Id: Ia3f8a900703c347f8f98581ec1ac172c0f72cd9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/299589
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-03-08 18:56:25 +00:00
Emmanuel T Odeke
aafad20b61 encoding/binary: limit bytes read by Uvarint to <= 10
Limits the number of bytes that can be consumed by Uvarint
to MaxVarintLen64 (10) to avoid wasted computations.
With this change, if Uvarint reads more than MaxVarintLen64
bytes, it'll return the erroring byte count of n=-(MaxVarintLen64+1)
which is -11, as per the function signature.

Updated some tests to reflect the new change in expectations of n
when the number of bytes to be read exceeds the limits..

Fixes #41185

Change-Id: Ie346457b1ddb0214b60c72e81128e24d604d083d
Reviewed-on: https://go-review.googlesource.com/c/go/+/299531
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
2021-03-08 18:49:14 +00:00
Joel Sing
125eca0f72 cmd/compile: improve IsNonNil rule on riscv64
IsNonNil is readily implemented using SNEZ on riscv64, removing over 8,000
instructions from the go binary. Other rules will improve on this sequence,
however in this case it makes sense to use a direct simplification.

Change-Id: Ib4068599532398afcd05f51d160673ef5fb5e5a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/299230
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Michael Munday <mike.munday@lowrisc.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-08 03:23:21 +00:00
Matthew Dempsky
597b5d192e cmd/compile: rename internal-abi.md to abi-internal.md
Allows muscle-memoried tab completion of cmd/compile/internal/...
paths to work again.

Change-Id: Ib54a5f2cc9fabcb876c2e62635828ab28b565501
Reviewed-on: https://go-review.googlesource.com/c/go/+/299530
Reviewed-by: Austin Clements <austin@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>
2021-03-07 23:58:09 +00:00
Josh Bleecher Snyder
b0df92703c math/big: add shrVU and shlVU benchmarks
Change-Id: Id67d6ac856bd9271de99c3381bde910aa0c166e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/296011
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-03-07 23:02:35 +00:00
Cherry Zhang
414fa8c35e cmd/internal/objabi: use a separate bit to mark weak relocation
Instead of using two relocation types R_XXX and R_WEAKXXX, use a
separate bit, R_WEAK, to mark weak relocations. This makes it
easier to add more weak relocation types.

Change-Id: Iec4195c2aefa65f59e464c83018246e17cd08173
Reviewed-on: https://go-review.googlesource.com/c/go/+/268478
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-03-05 23:58:34 +00:00
Roger Peppe
009bfeae86 reflect: add VisibleFields function
When writing code that reflects over a struct type, it's a common requirement to know the full set of struct fields, including fields available due to embedding of anonymous members while excluding fields that are erased because they're at the same level as another field with the same name.

The logic to do this is not that complex, but it's a little subtle and easy to get wrong.

This CL adds a new `VisibleFields` function to the reflect package that returns the full set of effective fields that apply in a given struct type.

Performance isn't a prime consideration, as it's common to cache results by type.

Fixes #42782

Change-Id: I7f1af76cecff9b8a2490f17eec058826e396f660
Reviewed-on: https://go-review.googlesource.com/c/go/+/281233
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-03-05 23:47:39 +00:00
Cherry Zhang
f901ea701d cmd/internal/goobj: store relocation type as uint16
Currently, relocation type is stored as uint8 in object files, as
Go relocations do not exceed 255. In the linker, however, it is
used as a 16-bit type, because external relocations can exceed
255. The linker has to store the extra byte in a side table. This
complicates many things.

Just store it as uint16 in object files. This simplifies things,
with a small cost of increasing the object file sizes.

               before      after
hello.o         1672        1678
runtime.a    7927784     8056194

Change-Id: I313cf44ad0b8b3b76e35055ae55d911ff35e3158
Reviewed-on: https://go-review.googlesource.com/c/go/+/268477
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-03-05 23:34:43 +00:00
Cherry Zhang
87d29939c8 runtime: remove racefuncenterfp
No longer needed with previous CL.

Change-Id: I7c01f9e0e34ecb9553ef1b3d662f33419fd3a244
Reviewed-on: https://go-review.googlesource.com/c/go/+/297932
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-03-05 23:32:44 +00:00
Cherry Zhang
7205a4fbdc cmd/internal/goobj: regenerate builtin list
Change-Id: Ib8cb5f90e084838f00ecba78641bbb5d48ecac32
Reviewed-on: https://go-review.googlesource.com/c/go/+/297931
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-03-05 23:32:34 +00:00
Cherry Zhang
fb03be9d55 cmd/compile: use getcallersp for gorecover "fp" arg
Currently, the compiler synthesize a special ".fp" node, which
points to the FP of the current frame, be to used to call
gorecover. Later that node turns to an Arg in SSA that is not
really an arg, causing problems for the new ABI work which changes
the handling of Args, so we have to special-case that node.

This CL changes the compiler to get the FP by using getcallersp,
which is an intrinsic in SSA and works on all platforms. As we
need the FP, not the caller SP, one drawback is that we have to
add FixedFrameSize for LR machines. But it does allow us to remove
that special node.

Change-Id: Ie721d51efca8116c9d23cc4f79738fffcf847df8
Reviewed-on: https://go-review.googlesource.com/c/go/+/297930
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-03-05 23:13:20 +00:00
Cherry Zhang
a22bd3dc73 cmd/compile: use getcallerpc for racefuncentry
Currently, when instrumenting for the race detector, the compiler
inserts racefuncentry/racefuncentryfp at the entry of instrumented
functions. racefuncentry takes the caller's PC. On AMD64, we synthesize
a node which points to -8(FP) which is where the return address is
stored. Later this node turns to a special Arg in SSA that is not
really an argument. This causes problems in the new ABI work so that
special node has to be special-cased.

This CL changes the special node to a call to getcallerpc, which lowers
to an intrinsic in SSA. This also unifies AMD64 code path and LR machine
code path, as getcallerpc works on all platforms.

Change-Id: I1377e140b91e0473cfcadfda221f26870c1b124d
Reviewed-on: https://go-review.googlesource.com/c/go/+/297929
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-03-05 22:42:10 +00:00
Cherry Zhang
a829114b21 cmd/compile: match Aux and AuxInt explicitly in store combining rule
CL 280456 introduced a new store combining rule. On the LHS some
of the Aux and AuxInt of the stores are not specified, therefore
ignored during the matching. The rule is only correct if they
match. This CL adds explict match.

TODO: maybe we want the rule matcher require Aux/AuxInt to be
always specified on the LHS (using _ to explicitly ignore)? Or
maybe we want it to match the zero value if not specified? The
current approach is error-prone.

Fixes #44823.

Change-Id: Ic12b4a0de63117f2f070039737f0c905f28561bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/299289
Trust: Cherry Zhang <cherryyz@google.com>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2021-03-05 22:14:48 +00:00
Michael Pratt
d85083911d runtime: encapsulate access to allgs
Correctly accessing allgs is a bit hairy. Some paths need to lock
allglock, some don't. Those that don't are safest using atomicAllG, but
usage is not consistent.

Rather than doing this ad-hoc, move all access* through forEachG /
forEachGRace, the locking and atomic versions, respectively. This will
make it easier to ensure safe access.

* markroot is the only exception, as it has a far-removed guarantee of
safe access via an atomic load of allglen far before actual use.

Change-Id: Ie1c7a8243e155ae2b4bc3143577380c695680e89
Reviewed-on: https://go-review.googlesource.com/c/go/+/279994
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2021-03-05 22:09:52 +00:00
Kevin Burke
39bdd41d03 cmd/go/internal/modfetch/codehost: report git errors more accurately
Previously, if you attempted to fetch a private repository, or your
Git/curl client failed for an unknown reason, codehost would return an
UnknownRevisionError, which reported that a given revision in go.mod
was "unknown". This is confusing to many users who can go look in
their browser for example and see that the commit-ish exists.

Instead check whether "git ls-remote" exited with an error, and if so,
return that instead of the UnknownRevision message.

Fixes #42751.

Change-Id: I0dbded878b2818280e61126a4493767d719ad577
Reviewed-on: https://go-review.googlesource.com/c/go/+/297950
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-05 20:15:19 +00:00
Cuong Manh Le
44721f4565 test: enable "-d=panic" by default for errorcheck*
Fixes #43311

Change-Id: I134d6c0524c198998a3c093dd3a8144052e8f7a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/298715
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>
2021-03-05 18:47:16 +00:00
Cuong Manh Le
c082f9fee0 cmd/compile: do not set ONAME type when evaluated in type context
Updates #43311

Change-Id: I26e397d071b434256dab0cc7fff9d134b80bd6e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/298711
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>
2021-03-05 18:47:09 +00:00
Cuong Manh Le
fbee173545 cmd/compile: fix wrong condition in tcShift
CL 279442 refactored typecheck arithmetic operators, but using wrong
condition for checking invalid rhs.

Updates #43311

Change-Id: I7a03a5535b82ac4ea4806725776b0a4f7af1b79a
Reviewed-on: https://go-review.googlesource.com/c/go/+/298714
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>
2021-03-05 18:46:48 +00:00
Cuong Manh Le
9e6b1fcd0a cmd/compile: do not report error for invalid constant
Invalid constant was already reported by noder, so don't re-check in
typecheck, which lead to compiler crashing.

Updates #43311

Change-Id: I48e2f540601cef725c1ff628c066ed15d848e771
Reviewed-on: https://go-review.googlesource.com/c/go/+/298713
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>
2021-03-05 18:46:43 +00:00
Cuong Manh Le
51d8d351c1 cmd/compile: do not set type for OTYPESW
Same as CL 294031, but for OTYPESW.

Updates #43311

Change-Id: I996f5938835baff1d830c17ed75652315106bdfd
Reviewed-on: https://go-review.googlesource.com/c/go/+/298712
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>
2021-03-05 18:46:36 +00:00
Cuong Manh Le
80098ef00c cmd/compile: don't expand invalid embedded interface
The invalid interface type will be reported already, so don't expand
that invalid one, which causes the compiler crashes.

Updates #43311

Change-Id: Ic335cfa74f0b9fcfd0929dc5fd31d9156a8f5f5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/298710
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>
2021-03-05 18:46:16 +00:00