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Commit Graph

50234 Commits

Author SHA1 Message Date
Robert Griesemer
3f1b0ce6bb cmd/compile/internal/types2: clarify is/underIs semantics and implementation
The behavior of is/underIs was murky with the presence of a top type term
(corresponding to a type set that is not constrained by any types, yet the
function argument f of is/underIs was called with that term).

Change is/underIs to call f explicitly for existing specific type terms,
otherwise return the result of f(nil). Review all uses of is/underIs and
variants.

This makes the conversion code slightly more complicated because we need
to explicitly exclude type parameters without specific types; but the
code is clearer now.

Change-Id: I6115cb46f7f2a8d0f54799aafff9a67c4cca5e30
Reviewed-on: https://go-review.googlesource.com/c/go/+/358594
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-27 20:24:28 +00:00
Bryan C. Mills
68bd5121ee cmd/go: remove support for -buildmode=shared
It never worked in module mode (or with a read-only GOROOT).
A proposal to drop it was filed (and approved) in
https://golang.org/issue/47788.

Fixes #47788

Change-Id: I0c12f38eb0c5dfe9384fbdb49ed202301fa4273d
Reviewed-on: https://go-review.googlesource.com/c/go/+/359096
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-27 20:03:17 +00:00
Russ Cox
ffd2284db0 cmd/go: fix testdata/script/mod_vendor_goversion for new compiler output
The message is now a single line, but I couldn't get '\n?' to work.

(This test does not run in short mode.)

Change-Id: I3d7033f78ac2bf41db7fdfe96cbb988c4533d834
Reviewed-on: https://go-review.googlesource.com/c/go/+/359095
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-27 19:34:49 +00:00
Katie Hockman
514ebaec35 internal/fuzz: don't deflake coverage found while fuzzing
Previously, the worker would attempt to deflake
an input that was reported to have caused new
coverage. The chances of a flake causing new
coverage seem pretty low to me, and even if it
was a flake that caused it, adding that input to
the cache doesn't seem like a bad thing. The
input is already going to be deflaked during
minimization anyway. If by some off-chance the
code is causing a lot of flaky coverage
increases, and the user doesn't want minimization
to occur, then setting -fuzzminimizetime=1x will
deflake in the way they want without minimizing.
This can be documented as needed.

This fixes a bug where the mem.header().count
could have been one too large if an unrecoverable
crash occured while deflaking an input that
caused code coverage.

Fixes #49047

Change-Id: Ibdf893d7a89a46dd700702afb09e35623615390e
Reviewed-on: https://go-review.googlesource.com/c/go/+/358094
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Julie Qiu <julie@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-27 19:18:20 +00:00
Paul E. Murphy
259735f97a cmd/compile: enable branchelim pass on ppc64
and fix/cleanup lowering of the SSA operator created by the pass.

Change-Id: I7e6153194fd16013e3b24da8aa40683adafa3d15
Reviewed-on: https://go-review.googlesource.com/c/go/+/344573
Run-TryBot: Paul Murphy <murp@ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
2021-10-27 18:24:50 +00:00
Robert Griesemer
bb49eb3e6a cmd/compile/internal/syntax: fix constraint literal parsing for generic functions
Fixes #49174.

Change-Id: I943c370f7abd5f50a541e682f130b3526c3b5bdb
Reviewed-on: https://go-review.googlesource.com/c/go/+/359014
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-27 18:08:49 +00:00
Robert Findley
c0ac39c70e go/types: remove a stale comment
Clean up a comment that was deleted in types2 in CL 353135.

Change-Id: If339efa133e2a3d1eaa3b1e69458471677018261
Reviewed-on: https://go-review.googlesource.com/c/go/+/358517
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>
2021-10-27 16:59:43 +00:00
Russ Cox
4f73fd05a9 cmd: move internal/str back to cmd/go
cmd/go is not subject to all the same restrictions as most of cmd.
In particular it need not be buildable with the bootstrap toolchain.
So it is better to keep as little code shared between cmd/go and
cmd/compile, cmd/link, cmd/cgo as possible.

cmd/internal/str started as cmd/go/internal/str but was moved
to cmd/internal in order to make use of the quoted string code.
Move that code to cmd/internal/quoted and then move the rest of
cmd/internal/str back to cmd/go/internal/str.

Change-Id: I3a98f754d545cc3af7e9a32c2b77a5a035ea7b9a
Reviewed-on: https://go-review.googlesource.com/c/go/+/355010
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-27 16:39:27 +00:00
Cholerae Hu
cfb532158f cmd/go: add darwin/arm64 in the list of supported systems in help message
Fixes #49173.

Change-Id: I71270b4ff7e9ede3cdfa5946b73142a731752adf
Reviewed-on: https://go-review.googlesource.com/c/go/+/358901
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
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2021-10-27 13:12:49 +00:00
Andy Pan
bdefb77309 internal/poll: improve the padding calculation inside struct splicePipe
Updates #48968 and CL 358114

Change-Id: Ic68b4c5420c1c32f78b56874b53d717fa9af1f74
Reviewed-on: https://go-review.googlesource.com/c/go/+/358734
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
2021-10-27 08:50:27 +00:00
Tobias Klauser
5786a54cfe syscall: use dup3 in forkAndExecInChild on NetBSD
Use dup3(oldfd, newfd, O_CLOEXEC) to atomically duplicate the file
descriptor and mark is as close-on-exec instead of dup2 & fcntl.

The dup3 syscall was added in NetBSD 6.0.

Change-Id: I01a4f8c62bfa8fb7f9f3166070380dd2002bb564
Reviewed-on: https://go-review.googlesource.com/c/go/+/358755
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Trust: Benny Siegert <bsiegert@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-27 06:23:35 +00:00
Cuong Manh Le
ca5f65d771 cmd/compile: fix generic type handling when crawling inline body
For base generic type that is written to export file, we need to mark
all of its methods, include exported+unexported methods, as reachable,
so they can be available for instantiation if necessary. But markType
only looks for exported methods, thus causing the crash in #49143.

To fix this, we introduce new method p.markGeneric, to mark all methods
of the base generic type.

This issue has happend for a while (maybe since we add generic
import/export during go1.18 cycle), and was un-intentionally "fixed" in
CL 356254, when we agresssively call p.markEmbed(t). CL 357232 fixed
that wrong agressive behavior, thus reproduce the bug on tip.

Fixes #49143

Change-Id: Ie64574a05fffb282e9dcc8739df4378c5b6b0468
Reviewed-on: https://go-review.googlesource.com/c/go/+/358814
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.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>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-27 05:33:58 +00:00
Ian Lance Taylor
13eccaa990 embed/internal/embedtest: use parenthesized vars for one test
The gofrontend code mishandled this case, so add it to the test.

Change-Id: I183b8fab57552320b04c4826c590b7c6d36b6548
Reviewed-on: https://go-review.googlesource.com/c/go/+/358836
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-10-26 23:12:17 +00:00
Josh Bleecher Snyder
e5c512520b crypto/elliptic: use a const string for precomputed P256 table
Const strings can be marked readonly. This is particularly
important for this relatively large table (88kb).
This is a follow-up to CL 315189.

The generation script is a bit awkward. It needs access to crypto/elliptic
internals, but also needs to be package main. Work around this by
exporting those internals with the "tablegen" build tag.

This requires changing the function signature at the Go-asm bridge.
As long as we're here, shrink the point argument type as well;
the net result is three fewer words of params.

Performance impact is probably noise.

name                   old time/op    new time/op    delta
ScalarBaseMult/P256-8    11.4µs ± 2%    11.3µs ± 1%  -1.32%  (p=0.000 n=19+16)
ScalarBaseMult/P224-8     579µs ± 1%     577µs ± 0%  -0.30%  (p=0.024 n=19+20)
ScalarBaseMult/P384-8    2.31ms ± 4%    2.34ms ± 4%  +1.25%  (p=0.033 n=20+20)
ScalarBaseMult/P521-8    1.33ms ± 0%    1.33ms ± 1%    ~     (p=0.173 n=18+17)
ScalarMult/P256-8        42.7µs ± 0%    42.7µs ± 2%    ~     (p=0.989 n=20+20)
ScalarMult/P224-8         579µs ± 0%     579µs ± 0%    ~     (p=0.538 n=19+18)
ScalarMult/P384-8        2.32ms ± 3%    2.34ms ± 5%    ~     (p=0.235 n=19+20)
ScalarMult/P521-8        1.33ms ± 1%    1.34ms ± 2%    ~     (p=0.141 n=17+20)

Change-Id: I3bee56df34ae61ca8829791d2e67e058ecc8ddbe
Reviewed-on: https://go-review.googlesource.com/c/go/+/339591
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-26 23:06:10 +00:00
Josh Bleecher Snyder
80be4a4f90 crypto/x509: generate new-style build tags for iOS
Make the input match gofmt's output,
to make our lives easier as we phase out
old style build tags.

Change-Id: I95dc5a77058bf17cb02e289703f60784616db006
Reviewed-on: https://go-review.googlesource.com/c/go/+/358934
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-26 22:05:53 +00:00
Michael Pratt
86f6bf18b0 runtime: handle async fatal signals in VDSO
If we receive an async signal while running in the VDSO, such as a
SIGABRT or SIGSEGV sent from another process, we fail to print the
stacktrace with "runtime: unknown pc <vdso PC>".

We already have machinery to handle SIGPROF in the VDSO, but it isn't
hooked up for other signals. Add it to the general signal traceback
path.

This case is covered by TestSegv by making the test more strict w.r.t.
accepted output.

Fixes #47537

Change-Id: I755585f70e0c23e207e135bc6bd2aa68298e5d24
Reviewed-on: https://go-review.googlesource.com/c/go/+/339990
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-26 21:32:57 +00:00
Michael Pratt
091db6392d runtime: fix cgo signals detection
CL 64070 removed lockOSThread from the cgocall path, but didn't update
the signal-in-cgo detection in sighandler. As a result, signals that
arrive during a cgo call are treated like they arrived during Go
execution, breaking the traceback.

Update the cgo detection to fix the backtrace.

Fixes #47522

Change-Id: I61d77ba6465f55e3e6187246d79675ba8467ec23
Reviewed-on: https://go-review.googlesource.com/c/go/+/339989
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-10-26 21:17:38 +00:00
Keith Randall
3a0cd11214 sync/atomic: use a better first-store-in-progress marker
Unlike what the comment says, the GC can see this pointer.
Might as well make it a real pointer, even though ^uintptr(0)
isn't currently causing problems.

Removed the comment about GC not seeing the pointer.

Change-Id: I04bc1fd4848698bec6afb79bd5fda671dfc9a073
Reviewed-on: https://go-review.googlesource.com/c/go/+/241661
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Colin Arnott <colin@urandom.co.uk>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Keith Randall <khr@golang.org>
2021-10-26 20:41:32 +00:00
Michael Pratt
f8779b9e75 runtime: rename _m_ to mp [generated]
_g_, _p_, and _m_ are primarily vestiges of the C version of the
runtime, while today we prefer Go-style variable names (generally gp,
pp, and mp).

This change replaces all remaining uses of _m_ with mp. There are very
few remaining and all replacements are trivial.

[git-generate]
cd src/runtime

rf 'mv canpanic._m_ canpanic.mp'
GOOS=solaris \
  rf 'mv semasleep._m_ semasleep.mp'
GOOS=aix GOARCH=ppc64 \
  rf 'mv semasleep._m_ semasleep.mp'

Change-Id: I83690f7b4d4dc57557963100e9a2560ff343f3e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/307813
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>
2021-10-26 20:12:32 +00:00
Dan Scales
b54bdd281e cmd/compile: clean up the switch statements in (*genInst).node()
There were two main outer switch statements in node() that can just be
combined. Also, for simplicity, changed an IsCmp() conditional into just
another case in the switch statement.

Also, the inner OCALL switch statement had a bunch of fairly duplicate
cases. Combined the cases that all had no special semantics, into a
single default case calling transformCall().

In the OCALL case in dictPass(), got rid of a check for OFUNCINST (which
will always have been removed by this point). Also, eliminated an assert
that could cause unneded failures. transformCall() should always be
called if the node op is still OCALL, so no need to assert on the ops of
call.X.

Added an extra test in issue47078.go, to explicitly check for case where
the X argument of a call is a DOTTYPE.

Change-Id: Ifb3f812ce12820a4ce08afe2887f00f7fc00cd2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/358596
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-26 20:08:41 +00:00
Katie Hockman
1dc77a38d2 internal/fuzz: tiny refactor+fix
Change-Id: I8db9c31ead3e5905b7f9d1faed36555e8aaa00cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/358054
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
Reviewed-by: Julie Qiu <julie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-26 19:04:53 +00:00
Mark Pulford
76cef81bcf cmd/go: stamp VCS commit time into binaries
Only Git and Mercurial are supported for now.

This CL also:
- Skips tagging "revision" and "committime" for empty repositories.
- Stores the full Mercurial changeset ID instead of the short form.

Fixes #37475

Change-Id: I62ab7a986d1ddb2a0e7166a6404b5aa80c2ee387
Reviewed-on: https://go-review.googlesource.com/c/go/+/356251
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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2021-10-26 17:10:45 +00:00
Robert Findley
1b2362bb83 cmd/compile/internal/typecheck: update doc for the 1.18 export format
Update the documentation in iexport.go to use the word 'Constraint'
rather than 'Bound', and to account for recent changes to the export
format.

Change-Id: I83fbcd336d5f865af804bc8bef4f5d997cd9f325
Reviewed-on: https://go-review.googlesource.com/c/go/+/358547
Trust: Robert Findley <rfindley@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-26 15:20:53 +00:00
Cuong Manh Le
283d8a3d53 all: use reflect.{Pointer,PointerTo}
Updates #47651
Updates #48665

Change-Id: I69a87b45a5cad7a07fbd855040cd9935cf874554
Reviewed-on: https://go-review.googlesource.com/c/go/+/358454
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: Brad Fitzpatrick <bradfitz@golang.org>
2021-10-26 14:24:17 +00:00
Dmitri Shuralyov
a2b8c186f6 all: update vendored golang.org/x/tools
Pull in CL 358034 (and some more changes with passing tests) with:

	go get -d golang.org/x/tools@f916b54
	go mod tidy
	go mod vendor

This teaches x/tools/cmd/bundle and the package loader it uses about
the new export data version.

Fixes #49159.

Change-Id: Icc36e77e602b1cd2da03708f20d05a66fcf693cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/358620
Trust: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-26 14:05:47 +00:00
Paul E. Murphy
1e2820a6d7 cmd/internal/obj/ppc64: fix usage of CR bit arguments
CR bits and CR fields should be treated separately. Some instructions
modify an entire CR, a CR field, or a single CR bit.

Add a new argument class for CR bits, and teach the assembler the
recognize them as names like CR0LT or CR2SO, and update the CR
bit logic instructions to use them. They will no longer accept
register field (CRn) type arguments.

Fixes #46422
Change-Id: Iaba127d88abada0c2a49b8d3b07a976180565ae4
Reviewed-on: https://go-review.googlesource.com/c/go/+/357774
Run-TryBot: Paul Murphy <murp@ibm.com>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-26 11:58:05 +00:00
Tobias Klauser
23fdd7f0f7 syscall: add utimensat libc wrapper on darwin
Add utimensat as a wrapper around the libc function of the same name.
utimensat was added in macOS 10.13 which is the minimum supported
release since Go 1.17 dropped support for macOS 10.12.

This also allows to drop the fallback to setattrlistTimes which was
used to set timestamps with nanosecond resolution before utimensat could
be used, see #22528 and CL 74952.

Updates #22528

Change-Id: I87b6a76acf1d642ceede9254f7d9d06dddc3fd71
Reviewed-on: https://go-review.googlesource.com/c/go/+/358274
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 05:05:24 +00:00
Tobias Klauser
ec6c00418c syscall: use fcntl F_DUP2FD_CLOEXEC in forkAndExecInChild on illumos
Use fcntl(oldfd, F_DUP2FD_CLOEXEC, newfd) to duplicate the file
descriptor and mark is as close-on-exec instead of dup2 & fcntl.

Illumos implements dup3 like this in libc.

Change-Id: I9782bce553ffb832e9b1a12bbf3c0a40c821f56e
Reviewed-on: https://go-review.googlesource.com/c/go/+/358374
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 05:02:53 +00:00
fanzha02
adfb85b315 runtime, runtime/asan: add asan runtime support
These are the runtime support functions for letting Go code interoperate
with the C/C++ address sanitizer. Calls to asanread/asanwrite are now
inserted by the compiler with the -asan option.  Calls to
asanunpoison/asanpoison will be from other runtime functions in a
subsequent CL.

Updates #44853.

Change-Id: I9e8fc0ce937828bc7f4a8b6637453ddc3862c47b
Reviewed-on: https://go-review.googlesource.com/c/go/+/298613
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 01:22:47 +00:00
Fannie Zhang
49fda9e4f5 cmd/go: add -asan option
The -asan option compiles Go code to use the address sanitizer.  This is
intended for use when linking with C/C++ code compiled with -fsanitize=address.
When memory blocks are passed back and forth between C/C++ and Go, code in
both languages will agree as to whether the memory is validly allocated or not,
and will report errors for any use of invalid memory.

Updates #44853.

Change-Id: I0209002ef795cc1c823daae557fb80c906158db3
Reviewed-on: https://go-review.googlesource.com/c/go/+/298612
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-26 01:18:46 +00:00
fanzha02
41f74079a9 cmd/internal/obj/arm64: add a restriction on move constant instructions
For MOVK/MOVN/MOVZ instructions, the assembler does not accept zero
shifts, and the CL 275812 added the error check. This CL adds this
restriction to the document.

Change-Id: I8818d76ca2f11dade2307f3678ca521f4e64d164
Reviewed-on: https://go-review.googlesource.com/c/go/+/312210
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-26 01:07:41 +00:00
gosoon
0ec1b62ee2 doc/go1.18.html: fix a typo
gofmt -> <code>gofmt</code>

Change-Id: Idc01b01d8eb185f5e378000d11d622935b14db6e
GitHub-Last-Rev: 8d55dc7b86
GitHub-Pull-Request: golang/go#49084
Reviewed-on: https://go-review.googlesource.com/c/go/+/357251
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-10-26 00:38:52 +00:00
Gusted
b36b001ff1 container/list: remove unnecessary code
Remove a unnecessary statement in the test function, the variables
aren't checked afterwards. Also remove return statements in helper
functions and remove the declaration that a the helper function return a
value. The return value isn't used in the current state of code

Change-Id: I5bc384104c1002c4138e0894938778ae9710ce4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/358714
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>
2021-10-26 00:30:24 +00:00
Cherry Mui
e9eb66da30 cmd/internal/obj/riscv: don't split ADD to SP to two adds
When adding a large constant to a register we generate two adds,
we may generate two ADD instructions if the constant does not fit
in one ADD but does fit in two. This is generally fine except that
if the target register is SP (such as in function prologues or
epilogues for functions with large frames), this creates an
intermediate state that the SP is not 0 nor the full frame size.
For signal safety (preemption signal and profiling signal) we
require that the frame is either not created at all or fully
created, meaning that the SP must be written in a single
instruction. Splitting to two adds breaks the requirement. So not
splitting it.

(We could mark such instructions not async-preemptible. But
profiling signal can still cause problems.)

(We could generate "ADD $c1, SP, Rtmp; ADD $c2; Rtmp; SP" to save
an instruction if that is desired, while still ensuring that SP
is written in a single instruction.)

May fix flaky failures like https://build.golang.org/log/11537ec020a902b0ec0fc065f61161b729eb9880

Change-Id: I5cf38a6a028afe01aa3b6eeb163487bbd504b64f
Reviewed-on: https://go-review.googlesource.com/c/go/+/358436
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-25 23:28:03 +00:00
Dan Scales
fd2f4b58b3 cmd/compile: update the export version for generics
Bump the export version to a new value iexportVersionGo1_18 (2). This
will give a better error message when old compilers/tools encounter the
new export format (that includes parameterized types and functions).

We are also making a breaking change in the format:
 - a 'kind' byte is added to constant values

Also updated tinter() to pass the implicit bit through during type
substitution.

Tested that all tests still pass if the iexportVersionCurrent is changed
back to 1 in typecheck/iexport.go, iimporter/iimport.go, and
gcimporter/iimport.go

Updates #47654

Change-Id: I1dbeb167a97f6c7e0b7e0c011d6bada5db312b36
Reviewed-on: https://go-review.googlesource.com/c/go/+/357049
Run-TryBot: Dan Scales <danscales@google.com>
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2021-10-25 22:17:34 +00:00
fanzha02
85b3b4ee03 cmd/compile: add -asan option
The -asan option causes the compiler to add instrumentation for the
C/C++ address sanitizer.  Every memory read/write will be replaced
by a call to asanread/asanwrite.

This CL also inserts asan instrumentation during SSA building.

This CL passes tests but is not usable by itself. The actual
implementation of asanread/asanwrite in the runtime package, and
support for -asan in the go tool and tests, will follow in subsequent
CLs.

Updates #44853.

Change-Id: Ia18c9c5d5c351857420d2f6835f0daec2ad31096
Reviewed-on: https://go-review.googlesource.com/c/go/+/298611
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-25 21:51:20 +00:00
Ian Lance Taylor
60c3069dd8 internal/poll: avoid tiny allocator for splicePipe
We want to set a finalizer on splicePipe, so make it large enough to
not use the tiny allocator. Otherwise the finalizer will not run until
the rest of the tiny allocation can be freed. This only matters on
32-bit systems.

Fixes #48968

Change-Id: I8eb3c9f48fdccab7dc79c5b918d4257b6151ee91
Reviewed-on: https://go-review.googlesource.com/c/go/+/358114
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2021-10-25 21:03:33 +00:00
Cherry Mui
e35b5b25d9 cmd/compile: fix typo in comment in CL 358435
Change-Id: I0d8128668fc7a80b29aabc58dbc9a2929b889ec9
Reviewed-on: https://go-review.googlesource.com/c/go/+/358614
Trust: Cherry Mui <cherryyz@google.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2021-10-25 21:02:43 +00:00
Keith Randall
f92c8f07ac cmd/link: escape % characters in symbols when reporting errors
Generic function symbols sometimes have % in them, like:

    main.B2[%2eshape.string_0].m2·f

Which confuses this code because it doesn't esacpe % when
using this string as a format string, instead of a format argument.

Or could we get rid of the . -> %2e rewrite somehow?
I think it comes from LinkString.

Change-Id: I3275501f44cf30485e9d4577e0dfa77996d4939e
Reviewed-on: https://go-review.googlesource.com/c/go/+/357837
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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Reviewed-by: Dan Scales <danscales@google.com>
2021-10-25 20:41:00 +00:00
Keith Randall
72b6a89ca5 cmd/compile: revert most of CL 349169
The method of using references to dictionaries to hold methods
live during linker deadcode elimination wasn't working very well.
I implemented a new scheme in the CL below this, so this CL strips
out the old method.

The new method has the added benefit of having 0 runtime overhead
(unlike the stuff we're ripping out here, which does have a small overhead).

Update #48047

Change-Id: I68ac57119792d53c58f1480f407de6ab2bb53211
Reviewed-on: https://go-review.googlesource.com/c/go/+/357836
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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2021-10-25 20:40:00 +00:00
Keith Randall
0ae0d5c62e cmd/compile: remove MarkUsedIfaceMethodIndex mechanism
We don't need it any more, after CL 357835.

Change-Id: I1ff5f24b5540c3e80c4b35be8215a1c378952274
Reviewed-on: https://go-review.googlesource.com/c/go/+/357894
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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2021-10-25 20:39:31 +00:00
Keith Randall
c26a32a500 cmd/compile,cmd/link: introduce generic interface call relocations
To capture the fact that a method was called on a generic interface,
so we can make sure the linker doesn't throw away any implementations
that might be the method called.

See the comment in reflect.go for details.

Fixes #49049

Change-Id: I0be74b6e727c1ecefedae072b149f59d539dc1e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/357835
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-10-25 20:39:17 +00:00
Richard Musiol
252324e879 cmd/link: increase reserved space for passing env on wasm
On wasm, the wasm_exec.js helper passes the command line arguments and
environment variables via a reserved space in the wasm linear memory.
Increase this reserved space from 4096 to 8192 bytes so more environment
variables can fit into the limit.

Later, after https://golang.org/cl/350737 landed, we can switch to the
WASI interface for getting the arguments and environment. This would
remove the limit entirely.

Fixes #49011

Change-Id: I48a6e952a97d33404ed692c98e9b49c5cd6b269b
Reviewed-on: https://go-review.googlesource.com/c/go/+/358194
Trust: Richard Musiol <neelance@gmail.com>
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2021-10-25 20:08:25 +00:00
Katie Hockman
8c94aa40e6 cmd/go/testdata/script: fix flaky test_fuzz_fuzztime test
Previously, the test would panic if the short timeout
was reached before fuzzing began. Increasing the
timeout should stop this test from being flaky.

Fixes #49046

Change-Id: Iaa0b3b3e8ea29d9a42ab5fc1c801fc73fffe1675
Reviewed-on: https://go-review.googlesource.com/c/go/+/358055
Trust: Katie Hockman <katie@golang.org>
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2021-10-25 18:59:26 +00:00
Agniva De Sarker
f47335e653 crypto/tls: add Conn.NetConn method
NetConn method gives us access to the underlying net.Conn
value.

Fixes #29257

Change-Id: I68b2a92ed9dab4be9900807c94184f8c0aeb4f72
Reviewed-on: https://go-review.googlesource.com/c/go/+/325250
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Trust: Agniva De Sarker <agniva.quicksilver@gmail.com>
Trust: Katie Hockman <katie@golang.org>
2021-10-25 18:46:45 +00:00
Cherry Mui
9012996a9a cmd/compile: don't clobber LR for tail calls
When doing a tail call the link register is live as the callee
will directly return to the caller (of the function that does the
tail call). Don't allocate or clobber the link register.

Fixes #49032.

Change-Id: I2d60f2354e5b6c14aa285c8983a9786687b90223
Reviewed-on: https://go-review.googlesource.com/c/go/+/358435
Trust: Cherry Mui <cherryyz@google.com>
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2021-10-25 17:46:41 +00:00
wdvxdr
95372efc4d cmd/compile: use SetInit instead of *PtrInit
Change-Id: Ie802ff27b611ed248d7b14f6e972e6300c181f43
Reviewed-on: https://go-review.googlesource.com/c/go/+/358316
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
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2021-10-25 17:29:14 +00:00
Robert Findley
bc0eb5789e cmd/compile/internal/typecheck: record whether an interface is implicit
In preparation for capturing the implicit interface bit in export data,
thread through the IsImplicit property from types2 into typecheck.

Change-Id: I9b46fe73de102935a127e6ececaacd76738b557e
Reviewed-on: https://go-review.googlesource.com/c/go/+/357109
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2021-10-25 17:18:40 +00:00
Robert Findley
70ffd852cc go/types: remove subscripts from type parameter names
Now that we've removed the necessity for subscripts in importers, we can
effectively eliminate them from the the type parameter API by removing
them from the type string.

Change-Id: Ic4491b0dea27b0e0ce2d0636dccfaf05168ef9e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/357814
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2021-10-25 17:09:57 +00:00
Charlotte Brandhorst-Satzkorn
52b10ab794 net/http: correct Content-Length parsing for js/wasm
The Content-Length was incorrectly set to 0 for ill-formed and invalid
values. In these cases, return an error.

If the Content-Length header was omitted, it was incorrectly set to 0.
In this case, set the Content-Length value to -1.

Fixes #49108

Change-Id: I24fe9a31ed5b6ddb53f2b2bd10f2c84e428823e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/358134
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2021-10-25 17:02:16 +00:00