- Build cmd with CGO_ENABLED=0. Doing so removes the C compiler
toolchain from the reproducibility perimeter and also results in
cmd/go and cmd/pprof binaries that are statically linked,
so that they will run on a wider variety of systems.
In particular the Linux versions will run on Alpine and NixOS
without needing a simulation of libc.so.6.
The potential downside of disabling cgo is that cmd/go and cmd/pprof
use the pure Go network resolver instead of the host resolver on
Unix systems. This means they will not be able to use non-DNS
resolver mechanisms that may be specified in /etc/resolv.conf,
such as mDNS. Neither program seems likely to need non-DNS names
like those, however.
macOS and Windows systems still use the host resolver, which they
access without cgo.
- Build cmd with -trimpath when building a release.
Doing so removes $GOPATH from the file name prefixes stored in the
binary, so that the build directory does not leak into the final artifacts.
- When CC and CXX are empty, do not pick values to hard-code into
the source tree and binaries. Instead, emit code that makes the
right decision at runtime. In addition to reproducibility, this
makes cross-compiled toolchains work better. A macOS toolchain
cross-compiled on Linux will now correctly look for clang,
instead of looking for gcc because it was built on Linux.
- Convert \ to / in file names stored in .a files.
These are converted to / in the final binaries, but the hashes of
the .a files affect the final build ID of the binaries. Without this
change, builds of a Windows toolchain on Windows and non-Windows
machines produce identical binaries except for the input hash part
of the build ID.
- Due to the conversion of \ to / in .a files, convert back when
reading inline bodies on Windows to preserve output file names
in error messages.
Combined, these four changes (along with Go 1.20's removal of
installed pkg/**.a files and conversion of macOS net away from cgo)
make the output of make.bash fully reproducible, even when
cross-compiling: a released macOS toolchain built on Linux or Windows
will contain exactly the same bits as a released macOS toolchain
built on macOS.
The word "released" in the previous sentence is important.
For the build IDs in the binaries to work out the same on
both systems, a VERSION file must exist to provide a consistent
compiler build ID (instead of using a content hash of the binary).
For #24904.
Fixes#57007.
Change-Id: I665e1ef4ff207d6ff469452347dca5bfc81050e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/454836
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
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We need to clear GOEXPERIMENT any time we are invoking a bootstrap
toolchain. One line missed the clearing of GOEXPERIMENT.
There were three different lines using different syntaxes and subtly
different sets of variables being cleared, so hoist them into a function
so it's all in one place.
Also quote $GOROOT_BOOTSTRAP consistently.
Change-Id: I6c5a5d70c694c24705bbc61298b28ae906c0cf6c
Reviewed-on: https://go-review.googlesource.com/c/go/+/456635
Reviewed-by: Bryan Mills <bcmills@google.com>
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We have a make.bash-time generation capability,
so use it to generate the embedded zip file for time/tzdata.
This is one less file to try to review in CLs like CL 455356.
For #22487.
Fixes#43350.
Change-Id: I2fcd0665fa0b1c830baec5fb4cd714483fea25a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/455357
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Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
I often create dummy files holding various data named things like 'z'.
If a file (not directory) GOROOT/src/z exists, it confuses cmd/go into
thinking z is a standard library package, which breaks the test
Script/mod_vendor.
This CL fixes internal/goroot to only report that something is a standard
library package when a directory with that name exists, not just a file.
Change-Id: I986c9a425e78d23c7e033aeadb8e9f71aab2b878
Reviewed-on: https://go-review.googlesource.com/c/go/+/461955
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Unified IR added several new IR fields for holding *runtime._type
expressions. To avoid throwing off any frontend semantics
(particularly inlining cost heuristics), they were marked as
`mknode:"-"` so that code wouldn't visit them.
Unfortunately, this has a bad interaction with the static init
inlining optimization, because the latter relies on ir.EditChildren to
substitute all parameters. This potentially includes dictionary
parameters, which can appear within the new RType fields.
This CL adds a new ir.EditChildrenWithHidden function that also edits
these fields, and switches staticinit to use it. Longer term, we
should unhide the RType fields so that ir.EditChildren visits them
normally, but that's scarier so late in the release cycle.
Fixes#57778.
Change-Id: I98c1e8cf366156dc0c81a0cb79029cc5e59c476f
Reviewed-on: https://go-review.googlesource.com/c/go/+/461686
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
See also CL 321231 which introduces object.less to match
expected compiler behavior.
Change-Id: I56fbf332a04596dc96393b71d40acf4df5d950fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/461677
Run-TryBot: Robert Griesemer <gri@google.com>
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This CL introduces the new files util.go and util_test.go for both
type checkers; these files factor out functionality that is different
between the type checkers so that more code (that is otherwise mostly
the same) can be generated.
With cmpPos/CmpPos factored out, go/types/scope.go can now be generated.
Change-Id: I35f67e53d83b3c5086a559b1e826db83d38ee217
Reviewed-on: https://go-review.googlesource.com/c/go/+/461596
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This will simplify the generation of go/types files from types2 files.
Change-Id: Ie9c8061346cff098cb884908c7eb569267886594
Reviewed-on: https://go-review.googlesource.com/c/go/+/461082
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Starting point for more code sharing.
Change-Id: Ia6bc3ba54476a5202bfd5f89cef09bacb3f4f3b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/460761
Reviewed-by: Robert Griesemer <gri@google.com>
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This CL replaces the internal trace flag with Config.trace.
While unexported, it can still be set for testing via reflection.
The typical use is for manual tests, where -v (verbose) turns on
tracing output. Typical use:
go test -run Manual -v
This change makes go/types match types2 behavior.
Change-Id: I22842f4bba8fd632efe5929c950f4b1cab0a8569
Reviewed-on: https://go-review.googlesource.com/c/go/+/461081
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go/types:
- gofmt a couple of files
types2:
- add loong64 to sizes list (present in go/types)
- fix a type in validtype.go
- co-locate an accessor with others in typeparam.go
This changes further reduce discrepancy between types2 and go/types.
Change-Id: I2e6a09f1c4b8dbc947c48af13031ff58a2bc6f4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/460996
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This also brings some of the types2 testing code better in sync with
go/types.
Also: fix a minor bug in resolver_test.go (continue traversing
SelectorExpr if the first part is not an identifier).
Change-Id: Ib6c5f6228812b49c185b52a4f02ca5b393418e01
Reviewed-on: https://go-review.googlesource.com/c/go/+/460760
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
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Also, for go/types, switch to using syntax.Inspect instead of
(deprecated) syntax.Crawl.
Change-Id: I8333079040e9676e0a61c23d09d41ca790526eeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/460759
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During constraint type inference, unification may fail because it
operates with limited information (core types) even if the actual
type argument satisfies the type constraint in question.
On the other hand, it is safe to ignore failing unification during
constraint type inference because if the failure is true, an error
will be reported when checking instantiation.
Fixes#53650.
Change-Id: Ia76b21ff779bfb1282c1c55f4174847b29cc6f3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/454655
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Use ERROR for substrings, and ERRORx for regexp error patterns.
Correctly unquote patterns for ERROR and ERRORx.
Adjust all tests in internal/types/testdata and locally as needed.
The changes to internal/types/testdata were made through
repeated applications of regexpr find/replace commands
and manual cleanups.
Fixes#51006.
Change-Id: Ib9ec5001243b688bf5aee56b7d4105fb55999ab4
Reviewed-on: https://go-review.googlesource.com/c/go/+/455755
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Before matching the pattern, the double quotes are simply stripped
(no Go string unquoting) for now. This is a first step towards use
of proper Go strings as ERROR patterns.
The changes were obtained through a couple of global regexp
find/replace commands:
/\* ERROR ([^"]+) \*/ => /* ERROR "$1" */
// ERROR ([^"]+)$ => // ERROR "$1"
followed up by manual fixes where multiple "/* ERROR"-style
errors appeared on the same line (in that case, the first
regexp matches the first and last ERROR).
For #51006.
Change-Id: Ib92c2d5e339075aeec1ea74c339b5fecf953d1a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/455718
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Sorting is only needed if there are multiple matching errors on
the same line. Instead, in that rare case, select the error that
is closest.
Follow-up on CL 456137.
Change-Id: Ia2056b21c629f3a42495e32de89607fbefb82fa7
Reviewed-on: https://go-review.googlesource.com/c/go/+/456335
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Auto-Submit: Robert Griesemer <gri@google.com>
Adjust the testFiles function to use the new commentMap
function. This makes it possible for testFiles to match
the types2.TestFiles logic more closely.
For #51006.
Change-Id: I6c5ecbeb86d095404ec04ba4452fb90d404b8280
Reviewed-on: https://go-review.googlesource.com/c/go/+/456137
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This adds the (adjusted) syntax.CommentMap function and corresponding
test to the types_test package so that we can use it for collecting
ERROR comments in the next CL.
For #51006.
Change-Id: I63ce96e7394c28c02d5a292250586cc49c1f6e19
Reviewed-on: https://go-review.googlesource.com/c/go/+/456125
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Change the ErrorMap function to collect all comments with a comment
text that matches a given regexp pattern. Also rename it to CommentMap.
Adjust uses and corresponding test.
Adjust various type-checker tests with incorrect ERROR patterns.
For #51006.
Change-Id: I749e8f31b532edbf8568f27ba1546dc849efd143
Reviewed-on: https://go-review.googlesource.com/c/go/+/456155
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This is the start of the Go 1.21 development cycle, so update the
Version value accordingly. It represents the Go 1.x version that
will soon open up for development (and eventually become released).
For #40705.
For #57736.
Change-Id: I31b739f632bdc8d14f46560e0e5bf333fb8e7740
Reviewed-on: https://go-review.googlesource.com/c/go/+/462456
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We need to avoid nospill registers at this point in regalloc.
Make sure that we don't restrict our register set to avoid registers
desired by other instructions, if the resulting set includes only
nospill registers.
Fixes#57846
Change-Id: I05478e4513c484755dc2e8621d73dac868e45a27
Reviewed-on: https://go-review.googlesource.com/c/go/+/461685
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Windows provides no reliable way to rename files atomically.
The Plan 9 implementation of os.Rename performs a deletion
if the target exists.
Change-Id: Ife5f9c97b21f48c11e300cd76d8c7f715db09fd4
Reviewed-on: https://go-review.googlesource.com/c/go/+/462395
Auto-Submit: Alan Donovan <adonovan@google.com>
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Change-Id: Ie3fe0274288d6cb6303acdcec1340c480e5c0b20
GitHub-Last-Rev: ce9d44619e
GitHub-Pull-Request: golang/go#57848
Reviewed-on: https://go-review.googlesource.com/c/go/+/462277
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This patch ensures that the go command's "list" subcommand accepts
coverage-related build options, which were incorrectly left out when
"go build -cover" was rolled out. This is needed in order to do things
like check the staleness of an installed cover-instrumented target.
Fixes#57785.
Change-Id: I140732ff1e6b83cd9c453701bb8199b333fc0f2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/462116
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In particular, CheckSignatureFrom just can't check the path length
limit, because it might be enforced above the parent.
We don't need to document the supported signature algorithms for
CheckSignatureFrom, since we document at the constants in what contexts
they are allowed and not. That does leave CheckSignature ambiguous,
though, because that function doesn't have an explicit context.
Change-Id: I4c107440a93f60bc0de07df2b7efeb1a4a766da0
Reviewed-on: https://go-review.googlesource.com/c/go/+/460537
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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At the moment the only documentation is the release notes,
but everything mentioned in the release notes should have
proper documentation separate from them.
Change-Id: I9885962f6c6d947039b0be59b608385781479271
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The arena goexperiment contains code used inside Google in very
limited use cases that we will maintain, but the discussion on #51317
identified serious problems with the very idea of adding arenas to the
standard library. In particular the concept tends to infect many other
APIs in the name of efficiency, a bit like sync.Pool except more
publicly visible.
It is unclear when, if ever, we will pick up the idea and try to push
it forward into a public API, but it's not going to happen any time
soon, and we don't want users to start depending on it: it's a true
experiment and may be changed or deleted without warning.
The arena text in the release notes makes them seem more official
and supported than they really are, and we've already seen a couple
blog posts based on that erroneous belief. Delete the text to try to
set expectations better.
Change-Id: I4f6e328ac470a9cd410f5f722d0769ef62d5e5ba
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These are mentioned in the release notes but not the actual doc comments.
Nothing should exist only in release notes.
Change-Id: I8d10f25a2c9b2677231929ba3f393af9034b777b
Reviewed-on: https://go-review.googlesource.com/c/go/+/462195
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In the fix for 54332 the MOVD R1, R1 instruction was added to
morestack_noctxt function to set the SPWRITE bit. However, the
instruction MOVD R1, R1 results in or r1,r1,r1 which is a special
instruction on ppc64 architecture as it changes the thread priority
and can negatively impact performance in some cases.
More details on such similar nops can be found in Power ISA v3.1
Book II on Power ISA Virtual Environment architecture in the chapter
on Program Priority Registers and Or instructions.
Replacing this by OR R0, R1 has the same affect on setting SPWRITE as
needed by the first fix but does not affect thread priority and
hence does not cause the degradation in performance
Hash65536-64 2.81GB/s ±10% 16.69GB/s ± 0% +494.44%
Fixes#57741
Change-Id: Ib912e3716c6afd277994d6c1c5b2891f82225d50
Reviewed-on: https://go-review.googlesource.com/c/go/+/461597
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This reverts CL 448360 and adds a regression test for #57754.
Reason for revert: broke 'go list' in Debian's distribution of the Go toolchain
Fixes#57754.
Updates #50807.
Change-Id: I3e8b9126294c55f21572774b549fb28f29eded0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/461959
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Remove a superfluous go.mod file in one of the testdata subdirs; test
runs ok without it, no need for it to be there (can confuse tooling).
Change-Id: I3c43dd8ca557fdd32ce2f84cdb2427326a2dd35e
Reviewed-on: https://go-review.googlesource.com/c/go/+/461945
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As we have seen many times, the type checker must be careful to avoid
accessing named type information before the type is fully set up. We
need a more systematic solution to this problem, but for now avoid one
case that causes a crash: checking a selector expression on an
incomplete type when a type expression is expected.
For golang/go#57522
Change-Id: I7ed31b859cca263276e3a0647d1f1b49670023a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/461577
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Fix incorrect comment for the runtime package.
Change-Id: Iab889eff0e9c622afbed959d32b8b5f0ed0bfebf
GitHub-Last-Rev: e9587868db
GitHub-Pull-Request: golang/go#57731
Reviewed-on: https://go-review.googlesource.com/c/go/+/461498
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While at it, also remove the word "constraint" in the detail explanation
of an unsatisfied constraint.
Fixes#57500.
Change-Id: I55dae1694de2cfdb434aeba9d4a3530af7aca8f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/460455
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
CL 451735 worked around bugs in Apple's atfork handlers by calling
notify_is_valid_token and xpc_atfork_child at startup, so that init
code that wouldn't be safe in the child process would be warmed up in
the parent process instead, but xpc_atfork_child broke use of the xpc
library in Go programs, and xpc is internally used by various macOS
frameworks (#57263).
CL 459175 reverted that change, and then CL 459176 tried a new
approach: use __fork, which doesn't call any of the atfork handlers at all.
That worked, but an Apple engineer reviewing the change in private
email suggests that since __fork is not public API, it should be avoided.
The same engineer (with access to the source code for the xpc library)
suggests that the breakage in #57263 is caused by xpc_atfork_child
marking the library as unusable, expecting an imminent call to exec,
and that calling xpc_date_create_from_current instead would do the
necessary initialization without marking xpc as unusable.
CL 460475 reverted that change, to prepare for this one.
This CL goes back to the original “call functions to warm things up”
approach, replacing xpc_atfork_child with xpc_date_create_from_current.
The CL also updates cmd/link to use OS and SDK version 10.13.0 for
x86 macOS binaries, up from 10.9.0, also suggested by the Apple engineer.
Combined with the two warmup calls, this makes the fork hangs go away.
The minimum macOS version has been 10.13 High Sierra since Go 1.17,
so there should be no problem with writing that in the binaries too.
Fixes#33565.
Fixes#56784.
Fixes#57263.
Fixes#57577.
Change-Id: I20769d9daa1fe9ea930f8009481335f8a14dc21b
Reviewed-on: https://go-review.googlesource.com/c/go/+/460476
Auto-Submit: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
An Apple engineer suggests that since __fork is not public API,
it would be better to use a different fix. With the benefit of source code,
they suggest using xpc_date_create_from_current instead of
xpc_atfork_child. The latter sets some flags that disable certain
functionality for the remainder of the process lifetime (expecting exec),
while the former should do the necessary setup.
Reverting the __fork fix in order to prepare a clean fix based
on CL 451735 using xpc_date_create_from_current.
This reverts commit c61d322d5f.
Change-Id: I2da293ff537237ffd2d40ad756d827c95c84635b
Reviewed-on: https://go-review.googlesource.com/c/go/+/460475
Auto-Submit: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
In CL 436655 I added a GODEBUG setting to this test process to verify
that Wait is eventually called for every exec.Cmd before it becomes
unreachable. However, the cmdHang test helpers in
TestWaitInterrupt/Exit-hang and TestWaitInterrupt/SIGKILL-hang
intentially leak a subprocess in order to simulate a leaky third-party
program, as Go users might encounter in practical use.
To avoid tripping over the leak check, we call Wait on the leaked
subprocess in a background goroutine. Since we expect the process
running cmdHang to exit before its subprocess does, the call to Wait
should have no effect beyond suppressing the leak check.
Fixes#57596.
Updates #52580.
Updates #50436.
Change-Id: Ia4b88ea47fc6b605c27ca6d9d7669c874867a900
Reviewed-on: https://go-review.googlesource.com/c/go/+/460998
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
