This refactoring is more problematic because the client
package wrap abi.Type, thus the self-referential fields
within ArrayType need to be downcast to the client wrappers
in several places. It's not clear to me this is worthwhile;
this CL is for additional comment, before I attempt similar
changes for other self-referential types.
Change-Id: I41e517e6d851b32560c41676b91b76d7eb17c951
Reviewed-on: https://go-review.googlesource.com/c/go/+/466236
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
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A code cleanup opportunity noticed while trying to make slices
be aligned.
Change-Id: I34a807b4cf67d9b4a136c83714a34ffe71dcb166
Reviewed-on: https://go-review.googlesource.com/c/go/+/462757
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
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was two commits, the first contained a lot of intermediate work,
better this way.
Change-Id: I7c5b79ef78b21a85828c8aaf9baeae86bb144db7
Reviewed-on: https://go-review.googlesource.com/c/go/+/463118
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: David Chase <drchase@google.com>
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I think there may be an issue in bisect search with
change set elements not actually being independent,
to be explored later. For now, modify the test to
remove that property.
Change-Id: I4b171bc024795d950cf4663374ad1dfc4e2952fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/494036
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
Convert the existing gofuzz based fuzz test to a testing.F based fuzz
test.
Change-Id: Ieae69ba7fb17bd54d95c7bb2f4ed04c323c9f15f
Reviewed-on: https://go-review.googlesource.com/c/go/+/494195
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Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
For #41198
Change-Id: Ibb030e94618a1f594cfd98ddea214ad7a88d2e73
Reviewed-on: https://go-review.googlesource.com/c/go/+/494122
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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targs and xlist belong together (xlist contains the type expressions for
each of the type arguments).
Also, in builtins.go, rename xlist to alist2 to avoid some confusion.
Preparation for adding more parameters to the Checker.arguments signature.
Change-Id: I960501cfd2b88410ec0d581a6520a4e80fcdc56a
Reviewed-on: https://go-review.googlesource.com/c/go/+/494121
Auto-Submit: Robert Griesemer <gri@google.com>
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Adds rules that rewrites statements such as ~P&~Q as ~(P|Q) and ~P|~Q as ~(P&Q), removing an extraneous instruction.
Change-Id: Icedb97df741680ddf9799df79df78657173aa500
GitHub-Last-Rev: f22e2350c9
GitHub-Pull-Request: golang/go#60018
Reviewed-on: https://go-review.googlesource.com/c/go/+/493175
Reviewed-by: Keith Randall <khr@golang.org>
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If the infer argument is true, funcInst behaves as before.
If infer is false and there are not enough type arguments,
rather then inferring the missing arguments and instantiating
the function, funcInst returns the found type arguments.
This permits the use of funcInst (and all the checks it does)
to collect the type arguments for partially instantiated
generic functions used as arguments to other functions.
For #59338.
Change-Id: I049034dfde52bd7ff4ae72964ff1708e154e5042
Reviewed-on: https://go-review.googlesource.com/c/go/+/494118
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This eliminate a network access in 'go mod tidy' of an already-tidy
module, which would otherwise be needed to fetch go.mod checksums for
the test dependencies whose go.mod checksums were omitted in Go
releases between Go 1.17 and 1.20 due to bug #56222.
For modules between 'go 1.17' and 'go 1.20' we intentionally preserve
the old 'go mod tidy' output (omitting go.sum entries for the go.mod
files of test dependencies of external packages). We should also avoid
performing extra sumdb lookups for checksums that would be discarded
anyway.
Updates #56222.
Change-Id: I7f0f1c8e902db0e3414c819621c4b99052f503f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/492741
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This CL updates riscv instructions by
https://github.com/riscv/riscv-opcodes
which adds instruction:
APAUSE
And removes the following unused instructions:
AFENCEI
AFMVQX
AFMVXQ
AHFENCEGVMA
AHFENCEVVMA
ASLLIRV32
ASRAIRV32
ASRLIRV32
AURET
Change-Id: I314570c643af3e6bbc9d2cd471b6b39985bcbdff
Reviewed-on: https://go-review.googlesource.com/c/go/+/409415
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Don't assume we have all type arguments if the number of type arguments
matches the number of type parameters. Instead, look explicitly for nil
type arguments in the provided targs.
Preparation for type inference with type arguments provided for type
parameters of generic function arguments passed to other functions.
For #59338.
Change-Id: I00918cd5ed06ae3277b4e41a3641063e0f53fef0
Reviewed-on: https://go-review.googlesource.com/c/go/+/494115
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This updates the doc comment to reflect the behavior of the method.
On error the method returns a partial result.
Fixes#59991
Change-Id: I71e9dfa37e0488c85abd3eeede2a1a34cb74239b
GitHub-Last-Rev: 389488e536
GitHub-Pull-Request: golang/go#60084
Reviewed-on: https://go-review.googlesource.com/c/go/+/494055
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Fix comments, including duplicate is, wrong phrases and articles, misspellings, etc.
Change-Id: I8bfea53b9b275e649757cc4bee6a8a026ed9c7a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/493035
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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Test the built-in handlers using the testing/slogtest package.
Change-Id: I6464b6730293461c38b84fb2bf33cdd09173dd6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/488255
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Add tags to the fields of Source that lower-cases their names for JSON.
The implementation still treats Source specially for performance, but
now the result would be identical if it did not.
Change-Id: I5fd2e500f1a301db62af87be8b877ecd954a26ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/494035
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#57433 added slices.Equal, using it can reduce the amount of code
Change-Id: I70d14b6c4c24da641a34ed36c900d9291033f526
Reviewed-on: https://go-review.googlesource.com/c/go/+/492576
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libfuzzer is written in C and so requires by the C abi that SP be
aligned correctly mod 16. Normally CALLs need to have SP aligned to 0
mod 16, but because we're simulating a CALL (which pushes a return
address) with a JMP (which doesn't), we need to align to 8 mod 16
before JMPing.
This is not causing any current problems that I know of. All the
functions called from this callsite that I checked don't rely on
correct alignment. So this CL is just futureproofing.
Update #49075
Change-Id: I13fcbe9aaf2853056a6d44dc3aa64b7db689e144
Reviewed-on: https://go-review.googlesource.com/c/go/+/494117
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On Windows, syscall.Seek is a thin wrapper over SetFilePointerEx [1],
which does not work on pipes, although it doesn't return an error on
that case. To avoid this undefined behavior, Seek defensively
calls GetFileType and errors if the type is FILE_TYPE_PIPE.
The problem with this approach is that Seek is a low level
foundational function that can be called many times for the same file,
and the additional cgo call (GetFileType) will artificially slow
down seek operations. I've seen GetFileType to account for 10% of cpu
time in seek-intensive workloads.
A better approach, implemented in this CL, would be to move the check
one level up, where many times the file type is already known so the
GetFileType is unnecessary.
The drawback is that syscall.Seek has had this behavior since pipes
where first introduced to Windows in
https://codereview.appspot.com/1715046 and someone could be relying on
it. On the other hand, this behavior is not documented, so we couldn't
be breaking any contract.
[1] https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-setfilepointerex
Change-Id: I7602182f9d08632e22a8a1635bc8ad9ad35a5056
Reviewed-on: https://go-review.googlesource.com/c/go/+/493626
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This is necessary to make hashes be consistent across runs,
otherwise ASLR messes up search.
Change-Id: Icf668dfe4c2008709f7767397b6700d0d5439287
Reviewed-on: https://go-review.googlesource.com/c/go/+/493857
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The purpose of the debug.SetMaxThreads limit is to avoid accidental fork
bomb from something like millions of goroutines blocking on system
calls, causing the runtime to create millions of threads.
By definition we don't create threads created in C, so this isn't a
problem for those threads, and we can exclude them from the limit. If C
wants to create tens of thousands of threads, who are we to say no?
Fixes#60004.
Change-Id: I62b875890718b406abca42a9a4078391e25aa21b
Reviewed-on: https://go-review.googlesource.com/c/go/+/492743
Auto-Submit: Michael Pratt <mpratt@google.com>
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The wasmer runtime will be used to test our wasip1
implementation against the WASI runtime from wasmer.io.
For #59907
Change-Id: Ie7e48c39e03075815ddca46d996b6ec87009b12a
Reviewed-on: https://go-review.googlesource.com/c/go/+/493775
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The FS form was only necessary for reliable hashes in tests,
and for that we can use -trimpath.
Another potential concern would be temporary work directory
names leaking into the names of files generated by cgo and the
like, but we already make sure to avoid those to ensure
reproducible builds: the compiler never sees those paths.
So the FS form is not necessary for that either.
Change-Id: Idae2c6acb22ab64dfb33bb053244d23fbe153830
Reviewed-on: https://go-review.googlesource.com/c/go/+/493737
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Using more of internal/bisect gives us more that will be deleted
from base/hashdebug.go when we have updated the tools that
need the old protocol. It is also cheaper: there is no allocation to
make a decision about whether to enable, and no locking unless
printing is needed.
Change-Id: I43ec398461205a1a9e988512a134ed6b3a3b1587
Reviewed-on: https://go-review.googlesource.com/c/go/+/493736
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The call sites that cared all reversed inner-to-outer to outer-to-inner already.
The ones that didn't care left it alone. No one explicitly wanted inner-to-outer.
Also change to a callback-based interface, so that call sites aren't required
to accumulate the results in a slice (the main reason for that before was to
reverse the slice!).
There were three places where these lists were printed:
1. -d=ssa/genssa/dump, explicitly reversing to outer-to-inner
2. node dumps like -W, leaving the default inner-to-outer
3. file positions for HashDebugs, explicitly reversing to outer-to-inner
It makes no sense that (1) and (2) would differ. The reason they do is that
the code for (2) was too lazy to bother to fix it to be the right way.
Consider this program:
package p
func f() {
g()
}
func g() {
println()
}
Both before and after this change, the ssa dump for f looks like:
# x.go:3
00000 (3) TEXT <unlinkable>.f(SB), ABIInternal
00001 (3) FUNCDATA $0, gclocals·g2BeySu+wFnoycgXfElmcg==(SB)
00002 (3) FUNCDATA $1, gclocals·g2BeySu+wFnoycgXfElmcg==(SB)
v4 00003 (-4) XCHGL AX, AX
# x.go:4
# x.go:8
v5 00004 (+8) PCDATA $1, $0
v5 00005 (+8) CALL runtime.printlock(SB)
v7 00006 (-8) CALL runtime.printnl(SB)
v9 00007 (-8) CALL runtime.printunlock(SB)
# x.go:5
b2 00008 (5) RET
00009 (?) END
Note # x.go:4 (f) then # x.go:8 (g, called from f) between v4 and v5.
The -W node dumps used the opposite order:
before walk f
. AS2 Def tc(1) # x.go:4:3
. INLMARK # +x.go:4:3
. PRINTN tc(1) # x.go:8:9,x.go:4:3
. LABEL p..i0 # x.go:4:3
Now they match the ssa dump order, and they use spaces as separators,
to avoid potential problems with commas in some editors.
before walk f
. AS2 Def tc(1) # x.go:4:3
. INLMARK # +x.go:4:3
. PRINTN tc(1) # x.go:4:3 x.go:8:9
. LABEL p..i0 # x.go:4:3
I'm unaware of any argument for the old order other than it was easier
to compute without allocation. The new code uses recursion to reverse
the order without allocation.
Now that the callers get the results outer-to-inner, most don't need
any slices at all.
This change is particularly important for HashDebug, which had been
using a locked temporary slice to walk the inline stack without allocation.
Now the temporary slice is gone.
Change-Id: I5cb6d76b2f950db67b248acc928e47a0460569f9
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CL 491875 introduces a new bisect command, which we plan to
document for use by end users to debug semantic changes in
the compiler and in GODEBUGs.
This CL adds bisect support to GODEBUGs, at least the ones
used via internal/godebug. Support for runtime-internal
GODEBUGs like panicnil will take a bit more work in followup CLs.
The new API in internal/bisect to support stack-based bisecting
should be easily reusable in non-GODEBUG settings as well,
once we finalize and export the API.
Change-Id: I6cf779c775329aceb3f3b2b2b2f221ce8a67deee
Reviewed-on: https://go-review.googlesource.com/c/go/+/491975
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Change-Id: Ia4cfdea3df8834e6260527ce8e6e894a0547070f
Reviewed-on: https://go-review.googlesource.com/c/go/+/425299
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Meidan Li <limeidan@loongson.cn>
Today, external linking is not supported on any ppc64 ELF target, but
soon openbsd will be enabled with external linking support.
This relocation does not require additional endian specific fixups
like most other PPC64 Go relocation types.
I discovered this during an experiment to support external linking
on ppc64/linux.
Change-Id: I0b12b6172c7ba08df1c8cf024b4aa5e7ee76d0c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/492618
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The x/net version was updated in CL 493596; cmd/internal/moddeps
catches the skew, but only runs on the -longtest builders (because it
requires network access for the bundle tool and x/net dependency).
Change-Id: I48891d51aab23b2ca6f4484215438c60bd8c8c21
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Michael Stapelberg thought the former messages had
upside potential, Russ and I agreed.
Also slightly tweaked the json logging, not sure if
anyone will use it but it should at least be okay.
Change-Id: Iaab75114dd5f5d8f011fab22d32b57abc0272815
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Vendoring for use with the internal/godebug test
and eventually the cmd/compile test as well.
Change-Id: I3f7151949cff584705cb32ba39bf5de5cd45c3f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/493597
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
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go get golang.org/x/tools@8f7fb01dd429 # CL 493619
go mod tidy
go mod vendor
The goal is to set up for importing the bisect command,
for use in tests, in a follow-up CL.
This also updates x/sys and x/net, including in std,
because x/tools now depends on newer versions of those.
Change-Id: I24c283cc165464d9c873ba7a9a4e75a9d02919b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/493596
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This implements the proposal #58671.
Must be explicitly enabled and requires proposal approval.
For #58671.
Change-Id: I150e78f4f3282d6b7cf9d90feeb5f1c5a36d8c38
Reviewed-on: https://go-review.googlesource.com/c/go/+/492835
Auto-Submit: Robert Griesemer <gri@google.com>
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No changes to the moved functions.
Generate const.go for go/types.
Change-Id: I5ac412cecd9f618676a01138aed36428bbce3311
Reviewed-on: https://go-review.googlesource.com/c/go/+/493715
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This matches the go/types version of Checker.overflow.
Preparation for generating this function (and others)
for go/types.
Change-Id: I84117203247011bd2e96c9cf53fd5a443e528bbf
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The unused analyzer handles dot imports now, so a few tests
have picked up vet errors. This CL errors like:
context/x_test.go:524:47: result of context.WithValue call not used
Change-Id: I711a62fd7b50381f8ea45ac526bf0c946a171047
Reviewed-on: https://go-review.googlesource.com/c/go/+/493598
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Instead of writing them to a file and executing that file.
For #59998
Change-Id: I341786926762359f67dccb475295afbbb8ed1054
Reviewed-on: https://go-review.googlesource.com/c/go/+/493555
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TestCrashExitCode was added in CL 491935 to test that the exit code
is honored when using GOTRACEBACK=crash, which is what normally happens
on a stock Windows. The problem is that some applications (not only WER,
as I incorrectly assumed in CL 491935) can hijack a crashing process
and change its exit code.
There is no way to tell if a crashing process using GOTRACEBACK=crash/
wer will have its error code hijacked, so we better don't test this
behavior, which in fact is not documented by the Go runtime.
Change-Id: Ib8247a8a1fe6303c4c7812a1bf2ded5f4e89acb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/493495
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Thanks to the recent addition of the memcombine pass, the
ppc64 ports now have the memcombine optimizations. Previously
in PPC64.rules, the memcombine rules were only added for
ppc64le targets due to the significant increase in size of
the rewritePPC64.go file when those rules were added. The
ppc64 and ppc64le rules had to be different because of the
byte order due to endianness differences.
This enables the memcombine tests to be run on ppc64 as well
as ppc64le.
Change-Id: I4081e2d94617a1b66541d536c0c2662e266c9c1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/492615
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Lynn Boger <laboger@linux.vnet.ibm.com>
