This CL optimizes the Hypot function by putting the Abs function in
front of the IsInf check. This simplifies the judgment of IsInf.
Benchmarks:
On linux/arm64,
name old time/op new time/op delta
Hypot-160 5.26ns ± 0% 4.53ns ± 0% -13.84% (p=0.000 n=4+5)
HypotGo-160 5.19ns ± 0% 4.85ns ± 0% -6.53% (p=0.008 n=5+5)
On linux/amd64,
name old time/op new time/op delta
Hypot-44 5.99ns ± 0% 5.99ns ± 0% ~ (p=0.667 n=5+5)
HypotGo-44 7.46ns ± 0% 6.61ns ± 0% -11.37% (p=0.008 n=5+5)
On darwin/arm64,
name old time/op new time/op delta
Hypot-8 3.58ns ± 0% 2.79ns ± 0% -22.01% (p=0.008 n=5+5)
HypotGo-8 3.58ns ± 0% 2.79ns ± 0% -22.15% (p=0.008 n=5+5)
Change-Id: Id79236e01d9494b6e00bbda3ec08c72caf5ef3c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/414974
Reviewed-by: Cherry Mui <cherryyz@google.com>
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For #50436, I want to be able to close the pipes returned by
StdoutPipe and StderrPipe after the Context has been canceled
and the WaitDelay has subsequently expired.
However, the fact that the exec.onceCloser wrapper for StdinPipe
(added in CL 13329043) was retained in CL 65490 suggests to me that
(*os.File).Close is still not safe to call concurrently.
This may cause type assertions of these ReadClosers to *os.File that
once succeeded to no longer do so. However, the StdoutPipe and
StderrPipe methods return interfaces, not concrete *os.Files, so
callers already should not have been relying on that implementation
detail — and as far as I can tell the closeOnce wrapper does not mask
any (*os.File) methods, so assertions to any interface type that
previously succeeded will continue to do so.
This change is logically part of CL 401835, but since it may expose
fragile type-assertions in callers I want to keep it separate for
clearer bisection of any new test failures.
For #50436.
Change-Id: I58de1d48fb6fd788502f13657d8d4484516271cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/437176
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This change undoes CL 401894, because on further consideration
it turns out not to be needed.
This also makes (*Cmd).closeDescriptors a free function, since it does
not actually use the receiver in any way and is not needed to satisfy
any interfaces.
For #50436.
Change-Id: I7915265b0e6398ed5a34fae0c12873ab08a14194
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No test case because the problem can only happen for invalid data. Let
the fuzzer find cases like this.
Fixes#55948
Change-Id: I7ba40ba928d2a14d4ac5b39f966173f3868d4729
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Convert a few occurrences that were submitted after CL 389935.
For #20322
For #51572
Change-Id: I0047361916c402f8e37f515e6b09d451bd499e6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/437235
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When the first call to Do finished, it calls c.wg.Done() to signal
others that the call was done. However, that happens without holding
a lock, so if others call to Do complete and be followed by a call to
ForgotUnshared, that then returns false.
Fixing this by moving c.wg.Done() inside the section guarded by g.mu, so
the two operations won't be interrupted.
Thanks bcmills@ for finding and suggesting fix.
Change-Id: I850f5eb3f9751a0aaa65624d4109aeeb59dee42c
Reviewed-on: https://go-review.googlesource.com/c/go/+/436437
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Change-Id: I4698d0fa78108d83ee91732e8d3878dbff7f9c90
Reviewed-on: https://go-review.googlesource.com/c/go/+/436711
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A key may be forgotten while the call is still in flight. So when the
call finished, it should only delete the key if that key is associated
with the call. Otherwise, we may remove the wrong newly created call.
Fixes#55343
Change-Id: I4fa72d79cad006e5884e42d885d193641ef84e0a
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All inlined functions are Go functions, and thus should be capable of
having a FuncInfo. Missing FuncInfo is likely indication of a compiler
bug that dropped the symbol too early, failing to add it to the symbol
list used for writing output. I believe all existing cases have been
fixed; this check will prevent regressions.
The exception is -linkshared mode. There symbols are loaded from the
shared library, and the FuncInfo is not available. This is a bug, as it
can result in incorrect the FuncID in inlinedCall, but it is very
involved to fix.
For #54959.
For #55954.
Change-Id: Ib0dc4f1ea62525b55f68604d6013ff33223fdcdd
Reviewed-on: https://go-review.googlesource.com/c/go/+/429637
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The linker needs FuncInfo metadata for all inlined functions. This is
typically handled by gc.enqueueFunc calling ir.InitLSym for all function
declarations in typecheck.Target.Decls (ir.UseClosure adds all closures
to Decls).
However, non-trivial closures in Decls are ignored, and are insteaded
enqueued when walk of the calling function discovers them.
This presents a problem for direct calls to closures. Inlining will
replace the entire closure definition with its body, which hides the
closure from walk and thus suppresses symbol creation.
Explicitly create a symbol early in this edge case to ensure we keep
this metadata.
InitLSym needs to move out of ssagen to avoid a circular dependency (it
doesn't have anything to do with ssa anyway). There isn't a great place
for it, so I placed it in ir, which seemed least objectionable.
The added test triggers one of these inlined direct non-trivial closure
calls, though the test needs CL 429637 to fail, which adds a FuncInfo
assertion to the linker. Note that the test must use "run" instead of
"compile" since the assertion is in the linker, and "compiler" doesn't
run the linker.
Fixes#54959.
Change-Id: I0bd1db4f3539a78da260934cd968372b7aa92546
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This change moves Linux epoll's syscalls implementation to the
"runtime/internal/syscall" package. The intention in this CL was to
minimise behavioural changes but make the code more generalised. This
also will allow adding new syscalls (like epoll_pwait2) without the
need to implement assembly stubs for each arch.
It also drops epoll_create as not all architectures provide this call.
epoll_create1 was added to the kernel in version 2.6.27 and Go requires
Linux kernel version 2.6.32 or later since Go 1.18. So it is safe to
always use epoll_create1.
For #53824
For #51087
Change-Id: I9a6a26b7f2075a38e041de1bab4691da0ecb94fc
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This is predicted to reduce allocation, hence GC time.
(And it does.)
Change-Id: I30a46805b81e5ecd3fd7a6737f60ec26ef0498b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/434796
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
This reverts commit 6616573982, corresponding to CL 436915.
Reason for revert: this is causing some bootstrap build problems with older versions of Go 1.17, as I understand it. Still under investigation.
Change-Id: Idb6e17ff7b47004cbf87f967af6d84f214d8abb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/435471
Reviewed-by: David Chase <drchase@google.com>
Change-Id: I268033bfcda34b76ef1d3a3446d6d1d875fc33ea
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Change-Id: Ie1e76d2e99bf2af7f064c9073c1fb866086962f6
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Turn on the CoverageRedesign GOEXPERIMENT by default.
Updates #51430.
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The minimum bootstrap version for Go ≥ 1.20 is Go 1.17. That version
supports the new style //go:build lines. Thus the old style //+build
lines can be dropped in this part of the tree as well. Leave the
//+build lines in cmd/dist which will ensure the minimum Go version
during bootstrap.
As suggested by Cherry during review of CL 430496
For #44505
Change-Id: If53c0b02cacbfb055a33e73cfd38578dfd3aa340
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already skips tests in case of the timestamp error, eg. #97757
Change-Id: Ia696e83cba2e3ed50181a8100b964847092a7365
GitHub-Last-Rev: 8e5f607e14
GitHub-Pull-Request: golang/go#55918
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Updates #53466
Change-Id: Ifa1b8fe79f952a08dbdf91ae5ab23e4431e66134
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Change-Id: I1257270c55d69962988b6034e7341a9142a0c449
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Change-Id: Ia2b376d134d4fd273924de2e4cdee9eba5a15c57
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GitHub-Last-Rev: 336580707c
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Change-Id: Ia0896bd1edf2558821244fecd1c297b599472f47
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Rename "ifaceWords" to "efaceWords", since we are defining
an empty interface.
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Add the description of Setenv that it cannot use if the test have
parallel ancestors.
Fixes#55128
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Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Change-Id: I4f7581d1f4cd8a305acc02454e032c0788d39283
Reviewed-on: https://go-review.googlesource.com/c/go/+/436646
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
