Directly wrap the getcwd implementation provided by libSystem.dylib on
darwin and use it to implement Getwd like on the BSDs. This allows to
drop the custom implementation using getAttrList and to merge the
implementation of Getwd for darwin and the BSDs in syscall_bsd.go.
Same as CL 257497 did for golang.org/x/sys/unix
Change-Id: If30390c4c17cd463bb8fdcb5465f40d6fa11f391
Reviewed-on: https://go-review.googlesource.com/c/go/+/257637
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>
Direct syscalls using syscall numbers are no longer supported on darwin
since Go 1.12, see https://golang.org/doc/go1.12#darwin. Also,
/usr/include/sys/syscall.h is no longer available on recent macOS
versions, so remove the generating script.
Change-Id: I8e2579c3d0e94a61fc041d06280149ec6ccf13e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/257638
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>
Pick up GOOS=ios changes.
This is done by
cd $GOROOT/src
go get -d golang.org/x/net@latest
go mod tidy
go mod vendor
go get -d golang.org/x/sys@latest
go mod tidy
go mod vendor
cd $GOROOT/src/cmd
go get -d golang.org/x/sys@latest
go mod tidy
go mod vendor
Updates #38485.
Change-Id: Ic2b54febb1f851814c9d76c4b55a8837ac4779f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/257618
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
acquireLockRank and releaseLockRank are called from nosplit context, and
thus must be nosplit.
lockWithRank, unlockWithRank, and lockWithRankMayAcquire are called from
spittable context, and thus don't strictly need to be nosplit.
The stated reasoning for making these functions nosplit is to avoid
re-entrant calls due to a stack split on function entry taking a lock.
There are two potential issues at play here:
1. A stack split on function entry adds a new lock ordering edge before
we (a) take lock l, or (b) release lock l.
2. A stack split in a child call (such as to lock2) introduces a new
lock ordering edge _in the wrong order_ because e.g., in the case of
lockWithRank, we've noted that l is taken, but the stack split in
lock2 actually takes stack split locks _before_ l is actually locked.
(1) is indeed avoided by marking these functions nosplit, but this is
really just a bit of duct tape that generally has no effect overall. Any
earlier call can have a stack split and introduce the same new edge.
This includes lock/unlock which are not nosplit!
I began this CL as a change to extend nosplit to lock and unlock to try
to make this mitigation more effective, but I've realized that as long
as there is a _single_ nosplit call between a lock and unlock, we can
end up with the edge. There seems to be few enough cases without any
calls that is does not seem worth the extra cognitive load to extend
nosplit throughout all of the locking functions.
(2) is a real issue which would cause incorrect ordering, but it is
already handled by switching to the system stack before recording the
lock ordering. Adding / removing nosplit has no effect on this issue.
Change-Id: I94fbd21b2bf928dbf1bf71aabb6788fc0a012829
Reviewed-on: https://go-review.googlesource.com/c/go/+/254367
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Michael Pratt <mpratt@google.com>
The rules for go:notinheap were recently tweaked to disallow stack
allocation (CL 249917). This CL updates the documentation about
go:notinheap in runtime/HACKING.md.
Change-Id: Ibca5d9b9d02e1c22c6af1d303aa84c6303a86d92
Reviewed-on: https://go-review.googlesource.com/c/go/+/257357
Trust: Austin Clements <austin@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
We grow the backing store on append by 2x for small sizes and 1.25x
for large sizes. The threshold we use for picking the growth factor
used to depend on the old length, not the old capacity. That's kind of
unfortunate, because then doing append(s, 0, 0) and append(append(s,
0), 0) do different things. (If s has one more spot available, then
the former expression chooses its growth based on len(s) and the
latter on len(s)+1.) If we instead use the old capacity, we get more
consistent behavior. (Both expressions use len(s)+1 == cap(s) to
decide.)
Fixes#41239
Change-Id: I40686471d256edd72ec92aef973a89b52e235d4b
Reviewed-on: https://go-review.googlesource.com/c/go/+/257338
Trust: Keith Randall <khr@golang.org>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
The CL 249758 added `FMOVQ $vcon, Vd` instruction and assembler used
128-bit simd literal-loading to load `$vcon` from pool into 128-bit vector
register `Vd`. Because Go does not have 128-bit integers for now, the
assembler will report an error of `immediate out of range` when
assembleing `FMOVQ $0x123456789abcdef0123456789abcdef, V0` instruction.
This patch lets 128-bit integers take two 64-bit operands, for the high
and low parts separately and adds `VMOVQ $hi, $lo, Vd` instruction to
move `$hi<<64+$lo' into 128-bit register `Vd`.
In addition, this patch renames `FMOVQ/FMOVD/FMOVS` ops to 'VMOVQ/VMOVD/VMOVS'
and uses them to move 128-bit, 64-bit and 32-bit constants into vector
registers, respectively
Update the go doc.
Fixes#40725
Change-Id: Ia3c83bb6463f104d2bee960905053a97299e0a3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/255900
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
The 387 port needs to load a floating-point control word from a
global location to implement float32 arithmetic.
When compiling with -pie, loading that control word clobbers an
integer register. If that register had something important in it, boom.
Fix by using LEAL to materialize the address of the global location
first. LEAL with -pie works because the destination register is
used as the scratch register.
387 support is about to go away (#40255), so this will need to be
backported to have any effect.
No test. I have one, but it requires building with -pie, which
requires cgo. Our testing infrastructure doesn't make that easy.
Not worth it for a port which is about to vanish.
Fixes#41503
Change-Id: I140f9fc8fdce4e74a52c2c046e2bd30ae476d295
Reviewed-on: https://go-review.googlesource.com/c/go/+/257277
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Keith Randall <khr@golang.org>
In CL 255718 the -S=2 assembly output was enhanced to dump symbol
ABIs. This patch fixes a bug in that CL: when dumping the relocations
on a symbol, we were dumping the symbol's ABI as opposed to the
relocation target symbol's ABI.
Change-Id: I134128687757f549fa37b998cff1290765889140
Reviewed-on: https://go-review.googlesource.com/c/go/+/257202
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Suggested by @yaxinlx.
Fixes#41612.
Change-Id: I98b9968a95d090ee3c67ff02678e1874e6d98c33
Reviewed-on: https://go-review.googlesource.com/c/go/+/257159
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Other test flags passed to the test binary, such as -run or -count, are
equally pointless when -c or -i are used, since the test binary is never
run. However, custom flags in that scenario are far more likely to be
due to human error, such as:
# note the "ldflags" typo, which silently did nothing
go test -c -lflags=-w
Instead, make this scenario error. It seems unlikely that anyone is
using -c along with intended custom-defined test flags, and if they are,
removing those extra flags that do nothing is probably a good idea
anyway.
We don't add this restriction for the flags defined in 'go help
testflag', since they are far less likely to be typos or unintended
mistakes. Another reason not to do that change is that other commands
similarly silently ignore no-op flags, such as:
# -d disables the build, so -ldflags is never used
go get -d -ldflags=-w
Fixes#39484.
Change-Id: I6ba2f6866562fe8f8fceaf4cd862d874bf5cd978
Reviewed-on: https://go-review.googlesource.com/c/go/+/237697
Trust: Daniel Martí <mvdan@mvdan.cc>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
If a signal is sent to t.signal before the panic is triggered,
a panicking test may end up with "warning: no tests to run" because
the tRunner that invokes the test in t.Run calls runtime.Goexit on
panic, which causes the panicking test not be recorded in runTests.
Send the signal if and only if there is no panic.
Fixes#41479
Change-Id: I812f1303bfe02c443a1902732e68d21620d6672e
Reviewed-on: https://go-review.googlesource.com/c/go/+/256098
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
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Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Trust: Bryan C. Mills <bcmills@google.com>
Now reports an error if cyclic maps and slices are to be encoded
instead of an infinite recursion. This case wasn't handled in CL 187920.
Fixes#40745.
Change-Id: Ia34b014ecbb71fd2663bb065ba5355a307dbcc15
GitHub-Last-Rev: 6f874944f4
GitHub-Pull-Request: golang/go#40756
Reviewed-on: https://go-review.googlesource.com/c/go/+/248358
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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Allow ';' as a valid character for json field keys and struct tags.
Fixes#39189
Change-Id: I4b602a1b0674ff028db07623682f0d1e8e9fd6c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/234818
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Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
CL 250357 exported net.ErrClosed to allow more reliable detection
of closed network connection errors. Use that error in crypto/tls
as well.
The error message is changed from "tls: use of closed connection"
to "use of closed network connection", so the code that detected such
errors by looking for that text in the error message will need to be
updated to use errors.Is(err, net.ErrClosed) instead.
Fixes#41066
Change-Id: Ic05c0ed6a4f57af2a0302d53b00851a59200be2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/256897
Reviewed-by: Katie Hockman <katie@golang.org>
Trust: Katie Hockman <katie@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>
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Toolstash-check successful for remaining rules using GOARM value.
Change-Id: I254f80d17839ef4957c1b7afbdb4db363a3b9367
Reviewed-on: https://go-review.googlesource.com/c/go/+/240997
Run-TryBot: Giovanni Bajo <rasky@develer.com>
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Trust: Giovanni Bajo <rasky@develer.com>
The IndexString implementation in the bytealg package requires that
the string passed into it be in the range '2 <= len(s) <= MaxLen'
where MaxLen may be any value (including 0).
CL 156998 added calls to bytealg.IndexString where MaxLen was not
first checked. This led to an illegal instruction on s390x with
the vector facility disabled.
This CL guards the calls to bytealg.IndexString with a MaxLen check.
If the check fails then the code now falls back to the pre CL 156998
implementation (a loop over the runes in the string).
Since the MaxLen check is now in place the generic implementation is
no longer called so I have returned it to its original unimplemented
state.
In future we may want to drop MaxLen to prevent this kind of
confusion.
Fixes#41552.
Change-Id: Ibeb3f08720444a05c08d719ed97f6cef2423bbe9
Reviewed-on: https://go-review.googlesource.com/c/go/+/256717
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add type casting to int32: L148-L156, L774-L778
Toolstash-check successful
Change-Id: Ib6544c1d7853c2811def5b18786e1fc5c18086ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/256097
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
Introduce GOOS=ios for iOS systems. GOOS=ios matches "darwin"
build tag, like GOOS=android matches "linux" and GOOS=illumos
matches "solaris". Only ios/arm64 is supported (ios/amd64 is
not).
GOOS=ios and GOOS=darwin remain essentially the same at this
point. They will diverge at later time, to differentiate macOS
and iOS.
Uses of GOOS=="darwin" are changed to (GOOS=="darwin" || GOOS=="ios"),
except if it clearly means macOS (e.g. GOOS=="darwin" && GOARCH=="amd64"),
it remains GOOS=="darwin".
Updates #38485.
Change-Id: I4faacdc1008f42434599efb3c3ad90763a83b67c
Reviewed-on: https://go-review.googlesource.com/c/go/+/254740
Trust: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Austin Clements <austin@google.com>
The instructions have already been updated in greater
detail in "Step 2: Configure git authentication", but
the overview needs updated to reflect the new workflow.
Change-Id: I6f411a3dc500a9058036a4a828403c0153e4220a
Reviewed-on: https://go-review.googlesource.com/c/go/+/256857
Trust: Katie Hockman <katie@golang.org>
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This does not work yet for SSA-able aggregates.
Change-Id: Ib16b9c6158b25bb957145c5f934040b2bab9babd
Reviewed-on: https://go-review.googlesource.com/c/go/+/245132
Trust: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
"mul by constant" until "div by constant"
L547-L609
Change-Id: I19ebb5694e383878f505d34df2591a51fe38431a
Reviewed-on: https://go-review.googlesource.com/c/go/+/254662
Reviewed-by: Keith Randall <khr@golang.org>
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Trust: Alberto Donizetti <alb.donizetti@gmail.com>
The sk_max_ack_backlog was increased from uint16 to uint32 in kernel
version 4.1 and above, so adopt that change to maxListenerBacklog.
See becb74f0acFixes#41470
Change-Id: I63a142eb28f3ac3acaca57f0903c085c6cb15a6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255898
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
End of "constant folding in *shift ops" until EOF
(L1070-)
Toolstash-check is successful.
Change-Id: I55846a459aca5238f831750f04132e13a0baeed7
Reviewed-on: https://go-review.googlesource.com/c/go/+/234198
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
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From "absorb InvertFlags" until "constant folding in *shift ops"
L666-L1011
Toolstash-check is successful.
Change-Id: Ieed7d4643dc3dc2b3649477e87aebd22c81d1322
Reviewed-on: https://go-review.googlesource.com/c/go/+/234197
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
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Toolstash-check successful from L270 until L543.
Change-Id: Ic39ab86c80f970bfb21e318284f6bb3e8a994220
Reviewed-on: https://go-review.googlesource.com/c/go/+/233439
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
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Toolstash-check successful from L0 until L268
Change-Id: Ifc55ea1e4177c21107c521fc72da2da7b507b8ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/232811
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
QueryPackage was a wrapper around QueryPattern with extra validation,
called only once from within the same package. Most of that validation
was already performed much earlier, in (*loader).Load. Inline the
remaining validation and remove the needless indirection.
For #36460
Change-Id: I108a01d416197db8f886889554e07b29f0c37f3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/256057
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
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Direct syscalls are no longer supported on darwin, instead wrap the
existing func ioctl for tests.
Change-Id: Ie2c5b6e5f54e992f4d6b21513ca8f89fcf28ef10
Reviewed-on: https://go-review.googlesource.com/c/go/+/256219
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
For #41315
Change-Id: I3989bcb051ae57dd2d8f89759d241d4cdce49659
Reviewed-on: https://go-review.googlesource.com/c/go/+/255969
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This flag, like the -e flag to 'go list', instructs the command to
make a best effort to continue in spite of errors for specific packages.
Fixes#26603
Change-Id: I5ee2f50c71870ae8ef3f9b3e5b045474adcca525
Reviewed-on: https://go-review.googlesource.com/c/go/+/255960
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This change replaces ImportPaths, ImportPathsQuiet, LoadALL, and
LoadVendor with a single LoadPackages function, with a LoadOpts struct
that more clearly documents the variations in behavior.
It also eliminates the cmd/go/internal/load.ImportPaths function,
which was undocumented and had only one call site (within its own
package).
The modload.LoadTests global variable is subsumed by a field in the
new LoadOpts struct, and is no longer needed for callers that invoke
LoadPackages directly. It has been (temporarily) replaced with a
similar global variable, load.ModResolveTests, which can itself be
converted to an explicit, local argument.
For #37438
For #36460
Updates #40775Fixes#26977
Change-Id: I4fb6086c01b04de829d98875db19cf0118d40f8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/255938
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Functions that require holding sched.lock now have an assertion.
A few places with missing locks have been fixed in this CL:
Additionally, locking is added around the call to procresize in
schedinit. This doesn't technically need a lock since the program is
still starting (thus no concurrency) when this is called, but lock held
checking doesn't know that.
Updates #40677
Change-Id: I198d3cbaa727f7088e4d55ba8fa989cf1ee8f9cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/250261
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When lock ranking is enabled, we can now assert that lock preconditions
are met by checking that the caller holds required locks on function
entry.
This change adds the infrastructure to add assertions. Actual assertions
will be added for various locks in subsequent changes.
Some functions are protected by locks that are not directly accessible
in the function. In that case, we can use assertRankHeld to check that
any lock with the rank is held. This is less precise, but it avoids
requiring passing the lock into the functions.
Updates #40677
Change-Id: I843c6874867f975e90a063f087b6e2ffc147877b
Reviewed-on: https://go-review.googlesource.com/c/go/+/245484
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