Prefix keywords (type, default, case, etc.) with "keyword" in error
messages to make them less ambiguous.
Fixes#68589.
Change-Id: I1eb92d1382f621b934167b3a4c335045da26be9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/623819
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Reviewed-by: Tim King <taking@google.com>
For a wasmexport wrapper, we generate a call to the actual
exported Go function, and use the wrapper function's PC 1 as the
(fake) return address. This address is not used for returning,
which is handled by the Wasm call stack. It is used for stack
unwinding, and PC 1 makes it past the prologue and therefore has
the right SP delta. But if the function has no arguments and
results, the wrapper is frameless, with no prologue, and PC 1
doesn't exist. This causes the unwinder to fail. In this case, we
put PC 0, which also has the correct SP delta (0).
Fixes#69584.
Change-Id: Ic047a6e62100db540b5099cc5a56a1d0f16d58b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/624000
Reviewed-by: David Chase <drchase@google.com>
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Check the various pie combinations with the new FIPS code.
For #69536.
Change-Id: I8fc771eab465c4af46a0ec8154d550c1bf95f7d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/625999
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Don't report a (follow-on) error if a method is not found in a type
due to a prior error that made the type invalid, or which caused an
embedded field of a struct to have an invalid type (and thus one
cannot with certainty claim that a method is missing).
Fixes#53535.
Change-Id: Ib2879c6b3b9d927c93bbbf1d355397dd19f336f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/626997
Auto-Submit: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Tim King <taking@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Currently it's possible for weak->strong conversions to create more GC
work during mark termination. When a weak->strong conversion happens
during the mark phase, we need to mark the newly-strong pointer, since
it may now be the only pointer to that object. In other words, the
object could be white.
But queueing new white objects creates GC work, and if this happens
during mark termination, we could end up violating mark termination
invariants. In the parlance of the mark termination algorithm, the
weak->strong conversion is a non-monotonic source of GC work, unlike the
write barriers (which will eventually only see black objects).
This change fixes the problem by forcing weak->strong conversions to
block during mark termination. We can do this efficiently by setting a
global flag before the ragged barrier that is checked at each
weak->strong conversion. If the flag is set, then the conversions block.
The ragged barrier ensures that all Ps have observed the flag and that
any weak->strong conversions which completed before the ragged barrier
have their newly-minted strong pointers visible in GC work queues if
necessary. We later unset the flag and wake all the blocked goroutines
during the mark termination STW.
There are a few subtleties that we need to account for. For one, it's
possible that a goroutine which blocked in a weak->strong conversion
wakes up only to find it's mark termination time again, so we need to
recheck the global flag on wake. We should also stay non-preemptible
while performing the check, so that if the check *does* appear as true,
it cannot switch back to false while we're actively trying to block. If
it switches to false while we try to block, then we'll be stuck in the
queue until the following GC.
All-in-all, this CL is more complicated than I would have liked, but
it's the only idea so far that is clearly correct to me at a high level.
This change adds a test which is somewhat invasive as it manipulates
mark termination, but hopefully that infrastructure will be useful for
debugging, fixing, and regression testing mark termination whenever we
do fix it.
Fixes#69803.
Change-Id: Ie314e6fd357c9e2a07a9be21f217f75f7aba8c4a
Reviewed-on: https://go-review.googlesource.com/c/go/+/623615
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Fixes#51269
Change-Id: I06747db18ca078c1f1bda9b7bc60006f53191f4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/627035
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Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Execution of the loop body previously either terminated
the iteration (returned false because of a break, goto, or
return) or actually panicked. The check against abi.RF_READY
ensures that the body can no longer run and also panics.
This CL in addition transitions the loop state to abi.RF_PANIC
so that if this already badly-behaved iterator defer-recovers
this panic, then the exit check at the loop context will
catch the problem and panic there.
Previously, panics triggered by attempted execution of a
no-longer active loop would not trigger a panic at the loop
context if they were defer-recovered.
Change-Id: Ieeed2fafd0d65edb66098dc27dc9ae8c1e6bcc8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/625455
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Reviewed-by: Tim King <taking@google.com>
Iteration over swissmaps with low load (think map with large hint but
only one entry) is signicantly regressed vs old maps. See noswiss vs
swiss-tip below (+60%).
Currently we visit every single slot and individually check if the slot
is full or not.
We can do much better by using the control word to find all full slots
in a group in a single operation. This lets us skip completely empty
groups for instance.
Always using the control match approach is great for maps with low load,
but is a regression for mostly full maps. Mostly full maps have the
majority of slots full, so most calls to mapiternext will return the
next slot. In that case, doing the full group match on every call is
more expensive than checking the individual slot.
Thus we take a hybrid approach: on each call, we first check an
individual slot. If that slot is full, we're done. If that slot is
non-full, then we fall back to doing full group matches.
This trade-off works well. Both mostly empty and mostly full maps
perform nearly as well as doing all matching and all individual,
respectively.
The fast path is placed above the slow path loop rather than combined
(with some sort of `useMatch` variable) into a single loop to help the
compiler's code generation. The compiler really struggles with code
generation on a combined loop for some reason, yielding ~15% additional
instructions/op.
Comparison with old maps prior to this CL:
│ noswiss │ swiss-tip │
│ sec/op │ sec/op vs base │
MapIter/Key=int64/Elem=int64/len=6-12 11.53n ± 2% 10.64n ± 2% -7.72% (p=0.002 n=6)
MapIter/Key=int64/Elem=int64/len=64-12 10.180n ± 2% 9.670n ± 5% -5.01% (p=0.004 n=6)
MapIter/Key=int64/Elem=int64/len=65536-12 10.78n ± 1% 10.15n ± 2% -5.84% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=6-12 6.116n ± 2% 6.840n ± 2% +11.84% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=64-12 2.403n ± 2% 3.892n ± 0% +61.95% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=65536-12 1.940n ± 3% 3.237n ± 1% +66.81% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=6-12 66.20n ± 2% 60.14n ± 3% -9.15% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=64-12 97.24n ± 1% 171.35n ± 1% +76.21% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=65536-12 826.1n ± 12% 842.5n ± 10% ~ (p=0.937 n=6)
geomean 17.93n 20.96n +16.88%
After this CL:
│ noswiss │ swiss-cl │
│ sec/op │ sec/op vs base │
MapIter/Key=int64/Elem=int64/len=6-12 11.53n ± 2% 10.90n ± 3% -5.42% (p=0.002 n=6)
MapIter/Key=int64/Elem=int64/len=64-12 10.180n ± 2% 9.719n ± 9% -4.53% (p=0.043 n=6)
MapIter/Key=int64/Elem=int64/len=65536-12 10.78n ± 1% 10.07n ± 2% -6.63% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=6-12 6.116n ± 2% 7.022n ± 1% +14.82% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=64-12 2.403n ± 2% 1.475n ± 1% -38.63% (p=0.002 n=6)
MapIterLowLoad/Key=int64/Elem=int64/len=65536-12 1.940n ± 3% 1.210n ± 6% -37.67% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=6-12 66.20n ± 2% 61.54n ± 2% -7.02% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=64-12 97.24n ± 1% 110.10n ± 1% +13.23% (p=0.002 n=6)
MapPop/Key=int64/Elem=int64/len=65536-12 826.1n ± 12% 504.7n ± 6% -38.91% (p=0.002 n=6)
geomean 17.93n 15.29n -14.74%
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10
Change-Id: Ic07f9df763239e85be57873103df5007144fdaef
Reviewed-on: https://go-review.googlesource.com/c/go/+/627156
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
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Change-Id: I3a3b7da6245a18bf1db0c595008f0eea853ce544
Reviewed-on: https://go-review.googlesource.com/c/go/+/627155
Reviewed-by: Keith Randall <khr@golang.org>
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This matches the behavior of types2.
For #49005.
Change-Id: I45661c96124f1c75c4fb6f69cbba7c73984a8231
Reviewed-on: https://go-review.googlesource.com/c/go/+/626039
Auto-Submit: Robert Griesemer <gri@google.com>
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This package is in charge of the FIPS init-time code+data verification.
If GODEBUG=fips140=off or the empty string, then no verification
happens. Otherwise, the setting must be "on", "debug", or "only",
all of which enable verification. If the setting is "debug", successful
verification prints a message to that effect. Otherwise successful
verification is quiet.
The linker leaves special information for this package to use.
See cmd/internal/obj/fips.go and cmd/link/internal/ld/fips.go,
both submitted in earlier CLs, for details.
For #69536.
Change-Id: Ie1fe29f316db290e0bd7df0a5a09108be4779d63
Reviewed-on: https://go-review.googlesource.com/c/go/+/625998
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Damien Neil <dneil@google.com>
Add cmd/internal/obj/mkcnames.go to do the generation and update
the architecture packages to use it to maintain the Cnames tables.
Currently works correctly on arm64,loong64,mips,ppc64 and s390x.
Change-Id: I5220b0ba6d8a8a5fcc4d9774731eb2af69a671af
Reviewed-on: https://go-review.googlesource.com/c/go/+/622256
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
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Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Commit-Queue: Ian Lance Taylor <iant@golang.org>
For FIPS init-time code+data verification, we need to arrange to
put the FIPS symbols into contiguous regions of the executable
and then record those sections along with the expected checksum.
The cmd/internal/obj changes identify the FIPS symbols and give
them distinguished types, which the linker then places in contiguous
regions. The linker also writes out information to use at run time
to find the FIPS sections, along with the expected hash.
See cmd/internal/obj/fips.go and cmd/link/internal/ld/fips.go
for more details.
The code is disabled in this commit.
CL 625998 and 625999 adds tests.
CL 626000 enables the code.
For #69536.
Change-Id: I48da6db94bc0bea7428c43d4abcf999527bccfcd
Reviewed-on: https://go-review.googlesource.com/c/go/+/625997
Auto-Submit: Russ Cox <rsc@golang.org>
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The failures in #70288 are consistent with and strongly imply
stack corruption during fault handling, and debug prints show
that the Go code run during fault handling is running about
300 bytes above the bottom of the goroutine stack.
That should be okay, but that implies the DLL code that called
Go's handler was running near the bottom of the stack too,
and maybe it called other deeper things before or after the
Go handler and smashed the stack that way.
stackSystem is already 4096 bytes on amd64;
making it match that on 386 makes the flaky failures go away.
It's a little unsatisfying not to be able to say exactly what is
overflowing the stack, but the circumstantial evidence is
very strong that it's Windows.
Fixes#70288.
Change-Id: Ife89385873d5e5062a71629dbfee40825edefa49
Reviewed-on: https://go-review.googlesource.com/c/go/+/627375
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
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This CL refers to the implementation of ARM64 and adds support for the following
types of SIMD instructions:
1. Move general-purpose register to a vector element, e.g.:
VMOVQ Rj, <Vd>.<T>[index]
<T> can have the following values:
B, H, W, V
2. Move vector element to general-purpose register, e.g.:
VMOVQ <Vj>.<T>[index], Rd
<T> can have the following values:
B, BU, H, HU, W, WU, VU
3. Duplicate general-purpose register to vector, e.g.:
VMOVQ Rj, <Vd>.<T>
<T> can have the following values:
B16, H8, W4, V2, B32, H16, W8, V4
4. Move vector, e.g.:
XVMOVQ Xj, <Xd>.<T>
<T> can have the following values:
B16, H8, W4, V2, Q1
5. Move vector element to scalar, e.g.:
XVMOVQ Xj, <Xd>.<T>[index]
XVMOVQ Xj.<T>[index], Xd
<T> can have the following values:
W, V
6. Move vector element to vector register, e.g.:
VMOVQ <Vn>.<T>[index], Vn.<T>
<T> can have the following values:
B, H, W, V
This CL only adds syntax and doesn't break any assembly that already exists.
Change-Id: I7656efac6def54da6c5ae182f39c2a21bfdf92bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/616258
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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This fixes a bug in the test only function Import where it looked for
the first instance of the string "\n$$\n" as the end of the exportdata
section. This should look for the last instance of "\n$$\n" within
the ar file.
Adds unit tests that demonstrate the error.
Added comments to tests that can correctly use the first instance.
Change-Id: I7a85afa41cf1c2902119516b757b7c6625d46d13
Reviewed-on: https://go-review.googlesource.com/c/go/+/626775
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Return an error from FindExportData variants if the contents are not
an archive file.
Change-Id: I2fa8d3553638ef1de6a03e2ce46341f00ed6965f
Reviewed-on: https://go-review.googlesource.com/c/go/+/626697
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Commit-Queue: Tim King <taking@google.com>
For #58113
Change-Id: I5833a898991d8ac1f564863c1c63eb3e2e86f7c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/626756
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Commit-Queue: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
CL 535196 accidentally changed a generated file without changing
the generator program. This updates the generator program to generate
the current file.
Change-Id: I06513c9b29c7ca4084ac3768229ef8793efe0218
Reviewed-on: https://go-review.googlesource.com/c/go/+/625901
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Fold constant int16 addends for usages of math/bits.Add64(x,const,0)
on PPC64. This usage shows up in a few crypto implementations;
notably the go wrapper for CL 626176.
Change-Id: I6963163330487d04e0479b4fdac235f97bb96889
Reviewed-on: https://go-review.googlesource.com/c/go/+/625899
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Keith Randall <khr@golang.org>
The link is no longer accessible.
Replace it with the ACM one.
Change-Id: I4095fd07a1bc193568cd93fbf69955ba0ba96f2b
GitHub-Last-Rev: 33b142d6e8
GitHub-Pull-Request: golang/go#70295
Reviewed-on: https://go-review.googlesource.com/c/go/+/626485
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Spun out of CL 626397, this change vendors in the latest
github.com/google/pprof and that also required updating
golang.org/x/sys to v0.27.
Change-Id: I72ee514494a9e7c36a8943d78f15bdd0445c5cd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/626995
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For the loop body guarded by testing.B.Loop, we disable function inlining and devirtualization inside. The only legal form to be matched is `for b.Loop() {...}`.
For #61515
Change-Id: I2e226f08cb4614667cbded498a7821dffe3f72d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/612043
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TryBot-Bypass: Junyang Shao <shaojunyang@google.com>
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Now that we support pointer types on wasmimport functions, use
them, instead of unsafe.Pointer. This removes unsafe conversions.
There is still one unsafe.Pointer argument left. It is actually a
*Stat_t, which is an exported type with an int field, which is not
allowed as a wasmimport field type. We probably cannot change it
at this point.
Updates #66984.
Change-Id: I445c70b356c3877a5604bee67d19d99a538c682e
Reviewed-on: https://go-review.googlesource.com/c/go/+/627059
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In normal code,
var x = []int{...}
will be laid out by the linker, but in FIPS packages, the slice
assignment has to be deferred to init time to avoid a global
data relocation. We can avoid the init time work by writing
var x = [...]int{...}
instead. Do that.
For #69536.
Change-Id: Ie3c1d25af3f79182ee254014e49d3711038aa327
Reviewed-on: https://go-review.googlesource.com/c/go/+/625815
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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As proposed on #66984, this CL allows more types to be used as
wasmimport/wasmexport function parameters and results.
Specifically, bool, string, and uintptr are now allowed, and also
pointer types that point to allowed element types. Allowed element
types includes sized integer and floating point types (including
small integer types like uint8 which are not directly allowed as
a parameter type), bool, array whose element type is allowed, and
struct whose fields are allowed element type and also include a
struct.HostLayout field.
For #66984.
Change-Id: Ie5452a1eda21c089780dfb4d4246de6008655c84
Reviewed-on: https://go-review.googlesource.com/c/go/+/626615
Reviewed-by: David Chase <drchase@google.com>
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CL 521790 has experimentally enabled RegABI support on Loong64, so it
is possible to switch the Lookup function call to ABIInternal mode.
Change-Id: I3ae053e20c0791efebe6b6bdc9a1550a11372bc2
Reviewed-on: https://go-review.googlesource.com/c/go/+/544435
Reviewed-by: Qiqi Huang <huangqiqi@loongson.cn>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: David Chase <drchase@google.com>
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For: #70156
Change-Id: Ie39a88130f27b4b210ddbcf396cc0ddd2713d58b
Reviewed-on: https://go-review.googlesource.com/c/go/+/624855
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Replaces 'recompile library' error messages with the more accurate
'recompile package' globally.
Change-Id: I7247964c76f1fcb94feda37c78bdfb8a1b1a6492
Reviewed-on: https://go-review.googlesource.com/c/go/+/626696
Reviewed-by: Alan Donovan <adonovan@google.com>
Commit-Queue: Tim King <taking@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
CL 622042 added rand as a compiler builtin, but did not update builtinlist.
Also update the mkbuiltin comment to refer to the current file location,
and add a comment for runtime.rand that it is called from the compiler.
For #54766
Change-Id: I99d2c0bb0658da333775afe2ed0447265c845c82
Reviewed-on: https://go-review.googlesource.com/c/go/+/626755
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Drop support for the indexed format from the test-only Import
function.
Adds several TODOs for further tech debt reduction.
Change-Id: I45cc5ffce43082a145ccb918face067cdccc5ecd
Reviewed-on: https://go-review.googlesource.com/c/go/+/626695
Commit-Queue: Tim King <taking@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>
This change applies a fix for a reflect.Value incorrect comparison
using "==" or reflect.DeepEqual.
This change is a precursor to the change that'll bring in the
static analyzer "reflectvaluecompare", by ensuring that all tests
pass beforehand.
Updates #43993
Change-Id: I6c47eb0a1de6353ac7495cb8cb49b318b7ebba56
Reviewed-on: https://go-review.googlesource.com/c/go/+/626116
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
8-bit and 16-bit sign extensions and 32-bit zero extensions were realized
with left and right shifts before this change. We now support assembling
EXTWB, EXTWH and BSTRPICKV, so all three can be done with a single insn
respectively.
This patch is a copy of CL 479496.
Co-authored-by: WANG Xuerui <git@xen0n.name>
Change-Id: Iee5741dd9ebb25746f51008f3f6c86704339d615
Reviewed-on: https://go-review.googlesource.com/c/go/+/626195
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
