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492 Commits

Author SHA1 Message Date
Hiro
5b6cd3d0cb sync: add Map.Clear
Fixes #61696

Change-Id: I0a31afd3bc433fc84280d56f2798bda10da61eba
GitHub-Last-Rev: 17bedc864f
GitHub-Pull-Request: golang/go#61702
Reviewed-on: https://go-review.googlesource.com/c/go/+/515015
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-02-01 15:34:22 +00:00
Jonathan Amsterdam
600225f83f api/README: refer to doc/README.md
For #64169.

Change-Id: I0fc6d6a041ad48957f4aecd18b85c9098fc9b403
Reviewed-on: https://go-review.googlesource.com/c/go/+/559755
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2024-01-31 19:22:50 +00:00
Alan Donovan
1bb947b2eb runtime/debug: SetCrashOutput sets the FD for fatal panics
This feature makes it possible to record unhandled panics
in any goroutine through a watchdog process (e.g. the same
application forked+exec'd as a child in a special mode)
that can process the panic report, for example by sending
it to a crash-reporting system such as Go telemetry
or Sentry.

Fixes #42888

Change-Id: I5aa7be8f726bbc70fc650540bd1a14ab60c62ecb
Reviewed-on: https://go-review.googlesource.com/c/go/+/547978
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2024-01-31 16:50:42 +00:00
Cherry Mui
5000b51680 Revert "archive/tar: add FileInfoNames interface"
This reverts CL 514235. Also reverts CL 518056 which is a followup
fix.

Reason for revert: Proposal #50102 defined an interface that is
too specific to UNIX-y systems and also didn't make much sense.
The proposal is un-accepted, and we'll revisit in Go 1.23.

Fixes (via backport) #65245.
Updates #50102.

Change-Id: I41ba0ee286c1d893e6564a337e5d76418d19435d
Reviewed-on: https://go-review.googlesource.com/c/go/+/558295
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-01-24 20:54:27 +00:00
Russ Cox
d73b4322ed net/netip: remove Prefix.Compare for Go 1.22
API questions remain, so we decided to back it out for Go 1.22.
Code still lives in the repo, just unexported.

For #61642.

Change-Id: Iccd91b0da48ae72dec9f660476826a220c7ca4be
Reviewed-on: https://go-review.googlesource.com/c/go/+/549615
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Anderson <dave@natulte.net>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2023-12-14 22:24:40 +00:00
Alan Donovan
ed30ee6c56 doc/go1.22: document ast.Object deprecation
The api.txt changes were originally recorded by mistake (sorry)
into go1.21.txt; see CL 504915, which made the actual change
in August.

Change-Id: If46b48d9714f01605888a6e975c1a03ccfce3b3e
Reviewed-on: https://go-review.googlesource.com/c/go/+/547637
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
2023-12-05 21:18:08 +00:00
Russ Cox
d92434935f math/rand/v2: add ChaCha8
This is a replay of CL 516859, after its rollback in CL 543895,
with big-endian systems fixed and the tests disabled on RISC-V
since the compiler is broken there (#64285).

ChaCha8 provides a cryptographically strong generator
alongside PCG, so that people who want stronger randomness
have access to that. On systems with 128-bit vector math
assembly (amd64 and arm64), ChaCha8 runs at about the same
speed as PCG (25% slower on amd64, 2% faster on arm64).

Fixes #64284.

Change-Id: I6290bb8ace28e1aff9a61f805dbe380ccdf25b94
Reviewed-on: https://go-review.googlesource.com/c/go/+/546020
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-12-05 20:32:54 +00:00
Michael Anthony Knyszek
186c473424 api: promote next to go1.22
Change-Id: Ib9d1eabfe6199575ea57183ccb21f62c40e11d84
Reviewed-on: https://go-review.googlesource.com/c/go/+/544555
Reviewed-by: Heschi Kreinick <heschi@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-22 18:54:32 +00:00
Michael Knyszek
82fc03f9c9 Revert "math/rand/v2: add ChaCha8"
This reverts commit 6382893890.

Reason for revert: Causes failures on big endian platforms and riscv64.
Possibly a bug in the generic implementation.

For #64284.
For #64285.

Change-Id: Ic1bb8533d9641fae28d0337b36d434b9a575cd7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/543895
Reviewed-by: Heschi Kreinick <heschi@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
TryBot-Bypass: Michael Knyszek <mknyszek@google.com>
2023-11-20 18:39:03 +00:00
Russ Cox
6382893890 math/rand/v2: add ChaCha8
ChaCha8 provides a cryptographically strong generator
alongside PCG, so that people who want stronger randomness
have access to that. On systems with 128-bit vector math
assembly (amd64 and arm64), ChaCha8 runs at about the same
speed as PCG (25% slower on amd64, 2% faster on arm64).

Obviously all the claimed benchmark variation other than the
new ChaCha8 benchmark is a lie.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ afa459a2f0.amd64 │          bbb48afeb7.amd64           │
                        │      sec/op      │    sec/op     vs base               │
PCG_DXSM-32                    1.488n ± 2%    1.492n ± 2%       ~ (p=0.309 n=20)
ChaCha8-32                                    1.861n ± 2%
SourceUint64-32                1.450n ± 3%    1.590n ± 2%  +9.69% (p=0.000 n=20)
GlobalInt64-32                 2.067n ± 2%    2.061n ± 1%       ~ (p=0.952 n=20)
GlobalInt64Parallel-32        0.1044n ± 2%   0.1041n ± 1%       ~ (p=0.498 n=20)
GlobalUint64-32                2.085n ± 0%    2.256n ± 2%  +8.23% (p=0.000 n=20)
GlobalUint64Parallel-32       0.1008n ± 1%   0.1018n ± 1%       ~ (p=0.041 n=20)
Int64-32                       1.779n ± 1%    1.779n ± 1%       ~ (p=0.410 n=20)
Uint64-32                      1.854n ± 2%    1.882n ± 1%       ~ (p=0.044 n=20)
GlobalIntN1000-32              3.140n ± 3%    3.115n ± 3%       ~ (p=0.673 n=20)
IntN1000-32                    2.496n ± 1%    2.509n ± 1%       ~ (p=0.171 n=20)
Int64N1000-32                  2.510n ± 2%    2.493n ± 1%       ~ (p=0.804 n=20)
Int64N1e8-32                   2.471n ± 2%    2.521n ± 1%  +1.98% (p=0.003 n=20)
Int64N1e9-32                   2.488n ± 2%    2.506n ± 1%       ~ (p=0.663 n=20)
Int64N2e9-32                   2.478n ± 2%    2.482n ± 2%       ~ (p=0.533 n=20)
Int64N1e18-32                  3.088n ± 1%    3.216n ± 1%  +4.15% (p=0.000 n=20)
Int64N2e18-32                  3.493n ± 1%    3.635n ± 2%  +4.05% (p=0.000 n=20)
Int64N4e18-32                  5.060n ± 2%    5.122n ± 1%  +1.22% (p=0.000 n=20)
Int32N1000-32                  2.620n ± 1%    2.672n ± 1%  +2.00% (p=0.002 n=20)
Int32N1e8-32                   2.652n ± 0%    2.646n ± 1%       ~ (p=0.743 n=20)
Int32N1e9-32                   2.644n ± 1%    2.660n ± 2%       ~ (p=0.163 n=20)
Int32N2e9-32                   2.619n ± 2%    2.652n ± 1%       ~ (p=0.132 n=20)
Float32-32                     2.261n ± 1%    2.267n ± 1%       ~ (p=0.516 n=20)
Float64-32                     2.241n ± 2%    2.276n ± 1%       ~ (p=0.080 n=20)
ExpFloat64-32                  3.716n ± 1%    3.779n ± 1%  +1.68% (p=0.007 n=20)
NormFloat64-32                 3.718n ± 1%    3.747n ± 1%       ~ (p=0.011 n=20)
Perm3-32                       34.11n ± 2%    34.23n ± 2%       ~ (p=0.779 n=20)
Perm30-32                      200.6n ± 0%    202.3n ± 2%       ~ (p=0.055 n=20)
Perm30ViaShuffle-32            109.7n ± 1%    115.5n ± 2%  +5.34% (p=0.000 n=20)
ShuffleOverhead-32             107.2n ± 1%    113.3n ± 1%  +5.74% (p=0.000 n=20)
Concurrent-32                  2.108n ± 6%    2.107n ± 1%       ~ (p=0.448 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ afa459a2f0.arm64 │          bbb48afeb7.arm64           │
                       │      sec/op      │    sec/op     vs base               │
PCG_DXSM-8                    2.531n ± 0%    2.529n ± 0%       ~ (p=0.586 n=20)
ChaCha8-8                                    2.480n ± 0%
SourceUint64-8                2.531n ± 0%    2.534n ± 0%       ~ (p=0.227 n=20)
GlobalInt64-8                 2.177n ± 1%    2.173n ± 1%       ~ (p=0.733 n=20)
GlobalInt64Parallel-8        0.4319n ± 0%   0.4304n ± 0%  -0.32% (p=0.003 n=20)
GlobalUint64-8                2.185n ± 1%    2.185n ± 0%       ~ (p=0.541 n=20)
GlobalUint64Parallel-8       0.4295n ± 1%   0.4294n ± 0%       ~ (p=0.203 n=20)
Int64-8                       4.104n ± 0%    4.107n ± 0%       ~ (p=0.193 n=20)
Uint64-8                      4.080n ± 0%    4.081n ± 0%       ~ (p=0.053 n=20)
GlobalIntN1000-8              2.814n ± 1%    2.814n ± 0%       ~ (p=0.879 n=20)
IntN1000-8                    4.140n ± 0%    4.141n ± 0%       ~ (p=0.428 n=20)
Int64N1000-8                  4.139n ± 0%    4.140n ± 0%       ~ (p=0.114 n=20)
Int64N1e8-8                   4.140n ± 0%    4.140n ± 0%       ~ (p=0.898 n=20)
Int64N1e9-8                   4.139n ± 0%    4.140n ± 0%       ~ (p=0.593 n=20)
Int64N2e9-8                   4.140n ± 0%    4.139n ± 0%       ~ (p=0.158 n=20)
Int64N1e18-8                  5.273n ± 0%    5.274n ± 0%       ~ (p=0.308 n=20)
Int64N2e18-8                  6.059n ± 0%    6.058n ± 0%       ~ (p=0.053 n=20)
Int64N4e18-8                  8.803n ± 0%    8.800n ± 0%       ~ (p=0.673 n=20)
Int32N1000-8                  4.131n ± 0%    4.131n ± 0%       ~ (p=0.342 n=20)
Int32N1e8-8                   4.131n ± 0%    4.131n ± 0%       ~ (p=0.091 n=20)
Int32N1e9-8                   4.131n ± 0%    4.131n ± 0%       ~ (p=0.273 n=20)
Int32N2e9-8                   4.131n ± 0%    4.131n ± 0%       ~ (p=0.425 n=20)
Float32-8                     4.110n ± 0%    4.112n ± 0%       ~ (p=0.203 n=20)
Float64-8                     4.104n ± 0%    4.106n ± 0%       ~ (p=0.409 n=20)
ExpFloat64-8                  5.338n ± 0%    5.339n ± 0%       ~ (p=0.037 n=20)
NormFloat64-8                 5.731n ± 0%    5.733n ± 0%       ~ (p=0.692 n=20)
Perm3-8                       26.62n ± 0%    26.65n ± 0%  +0.09% (p=0.000 n=20)
Perm30-8                      194.6n ± 2%    194.9n ± 0%       ~ (p=0.141 n=20)
Perm30ViaShuffle-8            156.4n ± 0%    156.5n ± 0%  +0.06% (p=0.000 n=20)
ShuffleOverhead-8             125.8n ± 0%    125.0n ± 0%  -0.64% (p=0.000 n=20)
Concurrent-8                  2.654n ± 6%    2.441n ± 6%  -8.06% (p=0.009 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ afa459a2f0.386 │            bbb48afeb7.386            │
                        │     sec/op     │    sec/op      vs base               │
PCG_DXSM-32                  7.793n ± 2%    7.647n ±  1%       ~ (p=0.021 n=20)
ChaCha8-32                                  11.48n ±  2%
SourceUint64-32              7.680n ± 1%    7.714n ±  1%       ~ (p=0.713 n=20)
GlobalInt64-32               3.474n ± 3%    3.491n ± 28%       ~ (p=0.337 n=20)
GlobalInt64Parallel-32      0.3253n ± 0%   0.3194n ±  0%  -1.81% (p=0.000 n=20)
GlobalUint64-32              3.433n ± 2%    3.610n ±  2%  +5.14% (p=0.000 n=20)
GlobalUint64Parallel-32     0.3156n ± 0%   0.3164n ±  0%       ~ (p=0.073 n=20)
Int64-32                     7.707n ± 1%    7.824n ±  0%  +1.52% (p=0.005 n=20)
Uint64-32                    7.714n ± 1%    7.732n ±  2%       ~ (p=0.441 n=20)
GlobalIntN1000-32            6.236n ± 1%    6.176n ±  2%       ~ (p=0.499 n=20)
IntN1000-32                  10.41n ± 1%    10.31n ±  2%       ~ (p=0.782 n=20)
Int64N1000-32                10.97n ± 2%    11.22n ±  2%  +2.19% (p=0.002 n=20)
Int64N1e8-32                 10.98n ± 1%    11.07n ±  1%       ~ (p=0.056 n=20)
Int64N1e9-32                 10.95n ± 0%    11.15n ±  2%       ~ (p=0.016 n=20)
Int64N2e9-32                 11.11n ± 1%    11.00n ±  1%       ~ (p=0.654 n=20)
Int64N1e18-32                15.18n ± 2%    14.97n ±  2%       ~ (p=0.387 n=20)
Int64N2e18-32                15.61n ± 1%    15.91n ±  1%  +1.92% (p=0.003 n=20)
Int64N4e18-32                19.23n ± 2%    18.98n ±  1%       ~ (p=1.000 n=20)
Int32N1000-32                10.35n ± 1%    10.31n ±  2%       ~ (p=0.081 n=20)
Int32N1e8-32                 10.33n ± 1%    10.38n ±  1%       ~ (p=0.335 n=20)
Int32N1e9-32                 10.35n ± 1%    10.37n ±  1%       ~ (p=0.497 n=20)
Int32N2e9-32                 10.35n ± 1%    10.41n ±  1%       ~ (p=0.605 n=20)
Float32-32                   13.57n ± 1%    13.78n ±  2%       ~ (p=0.047 n=20)
Float64-32                   22.95n ± 4%    23.43n ±  3%       ~ (p=0.218 n=20)
ExpFloat64-32                15.23n ± 2%    15.46n ±  1%       ~ (p=0.095 n=20)
NormFloat64-32               13.78n ± 1%    13.73n ±  2%       ~ (p=0.031 n=20)
Perm3-32                     46.62n ± 2%    47.46n ±  2%  +1.82% (p=0.004 n=20)
Perm30-32                    400.7n ± 1%    403.5n ±  1%       ~ (p=0.098 n=20)
Perm30ViaShuffle-32          350.5n ± 1%    348.1n ±  2%       ~ (p=0.703 n=20)
ShuffleOverhead-32           326.0n ± 2%    326.2n ±  2%       ~ (p=0.440 n=20)
Concurrent-32                3.290n ± 0%    3.297n ±  4%       ~ (p=0.189 n=20)

For #61716.

Change-Id: Id2a7e1c1db0beb81f563faaefba65fe292497269
Reviewed-on: https://go-review.googlesource.com/c/go/+/516859
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2023-11-19 22:05:54 +00:00
Andy Pan
f664031bc1 net,os: arrange zero-copy of os.File and net.TCPConn to net.UnixConn
Fixes #58808

goos: linux
goarch: amd64
pkg: net
cpu: DO-Premium-Intel
                             │      old      │                 new                  │
                             │    sec/op     │    sec/op     vs base                │
Splice/tcp-to-unix/1024-4       3.783µ ± 10%   3.201µ ±  7%  -15.40% (p=0.001 n=10)
Splice/tcp-to-unix/2048-4       3.967µ ± 13%   3.818µ ± 16%        ~ (p=0.971 n=10)
Splice/tcp-to-unix/4096-4       4.988µ ± 16%   4.590µ ± 11%        ~ (p=0.089 n=10)
Splice/tcp-to-unix/8192-4       6.981µ ± 13%   5.236µ ±  9%  -25.00% (p=0.000 n=10)
Splice/tcp-to-unix/16384-4     10.192µ ±  9%   7.350µ ±  7%  -27.89% (p=0.000 n=10)
Splice/tcp-to-unix/32768-4      19.65µ ± 13%   10.28µ ± 16%  -47.69% (p=0.000 n=10)
Splice/tcp-to-unix/65536-4      41.89µ ± 18%   15.70µ ± 13%  -62.52% (p=0.000 n=10)
Splice/tcp-to-unix/131072-4     90.05µ ± 11%   29.55µ ± 10%  -67.18% (p=0.000 n=10)
Splice/tcp-to-unix/262144-4    170.24µ ± 15%   52.66µ ±  4%  -69.06% (p=0.000 n=10)
Splice/tcp-to-unix/524288-4     326.4µ ± 13%   109.3µ ± 11%  -66.52% (p=0.000 n=10)
Splice/tcp-to-unix/1048576-4    651.4µ ±  9%   228.3µ ± 14%  -64.95% (p=0.000 n=10)
geomean                         29.42µ         15.62µ        -46.90%

                             │      old      │                  new                   │
                             │      B/s      │      B/s       vs base                 │
Splice/tcp-to-unix/1024-4      258.2Mi ± 11%   305.2Mi ±  8%   +18.21% (p=0.001 n=10)
Splice/tcp-to-unix/2048-4      492.5Mi ± 15%   511.7Mi ± 13%         ~ (p=0.971 n=10)
Splice/tcp-to-unix/4096-4      783.5Mi ± 14%   851.2Mi ± 12%         ~ (p=0.089 n=10)
Splice/tcp-to-unix/8192-4      1.093Gi ± 11%   1.458Gi ±  8%   +33.36% (p=0.000 n=10)
Splice/tcp-to-unix/16384-4     1.497Gi ±  9%   2.076Gi ±  7%   +38.67% (p=0.000 n=10)
Splice/tcp-to-unix/32768-4     1.553Gi ± 11%   2.969Gi ± 14%   +91.17% (p=0.000 n=10)
Splice/tcp-to-unix/65536-4     1.458Gi ± 23%   3.888Gi ± 11%  +166.69% (p=0.000 n=10)
Splice/tcp-to-unix/131072-4    1.356Gi ± 10%   4.131Gi ±  9%  +204.72% (p=0.000 n=10)
Splice/tcp-to-unix/262144-4    1.434Gi ± 13%   4.637Gi ±  4%  +223.32% (p=0.000 n=10)
Splice/tcp-to-unix/524288-4    1.497Gi ± 15%   4.468Gi ± 10%  +198.47% (p=0.000 n=10)
Splice/tcp-to-unix/1048576-4   1.501Gi ± 10%   4.277Gi ± 16%  +184.88% (p=0.000 n=10)
geomean                        1.038Gi         1.954Gi         +88.28%

                             │      old      │                   new                   │
                             │     B/op      │    B/op     vs base                     │
Splice/tcp-to-unix/1024-4      0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/2048-4      0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/4096-4      0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/8192-4      0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/16384-4     0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/32768-4     0.000 ±  0%     0.000 ± 0%         ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/65536-4     1.000 ±   ?     0.000 ± 0%  -100.00% (p=0.001 n=10)
Splice/tcp-to-unix/131072-4    2.000 ±  0%     0.000 ± 0%  -100.00% (p=0.000 n=10)
Splice/tcp-to-unix/262144-4    4.000 ± 25%     0.000 ± 0%  -100.00% (p=0.000 n=10)
Splice/tcp-to-unix/524288-4    7.500 ± 33%     0.000 ± 0%  -100.00% (p=0.000 n=10)
Splice/tcp-to-unix/1048576-4   17.00 ± 12%      0.00 ± 0%  -100.00% (p=0.000 n=10)
geomean                                    ²               ?                       ² ³
¹ all samples are equal
² summaries must be >0 to compute geomean
³ ratios must be >0 to compute geomean

                             │     old      │                 new                 │
                             │  allocs/op   │ allocs/op   vs base                 │
Splice/tcp-to-unix/1024-4      0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/2048-4      0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/4096-4      0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/8192-4      0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/16384-4     0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/32768-4     0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/65536-4     0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/131072-4    0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/262144-4    0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/524288-4    0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
Splice/tcp-to-unix/1048576-4   0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
geomean                                   ²               +0.00%                ²
¹ all samples are equal
² summaries must be >0 to compute geomean

Change-Id: I829061b009a0929a8ef1a15c183793c0b9104dde
Reviewed-on: https://go-review.googlesource.com/c/go/+/472475
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-17 23:16:28 +00:00
Robert Griesemer
dd88f23a20 math/big: implement Rat.FloatPrec
goos: darwin
goarch: amd64
pkg: math/big
cpu: Intel(R) Core(TM) i7-8700B CPU @ 3.20GHz
BenchmarkFloatPrecExact/1-12             9380685          125.0 ns/op
BenchmarkFloatPrecExact/10-12            3780493          321.2 ns/op
BenchmarkFloatPrecExact/100-12            698272         1679 ns/op
BenchmarkFloatPrecExact/1000-12           117975         9113 ns/op
BenchmarkFloatPrecExact/10000-12            5913       192768 ns/op
BenchmarkFloatPrecExact/100000-12            164      7401817 ns/op
BenchmarkFloatPrecExact/1000000-12             4    293568523 ns/op

BenchmarkFloatPrecInexact/1-12          12836612           91.26 ns/op
BenchmarkFloatPrecInexact/10-12         10144908          114.9 ns/op
BenchmarkFloatPrecInexact/100-12         4121931          297.3 ns/op
BenchmarkFloatPrecInexact/1000-12        1275886          927.7 ns/op
BenchmarkFloatPrecInexact/10000-12        170392         6546 ns/op
BenchmarkFloatPrecInexact/100000-12        18307        65232 ns/op
BenchmarkFloatPrecInexact/1000000-12        1701       621412 ns/op

Fixes #50489.

Change-Id: Ic952f00e35d42f2470ecab53df712721997eac94
Reviewed-on: https://go-review.googlesource.com/c/go/+/539299
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
2023-11-14 00:44:42 +00:00
Robert Griesemer
30de0b5ef4 go/types, types2: implement Alias proposal (export API)
This CL exports the previously unexported Alias type and
corresponding functions and methods per issue #63223.

Whether Alias types are used or not is controlled by
the gotypesalias setting with the GODEBUG environment
variable. Setting gotypesalias to "1" enables the Alias
types:

	GODEBUG=gotypesalias=1

By default, gotypesalias is not set.

Adjust test cases that enable/disable the use of Alias
types to use -gotypesalias=1 or -gotypesalias=0 rather
than -alias and -alias=false for consistency and to
avoid confusion.

For #63223.

Change-Id: I51308cad3320981afac97dd8c6f6a416fdb0be55
Reviewed-on: https://go-review.googlesource.com/c/go/+/541737
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-11-13 20:18:45 +00:00
Robert Griesemer
8da6405e0d go/types, types2: implement Info.PkgNameOf
For #62037.

Change-Id: I354f6417232708278d3f2b2d5ea41ff48e08d6b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/541575
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
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2023-11-11 02:02:35 +00:00
Andy Pan
3188758653 log/slog: add LogLoggerLevel to enable setting level on the default logger
Fixes #62418

Change-Id: I889a53d00c8a463b4d7ddb41893c000d7cd0e7b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/525096
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
2023-11-10 21:25:30 +00:00
Roland Shoemaker
9f63534858 crypto/x509: implement AddCertWithConstraint
Adds the CertPool method AddCertWithConstraint, which allows adding a
certificate to a pool with an arbitrary constraint which cannot be
otherwise expressed in the certificate.

Fixes #57178

Change-Id: Ic5b0a22a66aefa5ba5d8ed5ef11389996b59862b
Reviewed-on: https://go-review.googlesource.com/c/go/+/519315
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
2023-11-09 19:41:40 +00:00
Robert Griesemer
43a27a7e8c go/types: export Info.FileVersions
For #62605.

Change-Id: Icf1a8332e4b60d77607716b55893ea2f39ae2f10
Reviewed-on: https://go-review.googlesource.com/c/go/+/540056
Run-TryBot: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-11-07 16:52:44 +00:00
Russ Cox
b54cae276a go/version: add new package
go/version provides basic comparison of Go versions,
for use when deciding whether certain language features
are allowed, and so on.

See the proposal issue #62039 for more details.

Fixes #62039

Change-Id: Ibdfd4fe15afe406c46da568cb31feb42ec30b530
Reviewed-on: https://go-review.googlesource.com/c/go/+/538895
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-11-06 23:20:32 +00:00
Guoqi Chen
39d3c4ad35 debug/elf,cmd/link: add additional relocations for loong64
The Linker Relaxation feature on Loong64 is already supported in binutils 2.41.
The intermediate code generated after enabling this feature introduces three
reloc types R_LARCH_B26, R_LARCH_ADD32 and R_LARCH_SUB32.

The other relocation types are not currently used when running all.bash, but
in order to avoid the host tool chain making the decision to use it we don't
have to catch it every time.

The LoongArch ABI at here:
https://github.com/loongson/la-abi-specs/blob/release/la-abi.adoc

Corresponding binutils implementation:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=be1ebb6710a8f707bd4b0eecbd00f4f4964050e5
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=1b6fccd28db14fffe75ff6755307047ef932c81e

Fixes #63725

Change-Id: I891115cfdbcf785ab494c881d5f9d1bf8748da8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/537615
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-02 19:46:03 +00:00
Mateusz Poliwczak
dd84bb6824 crypto/x509: add new OID type and use it in Certificate
Fixes #60665

Change-Id: I814b7d4b26b964f74443584fb2048b3e27e3b675
GitHub-Last-Rev: 693c741c76
GitHub-Pull-Request: golang/go#62096
Reviewed-on: https://go-review.googlesource.com/c/go/+/520535
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Mateusz Poliwczak <mpoliwczak34@gmail.com>
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Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-10-31 19:22:19 +00:00
Russ Cox
8abde68f19 math/rand/v2: delete Mitchell/Reeds source
These slowdowns are because we are now using PCG instead of the
Mitchell/Reeds LFSR for the benchmarks. PCG is in fact a bit slower
(but generates statically far better random numbers).

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 01ff938549.amd64 │           afa459a2f0.amd64           │
                        │      sec/op      │    sec/op     vs base                │
PCG_DXSM-32                    1.490n ± 0%    1.488n ± 2%        ~ (p=0.408 n=20)
SourceUint64-32                1.352n ± 1%    1.450n ± 3%   +7.21% (p=0.000 n=20)
GlobalInt64-32                 2.083n ± 0%    2.067n ± 2%        ~ (p=0.223 n=20)
GlobalInt64Parallel-32        0.1035n ± 1%   0.1044n ± 2%        ~ (p=0.010 n=20)
GlobalUint64-32                2.038n ± 1%    2.085n ± 0%   +2.28% (p=0.000 n=20)
GlobalUint64Parallel-32       0.1006n ± 1%   0.1008n ± 1%        ~ (p=0.733 n=20)
Int64-32                       1.687n ± 2%    1.779n ± 1%   +5.48% (p=0.000 n=20)
Uint64-32                      1.674n ± 2%    1.854n ± 2%  +10.69% (p=0.000 n=20)
GlobalIntN1000-32              3.135n ± 1%    3.140n ± 3%        ~ (p=0.794 n=20)
IntN1000-32                    2.478n ± 1%    2.496n ± 1%   +0.73% (p=0.006 n=20)
Int64N1000-32                  2.455n ± 1%    2.510n ± 2%   +2.22% (p=0.000 n=20)
Int64N1e8-32                   2.467n ± 2%    2.471n ± 2%        ~ (p=0.050 n=20)
Int64N1e9-32                   2.454n ± 1%    2.488n ± 2%   +1.39% (p=0.000 n=20)
Int64N2e9-32                   2.482n ± 1%    2.478n ± 2%        ~ (p=0.066 n=20)
Int64N1e18-32                  3.349n ± 2%    3.088n ± 1%   -7.81% (p=0.000 n=20)
Int64N2e18-32                  3.537n ± 1%    3.493n ± 1%   -1.24% (p=0.002 n=20)
Int64N4e18-32                  4.917n ± 0%    5.060n ± 2%   +2.91% (p=0.000 n=20)
Int32N1000-32                  2.386n ± 1%    2.620n ± 1%   +9.76% (p=0.000 n=20)
Int32N1e8-32                   2.366n ± 1%    2.652n ± 0%  +12.11% (p=0.000 n=20)
Int32N1e9-32                   2.355n ± 2%    2.644n ± 1%  +12.32% (p=0.000 n=20)
Int32N2e9-32                   2.371n ± 1%    2.619n ± 2%  +10.48% (p=0.000 n=20)
Float32-32                     2.245n ± 2%    2.261n ± 1%        ~ (p=0.625 n=20)
Float64-32                     2.235n ± 1%    2.241n ± 2%        ~ (p=0.393 n=20)
ExpFloat64-32                  3.813n ± 3%    3.716n ± 1%   -2.53% (p=0.000 n=20)
NormFloat64-32                 3.652n ± 2%    3.718n ± 1%   +1.79% (p=0.006 n=20)
Perm3-32                       33.12n ± 3%    34.11n ± 2%        ~ (p=0.021 n=20)
Perm30-32                      205.1n ± 1%    200.6n ± 0%   -2.17% (p=0.000 n=20)
Perm30ViaShuffle-32            110.8n ± 1%    109.7n ± 1%   -0.99% (p=0.002 n=20)
ShuffleOverhead-32             113.0n ± 1%    107.2n ± 1%   -5.09% (p=0.000 n=20)
Concurrent-32                  2.100n ± 0%    2.108n ± 6%        ~ (p=0.103 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
                       │ 01ff938549.arm64 │           afa459a2f0.arm64           │
                       │      sec/op      │    sec/op     vs base                │
PCG_DXSM-8                    2.531n ± 0%    2.531n ± 0%        ~ (p=0.763 n=20)
SourceUint64-8                2.258n ± 1%    2.531n ± 0%  +12.09% (p=0.000 n=20)
GlobalInt64-8                 2.167n ± 0%    2.177n ± 1%        ~ (p=0.213 n=20)
GlobalInt64Parallel-8        0.4310n ± 0%   0.4319n ± 0%        ~ (p=0.027 n=20)
GlobalUint64-8                2.182n ± 1%    2.185n ± 1%        ~ (p=0.683 n=20)
GlobalUint64Parallel-8       0.4297n ± 0%   0.4295n ± 1%        ~ (p=0.941 n=20)
Int64-8                       2.472n ± 1%    4.104n ± 0%  +66.00% (p=0.000 n=20)
Uint64-8                      2.449n ± 1%    4.080n ± 0%  +66.60% (p=0.000 n=20)
GlobalIntN1000-8              2.814n ± 2%    2.814n ± 1%        ~ (p=0.972 n=20)
IntN1000-8                    2.998n ± 2%    4.140n ± 0%  +38.09% (p=0.000 n=20)
Int64N1000-8                  2.949n ± 2%    4.139n ± 0%  +40.35% (p=0.000 n=20)
Int64N1e8-8                   2.953n ± 2%    4.140n ± 0%  +40.22% (p=0.000 n=20)
Int64N1e9-8                   2.950n ± 0%    4.139n ± 0%  +40.32% (p=0.000 n=20)
Int64N2e9-8                   2.946n ± 2%    4.140n ± 0%  +40.53% (p=0.000 n=20)
Int64N1e18-8                  3.779n ± 1%    5.273n ± 0%  +39.52% (p=0.000 n=20)
Int64N2e18-8                  4.370n ± 1%    6.059n ± 0%  +38.65% (p=0.000 n=20)
Int64N4e18-8                  6.544n ± 1%    8.803n ± 0%  +34.52% (p=0.000 n=20)
Int32N1000-8                  2.950n ± 0%    4.131n ± 0%  +40.06% (p=0.000 n=20)
Int32N1e8-8                   2.950n ± 2%    4.131n ± 0%  +40.03% (p=0.000 n=20)
Int32N1e9-8                   2.951n ± 2%    4.131n ± 0%  +39.99% (p=0.000 n=20)
Int32N2e9-8                   2.950n ± 2%    4.131n ± 0%  +40.03% (p=0.000 n=20)
Float32-8                     3.441n ± 0%    4.110n ± 0%  +19.44% (p=0.000 n=20)
Float64-8                     3.442n ± 0%    4.104n ± 0%  +19.24% (p=0.000 n=20)
ExpFloat64-8                  4.481n ± 0%    5.338n ± 0%  +19.11% (p=0.000 n=20)
NormFloat64-8                 4.725n ± 0%    5.731n ± 0%  +21.28% (p=0.000 n=20)
Perm3-8                       26.55n ± 0%    26.62n ± 0%   +0.28% (p=0.000 n=20)
Perm30-8                      181.9n ± 0%    194.6n ± 2%   +6.98% (p=0.000 n=20)
Perm30ViaShuffle-8            142.9n ± 0%    156.4n ± 0%   +9.45% (p=0.000 n=20)
ShuffleOverhead-8             120.8n ± 2%    125.8n ± 0%   +4.10% (p=0.000 n=20)
Concurrent-8                  2.421n ± 6%    2.654n ± 6%   +9.67% (p=0.002 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 01ff938549.386 │            afa459a2f0.386             │
                        │     sec/op     │    sec/op     vs base                 │
PCG_DXSM-32                  7.613n ± 1%    7.793n ± 2%    +2.38% (p=0.000 n=20)
SourceUint64-32              2.069n ± 0%    7.680n ± 1%  +271.19% (p=0.000 n=20)
GlobalInt64-32               3.456n ± 1%    3.474n ± 3%         ~ (p=0.654 n=20)
GlobalInt64Parallel-32      0.3252n ± 0%   0.3253n ± 0%         ~ (p=0.952 n=20)
GlobalUint64-32              3.573n ± 1%    3.433n ± 2%    -3.92% (p=0.000 n=20)
GlobalUint64Parallel-32     0.3159n ± 0%   0.3156n ± 0%         ~ (p=0.223 n=20)
Int64-32                     2.562n ± 2%    7.707n ± 1%  +200.74% (p=0.000 n=20)
Uint64-32                    2.592n ± 0%    7.714n ± 1%  +197.65% (p=0.000 n=20)
GlobalIntN1000-32            6.266n ± 2%    6.236n ± 1%         ~ (p=0.039 n=20)
IntN1000-32                  4.724n ± 2%   10.410n ± 1%  +120.39% (p=0.000 n=20)
Int64N1000-32                5.490n ± 2%   10.975n ± 2%   +99.89% (p=0.000 n=20)
Int64N1e8-32                 5.513n ± 2%   10.980n ± 1%   +99.15% (p=0.000 n=20)
Int64N1e9-32                 5.476n ± 1%   10.950n ± 0%   +99.96% (p=0.000 n=20)
Int64N2e9-32                 5.501n ± 2%   11.110n ± 1%  +101.96% (p=0.000 n=20)
Int64N1e18-32                9.043n ± 2%   15.180n ± 2%   +67.86% (p=0.000 n=20)
Int64N2e18-32                9.601n ± 2%   15.610n ± 1%   +62.60% (p=0.000 n=20)
Int64N4e18-32                12.00n ± 1%    19.23n ± 2%   +60.14% (p=0.000 n=20)
Int32N1000-32                4.829n ± 2%   10.345n ± 1%  +114.25% (p=0.000 n=20)
Int32N1e8-32                 4.825n ± 2%   10.330n ± 1%  +114.09% (p=0.000 n=20)
Int32N1e9-32                 4.830n ± 2%   10.350n ± 1%  +114.26% (p=0.000 n=20)
Int32N2e9-32                 4.750n ± 2%   10.345n ± 1%  +117.81% (p=0.000 n=20)
Float32-32                   10.89n ± 4%    13.57n ± 1%   +24.61% (p=0.000 n=20)
Float64-32                   19.60n ± 4%    22.95n ± 4%   +17.12% (p=0.000 n=20)
ExpFloat64-32                12.96n ± 3%    15.23n ± 2%   +17.47% (p=0.000 n=20)
NormFloat64-32               7.516n ± 1%   13.780n ± 1%   +83.34% (p=0.000 n=20)
Perm3-32                     36.78n ± 2%    46.62n ± 2%   +26.72% (p=0.000 n=20)
Perm30-32                    238.9n ± 2%    400.7n ± 1%   +67.73% (p=0.000 n=20)
Perm30ViaShuffle-32          189.7n ± 2%    350.5n ± 1%   +84.79% (p=0.000 n=20)
ShuffleOverhead-32           159.8n ± 1%    326.0n ± 2%  +104.01% (p=0.000 n=20)
Concurrent-32                3.286n ± 1%    3.290n ± 0%         ~ (p=0.743 n=20)

On the other hand, compared to the original "update benchmarks" CL,
the cleanups we've made more than compensate for PCG being a bit
slower than LFSR, at least on 64-bit x86. ARM64 (Apple M1) is a bit
slower: perhaps the 64x64→128 multiply is slower there for some reason.
386 is noticeably slower, but it's also a non-SSA backend.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.amd64 │            afa459a2f0.amd64            │
                        │      sec/op      │    sec/op     vs base                  │
SourceUint64-32                1.555n ± 1%    1.450n ± 3%   -6.78% (p=0.000 n=20)
GlobalInt64-32                 2.071n ± 1%    2.067n ± 2%        ~ (p=0.673 n=20)
GlobalInt63Parallel-32        0.1023n ± 1%
GlobalInt64Parallel-32                       0.1044n ± 2%
GlobalUint64-32                5.193n ± 1%    2.085n ± 0%  -59.86% (p=0.000 n=20)
GlobalUint64Parallel-32       0.2341n ± 0%   0.1008n ± 1%  -56.93% (p=0.000 n=20)
Int64-32                       2.056n ± 2%    1.779n ± 1%  -13.47% (p=0.000 n=20)
Uint64-32                      2.077n ± 2%    1.854n ± 2%  -10.74% (p=0.000 n=20)
GlobalIntN1000-32              4.077n ± 2%    3.140n ± 3%  -22.98% (p=0.000 n=20)
IntN1000-32                    3.476n ± 2%    2.496n ± 1%  -28.19% (p=0.000 n=20)
Int64N1000-32                  3.059n ± 1%    2.510n ± 2%  -17.96% (p=0.000 n=20)
Int64N1e8-32                   2.942n ± 1%    2.471n ± 2%  -15.98% (p=0.000 n=20)
Int64N1e9-32                   2.932n ± 1%    2.488n ± 2%  -15.14% (p=0.000 n=20)
Int64N2e9-32                   2.925n ± 1%    2.478n ± 2%  -15.30% (p=0.000 n=20)
Int64N1e18-32                  3.116n ± 1%    3.088n ± 1%        ~ (p=0.013 n=20)
Int64N2e18-32                  4.067n ± 1%    3.493n ± 1%  -14.11% (p=0.000 n=20)
Int64N4e18-32                  4.054n ± 1%    5.060n ± 2%  +24.80% (p=0.000 n=20)
Int32N1000-32                  2.951n ± 1%    2.620n ± 1%  -11.22% (p=0.000 n=20)
Int32N1e8-32                   3.102n ± 1%    2.652n ± 0%  -14.50% (p=0.000 n=20)
Int32N1e9-32                   3.535n ± 1%    2.644n ± 1%  -25.20% (p=0.000 n=20)
Int32N2e9-32                   3.514n ± 1%    2.619n ± 2%  -25.47% (p=0.000 n=20)
Float32-32                     2.760n ± 1%    2.261n ± 1%  -18.06% (p=0.000 n=20)
Float64-32                     2.284n ± 1%    2.241n ± 2%        ~ (p=0.016 n=20)
ExpFloat64-32                  3.757n ± 1%    3.716n ± 1%        ~ (p=0.034 n=20)
NormFloat64-32                 3.837n ± 1%    3.718n ± 1%   -3.09% (p=0.000 n=20)
Perm3-32                       35.23n ± 2%    34.11n ± 2%   -3.19% (p=0.000 n=20)
Perm30-32                      208.8n ± 1%    200.6n ± 0%   -3.93% (p=0.000 n=20)
Perm30ViaShuffle-32            111.7n ± 1%    109.7n ± 1%   -1.84% (p=0.000 n=20)
ShuffleOverhead-32             101.1n ± 1%    107.2n ± 1%   +6.03% (p=0.000 n=20)
Concurrent-32                  2.108n ± 7%    2.108n ± 6%        ~ (p=0.644 n=20)
PCG_DXSM-32                                   1.488n ± 2%

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ 220860f76f.arm64 │            afa459a2f0.arm64            │
                       │      sec/op      │    sec/op     vs base                  │
SourceUint64-8                2.316n ± 1%    2.531n ± 0%   +9.33% (p=0.000 n=20)
GlobalInt64-8                 2.183n ± 1%    2.177n ± 1%        ~ (p=0.533 n=20)
GlobalInt63Parallel-8        0.4331n ± 0%
GlobalInt64Parallel-8                       0.4319n ± 0%
GlobalUint64-8                4.377n ± 2%    2.185n ± 1%  -50.07% (p=0.000 n=20)
GlobalUint64Parallel-8       0.9237n ± 0%   0.4295n ± 1%  -53.50% (p=0.000 n=20)
Int64-8                       2.538n ± 1%    4.104n ± 0%  +61.68% (p=0.000 n=20)
Uint64-8                      2.604n ± 1%    4.080n ± 0%  +56.68% (p=0.000 n=20)
GlobalIntN1000-8              3.857n ± 2%    2.814n ± 1%  -27.04% (p=0.000 n=20)
IntN1000-8                    3.822n ± 2%    4.140n ± 0%   +8.32% (p=0.000 n=20)
Int64N1000-8                  3.318n ± 0%    4.139n ± 0%  +24.74% (p=0.000 n=20)
Int64N1e8-8                   3.349n ± 1%    4.140n ± 0%  +23.64% (p=0.000 n=20)
Int64N1e9-8                   3.317n ± 2%    4.139n ± 0%  +24.80% (p=0.000 n=20)
Int64N2e9-8                   3.317n ± 2%    4.140n ± 0%  +24.81% (p=0.000 n=20)
Int64N1e18-8                  3.542n ± 1%    5.273n ± 0%  +48.85% (p=0.000 n=20)
Int64N2e18-8                  5.087n ± 0%    6.059n ± 0%  +19.12% (p=0.000 n=20)
Int64N4e18-8                  5.084n ± 0%    8.803n ± 0%  +73.16% (p=0.000 n=20)
Int32N1000-8                  3.208n ± 2%    4.131n ± 0%  +28.79% (p=0.000 n=20)
Int32N1e8-8                   3.610n ± 1%    4.131n ± 0%  +14.43% (p=0.000 n=20)
Int32N1e9-8                   4.235n ± 0%    4.131n ± 0%   -2.44% (p=0.000 n=20)
Int32N2e9-8                   4.229n ± 1%    4.131n ± 0%   -2.33% (p=0.000 n=20)
Float32-8                     3.468n ± 0%    4.110n ± 0%  +18.50% (p=0.000 n=20)
Float64-8                     3.447n ± 0%    4.104n ± 0%  +19.05% (p=0.000 n=20)
ExpFloat64-8                  4.567n ± 0%    5.338n ± 0%  +16.86% (p=0.000 n=20)
NormFloat64-8                 4.821n ± 0%    5.731n ± 0%  +18.89% (p=0.000 n=20)
Perm3-8                       28.89n ± 0%    26.62n ± 0%   -7.84% (p=0.000 n=20)
Perm30-8                      175.7n ± 0%    194.6n ± 2%  +10.76% (p=0.000 n=20)
Perm30ViaShuffle-8            153.5n ± 0%    156.4n ± 0%   +1.86% (p=0.000 n=20)
ShuffleOverhead-8             119.8n ± 1%    125.8n ± 0%   +4.97% (p=0.000 n=20)
Concurrent-8                  2.433n ± 3%    2.654n ± 6%   +9.13% (p=0.001 n=20)
PCG_DXSM-8                                   2.531n ± 0%

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.386 │             afa459a2f0.386              │
                        │     sec/op     │    sec/op     vs base                   │
SourceUint64-32             2.370n ±  1%    7.680n ± 1%  +224.05% (p=0.000 n=20)
GlobalInt64-32              3.569n ±  1%    3.474n ± 3%    -2.66% (p=0.001 n=20)
GlobalInt63Parallel-32     0.3221n ±  1%
GlobalInt64Parallel-32                     0.3253n ± 0%
GlobalUint64-32             8.797n ± 10%    3.433n ± 2%   -60.98% (p=0.000 n=20)
GlobalUint64Parallel-32    0.6351n ±  0%   0.3156n ± 0%   -50.31% (p=0.000 n=20)
Int64-32                    2.612n ±  2%    7.707n ± 1%  +195.04% (p=0.000 n=20)
Uint64-32                   3.350n ±  1%    7.714n ± 1%  +130.25% (p=0.000 n=20)
GlobalIntN1000-32           5.892n ±  1%    6.236n ± 1%    +5.82% (p=0.000 n=20)
IntN1000-32                 4.546n ±  1%   10.410n ± 1%  +128.97% (p=0.000 n=20)
Int64N1000-32               14.59n ±  1%    10.97n ± 2%   -24.75% (p=0.000 n=20)
Int64N1e8-32                14.76n ±  2%    10.98n ± 1%   -25.58% (p=0.000 n=20)
Int64N1e9-32                16.57n ±  1%    10.95n ± 0%   -33.90% (p=0.000 n=20)
Int64N2e9-32                14.54n ±  1%    11.11n ± 1%   -23.62% (p=0.000 n=20)
Int64N1e18-32               16.14n ±  1%    15.18n ± 2%    -5.95% (p=0.000 n=20)
Int64N2e18-32               18.10n ±  1%    15.61n ± 1%   -13.73% (p=0.000 n=20)
Int64N4e18-32               18.65n ±  1%    19.23n ± 2%    +3.08% (p=0.000 n=20)
Int32N1000-32               3.560n ±  1%   10.345n ± 1%  +190.55% (p=0.000 n=20)
Int32N1e8-32                3.770n ±  2%   10.330n ± 1%  +174.01% (p=0.000 n=20)
Int32N1e9-32                4.098n ±  0%   10.350n ± 1%  +152.53% (p=0.000 n=20)
Int32N2e9-32                4.179n ±  1%   10.345n ± 1%  +147.52% (p=0.000 n=20)
Float32-32                  21.18n ±  4%    13.57n ± 1%   -35.93% (p=0.000 n=20)
Float64-32                  20.60n ±  2%    22.95n ± 4%   +11.41% (p=0.000 n=20)
ExpFloat64-32               13.07n ±  0%    15.23n ± 2%   +16.48% (p=0.000 n=20)
NormFloat64-32              7.738n ±  2%   13.780n ± 1%   +78.08% (p=0.000 n=20)
Perm3-32                    36.73n ±  1%    46.62n ± 2%   +26.91% (p=0.000 n=20)
Perm30-32                   211.9n ±  1%    400.7n ± 1%   +89.05% (p=0.000 n=20)
Perm30ViaShuffle-32         165.2n ±  1%    350.5n ± 1%  +112.20% (p=0.000 n=20)
ShuffleOverhead-32          133.9n ±  1%    326.0n ± 2%  +143.37% (p=0.000 n=20)
Concurrent-32               3.287n ±  2%    3.290n ± 0%         ~ (p=0.365 n=20)
PCG_DXSM-32                                 7.793n ± 2%

For #61716.

Change-Id: I4e9c0525b5f84a2ac46f23da9e365495e2d05777
Reviewed-on: https://go-review.googlesource.com/c/go/+/502506
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-30 17:09:26 +00:00
Russ Cox
8631fcbf31 math/rand/v2: add PCG-DXSM
For the original math/rand, we ported Plan 9's random number
generator, which was a refinement by Ken Thompson of an algorithm
by Don Mitchell and Jim Reeds, which Mitchell in turn recalls as
having been derived from an algorithm by Marsaglia. At its core,
it is an additive lagged Fibonacci generator (ALFG).

Whatever the details of the history, this generator is nowhere
near the current state of the art for simple, pseudo-random
generators.

This CL adds an implementation of Melissa O'Neill's PCG, specifically
the variant PCG-DXSM, which she defined after writing the PCG paper
and which is now the default in Numpy. The update is slightly slower
(a few multiplies and adds, instead of a few adds), but the state
is dramatically smaller (2 words instead of 607). The statistical
output properties are better too.

A followup CL will delete the old generator.

PCG is the only change here, so no benchmarks should be affected.
Including them anyway as further evidence for caution.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 8993506f2f.amd64 │           01ff938549.amd64           │
                        │      sec/op      │    sec/op     vs base                │
SourceUint64-32                1.325n ± 1%    1.352n ± 1%   +2.00% (p=0.000 n=20)
GlobalInt64-32                 2.240n ± 1%    2.083n ± 0%   -7.03% (p=0.000 n=20)
GlobalInt64Parallel-32        0.1041n ± 1%   0.1035n ± 1%        ~ (p=0.064 n=20)
GlobalUint64-32                2.072n ± 3%    2.038n ± 1%        ~ (p=0.089 n=20)
GlobalUint64Parallel-32       0.1008n ± 1%   0.1006n ± 1%        ~ (p=0.804 n=20)
Int64-32                       1.716n ± 1%    1.687n ± 2%        ~ (p=0.045 n=20)
Uint64-32                      1.665n ± 1%    1.674n ± 2%        ~ (p=0.878 n=20)
GlobalIntN1000-32              3.335n ± 1%    3.135n ± 1%   -6.00% (p=0.000 n=20)
IntN1000-32                    2.484n ± 1%    2.478n ± 1%        ~ (p=0.085 n=20)
Int64N1000-32                  2.502n ± 2%    2.455n ± 1%   -1.88% (p=0.002 n=20)
Int64N1e8-32                   2.484n ± 2%    2.467n ± 2%        ~ (p=0.048 n=20)
Int64N1e9-32                   2.502n ± 0%    2.454n ± 1%   -1.92% (p=0.000 n=20)
Int64N2e9-32                   2.502n ± 0%    2.482n ± 1%   -0.76% (p=0.000 n=20)
Int64N1e18-32                  3.201n ± 1%    3.349n ± 2%   +4.62% (p=0.000 n=20)
Int64N2e18-32                  3.504n ± 1%    3.537n ± 1%        ~ (p=0.185 n=20)
Int64N4e18-32                  4.873n ± 1%    4.917n ± 0%   +0.90% (p=0.000 n=20)
Int32N1000-32                  2.639n ± 1%    2.386n ± 1%   -9.57% (p=0.000 n=20)
Int32N1e8-32                   2.686n ± 2%    2.366n ± 1%  -11.91% (p=0.000 n=20)
Int32N1e9-32                   2.636n ± 1%    2.355n ± 2%  -10.70% (p=0.000 n=20)
Int32N2e9-32                   2.660n ± 1%    2.371n ± 1%  -10.88% (p=0.000 n=20)
Float32-32                     2.261n ± 1%    2.245n ± 2%        ~ (p=0.752 n=20)
Float64-32                     2.280n ± 1%    2.235n ± 1%   -1.97% (p=0.007 n=20)
ExpFloat64-32                  3.891n ± 1%    3.813n ± 3%        ~ (p=0.087 n=20)
NormFloat64-32                 3.711n ± 1%    3.652n ± 2%        ~ (p=0.021 n=20)
Perm3-32                       32.60n ± 2%    33.12n ± 3%        ~ (p=0.107 n=20)
Perm30-32                      204.2n ± 0%    205.1n ± 1%        ~ (p=0.358 n=20)
Perm30ViaShuffle-32            121.7n ± 2%    110.8n ± 1%   -8.96% (p=0.000 n=20)
ShuffleOverhead-32             106.2n ± 2%    113.0n ± 1%   +6.36% (p=0.000 n=20)
Concurrent-32                  2.190n ± 5%    2.100n ± 0%   -4.13% (p=0.001 n=20)
PCG_DXSM-32                                   1.490n ± 0%

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ 8993506f2f.arm64 │           01ff938549.arm64           │
                       │      sec/op      │    sec/op     vs base                │
SourceUint64-8                2.271n ± 0%    2.258n ± 1%        ~ (p=0.167 n=20)
GlobalInt64-8                 2.161n ± 1%    2.167n ± 0%        ~ (p=0.693 n=20)
GlobalInt64Parallel-8        0.4303n ± 0%   0.4310n ± 0%        ~ (p=0.051 n=20)
GlobalUint64-8                2.164n ± 1%    2.182n ± 1%        ~ (p=0.042 n=20)
GlobalUint64Parallel-8       0.4287n ± 0%   0.4297n ± 0%        ~ (p=0.082 n=20)
Int64-8                       2.478n ± 1%    2.472n ± 1%        ~ (p=0.151 n=20)
Uint64-8                      2.460n ± 1%    2.449n ± 1%        ~ (p=0.013 n=20)
GlobalIntN1000-8              2.814n ± 2%    2.814n ± 2%        ~ (p=0.821 n=20)
IntN1000-8                    3.003n ± 2%    2.998n ± 2%        ~ (p=0.024 n=20)
Int64N1000-8                  2.954n ± 0%    2.949n ± 2%        ~ (p=0.192 n=20)
Int64N1e8-8                   2.956n ± 0%    2.953n ± 2%        ~ (p=0.109 n=20)
Int64N1e9-8                   3.325n ± 0%    2.950n ± 0%  -11.26% (p=0.000 n=20)
Int64N2e9-8                   2.956n ± 2%    2.946n ± 2%        ~ (p=0.027 n=20)
Int64N1e18-8                  3.780n ± 1%    3.779n ± 1%        ~ (p=0.815 n=20)
Int64N2e18-8                  4.385n ± 0%    4.370n ± 1%        ~ (p=0.402 n=20)
Int64N4e18-8                  6.527n ± 0%    6.544n ± 1%        ~ (p=0.140 n=20)
Int32N1000-8                  2.964n ± 1%    2.950n ± 0%   -0.47% (p=0.002 n=20)
Int32N1e8-8                   2.964n ± 1%    2.950n ± 2%        ~ (p=0.013 n=20)
Int32N1e9-8                   2.963n ± 2%    2.951n ± 2%        ~ (p=0.062 n=20)
Int32N2e9-8                   2.961n ± 2%    2.950n ± 2%   -0.37% (p=0.002 n=20)
Float32-8                     3.442n ± 0%    3.441n ± 0%        ~ (p=0.211 n=20)
Float64-8                     3.442n ± 0%    3.442n ± 0%        ~ (p=0.067 n=20)
ExpFloat64-8                  4.472n ± 0%    4.481n ± 0%   +0.20% (p=0.000 n=20)
NormFloat64-8                 4.734n ± 0%    4.725n ± 0%   -0.19% (p=0.003 n=20)
Perm3-8                       26.55n ± 0%    26.55n ± 0%        ~ (p=0.833 n=20)
Perm30-8                      181.9n ± 0%    181.9n ± 0%   -0.03% (p=0.004 n=20)
Perm30ViaShuffle-8            143.1n ± 0%    142.9n ± 0%        ~ (p=0.204 n=20)
ShuffleOverhead-8             120.6n ± 1%    120.8n ± 2%        ~ (p=0.102 n=20)
Concurrent-8                  2.357n ± 2%    2.421n ± 6%        ~ (p=0.016 n=20)
PCG_DXSM-8                                   2.531n ± 0%

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 8993506f2f.386 │           01ff938549.386            │
                        │     sec/op     │    sec/op     vs base               │
SourceUint64-32              2.102n ± 2%    2.069n ± 0%       ~ (p=0.021 n=20)
GlobalInt64-32               3.542n ± 2%    3.456n ± 1%  -2.44% (p=0.001 n=20)
GlobalInt64Parallel-32      0.3202n ± 0%   0.3252n ± 0%  +1.56% (p=0.000 n=20)
GlobalUint64-32              3.507n ± 1%    3.573n ± 1%  +1.87% (p=0.000 n=20)
GlobalUint64Parallel-32     0.3170n ± 1%   0.3159n ± 0%       ~ (p=0.167 n=20)
Int64-32                     2.516n ± 1%    2.562n ± 2%       ~ (p=0.016 n=20)
Uint64-32                    2.544n ± 1%    2.592n ± 0%  +1.85% (p=0.000 n=20)
GlobalIntN1000-32            6.237n ± 1%    6.266n ± 2%       ~ (p=0.268 n=20)
IntN1000-32                  4.670n ± 2%    4.724n ± 2%       ~ (p=0.644 n=20)
Int64N1000-32                5.412n ± 1%    5.490n ± 2%       ~ (p=0.159 n=20)
Int64N1e8-32                 5.414n ± 2%    5.513n ± 2%       ~ (p=0.129 n=20)
Int64N1e9-32                 5.473n ± 1%    5.476n ± 1%       ~ (p=0.723 n=20)
Int64N2e9-32                 5.487n ± 1%    5.501n ± 2%       ~ (p=0.481 n=20)
Int64N1e18-32                8.901n ± 2%    9.043n ± 2%       ~ (p=0.330 n=20)
Int64N2e18-32                9.521n ± 1%    9.601n ± 2%       ~ (p=0.703 n=20)
Int64N4e18-32                11.92n ± 1%    12.00n ± 1%       ~ (p=0.489 n=20)
Int32N1000-32                4.785n ± 1%    4.829n ± 2%       ~ (p=0.402 n=20)
Int32N1e8-32                 4.748n ± 1%    4.825n ± 2%       ~ (p=0.218 n=20)
Int32N1e9-32                 4.810n ± 1%    4.830n ± 2%       ~ (p=0.794 n=20)
Int32N2e9-32                 4.812n ± 1%    4.750n ± 2%       ~ (p=0.057 n=20)
Float32-32                   10.48n ± 4%    10.89n ± 4%       ~ (p=0.162 n=20)
Float64-32                   19.79n ± 3%    19.60n ± 4%       ~ (p=0.668 n=20)
ExpFloat64-32                12.91n ± 3%    12.96n ± 3%       ~ (p=1.000 n=20)
NormFloat64-32               7.462n ± 1%    7.516n ± 1%       ~ (p=0.051 n=20)
Perm3-32                     35.98n ± 2%    36.78n ± 2%       ~ (p=0.033 n=20)
Perm30-32                    241.5n ± 1%    238.9n ± 2%       ~ (p=0.126 n=20)
Perm30ViaShuffle-32          187.3n ± 2%    189.7n ± 2%       ~ (p=0.387 n=20)
ShuffleOverhead-32           160.2n ± 1%    159.8n ± 1%       ~ (p=0.256 n=20)
Concurrent-32                3.308n ± 3%    3.286n ± 1%       ~ (p=0.038 n=20)
PCG_DXSM-32                                 7.613n ± 1%

For #61716.

Change-Id: Icb274ca1f782504d658305a40159b4ae6a2f3f1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/502505
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Rob Pike <r@golang.org>
2023-10-30 17:09:23 +00:00
Russ Cox
c266587846 math/rand/v2: add, optimize N, UintN, Uint32N, Uint64N
Now that we can break the value stream, we can take advantage
of better algorithms that have been suggested since the original
code was written.

Also optimizes IntN, Int32N, Int64N, Perm (indirectly).

All the N variants (IntN, Int32N, Int64N, UintN, N, etc) now
return the same values given a Source and parameter n, so that
for example uint(r.IntN(10)) and r.UintN(10) and r.N(uint(10))
are completely interchangeable.

Int64N4e18 gets slower but that is a near worst case for
the algorithm and is extremely unlikely in practice.

32-bit Int32N variants got slower too, by 15-30%, in exchange
for speeding up everything on 64-bit systems and consistency
across the N functions.

Also rename previously missed benchmark
GlobalInt63Parallel to GlobalInt64Parallel.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 11ad9fdddc.amd64 │            4d84a369d1.amd64            │
                        │      sec/op      │    sec/op     vs base                  │
SourceUint64-32                1.335n ± 1%    1.348n ± 2%        ~ (p=0.335 n=20)
GlobalInt64-32                 2.046n ± 1%    2.082n ± 2%        ~ (p=0.310 n=20)
GlobalInt63Parallel-32        0.1037n ± 1%
GlobalInt64Parallel-32                       0.1036n ± 1%
GlobalUint64-32                2.075n ± 0%    2.077n ± 2%        ~ (p=0.228 n=20)
GlobalUint64Parallel-32       0.1013n ± 1%   0.1012n ± 1%        ~ (p=0.878 n=20)
Int64-32                       1.726n ± 2%    1.750n ± 0%   +1.39% (p=0.000 n=20)
Uint64-32                      1.673n ± 1%    1.707n ± 2%   +2.03% (p=0.002 n=20)
GlobalIntN1000-32              3.895n ± 2%    3.192n ± 1%  -18.05% (p=0.000 n=20)
IntN1000-32                    3.403n ± 1%    2.462n ± 2%  -27.65% (p=0.000 n=20)
Int64N1000-32                  3.053n ± 2%    2.470n ± 1%  -19.11% (p=0.000 n=20)
Int64N1e8-32                   2.718n ± 1%    2.503n ± 2%   -7.91% (p=0.000 n=20)
Int64N1e9-32                   2.712n ± 1%    2.487n ± 1%   -8.31% (p=0.000 n=20)
Int64N2e9-32                   2.690n ± 1%    2.487n ± 1%   -7.57% (p=0.000 n=20)
Int64N1e18-32                  3.084n ± 2%    3.006n ± 2%   -2.53% (p=0.000 n=20)
Int64N2e18-32                  4.026n ± 1%    3.368n ± 1%  -16.33% (p=0.000 n=20)
Int64N4e18-32                  4.049n ± 2%    4.763n ± 1%  +17.62% (p=0.000 n=20)
Int32N1000-32                  2.730n ± 0%    2.403n ± 1%  -11.94% (p=0.000 n=20)
Int32N1e8-32                   2.916n ± 2%    2.405n ± 1%  -17.53% (p=0.000 n=20)
Int32N1e9-32                   3.375n ± 1%    2.402n ± 2%  -28.83% (p=0.000 n=20)
Int32N2e9-32                   3.292n ± 1%    2.384n ± 1%  -27.58% (p=0.000 n=20)
Float32-32                     2.673n ± 1%    2.641n ± 2%        ~ (p=0.147 n=20)
Float64-32                     2.485n ± 1%    2.483n ± 1%        ~ (p=0.804 n=20)
ExpFloat64-32                  3.577n ± 2%    3.486n ± 2%   -2.57% (p=0.000 n=20)
NormFloat64-32                 3.797n ± 2%    3.648n ± 1%   -3.92% (p=0.000 n=20)
Perm3-32                       35.79n ± 2%    33.04n ± 1%   -7.68% (p=0.000 n=20)
Perm30-32                      205.1n ± 1%    171.9n ± 1%  -16.14% (p=0.000 n=20)
Perm30ViaShuffle-32            111.2n ± 2%    100.3n ± 1%   -9.76% (p=0.000 n=20)
ShuffleOverhead-32             100.5n ± 2%    102.5n ± 1%   +1.99% (p=0.007 n=20)
Concurrent-32                  2.188n ± 5%    2.101n ± 0%        ~ (p=0.013 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ 11ad9fdddc.arm64 │            4d84a369d1.arm64            │
                       │      sec/op      │    sec/op     vs base                  │
SourceUint64-8                2.272n ± 1%    2.261n ± 1%        ~ (p=0.172 n=20)
GlobalInt64-8                 2.155n ± 1%    2.160n ± 1%        ~ (p=0.482 n=20)
GlobalInt63Parallel-8        0.4352n ± 0%
GlobalInt64Parallel-8                       0.4299n ± 0%
GlobalUint64-8                2.173n ± 1%    2.169n ± 1%        ~ (p=0.262 n=20)
GlobalUint64Parallel-8       0.4340n ± 0%   0.4293n ± 1%   -1.08% (p=0.000 n=20)
Int64-8                       2.544n ± 1%    2.473n ± 1%   -2.83% (p=0.000 n=20)
Uint64-8                      2.552n ± 1%    2.453n ± 1%   -3.90% (p=0.000 n=20)
GlobalIntN1000-8              3.856n ± 0%    2.814n ± 2%  -27.02% (p=0.000 n=20)
IntN1000-8                    3.820n ± 0%    2.933n ± 2%  -23.22% (p=0.000 n=20)
Int64N1000-8                  3.219n ± 2%    2.934n ± 2%   -8.85% (p=0.000 n=20)
Int64N1e8-8                   3.221n ± 2%    2.935n ± 2%   -8.91% (p=0.000 n=20)
Int64N1e9-8                   3.276n ± 2%    2.934n ± 2%  -10.44% (p=0.000 n=20)
Int64N2e9-8                   3.217n ± 0%    2.935n ± 2%   -8.78% (p=0.000 n=20)
Int64N1e18-8                  3.502n ± 2%    3.778n ± 1%   +7.91% (p=0.000 n=20)
Int64N2e18-8                  4.968n ± 1%    4.359n ± 1%  -12.26% (p=0.000 n=20)
Int64N4e18-8                  4.963n ± 0%    6.546n ± 1%  +31.92% (p=0.000 n=20)
Int32N1000-8                  3.189n ± 1%    2.940n ± 2%   -7.81% (p=0.000 n=20)
Int32N1e8-8                   3.514n ± 1%    2.937n ± 2%  -16.41% (p=0.000 n=20)
Int32N1e9-8                   4.133n ± 0%    2.938n ± 0%  -28.91% (p=0.000 n=20)
Int32N2e9-8                   4.137n ± 0%    2.938n ± 2%  -28.97% (p=0.000 n=20)
Float32-8                     3.468n ± 1%    3.486n ± 0%   +0.52% (p=0.000 n=20)
Float64-8                     3.478n ± 0%    3.480n ± 0%        ~ (p=0.063 n=20)
ExpFloat64-8                  4.563n ± 0%    4.533n ± 0%   -0.67% (p=0.000 n=20)
NormFloat64-8                 4.768n ± 0%    4.764n ± 0%   -0.07% (p=0.001 n=20)
Perm3-8                       28.94n ± 0%    26.66n ± 0%   -7.88% (p=0.000 n=20)
Perm30-8                      175.9n ± 0%    143.4n ± 0%  -18.50% (p=0.000 n=20)
Perm30ViaShuffle-8            152.6n ± 1%    142.9n ± 0%   -6.29% (p=0.000 n=20)
ShuffleOverhead-8             119.6n ± 1%    120.7n ± 0%   +0.96% (p=0.000 n=20)
Concurrent-8                  2.452n ± 3%    2.360n ± 2%   -3.73% (p=0.007 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 11ad9fdddc.386 │             4d84a369d1.386             │
                        │     sec/op     │    sec/op     vs base                  │
SourceUint64-32              2.091n ± 1%    2.101n ± 2%        ~ (p=0.672 n=20)
GlobalInt64-32               3.514n ± 2%    3.518n ± 2%        ~ (p=0.723 n=20)
GlobalInt63Parallel-32      0.3197n ± 0%
GlobalInt64Parallel-32                     0.3206n ± 0%
GlobalUint64-32              3.542n ± 1%    3.538n ± 1%        ~ (p=0.304 n=20)
GlobalUint64Parallel-32     0.3218n ± 0%   0.3231n ± 0%        ~ (p=0.071 n=20)
Int64-32                     2.552n ± 2%    2.554n ± 2%        ~ (p=0.693 n=20)
Uint64-32                    2.566n ± 1%    2.575n ± 2%        ~ (p=0.606 n=20)
GlobalIntN1000-32            5.965n ± 2%    6.292n ± 1%   +5.46% (p=0.000 n=20)
IntN1000-32                  4.652n ± 1%    4.735n ± 1%   +1.77% (p=0.000 n=20)
Int64N1000-32               14.485n ± 1%    5.489n ± 2%  -62.11% (p=0.000 n=20)
Int64N1e8-32                14.675n ± 1%    5.528n ± 2%  -62.33% (p=0.000 n=20)
Int64N1e9-32                16.805n ± 2%    5.438n ± 2%  -67.64% (p=0.000 n=20)
Int64N2e9-32                14.515n ± 1%    5.474n ± 1%  -62.28% (p=0.000 n=20)
Int64N1e18-32               16.165n ± 1%    9.053n ± 1%  -44.00% (p=0.000 n=20)
Int64N2e18-32               17.945n ± 2%    9.685n ± 2%  -46.03% (p=0.000 n=20)
Int64N4e18-32                18.35n ± 2%    12.18n ± 1%  -33.62% (p=0.000 n=20)
Int32N1000-32                3.608n ± 1%    4.862n ± 1%  +34.77% (p=0.000 n=20)
Int32N1e8-32                 3.767n ± 1%    4.758n ± 2%  +26.31% (p=0.000 n=20)
Int32N1e9-32                 4.130n ± 2%    4.772n ± 1%  +15.54% (p=0.000 n=20)
Int32N2e9-32                 4.206n ± 1%    4.847n ± 0%  +15.24% (p=0.000 n=20)
Float32-32                   22.18n ± 4%    22.18n ± 4%        ~ (p=0.195 n=20)
Float64-32                   20.75n ± 4%    21.21n ± 3%        ~ (p=0.394 n=20)
ExpFloat64-32                12.58n ± 3%    12.39n ± 2%        ~ (p=0.032 n=20)
NormFloat64-32               7.920n ± 3%    7.422n ± 1%   -6.29% (p=0.000 n=20)
Perm3-32                     40.27n ± 1%    38.00n ± 2%   -5.65% (p=0.000 n=20)
Perm30-32                    213.2n ± 2%    212.7n ± 1%        ~ (p=0.995 n=20)
Perm30ViaShuffle-32          164.2n ± 2%    187.5n ± 2%  +14.22% (p=0.000 n=20)
ShuffleOverhead-32           134.7n ± 2%    159.7n ± 1%  +18.52% (p=0.000 n=20)
Concurrent-32                3.301n ± 2%    3.470n ± 0%   +5.10% (p=0.000 n=20)

For #61716.

Change-Id: Id1481b04202883cd0b23e21bb58d1bca4e482bd3
Reviewed-on: https://go-review.googlesource.com/c/go/+/502500
Reviewed-by: Rob Pike <r@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-30 17:08:37 +00:00
Russ Cox
c7dddb02d3 math/rand/v2: change Source to use uint64
This should make Uint64-using functions faster and leave
other things alone. It is a mystery why so much got faster.
A good cautionary tale not to read too much into minor
jitter in the benchmarks.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.amd64 │           11ad9fdddc.amd64           │
                        │      sec/op      │    sec/op     vs base                │
SourceUint64-32                1.555n ± 1%    1.335n ± 1%  -14.15% (p=0.000 n=20)
GlobalInt64-32                 2.071n ± 1%    2.046n ± 1%        ~ (p=0.016 n=20)
GlobalInt63Parallel-32        0.1023n ± 1%   0.1037n ± 1%   +1.37% (p=0.002 n=20)
GlobalUint64-32                5.193n ± 1%    2.075n ± 0%  -60.06% (p=0.000 n=20)
GlobalUint64Parallel-32       0.2341n ± 0%   0.1013n ± 1%  -56.74% (p=0.000 n=20)
Int64-32                       2.056n ± 2%    1.726n ± 2%  -16.10% (p=0.000 n=20)
Uint64-32                      2.077n ± 2%    1.673n ± 1%  -19.46% (p=0.000 n=20)
GlobalIntN1000-32              4.077n ± 2%    3.895n ± 2%   -4.45% (p=0.000 n=20)
IntN1000-32                    3.476n ± 2%    3.403n ± 1%   -2.10% (p=0.000 n=20)
Int64N1000-32                  3.059n ± 1%    3.053n ± 2%        ~ (p=0.131 n=20)
Int64N1e8-32                   2.942n ± 1%    2.718n ± 1%   -7.60% (p=0.000 n=20)
Int64N1e9-32                   2.932n ± 1%    2.712n ± 1%   -7.50% (p=0.000 n=20)
Int64N2e9-32                   2.925n ± 1%    2.690n ± 1%   -8.03% (p=0.000 n=20)
Int64N1e18-32                  3.116n ± 1%    3.084n ± 2%        ~ (p=0.425 n=20)
Int64N2e18-32                  4.067n ± 1%    4.026n ± 1%   -1.02% (p=0.007 n=20)
Int64N4e18-32                  4.054n ± 1%    4.049n ± 2%        ~ (p=0.204 n=20)
Int32N1000-32                  2.951n ± 1%    2.730n ± 0%   -7.49% (p=0.000 n=20)
Int32N1e8-32                   3.102n ± 1%    2.916n ± 2%   -6.03% (p=0.000 n=20)
Int32N1e9-32                   3.535n ± 1%    3.375n ± 1%   -4.54% (p=0.000 n=20)
Int32N2e9-32                   3.514n ± 1%    3.292n ± 1%   -6.30% (p=0.000 n=20)
Float32-32                     2.760n ± 1%    2.673n ± 1%   -3.13% (p=0.000 n=20)
Float64-32                     2.284n ± 1%    2.485n ± 1%   +8.80% (p=0.000 n=20)
ExpFloat64-32                  3.757n ± 1%    3.577n ± 2%   -4.78% (p=0.000 n=20)
NormFloat64-32                 3.837n ± 1%    3.797n ± 2%        ~ (p=0.204 n=20)
Perm3-32                       35.23n ± 2%    35.79n ± 2%        ~ (p=0.298 n=20)
Perm30-32                      208.8n ± 1%    205.1n ± 1%   -1.82% (p=0.000 n=20)
Perm30ViaShuffle-32            111.7n ± 1%    111.2n ± 2%        ~ (p=0.273 n=20)
ShuffleOverhead-32             101.1n ± 1%    100.5n ± 2%        ~ (p=0.878 n=20)
Concurrent-32                  2.108n ± 7%    2.188n ± 5%        ~ (p=0.417 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
                       │ 220860f76f.arm64 │           11ad9fdddc.arm64           │
                       │      sec/op      │    sec/op     vs base                │
SourceUint64-8                2.316n ± 1%    2.272n ± 1%   -1.86% (p=0.000 n=20)
GlobalInt64-8                 2.183n ± 1%    2.155n ± 1%        ~ (p=0.122 n=20)
GlobalInt63Parallel-8        0.4331n ± 0%   0.4352n ± 0%   +0.48% (p=0.000 n=20)
GlobalUint64-8                4.377n ± 2%    2.173n ± 1%  -50.35% (p=0.000 n=20)
GlobalUint64Parallel-8       0.9237n ± 0%   0.4340n ± 0%  -53.02% (p=0.000 n=20)
Int64-8                       2.538n ± 1%    2.544n ± 1%        ~ (p=0.189 n=20)
Uint64-8                      2.604n ± 1%    2.552n ± 1%   -1.98% (p=0.000 n=20)
GlobalIntN1000-8              3.857n ± 2%    3.856n ± 0%        ~ (p=0.051 n=20)
IntN1000-8                    3.822n ± 2%    3.820n ± 0%   -0.05% (p=0.001 n=20)
Int64N1000-8                  3.318n ± 0%    3.219n ± 2%   -2.98% (p=0.000 n=20)
Int64N1e8-8                   3.349n ± 1%    3.221n ± 2%   -3.79% (p=0.000 n=20)
Int64N1e9-8                   3.317n ± 2%    3.276n ± 2%   -1.24% (p=0.001 n=20)
Int64N2e9-8                   3.317n ± 2%    3.217n ± 0%   -3.01% (p=0.000 n=20)
Int64N1e18-8                  3.542n ± 1%    3.502n ± 2%   -1.16% (p=0.001 n=20)
Int64N2e18-8                  5.087n ± 0%    4.968n ± 1%   -2.33% (p=0.000 n=20)
Int64N4e18-8                  5.084n ± 0%    4.963n ± 0%   -2.39% (p=0.000 n=20)
Int32N1000-8                  3.208n ± 2%    3.189n ± 1%   -0.58% (p=0.001 n=20)
Int32N1e8-8                   3.610n ± 1%    3.514n ± 1%   -2.67% (p=0.000 n=20)
Int32N1e9-8                   4.235n ± 0%    4.133n ± 0%   -2.40% (p=0.000 n=20)
Int32N2e9-8                   4.229n ± 1%    4.137n ± 0%   -2.19% (p=0.000 n=20)
Float32-8                     3.468n ± 0%    3.468n ± 1%        ~ (p=0.350 n=20)
Float64-8                     3.447n ± 0%    3.478n ± 0%   +0.90% (p=0.000 n=20)
ExpFloat64-8                  4.567n ± 0%    4.563n ± 0%   -0.10% (p=0.002 n=20)
NormFloat64-8                 4.821n ± 0%    4.768n ± 0%   -1.09% (p=0.000 n=20)
Perm3-8                       28.89n ± 0%    28.94n ± 0%   +0.17% (p=0.000 n=20)
Perm30-8                      175.7n ± 0%    175.9n ± 0%   +0.14% (p=0.000 n=20)
Perm30ViaShuffle-8            153.5n ± 0%    152.6n ± 1%        ~ (p=0.010 n=20)
ShuffleOverhead-8             119.8n ± 1%    119.6n ± 1%        ~ (p=0.147 n=20)
Concurrent-8                  2.433n ± 3%    2.452n ± 3%        ~ (p=0.616 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.386 │            11ad9fdddc.386            │
                        │     sec/op     │    sec/op     vs base                │
SourceUint64-32             2.370n ±  1%    2.091n ± 1%  -11.75% (p=0.000 n=20)
GlobalInt64-32              3.569n ±  1%    3.514n ± 2%   -1.56% (p=0.000 n=20)
GlobalInt63Parallel-32     0.3221n ±  1%   0.3197n ± 0%   -0.76% (p=0.000 n=20)
GlobalUint64-32             8.797n ± 10%    3.542n ± 1%  -59.74% (p=0.000 n=20)
GlobalUint64Parallel-32    0.6351n ±  0%   0.3218n ± 0%  -49.33% (p=0.000 n=20)
Int64-32                    2.612n ±  2%    2.552n ± 2%   -2.30% (p=0.000 n=20)
Uint64-32                   3.350n ±  1%    2.566n ± 1%  -23.42% (p=0.000 n=20)
GlobalIntN1000-32           5.892n ±  1%    5.965n ± 2%        ~ (p=0.082 n=20)
IntN1000-32                 4.546n ±  1%    4.652n ± 1%   +2.33% (p=0.000 n=20)
Int64N1000-32               14.59n ±  1%    14.48n ± 1%        ~ (p=0.652 n=20)
Int64N1e8-32                14.76n ±  2%    14.67n ± 1%        ~ (p=0.836 n=20)
Int64N1e9-32                16.57n ±  1%    16.80n ± 2%        ~ (p=0.016 n=20)
Int64N2e9-32                14.54n ±  1%    14.52n ± 1%        ~ (p=0.533 n=20)
Int64N1e18-32               16.14n ±  1%    16.16n ± 1%        ~ (p=0.606 n=20)
Int64N2e18-32               18.10n ±  1%    17.95n ± 2%        ~ (p=0.062 n=20)
Int64N4e18-32               18.65n ±  1%    18.35n ± 2%   -1.61% (p=0.010 n=20)
Int32N1000-32               3.560n ±  1%    3.608n ± 1%   +1.33% (p=0.001 n=20)
Int32N1e8-32                3.770n ±  2%    3.767n ± 1%        ~ (p=0.155 n=20)
Int32N1e9-32                4.098n ±  0%    4.130n ± 2%        ~ (p=0.016 n=20)
Int32N2e9-32                4.179n ±  1%    4.206n ± 1%        ~ (p=0.011 n=20)
Float32-32                  21.18n ±  4%    22.18n ± 4%   +4.70% (p=0.003 n=20)
Float64-32                  20.60n ±  2%    20.75n ± 4%   +0.73% (p=0.000 n=20)
ExpFloat64-32               13.07n ±  0%    12.58n ± 3%   -3.82% (p=0.000 n=20)
NormFloat64-32              7.738n ±  2%    7.920n ± 3%        ~ (p=0.066 n=20)
Perm3-32                    36.73n ±  1%    40.27n ± 1%   +9.65% (p=0.000 n=20)
Perm30-32                   211.9n ±  1%    213.2n ± 2%        ~ (p=0.262 n=20)
Perm30ViaShuffle-32         165.2n ±  1%    164.2n ± 2%        ~ (p=0.029 n=20)
ShuffleOverhead-32          133.9n ±  1%    134.7n ± 2%        ~ (p=0.551 n=20)
Concurrent-32               3.287n ±  2%    3.301n ± 2%        ~ (p=0.330 n=20)

For #61716.

Change-Id: I8d2f73f87dd3603a0c2ff069988938e0957b6904
Reviewed-on: https://go-review.googlesource.com/c/go/+/502499
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Rob Pike <r@golang.org>
2023-10-30 17:08:34 +00:00
Russ Cox
1cc5b34d28 math/rand/v2: remove Rand.Seed
Removing Rand.Seed lets us remove lockedSource as well,
along with the ambiguity in globalRand about which source
to use.

For #61716.

Change-Id: Ibe150520dd1e7dd87165eacaebe9f0c2daeaedfd
Reviewed-on: https://go-review.googlesource.com/c/go/+/502498
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Rob Pike <r@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>
2023-10-30 14:31:46 +00:00
Russ Cox
d6c1ef52ad math/rand/v2: remove Read
In math/rand, Read is deprecated. Remove in v2.
People should use crypto/rand if they need long strings.

For #61716.

Change-Id: Ib254b7e1844616e96db60a3a7abb572b0dcb1583
Reviewed-on: https://go-review.googlesource.com/c/go/+/502497
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-30 14:30:14 +00:00
Russ Cox
d42750b17c math/rand/v2: rename various functions
Int31 -> Int32
Int31n -> Int32N
Int63 -> Int64
Int63n -> Int64N
Intn -> IntN

The 31 and 63 are pedantic and confusing: the functions should
be named for the type they return, same as all the others.

The lower-case n is inconsistent with Go's usual CamelCase
and especially problematic because we plan to add 'func N'.
Capitalize the n.

For #61716.

Change-Id: Idb1a005a82f353677450d47fb612ade7a41fde69
Reviewed-on: https://go-review.googlesource.com/c/go/+/516857
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-30 14:29:37 +00:00
Russ Cox
59f0ab4036 math/rand/v2: start of new API
This is the beginning of the math/rand/v2 package from proposal #61716.
Start by copying old API. This CL copies math/rand/* to math/rand/v2
and updates references to math/rand to add v2 throughout.
Later CLs will make the v2 changes.

For #61716.

Change-Id: I1624ccffae3dfa442d4ba2461942decbd076e11b
Reviewed-on: https://go-review.googlesource.com/c/go/+/502495
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2023-10-30 14:29:30 +00:00
Carlo Alberto Ferraris
1ce8a3f081 io: add (*SectionReader).Outer()
Fixes #61870
Updates #61727

Change-Id: Iaef9b59c402d68f6bf64be212db2b6746abe8900
Reviewed-on: https://go-review.googlesource.com/c/go/+/526855
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2023-10-09 22:04:41 +00:00
Roland Shoemaker
c9c885f92f html/template: support parsing complex JS template literals
This change undoes the restrictions added in CL 482079, which added a
blanket ban on using actions within JS template literal strings, and
adds logic to support actions while properly applies contextual escaping
based on the correct context within the literal.

Since template literals can contain both normal strings, and nested JS
contexts, logic is required to properly track those context switches
during parsing.

ErrJsTmplLit is deprecated, and the GODEBUG flag jstmpllitinterp no
longer does anything.

Fixes #61619

Change-Id: I0338cc6f663723267b8f7aaacc55aa28f60906f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/507995
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2023-10-02 15:18:39 +00:00
Carl Johnson
80e642cb7a cmp: add Or
Fixes #60204

Change-Id: I1234cacf0f25097d034038bcfb33f6630373a057
GitHub-Last-Rev: e9098ed8b3
GitHub-Pull-Request: golang/go#60931
Reviewed-on: https://go-review.googlesource.com/c/go/+/504883
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: qiulaidongfeng <2645477756@qq.com>
2023-09-25 14:30:20 +00:00
Jonathan Amsterdam
495830acd6 net/http: implement path value methods on Request
Add Request.PathValue and Request.SetPathValue,
and the fields on Request required to support them.

Populate those fields in ServeMux.ServeHTTP.

Updates #61410.

Change-Id: Ic88cb865b0d865a30d3b35ece8e0382c58ef67d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/528355
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2023-09-14 00:00:28 +00:00
Mauri de Souza Meneguzzo
e5600f063d archive/tar: add AddFS method to Writer
The method AddFS can be used to add the contents of a fs.FS filesystem
to a tar archive. This method walks the directory tree starting at the root
of the filesystem and adds each file to the archive.

Fixes #58000

Change-Id: I0e6abac76b76bc5d95b74b7e5b37634ce3f76c85
GitHub-Last-Rev: 11a62bfd7e
GitHub-Pull-Request: golang/go#61599
Reviewed-on: https://go-review.googlesource.com/c/go/+/513316
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
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2023-09-13 13:59:01 +00:00
David Anderson
94f24fd054 net/netip: add AddrPort.Compare and Prefix.Compare
Fixes #61642

Change-Id: I2262855dbe75135f70008e5df4634d2cfff76550
GitHub-Last-Rev: 949685a9e4
GitHub-Pull-Request: golang/go#62387
Reviewed-on: https://go-review.googlesource.com/c/go/+/524616
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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2023-09-11 20:26:41 +00:00
Jonathan Amsterdam
a742ae493f testing/slogtest: add Run to run cases as subtests
This is an implementation of proposal #61758.

It adds a function to slogtest that runs each test case in a subtest,
instead of running them all at once.

That allows the caller to control which cases are run.

Fixes #61706.
Fixes #61758.

Change-Id: I95108b7b753675203ca7f0f00ccbc242bd9c2a9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/516076
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2023-09-08 20:37:12 +00:00
Joel Sing
1152615d20 debug/elf,cmd/link: add additional MIPS64 relocation type
Add R_MIPS_PC32 which is a 32 bit PC relative relocation.

These are produced by LLVM on mips64.

Fixes #61974

Change-Id: I7b6c6848e40249e6d5ea474ea53c9d7e3ab23f88
Reviewed-on: https://go-review.googlesource.com/c/go/+/469395
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
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2023-09-08 04:32:10 +00:00
Kir Kolyshkin
da7ee57f40 syscall: add support to get pidfd from ForkExec on Linux
Add PidFD support, so that if the PidFD pointer in SysProcAttr is not
nil, ForkExec (and thus all its users) obtains a pidfd from the kernel
during clone(), and writes the result (or -1, if the functionality
is not supported by the kernel) into *PidFD.

The functionality to get pidfd is implemented for both clone3 and clone.
For the latter, an extra argument to rawVforkSyscall is needed, thus the
change in asm files.

Add a trivial test case checking the obtained pidfd can be used to send
a signal to a process, using pidfd_send_signal. To test clone3 code path,
add a flag available to tests only.

Updates #51246.

Change-Id: I2212b69e1a657163c31b4a6245b076bc495777a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/520266
Auto-Submit: Ian Lance Taylor <iant@google.com>
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2023-09-07 19:11:15 +00:00
Joe Tsai
469d9e26ee encoding: add AppendEncode and AppendDecode
Implement append-like equivalent of Encode and Decode functions.

Fixes #53693

Change-Id: I79d8d834e3c8f77fad32be2fd391e33d4d1527ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/504884
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2023-08-17 16:23:42 +00:00
Carl Johnson
2c95fa4f31 slices: add Concat
Fixes #56353

Change-Id: I985e1553e7b02237403b833e96fb5ceec890f5b8
GitHub-Last-Rev: 96a35e524c
GitHub-Pull-Request: golang/go#60929
Reviewed-on: https://go-review.googlesource.com/c/go/+/504882
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2023-08-08 14:31:39 +00:00
Mauri de Souza Meneguzzo
65d4723b49 net/http: add ServeFileFS, FileServerFS, NewFileTransportFS
These new apis are analogous to ServeFile, FileServer and NewFileTransport respectively. The main difference is that these functions operate on an fs.FS.

Fixes #51971

Change-Id: Ie56b245b795eeb7edf613657578592306945469b
GitHub-Last-Rev: 26e75c0368
GitHub-Pull-Request: golang/go#61641
Reviewed-on: https://go-review.googlesource.com/c/go/+/513956
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2023-08-07 17:07:12 +00:00
Inada Naoki
8a6acecfab database/sql: add Null[T]
Generic version of NullString, NullInt64, etc.

Fixes #60370

Change-Id: I166a05a6126e8b8571db5cbb026303bb6551d56b
GitHub-Last-Rev: 3c8d2d5141
GitHub-Pull-Request: golang/go#60677
Reviewed-on: https://go-review.googlesource.com/c/go/+/501700
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2023-08-07 14:26:37 +00:00
Alan Donovan
6f1b895daf go/ast: deprecate Object
The following declarations related to syntactic object resolution
are now deprecated:
- Ident.Obj
- Object
- Scope
- File.{Scope,Unresolved}
- Importer
- Package, NewPackage
New programs should use the type checker instead.

Updates golang/go#52463
Updates golang/go#48141

Change-Id: I82b315f49b1341c11ae20dcbf81106084bd2ba86
Reviewed-on: https://go-review.googlesource.com/c/go/+/504915
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2023-08-07 09:39:17 +00:00
qiulaidongfeng
834a3f844a archive/tar: add FileInfoNames interface
An optional interface FileInfoNames has been added.

If the parameter fi of FileInfoHeader implements the interface
the Gname and Uname of the return value Header are
provided by the method of the interface.

Also added testing.

Fixes #50102

Change-Id: I6fd06c7c9aaf29b22b7384542fe57affed33009a

Change-Id: I6fd06c7c9aaf29b22b7384542fe57affed33009a
GitHub-Last-Rev: 5e82257948
GitHub-Pull-Request: golang/go#61662
Reviewed-on: https://go-review.googlesource.com/c/go/+/514235
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2023-08-07 00:25:25 +00:00
Damien Neil
a915b999c9 crypto/tls: change SendSessionTicket to take an options struct
To allow for future evolution of the API, make
QUICConn.SendSessionTicket take a QUICSessionTicketOptions
rather than a single bool.

For #60107

Change-Id: I798fd0feec5c7581e3c3574e2de99611c81df47f
Reviewed-on: https://go-review.googlesource.com/c/go/+/514997
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2023-08-02 17:14:49 +00:00
Mauri de Souza Meneguzzo
845fff35c6 archive/zip: add AddFS method to zip Writer
The method AddFS can be used to add the contents of a fs.FS filesystem
to a zip archive.
This method walks the directory tree starting at the root of the filesystem
and adds each file to the archive.

Fixes #54898

Change-Id: I80511cbd91a1d7e09ee52d2d1b09fb5eed25f45f
GitHub-Last-Rev: 1e17f2e6ba
GitHub-Pull-Request: golang/go#61602
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2023-07-31 18:10:41 +00:00
Carl Johnson
42d2dfb430 reflect: add TypeFor
Fixes #60088

Change-Id: I7b43d329def22c2524501ba1d6bfc73becc823d1
GitHub-Last-Rev: becd714c45
GitHub-Pull-Request: golang/go#61598
Reviewed-on: https://go-review.googlesource.com/c/go/+/513478
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2023-07-31 15:50:15 +00:00
qiulaidongfeng
93ec88160e reflect: deprecate PtrTo
Replace reflect.PtrTo with reflect.PointerTo.

Fixes #59599

Change-Id: I49407193e2050543ef983cd637703acc682d9f51

Change-Id: I49407193e2050543ef983cd637703acc682d9f51
GitHub-Last-Rev: 7bc9ccf1dc
GitHub-Pull-Request: golang/go#61440
Reviewed-on: https://go-review.googlesource.com/c/go/+/511035
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2023-07-27 23:28:51 +00:00
Ian Lance Taylor
598958f0f2 maps: remove Keys and Values
Preserve the names in case we want them to return an iterator.
Keep the efficient runtime implementations for now,
as we will probably want them under some name, perhaps KeysSlice
and ValuesSlice.

Fixes #61538

Change-Id: I6b03010bf071fb4531cb2f967dad46425962fcb8
Reviewed-on: https://go-review.googlesource.com/c/go/+/513476
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2023-07-26 21:40:38 +00:00
Alan Donovan
e201ff2b98 go/ast: add Unparen(Expr) helper
Fixes #60061

Change-Id: If1bc03f9367620c9ea8702bfd4648020d5ab52ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/495315
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2023-07-20 20:19:51 +00:00
Jonathan Amsterdam
3f8b04bfb5 log/slog: change XXXCtx functions to XXXContext
Fixes #61200.

Change-Id: I3071dbf673bcd2d24e62644b40d481c953703978
Reviewed-on: https://go-review.googlesource.com/c/go/+/508195
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2023-07-11 16:33:46 +00:00
Russ Cox
b490bdc27d go/types: record Config.GoVersion for reporting in Package.GoVersion method
Clients of go/types, such as analyzers, may need to know which
specific Go version a package is written for. Record that information
in the Package and expose it using the new GoVersion method.

Update parseGoVersion to handle the new Go versions that may
be passed around starting in Go 1.21.0: versions like "go1.21.0"
and "go1.21rc2". This is not strictly necessary today, but it adds some
valuable future-proofing.

While we are here, change NewChecker from panicking on invalid
version to saving an error for returning later from Files.
Go versions are now likely to be coming from a variety of sources,
not just hard-coded in calls to NewChecker, making a panic
inappropriate.

For #61174.
Fixes #61175.

Change-Id: Ibe41fe207c1b6e71064b1fe448ac55776089c541
Reviewed-on: https://go-review.googlesource.com/c/go/+/507975
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2023-07-06 13:09:19 +00:00
Ian Lance Taylor
0a48e5cbfa slices: consistently use S ~[]E
Make all functions use a constraint S ~[]E even if they don't return
the slice type. This makes explicitly instantiating the functions more
consistent: you don't have to remember which take ~[]E and which do not.
It also permits inferring the type when passing one of these functions
to some other function that is using a named slice type.

Fixes #60546

Change-Id: Ib3435255d0177fdbf03455ae527d08599b1ce012
Reviewed-on: https://go-review.googlesource.com/c/go/+/502955
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Reviewed-by: Eli Bendersky <eliben@google.com>
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2023-06-14 17:09:34 +00:00
Filippo Valsorda
6801c27837 crypto/tls: make SessionState.Extra a slice of byte slices
Fixes #60539
Updates #60105

Change-Id: I7b567cc1d0901891ed97d29591db935cd487cc71
Reviewed-on: https://go-review.googlesource.com/c/go/+/501675
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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2023-06-09 15:26:32 +00:00
Alan Donovan
fdbc66d6dd math/big: rename Int.ToFloat64 to Float64
The "To" prefix was a relic of the first draft
that I failed to make consistent with the unprefixed
name used in the proposal. Fortunately iant spotted
it during the API audit.

Updates #56984
Updates #60560

Change-Id: Ifa6eeddf6dd5f0637c0568e383f9a4bef88b10f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/500116
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2023-06-02 14:22:24 +00:00
Michael Anthony Knyszek
a38a0839bd api: promote next to go1.21
Change-Id: I30cbd14bd2b3903d7960c5d860d76ce7f3d4730a
Reviewed-on: https://go-review.googlesource.com/c/go/+/499981
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2023-06-01 20:02:28 +00:00
Ian Lance Taylor
bf14663943 Revert "math: add Compare and Compare32"
This reverts CL 467515. Now that we have cmp.Compare,
we don't need math.Compare or math.Compare32 after all.

For #56491
Fixes #60519

Change-Id: I8ed33464adfc6d69bd6b328edb26aa2ee3d234d9
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2023-05-31 21:19:39 +00:00
Filippo Valsorda
b267db08b2 crypto/tls: add VersionName
Fixes #46308

Change-Id: I5162b26cbce61ae5df5d2e093cf8a28406d15863
Reviewed-on: https://go-review.googlesource.com/c/go/+/497377
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2023-05-25 00:13:32 +00:00
Filippo Valsorda
4406ed6d4e crypto/tls: implement Extended Master Secret
All OpenSSL tests now test operation with EMS. To test a handshake
*without* EMS we need to pass -Options=-ExtendedMasterSecret which is
only available in OpenSSL 3.1, which breaks a number of other tests.

Updates #43922

Change-Id: Ib9ac79a1d03fab6bfba5fe9cd66689cff661cda7
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2023-05-25 00:13:30 +00:00
Filippo Valsorda
869da4a2a4 crypto/tls: add QUIC 0-RTT APIs
Fixes #60107

Change-Id: I158b1c2d80d8ebb5ed7a8e6f313f69060754e220
Reviewed-on: https://go-review.googlesource.com/c/go/+/496995
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2023-05-25 00:13:28 +00:00
Filippo Valsorda
2a4f4fc525 crypto/tls: add SessionState.Extra
This can be used by applications to store additional data in a session.

Fixes #57753
For #60105

Change-Id: Ib42387ad64750fa8dbbdf51de5e9c86378bef0ee
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2023-05-24 23:57:01 +00:00
Filippo Valsorda
6824765b4b crypto/tls: add WrapSession and UnwrapSession
There was a bug in TestResumption: the first ExpiredSessionTicket was
inserting a ticket far in the future, so the second ExpiredSessionTicket
wasn't actually supposed to fail. However, there was a bug in
checkForResumption->sendSessionTicket, too: if a session was not resumed
because it was too old, its createdAt was still persisted in the next
ticket. The two bugs used to cancel each other out.

For #60105
Fixes #19199

Change-Id: Ic9b2aab943dcbf0de62b8758a6195319dc286e2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/496821
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2023-05-24 23:56:55 +00:00
Filippo Valsorda
371ebe731b crypto/tls: add ClientSessionState.ResumptionState and NewResumptionState
For #60105
Fixes #25351

Change-Id: Iffd658f2663cfc47b48157824226ed6c0260a59e
Reviewed-on: https://go-review.googlesource.com/c/go/+/496820
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Reviewed-by: Marten Seemann <martenseemann@gmail.com>
2023-05-24 23:56:48 +00:00
Filippo Valsorda
9624e67fd2 crypto/tls: add SessionState and use it on the server side
This change by itself is useless, because the application has no way to
access or provide SessionStates to crypto/tls, but they will be provided
in following CLs.

For #60105

Change-Id: I8d5de79b1eda0a778420134cf6f346246a1bb296
Reviewed-on: https://go-review.googlesource.com/c/go/+/496818
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
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2023-05-24 23:56:32 +00:00
Damien Neil
2cac7e89da crypto/tls: support QUIC as a transport
Add a QUICConn type for use by QUIC implementations.

A QUICConn provides unencrypted handshake bytes and connection
secrets to the QUIC layer, and receives handshake bytes.

For #44886

Change-Id: I859dda4cc6d466a1df2fb863a69d3a2a069110d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/493655
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Reviewed-by: Marten Seemann <martenseemann@gmail.com>
2023-05-24 22:40:18 +00:00
Eli Bendersky
0df6812488 slices: add sorting and comparison functions
Now that the `cmp` package exists, sorting and comparison functions from
`x/exp/slices` can be ported to the standard library, using the
`cmp.Ordered` type and the `cmp.Less` and `cmp.Compare` functions.

This move also includes adjustments to the discussions in #60091 w.r.t.
NaN handling and cmp vs. less functions, and adds Min/Max functions.
The final API is taken from
https://github.com/golang/go/issues/60091#issuecomment-1553850782

Updates #60091

Change-Id: Id7e6c88035b60d4ddd0c48dd82add8e8bc4e22d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/496078
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2023-05-23 23:33:29 +00:00
Paul E. Murphy
26f25692b8 debug/elf: define R_PPC64_REL24_P9NOTOC
This relocation is not (yet?) defined in ELFv2, but has been added to
gnu gas a couple years ago. It is the same reloc as
R_PPC64_REL24_NOTOC, but hints power10 instructions should not be
emitted.

See binutils commit 7aba54da426b9999085d8f84e7896b8afdbb9ca6.

Fixes #60348

Change-Id: Ie953cd7bf1ffc621b498d4dbebb5de1231833c8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/496918
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2023-05-23 21:46:00 +00:00
Ian Lance Taylor
dc4993e7c6 cmp: new package
The new cmp package provides types and functions related to
comparing ordered values.

For #59488

Change-Id: I43f4b2e6036f63b87c2152672d2b6fa18235cbeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/496356
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2023-05-19 17:41:52 +00:00
cuiweixie
944911af56 html/template: expose ErrJSTemplate
Fixes #59584

Change-Id: Iabe61476c7457dfffbfe5d0b1fe904901a466c73
Reviewed-on: https://go-review.googlesource.com/c/go/+/496395
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Reviewed-by: Roland Shoemaker <roland@golang.org>
2023-05-19 16:51:35 +00:00
Sven Anderson
251daf46fb runtime: implement Pinner API for object pinning
Some C APIs require the use or structures that contain pointers to
buffers (iovec, io_uring, ...).  The pointer passing rules would
require that these buffers are allocated in C memory and to process
this data with Go libraries it would need to be copied.

In order to provide a zero-copy way to use these C APIs, this CL
implements a Pinner API that allows to pin Go objects, which
guarantees that the garbage collector does not move these objects
while pinned.  This allows to relax the pointer passing rules so that
pinned pointers can be stored in C allocated memory or can be
contained in Go memory that is passed to C functions.

The Pin() method accepts pointers to objects of any type and
unsafe.Pointer.  Slices and arrays can be pinned by calling Pin()
with the pointer to the first element.  Pinning of maps is not
supported.

If the GC collects unreachable Pinner holding pinned objects it
panics.  If Pin() is called with the other non-pointer types it
panics as well.

Performance considerations: This change has no impact on execution
time on existing code, because checks are only done in code paths,
that would panic otherwise.  The memory footprint on existing code is
one pointer per memory span.

Fixes: #46787

Signed-off-by: Sven Anderson <sven@anderson.de>
Change-Id: I110031fe789b92277ae45a9455624687bd1c54f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/367296
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2023-05-19 14:59:14 +00:00
Alan Donovan
3ca52f4c31 slices: add in-place Reverse function
Fixes #58565

Change-Id: I583f8380c12386178fb18e553322bbb019d9fae0
Reviewed-on: https://go-review.googlesource.com/c/go/+/468855
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2023-05-19 00:43:02 +00:00
Ian Lance Taylor
3d33532d1c net/http: let ErrNotSupported match errors.ErrUnsupported
For #41198

Change-Id: Ibb030e94618a1f594cfd98ddea214ad7a88d2e73
Reviewed-on: https://go-review.googlesource.com/c/go/+/494122
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2023-05-10 20:13:04 +00:00
Jonathan Amsterdam
2f5f231ac1 log/slog: Group takes ...any
The Group function takes a key and a ...any, which is converted
into attrs.

Fixes #59204.

Change-Id: Ib714365dcda2eda37863ce433f3dd8cf5eeda610
Reviewed-on: https://go-review.googlesource.com/c/go/+/487855
Reviewed-by: Alan Donovan <adonovan@google.com>
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2023-05-04 19:53:09 +00:00
Jonathan Amsterdam
a82f69f60e log/slog: built-in handler constructors take options as a second arg
There is now one constructor function for each built-in handler, with
signature

    NewXXXHandler(io.Writer, *HandlerOptions) *XXXHandler

Fixes #59339.

Change-Id: Ia02183c5ce0dc15c64e33ad05fd69bca09df2d2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/486415
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2023-05-04 18:32:54 +00:00
Ian Lance Taylor
72ba91902a io/fs: add FormatFileInfo and FormatDirEntry functions
For #54451

Change-Id: I3214066f77b1398ac1f2786ea035c83f32f0a826
Reviewed-on: https://go-review.googlesource.com/c/go/+/489555
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2023-05-02 17:59:28 +00:00
Alan Donovan
a1284d0185 go/ast: add IsGenerated(*File) predicate
See https://go.dev/s/generatedcode for spec.

Fixes #28089

Change-Id: Ic9bb138bdd180f136f9e8e74e187319acca5dbac
Reviewed-on: https://go-review.googlesource.com/c/go/+/487935
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2023-04-25 13:57:33 +00:00
Jonathan Amsterdam
c80cedec93 testing/slogtest: tests for slog handlers
Add a package for testing that a slog.Handler implementation
satisfies that interface's documented requirements.

Code copied from x/exp/slog/slogtest.

Updates #56345.

Change-Id: I89e94d93bfbe58e3c524758f7ac3c3fba2a2ea96
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2023-04-24 18:07:26 +00:00
Jonathan Amsterdam
bdccb85f50 log/slog: add Source type for source location
Add a struct called Source that holds the function, file and line
of a location in the program's source code.

When HandleOptions.AddSource is true, the ReplaceAttr function will
get an Attr whose key is SourceKey and whose value is a *Source.

We use *Source instead of Source to save an allocation. The pointer
and the value each cause one allocation up front: the pointer when it
is created, and the value when it is assigned to the `any` field of a
slog.Value (handle.go:283). If a ReplaceAttr function wanted to modify
a Source value, it would have to create a new slog.Value to return,
causing a second allocation, but the function can modify a *Source in
place.

TextHandler displays a Source as "file:line".

JSONHandler displays a Source as a group of its non-zero fields.

This replaces the previous design, where source location was always a
string with the format "file:line". The new design gives users more
control over how to output and consume source locations.

Fixes #59280.

Change-Id: I84475abd5ed83fc354b50e34325c7b246cf327c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/486376
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2023-04-20 17:36:42 +00:00
Damien Neil
54d429999c context: add AfterFunc
Add an AfterFunc function, which registers a function to run after
a context has been canceled.

Add support for contexts that implement an AfterFunc method, which
can be used to avoid the need to start a new goroutine watching
the Done channel when propagating cancellation signals.

Fixes #57928

Change-Id: If0b2cdcc4332961276a1ff57311338e74916259c
Reviewed-on: https://go-review.googlesource.com/c/go/+/482695
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2023-04-19 19:13:01 +00:00
Ian Lance Taylor
48a1dcb927 debug/elf: support zstd compression
Test cases added to debug/dwarf because that is where it matters in practice.

The new test binary line-gcc-zstd.elf built with

    gcc -g -no-pie -Wl,--compress-debug-sections=zstd line[12].c

using

    gcc (Debian 12.2.0-10) 12.2.0

with a development version of the GNU binutils.

Fixes #55107

Change-Id: I48507c96902e1f83a174e5647b5cc403d965b52b
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2023-04-18 20:34:36 +00:00
Matthieu Baerts
fd8acb5d4a net: mptcp: add TCPConn's MultipathTCP checker
This new TCPConn method returns whether the connection is using MPTCP or
if a fallback to TCP has been done, e.g. because the other peer doesn't
support MPTCP.

When working on the new E2E test linked to MPTCP (#56539), it looks like
the user might need to know such info to be able to do some special
actions (report, stop, etc.). This also improves the test to make sure
MPTCP has been used as expected.

Regarding the implementation, from kernel version 5.16, it is possible
to use:

    getsockopt(..., SOL_MPTCP, MPTCP_INFO, ...)

and check if EOPNOTSUPP (IPv4) or ENOPROTOOPT (IPv6) is returned. If it
is, it means a fallback to TCP has been done. See this link for more
details:

    https://github.com/multipath-tcp/mptcp_net-next/issues/294

Before v5.16, there is no other simple way, from the userspace, to check
if the created socket did a fallback to TCP. Netlink requests could be
done to try to find more details about a specific socket but that seems
quite a heavy machinery. Instead, only the protocol is checked on older
kernels.

The E2E test has been modified to check that the MPTCP connection didn't
do any fallback to TCP, explicitely validating the two methods
(SO_PROTOCOL and MPTCP_INFO) if it is supported by the host.

This work has been co-developed by Gregory Detal
<gregory.detal@tessares.net> and Benjamin Hesmans
<benjamin.hesmans@tessares.net>.

Fixes #59166

Change-Id: I5a313207146f71c66c349aa8588a2525179dd8b8
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2023-04-18 13:48:22 +00:00
Jonathan Amsterdam
f3e6f0f296 log/slog: function argument to Record.Attrs returns bool
Record.Attrs stops as soon as its argument function returns false.

Fixes #59060.

Change-Id: I578d64635e0e52b0fcdbc57f6d5a27a6efac8c70
Reviewed-on: https://go-review.googlesource.com/c/go/+/484096
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2023-04-12 20:33:37 +00:00
Jonathan Hall
313ce55a86 regexp: add Regexp.TextMarshaler/TextUnmarshaler
Fixes #46159

Change-Id: I51dc4e9e8915ab5a73f053690fb2395edbeb1151
Reviewed-on: https://go-review.googlesource.com/c/go/+/479401
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2023-04-12 20:03:09 +00:00
Russ Cox
3974029671 go/ast: add File.GoVersion
For #57001, compilers and others tools will need to understand that
a different Go version can be used in different files in a program,
according to the //go:build lines in those files.

This CL adds a GoVersion string field to ast.File, to allow exposing this
per-file Go version information.

For #59033.

Change-Id: I3931ea86c237983d152964f48dce498bcb1f06aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/476276
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2023-04-11 19:40:45 +00:00
Russ Cox
830f54b70e go/build/constraint: add GoVersion
For #57001, programs need to be able to deduce the Go version
implied by a given build constraint. GoVersion determines that,
by discarding all build tags other than Go versions and computing
the minimum Go version implied by the resulting expression.

For #59033.

Change-Id: Ifb1e7af2bdbdf172f82aa490c826c9b6ca5e824b
Reviewed-on: https://go-review.googlesource.com/c/go/+/476275
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2023-04-11 19:39:51 +00:00
Ian Lance Taylor
693a34e788 slices: add DeleteFunc
Fixes #54768

Change-Id: I588ae33c13e0bbd9d324c11771667b22a864047d
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2023-04-07 22:25:51 +00:00
Akihiro Suda
97df9c0b05 net/http: expose "http: server gave HTTP response to HTTPS client" error
Expose "http: server gave HTTP response to HTTPS client" error as `ErrSchemeMismatch`, so that it can be compared with `errors.Is` .

Fixes #44855

Change-Id: If96e0d000fdef641fea407310faf9e1c4f7ad0f0
GitHub-Last-Rev: 22879fc883
GitHub-Pull-Request: golang/go#50939
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2023-04-07 19:44:49 +00:00
Russ Cox
33d8cdeedc reflect: deprecate SliceHeader and StringHeader
These are replaced by unsafe.String etc, which were added in Go 1.20.
Per https://go.dev/wiki/Deprecated, we must wait until Go 1.21
to mark them deprecated.

Fixes #56906.

Change-Id: I4198c3f3456e9e2031f6c7232842e187e6448892
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2023-04-03 17:08:28 +00:00
Austin Clements
bb44c2b54e sync: implement OnceFunc, OnceValue, and OnceValues
This adds the three functions from #56102 to the sync package. These
provide a convenient API for the most common uses of sync.Once.

The performance of these is comparable to direct use of sync.Once:

$ go test -run ^$ -bench OnceFunc\|OnceVal -count 20 | benchstat -row .name -col /v
goos: linux
goarch: amd64
pkg: sync
cpu: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
          │     Once     │                Global                 │                Local                 │
          │    sec/op    │    sec/op     vs base                 │    sec/op     vs base                │
OnceFunc    1.3500n ± 6%   2.7030n ± 1%  +100.22% (p=0.000 n=20)   0.3935n ± 0%  -70.86% (p=0.000 n=20)
OnceValue   1.3155n ± 0%   2.7460n ± 1%  +108.74% (p=0.000 n=20)   0.5478n ± 1%  -58.35% (p=0.000 n=20)

The "Once" column represents the baseline of how code would typically
express these patterns using sync.Once. "Global" binds the closure
returned by OnceFunc/OnceValue to global, which is how I expect these
to be used most of the time. Currently, this defeats some inlining
opportunities, which roughly doubles the cost over sync.Once; however,
it's still *extremely* fast. Finally, "Local" binds the returned
closure to a local variable. This unlocks several levels of inlining
and represents pretty much the best possible case for these APIs, but
is also unlikely to happen in practice. In principle the compiler
could recognize that the global in the "Global" case is initialized in
place and never mutated and do the same optimizations it does in the
"Local" case, but it currently does not.

Fixes #56102

Change-Id: If7355eccd7c8de7288d89a4282ff15ab1469e420
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2023-03-31 20:01:17 +00:00
Matthieu Baerts
7dc10dbf45 net: mptcp: implement listenMPTCP
Similar to dialMPTCP, this listenMPTCP function is called when the user
has requested MPTCP via SetMultipathTCP in the ListenConfig.

This function falls back to listenTCP on operating systems that do not
support MPTCP or if MPTCP is not supported.

On ListenConfig side, MultipathTCP function can be used to know if the
package will try to use MPTCP or not when Listen is called.

Note that this new listenMPTCP function returns a TCPListener object and
not a new MPTCP dedicated one. The reasons are similar as the ones
explained in the parent commit introducing dialTCP: if MPTCP is used by
default later, Listen will return a different object that could break
existing applications expecting TCPListener.

This work has been co-developped by Gregory Detal
<gregory.detal@tessares.net>.

Updates #56539

Change-Id: I010f1d87f921bbac9e157cef2212c51917852353
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2023-03-29 22:12:20 +00:00
Matthieu Baerts
0bd94e4387 net: mptcp: implement dialMPTCP
This function is called when the user has requested MPTCP via
SetMultipathTCP in the Dialer.

This new function falls back to dialTCP on operating systems that do not
support MPTCP or if MPTCP is not supported.

On Dialer side, MultipathTCP function can be used to know if the package
will try to use MPTCP or not when Dial is called.

Note that this new dialMPTCP function returns a TCPConn object, like
dialTCP. A new MPTCPConn object using the following composition could
have been returned:

    type MPTCPConn struct {
        *TCPConn
    }

But the drawback is that if MPTCP is used by default one day (see #56539
issue on GitHub), Dial will return a different object: this new
MPTCPConn type instead of the previously expected TCPConn. This can
cause issues for apps checking the returned object.

This work has been co-developped by Gregory Detal
<gregory.detal@tessares.net>.

Updates #56539

Change-Id: I0f9b5b81f630b39142bdd553d4f1b4c775f1dff0
Reviewed-on: https://go-review.googlesource.com/c/go/+/471136
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Auto-Submit: Ian Lance Taylor <iant@google.com>
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2023-03-29 22:12:18 +00:00
Sameer Ajmani
1844b54166 context: add WithoutCancel
WithoutCancel returns a copy of parent that is not canceled when parent is canceled.
The returned context returns no Deadline or Err, and its Done channel is nil.
Calling Cause on the returned context returns nil.

API changes:
+pkg context, func WithoutCancel(Context) Context

Fixes #40221

Change-Id: Ide29631c08881176a2c2a58409fed9ca6072e65d
Reviewed-on: https://go-review.googlesource.com/c/go/+/479918
Run-TryBot: Sameer Ajmani <sameer@golang.org>
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2023-03-29 20:41:09 +00:00
Jonathan Amsterdam
f67b0a73e3 log/slog: initial commit
The slog structured logging package.

This code was copied from the slog directory of the x/exp repo
at commit 642cacee5cc05231f45555a333d07f1005ffc287, with the
following changes:

- Change import paths.
- Delete unused files list.go, list_test.go.
- Rename example_depth_test.go to example_wrap_test.go and
  adjust example output.
- Change the tag safe_values to safe_slog_values.
- Make captureHandler goroutine-safe to fix a race condition
  in benchmarks.
- Other small changes as suggested in review comments.

Also, add dependencies to go/build/deps_test.go.

Also, add new API for the API checker.

Updates golang/go#56345.

Change-Id: Id8d720967571ced5c5f32c84a8dd9584943cd7df
Reviewed-on: https://go-review.googlesource.com/c/go/+/477295
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2023-03-21 20:55:33 +00:00
Carl Johnson
785ab2fa65 flag: add BoolFunc; FlagSet.BoolFunc
Fixes #53747

Based on CL 416514

Change-Id: I1ff79c6290b06dfa8672a473045e8fe80c22afcf
GitHub-Last-Rev: 74fba9b309
GitHub-Pull-Request: golang/go#59013
Reviewed-on: https://go-review.googlesource.com/c/go/+/476015
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2023-03-16 16:44:21 +00:00
Filippo Valsorda
f03fb147d7 crypto/elliptic: deprecate unsafe APIs
Per the updated go.dev/wiki/Deprecated, those APIs replaced by
crypto/ecdh (added in Go 1.20) can now be marked as deprecated
in Go 1.21.

Updates #52221
Updates #34648

Change-Id: Id0e11d7faa3a58a1716ce1ec6e2fff97bab96259
Reviewed-on: https://go-review.googlesource.com/c/go/+/459977
Run-TryBot: Filippo Valsorda <filippo@golang.org>
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2023-03-16 16:31:26 +00:00
Filippo Valsorda
5ddbe05c07 crypto/rsa: deprecate multiprime RSA support
Fixes #56921

Change-Id: I03f9969a5146ab7becd983784d8cb5b23a3fbb18
Reviewed-on: https://go-review.googlesource.com/c/go/+/459976
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2023-03-16 16:31:24 +00:00
Ian Lance Taylor
7f38067acb testing: add Testing function
The Testing function reports whether the program is a test created
by "go test".

Fixes #52600

Change-Id: Ie0fff7c7dfdfdf997c18b4b6112632600b327cc8
Reviewed-on: https://go-review.googlesource.com/c/go/+/475496
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2023-03-13 21:58:46 +00:00
Aaron Gable
82c713feb0 crypto/x509: surface ReasonCode in RevocationList API
Creates x509.RevocationListEntry, a new type representing a single
revoked certificate entry in a CRL. Like the existing Certificate and
RevocationList types, this new type has a field for its Raw bytes, and
exposes its mostly-commonly-used extension (ReasonCode) as a top-level
field. This provides more functionality to the user than the existing
pkix.RevokedCertificate type.

Adds a RevokedCertificateEntries field which is a []RevocationListEntry
to RevocationList. This field deprecates the RevokedCertificates field.
When the RevokedCertificates field is removed in a future release, this
will remove one of the last places where a pkix type is directly exposed
in the x509 package API.

Updates the ParseRevocationList function to populate both fields for
now, and updates the CreateRevocationList function to prefer the new
field if it is populated, but use the deprecated field if not. Finally,
also updates the x509 unit tests to use the new .ReasonCode field in
most cases.

Fixes #53573

Change-Id: Ia6de171802a5bd251938366508532e806772d7d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/468875
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2023-03-13 20:25:37 +00:00
Joe Tsai
e671fe0c3e bytes: add Buffer.Available and Buffer.AvailableBuffer
This adds a new Buffer.AvailableBuffer method that returns
an empty buffer with a possibly non-empty capacity for use
with append-like APIs.

The typical usage pattern is something like:

	b := bb.AvailableBuffer()
	b = appendValue(b, v)
	bb.Write(b)

It allows logic combining append-like APIs with Buffer
to avoid needing to allocate and manage buffers themselves and
allows the append-like APIs to directly write into the Buffer.

The Buffer.Write method uses the builtin copy function,
which avoids copying bytes if the source and destination are identical.
Thus, Buffer.Write is a constant-time call for this pattern.

Performance:

	BenchmarkBufferAppendNoCopy  2.909 ns/op  5766942167.24 MB/s

This benchmark should only be testing the cost of bookkeeping
and never the copying of the input slice.
Thus, the MB/s should be orders of magnitude faster than RAM.

Fixes #53685

Change-Id: I0b41e54361339df309db8d03527689b123f99085
Reviewed-on: https://go-review.googlesource.com/c/go/+/474635
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2023-03-13 17:03:14 +00:00
Andy Pan
70f98a251e errors: add ErrUnsupported
Fixes #41198

Change-Id: Ib33a11d0eb311f8e2b81de24d11df49e00b2fc81
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2023-03-11 05:07:02 +00:00
Damien Neil
457fd1d52d net/http: support full-duplex HTTP/1 responses
Add support for concurrently reading from an HTTP/1 request body
while writing the response.

Normally, the HTTP/1 server automatically consumes any remaining
request body before starting to write a response, to avoid deadlocking
clients which attempt to write a complete request before reading the
response.

Add a ResponseController.EnableFullDuplex method which disables this
behavior.

For #15527
For #57786

Change-Id: Ie7ee8267d8333e9b32b82b9b84d4ad28ab8edf01
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2023-03-07 22:52:18 +00:00