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Commit Graph

55810 Commits

Author SHA1 Message Date
Tobias Klauser
2d84fbbad8 net: correct TestIPConnSpecificMethods comment after CL 476217
As suggested by Cherry in
https://go-review.googlesource.com/c/go/+/476217/5/src/net/protoconn_test.go#171

Change-Id: I4ce3c034b44953720c543a87639fd173f86af7dc
Reviewed-on: https://go-review.googlesource.com/c/go/+/476535
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-03-15 19:02:47 +00:00
Michael Pratt
07a25a9f6e runtime: pass M to traceReleaseBuffer
This change is a no-op, but makes the acquire-release pair
traceAcquireBuffer / traceReleaseBuffer more explicit, since the former
does acquirem and the latter releasm.

Change-Id: If8a5b1ba8709bf6f39c8ff27b2d3e0c0b0da0e58
Reviewed-on: https://go-review.googlesource.com/c/go/+/476575
Auto-Submit: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
2023-03-15 18:32:37 +00:00
Bryan C. Mills
2a30b34e29 net/http: avoid making a request to a closed server in TestServerShutdown
As soon as the test server closes its listener, its port may be reused
for another test server. On some platforms port reuse takes a long
time, because they cycle through the available ports before reusing an
old one. However, other platforms reuse ports much more aggressively.
net/http shouldn't know or care which kind of platform it is on —
dialing wild connections is risky and can interfere with other tests
no matter what platform we do it on.

Instead of making the second request after the server has completely
shut down, we can start (and finish!) the entire request while we are
certain that the listener has been closed but the port is still open
serving an existing request. If everything synchronizes as we expect,
that should guarantee that the second request fails.

Fixes #56421.

Change-Id: I56add243bb9f76ee04ead8f643118f9448fd1280
Reviewed-on: https://go-review.googlesource.com/c/go/+/476036
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2023-03-15 17:40:40 +00:00
Than McIntosh
f26bf203ac cmd/link/internal/arm: fix off-by-1 in trampoline reachability computation
Tweak the code in trampoline generation that determines if a given
call branch will reach, changing the lower limit guard from "x <
-0x800000" to "x <= -0x800000". This is to resolve linking failures
when the computed displacement is exactly -0x800000, which results in
errors of the form

  .../ld.gold: internal error in arm_branch_common, at ../../gold/arm.cc:4079

when using the Gold linker, and

  ...:(.text+0x...): relocation truncated to fit: R_ARM_CALL against `runtime.morestack_noctxt'

when using the bfd linker.

Fixes #59034.
Updates #58425.

Change-Id: I8a76986b38727df1b961654824c2af23f06b9fcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/475957
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 17:32:28 +00:00
Ian Lance Taylor
f5eef58e43 syscall: restore original NOFILE rlimit in child process
If we increased the NOFILE rlimit when starting the program,
restore the original rlimit when forking a child process.

For #46279

Change-Id: Ia5d2af9ef435e5932965c15eec2e428d2130d230
Reviewed-on: https://go-review.googlesource.com/c/go/+/476097
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Ian Lance Taylor <iant@google.com>
2023-03-15 17:21:30 +00:00
Ian Lance Taylor
491153a71a os, syscall: move rlimit code to syscall
In CL 393354 the os package was changed to raise the open file rlimit
at program start. That code is not inherently tied to the os package.
This CL moves it into the syscall package.

This is in preparation for future changes to restore the original
soft rlimit when exec'ing a new program.

For #46279

Change-Id: I981401b0345d017fd39fdd3dfbb58069be36c272
Reviewed-on: https://go-review.googlesource.com/c/go/+/476096
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-03-15 17:18:32 +00:00
Tobias Klauser
1d06667bc4 net: skip tests if creating a socket is disallowed
In a container environment, creating a socket may be disallowed. Try to
detect these cases and skip the tests instead of failing them.

Fixes #58114

Change-Id: I681d19107e946d2508e2d1704956360f13c7335b
Reviewed-on: https://go-review.googlesource.com/c/go/+/476217
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-03-15 17:06:26 +00:00
Ian Lance Taylor
fbe3136646 net: remove max timeout from TestDialTimeout
Just rely on the testsuite timeout. If this hangs we will hopefully
get some real information.

Fixes #57475

Change-Id: I18dc5cae54ad5d2d8cc472056b8a3b4d5455c8b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/476356
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-03-15 16:19:26 +00:00
Joe Tsai
2e51f6f25c encoding/json: make use of Buffer.AvailableBuffer
Use the explicit API for acquiring an empty available buffer,
rather than the hack that's implemented in terms of Bytes and Len.

Change-Id: If286ed42693acd61ffe28dc849ed4b76c3ae4434
Reviewed-on: https://go-review.googlesource.com/c/go/+/476337
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-03-15 15:41:55 +00:00
Tobias Klauser
e64e000f55 internal/testenv, syscall: move isNotSupported to internal/testenv
This allows to use this helper function in packages other than syscall,
namely package net.

For #58114

Change-Id: I72c59ab013e9195801ff1315019ae1aef4396287
Reviewed-on: https://go-review.googlesource.com/c/go/+/476216
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-03-15 15:38:24 +00:00
Tobias Klauser
778f271057 syscall: handle errors.ErrUnsupported in isNotSupported
Updates #41198

Change-Id: Ifed913f6088b77abc7a21d2a79168a20799f9d0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/475857
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
2023-03-15 14:29:43 +00:00
Bryan C. Mills
bbf795ebb1 internal/platform: add a function to report whether default builds are PIE
This consolidates a condition that was previously repeated (in
different approximations) in several different places in the code.

For #58807.

Change-Id: Idd308759f6262b1f5c61f79022965612319edf94
Reviewed-on: https://go-review.googlesource.com/c/go/+/475457
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 13:31:05 +00:00
Paul E. Murphy
a8cd10f2ab runtime: add arg storage to ppc64le/linux runtime.sigprofNonGoWrapper frame
CL 475935 fixed the the ELFv2 ABI violations, but in the process created a
Go ABI violation by failing to allocate stack space for arguments.

Allocate this space while keeping the frame 16 byte aligned.

Updates #58953

Change-Id: I9942d9a433118b391ef8cd7bcea5808695cf94d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/476296
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Archana Ravindar <aravind5@in.ibm.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 13:30:09 +00:00
WANG Xuerui
71f82df19a cmd/link/internal/loong64: use BREAK 0 as the code pad sequence
As the comment on CodePad goes, we "might want to pad with a trap
instruction to catch wayward programs". The current behavior of
zero-padding is equivalent to padding with an instruction of 0x00000000,
which is invalid according to the LoongArch manuals nevertheless, but
rumor has it that some early and/or engineering samples of Loongson
3A5000 recognized it (maybe behaving like NOP). It is better to avoid
undocumented behavior and ensure execution flow would not overflow the
pads.

Change-Id: I531b1eabeb355e9ad4a2d5340e61f2fe71349297
Reviewed-on: https://go-review.googlesource.com/c/go/+/475616
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 07:19:39 +00:00
WANG Xuerui
7789966286 cmd/compile/internal, runtime: use NOOP for hardware NOPs on loong64
The canonical LoongArch NOP instruction form is "andi r0, r0, 0", as
described in the LoongArch Reference Manual Volume 1, Section 2.2.1.10.
We currently use NOR instead, which may or may not change anything (e.g.
performance on less capable micro-architectures) but is deviation from
upstream standards nevertheless. Fix them to use the explicit hardware
NOP which happens to be supported as `NOOP`.

Change-Id: I0a799a1da959e9c3b582feb88202df2bab0ab23a
Reviewed-on: https://go-review.googlesource.com/c/go/+/475615
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 07:18:43 +00:00
Guoqi Chen
b5c8ae9816 runtime: mark morestack_noctxt SPWRITE for linux/loong64
ref. CL 425396

Updates #54332.

Change-Id: I1a235b0cca4dbf79cf61cf5f40b594fc2d940857
Reviewed-on: https://go-review.googlesource.com/c/go/+/446895
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
2023-03-15 07:17:43 +00:00
Guoqi Chen
574c620901 runtime: refactor the linux/loong64 entrypoint
Remove the meaningless jump, and add the missing NOFRAME flag to _rt0_loong64_linux.

Change-Id: I1aec68c556615b42042684bd176dfc2a8af094d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/420977
Run-TryBot: M Zhuo <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
2023-03-15 07:15:46 +00:00
Ian Lance Taylor
9ae97f8b8b os: don't hide all methods in recursive call to io.Copy
In order to avoid a recursive call to ReadFrom, we were converting
a *File to an io.Writer. But all we really need to do is hide
the ReadFrom method. In particular, this gives us the option of
adding a WriteTo method.

For #58808

Change-Id: I20d3a45749d528c93c23267c467e607fc17dc83f
Reviewed-on: https://go-review.googlesource.com/c/go/+/475535
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-15 00:12:37 +00:00
Tobias Klauser
ebf8e26d03 cmd/go/internal/modfetch: use errors.ErrUnsupported
CL 473935 added errors.ErrUnsupported, let's use it.

Updates #41198

Change-Id: If6534d19cb31ca979ff00d529bd6bdfc964a616d
Reviewed-on: https://go-review.googlesource.com/c/go/+/476135
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Bryan Mills <bcmills@google.com>
2023-03-14 21:49:36 +00:00
Brad Fitzpatrick
08c3299829 database/sql: remove a distracting alloc, use atomic.Bool
This removes an allocation in Conn.grabConn that, while not super
important, was distracting me when optimizing code elsewhere.

While here, convert an atomic that was forgotten when this package was
earlier updated to use the new Go 1.19 typed atomics.

Change-Id: I4666256b4c0512e2162bd485c389130699f9d5ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/475415
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2023-03-14 20:34:27 +00:00
Paul E. Murphy
46bc9a6e1e runtime,runtime/cgo: fix tsan/pprof/cgo issues
The tsan13 test highlighted a few bugs.

The first being runtime.sigprofNonGoWrapper was being
called from C code and violating the C ABI.

The second was a missed tsan acquire/release after
thread creation.

The third was runtime.cgoSigtramp violating ELFv2
ABI constraints when loading g. It is reworked to
avoid clobbering R30 and R31 via runtime.load_g.

Change-Id: Ib2d98047fa1b4e72b8045767e86457a8ddfe492e
Reviewed-on: https://go-review.googlesource.com/c/go/+/475935
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Archana Ravindar <aravind5@in.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-03-14 16:42:25 +00:00
Than McIntosh
035db07d7c cmd/go,cmd/link: prefer external linking when strange cgo flags seen
This patch changes the Go command to examine the set of compiler
flags feeding into the C compiler when packages that use cgo are built.
If any of a specific set of strange/dangerous flags are in use,
then the Go command generates a token file ("preferlinkext") and
embeds it into the compiled package's archive.

When the Go linker reads the archives of the packages feeding into the
link and detects a "preferlinkext" token, it will then use external
linking for the program by default (although this default can be
overridden with an explicit "-linkmode" flag).

The intent here is to avoid having to teach the Go linker's host object
reader to grok/understand the various odd symbols/sections/types that
can result from boutique flag use, but rather to just boot the objects
in question over to the C linker instead.

Updates #58619.
Updates #58620.
Updates #58848.

Change-Id: I56382dd305de8dac3841a7a7e664277826061eaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/475375
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-03-14 13:17:46 +00:00
qmuntal
b37c0602cd cmd/link: store COFF symbol complex type in the LSB instead of the MSB
Microsoft's PE documentation is contradictory. It says that the
symbol's complex type [1] is stored in the pesym.Type most significant
byte (MSB), but MSVC, LLVM, and mingw store it in the 4 high bits of
the less significant byte (LSB). dumpbin understands both encoding.

Previous to CL 475355 the Go compiler mixed MSB and LSB encoding.
CL 475355 updated to compiler to use the MSB, but this causes problems
with mingw, which emits a warning when MSB is used.

For reference, LLVM also hit this issue long time ago:
https://github.com/llvm/llvm-project/issues/8692

[1] https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#type-representation

Change-Id: I7e750bde9c20e2c4c1c023203d7abd6fb26d9d30
Reviewed-on: https://go-review.googlesource.com/c/go/+/475855
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-03-14 10:02:09 +00:00
David Chase
a54fe8a270 cmd/go: restore 'extend path shortening to all paths in messages'
The problem requiring a revert was creation (somehow) of /-containing
paths in compiler messages on Windows.  The new code deals with this
existing-but-unexpected behavior.

original was CL 465805
revert was CL 473795

this is the original, plus a correction for unexpected paths on Windows.

Change-Id: I786e875e704c2d7018c8248960f2ff7188cac3ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/474015
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: David Chase <drchase@google.com>
2023-03-14 09:07:58 +00:00
Wayne Zuo
dd009b2f1a runtime/internal/sys: remove 386 assembly code
Change-Id: Ia4f8638d626c30b91729caa0c58a96451c627f67
Reviewed-on: https://go-review.googlesource.com/c/go/+/475736
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-03-14 08:10:45 +00:00
Wayne Zuo
cedfcba3e8 cmd/compile: instrinsify TrailingZeros{8,32,64} for 386
This CL add support for instrinsifying the TrialingZeros{8,32,64}
functions for 386 architecture. We need handle the case when the input
is 0, which could lead to undefined output from the BSFL instruction.

Next CL will remove the assembly code in runtime/internal/sys package.

Change-Id: Ic168edf68e81bf69a536102100fdd3f56f0f4a1b
Reviewed-on: https://go-review.googlesource.com/c/go/+/475735
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-03-14 08:10:32 +00:00
Ludi Rehak
82bf12902f regexp/syntax: test for lowercase letters first in IsWordChar
Lowercase letters occur more frequently than uppercase letters
in English text.  In IsWordChar, evaluate the most common case
(lowercase letters) first to minimize the expected value of its
execution time. Code clarity does not suffer by rearranging the
order of the checks.

Add a benchmark on a sentence demonstrating the performance
improvement.

name           old time/op  new time/op  delta
IsWordChar-10   122ns ± 0%   114ns ± 1%  -6.68%  (p=0.000 n=8+10)

Change-Id: Ieee8126a4bd8ee8703905b4f75724623029f6fa2
Reviewed-on: https://go-review.googlesource.com/c/go/+/404100
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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2023-03-14 04:39:42 +00:00
Tianon Gravi
7ec69abf05 runtime/debug: replace "GOARM64" with "GOARM" in docs
The former does not exist (yet) but the latter very much exists and is in active use.

Change-Id: Ic8812b98a10f01061a211a0de4caa9e9cfff36fa
GitHub-Last-Rev: 0dab9f524c
GitHub-Pull-Request: golang/go#59014
Reviewed-on: https://go-review.googlesource.com/c/go/+/476016
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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2023-03-14 04:30:59 +00:00
Russ Cox
8b3dc5399d cmd/dist: add needCC comment, fix needCC
This was missed in CL 475377.

Change-Id: I4e8c4c0459a92029a3f448c1e4172d3343280c57
Reviewed-on: https://go-review.googlesource.com/c/go/+/475958
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-03-14 03:09:31 +00:00
Cherry Mui
40a6e2dae5 cmd/compile: tighten for huge functions in -N mode
Currently, in -N mode we skip the tighten pass. However, for very
large functions, many values live across blocks can cause
pathological behavior in the register allocator, which could use
a huge amount of memory or cause the program to hang. For
functions that large, debugging using a debugger is unlikely to be
very useful (the function is probably generated anyway). So we do
a little optimization to make fewer values live across blocks and
make it easier for the compiler.

Fixes #52180.

Change-Id: I355fe31bb87ea5d0870bb52dd06405dd5d791dab
Reviewed-on: https://go-review.googlesource.com/c/go/+/475339
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Keith Randall <khr@golang.org>
2023-03-13 22:04:56 +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
Bryan C. Mills
e8543a6fa6 net/http: remove more arbitrary timeouts from server tests
This change eliminates the easy, arbitrary timouts that should
never happen. It leaves in place a couple of more complicated ones
that will probably need retry loops for robustness.

For #49336.
For #36179.

Change-Id: I657ef223a66461413a915da5ce9150f49acec04a
Reviewed-on: https://go-review.googlesource.com/c/go/+/476035
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2023-03-13 21:21:28 +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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Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
2023-03-13 20:25:37 +00:00
Tobias Klauser
7c019c62fb syscall: use clone3 syscall with CLONE_NEWTIME
CLONE_NEWTIME can only be used with the clone3 and unshare system calls,
see 769071ac9f:

> All available clone flags have been used, so CLONE_NEWTIME uses the highest
> bit of CSIGNAL. It means that it can be used only with the unshare() and
> the clone3() system calls.

The clone3 syscall was added in Linux kernel version 5.3 and
CLONE_NEWTIME was added in version 5.6. However, it was non-functional
until version 6.3 (and stable versions with the corresponding fix [1]).

[1] https://lore.kernel.org/lkml/20230308105126.10107-1-tklauser@distanz.ch/

In case CLONE_NEWTIME is set in SysProcAttr.Cloneflags on an unsupported
kernel version, the fork/exec call will fail.

Fixes #49779

Change-Id: Ic3ecfc2b601bafaab12b1805d7f9512955a8c7e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/474356
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2023-03-13 19:26:17 +00:00
Filippo Valsorda
778627f331 crypto/internal/nistec: refactor scalar multiplication
The assumptions of some of the assembly functions were still scarcely
documented and even disregarded: p256ScalarMult was relying on the fact
that the "undefined behavior" of p256PointAddAsm with regards to
infinity inputs was returning the infinity.

Aside from expanding comments, moving the bit window massaging into a
more easily understood p256OrdRsh function, and fixing the above, this
change folds the last iteration of p256ScalarMult into the loop to
reduce special cases and inverts the iteration order of p256BaseMult so
it matches p256ScalarMult for ease of comparison.

Updates #58647

Change-Id: Ie5712ea778aadbe5adcdb478d111c2527e83caa0
Reviewed-on: https://go-review.googlesource.com/c/go/+/471256
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2023-03-13 18:55:22 +00:00
Geon Kim
90dde5dec1 time: fix timezone lookup logic for non-DST zones
This change fixes time.LoadLocationFromTZData and time.Location.lookup logic if the given time is after the last transition and the extend string doesn't have the DST rule.

Fixes #58682

Change-Id: Ie34a6d658d14c2b33098b29ab83c041ef0d34266
GitHub-Last-Rev: f6681eb44c
GitHub-Pull-Request: golang/go#58684
Reviewed-on: https://go-review.googlesource.com/c/go/+/471020
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2023-03-13 17:06:56 +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
cui fliter
bcd8161f4e cmd/go: unify the format of the go help xxx command
Fixes #58871
Updates #58871

Change-Id: I947b71083e9559859b3ae6e17b5daad03a976707
Reviewed-on: https://go-review.googlesource.com/c/go/+/474375
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2023-03-13 16:58:15 +00:00
cui fliter
50ba90bce5 all: fix some problematic comments
Change-Id: Ia110d19fe5ff3adc8bbf86dd2112f9702164d495
Reviewed-on: https://go-review.googlesource.com/c/go/+/475515
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2023-03-13 16:49:45 +00:00
Russ Cox
c67a27bf75 cmd/dist: omit DWARF in build release toolchain binaries
The vast majority of users of Go toolchains have no need for
binaries like the go command and compiler to include DWARF
information, and the DWARF information is 34% of the size of
the overall Go toolchain zip files (14% when the toolchain is
unzipped on disk, because other parts get bigger).

To save network and disk, disable DWARF in build release binaries.
DWARF remains enabled when developing in the main branch
(signaled by no VERSION file existing), for better debuggability
when actually working on the compiler and go command.

Note that removing DWARF does not break the backtraces shown
when a binary panics, nor does it break other uses of stack traces
from within a Go program, such as runtime.Callers.

To build a release toolchain with DWARF included, people can use

	GO_LDFLAGS=-w=0 ./make.bash

Change-Id: Ib0bbe1446adca4599066b2fb2f2734e6825c1106
Reviewed-on: https://go-review.googlesource.com/c/go/+/475378
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2023-03-13 16:49:42 +00:00
Russ Cox
91c82ff7c9 cmd/dist: reproducibility fixes
Fix a few lingering reproducibility problems.

- Do not set CC during go install std if it is unset,
  so that the automatic disabling of cgo in cmd/go can run.

- Since CC is not necessary, remove code insisting on it.

- Use a fixed quoting algorithm instead of %q from the
  bootstrap toolchain, which can differ from release to release.

- Remove go_bootstrap tool successfully on Windows.

For #24904.

Change-Id: I5c29ba6a8592e93bfab37f123b69f55c02f12ce3
Reviewed-on: https://go-review.googlesource.com/c/go/+/475377
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2023-03-13 16:47:12 +00:00
qmuntal
43f911b0b6 runtime: remove NOFRAME from asmcgocall, systemstack and mcall
This CL removes the NOFRAME flag from runtime.asmcgocall,
runtime.systemstack and runtime.mcall so the compiler can place
the frame pointer on the stack.

This will help unwinding cgo stack frames, and might be all what's
needed for tools that only use the frame pointer to unwind the stack.
That's not the case for gdb, which uses DWARF CFI, and windbg,
which uses SEH. Yet, having the frame pointer correctly set lays
the foundation for supporting cgo unwinding with DWARF CFI and SEH.

Updates #58378

Change-Id: I7655363b3fb619acccd9d5a7f0e3d3dec953cd52
Reviewed-on: https://go-review.googlesource.com/c/go/+/472195
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2023-03-13 15:28:25 +00:00
qmuntal
b6f29d2365 runtime: implement high resolution timer on windows arm/arm64
This CL moves the usleep2HighRes from assembly to good old Go.
This is safe because since CL 288793 usleep is always called with
a g, else one wold have to call usleep_no_g. This condition was
not enforced when high resolution timers were first implemented
on Windows (CL 248699), so the implementation was done in assembly.

Other than removing a bunch of obscure assembly code, this CL makes
high resolution timers work on windows arm/arm64 by free, as the
system calls are the same in all windows platforms.

Change-Id: I41ecf78026fd7e11e85258a411ae074a77e8c7fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/471142
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2023-03-13 14:20:41 +00:00
Guoqi Chen
b561ebab46 cmd/internal/obj/loong64: remove invalid branch delay slots
Change-Id: I222717771019f7aefa547971b2d94ef4677a42c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/420979
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
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2023-03-13 14:16:39 +00:00
Tobias Klauser
93b8995594 os: correct func name in WriteFile godoc comment
Change-Id: Ideb70ce04f49ff676c20c2e1f0b43f1d7a6665dc
Reviewed-on: https://go-review.googlesource.com/c/go/+/474355
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2023-03-13 13:35:04 +00:00
Andy Pan
70f98a251e errors: add ErrUnsupported
Fixes #41198

Change-Id: Ib33a11d0eb311f8e2b81de24d11df49e00b2fc81
Reviewed-on: https://go-review.googlesource.com/c/go/+/473935
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2023-03-11 05:07:02 +00:00
qmuntal
d9c29ec6a5 cmd/link: define correct complex types values for COFF symbols
This CL updates IMAGE_SYM_DTYPE_FUNCTION and IMAGE_SYM_DTYPE_ARRAY
definition and usage so their value can be set to what's defined in
the Microsoft PE docs [1], fixing a long-standing TODO.

[1] https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#type-representation

Change-Id: I93c19eb78e8a770e8c72245fe9495647e2c5ae5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/475355
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2023-03-10 22:47:16 +00:00
Bryan C. Mills
53c91f9205 os: skip TestExecutableDeleted earlier when 'go build' is not supported
The test unconditionally calls testenv.GoToolPath, which will skip the
test anyway. Moving the skip earlier gets this test out of goroutine
dumps if the test process fails or times out, making it easier to
diagnose failures in the remaining tests.

Change-Id: Ibd39546708a83b6f15616b2c4ae7af420e2401f0
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2023-03-10 21:27:06 +00:00
Bryan C. Mills
d12fe60004 all: skip tests that fail on android/arm64
Many of the tests skipped platforms that build PIE binaries by
default, but (still) lack a central function to report which platforms
those are.

Some of the tests assumed (but did not check for) internal linking
support, or invoked `go tool link` directly without properly
configuring the external linker.

A few of the tests seem to be triggering latent bugs in the linker.

For #58806.
For #58807.
For #58794.

Change-Id: Ie4d06b1597f404590ad2abf978d4c363647407ac
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2023-03-10 20:38:29 +00:00
Robert Griesemer
2cbab4e98c cmd/compile: pass type checker error codes in the compiler
Pass type checker error codes to base.ErrorfAt function calls
in the compiler (but don't do anything yet with the code).

Also, provide error codes to base.ErrorfAt calls in the
compiler as needed.

This opens the door towards reporting the error code and/or
providing a link/reference to more detailed explanations
(see internal/types/errors/codes.go).

Change-Id: I0ff9368d8163499ffdac6adfe8331fdc4a19b4b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/475198
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2023-03-10 18:22:02 +00:00