Damien Neil [Thu, 10 Nov 2022 20:16:27 +0000 (12:16 -0800)]
[release-branch.go1.19] os, net/http: avoid escapes from os.DirFS and http.Dir on Windows
Do not permit access to Windows reserved device names (NUL, COM1, etc.)
via os.DirFS and http.Dir filesystems.
Avoid escapes from os.DirFS(`\`) on Windows. DirFS would join the
the root to the relative path with a path separator, making
os.DirFS(`\`).Open(`/foo/bar`) open the path `\\foo\bar`, which is
a UNC name. Not only does this not open the intended file, but permits
reference to any file on the system rather than only files on the
current drive.
Make os.DirFS("") invalid, with all file access failing. Previously,
a root of "" was interpreted as "/", which is surprising and probably
unintentional.
Than McIntosh [Mon, 21 Nov 2022 16:01:53 +0000 (11:01 -0500)]
[release-branch.go1.19] testing: skip flaky TestRaiseException on windows-amd64-2012-*
Modify skip rule for TestRaiseException to trigger on both the base
builder (windows-amd64-2012) and the oldcc legacy builder
(windows-amd64-2012-oldcc) used for 1.18/1.19 testing.
Updates #56983.
Change-Id: I132f9ddd102666b68ad04cc661fdcc2cd841051a
Reviewed-on: https://go-review.googlesource.com/c/go/+/451294
Auto-Submit: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Bryan Mills <bcmills@google.com>
(cherry picked from commit f0331c524e0d8d32c3918d3515ab8413f38dbd56)
Reviewed-on: https://go-review.googlesource.com/c/go/+/454035 Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Bypass: Than McIntosh <thanm@google.com>
Cherry Mui [Wed, 9 Nov 2022 15:55:54 +0000 (10:55 -0500)]
[release-branch.go1.19] runtime: make GC see object as allocated after it is initialized
When the GC is scanning some memory (possibly conservatively),
finding a pointer, while concurrently another goroutine is
allocating an object at the same address as the found pointer, the
GC may see the pointer before the object and/or the heap bits are
initialized. This may cause the GC to see bad pointers and
possibly crash.
To prevent this, we make it that the scanner can only see the
object as allocated after the object and the heap bits are
initialized. Currently the allocator uses freeindex to find the
next available slot, and that code is coupled with updating the
free index to a new slot past it. The scanner also uses the
freeindex to determine if an object is allocated. This is somewhat
racy. This CL makes the scanner use a different field, which is
only updated after the object initialization (and a memory
barrier).
Updates #54596.
Fixes #56752.
Change-Id: I2a57a226369926e7192c253dd0d21d3faf22297c
Reviewed-on: https://go-review.googlesource.com/c/go/+/449017 Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit febe7b8e2a4dd7cce6ab8d02cf79a5430819cbe5)
Reviewed-on: https://go-review.googlesource.com/c/go/+/453235
Cherry Mui [Fri, 30 Sep 2022 23:01:09 +0000 (19:01 -0400)]
[release-branch.go1.19] runtime: don't jump stack if at entry of systemstack
The traceback code has special "jump stack" logic, to trace back
stack switches through systemstack. If we're at the entry of
systemstack, the stack switch hasn't happened, so don't jump to
user stack.
The jump stack logic is only used if we're on the g0 stack. It can
happen that we're at the entry of a recursive systemstack call on
the g0 stack. In we jump stack here, there will be two problems:
1. There are frames between entering the g0 stack and this
recursive systemstack call. Those frames will be lost.
2. Worse, we switched frame.sp but frame.fp calculation will use
the entry SP delta (0), which will be wrong, which in turn
leads wrong frame.lr and things will go off.
For now, don't jump stack if we're at entry of systemstack (SP
delta is 0).
Using a per-PC SPWRITE marker may be a better fix. If we haven't
written the SP, we haven't switched the stack so we can just
unwind like a normal function.
Updates #55851.
Fixes #56636.
Change-Id: I2b624c8c086b235b34d9c7d3cebd4a37264f00f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/437299
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
(cherry picked from commit 500bc6b8056ee2eaf7640610a48ffa00bdd896a5)
Reviewed-on: https://go-review.googlesource.com/c/go/+/448516
Matthew Dempsky [Thu, 3 Nov 2022 18:56:43 +0000 (11:56 -0700)]
[release-branch.go1.19] cmd/compile: allow ineffectual //go:linkname in -lang=go1.17 and older
Prior to Go 1.18, ineffectual //go:linkname directives (i.e.,
directives referring to an undeclared name, or to a declared type or
constant) were treated as noops. In Go 1.18, we changed this into a
compiler error to mitigate accidental misuse.
However, the x/sys repo contained ineffectual //go:linkname directives
up until go.dev/cl/274573, which has caused a lot of user confusion.
It seems a bit late to worry about now, but to at least prevent
further user pain, this CL changes the error message to only apply to
modules using "go 1.18" or newer. (The x/sys repo declared "go 1.12"
at the time go.dev/cl/274573 was submitted.)
Matthew Dempsky [Thu, 3 Nov 2022 18:02:51 +0000 (11:02 -0700)]
[release-branch.go1.19] os/exec: allow NUL in environment variables on Plan 9
Plan 9 uses NUL as os.PathListSeparator, so it's almost always going
to appear in the environment variable list. Exempt GOOS=plan9 from the
check for NUL in environment variables.
For #56284.
For #56544.
Fixes #56551.
Change-Id: I23df233cdf20c0a9a606fd9253e15a9b5482575a
Reviewed-on: https://go-review.googlesource.com/c/go/+/447715 Reviewed-by: David du Colombier <0intro@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/447799
Run-TryBot: David du Colombier <0intro@gmail.com>
Cherry Mui [Fri, 14 Oct 2022 23:52:00 +0000 (19:52 -0400)]
[release-branch.go1.19] cmd/compile: copy blank parameter node when substituting function type
When a function type is copied (e.g. for substituting type
parameters), we make copies of its parameter ir.Name nodes, so
they are not shared with the old function type. But currently a
blank (_) identifier is not copied but shared. The parameter
node's frame offset is assigned (in ABI analysis) and then used in
the concurrent backend. Shared node can cause a data race. Make a
new blank parameter node to avoid sharing. (Unified IR does already
not have this problem. This fixes non-unified-IR mode.)
Updates #55357.
Fixes #56360.
Change-Id: Ie27f08e5589ac7d5d3f0d0d5de1a21e4fd2765c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/443158 Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
(cherry picked from commit 4725c71b735143a138b24f2b0e055c717d8d69ca)
Reviewed-on: https://go-review.googlesource.com/c/go/+/445176
Paul E. Murphy [Thu, 20 Oct 2022 22:01:01 +0000 (17:01 -0500)]
[release-branch.go1.19] runtime: fix usleep on linux/PPC64
The existing implementation fails to convert the remainder
microseconds to nanoseconds. This causes sysmon to consume
much more cpu, and generate lots of context switches.
We can also do a little better here to avoid division by a
constant. I used go to determine the magic numbers.
Check for and reject environment variables containing NULs.
The conventions for passing environment variables to subprocesses
cause most or all systems to interpret a NUL as a separator. The
syscall package rejects environment variables containing a NUL
on most systems, but erroneously did not do so on Windows. This
causes an environment variable such as "FOO=a\x00BAR=b" to be
interpreted as "FOO=a", "BAR=b".
Check for and reject NULs in environment variables passed to
syscall.StartProcess on Windows.
Add a redundant check to os/exec as extra insurance.
Cuong Manh Le [Sat, 8 Oct 2022 05:32:06 +0000 (12:32 +0700)]
[release-branch.go1.19] cmd/compile: fix missing walk pass for static initialization slice
CL 403995 fixed static init of literal contains dynamic exprs, by
ensuring their init are ordered properly. However, we still need to walk
the generated init codes before appending to parent init. Otherwise,
codes that requires desugaring will be unhandled, causing the compiler
backend crashing.
Fixes #56106
Change-Id: Ic25fd4017473f5412c8e960a91467797a234edfd
Reviewed-on: https://go-review.googlesource.com/c/go/+/440455 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-on: https://go-review.googlesource.com/c/go/+/441995 Reviewed-by: Joedian Reid <joedian@golang.org> Reviewed-by: David Chase <drchase@google.com>
Cuong Manh Le [Tue, 11 Oct 2022 04:56:51 +0000 (11:56 +0700)]
[release-branch.go1.19] all: prevent fakePC overflow on 386 in libfuzzer mode
fakePC uses hash.Sum32, which returns an uint32. However, libfuzzer
trace/hook functions declare fakePC argument as int, causing overflow on
386 archs.
Fixing this by changing fakePC argument to uint to prevent the overflow.
Fixes #56168
Change-Id: I3994c461319983ab70065f90bf61539a363e0a2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/441996
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/442435 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Keith Randall <khr@golang.org>
Michael Pratt [Tue, 18 Oct 2022 16:01:18 +0000 (12:01 -0400)]
[release-branch.go1.19] runtime: always keep global reference to mp until mexit completes
Ms are allocated via standard heap allocation (`new(m)`), which means we
must keep them alive (i.e., reachable by the GC) until we are completely
done using them.
Ms are primarily reachable through runtime.allm. However, runtime.mexit
drops the M from allm fairly early, long before it is done using the M
structure. If that was the last reference to the M, it is now at risk of
being freed by the GC and used for some other allocation, leading to
memory corruption.
Ms with a Go-allocated stack coincidentally already keep a reference to
the M in sched.freem, so that the stack can be freed lazily. This
reference has the side effect of keeping this Ms reachable. However, Ms
with an OS stack skip this and are at risk of corruption.
Fix this lifetime by extending sched.freem use to all Ms, with the value
of mp.freeWait determining whether the stack needs to be freed or not.
For #56243.
Fixes #56309.
Change-Id: Ic0c01684775f5646970df507111c9abaac0ba52e
Reviewed-on: https://go-review.googlesource.com/c/go/+/443716
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
(cherry picked from commit e252dcf9d38ce9192bccacb7e33867cbfbd22b6c)
Reviewed-on: https://go-review.googlesource.com/c/go/+/443815 Reviewed-by: Austin Clements <austin@google.com>
Query parameter smuggling occurs when a proxy's interpretation
of query parameters differs from that of a downstream server.
Change ReverseProxy to avoid forwarding ignored query parameters.
Remove unparsable query parameters from the outbound request
* if req.Form != nil after calling ReverseProxy.Director; and
* before calling ReverseProxy.Rewrite.
This change preserves the existing behavior of forwarding the
raw query untouched if a Director hook does not parse the query
by calling Request.ParseForm (possibly indirectly).
Fixes #55843
For #54663
For CVE-2022-2880
Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9
Reviewed-on: https://go-review.googlesource.com/c/go/+/432976 Reviewed-by: Roland Shoemaker <roland@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/433735 Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Now we have 8-byte alignment types on 32-bit system, so in some rare
case, e.g, generated wrapper for embedded interface, the function
argument may need more than 4 byte alignment. We could pad somehow, but
this is a rare case which makes it hard to ensure that we've got it right.
So relaxing the check for argument and return value region of the stack.
Fixes #55152
Change-Id: I34986e17a920254392a39439ad3dcb323da2ea8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/431098 Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/431895
Matthew Dempsky [Thu, 8 Sep 2022 21:31:42 +0000 (14:31 -0700)]
[release-branch.go1.19] cmd/compile: skip emitting dictionaries with missing method expressions
The nounified frontend currently tries to construct dictionaries that
correspond to invalid instantiations (i.e., instantiations T[X] where
X does not satisfy the constraints specified on T's type parameter).
As a consequence, we may fail to find method expressions needed by the
dictionary.
The real fix for this is to avoid creating those dictionaries in the
first place, because they should never actually be needed at runtime.
But that seems scary for a backport: we've repeatedly attempted to
backport generics fixes, which have fixed one issue but introduced
another.
This CL is a minimally invasive solution to #54225, which avoids the
ICE by instead skipping emitting the invalid dictionary. If the
dictionary ends up not being needed (which I believe will always be
the case), then the linker's reachability analysis will simply ignore
its absence.
Or worst case, if the dictionary *is* reachable somehow, we've simply
turned an ICE into a link-time missing symbol failure. That's not
great for user experience, but it seems like a small trade off to
avoid risking breaking any other currently working code.
Fixes #55270.
Change-Id: Ic379696079f4729b1dd6a66994a58cca50281a84
Reviewed-on: https://go-review.googlesource.com/c/go/+/429655 Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/429895 Reviewed-by: Keith Randall <khr@google.com>
Cherry Mui [Thu, 15 Sep 2022 01:01:04 +0000 (21:01 -0400)]
[release-branch.go1.19] cmd/link: suppress -no_pie deprecation warning on darwin
Apparently the new darwin linker starts to emit a warning about
-no_pie deprecation. Maybe we want to switch to PIE by default.
For now, suppress the warning. This also makes it easier for
backporting to previous releases.
Fixes #55114.
Updates #55112, #54482.
Change-Id: I1a3b74c237a9d00ec3b030fc3a9940a31e5cd37e
Reviewed-on: https://go-review.googlesource.com/c/go/+/430937
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 706d84fca2b36fdf670a0d921e6a8a3b481eaa05)
Reviewed-on: https://go-review.googlesource.com/c/go/+/431517
Cherry Mui [Wed, 14 Sep 2022 23:50:00 +0000 (19:50 -0400)]
[release-branch.go1.19] cmd/link: stop passing -pagezero_size to darwin linker
We added -pagezero_size in CL 72730, where it was intented for iOS.
The current code passes it only on macOS/AMD64 instead. It is not
really necessary there. Also, the new darwin linker starts to emit
a warning about deprecation of the flag. Stop passing it.
For #55114.
Updates #55112, #54482.
Change-Id: If9db7a1645c37d4284e48f075856912df8d8c1a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/430936
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
(cherry picked from commit 5231ba2f054f2ecb1387bad00b8745d6fe532ea4)
Reviewed-on: https://go-review.googlesource.com/c/go/+/431515 Reviewed-by: Austin Clements <austin@google.com>
Robert Griesemer [Mon, 12 Sep 2022 22:51:32 +0000 (15:51 -0700)]
[release-branch.go1.19] go/types, types2: allow (string...) signature with NewSignatureType
Includes cases where the core type of the variadic parameter is
a slice or bytestring. Permits a client to create the signature
for various instantiations of append.
Fixes #55149.
Change-Id: I0f4983eb00c088cbe1d87954ee0b2df0ccc3bc49
Reviewed-on: https://go-review.googlesource.com/c/go/+/430455
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com> Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/431935
Keith Randall [Sat, 17 Sep 2022 22:52:35 +0000 (18:52 -0400)]
[release-branch.go1.19] cmd/compile: avoid using destination pointer base type in memmove optimization
The type of the source and destination of a memmove call isn't
always accurate. It will always be a pointer (or an unsafe.Pointer), but
the base type might not be accurate. This comes about because multiple
copies of a pointer with different base types are coalesced into a single value.
In the failing example, the IData selector of the input argument is a
*[32]byte in one branch of the type switch, and a *[]byte in the other branch.
During the expand_calls pass both IDatas become just copies of the input
register. Those copies are deduped and an arbitrary one wins (in this case,
*[]byte is the unfortunate winner).
Generally an op v can rely on v.Type during rewrite rules. But relying
on v.Args[i].Type is discouraged.
Fixes #55124
Change-Id: I348fd9accf2058a87cd191eec01d39cda612f120
Reviewed-on: https://go-review.googlesource.com/c/go/+/431496
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Keith Randall <khr@google.com>
(cherry picked from commit e283473ebbebf4a80db166e7e852d03c5cff1a61)
Reviewed-on: https://go-review.googlesource.com/c/go/+/431917
ir.ClosureExpr implements ir.InitNode, so ir.InitExpr can prepend init
statements to it. However, CalleeEffects wasn't aware of this and
could cause the init statements to get dropped when inlining a call to
a closure.
This isn't an issue today, because we don't create closures with init
statements. But I ran into this within unified IR.
Easy and robust solution: just take advantage that ir.TakeInit can
handle any node.
Fixes #54917.
Change-Id: Ica05fbf6a8c5be4b11927daf84491a1140da5431
Reviewed-on: https://go-review.googlesource.com/c/go/+/422196 Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/429896 Reviewed-by: Michael Knyszek <mknyszek@google.com>
[release-branch.go1.19] runtime/cgo: add -fno-stack-protector to CFLAGS
Some compilers default to having -fstack-protector on, which breaks
when using internal linking because the linker doesn't know how to
find the support functions.
Fixes #54764
(Original fix by Ian Lance Taylor <iant@golang.org>)
Change-Id: I2d8cb7fb780de4cd37314af3957b8f429b1e4b70
Reviewed-on: https://go-review.googlesource.com/c/go/+/429138
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Cherry Mui [Tue, 23 Aug 2022 22:19:06 +0000 (18:19 -0400)]
[release-branch.go1.19 cmd/compile: align stack offset to alignment larger than PtrSize
In typebits.Set we check that the offset is a multiple of the
alignment, which makes perfect sense. But for values like
atomic.Int64, which has 8-byte alignment even on 32-bit platforms
(i.e. the alignment is larger than PtrSize), if it is on stack it
may be under-aligned, as the stack frame is only PtrSize aligned.
Normally we would prevent such values on stack, as the escape
analysis force values with higher alignment to heap. But for a
composite literal assignment like x = AlignedType{...}, the
compiler creates an autotmp for the RHS then copies it to the LHS.
The autotmp is on stack and may be under-aligned. Currently this
may cause an ICE in the typebits.Set check.
This CL makes it align the _offset_ of the autotmp to 8 bytes,
which satisfies the check. Note that this is actually lying: the
actual address at run time may not necessarily be 8-byte
aligned as we only align SP to 4 bytes.
The under-alignment is probably okay. The only purpose for the
autotmp is to copy the value to the LHS, and the copying code we
generate (at least currently) doesn't care the alignment beyond
stack alignment.
Updates #54638.
Fixes #54697.
Change-Id: I13c16afde2eea017479ff11dfc24092bcb8aba6a
Reviewed-on: https://go-review.googlesource.com/c/go/+/425256
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 1211a62bdcb0f070c5082255bcc90e1a14c16bb2)
Reviewed-on: https://go-review.googlesource.com/c/go/+/425935
Cherry Mui [Wed, 24 Aug 2022 22:33:21 +0000 (18:33 -0400)]
[release-branch.go1.19] runtime: mark morestack_noctxt SPWRITE on LR architectures
On LR architectures, morestack (and morestack_noctxt) are called
with a special calling convention, where the caller doesn't save
LR on stack but passes it as a register, which morestack will save
to g.sched.lr. The stack unwinder currently doesn't understand it,
and would fail to unwind from it. morestack already writes SP (as
it switches stack), but morestack_noctxt (which tailcalls
morestack) doesn't. If a profiling signal lands right in
morestack_noctxt, the unwinder will try to unwind the stack and
go off, and possibly crash.
Marking morestack_noctxt SPWRITE stops the unwinding.
Ideally we could teach the unwinder about the special calling
convention, or change the calling convention to be less special
(so the unwinder doesn't need to fetch a register from the signal
context). This is a stop-gap solution, to stop the unwinder from
crashing.
Updates #54332.
Fixes #54675.
Change-Id: I75295f2e27ddcf05f1ea0b541aedcb9000ae7576
Reviewed-on: https://go-review.googlesource.com/c/go/+/425396
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
(cherry picked from commit e4be2ac79f3cc7219ae1cf8334463d11cae24e01)
Reviewed-on: https://go-review.googlesource.com/c/go/+/425615
Cuong Manh Le [Mon, 29 Aug 2022 03:48:28 +0000 (10:48 +0700)]
[release-branch.go1.19] cmd/compile: only inline method wrapper if method don't contain closures
CL 327871 changes methodWrapper to always perform inlining after global
escape analysis. However, inlining the method may reveal closures, which
require walking all function bodies to decide whether to capture free
variables by value or by ref.
To fix it, just not doing inline if the method contains any closures.
Jeremy Quirke [Tue, 9 Aug 2022 17:20:33 +0000 (17:20 +0000)]
[release-branch.go1.19] cmd/link: fix trampolines breaking DWARF line info
When trampolines are needed (e.g. Darwin ARM64), the DWARF LPT (Line
Program Table - see DWARF section 6.1) generation fails because the
replacement symbols are marked as external symbols and skipped during
the DWARF LPT generation phase.
Fixes #54406
Change-Id: I6c93f5378f50e5edf30d5121402a48214abb1ce2
GitHub-Last-Rev: 085bbc55dbc95d55456cc2acc46a0d02416c2848
GitHub-Pull-Request: golang/go#54321
Reviewed-on: https://go-review.googlesource.com/c/go/+/422154 Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 2340d371796f95acdcc399e60f9ecefec2add8df)
Reviewed-on: https://go-review.googlesource.com/c/go/+/423214
Run-TryBot: Cherry Mui <cherryyz@google.com>
Bryan C. Mills [Wed, 24 Aug 2022 13:45:18 +0000 (09:45 -0400)]
[release-branch.go1.19] cmd/go: avoid registering AtExit handlers in tests
Ever since 'go build' was added (in CL 5483069), it has used an atexit
handler to clean up working directories.
CL 154109 introduced 'cc' command to the script test framework that
called Init on a builder once per invocation. Unfortunately, since
base.AtExit is unsynchronized, the Init added there caused any script
that invokes that command to be unsafe for concurrent use.
This change fixes the race by having the 'cc' command pass in its
working directory instead of allowing the Builder to allocate one.
Following modern Go best practices, it also replaces the in-place Init
method (which is prone to typestate and aliasing bugs) with a
NewBuilder constructor function.
MarshalPKIXPublicKey, CreateCertificate, CreateCertificateRequest,
MarshalECPrivateKey, and MarshalPKCS8PrivateKey started raising a panic
when encoding an invalid ECDSA key in Go 1.19. Since they have an error
return value, they should return an error instead.
Damien Neil [Fri, 12 Aug 2022 23:21:09 +0000 (16:21 -0700)]
[release-branch.go1.19] net/url: consistently remove ../ elements in JoinPath
JoinPath would fail to remove relative elements from the start of
the path when the first path element is "".
In addition, JoinPath would return the original path unmodified
when provided with no elements to join, violating the documented
behavior of always cleaning the resulting path.
Normally, when moving Go values of type T from one location to another,
we don't need to worry about partial overlaps. The two Ts must either be
in disjoint (nonoverlapping) memory or in exactly the same location.
There are 2 cases where this isn't true:
1) Using unsafe you can arrange partial overlaps.
2) Since Go 1.17, you can use a cast from a slice to a ptr-to-array.
https://go.dev/ref/spec#Conversions_from_slice_to_array_pointer
This feature can be used to construct partial overlaps of array types.
var a [3]int
p := (*[2]int)(a[:])
q := (*[2]int)(a[1:])
*p = *q
We don't care about solving 1. Or at least, we haven't historically
and no one has complained.
For 2, we need to ensure that if there might be partial overlap,
then we can't use OpMove; we must use memmove instead.
(memmove handles partial overlap by copying in the correct
direction. OpMove does not.)
Note that we have to be careful here not to introduce a call when
we're marshaling arguments to a call or unmarshaling results from a call.
Fixes #54629
Change-Id: I1ca6aba8041576849c1d85f1fa33ae61b80a373d
Reviewed-on: https://go-review.googlesource.com/c/go/+/425076 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
(cherry picked from commit 332a5981d0ae3f21f668f94755f43ecd8ee9a9eb)
Reviewed-on: https://go-review.googlesource.com/c/go/+/425234
Ian Lance Taylor [Fri, 19 Aug 2022 21:43:47 +0000 (14:43 -0700)]
[release-branch.go1.19] misc/cgo/testcarchive: permit SIGQUIT for TestSignalForwardingExternal
Occasionally the signal will be sent to a Go thread, which will cause
the program to exit with SIGQUIT rather than SIGSEGV.
Add TestSignalForwardingGo to test the case where the signal is
expected to be delivered to a Go thread.
This is a roll forward of CL 419014 which was rolled back in CL 424954.
This CL differs from 419014 in that it skips TestSignalForwardingGo
on darwin-amd64.
For #53907
Fixes #54239
Change-Id: I5df3fd610c068df3bd48d9b3d7a9379248b97999
Reviewed-on: https://go-review.googlesource.com/c/go/+/425002
Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Bryan Mills <bcmills@google.com>
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(cherry picked from commit d05ce23756573c6dc2c5026d936f2ef6ac140ee2)
Reviewed-on: https://go-review.googlesource.com/c/go/+/425487 Reviewed-by: David Chase <drchase@google.com>
Michael Pratt [Fri, 12 Aug 2022 18:29:56 +0000 (14:29 -0400)]
[release-branch.go1.19] cmd: vendor github.com/google/pprof to fix mangled type parameter symbol names
Updates github.com/google/pprof to bring in the commit from
https://github.com/google/pprof/pull/717 which fixes mangled
symbol names for type parameters.
For #54105
Fixes #54420
Change-Id: I01af9f780aba3338b960a03b30906a23642e4448
Reviewed-on: https://go-review.googlesource.com/c/go/+/420234
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(cherry picked from commit cd9cd925bb9ed79975f2531a6b84f69905e4fc31)
Reviewed-on: https://go-review.googlesource.com/c/go/+/423356
Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
[release-branch.go1.19] cmd/compile: fix wrong typeparams for selector expr with embedded generic type
For selector expression "x.M" where "M" is a promoted method, irgen is using
the type of receiver "x" for determining the typeparams for instantiation.
However, because M is a promoted method, so its associated receiver is
not "x", but "x.T" where "T" is the embedded field of "x". That casues a
mismatch when converting non-shape types arguments.
Fixing it by using the actual receiver which has the method, instead of
using the base receiver.
Fixes #54243
Change-Id: I1836fc422d734df14e9e6664d4bd014503960bfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/419294
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Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/423114 Reviewed-by: Carlos Amedee <carlos@golang.org>
Matthew Dempsky [Fri, 5 Aug 2022 23:09:22 +0000 (16:09 -0700)]
[release-branch.go1.19] cmd/compile: fix import/export of ODYNAMICDOTTYPE
The RType field isn't needed when performing type assertions from
non-empty interface types, because we use the ITab field instead. But
the inline body exporter didn't know to expect this.
It's possible we could use a single bool to distinguish whether
we're serializing the RType or ITab field, but using two is simpler
and seems safer.
Fixes #54309.
Change-Id: I9ddac72784fb2241fee0a0dee30493d868a2c259
Reviewed-on: https://go-review.googlesource.com/c/go/+/421755
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(cherry picked from commit 0c4db1e347dc51589e5289388305b02108ca0aa1)
Reviewed-on: https://go-review.googlesource.com/c/go/+/421715 Reviewed-by: Than McIntosh <thanm@google.com>
Matthew Dempsky [Mon, 1 Aug 2022 20:23:36 +0000 (13:23 -0700)]
[release-branch.go1.19] test: improve generic type assertion test
The test added in CL 420674 only tested that the type assertions
compiled at all. This CL changes it into a run test to make sure the
type assertions compile and also run correctly.
Updates #54135.
Change-Id: Id17469faad1bb55ff79b0bb4163ef50179330033
Reviewed-on: https://go-review.googlesource.com/c/go/+/420421
Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Keith Randall <khr@golang.org>
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(cherry picked from commit f2a9f3e2e0ce7e582d226ad9a41d3c36b146fc25)
Reviewed-on: https://go-review.googlesource.com/c/go/+/420675 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Wayne Zuo [Sun, 31 Jul 2022 09:20:26 +0000 (17:20 +0800)]
[release-branch.go1.19] cmd/compile: fix wrong dict pass condition for type assertions
Updates #54135.
Change-Id: I2b27af8124014b2699ea44bdc765e1fb8f6c8028
Reviewed-on: https://go-review.googlesource.com/c/go/+/420394 Reviewed-by: Keith Randall <khr@google.com>
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(cherry picked from commit 27038b70f860e29fdf472ac5fb208b6ad9598c10)
Reviewed-on: https://go-review.googlesource.com/c/go/+/420674
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Dmitri Shuralyov [Mon, 1 Aug 2022 17:38:27 +0000 (13:38 -0400)]
doc: move Go 1.19 release notes to x/website
Now that the development of the Go 1.19 release is almost done, its
release notes are moved to their eventual long-term home in x/website
in CL 420417. Delete the initial development copy here.
For golang/go#51400.
Change-Id: I741285555af28ce9a64e7f8d2b9fe2a0f3e13c26
Reviewed-on: https://go-review.googlesource.com/c/go/+/420418 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Change-Id: I30c125be6cb321aa03ea827bd11c3169087e3d4c
Reviewed-on: https://go-review.googlesource.com/c/go/+/420314
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Ian Lance Taylor [Sat, 16 Jul 2022 23:08:35 +0000 (16:08 -0700)]
cmd/dist: always pass -short=true with -quick
Fixes #53818
Change-Id: I190a8bcf50d92b9c10e9980e630ebb362d8b19ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/417918
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A few last-minute clarifications before the release.
Change-Id: Ia0123441633c147aa3f76ea29ed26c7722e2416c
Reviewed-on: https://go-review.googlesource.com/c/go/+/419994 Reviewed-by: Ian Lance Taylor <iant@google.com>
WANG Xuerui [Sat, 16 Jul 2022 12:15:49 +0000 (20:15 +0800)]
doc/go1.19: improve the loong64 release notes
Link to the LoongArch documentations site, mention the ABI variant
supported, and add a note about the unfortunate old-world/new-world split
situation that users must be aware of.
Updates #46229
For #51400
Change-Id: I6789f509263a0dbf113481148665e7951aa6a989
Reviewed-on: https://go-review.googlesource.com/c/go/+/417715
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Cherry Mui [Wed, 27 Jul 2022 16:59:16 +0000 (12:59 -0400)]
misc/cgo/test: use fewer threads in TestSetgidStress in long mode
TestSetgidStress originally spawns 1000 threads for stress testing.
It caused timeout on some builders so CL 415677 reduced to 50 in
short mode. But it still causes flaky timeouts in longtest
builders, so reduce the number of threads in long mode as well.
net: document UDPConn.ReadFromUDPAddrPort's AddrPort result more
Clarify the form of its IPv4 addresses when listening on an
unspecified address.
(found while testing/reviewing CL 399454)
Change-Id: I62b367f5a4e6d340eb72dd7ec342080f1821e63e
Reviewed-on: https://go-review.googlesource.com/c/go/+/419614 Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
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Ian Lance Taylor [Tue, 26 Jul 2022 19:50:02 +0000 (12:50 -0700)]
doc/go1.19: note that updated race syso files require GNU ld 2.26
For #54060
Change-Id: I6360565056d7fb7110ff00b0f3f9a3fc02ba7f2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/419595 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
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Muhammed Can Küçükaslan [Sun, 24 Jul 2022 21:44:11 +0000 (21:44 +0000)]
bytes: document that Reader.Reset affects the result of Size
The Reader.Reset changes the underlying byte slice, so it actually
changes the return value of the Size method.
Fixes #54018
Change-Id: I160deaa2244e95cb93303cb5dfb67a8d90a375ef
GitHub-Last-Rev: b04724a072d956db1f84a8f5db0afa0dbb158e96
GitHub-Pull-Request: golang/go#54020
Reviewed-on: https://go-review.googlesource.com/c/go/+/419237 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
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Cherry Mui [Mon, 25 Jul 2022 15:02:56 +0000 (11:02 -0400)]
runtime/cgo: use frame address to set g0 stack bound
For a cgo binary, at startup we set g0's stack bounds using the
address of a local variable (&size) in a C function x_cgo_init and
the stack size from pthread_attr_getstacksize. Normally, &size is
an address within the current stack frame. However, when it is
compiled with ASAN, it may be instrumented to __asan_stack_malloc_0
and the address may not live in the current stack frame, causing
the stack bound to be set incorrectly, e.g. lo > hi.
Using __builtin_frame_address(0) to get the stack address instead.
Change-Id: I41df929e5ed24d8bbf3e15027af6dcdfc3736e37
Reviewed-on: https://go-review.googlesource.com/c/go/+/419434
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Marcus Watkins [Thu, 21 Jul 2022 18:38:51 +0000 (12:38 -0600)]
time: clarify documentation for allowed formats and add tests to prove them
The existing documentation for the time.Layout const states "Only these values
are recognized", but then doesn't include the numeric forms for month leading to
ambiguity and assumptions that may not be true. It's unclear, for example,
that space padding is only available for day of the month.
Finally I add tests to show the behaviors in specific scenarios.
Change-Id: I4e08a14834c17b6bdf3b6b47d39dafa8c1a138fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/418875 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
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The correct word to use here is 'retrieve' not 'retrive'
Change-Id: I8de0961a254cf429ddbaf599fe996155e24c7af2
GitHub-Last-Rev: 65aaeec8db14c23e7bc8a62ce9ecfde98a263a49
GitHub-Pull-Request: golang/go#54026
Reviewed-on: https://go-review.googlesource.com/c/go/+/419317 Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
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Cherry Mui [Thu, 21 Jul 2022 22:23:39 +0000 (18:23 -0400)]
cmd/compile: make jump table symbol local
When using plugins, if the plugin and the main executable both
have the same function, and if it uses jump table, currently the
jump table symbol have the same name so it will be deduplicated by
the dynamic linker. This causes a function in the plugin may (in
the middle of the function) jump to the function with the same name
in the main executable (or vice versa). But the function may be
compiled slightly differently, because the plugin needs to be PIC.
Jumping from the middle of one function to the other will not work.
Avoid this problem by marking the jump table symbol local to a DSO.
Fixes #53989.
Change-Id: I2b573b9dfc22401c8a09ffe9b9ea8bb83d3700ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/418960 Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
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In 2009, Google's open-source lawyers asked us to create the AUTHORS
file to define "The Go Authors", and the CONTRIBUTORS file was in
keeping with open source best practices of the time.
Re-reviewing our repos now in 2022, the open-source lawyers are
comfortable with source control history taking the place of the
AUTHORS file, and most open source projects no longer maintain
CONTRIBUTORS files.
To ease maintenance, remove AUTHORS and CONTRIBUTORS from all repos.
Ian Lance Taylor [Sat, 16 Jul 2022 22:51:25 +0000 (15:51 -0700)]
unsafe: document when Sizeof/Offsetof/Alignof are not constant
They are not constant if their arguments have types that are variable size.
Fixes #53921
Change-Id: I2d46754c27f55a281331c099a11ea3cd85ec4e89
Reviewed-on: https://go-review.googlesource.com/c/go/+/417917
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Dmitri Shuralyov [Thu, 21 Jul 2022 21:09:35 +0000 (17:09 -0400)]
net/http: remove accidental heading in Head documentation
This short sentence was missing a period at the end, which caused it
to be interpreted as a heading. It also gained a '# ' prefix as part
of new gofmt formatting applied in CL 384268. This change makes it a
regular sentence as originally intended.
Updates #51082.
Change-Id: I100410cca21e4f91130f1f3432327bb6d66b12a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/418959
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Keith Randall [Wed, 20 Jul 2022 19:46:33 +0000 (12:46 -0700)]
cmd/cgo: allow cgo to pass strings or []bytes bigger than 1<<30
There's no real reason to limit to 1<<30 bytes. Maybe it would catch
some mistakes, but probably ones that would quickly manifest in other
ways.
We can't use the fancy new unsafe.Slice function because this code
may still be generated for people with 1.16 or earlier in their go.mod file.
Use unsafe shenanigans instead.
Fixes #53965
Fixes #53958
Change-Id: Ibfa095192f50276091d6c2532e8ccd7832b57ca8
Reviewed-on: https://go-review.googlesource.com/c/go/+/418557
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Keith Randall [Tue, 19 Jul 2022 22:35:51 +0000 (15:35 -0700)]
test: use go tool from tree, not path
Some of our tests do exec.Command("go", "tool", "compile", ...) or
similar. That "go" is selected from PATH. When run.go is started
from the command line (but not from all.bash), the first "go" is whatever
happens to be first in the user's path (some random older version than
tip). We really want all these tests to use the "go" tool from the
source tree under test. Add GOROOT/bin to the front of the path to
ensure that the tools we use come from the source tree under test.
Change-Id: I609261a4add8cd5cb228316752d52b5499aec963
Reviewed-on: https://go-review.googlesource.com/c/go/+/418474
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Dan Kortschak [Sat, 16 Jul 2022 23:13:55 +0000 (08:43 +0930)]
crypto/internal/nistec,debug/gosym: fix typos
Change-Id: I228a23754656b41843573bd4217de4df46c9df36
Reviewed-on: https://go-review.googlesource.com/c/go/+/417954
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Change-Id: I2cef8fa2a61fc69b9b21ff75428af428d99ae2f2
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Michael Anthony Knyszek [Thu, 14 Jul 2022 21:19:37 +0000 (21:19 +0000)]
runtime: revert to using the precomputed trigger for pacer calculations
Issue #53738 describes in detail how switching to using the actual
trigger point over the precomputed trigger causes a memory regression,
that arises from the fact that the PI controller in front of the
cons/mark ratio has a long time constant (for overdamping), so it
retains a long history of inputs.
This change, for the Go 1.19 cycle, just reverts to using the
precomputed trigger because it's safer, but in the future we should
consider moving away from such a history-sensitive smoothing function.
See the big comment in the diff and #53738 for more details.
Performance difference vs. 1.18 after this change:
https://perf.golang.org/search?q=upload:20220714.15
Fixes #53738.
Change-Id: I636993a730a3eaed25da2a2719860431b296c6f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/417557
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Change-Id: Ia3c12bff8556b6a8d33b700c59357f47502757b1
GitHub-Last-Rev: c64cf47974020c8480039ba61d0890bdc07a3b0f
GitHub-Pull-Request: golang/go#53917
Reviewed-on: https://go-review.googlesource.com/c/go/+/417915 Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Keith Randall <khr@google.com>
minherz [Mon, 13 Jun 2022 05:26:02 +0000 (22:26 -0700)]
http: improve Get documentation
The existing documentation is unclear about header keys formatting.
The clarifying sentence is added to Get function to emphasis that
keys have to be stored in canonical format to have Get returining
non empty value.
Fixes #53140
Change-Id: Icd0955bcbb6676cec028fe37042aed5846e13ed1
Reviewed-on: https://go-review.googlesource.com/c/go/+/417975
Run-TryBot: Damien Neil <dneil@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>