The check is not relevant anymore.
The comment claims that go run does not rebuild packages,
but this is not true. And we use go build anyway.
We may have added the check because without caching
rebuilding everything starting from runtime for each test
takes a while. But now we have caching.
So from every side this check just adds code and pain.

Change-Id: Ifbbb643724100622e5f9db884339b67cde4ba729
Reviewed-on: https://go-review.googlesource.com/c/go/+/202450
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The hash is used in type switches. However, compiler statically generates itab's
for all interface/type pairs used in switches (which are added to itabTable
in itabsinit). The dynamically-generated itab's never participate in type switches,
and thus the hash is irrelevant.

Change-Id: I4f6e37be31b8f5605cca7a1806cb04708e948cea
Reviewed-on: https://go-review.googlesource.com/c/go/+/202448
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Keith Randall <khr@golang.org>

Change-Id: Ide3b689dd6808fc82f6310e4608e6d3574fafa82
Reviewed-on: https://go-review.googlesource.com/c/go/+/205339
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Previously we would always “upgrade” to the semantically-highest
version, even if a newer compatible version exists.

That made certain classes of mistakes irreversible: in general we
expect users to address bad releases by releasing a new (higher)
version, but if the bad release was an unintended +incompatible
version, then no release that includes a go.mod file can ever have a
higher version, and the bad release will be treated as “latest”
forever.

Instead, when considering a +incompatible version we now consult the
latest compatible (v0 or v1) release first. If the compatible release
contains a go.mod file, we ignore the +incompatible releases unless
they are expicitly requested (by version, commit ID, or branch name).

Fixes #34165
Updates #34189

Change-Id: I7301eb963bbb91b21d3b96a577644221ed988ab7
Reviewed-on: https://go-review.googlesource.com/c/go/+/204440
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

Also revert an incidental 'gofmt' of a vendored file from CL 205240.

Updates #34822

Change-Id: I82a015d865db4d865b4776a8013312f25dbb9181
Reviewed-on: https://go-review.googlesource.com/c/go/+/205539
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

codeRepo.Versions previously checked every possible +incompatible
version for a 'go.mod' file. That is wasteful and counterproductive.

It is wasteful because typically, a project will adopt modules at some
major version, after which they will (be required to) use semantic
import paths for future major versions.

It is counterproductive because it causes an accidental
'+incompatible' tag to exist, and no compatible tag can have higher
semantic precedence.

This change prunes out some of the +incompatible versions in
codeRepo.Versions, eliminating the “wasteful” part but not all of the
“counterproductive” part: the extraneous versions can still be fetched
explicitly, and proxies may include them in the @v/list endpoint.

Updates #34165
Updates #34189
Updates #34533

Change-Id: Ifc52c725aa396f7fde2afc727d0d5950acd06946
Reviewed-on: https://go-review.googlesource.com/c/go/+/204439
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>

We had some issues with reports being marked as spam, so I added a
filter to never mark as spam something that mentions the word
"vulnerability". We get too much spam at that address to disable the
filter entirely, so instead meantion the bypass in the docs.

Change-Id: Idb4dabcf51a9dd8234a2d571cd020c970b0a582c
Reviewed-on: https://go-review.googlesource.com/c/go/+/205538Reviewed-by: Katie Hockman <katie@golang.org>

Fixes #35247

Change-Id: I4f2e243c89e9f745b82bcd181add87fad1443171
Reviewed-on: https://go-review.googlesource.com/c/go/+/205457
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

dsa.Verify might currently use a nil s inverse in a
multiplication if the public key contains a non-prime Q,
causing a panic. Change this to check that the mod
inverse exists before using it.

Fixes CVE-2019-17596

Fixes #34960

Change-Id: I94d5f3cc38f1b5d52d38dcb1d253c71b7fd1cae7
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/572809Reviewed-by: Filippo Valsorda <valsorda@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/205441
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

Fixes #35317

Change-Id: Id858a25dc16a1bbff1802d25bcd4aca31c1133bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/205067
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

When using cgo, we save G to TLS, and when a signal happens, we
load G from TLS in sigtramp. This should give us a valid G. Don't
try to fetch from the signal stack. In particular, C code may
change the signal stack or call our signal handler directly (e.g.
TSAN), so we are not necessarily running on the original gsignal
stack where we saved G.

Also skip saving G on the signal stack when using cgo.

Updates #35249.

Change-Id: I40749ce6682709bd4ebfdfd9f23bd0f317fc197d
Reviewed-on: https://go-review.googlesource.com/c/go/+/204519Reviewed-by: Ian Lance Taylor <iant@golang.org>

In the normal case, sigFetchG just returns the G register. But in
the case that sigFetchG fetches the G from somewhere else, the G
register still holding an invalid value. Setg here to make sure
they match.

This is particularly useful because setGsignalStack, called by
adjustSignalStack from sigtrampgo before setg to gsignal,
accesses the G register.

Should fix #35249.

Change-Id: I64c85143cb05cdb2ecca7f9936dbd8bfec186c2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/204441Reviewed-by: Ian Lance Taylor <iant@golang.org>

Before this CL adjustTimers left timers being moved in an inconsistent
state: status timerWaiting but not on a P. Simplify the code by
leaving the timers in timerMoving status until they are actually moved.
Other functions (deltimer, modtimer) will wait until the move is complete
before changing anything on the timer. This does leave timers in timerMoving
state for longer, but still not all that long.

Fixes #35367

Change-Id: I31851002fb4053bd6914139125b4c82a68bf6fb2
Reviewed-on: https://go-review.googlesource.com/c/go/+/205418
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

Updates #32027

Change-Id: Ifc9427f35188c3fd356917d8510f3e01866ebca8
Reviewed-on: https://go-review.googlesource.com/c/go/+/205065
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

TestFormats adds ~3s of running time to the test, which may be
slightly annoying in an edit/compile/test cycle but is negligible in a
TryBot run.

The test keeps regressing in the longtest builders, requiring a manual
fix. Instead, run it even in short mode on the builders, so that
TryBot runs will detect regressions ahead of time.

Updates #34907
Updates #33915
Updates #28621

Change-Id: I6f9bf0f2ca929a743438310b86d85d8673c720bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/205440
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Adds missing tests for all the types:
* OneByteReader
* HalfReader
* DataErrReader
* TimeoutReader
* TruncateWriter
* writeLogger
* readLogger

Fixes #33650

Change-Id: I1c773f9f1625ff33a1d0b5a045c72a73a9eca9ce
GitHub-Last-Rev: 2ab650677bb9cad43ea2ce620c9898123c7ec396
GitHub-Pull-Request: golang/go#33651
Reviewed-on: https://go-review.googlesource.com/c/go/+/190259Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Once defined, a stack slot holding an open-coded defer arg should always be marked
live, since it may be used at any time if there is a panic. These stack slots are
typically kept live naturally by the open-defer code inlined at each return/exit point.
However, we need to do extra work to make sure that they are kept live if a
function has an infinite loop or a panic exit.

For this fix, only in the case of a function that is using open-coded defers, we
compute the set of blocks (most often empty) that cannot reach a return or a
BlockExit (panic) because of an infinite loop. Then, for each block b which
cannot reach a return or BlockExit or is a BlockExit block, we mark each defer arg
slot as live, as long as the definition of the defer arg slot dominates block b.

For this change, had to export (*Func).sdom (-> Sdom) and SparseTree.isAncestorEq
(-> IsAncestorEq)

Updates #35277

Change-Id: I7b53c9bd38ba384a3794386dd0eb94e4cbde4eb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/204802
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

TestExecutableGOROOT, unlike most other tests in go_test.go, was
running subcommands in a process with an environment derived directly
from os.Environ(), rather than using tg.env on its testgoData object.

Since tg.env is what sets GO111MODULE=off for GOPATH-mode tests, that
caused TestExecutableGOROOT to unexpectedly run in module mode instead
of GOPATH mode. If the user's environment included 'GOFLAGS=-mod=mod',
that would cause the test to spuriously fail due to the inability to
download modules to $HOME (which in this test binary is hard-coded to
"/test-go-home-does-not-exist").

Updates #33848

Change-Id: I2f343008dd9e38cd76b9919eafd5a3181d0cbd6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/205064
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The test for gopkg.in/yaml.v2@v2 assumes that there are
no future upstream releases. That assumption empirically
does not hold. Backporting fixes to this test is annoying,
and other gopkg.in cases are already reasonably covered,
so remove the problematic test.

Updates #28856

Change-Id: I6455baa1816ac69e02d1ad5d03b82a93e1481a17
Reviewed-on: https://go-review.googlesource.com/c/go/+/205437
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates #34822

Change-Id: I189d93ebd3ce6cd1b8f1e29336876fd82a7cfff7
Reviewed-on: https://go-review.googlesource.com/c/go/+/204877
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Recent Xcode versions started to complain about the current min
version:

ld: warning: OS version (6.0.0) too small, changing to 7.0.0

Change-Id: Ieb525dd3e57429fe226b9d30d584b073c5e4768c
Reviewed-on: https://go-review.googlesource.com/c/go/+/204663Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This does not include an upgrade of golang.org/x/net.
This is optional and best done as a separate CL.

Change-Id: Ifecc3fb6e3b7fe026b4ddefbe637186a3445b0bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/204658
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #35347

Change-Id: If7380f29e97a5abe86cdd5e2853323de7997ccfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/205378
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

CL 196959 uses %v to print *EscLocation values. This happens at least at
    Fatalf("path inconsistency: %v != %v", edge.src, src)
in (*Escape).explainPath.

Change-Id: I1c761406af6a1025403dfefa5ec40aee75e72944
Reviewed-on: https://go-review.googlesource.com/c/go/+/205377
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Pick up a dropped error in TestSendMailWithAuth() and simplify goroutine
to use an error channel instead of a sync.WaitGroup and an empty struct
doneCh.

Change-Id: Ie70d0f7c4c85835eb682e81d086ce4d9900269e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/205247
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The flag field will be used for marking unsafe points. This CL
just adds the field, not doing anything with it. The next CL will
make use of it. This is for making the diff simpler.

Change-Id: I6ff5406ba2e53ae8a882184733d88482a2ca8e2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/203938
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

Frameless function is an interesting case for call injection
espcially for LR architectures. Extend the test for this case.

Change-Id: I074090d09eeaf642e71e3f44fea216f66d39b817
Reviewed-on: https://go-review.googlesource.com/c/go/+/202339
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

Change-Id: I9cfaba4f1af23ab67627bf496739311e4d1984c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/205245Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Introduce a mechanism for marking architecture-specific Ops
unsafe. And mark ones that use REGTMP on ARM64, as for async
preemption we will be using REGTMP as a temporary register in the
injected call.

Change-Id: I8ff22e87d8f9cb10d02a2f0af7c12ad6d7d58f54
Reviewed-on: https://go-review.googlesource.com/c/go/+/203459
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>

For async preemption, we will be using REGTMP as a temporary
register in injected call on ARM64, which will clobber it. So any
code that uses REGTMP is not safe for async preemption.

For ZeroRange, which is inserted at the function entry where
there is no register live, we could just use a different register
and avoid REGTMP.

Change-Id: I3db763828df6846908c9843a9912597efb9efcdf
Reviewed-on: https://go-review.googlesource.com/c/go/+/203458
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

This CL adds support of call injection and async preemption on
ARM.

Injected call, like sigpanic, has special frame layout. Teach
traceback to handle it.

Change-Id: I887e90134fbf8a676b73c26321c50b3c4762dba4
Reviewed-on: https://go-review.googlesource.com/c/go/+/202338
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>

Actual fix will be submitted to x/tools and vendored.
This is just an end-to-end test for vet after that is done.

Update #35264

Change-Id: I1a63f607e7cfa7aafee23c2c081086c276d3c38c
Reviewed-on: https://go-review.googlesource.com/c/go/+/204538
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>

The logic for keeping arguments alive for calls to //go:uintptrescapes
functions was only applying to direct function calls. This CL changes
it to also apply to direct method calls, which should address most
uses of Proc.Call and LazyProc.Call.

It's still an open question (#34684) whether other call forms (e.g.,
method expressions, or indirect calls via function values, method
values, or interfaces).

Fixes #34474.

Change-Id: I874f97145972b0e237a4c9e8926156298f4d6ce0
Reviewed-on: https://go-review.googlesource.com/c/go/+/198043
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

Programs should always check the error return of Close for a file opened
for writing. Update the example code in the comment to mention this.

Change-Id: I2ff6866ff1fe23b47c54268ac8e182210cc876c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/202137Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

As a side-effect ensure that netpollinited only reports true when
netpoll initialization is complete.

Fixes #35282
Updates #35353

Change-Id: I21f08a04fcf229e0de5e6b5ad89c990426ae9b89
Reviewed-on: https://go-review.googlesource.com/c/go/+/204937
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #35264

Change-Id: Id540a48f593d8ac1b414551255c5eff24666aa0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/205240
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This CL extends cmd/compile's experimental libFuzzer support with
calls to __sanitizer_cov_trace_{,const_}cmp{1,2,4,8}. This allows much
more efficient fuzzing of comparisons.

Only supports amd64 and arm64 for now.

Updates #14565.

Change-Id: Ibf82a8d9658f2bc50d955bdb1ae26723a3f0584d
Reviewed-on: https://go-review.googlesource.com/c/go/+/203887
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

This CL adds experimental coverage instrumentation similar to what
github.com/dvyukov/go-fuzz produces in its -libfuzzer mode. The
coverage can be enabled by compiling with -d=libfuzzer. It's intended
to be used in conjunction with -buildmode=c-archive to produce an ELF
archive (.a) file that can be linked with libFuzzer. See #14565 for
example usage.

The coverage generates a unique 8-bit counter for each basic block in
the original source code, and emits an increment operation. These
counters are then collected into the __libfuzzer_extra_counters ELF
section for use by libFuzzer.

Updates #14565.

Change-Id: I239758cc0ceb9ca1220f2d9d3d23b9e761db9bf1
Reviewed-on: https://go-review.googlesource.com/c/go/+/202117
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

This change renames the "round" function to the more appropriately named
"alignUp" which rounds an integer up to the next multiple of a power of
two.

This change also adds the alignDown function, which is almost like
alignUp but rounds down to the previous multiple of a power of two.

With these two functions, we also go and replace manual rounding code
with it where we can.

Change-Id: Ie1487366280484dcb2662972b01b4f7135f72fec
Reviewed-on: https://go-review.googlesource.com/c/go/+/190618Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Keith Randall <khr@golang.org>

Fixes #35082
Updates #6853

Change-Id: I4eeb0e15f534cff57fefb6039cd33fadf15b946e
Reviewed-on: https://go-review.googlesource.com/c/go/+/205139Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>