…from extend string

If the current time is computed from extend string
and the zone file contains multiple zones with the
same name, the lookup by name might find incorrect
zone.

This happens for example with the slim Europe/Dublin
time zone file in the embedded zip. This zone file
has last transition in 1996 and rest is covered by
extend string.
tzset returns IST as the zone name to use, but there
are two records with IST name. Lookup by name finds
the wrong one. We need to check offset and isDST too.

In case we can't find an existing zone, we allocate
a new zone so that we use correct offset and isDST.

I have renamed zone variable to zones as it shadowed
the zone type that we need to allocate the cached zone.

Backport note: this change also incorporates portions of
CL 264077.

For #45370
Fixes #45385

Change-Id: If7a0cccc1908e27f0509bf422d824133133250fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/307211
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Emmanuel Odeke <[email protected]>

…0-3f4a416c7d3b

Steps:
  go get -d golang.org/x/[email protected]
  go mod tidy
  go mod vendor

This http2 bundle does not need to be updated.

Fixes #45712

Change-Id: I7c86c31248e0cd250d17495c3f985671cfcf44a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/314789
Trust: Katie Hockman <[email protected]>
Run-TryBot: Katie Hockman <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

…o/fs.FS

While we're here fix the ModTime value for directories.

For #43872
For #45345
Fixes #45347

Change-Id: I155e6517713ef6a9482b9431f1167a44337c6ad2
Reviewed-on: https://go-review.googlesource.com/c/go/+/311530
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Jeremy Faller <[email protected]>
(cherry picked from commit 87e4dcd)
Reviewed-on: https://go-review.googlesource.com/c/go/+/315249
Trust: Jeremy Faller <[email protected]>

…pandFinalInlineFrame

This is a follow-up to golang.org/cl/301369, which made the same change
in Frames.Next. The same logic applies here: a profile stack may have
been truncated at an invalid PC provided by cgoTraceback.
expandFinalInlineFrame will then try to lookup the inline tree and
crash.

The same fix applies as well: upon encountering a bad PC, simply leave
it as-is and move on.

For #44971
For #45480
Fixes #45482

Change-Id: I2823c67a1f3425466b05384cc6d30f5fc8ee6ddc
Reviewed-on: https://go-review.googlesource.com/c/go/+/309109
Reviewed-by: Michael Knyszek <[email protected]>
Trust: Michael Pratt <[email protected]>
(cherry picked from commit aad13cb)
Reviewed-on: https://go-review.googlesource.com/c/go/+/309551
Run-TryBot: Michael Pratt <[email protected]>
Reviewed-by: Cherry Zhang <[email protected]>
TryBot-Result: Go Bot <[email protected]>

The shift amount should be masked to avoid rotation values
beyond the numer of bits. In this case, if the shift amount
is 0, it should rotate 0, not 32.

Fixes #45636

Change-Id: I1e764497a39d0ec128e29af42352b70c70b2ecc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/310569
Run-TryBot: Paul Murphy <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Lynn Boger <[email protected]>
Reviewed-by: Carlos Eduardo Seo <[email protected]>
Trust: Carlos Eduardo Seo <[email protected]>
(cherry picked from commit c8fb0ec)
Reviewed-on: https://go-review.googlesource.com/c/go/+/311378
Reviewed-by: Keith Randall <[email protected]>
Run-TryBot: Keith Randall <[email protected]>
Trust: Lynn Boger <[email protected]>

…dling fixes

The runtime support for syscall.AllThreadsSyscall() functions had
some corner case deadlock issues when signal handling was in use.
This was observed in at least 3 build test failures on ppc64 and
amd64 architecture CGO_ENABLED=0 builds over the last few months.

The fixes involve more controlled handling of signals while the
AllThreads mechanism is being executed. Further details are
discussed in bug #44193.

The all-threads syscall support is new in go1.16, so earlier
releases are not affected by this bug.

Fixes #45307

Change-Id: I01ba8508a6e1bb2d872751f50da86dd07911a41d
Reviewed-on: https://go-review.googlesource.com/c/go/+/305149
Reviewed-by: Michael Pratt <[email protected]>
Trust: Michael Pratt <[email protected]>
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Michael Pratt <[email protected]>
TryBot-Result: Go Bot <[email protected]>
(cherry picked from commit 7e97e4e)
Reviewed-on: https://go-review.googlesource.com/c/go/+/316869
Run-TryBot: Ian Lance Taylor <[email protected]>

Most of the time, the pprof tests are passing, except
for the builder. The reason is still unknown but I'd rather release
the builder to avoid missing other more important bugs.

Updates #45170

Change-Id: I667543ee1ae309b7319c5b3676a0901b4d0ecf2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/306489
Run-TryBot: Tobias Klauser <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Cherry Zhang <[email protected]>
Trust: Lynn Boger <[email protected]>
(cherry picked from commit 7bfd681)
Reviewed-on: https://go-review.googlesource.com/c/go/+/317297
Trust: Heschi Kreinick <[email protected]>
Run-TryBot: Heschi Kreinick <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Change-Id: I7fb3c30641332961819a79819c7567cf1dbe1ab1
Reviewed-on: https://go-review.googlesource.com/c/go/+/317649
Run-TryBot: Heschi Kreinick <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>
Trust: Carlos Amedee <[email protected]>
Trust: Heschi Kreinick <[email protected]>