The Builder's ReadFrom method allows the underlying unsafe slice to
escape, and for callers to subsequently modify memory that had been
unsafely converted into an immutable string.
In the original proposal for Builder (#18990), I'd noted there should
be no Read methods:
> There would be no Reset or Bytes or Truncate or Read methods.
> Nothing that could mutate the []byte once it was unsafely converted
> to a string.
And in my prototype (https://golang.org/cl/37767), I handled ReadFrom
properly, but when https://golang.org/cl/74931 arrived, I missed that
it had a ReadFrom method and approved it.
Because we're so close to the Go 1.10 release, just remove the
ReadFrom method rather than think about possible fixes. It has
marginal utility in a Builder anyway.
Also, fix a separate bug that also allowed mutation of a slice's
backing array after it had been converted into a slice by disallowing
copies of the Builder by value.
Updates #18990Fixes#23083Fixes#23084
Change-Id: Id1f860f8a4f5f88b32213cf85108ebc609acb95f
Reviewed-on: https://go-review.googlesource.com/83255
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Also includes all derived values as well as
vendored packages.
Generated by running
UNICODE_VERSION=10.0.0 go generate
in golang.org/x/text
and modified by hand to add the tests and
entries in next.txt for new script and properties.
Closes Issue #21471
Change-Id: I1d10ee3887bd1fd3d5a756ee0d04bd6ec2814ba1
Reviewed-on: https://go-review.googlesource.com/63953
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
Increase MaxBase from 36 to 62 and extend the conversion
alphabet with the upper-case letters 'A' to 'Z'. For int
conversions with bases <= 36, the letters 'A' to 'Z' have
the same values (10 to 35) as the corresponding lower-case
letters. For conversion bases > 36 up to 62, the upper-case
letters have the values 36 to 61.
Added MaxBase to api/except.txt: Clients should not make
assumptions about the value of MaxBase being constant.
The core of the change is in natconv.go. The remaining
changes are adjusted tests and documentation.
Fixes#21558.
Change-Id: I5f74da633caafca03993e13f32ac9546c572cc84
Reviewed-on: https://go-review.googlesource.com/65970
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
For compatibility with math/bits uint operations.
When math/big was written originally, the Go compiler used 32bit
int/uint values even on a 64bit machine. uintptr was the type that
represented the machine register size. Now, the int/uint types are
sized to the native machine register size, so they are the natural
machine Word type.
On most machines, the size of int/uint correspond to the size of
uintptr. On platforms where uint and uintptr have different sizes,
this change may lead to performance differences (e.g., amd64p32).
Change-Id: Ief249c160b707b6441848f20041e32e9e9d8d8ca
Reviewed-on: https://go-review.googlesource.com/37372
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Drivers which previously supported tip will need to update to this
revision before release.
Fixes#18284
Change-Id: I70b8e7afff1558a8b5348885ce9f50e067c72ee9
Reviewed-on: https://go-review.googlesource.com/34330
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Change the openbsd runtime to use the current sys_kill and sys_thrkill
system calls.
Prior to OpenBSD 5.9 the sys_kill system call could be used with both
processes and threads. In OpenBSD 5.9 this functionality was split into
a sys_kill system call for processes (with a new syscall number) and a
sys_thrkill system call for threads. The original/legacy system call was
retained in OpenBSD 5.9 and OpenBSD 6.0, however has been removed and
will not exist in the upcoming OpenBSD 6.1 release.
Note: This change is needed to make Go work on OpenBSD 6.1 (to be
released in May 2017) and should be included in the Go 1.8 release.
This change also drops support for OpenBSD 5.8, which is already an
unsupported OpenBSD release.
Change-Id: I525ed9b57c66c0c6f438dfa32feb29c7eefc72b0
Reviewed-on: https://go-review.googlesource.com/34093
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This adds a counter for the number of times the application forced a
GC by, e.g., calling runtime.GC(). This is useful for detecting
applications that are overusing/abusing runtime.GC() or
debug.FreeOSMemory().
Fixes#18217.
Change-Id: I990ab7a313c1b3b7a50a3d44535c460d7c54f47d
Reviewed-on: https://go-review.googlesource.com/34067
Reviewed-by: Russ Cox <rsc@golang.org>
... so we don't have to export gosym.PCValue.
Change-Id: Ie8f196d5e5ab63e3e69d1d7b4bfbbf32b7b5e4f5
Reviewed-on: https://go-review.googlesource.com/33791
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Both automated updates with a few tweaks.
Change-Id: I24579a8dcc32a84a4fff5c2212681ef30dda61d1
Reviewed-on: https://go-review.googlesource.com/33297
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Currently, we don't have package testing to import package regexp directly,
because then regexp can't have internal tests (or at least they become more
difficult to write), for fear of an import cycle. The solution we've been using
is for the generated test main package (pseudo-import path "testmain", package main)
to import regexp and pass in a matchString function for use by testing when
implementing the -run flags. This lets testing use regexp but without depending
on regexp and creating unnecessary cycles.
We want to add a few dependencies to runtime/pprof, notably regexp
but also compress/gzip, without causing those packages to have to work
hard to write internal tests.
Restructure the (dare I say it) dependency injection of regexp.MatchString
to be more general, and use it for the runtime/pprof functionality in addition
to the regexp functionality. The new package testing/internal/testdeps is
the root for the testing dependencies handled this way.
Code using testing.MainStart will have to change from passing in a matchString
implementation to passing in testdeps.TestDeps{}. Users of 'go test' don't do this,
but other build systems that have recreated 'go test' (for example, Blaze/Bazel)
may need to be updated. The new testdeps setup should make future updates
unnecessary, but even so we keep the comment about MainStart not being
subject to Go 1 compatibility.
Change-Id: Iec821d2afde10c79f95f3b23de5e71b219f47b92
Reviewed-on: https://go-review.googlesource.com/32455
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Make it easier to find lines and update the file.
Change-Id: I9db78ffd7316fbc17c5488e178e23777756d8f47
Reviewed-on: https://go-review.googlesource.com/32454
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This field is a zero length array and has little use. Since Go 1.5, trailing
zero-length arrays take up space. Both syscall.UnixRights() and
syscall.ParseSocketControlMessage() depend on being able to do an unsafe cast
of socket control message data to Cmsghdr this is only safe if the socket
control message data is greater than or equal to the size of Cmsghdr. Since
control message data that is equal in size to Cmsghdr without X__cmsg_data is
a valid socket control message, we must remove X__cmsg_data or not perform the
unsafe cast.
Removing X__cmsg_data will prevent Go code that uses X__cmsg_data from
compiling, but removing the unsafe cast will cause Go code that uses
X__cmsg_data to fail or exhibit undefined behavior at runtime. It was
therefore decided that removing X__cmsg_data was the better option.
Fixes#17649
Change-Id: I39f323f978eca09d62da5785c5c5c9c7cbdf8c31
Reviewed-on: https://go-review.googlesource.com/32319
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Changes beyond generated tables:
- Now supports aliases to handle deprecated
property classes.
- Some Mongolian letters are now modifiers.
Other changes:
- strconv: newly generated table to be in sync
- regexp/syntax: updated maxFold
Fixes#16191
Change-Id: I56bdf21ee2f775f2a82d0465b3772faf5c24cb61
Reviewed-on: https://go-review.googlesource.com/24496
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This method and field were added and then later removed during the 1.7
development cycle.
Change-Id: I0482a6356b91d2be67880b44ef5d8a1daab49ec8
Reviewed-on: https://go-review.googlesource.com/23670
Reviewed-by: Chris Broadfoot <cbro@golang.org>
It's not clear we want to enshrine an io interface in which Size cannot
return an error. Because this requires more thought before committing
to the API, remove from Go 1.7.
Fixes#15818.
Change-Id: Ic4138ffb0e033030145a12d33f78078350a8381f
Reviewed-on: https://go-review.googlesource.com/23392
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
See CL 22720 for details.
Updates #15345
Change-Id: If93ddbb8137d57da9846b671160b4cebe1992570
Reviewed-on: https://go-review.googlesource.com/22752
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This future-proofs the Chdr64 structure against later versions of ELF
defining this field and declutters the documentation without changing
the layout of the struct.
This structure does not exist in the current release, so this change
is safe.
Change-Id: I239aad7243ddaf063a1f8cd521d8a50b30413281
Reviewed-on: https://go-review.googlesource.com/18028
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Use two internal representations for Float values (similar to what is done
for Int values). Transparently switch to a big.Float representation when
big.Rat values become unwieldy. This is almost never needed for real-world
programs but it is trivial to create test cases that cannot be handled with
rational arithmetic alone.
As a consequence, the go/constant API semantics changes slightly: Until now,
a value could always be represented in its "smallest" form (e.g., float values
that happened to be integers would be represented as integers). Now, constant
Kind depends on how the value was created, rather than its actual value. (The
reason why we cannot automatically "normalize" values to their smallest form
anymore is because floating-point numbers are not exact in general; and thus
normalization is often not possible in the first place, or would throw away
precision when it is not desired.) This has repercussions as to how constant
Values are used go/types and required corresponding adjustments.
Details of the changes:
go/constant package:
- use big.Rat and big.Float values to represent floating-point values
(internal change)
- changed semantic of Value.Kind accordingly
- String now returns a short, human-readable form of a value
(this leads to better error messages in go/types)
- added ToInt, ToFloat, and ToComplex conversion functions
- added ExactString to obtain an exact string form of a value
go/types:
- adjusted and simplified implementation of representableConst
- adjusted various places where Value.Kind was expected to be "smallest"
by calling the respective ToInt/Float/Complex conversion functions
- enabled 5 disabled tests in stdlib_test.go that now work
api checker:
- print all constant values in a short human-readable form (floats are
printed in floating-point form), but also print an exact form if it
is different from the short form
- adjusted test golden file and go.1.1.text reference file
Fixes#11327.
Change-Id: I492b704aae5b0238e5b7cee13e18ffce61193587
Reviewed-on: https://go-review.googlesource.com/17360
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Move tracing functions from runtime/pprof to the new runtime/trace package.
Fixes#9710
Change-Id: I718bcb2ae3e5959d9f72cab5e6708289e5c8ebd5
Reviewed-on: https://go-review.googlesource.com/12511
Reviewed-by: Russ Cox <rsc@golang.org>
In lieu of the more invasive https://go-review.googlesource.com/#/c/12373/ .
Change-Id: I0221783fcaa8af04520c80cd2993d7d542d2c431
Reviewed-on: https://go-review.googlesource.com/12486
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
