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[dev.boringcrypto] all: merge master into dev.boringcrypto
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Change-Id: Iba19903f0565b11c648e1fa6effc07b8f97dc322
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@rolandshoemaker
rolandshoemaker committed Nov 18, 2020
2 parents 95ceba1 + 01cdd36 commit 906d6e3
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228 changes: 136 additions & 92 deletions api/except.txt
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443 changes: 438 additions & 5 deletions api/next.txt
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10 changes: 9 additions & 1 deletion doc/contribute.html
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Expand Up @@ -947,10 +947,18 @@ <h3 id="votes">Voting conventions</h3>
</li>
</ul>

<p>
At least two maintainers must approve of the change, and at least one
of those maintainers must +2 the change.
The second maintainer may cast a vote of Trust+1, meaning that the
change looks basically OK, but that the maintainer hasn't done the
detailed review required for a +2 vote.
</p>

<h3 id="submit">Submitting an approved change</h3>

<p>
After the code has been +2'ed, an approver will
After the code has been +2'ed and Trust+1'ed, an approver will
apply it to the master branch using the Gerrit user interface.
This is called "submitting the change".
</p>
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141 changes: 131 additions & 10 deletions doc/go1.16.html
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Expand Up @@ -71,6 +71,16 @@ <h4 id="modules">Modules</h4>
TODO: write and link to blog post
</p>

<p><!-- golang.org/issue/40276 -->
<code>go</code> <code>install</code>, with or without a version suffix (as
described above), is now the recommended way to build and install packages in
module mode. <code>go</code> <code>get</code> should be used with the
<code>-d</code> flag to adjust the current module's dependencies without
building packages, and use of <code>go</code> <code>get</code> to build and
install packages is deprecated. In a future release, the <code>-d</code> flag
will always be enabled.
</p>

<p><!-- golang.org/issue/24031 -->
<code>retract</code> directives may now be used in a <code>go.mod</code> file
to indicate that certain published versions of the module should not be used
Expand Down Expand Up @@ -110,6 +120,16 @@ <h4 id="go-test"><code>go</code> <code>test</code></h4>
See <code>go</code> <code>help</code> <code>environment</code> for details.
</p>

<h4 id="go-get"><code>go</code> <code>get</code></h4>

<p><!-- golang.org/cl/263267 -->
<code>go</code> <code>get</code> <code>example.com/mod@patch</code> now
requires that some version of <code>example.com/mod</code> already be
required by the main module.
(However, <code>go</code> <code>get</code> <code>-u=patch</code> continues
to patch even newly-added dependencies.)
</p>

<h4 id="all-pattern">The <code>all</code> pattern</h4>

<p><!-- golang.org/cl/240623 -->
Expand All @@ -122,6 +142,37 @@ <h4 id="all-pattern">The <code>all</code> pattern</h4>
by <code>go</code> <code>mod</code> <code>vendor</code> since Go 1.11.
</p>

<h4 id="toolexec">The <code>-toolexec</code> build flag</h4>

<p><!-- golang.org/cl/263357 -->
When the <code>-toolexec</code> build flag is specified to use a program when
invoking toolchain programs like compile or asm, the environment variable
<code>TOOLEXEC_IMPORTPATH</code> is now set to the import path of the package
being built.
</p>

<h4 id="i-flag">The <code>-i</code> build flag</h4>

<p><!-- golang.org/issue/41696 -->
The <code>-i</code> flag accepted by <code>go</code> <code>build</code>,
<code>go</code> <code>install</code>, and <code>go</code> <code>test</code> is
now deprecated. The <code>-i</code> flag instructs the <code>go</code> command
to install packages imported by packages named on the command line. Since
the build cache was introduced in Go 1.10, the <code>-i</code> flag no longer
has a significant effect on build times, and it causes errors when the install
directory is not writable.
</p>

<h4 id="list-buildid">The <code>list</code> command</h4>

<p><!-- golang.org/cl/263542 -->
When the <code>-export</code> flag is specified, the <code>BuildID</code>
field is now set to the build ID of the compiled package. This is equivalent
to running <code>go</code> <code>tool</code> <code>buildid</code> on
<code>go</code> <code>list</code> <code>-exported</code> <code>-f</code> <code>{{.Export}</code>,
but without the extra step.
</p>

<h3 id="cgo">Cgo</h3>

<p> <!-- CL 252378 -->
Expand All @@ -142,6 +193,18 @@ <h2 id="runtime">Runtime</h2>
TODO
</p>

<p><!-- CL 267100 -->
On Linux, the runtime now defaults to releasing memory to the
operating system promptly (using <code>MADV_DONTNEED</code>), rather
than lazily when the operating system is under memory pressure
(using <code>MADV_FREE</code>). This means process-level memory
statistics like RSS will more accurately reflect the amount of
physical memory being used by Go processes. Systems that are
currently using <code>GODEBUG=madvdontneed=1</code> to improve
memory monitoring behavior no longer need to set this environment
variable.
</p>

<h2 id="compiler">Compiler</h2>

<p>
Expand Down Expand Up @@ -173,7 +236,10 @@ <h2 id="linker">Linker</h2>
TODO: update with final numbers later in the release.
</p>

<!-- CL 255259: https://golang.org/cl/255259: cmd/link: enable ASLR on windows binaries built with -buildmode=c-shared -->
<p> <!-- CL 255259 -->
On Windows, <code>go build -buildmode=c-shared</code> now generates Windows
ASLR DLLs by default. ASLR can be disabled with <code>--ldflags=-aslr=false</code>.
</p>

<h2 id="library">Core library</h2>

Expand All @@ -193,12 +259,33 @@ <h3 id="crypto/tls"><a href="/pkg/crypto/tls">crypto/tls</a></h3>

<p><!-- CL 256897 -->
I/O operations on closing or closed TLS connections can now be detected using
the new <a href="/pkg/net/#ErrClosed">ErrClosed</a> error. A typical use
would be <code>errors.Is(err, net.ErrClosed)</code>. In earlier releases
the new <a href="/pkg/net/#ErrClosed">ErrClosed</a> error. A typical use
would be <code>errors.Is(err, net.ErrClosed)</code>. In earlier releases
the only way to reliably detect this case was to match the string returned
by the <code>Error</code> method with <code>"tls: use of closed connection"</code>.
</p>

<p><!-- CL 266037 -->
A default deadline is set in <a href="/pkg/crypto/tls/#Conn.Close">Close</a>
before sending the close notify alert, in order to prevent blocking
indefinitely.
</p>

<p><!-- CL 246338 -->
<a href="/pkg/crypto/tls#Conn.HandshakeContext">(*Conn).HandshakeContext</a> was added to
allow the user to control cancellation of an in-progress TLS Handshake.
The context provided is propagated into the
<a href="/pkg/crypto/tls#ClientHelloInfo">ClientHelloInfo</a>
and <a href="/pkg/crypto/tls#CertificateRequestInfo">CertificateRequestInfo</a>
structs and accessible through the new
<a href="/pkg/crypto/tls#ClientHelloInfo.Context">(*ClientHelloInfo).Context</a>
and
<a href="/pkg/crypto/tls#CertificateRequestInfo.Context">
(*CertificateRequestInfo).Context
</a> methods respectively. Canceling the context after the handshake has finished
has no effect.
</p>

<h3 id="crypto/x509"><a href="/pkg/crypto/x509">crypto/x509</a></h3>

<p><!-- CL 235078 -->
Expand All @@ -216,6 +303,14 @@ <h3 id="crypto/x509"><a href="/pkg/crypto/x509">crypto/x509</a></h3>
of a malformed certificate.
</p>

<h3 id="encoding/json"><a href="/pkg/encoding/json">encoding/json</a></h3>

<p><!-- CL 263619 -->
The error message for
<a href="/pkg/encoding/json/#SyntaxError">SyntaxError</a>
now begins with "json: ", matching the other errors in the package.
</p>

<h3 id="net"><a href="/pkg/net/">net</a></h3>

<p><!-- CL 250357 -->
Expand All @@ -228,13 +323,10 @@ <h3 id="net"><a href="/pkg/net/">net</a></h3>
with <code>"use of closed network connection"</code>.
</p>

<h3 id="reflect"><a href="/pkg/reflect/">reflect</a></h3>

<p><!-- CL 259237, golang.org/issue/22075 -->
For interface types and values, <a href="/pkg/reflect/#Value.Method">Method</a>,
<a href="/pkg/reflect/#Value.MethodByName">MethodByName</a>, and
<a href="/pkg/reflect/#Value.NumMethod">NumMethod</a> now
operate on the interface's exported method set, rather than its full method set.
<p><!-- CL 255898 -->
In previous Go releases the default TCP listener backlog size on Linux systems,
set by <code>/proc/sys/net/core/somaxconn</code>, was limited to a maximum of <code>65535</code>.
On Linux kernel version 4.1 and above, the maximum is now <code>4294967295</code>.
</p>

<h3 id="text/template/parse"><a href="/pkg/text/template/parse/">text/template/parse</a></h3>
Expand Down Expand Up @@ -288,6 +380,20 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
</dd>
</dl><!-- crypto/x509 -->

<dl id="encoding/xml"><dt><a href="/pkg/encoding/xml/">encoding/xml</a></dt>
<dd>
<p><!-- CL 264024 -->
The encoder has always taken care to avoid using namespace prefixes
beginning with <code>xml</code>, which are reserved by the XML
specification.
Now, following the specification more closely, that check is
case-insensitive, so that prefixes beginning
with <code>XML</code>, <code>XmL</code>, and so on are also
avoided.
</p>
</dd>
</dl><!-- encoding/xml -->

<dl id="net/http"><dt><a href="/pkg/net/http/">net/http</a></dt>
<dd>
<p><!-- CL 233637 -->
Expand All @@ -314,6 +420,13 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
Cookies set with <code>SameSiteDefaultMode</code> now behave according to the current
spec (no attribute is set) instead of generating a SameSite key without a value.
</p>

<p><!-- CL 246338 -->
The <a href="/pkg/net/http/"><code>net/http</code></a> package now uses the new
<a href="/pkg/crypto/tls#Conn.HandshakeContext"><code>(*tls.Conn).HandshakeContext</code></a>
with the <a href="/pkg/net/http/#Request"><code>Request</code></a> context
when performing TLS handshakes in the client or server.
</p>
</dd>
</dl><!-- net/http -->

Expand All @@ -325,6 +438,14 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
</dd>
</dl><!-- runtime/debug -->

<dl id="syscall"><dt><a href="/pkg/syscall/">syscall</a></dt>
<dd>
<p><!-- CL 261917 -->
<a href="/pkg/syscall/#SysProcAttr"><code>SysProcAttr</code></a> on Windows has a new NoInheritHandles field that disables inheriting handles when creating a new process.
</p>
</dd>
</dl><!-- syscall -->

<dl id="strconv"><dt><a href="/pkg/strconv/">strconv</a></dt>
<dd>
<p><!-- CL 260858 -->
Expand Down
42 changes: 26 additions & 16 deletions doc/go_spec.html
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@@ -1,6 +1,6 @@
<!--{
"Title": "The Go Programming Language Specification",
"Subtitle": "Version of Sep 24, 2020",
"Subtitle": "Version of Oct 7, 2020",
"Path": "/ref/spec"
}-->

Expand Down Expand Up @@ -3594,23 +3594,33 @@ <h3 id="Operators">Operators</h3>
</p>

<pre>
var a [1024]byte
var s uint = 33
var i = 1&lt;&lt;s // 1 has type int
var j int32 = 1&lt;&lt;s // 1 has type int32; j == 0
var k = uint64(1&lt;&lt;s) // 1 has type uint64; k == 1&lt;&lt;33
var m int = 1.0&lt;&lt;s // 1.0 has type int; m == 0 if ints are 32bits in size
var n = 1.0&lt;&lt;s == j // 1.0 has type int32; n == true
var o = 1&lt;&lt;s == 2&lt;&lt;s // 1 and 2 have type int; o == true if ints are 32bits in size
var p = 1&lt;&lt;s == 1&lt;&lt;33 // illegal if ints are 32bits in size: 1 has type int, but 1&lt;&lt;33 overflows int
var u = 1.0&lt;&lt;s // illegal: 1.0 has type float64, cannot shift
var u1 = 1.0&lt;&lt;s != 0 // illegal: 1.0 has type float64, cannot shift
var u2 = 1&lt;&lt;s != 1.0 // illegal: 1 has type float64, cannot shift
var v float32 = 1&lt;&lt;s // illegal: 1 has type float32, cannot shift
var w int64 = 1.0&lt;&lt;33 // 1.0&lt;&lt;33 is a constant shift expression
var x = a[1.0&lt;&lt;s] // 1.0 has type int; x == a[0] if ints are 32bits in size
var a = make([]byte, 1.0&lt;&lt;s) // 1.0 has type int; len(a) == 0 if ints are 32bits in size
</pre>

// The results of the following examples are given for 64-bit ints.
var i = 1&lt;&lt;s // 1 has type int
var j int32 = 1&lt;&lt;s // 1 has type int32; j == 0
var k = uint64(1&lt;&lt;s) // 1 has type uint64; k == 1&lt;&lt;33
var m int = 1.0&lt;&lt;s // 1.0 has type int; m == 1&lt;&lt;33
var n = 1.0&lt;&lt;s == j // 1.0 has type int; n == true
var o = 1&lt;&lt;s == 2&lt;&lt;s // 1 and 2 have type int; o == false
var p = 1&lt;&lt;s == 1&lt;&lt;33 // 1 has type int; p == true
var u = 1.0&lt;&lt;s // illegal: 1.0 has type float64, cannot shift
var u1 = 1.0&lt;&lt;s != 0 // illegal: 1.0 has type float64, cannot shift
var u2 = 1&lt;&lt;s != 1.0 // illegal: 1 has type float64, cannot shift
var v float32 = 1&lt;&lt;s // illegal: 1 has type float32, cannot shift
var w int64 = 1.0&lt;&lt;33 // 1.0&lt;&lt;33 is a constant shift expression; w == 1&lt;&lt;33
var x = a[1.0&lt;&lt;s] // panics: 1.0 has type int, but 1&lt;&lt;33 overflows array bounds
var b = make([]byte, 1.0&lt;&lt;s) // 1.0 has type int; len(b) == 1&lt;&lt;33

// The results of the following examples are given for 32-bit ints,
// which means the shifts will overflow.
var mm int = 1.0&lt;&lt;s // 1.0 has type int; mm == 0
var oo = 1&lt;&lt;s == 2&lt;&lt;s // 1 and 2 have type int; oo == true
var pp = 1&lt;&lt;s == 1&lt;&lt;33 // illegal: 1 has type int, but 1&lt;&lt;33 overflows int
var xx = a[1.0&lt;&lt;s] // 1.0 has type int; xx == a[0]
var bb = make([]byte, 1.0&lt;&lt;s) // 1.0 has type int; len(bb) == 0
</pre>

<h4 id="Operator_precedence">Operator precedence</h4>
<p>
Expand Down
4 changes: 2 additions & 2 deletions lib/time/update.bash
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Expand Up @@ -8,8 +8,8 @@
# Consult https://www.iana.org/time-zones for the latest versions.

# Versions to use.
CODE=2020b
DATA=2020b
CODE=2020d
DATA=2020d

set -e
rm -rf work
Expand Down
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2 changes: 1 addition & 1 deletion misc/cgo/test/callback.go
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Expand Up @@ -181,7 +181,7 @@ func testCallbackCallers(t *testing.T) {
name := []string{
"runtime.cgocallbackg1",
"runtime.cgocallbackg",
"runtime.cgocallback_gofunc",
"runtime.cgocallback",
"runtime.asmcgocall",
"runtime.cgocall",
"test._Cfunc_callback",
Expand Down
1 change: 1 addition & 0 deletions misc/cgo/test/cgo_linux_test.go
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Expand Up @@ -15,5 +15,6 @@ func TestSetgid(t *testing.T) {
}
testSetgid(t)
}
func Test1435(t *testing.T) { test1435(t) }
func Test6997(t *testing.T) { test6997(t) }
func TestBuildID(t *testing.T) { testBuildID(t) }
2 changes: 2 additions & 0 deletions misc/cgo/test/cgo_test.go
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Expand Up @@ -76,6 +76,8 @@ func TestCheckConst(t *testing.T) { testCheckConst(t) }
func TestConst(t *testing.T) { testConst(t) }
func TestCthread(t *testing.T) { testCthread(t) }
func TestEnum(t *testing.T) { testEnum(t) }
func TestNamedEnum(t *testing.T) { testNamedEnum(t) }
func TestCastToEnum(t *testing.T) { testCastToEnum(t) }
func TestErrno(t *testing.T) { testErrno(t) }
func TestFpVar(t *testing.T) { testFpVar(t) }
func TestHelpers(t *testing.T) { testHelpers(t) }
Expand Down

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