[release-branch.go1.17] go1.17

Change-Id: Ie59feb7f043574c7db4c7f14184603442638e4c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/342470
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

VERSION

@@ -0,0 +1 @@
+go1.17

codereview.cfg

@@ -1 +1,2 @@
-branch: master
+branch: release-branch.go1.17
+parent-branch: master

doc/go1.17.html

@@ -753,9 +753,9 @@ func Foo() bool {
 
     <p><!-- CL 311572 -->
       The new
-      <a href="/pkg/database/sql/#NullInt16"><code>NullInt16</code></a> 
-      and 
-      <a href="/pkg/database/sql/#NullByte"><code>NullByte</code></a> 
+      <a href="/pkg/database/sql/#NullInt16"><code>NullInt16</code></a>
+      and
+      <a href="/pkg/database/sql/#NullByte"><code>NullByte</code></a>
       structs represent the int16 and byte values that may be null. These can be used as
       destinations of the <a href="/pkg/database/sql/#Scan"><code>Scan</code></a> method,
       similar to NullString.
@@ -1205,11 +1205,11 @@ func Foo() bool {
 
     <p><!-- CL 300996 -->
       The package now accepts comma "," as a separator for fractional seconds when parsing and formatting time.
-      The following time formats are now accepted:
+      For example, the following time layouts are now accepted:
       <ul>
-        <li>2006-01-02 14:06:03,999999999 -0700 MST</li>
-        <li>Mon Jan _2 14:06:03,120007 2006</li>
-        <li>Mon Jan 2 14:06:03,120007 2006</li>
+        <li>2006-01-02 15:04:05,999999999 -0700 MST</li>
+        <li>Mon Jan _2 15:04:05,000000 2006</li>
+        <li>Monday, January 2 15:04:05,000 2006</li>
       </ul>
     </p>
 

src/runtime/proc.go

@@ -4686,7 +4686,7 @@ func sigprof(pc, sp, lr uintptr, gp *g, mp *m) {
 		return
 	}
 
-	// On mips{,le}, 64bit atomics are emulated with spinlocks, in
+	// On mips{,le}/arm, 64bit atomics are emulated with spinlocks, in
 	// runtime/internal/atomic. If SIGPROF arrives while the program is inside
 	// the critical section, it creates a deadlock (when writing the sample).
 	// As a workaround, create a counter of SIGPROFs while in critical section
@@ -4699,6 +4699,13 @@ func sigprof(pc, sp, lr uintptr, gp *g, mp *m) {
 				return
 			}
 		}
+		if GOARCH == "arm" && goarm < 7 && GOOS == "linux" && pc&0xffff0000 == 0xffff0000 {
+			// runtime/internal/atomic functions call into kernel
+			// helpers on arm < 7. See
+			// runtime/internal/atomic/sys_linux_arm.s.
+			cpuprof.lostAtomic++
+			return
+		}
 	}
 
 	// Profiling runs concurrently with GC, so it must not allocate.

src/sync/atomic/value.go

@@ -126,7 +126,7 @@ func (v *Value) Swap(new interface{}) (old interface{}) {
 	}
 }
 
-// CompareAndSwapPointer executes the compare-and-swap operation for the Value.
+// CompareAndSwap executes the compare-and-swap operation for the Value.
 //
 // All calls to CompareAndSwap for a given Value must use values of the same
 // concrete type. CompareAndSwap of an inconsistent type panics, as does

src/time/format.go

@@ -77,9 +77,9 @@ import "errors"
 // The formats  and 002 are space-padded and zero-padded
 // three-character day of year; there is no unpadded day of year format.
 //
-// A decimal point followed by one or more zeros represents a fractional
-// second, printed to the given number of decimal places.
-// Either a comma or decimal point followed by one or more nines represents
+// A comma or decimal point followed by one or more zeros represents
+// a fractional second, printed to the given number of decimal places.
+// A comma or decimal point followed by one or more nines represents
 // a fractional second, printed to the given number of decimal places, with
 // trailing zeros removed.
 // For example "15:04:05,000" or "15:04:05.000" formats or parses with