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libgo: update to Go 1.8 release candidate 1

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Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456
This commit is contained in:
Ian Lance Taylor 2017-01-14 00:05:42 +00:00 • committed by Ian Lance Taylor
parent 829afb8f05
commit c2047754c3
983 changed files with 69318 additions and 17662 deletions
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19
libgo/go/runtime/debug/garbage_test.go
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@ -80,7 +80,7 @@ func TestReadGCStats(t *testing.T) {
for i := 0; i < n; i++ {
dt := stats.PauseEnd[i]
if dt.UnixNano() != int64(mstats.PauseEnd[off]) {
t.Errorf("stats.PauseEnd[%d] = %d, want %d", i, dt, mstats.PauseEnd[off])
t.Errorf("stats.PauseEnd[%d] = %d, want %d", i, dt.UnixNano(), mstats.PauseEnd[off])
}
off = (off + len(mstats.PauseEnd) - 1) % len(mstats.PauseEnd)
}
@ -89,10 +89,6 @@ func TestReadGCStats(t *testing.T) {
var big = make([]byte, 1<<20)
func TestFreeOSMemory(t *testing.T) {
if runtime.GOARCH == "arm64" || runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" || runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le" ||
runtime.GOOS == "nacl" {
t.Skip("issue 9993; scavenger temporarily disabled on systems with physical pages larger than logical pages")
}
var ms1, ms2 runtime.MemStats
if big == nil {
@ -118,3 +114,16 @@ func TestSetGCPercent(t *testing.T) {
t.Errorf("SetGCPercent(123); SetGCPercent(x) = %d, want 123", new)
}
}
func TestSetMaxThreadsOvf(t *testing.T) {
// Verify that a big threads count will not overflow the int32
// maxmcount variable, causing a panic (see Issue 16076).
//
// This can only happen when ints are 64 bits, since on platforms
// with 32 bit ints SetMaxThreads (which takes an int parameter)
// cannot be given anything that will overflow an int32.
//
// Call SetMaxThreads with 1<<31, but only on 64 bit systems.
nt := SetMaxThreads(1 << (30 + ^uint(0)>>63))
SetMaxThreads(nt) // restore previous value
}