1 files changed, 67 insertions, 0 deletions
diff --git a/src/runtime/runtime.go b/src/runtime/runtime.go
new file mode 100644
index 0000000..2cf93ab
--- /dev/null
+++ b/src/runtime/runtime.go
@@ -0,0 +1,67 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import (
+	"runtime/internal/atomic"
+	_ "unsafe" // for go:linkname
+)
+
+//go:generate go run wincallback.go
+//go:generate go run mkduff.go
+//go:generate go run mkfastlog2table.go
+
+var ticks ticksType
+
+type ticksType struct {
+	lock mutex
+	pad  uint32 // ensure 8-byte alignment of val on 386
+	val  uint64
+}
+
+// Note: Called by runtime/pprof in addition to runtime code.
+func tickspersecond() int64 {
+	r := int64(atomic.Load64(&ticks.val))
+	if r != 0 {
+		return r
+	}
+	lock(&ticks.lock)
+	r = int64(ticks.val)
+	if r == 0 {
+		t0 := nanotime()
+		c0 := cputicks()
+		usleep(100 * 1000)
+		t1 := nanotime()
+		c1 := cputicks()
+		if t1 == t0 {
+			t1++
+		}
+		r = (c1 - c0) * 1000 * 1000 * 1000 / (t1 - t0)
+		if r == 0 {
+			r++
+		}
+		atomic.Store64(&ticks.val, uint64(r))
+	}
+	unlock(&ticks.lock)
+	return r
+}
+
+var envs []string
+var argslice []string
+
+//go:linkname syscall_runtime_envs syscall.runtime_envs
+func syscall_runtime_envs() []string { return append([]string{}, envs...) }
+
+//go:linkname syscall_Getpagesize syscall.Getpagesize
+func syscall_Getpagesize() int { return int(physPageSize) }
+
+//go:linkname os_runtime_args os.runtime_args
+func os_runtime_args() []string { return append([]string{}, argslice...) }
+
+//go:linkname syscall_Exit syscall.Exit
+//go:nosplit
+func syscall_Exit(code int) {
+	exit(int32(code))
+}