runtime: split non-debugging malloc interface out of debug.go into mem.go

R=r, dsymonds
CC=golang-dev
https://golang.org/cl/4273045

src/pkg/runtime/Makefile

@@ -22,6 +22,7 @@ GOFILES=\
 	debug.go\
 	error.go\
 	extern.go\
+	mem.go\
 	sig.go\
 	softfloat64.go\
 	type.go\

src/pkg/runtime/debug.go

@@ -4,8 +4,6 @@
 
 package runtime
 
-import "unsafe"
-
 // Breakpoint() executes a breakpoint trap.
 func Breakpoint()
 
@@ -31,65 +29,6 @@ func Cgocalls() int64
 // Goroutines returns the number of goroutines that currently exist.
 func Goroutines() int32
 
-type MemStatsType struct {
-	// General statistics.
-	// Not locked during update; approximate.
-	Alloc      uint64 // bytes allocated and still in use
-	TotalAlloc uint64 // bytes allocated (even if freed)
-	Sys        uint64 // bytes obtained from system (should be sum of XxxSys below)
-	Lookups    uint64 // number of pointer lookups
-	Mallocs    uint64 // number of mallocs
-	Frees      uint64 // number of frees
-
-	// Main allocation heap statistics.
-	HeapAlloc   uint64 // bytes allocated and still in use
-	HeapSys     uint64 // bytes obtained from system
-	HeapIdle    uint64 // bytes in idle spans
-	HeapInuse   uint64 // bytes in non-idle span
-	HeapObjects uint64 // total number of allocated objects
-
-	// Low-level fixed-size structure allocator statistics.
-	//	Inuse is bytes used now.
-	//	Sys is bytes obtained from system.
-	StackInuse  uint64 // bootstrap stacks
-	StackSys    uint64
-	MSpanInuse  uint64 // mspan structures
-	MSpanSys    uint64
-	MCacheInuse uint64 // mcache structures
-	MCacheSys   uint64
-	BuckHashSys uint64 // profiling bucket hash table
-
-	// Garbage collector statistics.
-	NextGC       uint64
-	PauseTotalNs uint64
-	PauseNs      [256]uint64 // most recent GC pause times
-	NumGC        uint32
-	EnableGC     bool
-	DebugGC      bool
-
-	// Per-size allocation statistics.
-	// Not locked during update; approximate.
-	// 61 is NumSizeClasses in the C code.
-	BySize [61]struct {
-		Size    uint32
-		Mallocs uint64
-		Frees   uint64
-	}
-}
-
-var sizeof_C_MStats int // filled in by malloc.goc
-
-func init() {
-	if sizeof_C_MStats != unsafe.Sizeof(MemStats) {
-		println(sizeof_C_MStats, unsafe.Sizeof(MemStats))
-		panic("MStats vs MemStatsType size mismatch")
-	}
-}
-
-// MemStats holds statistics about the memory system.
-// The statistics are only approximate, as they are not interlocked on update.
-var MemStats MemStatsType
-
 // Alloc allocates a block of the given size.
 // FOR TESTING AND DEBUGGING ONLY.
 func Alloc(uintptr) *byte
@@ -102,9 +41,6 @@ func Free(*byte)
 // FOR TESTING AND DEBUGGING ONLY.
 func Lookup(*byte) (*byte, uintptr)
 
-// GC runs a garbage collection.
-func GC()
-
 // MemProfileRate controls the fraction of memory allocations
 // that are recorded and reported in the memory profile.
 // The profiler aims to sample an average of

src/pkg/runtime/mem.go

@@ -0,0 +1,69 @@
+// 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 "unsafe"
+
+type MemStatsType struct {
+	// General statistics.
+	// Not locked during update; approximate.
+	Alloc      uint64 // bytes allocated and still in use
+	TotalAlloc uint64 // bytes allocated (even if freed)
+	Sys        uint64 // bytes obtained from system (should be sum of XxxSys below)
+	Lookups    uint64 // number of pointer lookups
+	Mallocs    uint64 // number of mallocs
+	Frees      uint64 // number of frees
+
+	// Main allocation heap statistics.
+	HeapAlloc   uint64 // bytes allocated and still in use
+	HeapSys     uint64 // bytes obtained from system
+	HeapIdle    uint64 // bytes in idle spans
+	HeapInuse   uint64 // bytes in non-idle span
+	HeapObjects uint64 // total number of allocated objects
+
+	// Low-level fixed-size structure allocator statistics.
+	//	Inuse is bytes used now.
+	//	Sys is bytes obtained from system.
+	StackInuse  uint64 // bootstrap stacks
+	StackSys    uint64
+	MSpanInuse  uint64 // mspan structures
+	MSpanSys    uint64
+	MCacheInuse uint64 // mcache structures
+	MCacheSys   uint64
+	BuckHashSys uint64 // profiling bucket hash table
+
+	// Garbage collector statistics.
+	NextGC       uint64
+	PauseTotalNs uint64
+	PauseNs      [256]uint64 // most recent GC pause times
+	NumGC        uint32
+	EnableGC     bool
+	DebugGC      bool
+
+	// Per-size allocation statistics.
+	// Not locked during update; approximate.
+	// 61 is NumSizeClasses in the C code.
+	BySize [61]struct {
+		Size    uint32
+		Mallocs uint64
+		Frees   uint64
+	}
+}
+
+var sizeof_C_MStats int // filled in by malloc.goc
+
+func init() {
+	if sizeof_C_MStats != unsafe.Sizeof(MemStats) {
+		println(sizeof_C_MStats, unsafe.Sizeof(MemStats))
+		panic("MStats vs MemStatsType size mismatch")
+	}
+}
+
+// MemStats holds statistics about the memory system.
+// The statistics are only approximate, as they are not interlocked on update.
+var MemStats MemStatsType
+
+// GC runs a garbage collection.
+func GC()