runtime: reorganize memory code

Move code from malloc1.go, malloc2.go, mem.go, mgc0.go into appropriate locations. Factor mgc.go into mgc.go, mgcmark.go, mgcsweep.go, mstats.go. A lot of this code was in certain files because the right place was in a C file but it was written in Go, or vice versa. This is one step toward making things actually well-organized again. Change-Id: I6741deb88a7cfb1c17ffe0bcca3989e10207968f Reviewed-on: https://go-review.googlesource.com/5300 Reviewed-by: Austin Clements <[email protected]> Reviewed-by: Rick Hudson <[email protected]>
sololxy · Feb 19, 2015 · 484f801 · 484f801
1 parent d384545
commit 484f801
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diff --git a/src/runtime/heapdump.go b/src/runtime/heapdump.go
@@ -13,6 +13,24 @@ package runtime
 
 import "unsafe"
 
+//go:linkname runtime_debug_WriteHeapDump runtime/debug.WriteHeapDump
+func runtime_debug_WriteHeapDump(fd uintptr) {
+	semacquire(&worldsema, false)
+	gp := getg()
+	gp.m.preemptoff = "write heap dump"
+	systemstack(stoptheworld)
+
+	systemstack(func() {
+		writeheapdump_m(fd)
+	})
+
+	gp.m.preemptoff = ""
+	gp.m.locks++
+	semrelease(&worldsema)
+	systemstack(starttheworld)
+	gp.m.locks--
+}
+
 const (
 	fieldKindEol       = 0
 	fieldKindPtr       = 1