ogle/probe: update linux/amd64 magic arena_foo_offset constants.
They were determined by inserting into pkg/runtime:
runtime·printf("arena_start_offset=%d\n",
(uint64)(&runtime·mheap.arena_start) - (uint64)(&runtime·mheap));
$ go version
go version devel +72ef9cff4fa9 Mon Feb 10 20:27:31 2014 -0500 linux/amd64
LGTM=r
R=r
https://golang.org/cl/61520046
diff --git a/probe/probe_linux_amd64.s b/probe/probe_linux_amd64.s
index f373f8c..9922332 100644
--- a/probe/probe_linux_amd64.s
+++ b/probe/probe_linux_amd64.s
@@ -40,9 +40,9 @@
// These are offsets of critical fields of runtime.mheap.
// TODO: Very susceptible to change! They (or something equivalent) need to be published by runtime.
-#define arena_start_offset 28840
-#define arena_used_offset 28848
-#define arena_end_offset 28856
+#define arena_start_offset 14504
+#define arena_used_offset 14512
+#define arena_end_offset 14520
// start of heap.
TEXT ·heapStart(SB), NOSPLIT, $0
