---

yaml
---
r: 8180
b: refs/heads/snap-stage3
c: 8ad9cf8
h: refs/heads/master
v: v3

Author: brson

[refs]

@@ -1,6 +1,6 @@
 ---
 refs/heads/master: 2898dcc5d97da9427ac367542382b6239d9c0bbf
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: 5d2442d89cbfbba03545a877b7768fe2ac34ef82
+refs/heads/snap-stage3: 8ad9cf8087f2d1f1badfb7c8616c0b11cc4aa6db
 refs/heads/try: 2898dcc5d97da9427ac367542382b6239d9c0bbf
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105

branches/snap-stage3/src/rt/rust_task.cpp

@@ -732,6 +732,11 @@ rust_task::config_notify(chan_handle chan) {
     notify_chan = chan;
 }
 
+// This is the function that switches stacks by calling another function with
+// a single void* argument while changing the stack pointer. It has a funny
+// name because gdb doesn't normally like to backtrace through split stacks
+// (thinks it indicates a bug), but has a special case to allow functions
+// named __morestack to move the stack pointer around.
 extern "C" void __morestack(void *args, void *fn_ptr, uintptr_t stack_ptr);
 
 static uintptr_t