runtime: check explicitly for short unwinding of stacks
Right now we find out implicitly if stack barriers are in place,
or defers. This change makes sure we find out about short
unwinds always.
Change-Id: Ibdde1ba9c79eb792660dcb7aa6f186e4e4d559b3
Reviewed-on: https://go-review.googlesource.com/13966
Reviewed-by: Austin Clements <austin@google.com>
diff --git a/src/runtime/traceback.go b/src/runtime/traceback.go
index 48ef6e5..1025032 100644
--- a/src/runtime/traceback.go
+++ b/src/runtime/traceback.go
@@ -479,6 +479,12 @@
throw("traceback has leftover stack barriers")
}
+ if callback != nil && n < max && frame.sp != gp.stktopsp {
+ print("runtime: g", gp.goid, ": frame.sp=", hex(frame.sp), " top=", hex(gp.stktopsp), "\n")
+ print("\tstack=[", hex(gp.stack.lo), "-", hex(gp.stack.hi), "] n=", n, " max=", max, "\n")
+ throw("traceback did not unwind completely")
+ }
+
return n
}
