r249590 - in /trunk: gcc/go/gofrontend/MERGE li...

[ian at gcc dot gnu dot org]

Author: ian
Date: Fri Jun 23 13:45:36 2017
New Revision: 249590

URL: https://gcc.gnu.org/viewcvs?rev=249590&root=gcc&view=rev
Log:
    runtime: improve handling of panic during deferred function
    
    When a panic occurs while processing a deferred function that
    recovered an earlier panic, we shouldn't report the recovered panic
    in the panic stack trace. Stop doing so by keeping track of the panic
    that triggered a defer, marking it as aborted if we see the defer again,
    and discarding aborted panics when a panic is recovered. This is what
    the gc runtime does.
    
    The test for this is TestRecursivePanic in runtime/crash_test.go.
    We don't run that test yet, but we will soon.
    
    Reviewed-on: https://go-review.googlesource.com/46461

Modified:
    trunk/gcc/go/gofrontend/MERGE
    trunk/libgo/go/runtime/panic.go
    trunk/libgo/go/runtime/runtime2.go