hg: jdk/sandbox: 8219650: [Testbug] Fix potential crashes in new test hotspot gtest "test_print_hex_dump"

[chris.hegarty at oracle.com]

Changeset: 21ea4076a275
Author:    stuefe
Date:      2019-02-28 14:22 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/21ea4076a275

8219650: [Testbug] Fix potential crashes in new test hotspot gtest "test_print_hex_dump"
Reviewed-by: clanger, shade

! src/hotspot/share/runtime/os.cpp
! test/hotspot/gtest/runtime/test_os.cpp