git: openjdk/jdk11u-dev: 8267666: Add option to jcmd GC.heap_dump to use existing file

[Christoph Langer]

Changeset: 67622161
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2021-07-23 13:16:10 +0000
URL:       https://git.openjdk.java.net/jdk11u-dev/commit/6762216121699e1b8234cced6cd6410b5de92c09

8267666: Add option to jcmd GC.heap_dump to use existing file

Reviewed-by: rschmelter, goetz, stuefe
Backport-of: 7cbb67a3f8adc83a5b51c092a66480d7b22a6bea

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/share/services/diagnosticCommand.cpp
! src/hotspot/share/services/diagnosticCommand.hpp
! src/hotspot/share/services/heapDumper.cpp
! src/hotspot/share/services/heapDumper.hpp
! test/hotspot/jtreg/serviceability/dcmd/gc/HeapDumpTest.java