Re: [libvirt] [libvirt-java] [PATCH 11/65] Use virFree in order to release memory acquired from libvirt

When JNA is linked to a different runtime library than libvirt, using JNA's Native.free will probably lead to crashes as witnessed on Windows: # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000077363290, pid=10180, tid=9908 # # JRE version: 7.0_25-b16 # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 mixed mode windows-amd64 compressed oops) # Problematic frame: # C [ntdll.dll+0x53290] RtlFreeHeap+0xd0 The root cause is that the libvirt DLL uses MSVCRT as its runtime library, whereas the jnidispatch DLL of JNA uses a different one. At runtime, when calling org.sun.com.jna.Native.free() the OS function RtlFreeHeap is called with an invalid Pointer that was actually allocated by MSVCRT's malloc. Basically, we cannot simply mix and match memory allocation functions from different runtime libraries, but have to call virFree for pointers orignating from libvirt itself. So, this patch re-adds and uses the virFree method which had been removed in commit 3220de292990bed71828fba2f3700bc846d440f2. Signed-off-by: Claudio Bley <cbley(a)av-test.de&gt; --- src/main/java/org/libvirt/Library.java | 4 ++-- src/main/java/org/libvirt/jna/Libvirt.java | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-)