Network emulator interface: crash and debug output

[ThomasVolkert]

Sometimes the emulator interface gives the output "Given payload buffer is too small". This message is too short. It should include a hint about the desired and the provided buffer sizes. After such an error message, the program sometimes crashes inside memcpy() which is called by DoGetFoGPayload() from the JNI proxy.

[FlorianLiers]

Typical error message of a Linux Java VM:

Stack: [0x00007f67526b1000,0x00007f67527b2000], sp=0x00007f67527b0048, free space=1020k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libc.so.6+0x128f49] __memcpy_ssse3_back+0xb9
C [libEthernetJni.so+0x5a2e] Java_jniImports_PacketFoG_DoGetFoGPayload+0x57
J jniImports.PacketFoG.DoGetFoGPayload(I)[B

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J jniImports.PacketFoG.DoGetFoGPayload(I)[B
J de.tuilmenau.ics.fog.emulator.ethernet.InterfaceMAC.receive()Lde/tuilmenau/ics/fog/emulator/Interface$ReceiveResult;
j de.tuilmenau.ics.fog.emulator.Ethernet.receivedPacket()V+4
j de.tuilmenau.ics.fog.emulator.Ethernet.run()V+4
j java.lang.Thread.run()V+11
v ~StubRoutines::call_stub