On Linux, any java -Xcheck:jni command started from a non-interactive shell will print the warning "Warning: SIGINT handler expected:libjvm.so+0x3116e0 found:0x00000001".

sbohne/nova2.East.Sun.COM> sh -c "java -showversion -Xcheck:jni -jar /usr/sbohne/jdk7-b09/demo/jfc/Java2D/Java2Demo.jar &"
sbohne/nova2.East.Sun.COM> java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b09)
Java HotSpot(TM) Client VM (build 1.7.0-ea-b09, mixed mode, sharing)

Warning: SIGINT handler expected:libjvm.so+0x3116e0 found:0x00000001
Signal Handlers:
SIGSEGV: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGBUS: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGFPE: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGPIPE: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGXFSZ: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGILL: [libjvm.so+0x30f900], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGUSR2: [libjvm.so+0x311940], sa_mask[0]=0x00000000, sa_flags=0x10000004
SIGHUP: [libjvm.so+0x3116e0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGINT: SIG_IGN, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGTERM: [libjvm.so+0x3116e0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGQUIT: [libjvm.so+0x3116e0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004

sbohne/nova2.East.Sun.COM> uname -a
Linux nova2.East.Sun.COM 2.6.18-1.2798.fc6xen #1 SMP Mon Oct 16 15:11:19 EDT 2006 i686 athlon i386 GNU/Linux
sbohne/nova2.East.Sun.COM> cat /etc/*release*
Fedora Core release 6 (Zod)