Tools: Debugging Native and Java Code with WDB

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Tools for

Debugging

gdb

Start the Java Process (no program)

(gdb) r

Starting program: /opt/java1.3/bin/PA_RISC2.0/native_threads/java

(no debugging symbols found)...(no debugging symbols found)…( …

Program received signal SIGSEGV, Segmentation fault.

0x6f8e69f0 in os_init_2 () from /opt/java1.3/jre/lib/PA_RISC2.0/server/libjvm.sl

(gdb)

• The SIGSEGV signal is normal part of Java Virtual Machine initialization

• Do a back trace

• Continue

• To not stop or print signals permanently use a ~/.gdbinit file with contents:

handle SIGFPE nostop noprint pass

• Can also do the same for SIGSEGV and SIGBUS, if desired