Debugging with GDB Manual HP WDB v6.3 (5900-2180, August 2012)

systems is shown following. The examples are for SDK 1.4; if you are using JDK 1.5, substitute
/opt/java1.5 for /opt/java1.4.
• For 32 bit IPF applications,
export GDB_JAVA_UNWINDLIB = /opt/java1.4/jre/lib/IA64N/server/libjunwind.so
• For 64 bit IPF applications,
export GDB_JAVA_UNWINDLIB = /opt/java1.4/jre/lib/IA64W/server/libjunwind.so
• For 32 bit PA applications,
export GDB_JAVA_UNWINDLIB = /opt/java1.4/jre/lib/PA_RISC/server/libjunwind.sl
• For 64-bit PA applications,
export GDB_JAVA_UNWINDLIB = /opt/java1.4/jre/lib/PA_RISC2.0/server/libjunwind.sl
export GDB_JAVA_UNWINDLIB = /opt/java1.4/jre/lib/PA_RISC2.0W/server/libjunwind.sl
If the SDK is installed in a location other than the default, substitute the non-default location for
/opt/java1.4 in the previous commands.
14.26.1.1 Java Stack Unwind Features
The Java stack unwind features are useful for troubleshooting problems in the Java VM. Following
is a list of the Java stack unwind features:
• View mixed language frames information, including Java frames and C/C++ native frames,
in a gdb backtrace.
• Distinguish various Java frame types including interpreted, compiled, and adapter frames.
• View Java method name, signature, and class package name for Java method frames.
Additional stack unwind features are available starting with SDK 1.4.2. These features fall into
three categories: Java stack unwind enhancements, Java heap support, and Java threads support.
These additional features are available as part of the Java stack unwind enhancements:
• View Java compiled frame inlined methods.
• View Java interpreted or compiled frame specific information.
• View Java interpreted or compiled frame arguments and local variables.
• Disassemble Java method bytecodes.
• Print out the Java unwind table.
These additional features are available as part of Java heap support:
• View Java heap parameters.
• Dump Java object.
• Print Java heap histogram.
• Find all the instances of a given Java class.
• Find all the references to a given object in the Java heap.
• Find out the object OOP (object-oriented pointer) of the given field address.
These additional features are available as part of Java threads support:
• View Java threads state information.
• View current Java thread information.
• View Java interpreted frame monitors information.
172 HP-UX Configuration-Specific Information