1) it doesn't allow me to set breakpoint at line 720 or 722 in metaspaceShared.cpp
(lldb) breakpoint set --file metaspaceShared.cpp --line 720
Breakpoint 7: where = libjvm.dylib`MetaspaceShared::preload_and_dump(Thread*) + 299 at metaspaceShared.cpp:728, address = 0x0000000101ec640b
(lldb) breakpoint set --file metaspaceShared.cpp --line 722
Breakpoint 8: where = libjvm.dylib`MetaspaceShared::preload_and_dump(Thread*) + 299 at metaspaceShared.cpp:728, address = 0x0000000101ec640b

(Note that it set breakpoint at line 728 instead)

2) at line 728, I couldn't inspect the class_list_path variable:

(lldb) n
Process 18399 stopped
* thread #3: tid = 0xdf81a, 0x0000000101ec63e9 libjvm.dylib`MetaspaceShared::preload_and_dump(__the_thread__=0x0000000100812800) + 265 at metaspaceShared.cpp:728, stop reason = step over
    frame #0: 0x0000000101ec63e9 libjvm.dylib`MetaspaceShared::preload_and_dump(__the_thread__=0x0000000100812800) + 265 at metaspaceShared.cpp:728
(lldb) frame variable class_list_path
(const char *) class_list_path = <no location, value may have been optimized out>

3) when it called into the preload_and_dump at line 776, the class_list_path was set incorrectly without the "classlist" filename.

(lldb) cont
Process 18399 resuming
Process 18399 stopped
* thread #3: tid = 0xdf81a, 0x0000000101ec6595 libjvm.dylib`MetaspaceShared::preload_and_dump(class_list_path=0x0000000102d617a0, class_promote_order=0x0000000100813040, __the_thread__=0x0000000100812800) + 45 at metaspaceShared.cpp:776, stop reason = breakpoint 3.2
    frame #0: 0x0000000101ec6595 libjvm.dylib`MetaspaceShared::preload_and_dump(class_list_path=0x0000000102d617a0, class_promote_order=0x0000000100813040, __the_thread__=0x0000000100812800) + 45 at metaspaceShared.cpp:776
(lldb) frame variable class_list_path
(const char *) class_list_path = 0x0000000102d617a0 "/Users/ccheung/test_compiler_upgrade/jdk1.9.0/fastdebug/jre/lib"