NULL-pointer dereferencing in LIR_OpProfileType::print_instr

On 02/13/2015 12:39 PM, Filipp Zhinkin wrote:
I've found yet another bug:
NULL-pointer dereferencing in LIR_OpProfileType::print_instr.

LIR_OpProfileType's exact_klass is either a valid ciKlass when we know
it statically,
or a NULL when we don't.
Unfortunately, LIR_OpProfileType::print_instr is dereferencing it
without a NULL-check.

A patch with a fix as well as a hs_err file attached to this mail.

I've decided to print "unknown" exact klass's value in case of NULL to
be consistent
with ciTypeEntries::print_ciklass. Missed whitespaces were also added.

// Personally, I would like to print something that starts with a
character that could not
// be a part of a valid java identifier's name (like <unknown>,
<none>, etc.) in order
// to distinguish special values from "unknown" and "none" classes.