The Full Debug Symbols (FDS) feature is disabled for Java on
Solaris X64 by the following code:

make/solaris/makefiles/defs.make:

   129    ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
   130      # Default OBJCOPY comes from the SUNWbinutils package:
   131      DEF_OBJCOPY=/usr/sfw/bin/gobjcopy
   132      ifeq ($(VM_PLATFORM),solaris_amd64)
   133        # On Solaris AMD64/X64, gobjcopy is not happy and fails:
   134        #
   135        # usr/sfw/bin/gobjcopy --add-gnu-debuglink=<lib>.debuginfo <lib>.s
o
   136        # BFD: stKPaiop: Not enough room for program headers, try linking
with -N
   137        # /usr/sfw/bin/gobjcopy: stKPaiop: Bad value
   138        # BFD: stKPaiop: Not enough room for program headers, try linking
with -N
   139        # /usr/sfw/bin/gobjcopy: libsaproc.debuginfo: Bad value
   140        # BFD: stKPaiop: Not enough room for program headers, try linking
with -N
   141        # /usr/sfw/bin/gobjcopy: stKPaiop: Bad value
   142        _JUNK_ := $(shell \
   143          echo >&2 "INFO: $(DEF_OBJCOPY) is not working on Solaris AMD64/X
64")            
   144        OBJCOPY=
   145      else
   146        OBJCOPY=$(shell test -x $(DEF_OBJCOPY) && echo $(DEF_OBJCOPY))
   147        ifneq ($(ALT_OBJCOPY),)
   148          _JUNK_ := $(shell echo >&2 "INFO: ALT_OBJCOPY=$(ALT_OBJCOPY)")
   149          OBJCOPY=$(shell test -x $(ALT_OBJCOPY) && echo $(ALT_OBJCOPY))
   150        endif
   151      endif


Once a Solaris 10 patch for the following bug is available:

    7165593 2/3 gobjcopy fails with 64-bit libjvm.so on Solaris X64

then the FDS feature can be enabled on Solaris X64 and further
testing can be done.