Followup to r14898 which changes the storage of segment names by
putting them into a string table.
This patch adds reference counting to segment names and frees them
when they are no longer used. The so freed memory can be reclaimed to
store future segment names.
New file coregrind/m_aspacemgr/aspacemgr-segnames.c which has all the
code dealing with segment names. Carved out of aspacemgr-linux.c
Detailled comments in the code.
Fixes BZ 344559.

git-svn-id: svn:// a5019735-40e9-0310-863c-91ae7b9d1cf9
5 files changed