* src/rtl/filebuf.c
! unlock HVM stack before locking local mutex and calling hb_fs*()
functions which also unlocks HVM. It fixes possible deadlock condition
when hb_gcAll( .T. ) is executed.
* include/hbapi.h
* src/vm/garbage.c
! changed mark function semantic.
Adding support for user defined mark function I created race condition
in MT GC code. It happens because blocks marked as deleted were not
scanned by GC mark code so their subitems where not accessible.
To fix it we have to change mark function semantic. Now mark function
can be executed also for blocks currently deleted. It means that GC
block destructor should clean references to just removed items and
subblocks. The best place to make it is clearing pointers to GC blocks
just after hb_itemRelease() or hb_gcRefFree().
It is save to clean the reference just before hb_itemRelease() or
hb_gcRefFree() but only for the single block passed to these functions.
It is not save to clear reference to more then one block and then
execute above functions.
+ check reference count after destructor execution for all blocks
not only arrays - warning it may exploit some wrong C code.
- removed not longer used hb_gcRefCheck() function.
* include/hbvm.h
* src/vm/hvm.c
+ added new internal function hb_vmLockForce()
! fixed to mark GC blocks with active threads
* src/vm/thread.c
* include/hbthread.h
% modified sync mutexes used by xBase++ signal class emulation
to not use item array internally
* updated mutex destructor to new GC mark semantic
! mark GT items if GT is bound with thread item
! fixed mutex notify/subscribe code to not change GC items
when HVM stack is unlocked
! use hb_vmLockForce() to eliminate potential deadlock
+ added new C function hb_threadEnterCriticalSectionGC().
It should be used instead of hb_threadEnterCriticalSection()
in code which manipulates GC items inside critical section.
It's slower but eliminates possible deadlock condition.
Please remember that remember that both functions cannot
be used for the same mutex. So if it's necessary to use
hb_threadEnterCriticalSectionGC() in one place then it
has to be used in all others when the same mutex is locked.
* src/vm/arrays.c
* src/vm/codebloc.c
* src/vm/hashes.c
* src/rtl/hbgtcore.c
* contrib/hbcurl/core.c
* contrib/hbexpat/core.c
* updated destructors to new GC mark semantic
* contrib/hbxpp/dllx.c
! fixed destructor for pointer item created by DllPrepareCall()
Now it respects reference counter.
; added note about real behavior of library handle destructor,
I haven't changed existing code behavior but maybe it should
be done.
* contrib/xhb/hbserv.c
* src/debug/dbgentry.c
* src/rdd/wacore.c
! fixed possible deadlocks by using hb_threadEnterCriticalSectionGC()
instead of hb_threadEnterCriticalSection().
* contrib/hbmemio/memio.c
! slightly modified hb_memfsDirectory() code to avoid race condition
without using hb_threadEnterCriticalSectionGC()
* src/vm/fm.c
% reduce the lock range in HB_FM_STAT builds
* src/rtl/hbsocket.c
! added missing HVM stack unlocking in hb_socketSelect() function
* src/rtl/gtxwc/gtxwc.c
! added few missing locks for version compiled with HB_XWC_XLIB_NEEDLOCKS
* src/rdd/dbtotal.prg
* allow to use symbols instead of codeblocks
* modified Harbour extension which uses ordKey() as default group
signature to work also without index. In such case all records
are summarized into single one.
; Most of above modifications were critical for stability of MT programs.
They should allow to activate GC in any place.
* src/debug/dbgentry.c
! added additional protection against recursive debugger activation.
It should fix problem reported by Rafa.
* src/rtl/fssize.c
* use explicit open attributes.
* src/rtl/copyfile.c
! reset error object between different RTE calls in __copyFile()
! copy file attributes only on *nix platforms.
In Cl*pper __copyFile() does not copy attributes so maybe also
in *nixes we should make the same.
* contrib/xhb/xhbcopyf.c
* changed hb_fs*() API to hb_file*() API.
* src/debug/dbgentry.c
+ added protection against wrong parameters passed to __dbgDelBreak()
* src/debug/debugger.prg
+ implemented display history for command window.
This modification also fixes clearing command window when focus is
changed.
+ added support for new commands:
DELETE ALL BP
DELETE BP <nNumber>
LIST BP
* replicated Clipper compatible command line shortcuts
! send :RefreshAll instead of :RefreshCurrent to source code window
when break point changed
; TODO: add support for window resizing and repositioning. Commands
like LIST BP are in practice unusable in 3 line command window.
* src/rtl/console.c
% minor optimization
* src/debug/dbgentry.c
! added missing casting
* src/debug/debugger.prg
+ show in call stack references to code compiled without debug info
* src/rtl/itemseri.c
* ignore HB_HASH_RESORT flag during hash serialization
* src/debug/dbgentry.c
+ added new PRG functions:
__dbgIsBreak( <pDbg>, <cModule>, <nLine> ) -> <nPos>
__dbgGetBreakPoints( <pDbg> ) -> <aBreakPoints>
* src/debug/debugger.prg
- removed old and long time unused PRG function __dbgAltDEntry()
* src/rtl/hbproces.c
* changed returned status when execvp() fails, -1 should give
maximal exit code on given platform (i.e. 255)
* include/hbapidbg.h
* src/debug/dbgentry.c
* src/debug/debugger.prg
+ added new C function hb_dbgGetModuleName() - it returns module name
used to register module in HVM. In current version it only strips
path part though in the future it may use some more advanced code
which allow to debug modules with the same name but different paths
in single application and such extension will be local to core debug
code if upper level debugger uses hb_dbgGetModuleName()
+ added new PRG function __DBGGETMODULENAME() - it's wrapper to
hb_dbgGetModuleName()
+ added new PRG function __DBGMODULEMATCH()
! use __DBGMODULEMATCH() instead of hb_FileMatch() and strip_path()
! eliminated strip_path() from PRG code and use hb_dbgGetModuleName()
in C code in places where it's necessary
! replaced few strcmp() used to compare module names with
FILENAME_EQUAL()
; above modification may fix few potential problem with breakpoints
in debugger on some platforms if user uses different paths for
debugger and compilers.
! eliminated hack with memvar/field name copy in watch points,
it also fixes memory leak when fields are used in watch points.
% replaced few DO CASE with SWITCH
* (all files)
* stripped svn header
* minor cleanups
; use following command to find out the history of files:
git log
git log --follow
git blame
git annotate
