news

减少内存碎片的malloc分配函数

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$Id: NEWS,v 1.120 2004/10/19 14:50:52 gray Exp $
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Version 5.4.2 (10/19/2004):

	* Fixed a couple of longer standing stupid alloc/free blank bugs.

Version 5.4.1 (10/12/2004):

	* Found and fixed a stupid little testing bug.

Version 5.4.0 (10/12/2004):

	* Added return.h support for ARM processors.
	* Made allocation of 0 sized chunks the default.
	* Fixed some missing ; and a int/unsigned-int bug.
	* Added return.h support for AIX 4.3 RS/6000.
	* Added backwards compatibility for %d usage in logfile name.
	* Removed force-linear token because made invalid with mmap addition.
	* Added mmap usage inside of the library.  Should it be the default?
	* Internal random algorithm now seeded with fixed value.
	* Really improved the logging of error information about pointers.
	* Added return.h support for ia64 machine type.
	* Increased the maximum source file length from 10k to 30k.
	* Added compat and arg_checking of atoi, atol, and memmove.
	* Added arg checking to internal strdup functions.

Version 5.3.0 (01/28/2004):

	* Fixed bad bug where arch_check funcs weren't locking point checks.
	* Added dmalloc_verify_pnt function for proper external pointer checks.
	* Added dmalloc_memory_allocated function to help memory size checks.
	* Added --start-size to dmalloc to start checks after alloc X bytes.
	* Added check-shutdown token and support to check pointers on shutdown.
	* Added dmalloc_count_changed function.
	* Added ability to disable the LARGEST_ALLOCATION setting it to 0.

Version 5.2.4 (11/18/2003):

	* Fixed bug with check-fence and check-funcs interaction.  Thanks John.
	* Added support for rc shell.  Thanks Michael.
	* Fixed a logfile NULL pointer printf.  Thanks John.
	* Fleshed out the error code documentation.
	* Fixed Makefile.in to properly refer to docs directory.  Thanks Mike.
	* Improved the docs about alias creation and usage.
	* Added testing for destructors in configure.

Version 5.2.3 (09/29/2003):

	* Added new GetEnvironmentVariableA Cygwin call.  Thanks to Rolf.
	* Added quick checks for the constructor attribute.
	* Changed configure script to define HAVE_... to 0 or 1.  Thanks Brian.
	* Removed usage of environ from dmalloc_argv.c.  Thanks Brian.

Version 5.2.2 (09/08/2003):

	* Added a Cygwin section to the manual.
	* Added GETENV_SAFE testing for Cygwin environments.  Feedback needed.
	* Fixed bug in function args pnt checking.  Thanks TJ and Philippe.
	* Improved pnt checking code to properly check free space above alloc.
	* Fixed possible lock leak in the shutdown code.  Thanks TJ.
	* Changed the installing of libraries to install-data. 

Version 5.2.1 (07/08/2003):

	* Fixed problems with macro arguments not in ().  Thanks Paul.
	* Fixed problem with strdup not returning char *.  Thanks Dan, Juhani.

Version 5.2.0 (06/10/2003):

	* Renamed the "max memory space wasted" to "max unused memory space".
	* Added PDF documentation files to the installation.
	* Fixed a problem with the global Makefile and dmalloc_t.  Thanks Bert.
	* Added new logfile expansion of %u as getuid() output.
	* Added new logfile expansion of %h as gethostname() output.
	* Added new logfile expansion of %t as time() output.
	* Added new logfile expansion of %p as getpid() output.
	* Added new logfile expansion of %i as thread-id output.
	* Removed the old logfile % processing.  %d no longer expands to pid.
	* Added LOG_PID to settings.dist to log pid on each line of logfile.
	* Added LOG_REOPEN to reopen log if pid changes (fork).  Thanks James.
	* Renamed LOG_ITERATION_COUNT to LOG_ITERATION in settings.dist.
	* Renamed STORE_SEEN_COUNT to LOG_PNT_SEEN_COUNT in settings.dist.
	* Renamed STORE_ITERATION_COUNT to LOG_PNT_ITERATION in settings.dist.
	* Renamed STORE_TIME to LOG_PNT_TIME in settings.dist.
	* Renamed STORE_TIMEVAL to LOG_PNT_TIMEVAL in settings.dist.
	* Renamed LOG_THREAD_ID to LOG_PNT_THREAD_ID in settings.dist.
	* Improved the log_stats and log_changed output a bit.

Version 5.1.0 (06/08/2003):

	* Fixed the FREED_POINTER_DELAY functionality.
	* Removed PROTECT_BLOCKS from settings.dist because was unused.
	* Added contrib/tsecs perl script which converts epoch secs to ctime.
	* Removed the unused check-lists debug token.
	* Fixed the realloc-copy and never-reuse functionality.
	* Improved the stats output.
	* Added many automatic tests to dmalloc_t.
	* Expanded the arguments to dmalloc_examine to return more information.
	* Found/fixed problem where last-used mark was not set right properly.
	* Found/fixed bad problem where leaked memory was not being reported.

Version 5.0.2 (06/04/2003):

	* Fixed some problems and improved code in the test utility dmalloc_t.
	* Integrated an internal random number generator to stop recursion.
	* Improved some of the configure script internals.
	* Added support for a.exe and other cc output forms for Windoze.

Version 5.0.1 (05/20/2003):

	* Updated configure.ac script.
	* Added dmalloc_page_size() function.
	* Improved the auto-testing in dmalloc_t.
	* Found a [bad] problem with putting pointers back on the free list.
	* Added some checking of pointers on the free list.
	* Added the per-pointer checking for cleared free memory.
	* Compressed the per-pointer admin structure by 8 bytes.

Version 5.0.0 (05/16/2003):

	* Added -M --memory-limit argument to dmalloc to limit allocations.
	* Deprecated log-blocks and heap-check-map debug tokens.
	* Added a currently in use stats to log-stats.
	* Removed a number of old error codes.
	* Fixed some literal ranlib entries in the Makefile.in.
	* Removed the USE_DMALLOC_LEAP functionality to simplify.
	* Added a function to re-open the logfile when processing flags.
	* Added section to docs about debugging daemon and CGI processes.
	* Made some cosmetic improvements to the configure.in script.
	* Due to public pressure, I've made free(0L) not an error by default.
	* Added separate characters for blanking allocs (0xda) vs frees (0xdf).
	* Removed short token support.  Was anyone using this?
	* Did some more work on testing and chunk.c changes.
	* Added better autoconf checking of thread libraries for FreeBSD.
	* Added dmalloc_debug_setup function to set dmalloc flags thru a call.
	* Significantly changed how the library manages fence protected allocs.
	* Renamed _dmalloc_logpath to dmalloc_logpath to match the docs and .h.
	* Solved problem with dmalloc_t and no sbrk.
	* Added INTERNAL_MEMORY_SPACE setting to the settings.dist file.
	* Added the 'How It Works' section to the manual.
	* Removed necessity of strcat.
	* Removed use of strcpy internally.
	* Fixed problem with use of start-count and start-file.

Version 4.8.2 (02/26/2001):

	* Installed new configure script to remove C++ requirement.
	* Added more information to error messages on freed memory overwrite.
	* Added heap checking when we shutdown if check-blank is enabled.
	* Added separate ALLOC_BLANK_CHAR and FREE_BLANK_CHAR to settings.dist.

Version 4.8.1 (11/14/2000):

	* Added --enable-shlib to configure to enable building of shared libs.
	* Added autoconf handling of the shlibdir for installing shared libs.
	* Added improvements to the shared library creation in the Makefile.
	* Fixed the #ident "..."; semi-colon problem.

Version 4.8.0 (11/10/2000):

	* Added OpenBSD port information.  Hopefully Free/Net/... BSD as well.
	* Renamed malloc.h to malloc_funcs.h to avoid system conflicts.
	* Made log-unknown the default and depreciated the token.
	* Added log-known token to _only_ report on known (file/line) memory.
	* malloc_verify, dmalloc_verify now return [D]MALLOC_VERIFY_[NO]ERROR.
	* Just about every dmalloc function now initializes the library.
	* dmalloc_debug now takes unsigned-int flags and returns the old flags.
	* debug_current now returns an unsigned int flag value.
	* Added autoconfig handling of #ident. I hate Unix's lack of standards.
	* Fixed a bug in chunk.c.

Version 4.7.1 (07/25/2000):

	* Fixed problem with check-blank on but not free-blank or alloc-blank.

Version 4.7.0 (07/24/2000):

	* Added support for --disable-cxx and --enable-threads to configure.
	* Added autoconf code to see if the return macros work for an system.
	* Renamed USE_RET_ADDRESS to USE_RETURN_MACROS in settings.dist/h.
	* Added threaded C++ library support to Makefile.
	* Fixed problems with -p and -m not setting the debug flags.
	* Added 'force-linear' and depreciated the 'allow-nonlinear' token.

Version 4.6.0 (05/17/2000):

	* Reworked internal init values for env vars pointed out by Carlton.
	* Fixed bug found by Mcvey where the 1st dblock alloc in block missed.
	* Moved to 'make cxx' and 'make installcxx' for building C++ library.
	* Removed DMALLOC_VERIFY_[NO]ERROR and replaced with DMALLOC_[NO]ERROR.
	* dmalloc_examine now returns DMALLOC_[NO]ERROR not [NO]ERROR.
	* Added initial mprotect configuration and stub functions.
	* Added autoconf building of cxx library per Dimitri's comments.
	* Revamped rpm.spec and renamed to dmalloc.rpm per Dimitri's comments.

Version 4.5.2 (04/18/2000):

	* Fixed bug in chunk.c pointer checking.  Thanks Ezra.
	* Cleaned up some of the compat.[ch] headers to better match reality.
	* Reorganized dmalloc.texi documentation and moved to using makeinfo.

Version 4.5.1 (03/30/2000):

	* Fixed a compilation problem in dmalloc_lp.c.

Version 4.5.0 (03/29/2000):

	* Added new dmalloc_mark() and dmalloc_log_changed() functions.

Version 4.4.0 (03/20/2000):

	* Removed the stupid old Deansify.pl script.
	* Added rpm.spec file to the distribution.
	* Added code to fix some recursive problems with open and atexit.
	* Basically encorporated Randell's changes [finally].  Thanks dude.
	* Removed the stupid chunk.c unions.  Why did I ever do that?
	* www.dmalloc.com -> dmalloc.com.
	* Added better help messages to dmalloc.
	* Fixed Makefile.dep creation with _th.o special objects.
	* Fixed the outputting of gratuitous colons.
	* Added @uref texinfo tags and new texinfo.tex.

Version 4.3.0 (11/08/1999):

	* Fixed problems on Linux with the strdup macro. 
	* Added copyright and url info for ident and what.
	* Added support for PTHREAD_MUTEX_INITIALIZER.
	* Added USE_DMALLOC_LEAP define in the settings.dist file.
	* Dmalloc now looks in the current directory for .dmallocrc before ~.
	* Rewrote a significant piece of the dmalloc utility.
	* Increased the filename size from 40 to 100 characters.

Version 4.2.0 (03/11/1999):

	* Improved the autoconfig of abort and qsort safety.
	* Added memory tracking function to be called on each mem transaction.
	* Added DUMP_UNFREED_SUMMARY_ONLY variable to settings.dist.
	* Added MEMORY_TABLE_SIZE and MEMORY_TABLE_LOG vars to settings.dist.
	* Fixed problem with valloc exposed by moving to random().
	* Fixed long standing problem with the NEVER-REUSE token.
	* Added memory table code for grouping of allocated and non-freed mem.
	* Removed a number of static variables for string buffers.
	* Removed PERMISSION file and all references to commercial-ness.
	* Moved to internal sprintf code for snprintf, etc..
	* Added dmalloc_message to the exported list of functions.

Version 4.1.2 (12/11/1998):

	* Fixed really bad bug which basically killed pthread support.

Version 4.1.1 (11/16/1998):

	* Fixed signal autoconfiguration.

Version 4.1.0 (11/16/1998):

	* Added HTML versions of the manuals to the releases.
	* Added FREED_POINTER_DELAY in settings.h.  Delays pointer reuse.
	* Renamed allow-zero token to be allow-free-null.
	* Added LOG_TIME_NUMBER and LOG_CTIME_STRING to the settings.h.
	* Disabled the log-thread-id macro.  Use LOG_THREAD_ID in settings.h.
	* Disabled the log-stamp macro.  Use LOG_TIME_NUMBER in settings.h.
	* Added -g (--gdb) flag to dmalloc utility along with gdb script.
	* Added missing delete[] function to the C++ code.
	* Moved some settings from chunk_loc.h into settings.dist.
	* Improved the handling of free(NULL) and malloc(0) settings.
	* Added initial memalign support with a first-time error message.
	* Renamed print-error token to print-messages.
	* Increased the default max memory size from 16mb to 64mb.

Version 4.0.3 (10/15/1998):

	* Found and fixed a bug when reallocing a previous valloced section.

Version 4.0.2 (10/15/1998):

	* Fixed a problem in return.h and DMALLOC_UNKNOWN_FILE.

Version 4.0.1 (10/08/1998):

	* Added startup messages acknowledging the thread status.
	* Fixed problem with thread compilation and chunk.c.
	* Fixed possible race condition with synchronizing with external sbrks.