8.2.0

Changes

• Add API for accessing incremental GC time limit with nanosecond precision
• Add API function to force start of incremental collection
• Add GC_ prefix to scan_ptr and some other static variables (refactoring)
• Add GC_get/set_disable_automatic_collection API
• Add I_HOLD_LOCK assertion to expand_hp_inner and related functions
• Add assertion on free-list argument and result of GC_new_kind
• Add assertion that GC is initialized to base incremental_protection_needs
• Add assertions that GC_page_size is initialized
• Add cordtest, staticrootstest, test_cpp, tracetest, disclaim tests (CMake)
• Add debug messages on thread suspend/resume (Win32)
• Add dummy testing of GC_incr_bytes_allocd/freed
• Add table of contents in gcdescr.md
• Add testing of GC_CALLOC/MALLOC_EXPLICITLY_TYPED (gctest)
• Adjust formatting of numbered lists in README.md to match other .md files
• Adjust highlighting of API prototypes in gcinterface.md
• Adjust macro def/usage for AVR32, CRIS, NETBSD, OPENBSD, SH4 in gcconfig.h
• Adjust printf calls in gctest check_heap_stats so that each has new-line
• Allow incremental GC on Cygwin
• Allow memory unmapping in case of MPROTECT_VDB
• Allow to disable GWW or mprotect-based VDB at build
• Allow to disable Glibc FPU exception mask and TSX workarounds (Linux)
• Allow to disable __builtin_return_address(1) usage (x86 and x64)
• Allow to specify custom value of LOG_PHT_ENTRIES
• Always abort on failure to access /proc/self/maps (Linux)
• Always define default_push_other_roots (code refactoring)
• Avoid gcc stringop-overflow warning for intended overflow in smashtest
• Avoid initial 3ms pause on world stop/start with GC_retry_signals (Linux)
• Build cord.lib by Makefile.direct, NT_MAKEFILE, OS2_MAKEFILE, WCC_MAKEFILE
• Build gc as a shared multi-threaded library by default (CMake)
• Build gccpp library by Makefile.direct, NT_MAKEFILE and WCC_MAKEFILE
• Build gctba library
• Build shared libraries by default (WCC_MAKEFILE)
• Change CLOCK_TYPE to timespec for Nintendo Switch (code refactoring)
• Change EMSCRIPTEN macro for internal use to no-underscore format
• Change log_size fields of finalizer to unsigned type (code refactoring)
• Change type of toggleref_array_size/capacity to size_t (code refactoring)
• Check leak of objects allocated by CRT malloc in gctest (MS VC)
• Check real-symbols are already initialized in pthread_join/detach
• Collapse multiple includes of windows.h (code refactoring)
• Comments reformatting in mark.c to properly delimit sentences
• Compile de test GUI app with resources (CMake)
• Compile gc.c unless building static libraries (NT_MAKEFILE, WCC_MAKEFILE)
• Compile msvc_dbg.c by CMake script (MS VC)
• Declare API function and print amount of memory obtained from OS
• Define GC_win32_free_heap API function for all Windows targets
• Define STATIC macro to static by default
• Depend number of fork_a_thread calls on NTHREADS (gctest)
• Detect dladdr() presence in CMake script
• Detect presence of execinfo.h system header in CMake script
• Detect presence of getcontext and dl_iterate_phdr in CMake script
• Detect sigsetjmp() availability in CMake script
• Disable Clang/GCC aliasing optimization in CMake script by default
• Do not build tests by default (Makefile.direct and other Makefiles)
• Do not build the tests by default (CMake)
• Do not call GC_push_conditional unless PROC_VDB
• Do not call add_to_our_memory with null pointer (refactoring)
• Do not compile pthread_*.c files in Cygwin or MSYS (CMake)
• Do not define GC_write_cs for Xbox One target
• Do not define HAVE_NO_FORK for all Unix-like systems
• Do not hard-code CMAKE_DL_LIBS value and install paths (CMake)
• Do not hard-code finalizable objects limit which triggers GC
• Do not update scratch_last_end_ptr unless used by reg dynamic libraries
• Document GC_incr_bytes_allocd/freed API function
• Eliminate '(long)size<=0 is always false' cppcheck FP
• Eliminate 'Consecutive return is unnecessary' cppcheck style warning
• Eliminate 'accessing GC_dont_gc without lock' in GC_init code defect FP
• Eliminate 'bytes_freed access w/o lock in incr_bytes_free' code defect FP
• Eliminate 'checking if unsigned i < 0' cppcheck FP in is_heap_base
• Eliminate 'hash_val value is never used' cppcheck false positive
• Eliminate 'passing tainted var maps_buf to tainted sink' code defect FP
• Eliminate 'retry_cnt is assigned value but never used' cppcheck FP
• Eliminate 'stop variable is always 0' compiler warning in print_callers
• Eliminate 'struct member os_callback is never used' cppcheck warning
• Eliminate 't->flags not atomically updated' code defect FP
• Eliminate 'tmpl might be accessed at non-zero index' cppcheck error
• Eliminate GCC warning of unsafe __builtin_return_address(1)
• Eliminate code duplication in reclaim_clear and disclaim_and_reclaim
• Eliminate double lock code defect false positive in generic_lock
• Eliminate memory leak reported in add_current_malloc_heap at exit (Win32)
• Emscripten single-threaded support (detect stack base, push registers)
• Enable CMake-based build for Borland and Watcom compilers
• Enable compilation without C runtime (Win32)
• Enable fork testing in single-thread builds (Unix-like)
• Enable mprotect-based incremental GC for Linux/arm and Linux/aarch64
• Enable true incremental collection even if parallel marker is on
• Enable use of __builtin_unwind_init() if clang-8 or later
• Ensure ELFSIZE is defined in dyn_load.c for OpenBSD (code refactoring)
• Ensure add_to_heap_inner arguments are valid (refactoring)
• Ensure all getters and setters are run at least once by gctest (pthreads)
• Export CMake targets with namespace BDWgc
• Fix 'const obj must be initialized if not extern' error in gc_alloc_ptrs.h
• Fix ./libgc.la dependency on FreeBSD (Automake)
• Fix HOST determination in CMake script
• Fix copyright message in de_win.rc, gc_cpp.cc, ec.h and specific.h
• Fix missing OS_TYPE definition for some targets
• Fix mmap(PROT_NONE) failure if RLIMIT_AS value is low (Linux)
• Generate cordtest and de executable files in GC base folder
• Generate pkg-config metadata file (CMake)
• Get rid of some non-ELF ifdefs (code refactoring)
• Handle potential incomplete buffer read in GC_linux_main_stack_base
• Implement GET_TIME for Nintendo Switch
• Increase NTHREADS value in tests if code coverage analysis
• Install docs and man page if enable_docs (CMake)
• Install gc_gcj.h and gc_pthread_redirects.h only if appropriate
• Log abort message details even if not print_stats (unless SMALL_CONFIG)
• Mark buffer returned by get_maps as const (code refactoring)
• Move C++ GC_ATTR_EXPLICIT and GC_NOEXCEPT definition to gc_config_macros.h
• Move GC state non-pointer variables into GC_arrays (code refactoring)
• Move GC state pointer variables into GC_arrays
• Move GC_scratch_recycle_inner() to alloc.c (refactoring)
• Move GC_throw_bad_alloc definition to new C++ file
• Move QNX and Emscripten macro definitions to proper place in gcconfig.h
• Move definition of GC_n_mark_procs and GC_n_kinds from mark.c to misc.c
• New API (GC_set_markers_count) to control number of parallel markers
• New API function to clear GC exclusion table
• New API function to get size of object debug header
• New API standalone functions to acquire and release the allocator lock
• New CMake option (disable_gc_debug) to remove debugging code
• New CMake option (disable_handle_fork) to disable fork handling completely
• New macro (CONSOLE_LOG) to enable logging to console on Win32
• New macro (GCTEST_PRINT_VERBOSE) to enable verbose logging in test.c only
• New macro (NO_MSGBOX_ON_ERROR) to avoid message box on GC abort (Win32)
• OpenBSD does not use ELF_CLASS (code refactoring)
• Pass -D GC_DLL -fvisibility=hidden if default configure build is requested
• Pass -no-undefined linker flag if building shared libraries (CMake)
• Print pid of child processes if verbose logging (gctest)
• Read environment variables from a file on WinCE (CMake script)
• Reduce stack-allocated buffer in get_nprocs from 4KB to 1.7KB
• Refine flags field comment in pthread_support.h
• Reflect result of VDB selection at runtime in incremental_protection_needs
• Reformat code of GC_push_roots
• Reformat gc.man (wrap long lines)
• Reformatting and code refactoring of CMake script
• Remove 'current users' section from overview.md
• Remove 'distributed ports', 'scalable versions' sections from overview.md
• Remove AC_MSG_RESULT for THREADDLLIBS (dgux386)
• Remove Borland-specific Makefile and gc.mak script
• Remove GC_eobjfreelist variable in typd_mlc.c (code refactoring)
• Remove GC_gcj_malloc_initialized variable (code refactoring)
• Remove Linux-specific commands for building cord/de from Makefile.direct
• Remove Win32 main_thread static variable if threads discovery is disabled
• Remove code duplication between GC_unmap and GC_unmap_gap (refactoring)
• Remove code duplication between PROTECT and UNPROTECT macros (refactoring)
• Remove commented out assignment of gc_use_mmap in configure (refactoring)
• Remove dash characters comprising prefix of some verbose logs (gctest)
• Remove dependency on user32.dll import library from static libgc (Win32)
• Remove documentation specific to particular old BDWGC releases
• Remove duplicate Linux-related macro definitions in gcconfig.h
• Remove duplicate macro definitions in gcconfig.h except for Linux
• Remove gcmt-dll generation, rename libgc-lib.a to libgc.a (CMake)
• Remove goto statement in print_callers (code refactoring)
• Remove limit on number of heap sections
• Remove new_gc_alloc.h file
• Remove redundant GC_with_callee_saves_pushed call in multi-threaded builds
• Remove redundant check of GC_free argument in register_finalizer
• Remove redundant type casts in backgraph HEIGHT_UNKNOWN/IN_PROGRESS
• Remove unused GC_prev_heap_addr (refactoring)
• Remove unused STACK_GRAN macro definitions (code refactoring)
• Remove unused sparc_sunos4_mach_dep.s file
• Remove useless empty statements after block ones (refactoring)
• Remove weakobj_free_list variable in disclaim_weakmap_test (refactoring)
• Rename READ to PROC_READ in os_dep.c (code refactoring)
• Rename cord/cord test executable to de (CMake)
• Rename ext_descr to typed_ext_descr_t (code refactoring)
• Rename gc64.dll to gc.dll and gc[64]_dll.lib to gc.lib in NT_MAKEFILE
• Rename gc68060.lib to gc.lib, cord/cord68060.lib to cord.lib in SMakefile
• Rename make_as_lib option to enable_static in NT_MAKEFILE and WCC_MAKEFILE
• Rename nothreads option to disable_threads in NT_MAKEFILE
• Repeat run_one_test NTHREADS times by gctest if single-threaded
• Replace "msecs" with "ms" in all comments and messages
• Replace 'stack base' with 'stack bottom' in the documentation
• Replace SN_TARGET_ORBIS to PLATFORM_* and GC_NO_* macros
• Replace _M_AMD64 macro with _M_X64 (code refactoring)
• Replace find_limit_openbsd to find_limit_with_bound (OpenBSD 5.2+)
• Replace obsolete AC_HELP_STRING with AS_HELP_STRING (refactoring)
• Replace push_one calls with push_many_regs one for Win32 thread context
• Report memory region bounds and errno on GC_unmap/remap failure
• Report presence of process fork testing (gctest)
• Report time with a nanosecond precision where available
• Retry suspend/resume signals on all platforms by default
• Run tree and typed tests in child process (gctest)
• Set GC_collecting hint for GC_collect_a_little_inner calls (pthreads)
• Set name of GC marker threads
• Set so-version for installed shared libraries (CMake)
• Simplify logged message in scratch_recycle
• Simplify loops of collect_a_little/stopped_mark invoking mark_some
• Support -fvisibility=hidden option in CMake script
• Support CFLAGS_EXTRA to pass extra user-defined compiler flags (CMake)
• Support FreeBSD/RISC-V, Linux/arc, LoongArch, OpenBSD/powerpc64
• Support header files installation (CMake)
• Support most configure options in CMake script
• Suppress warnings in test_tinyfl() of gctest reported by Watcom C complier
• Take nanoseconds into account when updating full_gc_total_time
• Turn off C++ API by default, export it in gccpp library (CMake)
• Turn on automatic fork() handling by default on Android
• Update README.cmake regarding Unix, C++ and tests
• Update libgc.so version info to differentiate against v8.0.x
• Update the ASCII diagrams describing the tree structure for pointer lookups
• Update the documentation to match the current GC implementation
• Upgrade cmake_minimum_required(version) to 3.1
• Use CreateThread without GC_ prefix in gctest (code refactoring)
• Use KB/MB/GB abbreviations uniformly across entire documentation
• Use USE_MMAP_ANON when USE_MMAP is configured on OpenBSD
• Use a specific Emscripten allocator for Tiny
• Use atomic primitives for Sony PlayStation Portable 2 and PS4
• Use better precision Windows timers
• Use clock_gettime() instead of clock() on Cygwin and Linux
• Use compiler TLS on FreeBSD and NetBSD
• Use mprotect-based VDB on PowerPC and S390 (Linux)
• Use soft dirty bits on Linux (i386, powerpc, s390, x86_64)
• Workaround 'condition result<=0 is always false' cppcheck FP in get_maps
• Workaround 'push_regs configured incorrectly' error (GCC-11)
• Workaround 'same value in both branches of ternary operator' cppcheck FP
• Workaround various cppcheck false positives

Build status

Travis CI build
AppVeyor CI build
Coveralls status (code coverage)

Distribution Tarball

gc-8.2.0.tar.gz (see the Assets above, md5: c3c04af9c1e4209e315eee50efe7b320)