8.0.0

Changes

• Accept Android platform by both CMake and configure
• Access finalize_now atomically to avoid TSan warning without no-sanitize
• Acknowledge thread restart from suspend_handler (NetBSD)
• Add a sanity check that load_acquire and store_release are available
• Add AO primitives implementation to GC based on C11 atomic intrinsic
• Add assertion for suspend_ack_sem in start_world
• Add assertion to allocobj that live unmarked object cannot be reclaimed
• Add assertions about held lock when accessing all_bottom_indices
• Add assertions to ensure ADD_CALL_CHAIN is called holding the lock
• Add assertions to finalize and threads support for MANUAL_VDB needs
• Add basic calculation of the total full-collection time
• Add check that gc_cpp operator delete is called (test_cpp)
• Add debug logging to new_thread about GC_threads hash table collisions
• Add GC prefix to _MSVC_DBG_H macro
• Add initial RISC-V support
• Add Makefile target to run all tests without test-driver
• Add test_atomic_ops to perform minimal testing of used atomic primitives
• Add two-argument alloc_size attribute to calloc_explicitly_typed (GCC)
• Align IRIX/OSF1_THREADS definition in gc_config_macros.h with gcconfig.h
• Allocate non-executable memory by default (CMake)
• Allow compilation of PROC_VDB code on Linux host (GC_NO_SYS_FAULT_H)
• Allow configure --with-libatomic-ops=none to use GCC atomic intrinsics
• Allow custom N_LOCAL_ITERS and ENTRIES_TO_GET values
• Allow disabling of dynamic loading in CMake script and configure
• Allow disabling of main static data registration in CMake and configure
• Allow disabling of threads discovery in CMake script and configure
• Allow gc_assertions enabling in CMake script
• Allow gc_debug, redirect_malloc, large_config options in CMake script
• Allow GC_NETBSD_THREADS_WORKAROUND macro manual definition
• Allow mmap enabling in CMake script and configure
• Allow passing -D DEFAULT_VDB to CFLAGS
• Allow subthreadcreate_test to be compiled with zero NTHREADS
• Allow to turn on spin locking even if thread-local allocations are used
• Always include gc_atomic_ops.h unless threads are disabled
• Avoid 'Unexpected heap growth' in 64-bit multi-threaded gctest if n_tests=1
• Avoid duplication of code handling pthreads case in configure
• Avoid potential data race during apply_to_each_object(reset_back_edge)
• Avoid potential data race during GC_dump execution
• Avoid potential race between malloc_kind and mark_thread_local_fls_for
• Avoid potential race between realloc and clear_hdr_marks/reclaim_generic
• Avoid potential race in print_static_roots called by dyld_image_add/remove
• Avoid potential race in SET_MARK_BIT_EXIT_IF_SET if parallel marking
• Avoid potential race when accessing size_map table
• Avoid potential race when storing oh_back_ptr during parallel marking
• Avoid SIGSEGV during GC_INIT on some Android devices
• Build only shared libraries by default (configure)
• Change pointer arguments of push_all[_eager]/conditional API to void* type
• Change type of hb_sz field (of hblkhdr) from size_t to word
• Check consistency of descr, adjust, clear arguments of GC_new_kind
• Check that GC_WIN32_PTHREADS is not specified for Cygwin
• Check thread_local is initialized before accessing thread_key
• Collapse multiple BCOPY_EXISTS macro definitions
• Collapse multiple NT_*_MAKEFILE scripts into a single NT_MAKEFILE
• Collapse multiple page_was_dirty, remove_protection, read_dirty definitions
• Compile checksums.c only if --enable-checksums is given (configure)
• Consistently define WIN32_LEAN_AND_MEAN/NOSERVICE before include windows.h
• Convert .html files to Markdown format
• Convert code of .c files to valid C++ code
• Decide between memory unmapping and mprotect-based dirty bits at runtime
• Declare t local variable in the block where the variable is used
• Define ABORT() using _CrtDbgBreak (if available) on Windows host
• Define CLANG/GNUC_PREREQ macros to check gcc/clang minimum version
• Define DYNAMIC_LOADING for Darwin unless IGNORE_DYNAMIC_LOADING
• Define GC_ASSERT(x) as C assert(x) for external clients of gc_inline.h
• Define GC_PREFETCH_FOR_WRITE to __builtin_prefetch in gc_inline.h (GCC)
• Define GC_THREADS instead of GC_x_THREADS in Makefiles
• Define macro to specify the environment file name extension (Win32/WinCE)
• Define static resend_lost_signals(), restart_all() in pthread_stop_world
• Detect sigsetjmp() availability by configure
• Determine whether to use compiler TLS for kFreeBSD at compile time
• Do not call BCOPY and BZERO if size is zero
• Do not call sem_getvalue in stop_world if one thread exists
• Do not call set_handle_fork(1) in gctest if pthread_atfork not supported
• Do not compile pcr_interface.c and real_malloc.c except by PCR-Makefile
• Do not declare dl_iterate_phdr as weak for kFreeBSD
• Do not include windows.h when compiling gc_cpp.cc
• Do not install gc_allocator.h, gc_disclaim.h unless the features enabled
• Do not merge dynamic root with the existing static one in add_roots_inner
• Do not print n_rescuing_pages value if incremental collections disabled
• Do not push cpsr and frame pointer on Darwin/arm and Darwin/arm64
• Do not rebuild_root_index unless remove_root_at_pos is called
• Do not specify version info for test libraries (Automake)
• Do not use alternate thread library on Solaris
• Do not use asm in GC_pause
• Do not use PKG_CHECK_MODULES in configure
• Do not use system clock consistently if NO_CLOCK
• Do not use x86 asm in PUSH_CONTENTS_HDR for NaCl
• Document GC_BUILTIN_ATOMIC macro (and gc_atomic_ops private header file)
• Document STACK_NOT_SCANNED macro in gcconfig.h (Emscripten)
• Eliminate 'comparison is always false' code defect in get_maps
• Eliminate 'GC_DEBUG redefined' compiler warning in smashtest
• Eliminate 'potential unsafe sign check of a bitwise operation' code defect
• Enable alternative finalization interface (DISCLAIM) in all makefiles
• Enable compilation for Cygwin with MPROTECT_VDB
• Enable handle-fork and memory unmapping by default
• Enable mprotect-based incremental GC for Win64 (GCC)
• Expose API to control rate and max prior attempts of collect_a_little
• Expose API to control the minimum bytes allocated before a GC occurs
• Fix 'comparison of 255 with expr of type bool' error in gc_atomic_ops.h
• Fix 'doc' files installation folder
• Fix build of cord tests as C++ files (Makefile.direct)
• Fix comment typos in backgraph.c, de.c, gcconfig.h
• Fix delete operator redirection if gc_cpp is built as .dll (Cygwin, MinGW)
• Fix start_world not resuming all threads on Darwin
• Fix test_cpp failure in case GC_DEBUG is defined
• Group common defines for POSIX platforms in configure and CMake scripts
• Guard against USE_PTHREAD_LOCKS and USE_SPIN_LOCK are both defined
• Handle pthread restart signals loss if retry_signals
• Hide value stored to thread-specific entries for a test purpose
• Implement FindTopOfStack(0) for ARM and AArch64 (Darwin)
• Implement memory unmapping for Sony PS/3
• Imply configure --single-obj-compilation if --disable-static
• Include malloc.c in extra/gc.c after include gc_inline.h
• Increase MAX_HEAP_SECTS (10 times) for large-config
• Initial single-threaded support of Interix subsystem
• Initial support of Nintendo, Orbis, Sony PSP2, WinRT, Xbox One
• Initial support of TIZEN platform
• Install gc.3 man page instead of copying gc.man to doc folder (configure)
• Make extend_size_map() static (code refactoring)
• Make subthreadcreate test compilable even without libatomic_ops
• Match GC_FAST_MALLOC_GRANS formal and actual arguments where possible
• Move de_win compiled resource files to cord/tests
• Move pcr_interface.c, real_malloc.c to 'extra' folder
• New API function (GC_dump_named) to produce named dumps
• New API function (GC_is_incremental_mode)
• New API function (get_expl_freed_bytes_since_gc)
• New API function (get_size_map_at) to get content of size_map table
• New API to stop and start the GC world externally
• New API to turn on manual VDB at runtime
• New field (expl_freed_bytes_since_gc) in public prof_stats_s
• New macro ALWAYS_SMALL_CLEAR_STACK to avoid clearing large stack sections
• New public API (PTR_STORE_AND_DIRTY) to simplify store-and-dirty operation
• Pass CFLAGS_FOR_PIC value to CFLAGS in Makefile.direct
• Print time passed since GC initialization in GC_dump
• Public API (GC_deinit) to allow Win32 critical sections deletion
• Reduce probability of collision in threads hashtable for 64-bit targets
• Reduce the default MUNMAP_THRESHOLD value to 2 for Sony PS/3
• Refactoring of USE_MMAP/USE_MMAP_ANON pairs definition in gcconfig.h
• Reformat code and comments in gc_allocator.h
• Remove 'dist' target from Makefile.direct
• Remove a redundant check of __cplusplus in Symbian-specific .cpp files
• Remove Android-specific code in gcconfig.h for M68K
• Remove C++ WeakPointer and CleanUp API which lacks implementation
• Remove DGUX_THREADS macro which duplicates GC_DGUX386_THREADS (configure)
• Remove done_init static variable from fnlz_mlc.c
• Remove duplicate definition of ALIGNMENT macro for OpenBSD/arm
• Remove duplicated sample code in leak.md
• Remove EMX_MAKEFILE (add EMX support to Makefile.direct)
• Remove GC code fragment (which already merged) from README.Mac
• Remove GC_GNU_THREADS macro (HURD)
• Remove GENERAL_MALLOC internal macro
• Remove HIGH_BIT macro duplicating SIGNB
• Remove lint-specific code
• Remove Makefile KandRtest target (that supported K&R C compiler)
• Remove MIN_WORDS macro from gc_priv.h
• Remove multi-line macros (FOR_EACH_PRED, ITERATE_DL_HASHTBL_*, PUSH_OBJ)
• Remove name of optional arguments of operator new and new[] in gc_cpp.h
• Remove notes that K&R C compiler is unsupported
• Remove PUSH_CONTENTS_HDR multi-line macro
• Remove redundant check that clear_fl_marks argument is non-null
• Remove redundant THREADS macro checks in alloc.c and gc_priv.h
• Remove stubborn objects allocation code completely, remove stubborn.c
• Remove unnecessary argument casts in add_roots_inner calls
• Remove unnecessary type casts in n_set_marks
• Remove unused USE_GENERIC macro definition and description
• Remove version info in 'de' cord test application
• Replace GC_MALLOC(sizeof T) with GC_NEW(T) in tests
• Replace GC_NO_RETRY_SIGNALS environment variable with GC_RETRY_SIGNALS=0
• Replace some FIXME items with TODO ones
• Run command passed to if_not_there directly from Makefile.direct
• Same type casts for GC_PTR_STORE arguments regardless of GC_DEBUG
• Skip grungy_pages update when mark state invalid to speedup read_dirty
• Skip typed_test in gctest if NO_TYPED_TEST macro is defined
• Support configure --disable-thread-local-alloc option (similar for CMake)
• Support enable_checksums option in CMake script
• Support Haiku multi-threaded build by CMake
• Support threads for DragonFly in configure
• Turn on 'atomic uncollectable' functionality by default (CMake)
• Turn on GC assertions in NT_MAKEFILE for debug builds
• Turn on gcj, disclaim and java finalization by default (CMake)
• Turn on incremental collection in gctest also if DEFAULT_VDB or MANUAL_VDB
• Turn on incremental mode in cordtest and cord/de
• Turn on incremental mode in disclaim_test, test_cpp and staticroots test
• Turn on parallel marker by default for all multi-threaded builds
• Update GC compilation and usage notes for Win32
• Update shared libraries version info to differentiate against v7.6
• Update top_index entry pointer only when the entry is constructed fully
• Use __builtin_expect in SIZET_SAT_ADD macro
• Use __declspec(allocator) for malloc-like prototypes (MS VS 2015+)
• Use __int64 instead of 'long long' in LONG_MULT if appropriate
• Use __thread keyword for Android NDK r12b+ Clang (arm)
• Use atomic allocation for leafs in reverse_test (gctest)
• Use atomic load/store for the concurrently accessed variables in GC_lock
• Use C11 static_assert if available
• Use compiler atomic intrinsics by default if available (configure)
• Use EXPECT FALSE for mark_from code documented as executed rarely
• Use heap-allocated memory for local mark stack of non-marker thread
• Use HOST_ANDROID define instead of PLATFORM_ANDROID
• Use include gc.h with the angle brackets in the man page synopsis
• Use longjmp in fault_handler_openbsd if siglongjmp unavailable (OpenBSD)
• Use MARK_BIT_PER_GRANULE instead of MARK_BIT_PER_OBJ where appropriate
• Use noexcept specifier in gc_allocator and gc_cpp if C++11
• Use same macro (NTHREADS) across all tests to specify number of threads
• Use sigsetjmp() in setjmp_t tool if available
• Use thread-local allocations for all multi-threaded builds
• Use THREAD_EQUAL consistently to compare pthread_t values
• Workaround 'bad pointer arithmetic' false waring in check_annotated_obj
• Workaround Clang optimizer bug crashing clear_stack_inner on OS X 10.8
• Workaround Thread Sanitizer (TSan) false positive warnings

Build status

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

Distribution Tarball

gc-8.0.0.tar.gz (see the Assets above, md5: e1a614247b6d6a071f7677365fbf18a4)