gc-8.0.0

[Bruce Dubbs]

New major version.

[Douglas R. Reno]

This update will be quite interesting to perform.

== [8.0.0] 2018-09-05 ==

* 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

[Douglas R. Reno]

I notice no major breakage, at least with GUILE. Committing.

[Douglas R. Reno]

Fixed at r20563