Eliminate redundant check in backwards_height

This eliminates 'the condition pred!=NULL is redundant' cppcheck warning.

* backgraph.c [MAKE_BACK_GRAPH] (backwards_height): Remove duplicate
pred!=NULL check (the case of NULL is already handled by
"if(NULL==pred)return 1" statement).

Reduce scope of local variables in GC_remove_all_threads_but_me

This eliminates 'the scope of the variable can be reduced' cppcheck
warning in GC_remove_all_threads_but_me.

* pthread_support.c [CAN_HANDLE_FORK] (GC_remove_all_threads_but_me):
Move p, next, me local variables to an inner scope there they are used.
* win32_threads.c [CAN_HANDLE_FORK] (GC_remove_all_threads_but_me):
Move p, next local variables to an inner scope.

Prevent double inclusion of javaxfc.h and private/specific.h

* include/javaxfc.h [GC_JAVAXFC_H]: Skip the whole header file.
* include/private/specific.h [GC_SPECIFIC_H]: Likewise.
* include/new_gc_alloc.h (GC_ALLOC_H): Rename to GC_NEW_ALLOC_H.
* include/private/dbg_mlc.h (_DBG_MLC_H): Rename to GC_DBG_MLC_H.

Travis CI: Execute cppcheck without sudo and -U long

Use GC_WORD_MAX macro across all C source files
(code refactoring)

* alloc.c (GC_collect_at_heapsize, GC_compute_heap_usage_percent,
GC_add_to_heap, GC_expand_hp_inner): Use GC_WORD_MAX instead of
(word)-1.
* dyn_load.c [DATASTART_IS_FUNC]
(GC_register_dynamic_libraries_dl_iterate_phdr): Likewise.
* finalize.c [KEEP_BACK_PTRS] (GC_notify_or_invoke_finalizers):
Likewise.
* headers.c (GC_install_counts): Likewise.
* include/private/thread_local_alloc.h [GC_GCJ_SUPPORT] (ERROR_FL):
Likewise.
* os_dep.c [NEED_FIND_LIMIT || USE_PROC_FOR_LIBRARIES] (GC_find_limit):
Likewise.
* os_dep.c [MPROTECT_VDB && DARWIN] (GC_mprotect_thread): Likewise.
* pthread_support.c [PARALLEL_MARK] (GC_mark_thread): Likewise.
* win32_threads.c (ADDR_LIMIT): Likewise.
* win32_threads.c [PARALLEL_MARK] (GC_mark_thread): Likewise.
* alloc.c (GC_least_plausible_heap_addr): Use GC_WORD_MAX instead of
ONES macro.
* include/private/gc_priv.h [STACK_GROWS_DOWN] (MAKE_COOLER): Likewise.
* mark.c (GC_set_hdr_marks): Likewise.
* alloc.c (GC_WORD_MAX): Remove definition (in this file).
* headers.c (GC_install_counts): Reformat code.
* include/private/gc_priv.h (ONES): Rename to GC_WORD_MAX.

Add comment about hbp overflow in GC_install_counts
(fix of commit 6a32bb4)

Issue #245 (bdwgc).

* headers.c (GC_install_counts): Better comment for the case of
overflow.

Eliminate 'unreferenced formal parameter' compiler warning in msvc_dbg

* extra/msvc_dbg.c (GetDescriptionFromAddress): Cast format argument
to void.
* extra/msvc_dbg.c (GetDescriptionFromStack): Pass format argument to
GetDescriptionFromAddress (instead of NULL).

Workaround 'pointer addition with NULL pointer' cppcheck error in msvc_dbg

* extra/msvc_dbg.c (GetDescriptionFromStack): Change type of begin,
end, buffer local variables from char* to GC_ULONG_PTR; do not update
size local variable value; do not store elements to description[]
if description is NULL (instead of checking of size is non-zero).

Remove strlen calls with a constant string argument in msvc_dbg
(code refactoring)

* extra/msvc_dbg.c (GetDescriptionFromAddress): Replace
strlen(<literal_str>) to sizeof(<literal_str>)-1.

Use macro to operate on a flag residing in GC_stop_count
(code refactoring of commit 295a2f24e)

* pthread_stop_world.c [!GC_OPENBSD_UTHREADS && !NACL]
(THREAD_RESTARTED): New macro.
* pthread_stop_world.c [!GC_OPENBSD_UTHREADS && !NACL] (GC_stop_count):
Refine comment.
* pthread_stop_world.c [!GC_OPENBSD_UTHREADS && !NACL]
(GC_suspend_handler_inner, GC_stop_world, GC_restart_all): Use
THREAD_RESTARTED.

Document assertion in the setters that used to return old value
(code refactoring)

* misc.c (GC_set_finalize_on_demand, GC_set_java_finalization,
GC_set_dont_expand, GC_set_no_dls, GC_set_max_retries,
GC_set_dont_precollect, GC_set_time_limit): Add comment about GC_ASSERT.

Remove redundant type casts in backgraph HEIGHT_UNKNOWN/IN_PROGRESS
(code refactoring)

* backgraph.c [MAKE_BACK_GRAPH] (HEIGHT_UNKNOWN, HEIGHT_IN_PROGRESS):
Remove unneeded type cast (to signed_word).

Appveyor CI: Test with cygwin (32-bit) configuration

Fix hbp overflow in GC_install_counts

Issue #245 (bdwgc).

The overflow resulted in an infinite loop in GC_install_counts on Win32.

* headers.c (GC_install_counts): If hbp+=BOTTOM_SZ overflow is expected
then break the first loop.

Appveyor CI: Remove echo of environment variables
(code refactoring of commits e9b50024e, 5533d1c7c, 696dd85af)

Fix marks and hb_n_marks consistency when disclaim returns true

* reclaim.c [ENABLE_DISCLAIM] (GC_disclaim_and_reclaim): When a
disclaim callback returns 1 to protect an object from being reclaimed,
mark it to skip it on repeated scans within the cycle. In particular,
this fixes sz*hhdr->hb_n_marks<=HBLKSIZE assertion failure due to
excessive increments of hb_n_marks.

Fix data race in disclaim_weakmap_test statistic counters update
(fix of commit 6eba4218a)

Issue #239 (bdwgc).

The stat_* variables need to be atomically updated, since the locking
of the map is granular (cf WEAKMAP_MUTEX_COUNT) to allow parallelism
between different key hashes.

* tests/disclaim_weakmap_test.c [!AO_CLEAR] (AO_t): Define.
* tests/disclaim_weakmap_test.c [!AO_HAVE_fetch_and_add1]
(AO_fetch_and_add1): Define.
* tests/disclaim_weakmap_test.c (stat_added, stat_found, stat_removed,
stat_skip_marked, stat_skip_locked): Change type back from unsigned to
volatile AO_t.
* tests/disclaim_weakmap_test.c (weakmap_add, weakmap_disclaim):
Update stat_* counters using AO_fetch_and_add1(); move counters update
outside weakmap_lock/unlock block.
* tests/disclaim_weakmap_test.c (main): Cast stat_* counters to
unsigned type in printf() call.

Enable compilation without C runtime (Win32)
(part of commit 193af77 from Unity-Technologies/bdwgc)

* include/private/gcconfig.h [MSWIN32 && !__GNUC__
&& !NO_WRAP_MARK_SOME] (WRAP_MARK_SOME): Do not define if NO_CRT.
* mach_dep.c [!HAVE_BUILTIN_UNWIND_INIT && NO_CRT && MSWIN32]
(GC_with_callee_saves_pushed): Call RtlCaptureContext() instead of
setjmp().
* misc.c [MSWIN32 && _MSC_VER && _DEBUG] (GC_write): Do not call
MultiByteToWideChar() and OutputDebugStringW() if NO_CRT.
* win32_threads.c [NO_CRT] (GC_NO_THREADS_DISCOVERY): Define.
* win32_threads.c [!__GNUC__] (GC_win32_start_inner): Do not use __try
and __finally if NO_CRT.
* win32_threads.c [!CYGWIN32 && !MSWINCE && !MSWIN_XBOX1]
(GC_beginthreadex): Do not define if NO_CRT.

Support UWP/arm64 target

* include/private/gcconfig.h [!_WIN32_WCE && _WIN32 && !__CYGWIN32__
&& !__INTERIX && !SYMBIAN && _M_X64] (X86_64): Define (do not check
_WIN64).
* include/private/gcconfig.h [!_WIN32_WCE && _WIN32 && !__CYGWIN32__
&& !__INTERIX && !SYMBIAN && _M_ARM64] (AARCH64): Define macro.
* win32_threads.c [AARCH64] (GC_push_stack_for): Push Xn (n=0..28) and
Lr registers.

Appveyor CI: Test with cygwin64 configuration

Fix lock assertion violation in get_index if GC_ALWAYS_MULTITHREADED
(fix of commit d5c65315b)

* misc.c [GC_ASSERTIONS && GC_ALWAYS_MULTITHREADED] (GC_init): Move up
LOCK() call to precede GC_expand_hp_inner() call.

Add I_HOLD_LOCK assertion to expand_hp_inner and related functions
(code refactoring)

* alloc.c (GC_expand_hp_inner, GC_collect_or_expand): Add
GC_ASSERT(I_HOLD_LOCK()) at the beginning of the function.
* obj_map.c (GC_register_displacement_inner): Likewise.

Appveyor CI: Test with MinGW and mingw-w64 configurations

Appveyor CI: Refactoring of script to use environment matrix

Enable disclaim_weakmap_test for the single-threaded environment
(fix of commit 0cc2c0e7e)

Issue #239 (bdwgc).

Also, do some code refactoring and reformatting of disclaim_weakmap_test.c.

* tests/disclaim_weakmap_test.c: Reformat code.
* tests/disclaim_weakmap_test.c: Do not include stdarg.h, dbg_mlc.h,
gc.h.
* tests/disclaim_weakmap_test.c (THREAD_CNT): Rename to NTHREADS.
* tests/disclaim_weakmap_test.c: Include errno.h, pthread.h,
gc_atomic_ops.h only if GC_PTHREADS.
* tests/disclaim_weakmap_test.c (NTHREADS): Set to 1 unless GC_PTHREADS.
* tests/disclaim_weakmap_test.c [LINT2] (rand): Redefine to
(int)GC_random() (to workaround a code defect reported by Coverity
Scan).
* tests/disclaim_weakmap_test.c (dief): Remove.
* tests/disclaim_weakmap_test.c (FINALIZER_CLOSURE_FLAG,
INVALIDATE_FLAG): New macro (used by weakmap_add, weakmap_disclaim).
* tests/disclaim_weakmap_test.c (out_of_memory): Replace with
CHECK_OOM(p).
* tests/disclaim_weakmap_test.c (stat_added, stat_found, stat_removed,
stat_skip_marked): Change type from volatile AO_t to unsigned (because
it is accessed while holding the lock).
* tests/disclaim_weakmap_test.c (struct weakmap): Add weakobj_kind
field.
* tests/disclaim_weakmap_test.c (weakmap_lock, weakmap_trylock,
weakmap_unlock): No-op unless GC_PTHREADS.
* tests/disclaim_weakmap_test.c (weakmap_add): Call
GC_end_stubborn_change().
* tests/disclaim_weakmap_test.c (weakmap_add, weakmap_disclaim,
weakmap_new): Call GC_PTR_STORE_AND_DIRTY().
* tests/disclaim_weakmap_test.c (weakmap_new): Call pthread_mutex_init()
only if GC_PTHREADS.
* tests/disclaim_weakmap_test.c (weakmap_destroy): New function (which
calls pthread_mutex_destroy() if GC_PTHREADS).
* tests/disclaim_weakmap_test.c (_weakobj_free_list, _weakobj_kind):
Change global variable to local one declared in main().
* tests/disclaim_weakmap_test.c [TEST_MANUAL_VDB] (main): Call
GC_set_manual_vdb_allowed(1).
* tests/disclaim_weakmap_test.c [!NO_INCREMENTAL] (main): Call
GC_enable_incremental().
* tests/disclaim_weakmap_test.c (main): Call GC_init_finalized_malloc()
instead of multiple GC_register_displacement() calls; call
weakmap_destroy().
* tests/disclaim_weakmap_test.c [!GC_PTHREADS] (main): Call test() once.
* tests/tests.am (TESTS, check_PROGRAMS): Add disclaim_weakmap_test even
if no THREADS.
* tests/tests.am (disclaim_weakmap_test_SOURCES,
disclaim_weakmap_test_LDADD): Define even if no THREADS.

Update AUTHORS file

Update documentation about arm64 ABI in gcconfig.h
(fix of commit b399b13b9)

Issue #242 (bdwgc).

This minor patch makes the info on available arm64/aarch64 ABIs more
consistent.

* include/private/gcconfig.h (mach_type_known): Refine comment about
AARCH64.

Workaround 'identical inner return condition always true' cppcheck warning

* extra/msvc_dbg.c (GetModuleBase): Change if(dwAddrBase) to
if(dwAddrBase!=0).

Add copyright information about disclaim_weakmap_test source to README

* README.md (Copyright & Warranty): Add copyright information about
disclaim_weakmap_test.c file.

Add paths to filenames mentioned in the copyright section in README

* README.md (Copyright & Warranty): Add the path to each mentioned file.

Travis CI: Output content of disclaim_weak_test.log

Issue #239 (bdwgc).

.gitignore: Ignore disclaim_weakmap_test executable file

Add test using disclaim notifiers to implement a weak map

Issue #239 (bdwgc).

disclaim_weakmap_test is added.

* tests/disclaim_weakmap_test.c: New file.
* tests/tests.am [THREADS] (TESTS, check_PROGRAMS): Add
disclaim_weakmap_test.
* tests/tests.am [THREADS] (disclaim_weakmap_test_SOURCES,
disclaim_weakmap_test_LDADD): Define.

Check result of pthread_mutex_unlock in specific.c

* specific.c [USE_CUSTOM_SPECIFIC] (GC_setspecific,
GC_remove_specific_after_fork): Call ABORT if pthread_mutex_unlock()
fails.

New API function to get size of object debug header

GC_get_debug_header_size() is exported in addition to
GC_debug_header_size variable.  The usage of the latter is deprecated.

* dbg_mlc.c [CPPCHECK] (GC_start_debugging_inner): Call
GC_noop1(GC_debug_header_size) to suppress a cppcheck warning about
unused symbol.
* dbg_mlc.c (GC_debug_header_size): Add const.
* dbg_mlc.c (GC_get_debug_header_size): New API function definition.
* include/gc_config_macros.h (GC_ATTR_CONST): New macro.
* include/gc_mark.h (GC_debug_header_size): Add GC_ATTR_DEPRECATED and
const; update comment.
* include/gc_mark.h (GC_get_debug_header_size): New API public const
function declaration; move the comment from GC_debug_header_size.
* include/gc_mark.h (GC_USR_PTR_FROM_BASE): Use
GC_get_debug_header_size() instead of GC_debug_header_size.

Pass -Wall -Wextra -Wpedantic to g++ if supported (configure)

* configure.ac [$GCC=yes] (CXXFLAGS): Prepend -Wall $WEXTRA $WPEDANTIC.

Eliminate 'pointer targets differ in signedness' compiler warning (Win32)
(fix of commit b66a887d7)

* win32_threads.c [!GC_NO_THREADS_DISCOVERY] (GC_Thread_Rep.tm): Add
long_in_use field to union; add comment.
* win32_threads.c [!GC_NO_THREADS_DISCOVERY]
(GC_register_my_thread_inner): Pass pointer to long_in_use field
instead of a pointer to in_use one casted to word*; remove outdated
comment.

Update ChangeLog file (v8.0 changes)

Update ChangeLog file (v7.6 changes)
(a cherry-pick of commit 16cbc85d from 'release-7_6')

Update ChangeLog file (v7.2 - v7.4 changes only)
(a cherry-pick of commit 4bcd0c33 from 'release-7_4')

Fix memory allocation on GCF (Linux/x64)

Issue #225 (bdwgc).

GCF (Google Cloud Function) seems to have mmap("/dev/zero") operation
unsupported.  The workaround is to use mmap(MAP_ANONYMOUS).

* include/private/gcconfig.h [X86_64 && LINUX && __GLIBC__
&& !__UCLIBC__] (USE_MMAP_ANON): Define macro; add comment.

Fix 'USE_MUNMAP macro redefinition' error for NaCl
(fix of commit 1aabce0f9)

* include/private/gcconfig.h [I386 && NACL] (USE_MUNMAP): Remove macro
(as it is defined in configure/CMake by default since gc v8.0.0).

Remove extra USE_MMAP definition for Interix
(code refactoring)

* include/private/gcconfig.h [I386 && INTERIX && !USE_MMAP] (USE_MMAP):
Remove macro definition (because in gc v8.0.0+ it is defined later in this
file).

Call real pthread_sigmask instead of its wrapper in start_mark_threads
(fix of commit 95947bdc5)

The wrapper itself does not do anything useful in this case.

* pthread_support.c [PARALLEL_MARK && !NO_MARKER_SPECIAL_SIGMASK]
(GC_start_mark_threads_inner): Call REAL_FUNC(pthread_sigmask) instead
of pthread_sigmask.

Prevent a deadlock in suspend_thread and after process forking
(fix of commit 0c0e4cd)

Issue #235 (bdwgc).

* pthread_stop_world.c [GC_ENABLE_SUSPEND_THREAD] (GC_suspend_thread):
Remove unneeded comment for AO_store_release() call; invoke
GC_acquire_dirty_lock() and GC_release_dirty_lock() only if
GC_manual_vdb; add comment for GC_acquire_dirty_lock() call.
* pthread_stop_world.c [NACL] (GC_suspend_all): If GC_manual_vdb then
call GC_acquire_dirty_lock() and GC_release_dirty_lock() around the
code which ensures parking of threads.
* pthread_support.c [CAN_HANDLE_FORK] (fork_prepare_proc): Call
GC_acquire_dirty_lock().
* pthread_support.c [CAN_HANDLE_FORK] (fork_parent_proc,
fork_child_proc): Call GC_release_dirty_lock().

Use AO_or in async_set_pht_entry_from_index if available

* blacklst.c (backlist_set_pht_entry_from_index): New macro; move
comment from gc_priv.h.
* blacklst.c (GC_add_to_black_list_normal, GC_add_to_black_list_stack):
Use backlist_set_pht_entry_from_index() instead of
set_pht_entry_from_index_concurrent().
* include/private/gc_priv.h (set_pht_entry_from_index): Add outermost
parentheses; cast result to void.
* include/private/gc_priv.h [THREADS]
(set_pht_entry_from_index_concurrent): Define only if AO_HAVE_or;
update comment.
* include/private/gc_priv.h [THREADS] (GC_acquire_dirty_lock,
GC_release_dirty_lock): Define to no-op if
set_pht_entry_from_index_concurrent is defined.
* include/private/gc_priv.h [THREADS
&& set_pht_entry_from_index_concurrent] (GC_fault_handler_lock): Do not
declare.
* os_dep.c [!GC_DISABLE_INCREMENTAL && THREADS
&& set_pht_entry_from_index_concurrent]
(async_set_pht_entry_from_index): Redirect to
set_pht_entry_from_index_concurrent; do not define
GC_fault_handler_lock variable.
* os_dep.c [!GC_DISABLE_INCREMENTAL && THREADS
&& !set_pht_entry_from_index_concurrent && AO_HAVE_test_and_set_acquire]
(async_set_pht_entry_from_index): Remove GC_ATTR_NO_SANITIZE_THREAD
(because AO_HAVE_or should be defined in case of TSan).

Fix concurrent bitmap update in GC_dirty

Issue #235 (bdwgc).

* darwin_stop_world.c [!GC_NO_THREADS_DISCOVERY]
(GC_suspend_thread_list): Call GC_acquire_dirty_lock and
GC_release_dirty_lock around thread_suspend().
* darwin_stop_world.c (GC_stop_world): Likewise.
* include/private/gc_priv.h (set_pht_entry_from_index_safe): Remove
unused macro.
* include/private/gc_priv.h [THREADS] (GC_acquire_dirty_lock,
GC_release_dirty_lock): Define new macro; move comment from
win32_threads.c.
* include/private/gc_priv.h [THREADS && !GC_DISABLE_INCREMENTAL]
(GC_fault_handler_lock): Declare global variable (even if not
MPROTECT_VDB).
* os_dep.c [!GC_DISABLE_INCREMENTAL] (async_set_pht_entry_from_index):
Define even if not MPROTECT_VDB; reformat comments.
* os_dep.c [!GC_DISABLE_INCREMENTAL && AO_HAVE_test_and_set_acquire]
(GC_fault_handler_lock): Likewise.
* os_dep.c [THREADS && AO_HAVE_test_and_set_acquire]
(async_set_pht_entry_from_index): Use GC_acquire_dirty_lock and
GC_release_dirty_lock; remove wrong comment.
* os_dep.c [THREADS && !AO_HAVE_test_and_set_acquire]
(currently_updating, async_set_pht_entry_from_index): Remove incorrect
implementation.
* os_dep.c [!GC_DISABLE_INCREMENTAL] (GC_dirty_inner): Call
async_set_pht_entry_from_index instead of set_pht_entry_from_index;
remove FIXME.
* pthread_stop_world.c [GC_ENABLE_SUSPEND_THREAD] (GC_suspend_thread):
Refine comment for AO_store_release call; call GC_acquire_dirty_lock
and GC_release_dirty_lock around a block of RAISE_SIGNAL() and
sem_wait().
* pthread_stop_world.c [GC_OPENBSD_UTHREADS] (GC_suspend_all): Call
GC_acquire_dirty_lock and GC_release_dirty_lock around
pthread_suspend_np().
* pthread_stop_world.c [!GC_OPENBSD_UTHREADS] (GC_suspend_all): Add
comment.
* pthread_stop_world.c [!GC_OPENBSD_UTHREADS && !NACL] (GC_stop_world):
If GC_manual_vdb then call GC_acquire_dirty_lock and
GC_release_dirty_lock around a block of GC_suspend_all() and
suspend_restart_barrier(); add comment.
* win32_threads.c (GC_suspend): Use GC_acquire_dirty_lock and
GC_release_dirty_lock (regardless of MPROTECT_VDB).

Remove unused clear_pht_entry_from_index macro
(code refactoring)

* include/private/gc_priv.h (clear_pht_entry_from_index): Remove macro.

Refine documentation in gc_disclaim.h about closure object protection
(fix of commit 8ce6ef6)

* include/gc_disclaim.h (GC_register_disclaim_proc,
GC_finalized_malloc): Refine comment about the protection of the
finalizer closure object from collection.

Fix disclaim_test failure in case of GC_DEBUG
(fix of commit 21312a0)

* fnlz_mlc.c [ENABLE_DISCLAIM]: Include dbg_mlc.h.
* fnlz_mlc.c [ENABLE_DISCLAIM] (GC_init_finalized_malloc): Call
GC_register_displacement_inner(sizeof(oh)+FINALIZER_CLOSURE_FLAG).

Default to a single-threaded build for Nintendo, Orbis, Sony PSP targets
(fix of commits ce1f87461, 97182297e, d5dad58d3, cd63cf1e8)

* include/gc_config_macros.h [!GC_THREADS] (GC_THREADS): Do not check
SN_TARGET_ORBIS and SN_TARGET_PSP2 macros.
* include/private/gcconfig.h [X86_64 && SN_TARGET_ORBIS]: Do not
include pthread.h (should be included from gc_locks.h).
* include/private/gcconfig.h [NN_PLATFORM_CTR || NINTENDO_SWITCH
|| SN_TARGET_ORBIS || SN_TARGET_PS3 || SN_TARGET_PSP2] (THREADS):
Define only if GC_THREADS is defined.

Test marking of finalizer closure object in disclaim_test

* tests/disclaim_test.c (PTR_HASH): New macro.
* tests/disclaim_test.c (pair_dct): Change assertion condition about cd
(it should be equal to the hash value of p).
* tests/disclaim_test.c (pair_new): Replace static fc variable to local
pfc one which is assigned a pointer to atomic object; set pfc->cd to
the hash value of p.

Fix marking of finalizer closure object

* fnlz_mlc.c [ENABLE_DISCLAIM] (GC_init_finalized_malloc): Call
GC_register_displacement_inner(FINALIZER_CLOSURE_FLAG); add comment.
* fnlz_mlc.c [ENABLE_DISCLAIM] (GC_finalized_malloc): Call GC_dirty and
REACHABLE_AFTER_DIRTY after storing fclos.

Fix unneeded end_stubborn_change/ptr_store_and_dirty in disclaim_test
(fix of commits b52c140, 263ffbb)

* tests/disclaim_test.c (pair_dct): Add my_assert that cd is null;
store null to p->car (instead of storing cd and calling
GC_end_stubborn_change/GC_reachable_here).

Refine documentation in gc_disclaim.h

* include/gc_disclaim.h (GC_disclaim_proc, GC_register_disclaim_proc,
GC_finalized_malloc): Refine comment.

Fix comment typo in CMakeLists.txt

* CMakeLists.txt (CMAKE_USE_PTHREADS_INIT): Fix typo ("lib and includes")
in comment.

Specify register_disclaim_proc and finalized_malloc argument as non-null

Also, a check is added that the actual finalizer closure pointer does
not have FINALIZER_CLOSURE_FLAG set.

* fnlz_mlc.c (GC_register_disclaim_proc): Add assertion that proc is
non-null.
* fnlz_mlc.c (GC_finalized_malloc): Add assertions that fclos argument
is non-null and that fclos itself does not have FINALIZER_CLOSURE_FLAG
set.
* include/gc_disclaim.h (GC_register_disclaim_proc,
GC_finalized_malloc): Add GC_ATTR_NONNULL for the pointer argument.

Fix GC_VSNPRINTF in cordprnt for DJGPP and MS VC for WinCE
(fix of commit c10a1d900)

GC-internal DJGPP and MSWINCE macros are not available in cord.

* cord/cordprnt.c (GC_VSNPRINTF): Test __DJGPP__ instead of DJGPP macro.
* cord/cordprnt.c [_MSC_VER] (GC_VSNPRINTF): Test _WIN32_WCE instead
of MSWINCE macro.

Fix missing curses.h in cord/de when compiling manually (MS VC, MinGW)

* cord/tests/de.c [__MINGW32__ || __NT__ || _WIN32] (WIN32): Define.

Eliminate 'different const qualifiers' MS VC warnings in cordbscs
(fix of commit 2e7daad62)

* cord/cordbscs.c (CORD_cat_char_star, CORD_cat): Cast the first
argument of GC_PTR_STORE_AND_DIRTY() to void*.

Travis CI: Output content of disclaim_test.log

Bump libgc version (for development of 8.2 release)

* README.md: Restore build status badges (Travis, AppVeyor, Codecov,
Coveralls, Coverity, LGTM).
* README.md: Bump version to 8.1.0.
* configure.ac: Likewise.
* include/gc_version.h (GC_TMP_VERSION_MINOR): Likewise.

[8.0.0]

Bump gc version to 8.0.0 (experimental release)

* ChangeLog (8.0.0): Set release date.
* Makefile.am (LIBGC_VER_INFO): Increment revision (change version info
of libgc.so to 5:1:4).
* Makefile.am (LIBGCCPP_VER_INFO): Increment current and age (change
version info of libgccpp.so to 5:0:4).
* README.md: Bump major version (set minor and micro to 0).
* configure.ac (AC_INIT): Likewise.
* include/gc_version.h (GC_TMP_VERSION_MAJOR, GC_TMP_VERSION_MINOR,
GC_TMP_VERSION_MICRO): Likewise.
* README.md: Remove build status badges (Travis, AppVeyor, Codecov,
Coveralls, Coverity, LGTM).
* cord/cord.am (LIBCORD_VER_INFO): Increment current and age (change
version info of libcord.so to 5:0:4).

Update ChangeLog file

Really fix 'potential unsafe sign check of a bitwise operation' code defect
(fix of commit af00c4d)

* mark.c [!OS2] (GC_mark_from): Replace (signed_word)v>=0 to (v&SIGNB)==0
(anyway, the compiler generates the same code).

Add Codecov.io badge to README

Travis CI: Send code coverage reports to Codecov as well

Fix comment typos in backgraph.c, de.c, gcconfig.h

* ChangeLog (5.0alpha6): Fix typo ("DATASTART").
* include/private/gcconfig.h: Likewise.
* backgraph.c: Fix typo in comment ("If").
* cord/tests/de.c: Fix typo in comment ("Unbounded").

Replace some FIXME items with TODO ones
(code refactoring)

* alloc.c (GC_maybe_gc, GC_collect_a_little_inner,
GC_finish_collection): Replace FIXME item with TODO one.
* gcj_mlc.c (maybe_finalize): Likewise.
* include/gc.h [!GC_DEBUG || !__GNUC__] (GC_PTR_ADD): Likewise.
* include/private/gcconfig.h [X86_64 && LINUX && __GLIBC__
&& !__UCLIBC__] (GETCONTEXT_FPU_EXCMASK_BUG): Likewise.
* mach_dep.c (GC_with_callee_saves_pushed): Likewise.
* mark_rts.c (GC_push_current_stack): Likewise.
* misc.c [MSWIN32 || MSWINCE] (WRITE): Likewise.
* os_dep.c [ECOS] (ecos_gc_memory): Likewise.
* os_dep.c (GC_get_stack_base, GC_page_was_ever_dirty): Likewise.
* reclaim.c (GC_reclaim_clear): Likewise.
* include/private/gcconfig.h [OPENBSD && m68k]: Remove FIXME item.

Eliminate 'unused variable old_maps_size' compiler warning in get_maps
(fix of commit b3eee14)

* os_dep.c [NEED_PROC_MAPS] (GC_get_maps): Do not declare old_maps_size
local variable unless THREADS.

Remove MIN_WORDS macro from gc_priv.h
(code refactoring)

* include/private/gc_priv.h (MIN_WORDS): Move macro to test.c; remove
FIXME.
* tests/test.c: Update comment for include gc_priv.h.

Workaround 'bad pointer arithmetic' false waring in check_annotated_obj

* dbg_mlc.c [!SHORT_DBG_HDRS] (GC_check_annotated_obj): Change
(word*)ptr+ofs expressions to &((word*)ptr)[ofs].

Eliminate 'potential unsafe sign check of a bitwise operation' code defect

* mark.c [!OS2] (GC_mark_from): Cast mark_stack_top-mark_stack to word
first, and cast bitwise OR operation result to signed_word, so that not
to apply bitwise OR operation to the value of ptrdiff_t.

Eliminate 'comparison is always false' code defect in get_maps

In case of a single-threaded build, the comparison is always false
because maps_size>=0 and old_maps_size<=0.

* os_dep.c [NEED_PROC_MAPS] (GC_get_maps): Do not evaluate
maps_size<old_maps_size inside while expression if THREADS; remove
comment.

Eliminate 'poor global variable name' code defect in typd_mlc
(fix of commit a825a2d)

* typd_mlc.c (ld, ad, sd): Remove unused global variables.

Add LGTM.com code quality badges to README.md

Update AUTHORS file (add Demyan Kimitsa)

Fix start_world not resuming all threads on Darwin

Issue #231 (bdwgc).

This happens due mach thread ports are released in GC_stop_world as
a result in some cases the system creates new one and GC_start_world
will not find the thread to resume; in turn, the threads will stay
suspended.  When this happens to GDC threads, the application is
terminated as the message loop is halt.

The high-level description of the change: thread mach port is not
deallocated when thread is saved in GC_mach_threads as it causes thread
not being resumed as thread port object can be changed; threads are now
being suspended without check of suspend_count (as it can be suspended
by client); the logic of resume is changed, now the primary cycle
iterates threads to resume in GC_mach_threads.

* darwin_stop_world.c (struct GC_mach_thread): Rename already_suspended
filed to suspended.
* darwin_stop_world.c [!GC_NO_THREADS_DISCOVERY]
(GC_suspend_thread_list): Add my_task argument; remove info an outCount
local variables; call mach_port_deallocate uless threaded is added to
GC_mach_threads; do not call thread_info; update the relevant comments.
* darwin_stop_world.c [!GC_NO_THREADS_DISCOVERY] (GC_stop_world):
Remove i local variable; do not call mach_port_deallocate for prevlist
items; add comment.
* darwin_stop_world.c (GC_thread_resume): Call WARN instead of ABORT
if thread_resume failed.
* darwin_stop_world.c [!GC_NO_THREADS_DISCOVERY] (GC_start_world):
Initialize j to listcount; iterate over GC_mach_threads in the outer
loop; if thread is suspended then find it in act_list; if found then
resume thread; call mach_port_deallocate for act_list items.

Fix indentation of 'define GC_DATAEND' in gc.h
(fix of commit 4e24d219d)

* include/gc.h [__CYGWIN__ && !__x86_64__] (GC_DATAEND): Fix
indentation.

Travis CI: Fix missing semicolon at the end of GNU_DOWNLOAD_SITE assignment
(fix of commit a9690ac)

Update ChangeLog file (add v7.6.8 release date)

Travis CI: Put GNU S/W download base URL in a dedicated variable
(code refactoring)

Update ChangeLog file

Remove redundant checking of CPPCHECK macro in gc_cpp.h
(fix of commit 5e51e8d)

Issue #229 (bdwgc).

* include/gc_cpp.h [(_MSC_VER || __DMC__ || (__CYGWIN32__ || __CYGWIN__
|| __MINGW32__) && !GC_BUILD && !GC_NOT_DLL) && __cplusplus>201103L
&& GC_OPERATOR_NEW_ARRAY] (operator delete[](void*,size_t)): Define
even in case of CPPCHECK.

Fix delete operator redirection if gc_cpp is built as .dll (Cygwin, MinGW)

Issue #229 (bdwgc).

* include/gc_cpp.h [(__CYGWIN32__ || __CYGWIN__ || __MINGW32__)
&& !GC_BUILD && !GC_NOT_DLL && GC_OPERATOR_NEW_ARRAY] (operator new[],
operator delete[]): Define inline function.
* include/gc_cpp.h [(__CYGWIN32__ || __CYGWIN__ || __MINGW32__)
&& !GC_BUILD && !GC_NOT_DLL] (operator new, operator delete): Likewise.
* include/gc_cpp.h [_MSC_VER || __DMC__ || (__CYGWIN32__ || __CYGWIN__
|| __MINGW32__) && !GC_BUILD && !GC_NOT_DLL && __cplusplus>201103L]
(operator delete(void*,size_t)): Likewise.
* include/gc_cpp.h [_MSC_VER || __DMC__ || (__CYGWIN32__ || __CYGWIN__
|| __MINGW32__) && !GC_BUILD && !GC_NOT_DLL && __cplusplus>201103L
&& GC_OPERATOR_NEW_ARRAY && !CPPCHECK]
(operator delete[](void*,size_t)): Likewise.
* include/gc_cpp.h (operator new(size_t, int, const char*, int),
operator new[](size_t, int, const char*, int)): Do not define
for __DMC__.

Fix 'undefined reference to GC_incremental' linker error in pthread_start
(fix of commit 73d30d2)

GC_incremental is declared as static in case of NO_DEBUGGING.

* pthread_start.c [GC_PTHREADS && !GC_WIN32_THREADS]
(GC_inner_start_routine): Call GC_end_stubborn_change instead of
GC_dirty; add comment.

Use include gc.h with the angle brackets in the man page synopsis

* doc/gc.man (.TH): Update the date.
* doc/gc.man (SYNOPSIS): Replace include "gc.h" to include <gc.h>.

Travis CI: Use TEST_MANUAL_VDB instead of MANUAL_VDB

New API to turn on manual VDB at runtime

Manual VDB is now enabled by GC_set_manual_vdb_allowed(1) if called
before entering the GC incremental mode.

* alloc.c (GC_allocobj): Expand TRUE_INCREMENTAL macro.
* darwin_stop_world.c [MPROTECT_VDB] (GC_stop_world, GC_start_world):
Use GC_auto_incremental instead of GC_incremental.
* mark.c (alloc_mark_stack): Likewise.
* mark.c [PROC_VDB] (GC_push_all): Likewise.
* mark.c [!NEED_FIXUP_POINTER && THREADS && MPROTECT_VDB]
(GC_push_all_stack): Likewise.
* pthread_support.c [CAN_HANDLE_FORK && GC_DARWIN_THREADS
&& MPROTECT_VDB] (GC_atfork_prepare): Likewise.
* win32_threads.c [MPROTECT_VDB && !CYGWIN32]
(GC_register_my_thread_inner): Likewise.
* win32_threads.c [MPROTECT_VDB] (UNPROTECT_THREAD): Likewise.
* doc/gcdescr.md (Generational Collection and Dirty Bits): Update
documentation for the manual VDB.
* include/gc.h (GC_end_stubborn_change): Update comment.
* mark_rts.c (GC_push_all_stack_partially_eager): Likewise.
* include/gc.h (GC_set_manual_vdb_allowed, GC_get_manual_vdb_allowed):
New public function.
* include/private/gc_priv.h (GC_grungy_pages, GC_dirty_pages): Define
for all VDB modes.
* include/private/gc_priv.h (GC_auto_incremental, GC_manual_vdb):
Define.
* include/private/gc_priv.h [!GC_DISABLE_INCREMENTAL] (GC_dirty): Use
GC_manual_vdb instead of GC_incremental.
* include/private/gcconfig.h (GWW_VDB, MPROTECT_VDB, PCR_VDB): Do not
undefine if MANUAL_VDB.
* mallocx.c (GC_generic_malloc_many): Always allocate a single object
(and call GC_dirty_inner/REACHABLE_AFTER_DIRTY) if GC_manual_vdb.
* misc.c [!CAN_HANDLE_FORK && DARWIN && MPROTECT_VDB && !THREADS
&& !SMALL_CONFIG] (GC_set_handle_fork): Do not ABORT if GC_manual_vdb.
* misc.c [!SMALL_CONFIG] (manual_vdb_allowed): New static variable.
* misc.c [!SMALL_CONFIG] (GC_set_manual_vdb_allowed,
GC_get_manual_vdb_allowed): Implement.
* misc.c [!CHECKSUMS && !SMALL_CONFIG] (GC_init,
GC_enable_incremental): Set GC_manual_vdb and GC_incremental to true
if manual_vdb_allowed; do not call GC_dirty_init if manual_vdb_allowed.
* os_dep.c: Update comment about MANUAL_VDB.
* os_dep.c [MANUAL_VDB] (GC_dirty_init,
async_set_pht_entry_from_index): Remove.
* os_dep.c [!GC_DISABLE_INCREMENTAL] (GC_manual_vdb): Define global
variable.
* os_dep.c [!GC_DISABLE_INCREMENTAL] (GC_dirty_inner): Define
regardless of the VDB mode; add FIXME.
* os_dep.c [!GC_DISABLE_INCREMENTAL] (GC_read_dirty, GC_page_was_dirty,
GC_remove_protection): Implement for the case of GC_manual_vdb is true;
do not depend on MANUAL_VDB.
* tests/disclaim_test.c [TEST_MANUAL_VDB] (main): Call
GC_set_manual_vdb_allowed(1) before GC_INIT.
* tests/staticrootslib.c [TEST_MANUAL_VDB] (libsrl_init): Likewise.
* tests/test_cpp.cc [TEST_MANUAL_VDB] (main): Likewise.
* tests/test.c (INIT_MANUAL_VDB_ALLOWED): New macro.
* tests/test.c (GC_COND_INIT): Invoke INIT_MANUAL_VDB_ALLOWED (before
GC_OPT_INIT).
* tests/test.c [!SMALL_CONFIG] (main): Call GC_get_manual_vdb_allowed.

Update ChangeLog file (add v7.4.14 release date)

Update ChangeLog file (add v7.2l release date)

Update AUTHORS file

Initial single-threaded support of Interix subsystem

* include/private/gc_priv.h [__INTERIX] (_ALL_SOURCE): Define macro.
* include/private/gcconfig.h [__INTERIX] (I386, INTERIX,
mach_type_known): Likewise.
* include/private/gcconfig.h [I386 && INTERIX] (OS_TYPE, DATASTART,
DATAEND, STACKBOTTOM, USE_MMAP, USE_MMAP_ANON): Likewise.
* include/private/gcconfig.h [I386 && INTERIX] (_data_start__,
_bss_end__): Declare extern variable.

Update ChangeLog file

Update ChangeLog file (v7.6 changes)

Update ChangeLog file (v7.2 - v7.4 changes only)

Consistently use AS_HELP_STRING for configure new options
(code refactoring)

* configure.ac (thread-local-alloc, threads-discovery, mmap,
dynamic-loading, register-main-static-data, gcov): Replace deprecated
AC_HELP_STRING to AS_HELP_STRING.

Fix incorrect roots order after root removal in remove_roots_subregion
(fix of commits 38d194a, e849b45)

Issue #218 (bdwgc).

* mark_rts.c [USE_PROC_FOR_LIBRARIES] (swap_static_roots): New inline
function.
* mark_rts.c [USE_PROC_FOR_LIBRARIES] (GC_remove_roots_subregion):
Use swap_static_roots (after GC_add_roots_inner); if there is
a temporary root after GC_remove_root_at_pos then swap it with the
appropriate non-temporary one to ensure all temporary roots are
grouped at the end.

Fix the build for Emscripten
(part of commit 0f9ef2d from Unity-Technologies/bdwgc)

Issue #173 (bdwgc).

* mark_rts.c [!CPPCHECK && __GNUC__>=4] (GC_approx_sp): Do not use
__builtin_frame_address if STACK_NOT_SCANNED.

Fix the build for N3DS
(part of commit 0f9ef2d from Unity-Technologies/bdwgc)

Issue #173 (bdwgc).

* include/gc.h [GC_BUILD && NN_PLATFORM_CTR] (GC_on_thread_event_proc):
Define type.
* include/private/gc_locks.h [NN_PLATFORM_CTR || NINTENDO_SWITCH]
(GC_lock, GC_unlock): Declare function.
* include/private/gc_locks.h [NN_PLATFORM_CTR || NINTENDO_SWITCH]
(UNCOND_LOCK, UNCOND_UNLOCK): Define macro.
* include/private/gc_priv.h [THREADS && !SN_TARGET_ORBIS
&& !SN_TARGET_PSP2]: Do not include gc_atomic_ops.h if NN_PLATFORM_CTR.
* pthread_support.c [USE_SPIN_LOCK || !NO_PTHREAD_TRYLOCK] (GC_pause):
Call GC_noop1 instead of AO_compiler_barrier unless AO_CLEAR defined.