Ivan Maidanski [Wed, 2 Aug 2017 08:13:23 +0000 (11:13 +0300)]
Fix bytes count passed to add_to_our_memory in backgraph new_back_edges
(fix commit 180b56c)
* backgraph.c [MAKE_BACK_GRAPH] (new_back_edges): Pass bytes_to_get to
GC_add_to_our_memory() (i.e. pass the same number of bytes as passed
to GET_MEM() even in case of MMAP_SUPPORTED).
Ivan Maidanski [Fri, 14 Jul 2017 08:11:13 +0000 (11:11 +0300)]
Fix SIGSEGV in GC_is_marked when gc_cleanup is used in leak-finding mode
(Cherry-pick commit b1905d6 from 'release-7_4' branch.)
Issue #162 (bdwgc).
Now finalizers and disappearing links registration is a no-op in case
of the leak-finding mode.
* finalize.c (GC_register_disappearing_link): Do nothing (return
GC_UNIMPLEMENTED) if GC_find_leak.
* finalize.c (GC_register_finalizer_inner): Do nothing if GC_find_leak.
* include/gc.h (GC_find_leak): More verbose comment.
* include/gc.h (GC_debug_register_finalizer,
GC_general_register_disappearing_link): Document the case of
GC_find_leak.
Ivan Maidanski [Tue, 11 Jul 2017 23:04:30 +0000 (02:04 +0300)]
Fix push_complex_descriptor to avoid unlimited global mark stack growth
(Cherry-pick commits c18ff9a, 4781c6d from 'release-7_4' branch.)
Global mark stack should not grow in parallel marker mode (as
fixed-size local_mark_stack is used instead).
* typd_mlc.c [PARALLEL_MARK] (GC_array_mark_proc): Do not set
GC_mark_stack_too_small if GC_parallel (and new_mark_stack_ptr is
null) unless mark_stack_limit belongs to the global mark stack; add
comment.
Ivan Maidanski [Tue, 13 Jun 2017 18:31:52 +0000 (21:31 +0300)]
Update Download information in GC overview document
(Cherry-pick commit b7c9e51 from 'release-7_4' branch.)
* doc/overview.html: Change Download page link to that on GitHub; add
BDWGC acronym; remove link to gc.tar.gz; recommend to download
"recent stable" version; remove link to ancient boehm-gc in gcc;
provide link to the list of changes (for each version).
Ivan Maidanski [Tue, 6 Jun 2017 07:30:50 +0000 (10:30 +0300)]
Update documentation about bugs reporting and new releases notification
(Cherry-pick commit 1bacdb3 from 'release-7_4' branch.)
* doc/README (Download): Add link to BDWGC Download page on GitHub.
* doc/README (Overview): Change link (for the further information) from
hboehm.info/gc to doc/overview.html.
* configure.ac (AC_INIT): Change URI for reporting bugs.
* doc/README: Likewise.
* doc/gc.man (SEE ALSO): Add link to the BDWGC main page on GitHub.
* doc/gcdescr.html: Remove information how to provide feedback.
* doc/overview.html (Contacts and Mailing List): Update information
(recommend use of GitHub and Stack Overflow, provide links to the
archives of the former mailing lists).
Ivan Maidanski [Fri, 16 Jun 2017 07:45:02 +0000 (10:45 +0300)]
Update GCJ link in documentation
* doc/gcdescr.html: Replace http://gcc.gnu.org/java link (which now
points to GCC itself) with https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcj/
one.
* doc/overview.html: Likewise.
Hamayama [Tue, 20 Jun 2017 21:30:24 +0000 (00:30 +0300)]
Fix typed_test to prevent fails in malloc_explicitly_typed (64-bit)
Issue #166 (bdwgc).
* tests/test.c (typed_test): Pass 320*sizeof(word)+some_number instead
of 2000 to GC_malloc_explicitly_typed, so that to satisfy the size
argument requirement of the latter regardless of word size).
Fall back to AC_CHECK_HEADER-based detection of libatomic_ops library
if PKG_CHECK_MODULES failed to find the library.
* configure.ac [missing_libatomic_ops=true]: Call
AC_CHECK_HEADER(atomic_ops.h) and set missing_libatomic_ops=false if
atomic_ops.h is found; add comment.
Ivan Maidanski [Sun, 1 Sep 2013 16:06:38 +0000 (20:06 +0400)]
Prevent misleading AC_MSG_ERROR/AS_IF errors reported in configure.ac
(Cherry-pick commit 29952ea from 'release-7_4' branch.)
* configure.ac (PKG_CHECK_MODULES): Move AS_IF and AC_MSG_ERROR out of
ACTION-IF-NOT-FOUND argument (setting "missing_libatomic_ops" variable
instead) to prevent misleading
"possibly undefined macro: AC_MSG_ERROR, AS_IF" error reported by
Autoconf (pointing to code lines where these macros first occur) in
case of PKG_CHECK_MODULES is not defined in aclocal.m4; add comment
about missing Autotools pkg.m4 file.
Ivan Maidanski [Tue, 11 Apr 2017 07:28:44 +0000 (10:28 +0300)]
Update shared libraries version info (v7.2)
* Makefile.am (libgc_la_LDFLAGS): Change version info to 2:0:0
(there are some incompatible API changes since the last change of the
info, e.g. in GC_set_warn_proc, so the "current" part of the info is
incremented).
* Makefile.am (libgccpp_la_LDFLAGS): Change version info to 1:4:0
(only the library implementation has changes since the last change of
the info).
* cord/cord.am (libcord_la_LDFLAGS): Likewise.
Ivan Maidanski [Tue, 14 Mar 2017 22:58:41 +0000 (01:58 +0300)]
Fix GC_SIZE_MAX definition (Linux/musl-gcc)
(Cherry-pick commit f40fab8 from 'release-7_6' branch.)
* include/private/gc_priv.h [SIZE_MAX] (GC_SIZE_MAX): Cast
SIZE_MAX to size_t explicitly (to workaround incorrect definition
of SIZE_MAX - e.g. it is defined as ~0ULL in musl-tools which is not
correct for a 32-bit target).
Ivan Maidanski [Tue, 31 Jan 2017 23:30:18 +0000 (02:30 +0300)]
Fix enable_parallel_mark condition in CMake script
* CMakeLists.txt [enable_parallel_mark] (ADD_DEFINITIONS): Add
-DPARALLEL_MARK; remove ADD_DEFINITIONS("-DPARALLEL_MARK") in other
places; remove ${} for enable_parallel_mark in IF.
Ivan Maidanski [Thu, 22 Dec 2016 21:39:10 +0000 (00:39 +0300)]
Fix bm_huge initialization for 64-bit targets (gctest)
(Cherry-pick commit 5bfdba6 from 'release-7_4' branch.)
* tests/test.c (bm_huge): Make array size depend on word size
(5 elements for 64-bit targets); initialize elements (except the last
one) to -1 instead of 0xffffffff (so that all bits are ones even on
a 64-bit target); initialize last element to ((word)-1)>>8 instead of
0x00ffffff value.
* tests/test.c (typed_test): Fail if bm_huge descriptor contains wrong
bit values at certain positions (as it had before this fix).
Ivan Maidanski [Sat, 10 Dec 2016 07:37:04 +0000 (10:37 +0300)]
Fix GC_mark_stack_top assertion violation properly in mark_local
(Cherry-pick commit 5065df5 from 'release-7_4' branch.)
* mark.c (GC_mark_local): Remove assertion checking that
global_first_nonempty is not greater than GC_mark_stack_top+1 (because
global_first_nonempty could be bigger slightly more at some moments due
to concurrency between the markers); replace n_on_stack==0 with
my_top<my_first_nonempty (the latter is equivalent to
(signed_word)n_on_stack<=0).
Ivan Maidanski [Sat, 10 Dec 2016 07:14:39 +0000 (10:14 +0300)]
Fix assertion in GC_steal_mark_stack for non-heap regions
(Cherry-pick commit 8f35a9e from 'release-7_4' branch.)
* mark.c (GC_steal_mark_stack): Replace top->mse_descr.w with descr
in assertion; relax assertion condition for descr (length-containing
mse_descr.w could be larger than the current GC heap size if
mse_start points to a region in a stack or a program data root;
e.g. it could happen if MemorySanitizer is used).
Ivan Maidanski [Fri, 9 Dec 2016 23:19:32 +0000 (02:19 +0300)]
Fix gc_cleanup destructor for non-heap objects (gc_cpp)
(Cherry-pick commit 992e7cd from 'release-7_4' branch.)
* include/gc_cpp.h (gc_cleanup::~gc_cleanup): If GC_base(this) returns
null (could be if the object is not allocated dynamically) then do not
call GC_register_finalizer_ignore_self.
Ivan Maidanski [Wed, 7 Dec 2016 08:32:30 +0000 (11:32 +0300)]
Fix '~' operator application to unsigned values shorter than word
(Cherry-pick commit 7f6b5de from 'release-7_4' branch.)
Without the fix, unsigned result of "~" operator is zero-extended
to a wide type (word) thus the result has leading zeros (which is
not expected to be).
* mark.c (GC_mark_from): Cast (sizeof(word)-1) to word before "~"
operation.
* mark_rts.c (GC_add_roots_inner, GC_exclude_static_roots): Likewise.
* mark_rts.c [!MSWIN32 && !MSWINCE && !CYGWIN32]
(GC_remove_roots_inner): Likewise.
* os_dep.c [SVR4 || AUX || DGUX || LINUX && SPARC]
(GC_SysVGetDataStart): Likewise.
* os_dep.c [!MSWIN32 && DATASTART_USES_BSDGETDATASTART]
(GC_FreeBSDGetDataStart): Likewise.
* dyn_load.c [(MSWIN32 || MSWINCE || CYGWIN32) && !GC_WIN32_THREADS]
(GC_cond_add_roots): Cast (dwAllocationGranularity-1) to word before
"~" operation.
* include/private/gc_priv.h (HBLKPTR): Cast (HBLKSIZE-1) to word
before "~" operation.
* os_dep.c [USE_WINALLOC || CYGWIN32] (GC_win32_get_mem): Likewise.
* mark.c (GC_mark_from): Change type of new_size local variable from
int to word.
* os_dep.c [OPENBSD] (GC_find_limit_openbsd, GC_skip_hole_openbsd):
Change type of pgsz local variable from size_t to word (to avoid
implicit unsigned value extension after "~" operation).
* os_dep.c [PROC_VDB] (GC_read_dirty): Cast (sizeof(long)-1) to word
before "~" operation.
Ivan Maidanski [Mon, 5 Dec 2016 21:49:33 +0000 (00:49 +0300)]
Fix potential data race in GC_SysVGetDataStart (SPARC)
(Cherry-pick commit 9562745
* os_dep.c [SVR4 || AUX || DGUX || LINUX && SPARC]
(GC_SysVGetDataStart): Use AO_fetch_and_add(p,0) if available instead
of non-atomic read/write in *p = *p statement (thus, to avoid data race
though it is highly unlikely).
Ivan Maidanski [Mon, 19 Dec 2016 21:54:32 +0000 (00:54 +0300)]
Fix storage class of local variable in register_dynamic_libraries (Irix)
* dyn_load.c [IRIX5 || USE_PROC_FOR_LIBRARIES && !LINUX]
(GC_register_dynamic_libraries): Remove "static" for needed_sz local
variable (and initialize it to zero).
Because it breaks gctest "list reversal" if compiled with
GC_GCJ_SUPPORT for MinGW/x86. This is caused by the fact that static
data roots could be between two GC heap regions thus GC with the patch
skips scanning of a reachable GCJ object with a descriptor located in
the static data roots.
To fix the issue (#92) of mistaking the free list pointers in free
objects for being type descriptor pointers, another approach should be
taken (e.g. marking objects in free lists).
Ivan Maidanski [Wed, 11 Jan 2017 08:26:11 +0000 (11:26 +0300)]
Fix gc_backptr.h, gc_mark.h, GC_DS_TAGS names in documentation
(Cherry-pick commit d4eb7ca from 'release-7_6' branch.)
* doc/debugging.html: Rename backptr.h to gc_backptr.h.
* include/gc_mark.h (GC_DS_PER_OBJECT): Rename DS_TAGS to GC_DS_TAGS in
the comment.
* include/private/gc_priv.h (hblkhdr.hb_descr): Rename mark.h to
gc_mark.h in the comment.
Ivan Maidanski [Wed, 23 Nov 2016 01:47:19 +0000 (04:47 +0300)]
Fix Solaris/sparc detection in case of strict C compliance is enforced
* include/gc_config_macros.h [__i386__ || __amd64__] (GC_SOLARIS_THREADS):
Define also if __sun is defined (treat __sun as a synonym to sun).
* include/private/gcconfig.h [__i386__ || __amd64] (SOLARIS):
Likewise.
* include/gc_config_macros.h [sun] (GC_SOLARIS_THREADS): Define also
if __amd64 is defined (treat __amd64 as a synonym to __amd64__).
* include/gc_config_macros.h [sparc && unix] (DRSNX): Do not define if
SPARC and SOLARIS are already defined.
Ivan Maidanski [Sat, 19 Nov 2016 17:37:04 +0000 (20:37 +0300)]
Fix assertion violation in GC_repeat_read if --enable-redirect-malloc
(Cherry-pick commit aed7ec5 from 'release-7_6' branch.)
* malloc.c [REDIRECT_MALLOC && GC_LINUX_THREADS] (GC_init_lib_bounds):
Declare cancel_state local variable; DISABLE_CANCEL for GC_text_mapping
(because GC_repeat_read expects the cancellation state off); call
RESTORE_CANCEL on return.
Ivan Maidanski [Fri, 18 Nov 2016 14:16:32 +0000 (17:16 +0300)]
Ensure oom_fn callback executed on out-of-memory in calloc
(Cherry-pick commit 80f428f from 'release-7_6' branch.)
* malloc.c [REDIRECT_MALLOC] (calloc):
Call oom_fn(SIZE_MAX) (instead of returning NULL) if n*lb overflows.
* typd_mlc.c (GC_calloc_explicitly_typed): Likewise.
* typd_mlc.c (GC_calloc_explicitly_typed): If register_disappearing_link
failed due to lack of memory then call oom_fn(lb) instead of
GC_malloc(lb); update comment.
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