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Jonathan Wakely e2fc12a5da libstdc++: Fix unintended layout change to std::basic_filebuf [PR108331] 
GCC 13 has a new implementation of gthr-win32.h which supports C++11
mutexes, threads etc. but this causes an unintended ABI break. The
__gthread_mutex_t type is always used in std::basic_filebuf even in
C++98, so independent of whether C++11 sync primitives work or not.
Because that type changed for the win32 thread model, we have a layout
change in std::basic_filebuf. The member is completely unused, it just
gets passed to the std::__basic_file constructor and ignored. So we
don't need that mutex to actually work, we just need its layout to not
change.

Introduce a new __gthr_win32_legacy_mutex_t struct in gthr-win32.h with
the old layout, and conditionally use that in std::basic_filebuf.

	PR libstdc++/108331

libgcc/ChangeLog:

	* config/i386/gthr-win32.h (__gthr_win32_legacy_mutex_t): New
	struct matching the previous __gthread_mutex_t struct.
	(__GTHREAD_LEGACY_MUTEX_T): Define.

libstdc++-v3/ChangeLog:

	* config/io/c_io_stdio.h (__c_lock): Define as a typedef for
	__GTHREAD_LEGACY_MUTEX_T if defined.
2023-01-13 13:34:20 +00:00
..
config libstdc++: Fix unintended layout change to std::basic_filebuf [PR108331] 2023-01-13 13:34:20 +00:00
soft-fp middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
ChangeLog Daily bump. 2023-01-08 00:16:59 +00:00
config.host Reimplement GNU threads library on native Windows 2022-12-23 23:58:06 +00:00
config.in gcov: use mmap pools for KVP. 2021-03-03 14:21:45 +01:00
configure gcc: Add 'mcf' thread model support from mcfgthread 2022-10-19 13:52:37 +00:00
configure.ac LoongArch Port: libgcc 2022-03-29 17:43:35 +08:00
crtstuff.c libgcc: Align __EH_FRAME_BEGIN__ to pointer size 2022-06-01 15:19:59 -07:00
dfp-bit.c Update copyright years. 2022-01-03 10:42:10 +01:00
dfp-bit.h Update copyright years. 2022-01-03 10:42:10 +01:00
divmod.c Update copyright years. 2022-01-03 10:42:10 +01:00
emutls.c Update copyright years. 2022-01-03 10:42:10 +01:00
enable-execute-stack-empty.c
enable-execute-stack-mprotect.c Update copyright years. 2022-01-03 10:42:10 +01:00
find-symver.awk Update copyright years. 2022-01-03 10:42:10 +01:00
fixed-bit.c Update copyright years. 2022-01-03 10:42:10 +01:00
fixed-bit.h Update copyright years. 2022-01-03 10:42:10 +01:00
fixed-obj.mk
floatunsidf.c
floatunsisf.c
floatunsitf.c
floatunsixf.c
fp-bit.c Update copyright years. 2022-01-03 10:42:10 +01:00
fp-bit.h Update copyright years. 2022-01-03 10:42:10 +01:00
gbl-ctors.h Update copyright years. 2022-01-03 10:42:10 +01:00
gcov.h gcov: Add __gcov_filename_to_gcfn() 2022-04-28 20:46:49 +02:00
gen-fixed.sh
generic-morestack-thread.c Update copyright years. 2022-01-03 10:42:10 +01:00
generic-morestack.c Update copyright years. 2022-01-03 10:42:10 +01:00
generic-morestack.h Update copyright years. 2022-01-03 10:42:10 +01:00
gstdint.h
gthr-posix.h Update copyright years. 2022-01-03 10:42:10 +01:00
gthr-single.h Update copyright years. 2022-01-03 10:42:10 +01:00
gthr.h Update copyright years. 2022-01-03 10:42:10 +01:00
libgcc-std.ver.in Update copyright years. 2022-01-03 10:42:10 +01:00
libgcc2.c Always define WIN32_LEAN_AND_MEAN before <windows.h> 2023-01-07 06:51:06 +00:00
libgcc2.h Update copyright years. 2022-01-03 10:42:10 +01:00
libgcov-driver-system.c gcov: Add open mode parameter to gcov_do_dump() 2022-04-28 20:46:49 +02:00
libgcov-driver.c gcov: rename gcov_write_summary 2022-10-12 10:53:19 +02:00
libgcov-interface.c Update copyright years. 2022-01-03 10:42:10 +01:00
libgcov-merge.c Update copyright years. 2022-01-03 10:42:10 +01:00
libgcov-profiler.c Update copyright years. 2022-01-03 10:42:10 +01:00
libgcov-util.c gcov: Use xstrerror() 2022-04-28 20:46:50 +02:00
libgcov.h gcov: rename gcov_write_summary 2022-10-12 10:53:19 +02:00
Makefile.in libgcc: Quote variable in Makefile.in 2022-10-18 12:09:53 +01:00
memcmp.c
memcpy.c
memmove.c
memset.c
mkheader.sh Update copyright years. 2022-01-03 10:42:10 +01:00
mkmap-flat.awk Update copyright years. 2022-01-03 10:42:10 +01:00
mkmap-symver.awk Update copyright years. 2022-01-03 10:42:10 +01:00
offloadstuff.c Update copyright years. 2022-01-03 10:42:10 +01:00
shared-object.mk
siditi-object.mk
static-object.mk
sync.c Update copyright years. 2022-01-03 10:42:10 +01:00
udivhi3.c Update copyright years. 2022-01-03 10:42:10 +01:00
udivmod.c Update copyright years. 2022-01-03 10:42:10 +01:00
udivmodhi4.c Update copyright years. 2022-01-03 10:42:10 +01:00
udivmodsi4.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-arm-common.inc Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-c.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-compat.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-compat.h Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-dw2-btree.h Remove dependency on uintptr_t in libgcc 2022-09-18 11:34:39 +02:00
unwind-dw2-execute_cfa.h libgcc: Specialize execute_cfa_program in DWARF unwinder for alignments [redo] 2023-01-03 16:47:32 +01:00
unwind-dw2-fde-compat.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-dw2-fde-dip.c libgcc: Special-case BFD ld unwind table encodings in find_fde_tail 2022-11-04 10:18:03 +01:00
unwind-dw2-fde.c initialize fde objects lazily 2022-12-17 00:48:25 +01:00
unwind-dw2-fde.h eliminate mutex in fast path of __register_frame 2022-09-17 00:58:14 +02:00
unwind-dw2.c libgcc: Specialize execute_cfa_program in DWARF unwinder for alignments [redo] 2023-01-03 16:47:32 +01:00
unwind-dw2.h libgcc: Move cfa_how into potential padding in struct frame_state_reg_info 2022-10-17 11:09:17 +02:00
unwind-generic.h Always define WIN32_LEAN_AND_MEAN before <windows.h> 2023-01-07 06:51:06 +00:00
unwind-pe.h Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-seh.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind-sjlj.c Update copyright years. 2022-01-03 10:42:10 +01:00
unwind.inc x86: Check corrupted return address when unwinding stack 2022-10-17 14:21:47 -07:00
vtv_end.c Update copyright years. 2022-01-03 10:42:10 +01:00
vtv_end_preinit.c Update copyright years. 2022-01-03 10:42:10 +01:00
vtv_start.c Update copyright years. 2022-01-03 10:42:10 +01:00
vtv_start_preinit.c Update copyright years. 2022-01-03 10:42:10 +01:00