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10 Commits

Author SHA1 Message Date
Torvald Riegel 31772c9507 libitm: Add multi-lock, write-through TM method. 
libitm/
	* libitm_i.h (GTM::gtm_rwlog_entry): New.
	(GTM::gtm_thread): Add read and write logs.
	(GTM::dispatch_ml_wt): Declare.
	* retry.cc (parse_default_method): Support ml_wt.
	* method-ml.cc: New file.
	* Makefile.am: Add method-ml.cc.
	* Makefile.in: Regenerate.

From-SVN: r184212
 2012-02-14 13:14:27 +00:00
Torvald Riegel 07b6642b93 libitm: Filter out undo writes that overlap with the libitm stack. 
PR libitm/51855
	* config/generic/tls.h (GTM::mask_stack_top): New.
	(GTM::mask_stack_bottom): Declare.
	* config/generic/tls.c (GTM::mask_stack_bottom): New.
	* local.cc (gtm_undolog::rollback): Filter out any updates that
	overlap the libitm stack.  Add current transaction as parameter.
	* libitm_i.h (GTM::gtm_undolog::rollback): Adapt.
	* beginend.cc (GTM::gtm_thread::rollback): Adapt.
	* testsuite/libitm.c/stackundo.c: New test.

From-SVN: r183172
 2012-01-13 23:45:06 +00:00
Richard Henderson 8377e5e546 libitm_i.h (_Unwind_DeleteException): Declare weak. 
* libitm_i.h (_Unwind_DeleteException): Declare weak.
	* eh_cpp.cc (_Unwind_DeleteException): Define for
	!HAVE_ELF_STYLE_WEAKREF.

From-SVN: r183049
 2012-01-09 19:16:07 -08:00
Torvald Riegel 11f30bb0e4 libitm: Optimize undo log. 
libitm/
	* local.cc (GTM_LB): Use GTM::gtm_undolog.
	(GTM::gtm_thread::drop_references_undolog): Remove.
	(GTM::gtm_thread::commit_undolog,
	GTM::gtm_thread::rollback_undolog): Move to ...
	* libitm_i.h (GTM::gtm_undolog): ...here. New.
	(GTM::gtm_undolog_entry): Remove.
	(GTM::gtm_thread): Adapt.
	* beginend.cc (GTM::gtm_thread::rollback): Adapt.
	(GTM::gtm_thread::trycommit): Adapt.
	* method-serial.cc (serial_dispatch::log): Adapt.
	* method-gl.cc (gl_wt_dispatch::pre_write): Adapt.
	(gl_wt_dispatch::store): Fix likely/unlikely.
	* containers.h (GTM::vector::resize): Add additional_capacity
	parameter and handle it.
	(GTM::vector::resize_noinline): New/adapt.
	(GTM::vector::push): New.

From-SVN: r182992
 2012-01-08 14:13:49 +00:00
Torvald Riegel 610e390135 libitm: Fix privatization safety during upgrades to serial mode. 
libitm/
	* beginend.cc (GTM::gtm_thread::restart): Add and handle
	finish_serial_upgrade parameter.
	* libitm.h (GTM::gtm_thread::restart): Adapt declaration.
	* config/linux/rwlock.cc (GTM::gtm_rwlock::write_lock_generic):
	Don't unset reader flag.
	(GTM::gtm_rwlock::write_upgrade_finish): New.
	* config/posix/rwlock.cc: Same.
	* config/linux/rwlock.h (GTM::gtm_rwlock::write_upgrade_finish):
	Declare.
	* config/posix/rwlock.h: Same.
	* method-serial.cc (GTM::gtm_thread::serialirr_mode): Unset reader
	flag after commit or after rollback when restarting.

From-SVN: r182675
 2011-12-24 01:42:35 +00:00
Richard Henderson 36cfbee133 libitm: Conversion to c++11 atomics. 
* local_atomic: New file.
        * libitm_i.h: Include it.
        (gtm_thread::shared_state): Use atomic template.
        * beginend.cc (GTM::gtm_clock): Use atomic template.
        (global_tid): Use atomic template if 64-bit atomics available.
        (gtm_thread::gtm_thread): Update shared_state access.
        (gtm_thread::trycommit): Likewise.
        (choose_code_path): Update global_tid access.
        * method-gl.cc (gl_mg::orec): Use atomic template.  Update all users.
        * stmlock.h (GTM::gtm_clock): Use atomic template.
        (gtm_get_clock, gtm_inc_clock): Update accesses.
        * config/linux/rwlock.cc (gtm_rwlock::read_lock): Remove
        redundant __sync_synchronize after atomic shared_state access.
        * config/posix/rwlock.cc (gtm_rwlock::read_lock): Likewise.
        (gtm_rwlock::write_lock_generic): Likewise.
        (gtm_rwlock::read_unlock): Likewise.
        * config/alpha/target.h (atomic_read_barrier): Remove.
        (atomic_write_barrier): Remove.
        * config/x86/target.h (atomic_read_barrier): Remove.
        (atomic_write_barrier): Remove.

From-SVN: r182294
 2011-12-13 11:11:25 -08:00
Richard Henderson 062f93f255 Swap the action and jmpbuf arguments to GTM_longjmp 
On several ABIs, the first register parameter is the same as
the return value register.  Moving the action parameter first
avoids the need for register shuffling on these targets.

        * libitm_i.h (GTM_longjmp): Swap first and second arguments.
        * beginend.c (_ITM_abortTransaction): Update to match.
        (GTM::gtm_thread::restart): Likewise.
        * config/alpha/sjlj.S (GTM_longjmp): Likewise.
        * config/x86/sjlj.S (GTM_longjmp): Likewise.

From-SVN: r181863
 2011-11-30 14:29:33 -08:00
Iain Sandoe 0b41ebef72 sjlj.S (CONCAT1, [...]): Respond to __USER_LABEL_PREFIX__ for targets that use it. 
libitm:

	* config/x86/sjlj.S (CONCAT1, CONCAT2, SYM): Respond to
	__USER_LABEL_PREFIX__ for targets that use it.
	TYPE, SIZE, HIDDEN): New macros to assist on non-elf targets.
	(_ITM_beginTransaction): Use SYM, TYPE, SIZE macros to assist
	in portability to non-elf targets.
	(GTM_longjmp): LIkewise.
	* libitm_i.h (begin_transaction): Apply __USER_LABEL_PREFIX__
	where required.

From-SVN: r181612
 2011-11-22 09:57:19 +00:00
Richard Henderson 79b1edb6b5 libitm: Remove unused code. 
In particular, unused code that's presenting portability problems.

From-SVN: r181241
 2011-11-09 14:54:55 -08:00
Aldy Hernandez 0a35513e4e Merge from transactional-memory branch. 
From-SVN: r181154
 2011-11-08 11:13:41 +00:00