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libitm.h
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/* Copyright (C) 2008-2021 Free Software Foundation, Inc.
Contributed by Richard Henderson <[email protected]>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* The external interface of this library follows the specification described
in version 1 of http://www.intel.com/some/path/here.pdf. */
#ifndef LIBITM_H
#define LIBITM_H 1
#include <stddef.h>
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __i386__
/* Only for 32-bit x86. */
# define ITM_REGPARM __attribute__((regparm(2)))
#else
# define ITM_REGPARM
#endif
#define ITM_NORETURN __attribute__((noreturn))
#define ITM_PURE __attribute__((transaction_pure))
#ifdef _GLIBCXX_NOTHROW
# define _ITM_NOTHROW _GLIBCXX_NOTHROW
#elif !defined (__cplusplus)
# define _ITM_NOTHROW __attribute__((__nothrow__))
#elif __cplusplus < 201103L
# define _ITM_NOTHROW throw ()
#else
# define _ITM_NOTHROW noexcept
#endif
/* The following are externally visible definitions and functions, though
only very few of these should be called by user code. */
/* Values used as arguments to abort. */
typedef enum {
userAbort = 1,
userRetry = 2,
TMConflict= 4,
exceptionBlockAbort = 8,
outerAbort = 16
} _ITM_abortReason;
/* Arguments to changeTransactionMode */
typedef enum
{
modeSerialIrrevocable,
} _ITM_transactionState;
/* Results from inTransaction */
typedef enum
{
outsideTransaction = 0, /* So "if (inTransaction(td))" works */
inRetryableTransaction,
inIrrevocableTransaction
} _ITM_howExecuting;
/* Values to describe properties of code, passed in to beginTransaction.
Some of these constants are duplicated in some of the ITM_beginTransaction
implementations, so update those too when applying any changes. */
typedef enum
{
pr_instrumentedCode = 0x0001,
pr_uninstrumentedCode = 0x0002,
pr_multiwayCode = pr_instrumentedCode | pr_uninstrumentedCode,
/* Called pr_hasNoXMMUpdate in the Intel document, used for
avoiding vector register save/restore for any target. */
pr_hasNoVectorUpdate = 0x0004,
pr_hasNoAbort = 0x0008,
/* Not present in the Intel document, used for avoiding
floating point register save/restore for any target. */
pr_hasNoFloatUpdate = 0x0010,
pr_hasNoIrrevocable = 0x0020,
pr_doesGoIrrevocable = 0x0040,
pr_aWBarriersOmitted = 0x0100,
pr_RaRBarriersOmitted = 0x0200,
pr_undoLogCode = 0x0400,
pr_preferUninstrumented = 0x0800,
/* Exception blocks are not used nor supported. */
pr_exceptionBlock = 0x1000,
pr_hasElse = 0x2000,
pr_readOnly = 0x4000,
pr_hasNoSimpleReads = 0x400000,
/* These are not part of the ABI but used for custom HTM fast paths. See
ITM_beginTransaction and gtm_thread::begin_transaction. */
pr_HTMRetryableAbort = 0x800000,
pr_HTMRetriedAfterAbort = 0x1000000
} _ITM_codeProperties;
/* Result from startTransaction that describes what actions to take.
Some of these constants are duplicated in some of the ITM_beginTransaction
implementations, so update those too when applying any changes. */
typedef enum
{
a_runInstrumentedCode = 0x01,
a_runUninstrumentedCode = 0x02,
a_saveLiveVariables = 0x04,
a_restoreLiveVariables = 0x08,
a_abortTransaction = 0x10,
a_tryHTMFastPath = 0x20
} _ITM_actions;
typedef struct
{
uint32_t reserved_1;
uint32_t flags;
uint32_t reserved_2;
uint32_t reserved_3;
const char *psource;
} _ITM_srcLocation;
typedef void (* _ITM_userUndoFunction)(void *);
typedef void (* _ITM_userCommitFunction) (void *);
#define _ITM_VERSION "0.90 (Feb 29 2008)"
#define _ITM_VERSION_NO 90
extern int _ITM_versionCompatible (int) ITM_REGPARM;
extern const char * _ITM_libraryVersion (void) ITM_REGPARM;
void _ITM_error(const _ITM_srcLocation *, int errorCode)
ITM_REGPARM ITM_NORETURN;
extern _ITM_howExecuting _ITM_inTransaction(void) ITM_REGPARM;
typedef uint64_t _ITM_transactionId_t; /* Transaction identifier */
#define _ITM_noTransactionId 1 /* Id for non-transactional code. */
extern _ITM_transactionId_t _ITM_getTransactionId(void) ITM_REGPARM;
extern uint32_t _ITM_beginTransaction(uint32_t, ...) ITM_REGPARM;
extern void _ITM_abortTransaction(_ITM_abortReason) ITM_REGPARM ITM_NORETURN;
extern void _ITM_commitTransaction (void) ITM_REGPARM;
extern void _ITM_changeTransactionMode (_ITM_transactionState) ITM_REGPARM;
extern void _ITM_addUserCommitAction(_ITM_userCommitFunction,
_ITM_transactionId_t, void *) ITM_REGPARM;
extern void _ITM_addUserUndoAction(_ITM_userUndoFunction, void *) ITM_REGPARM;
extern void _ITM_dropReferences (void *, size_t) ITM_REGPARM ITM_PURE;
extern void *_ITM_malloc (size_t)
__attribute__((__malloc__)) ITM_PURE;
extern void *_ITM_calloc (size_t, size_t)
__attribute__((__malloc__)) ITM_PURE;
extern void _ITM_free (void *) ITM_PURE;
/* The following typedefs exist to make the macro expansions below work
properly. They are not part of any API. */
typedef uint8_t _ITM_TYPE_U1;
typedef uint16_t _ITM_TYPE_U2;
typedef uint32_t _ITM_TYPE_U4;
typedef uint64_t _ITM_TYPE_U8;
typedef float _ITM_TYPE_F;
typedef double _ITM_TYPE_D;
typedef long double _ITM_TYPE_E;
typedef float _Complex _ITM_TYPE_CF;
typedef double _Complex _ITM_TYPE_CD;
typedef long double _Complex _ITM_TYPE_CE;
#define ITM_BARRIERS(T) \
extern _ITM_TYPE_##T _ITM_R##T(const _ITM_TYPE_##T *) ITM_REGPARM; \
extern _ITM_TYPE_##T _ITM_RaR##T(const _ITM_TYPE_##T *) ITM_REGPARM; \
extern _ITM_TYPE_##T _ITM_RaW##T(const _ITM_TYPE_##T *) ITM_REGPARM; \
extern _ITM_TYPE_##T _ITM_RfW##T(const _ITM_TYPE_##T *) ITM_REGPARM; \
extern void _ITM_W##T (_ITM_TYPE_##T *, _ITM_TYPE_##T) ITM_REGPARM; \
extern void _ITM_WaR##T (_ITM_TYPE_##T *, _ITM_TYPE_##T) ITM_REGPARM; \
extern void _ITM_WaW##T (_ITM_TYPE_##T *, _ITM_TYPE_##T) ITM_REGPARM;
ITM_BARRIERS(U1)
ITM_BARRIERS(U2)
ITM_BARRIERS(U4)
ITM_BARRIERS(U8)
ITM_BARRIERS(F)
ITM_BARRIERS(D)
ITM_BARRIERS(E)
ITM_BARRIERS(CF)
ITM_BARRIERS(CD)
ITM_BARRIERS(CE)
#define ITM_LOG(T) \
extern void _ITM_L##T (const _ITM_TYPE_##T *) ITM_REGPARM;
ITM_LOG(U1)
ITM_LOG(U2)
ITM_LOG(U4)
ITM_LOG(U8)
ITM_LOG(F)
ITM_LOG(D)
ITM_LOG(E)
ITM_LOG(CF)
ITM_LOG(CD)
ITM_LOG(CE)
#if defined(__i386__) || defined(__x86_64__)
# ifdef __MMX__
typedef int _ITM_TYPE_M64 __attribute__((vector_size(8), may_alias));
ITM_BARRIERS(M64)
ITM_LOG(M64)
# endif
# ifdef __SSE__
typedef float _ITM_TYPE_M128 __attribute__((vector_size(16), may_alias));
ITM_BARRIERS(M128)
ITM_LOG(M128)
# endif
# ifdef __AVX__
typedef float _ITM_TYPE_M256 __attribute__((vector_size(32), may_alias));
ITM_BARRIERS(M256)
ITM_LOG(M256)
# endif
#endif /* i386 */
#undef ITM_BARRIERS
#undef ITM_LOG
extern void _ITM_LB (const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRnWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRnWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRnWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaRWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaRWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaRWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaRWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaWWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaWWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaWWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memcpyRtaWWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRnWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRnWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRnWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaRWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaRWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaRWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaRWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaWWn(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaWWt(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaWWtaR(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memmoveRtaWWtaW(void *, const void *, size_t) ITM_REGPARM;
extern void _ITM_memsetW(void *, int, size_t) ITM_REGPARM;
extern void _ITM_memsetWaR(void *, int, size_t) ITM_REGPARM;
extern void _ITM_memsetWaW(void *, int, size_t) ITM_REGPARM;
// ??? These are not yet in the official spec; still work-in-progress.
extern void *_ITM_getTMCloneOrIrrevocable (void *) ITM_REGPARM;
extern void *_ITM_getTMCloneSafe (void *) ITM_REGPARM;
extern void _ITM_registerTMCloneTable (void *, size_t);
extern void _ITM_deregisterTMCloneTable (void *);
extern void *_ITM_cxa_allocate_exception (size_t) _ITM_NOTHROW;
extern void _ITM_cxa_free_exception (void *exc_ptr) _ITM_NOTHROW;
extern void _ITM_cxa_throw (void *obj, void *tinfo, void (*dest) (void *));
extern void *_ITM_cxa_begin_catch (void *exc_ptr) _ITM_NOTHROW;
extern void _ITM_cxa_end_catch (void); /* This can throw. */
extern void _ITM_commitTransactionEH(void *exc_ptr) ITM_REGPARM;
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* LIBITM_H */