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gcc/libitm/libitm.h
Nathan Sidwell f0de5d83ee Fix throw specifiers on interface. 
I discovered that libitm:
(a) declares __cxa_allocate_exception and friends directly,
(b) doesn't mark them as 'throw()'
(c) doesn't mark the replacment fns _ITM_$foo as nothrow either

We happen to get away with it because of code in the compiler that,
although it checks the parameter types, doesn't check the exception
specification.  (One reason being they used to not be part of the
language's type system, but now they are.)  I suspect this can lead us
to generate pessimal code later, if we've seen one of these decls
earlier.  Anyway, with modules it becomes trickier[*], so I'm trying
to clean it up and not be a problem.  I see Jakub fixed part of the
problem
(https://gcc.gnu.org/pipermail/gcc-patches/2018-December/513302.html)
AFAICT, he did fix libitm's decls, but left the lax parm-type checking
in the compiler.

libitm.h is not very informative about specification:
  in version 1 of http://www.intel.com/some/path/here.pdf.  */

Anyway, it was too fiddly to have libitm pick up the declarations from
libsupc++.  Besides it makes them weak declarations, and then provides
definitions for non-elf systems.  So this patch adds the expected
'throw()'

	* libitm/libitm.h (_ITM_NOTHROW): Define.
	(_ITM_cxa_allocate_exception, _ITM_cxa_free_exception)
	(_ITM_cxa_begin_catch): Use it.
	* eh_cpp.cc: Add throw() to __cxa_allocate_exception,
	__cxa_free_exception, __cxa_begin_catch, __cxa_tm_cleanup,
	__cxa_get_globals.
	(_ITM_cxa_allocate_exception, _ITM_cxa_free_exception)
	(_ITM_cxa_begin_catch): Likewise.
2020-05-12 10:54:53 -07:00

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/* Copyright (C) 2008-2020 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
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 */
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