/* The _ITM_beginTransaction is defined in assembly (arch.S) */
uint32_t _ITM_CALL_CONVENTION GTM_begin_transaction(TX_ARGS uint32_t attr, jmp_buf * buf)
{
/* FIXME first time return a_saveLiveVariable +> siglongjmp must return a_restoreLiveVariable (and set a_saveLiveVariable)
* check a_abortTransaction attr
* */
TX_GET_ABI;
uint32_t ret;
sigjmp_buf * env;
/* This variable is in the stack but stm_start copies the content. */
stm_tx_attr_t _a = (stm_tx_attr_t)0;
#ifdef TM_GCC
/* GCC does not call initializeProcess TODO: other fix possible? */
if (unlikely(tx == NULL)) {
/* Thread not initialized: must create transaction */
tx = abi_init_thread();
}
#endif
assert(tx != NULL);
#ifdef TM_DTMC
/* FIXME this should be fixed with stdcall conv call */
/* DTMC prior or equal to Velox R3 did not use regparm(2) with x86-32. */
/* TODO to be removed when new release of DTMC fix it. */
/* attr = 3; */
ret = a_runInstrumentedCode;
#else /* !TM_DTMC */
/* Manage attribute for the transaction */
if (unlikely((attr & pr_doesGoIrrevocable) || !(attr & pr_instrumentedCode))) {
/* TODO Add an attribute to specify irrevocable TX */
stm_set_irrevocable_tx(tx, 1);
ret = a_runUninstrumentedCode;
if ((attr & pr_multiwayCode) == pr_instrumentedCode)
ret = a_runInstrumentedCode;
} else {
#ifdef TM_GCC
if (attr & pr_readOnly)
_a.read_only = 1;
#endif /* TM_GCC */
ret = a_runInstrumentedCode | a_saveLiveVariables;
}
#endif /* !TM_DTMC */
#ifdef TM_DTMC
/* if (ret & a_runInstrumentedCode) */
tanger_stm_save_stack();
#endif /* TM_DTMC */
env = int_stm_start(tx, _a);
/* Save thread context only when outermost transaction */
/* TODO check that the memcpy is fast. */
if (likely(env != NULL))
memcpy(env, buf, sizeof(jmp_buf)); /* TODO limit size to real size */
return ret;
}
/*
* Called by the CURRENT thread to start a transaction.
*/
_CALLCONV sigjmp_buf *
stm_start(stm_tx_attr_t attr)
{
TX_GET;
sigjmp_buf * ret;
if (tx->thread_identifier!=0) stm_wait(attr.id);
ret=int_stm_start(tx, attr);
return ret;
}
/*
* Called by the CURRENT thread to start a transaction.
*/
_CALLCONV sigjmp_buf *
stm_start(stm_tx_attr_t attr)
{
TX_GET;
sigjmp_buf * ret;
stm_wait(attr.id);
ret=int_stm_start(tx, attr);
return ret;
}
/* The _ITM_beginTransaction is defined in assembly (arch.S) */
uint32_t _ITM_CALL_CONVENTION GTM_begin_transaction(TX_ARGS uint32_t attr, jmp_buf * buf)
{
/* FIXME first time return a_saveLiveVariable +> siglongjmp must return a_restoreLiveVariable (and set a_saveLiveVariable)
* check a_abortTransaction attr
* */
TX_GET_ABI;
uint32_t ret;
/* This variable is in the stack but stm_start copies the content. */
stm_tx_attr_t _a = (stm_tx_attr_t)0;
/* GCC does not call initializeProcess TODO: other fix possible? */
if (unlikely(tx == NULL)) {
/* Thread not initialized: must create transaction */
tx = abi_init_thread();
}
assert(tx != NULL);
/* Manage attribute for the transaction */
if (unlikely((attr & pr_doesGoIrrevocable) || !(attr & pr_instrumentedCode))) {
/* TODO Add an attribute to specify irrevocable TX */
stm_set_irrevocable_tx(tx, 1);
ret = a_runUninstrumentedCode;
if ((attr & pr_multiwayCode) == pr_instrumentedCode)
ret = a_runInstrumentedCode;
} else {
if (attr & pr_readOnly)
_a.read_only = 1;
ret = a_runInstrumentedCode | a_saveLiveVariables;
}
if (int_stm_start(tx, &thread_local_buffer, _a) == 1) {
memcpy(&thread_local_buffer, buf, sizeof(jmp_buf));
}
/* Save thread context only when outermost transaction */
return ret;
}
_CALLCONV sigjmp_buf *
stm_start_tx(stm_tx_t *tx, stm_tx_attr_t attr)
{
return int_stm_start(tx, attr);
}
/*
* Called by the CURRENT thread to start a transaction.
*/
_CALLCONV sigjmp_buf *
stm_start(stm_tx_attr_t attr)
{
TX_GET;
return int_stm_start(tx, attr);
}
