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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define ERTS_WANT_NFUNC_SCHED_INTERNALS__
#include "global.h"
#include "erl_process.h"
#include "bif.h"
#include "erl_nfunc_sched.h"
#include "erl_trace.h"
NifExport *
erts_new_proc_nif_export(Process *c_p, int argc)
{
size_t size;
int i;
NifExport *nep, *old_nep;
size = sizeof(NifExport) + (argc-1)*sizeof(Eterm);
nep = erts_alloc(ERTS_ALC_T_NIF_TRAP_EXPORT, size);
for (i = 0; i < ERTS_NUM_CODE_IX; i++)
nep->exp.addressv[i] = &nep->exp.beam[0];
nep->argc = -1; /* unused marker */
nep->argv_size = argc;
nep->trace = NULL;
old_nep = ERTS_PROC_SET_NIF_TRAP_EXPORT(c_p, nep);
if (old_nep) {
ASSERT(!nep->trace);
erts_free(ERTS_ALC_T_NIF_TRAP_EXPORT, old_nep);
}
return nep;
}
void
erts_destroy_nif_export(Process *p)
{
NifExport *nep = ERTS_PROC_SET_NIF_TRAP_EXPORT(p, NULL);
if (nep) {
if (nep->m)
erts_nif_export_cleanup_nif_mod(nep);
erts_free(ERTS_ALC_T_NIF_TRAP_EXPORT, nep);
}
}
void
erts_nif_export_save_trace(Process *c_p, NifExport *nep, int applying,
Export* ep, BeamInstr *cp, Uint32 flags,
Uint32 flags_meta, BeamInstr* I,
ErtsTracer meta_tracer)
{
NifExportTrace *netp;
ASSERT(nep && nep->argc >= 0);
ASSERT(!nep->trace);
netp = erts_alloc(ERTS_ALC_T_NIF_EXP_TRACE,
sizeof(NifExportTrace));
netp->applying = applying;
netp->ep = ep;
netp->cp = cp;
netp->flags = flags;
netp->flags_meta = flags_meta;
netp->I = I;
netp->meta_tracer = NIL;
erts_tracer_update(&netp->meta_tracer, meta_tracer);
nep->trace = netp;
}
void
erts_nif_export_restore_trace(Process *c_p, Eterm result, NifExport *nep)
{
NifExportTrace *netp = nep->trace;
nep->trace = NULL;
erts_bif_trace_epilogue(c_p, result, netp->applying, netp->ep,
netp->cp, netp->flags, netp->flags_meta,
netp->I, netp->meta_tracer);
erts_tracer_update(&netp->meta_tracer, NIL);
erts_free(ERTS_ALC_T_NIF_EXP_TRACE, netp);
}
NifExport *
erts_nif_export_schedule(Process *c_p, Process *dirty_shadow_proc,
ErtsCodeMFA *mfa, BeamInstr *pc,
BeamInstr instr,
void *dfunc, void *ifunc,
Eterm mod, Eterm func,
int argc, const Eterm *argv)
{
Process *used_proc;
ErtsSchedulerData *esdp;
Eterm* reg;
NifExport* nep;
int i;
ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p)
& ERTS_PROC_LOCK_MAIN);
if (dirty_shadow_proc) {
esdp = erts_get_scheduler_data();
ASSERT(esdp && ERTS_SCHEDULER_IS_DIRTY(esdp));
used_proc = dirty_shadow_proc;
}
else {
esdp = erts_proc_sched_data(c_p);
ASSERT(esdp && !ERTS_SCHEDULER_IS_DIRTY(esdp));
used_proc = c_p;
ERTS_VBUMP_ALL_REDS(c_p);
}
reg = esdp->x_reg_array;
if (mfa)
nep = erts_get_proc_nif_export(c_p, (int) mfa->arity);
else {
/* If no mfa, this is not the first schedule... */
nep = ERTS_PROC_GET_NIF_TRAP_EXPORT(c_p);
ASSERT(nep && nep->argc >= 0);
}
if (nep->argc < 0) {
/*
* First schedule; save things that might
* need to be restored...
*/
for (i = 0; i < (int) mfa->arity; i++)
nep->argv[i] = reg[i];
nep->pc = pc;
nep->cp = c_p->cp;
nep->mfa = mfa;
nep->current = c_p->current;
ASSERT(argc >= 0);
nep->argc = (int) mfa->arity;
nep->m = NULL;
ASSERT(!erts_check_nif_export_in_area(c_p,
(char *) nep,
(sizeof(NifExport)
+ (sizeof(Eterm)
*(nep->argc-1)))));
}
/* Copy new arguments into register array if necessary... */
if (reg != argv) {
for (i = 0; i < argc; i++)
reg[i] = argv[i];
}
ASSERT(is_atom(mod) && is_atom(func));
nep->exp.info.mfa.module = mod;
nep->exp.info.mfa.function = func;
nep->exp.info.mfa.arity = (Uint) argc;
nep->exp.beam[0] = (BeamInstr) instr; /* call_nif || apply_bif */
nep->exp.beam[1] = (BeamInstr) dfunc;
nep->func = ifunc;
used_proc->arity = argc;
used_proc->freason = TRAP;
used_proc->i = (BeamInstr*) nep->exp.addressv[0];
return nep;
}
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