void
erts_bp_match_export(BpFunctions* f, ErtsCodeMFA *mfa, int specified)
{
ErtsCodeIndex code_ix = erts_active_code_ix();
int i;
int num_exps = export_list_size(code_ix);
int ne;
f->matching = (BpFunction *) Alloc(num_exps*sizeof(BpFunction));
ne = 0;
for (i = 0; i < num_exps; i++) {
Export* ep = export_list(i, code_ix);
BeamInstr* pc;
switch (specified) {
case 3:
if (mfa->arity != ep->info.mfa.arity)
continue;
case 2:
if (mfa->function != ep->info.mfa.function)
continue;
case 1:
if (mfa->module != ep->info.mfa.module)
continue;
case 0:
break;
default:
ASSERT(0);
}
pc = ep->beam;
if (ep->addressv[code_ix] == pc) {
if ((*pc == (BeamInstr) em_apply_bif ||
*pc == (BeamInstr) em_call_error_handler)) {
continue;
}
ASSERT(*pc == (BeamInstr) BeamOp(op_i_generic_breakpoint));
} else if (erts_is_function_native(erts_code_to_codeinfo(ep->addressv[code_ix]))) {
continue;
}
f->matching[ne].ci = &ep->info;
f->matching[ne].mod = erts_get_module(ep->info.mfa.module, code_ix);
ne++;
}
f->matched = ne;
}
BIF_RETTYPE
erts_debug_disassemble_1(BIF_ALIST_1)
{
Process* p = BIF_P;
Eterm addr = BIF_ARG_1;
erts_dsprintf_buf_t *dsbufp;
Eterm* hp;
Eterm* tp;
Eterm bin;
Eterm mfa;
ErtsCodeMFA *cmfa = NULL;
BeamCodeHeader* code_hdr;
BeamInstr *code_ptr;
BeamInstr instr;
BeamInstr uaddr;
Uint hsz;
int i;
if (term_to_UWord(addr, &uaddr)) {
code_ptr = (BeamInstr *) uaddr;
if ((cmfa = find_function_from_pc(code_ptr)) == NULL) {
BIF_RET(am_false);
}
} else if (is_tuple(addr)) {
ErtsCodeIndex code_ix;
Module* modp;
Eterm mod;
Eterm name;
Export* ep;
Sint arity;
int n;
tp = tuple_val(addr);
if (tp[0] != make_arityval(3)) {
error:
BIF_ERROR(p, BADARG);
}
mod = tp[1];
name = tp[2];
if (!is_atom(mod) || !is_atom(name) || !is_small(tp[3])) {
goto error;
}
arity = signed_val(tp[3]);
code_ix = erts_active_code_ix();
modp = erts_get_module(mod, code_ix);
/*
* Try the export entry first to allow disassembly of special functions
* such as erts_debug:apply/4. Then search for it in the module.
*/
if ((ep = erts_find_function(mod, name, arity, code_ix)) != NULL) {
/* XXX: add "&& ep->address != ep->code" condition?
* Consider a traced function.
* Its ep will have ep->address == ep->code.
* erts_find_function() will return the non-NULL ep.
* Below we'll try to derive a code_ptr from ep->address.
* But this code_ptr will point to the start of the Export,
* not the function's func_info instruction. BOOM !?
*/
cmfa = erts_code_to_codemfa(ep->addressv[code_ix]);
} else if (modp == NULL || (code_hdr = modp->curr.code_hdr) == NULL) {
BIF_RET(am_undef);
} else {
n = code_hdr->num_functions;
for (i = 0; i < n; i++) {
cmfa = &code_hdr->functions[i]->mfa;
if (cmfa->function == name && cmfa->arity == arity) {
break;
}
}
if (i == n) {
BIF_RET(am_undef);
}
}
code_ptr = (BeamInstr*)erts_code_to_codeinfo(erts_codemfa_to_code(cmfa));
} else {
goto error;
}
dsbufp = erts_create_tmp_dsbuf(0);
erts_print(ERTS_PRINT_DSBUF, (void *) dsbufp, HEXF ": ", code_ptr);
instr = (BeamInstr) code_ptr[0];
for (i = 0; i < NUM_SPECIFIC_OPS; i++) {
if (BeamIsOpCode(instr, i) && opc[i].name[0] != '\0') {
code_ptr += print_op(ERTS_PRINT_DSBUF, (void *) dsbufp,
i, opc[i].sz-1, code_ptr) + 1;
break;
}
}
if (i >= NUM_SPECIFIC_OPS) {
erts_print(ERTS_PRINT_DSBUF, (void *) dsbufp,
"unknown " HEXF "\n", instr);
code_ptr++;
}
bin = new_binary(p, (byte *) dsbufp->str, dsbufp->str_len);
erts_destroy_tmp_dsbuf(dsbufp);
hsz = 4+4;
(void) erts_bld_uword(NULL, &hsz, (BeamInstr) code_ptr);
hp = HAlloc(p, hsz);
addr = erts_bld_uword(&hp, NULL, (BeamInstr) code_ptr);
ASSERT(is_atom(cmfa->module) || is_nil(cmfa->module));
ASSERT(is_atom(cmfa->function) || is_nil(cmfa->function));
mfa = TUPLE3(hp, cmfa->module, cmfa->function,
make_small(cmfa->arity));
hp += 4;
return TUPLE3(hp, addr, bin, mfa);
}
