illumos gate

dt_cg_ptrsize() can leak a register:

185 dt_cg_ptrsize(dt_node_t dnp, dt_irlist_t *dlp, dt_regset_t *drp,
    186     uint_t op, int dreg)
    187 {
    188     ctf_file_t *ctfp = dnp->dn_ctfp;
    189     ctf_arinfo_t r;
    190     dif_instr_t instr;
    191     ctf_id_t type;
    192     uint_t kind;
    193     ssize_t size;
    194     int sreg;
    195 
    196     if ((sreg = dt_regset_alloc(drp)) == 1)
    197         longjmp(yypcb>pcb_jmpbuf, EDT_NOREG);
    198 
    199     type = ctf_type_resolve(ctfp, dnp->dn_type);
    200     kind = ctf_type_kind(ctfp, type);
    201     assert(kind  CTF_K_POINTER || kind  CTF_K_ARRAY);
    202 
    203     if (kind == CTF_K_ARRAY) {
    204         if (ctf_array_info(ctfp, type, &r) != 0) {
    205             yypcb->pcb_hdl->dt_ctferr = ctf_errno(ctfp);
    206             longjmp(yypcb->pcb_jmpbuf, EDT_CTF);
    207         }
    208         type = r.ctr_contents;
    209     } else
    210         type = ctf_type_reference(ctfp, type);
    211 
    212     if ((size = ctf_type_size(ctfp, type)) == 1)
    213         return; / multiply or divide by one can be omitted */  <---- LEAK!
    214 
    215     dt_cg_setx(dlp, sreg, size);
    216     instr = DIF_INSTR_FMT(op, dreg, sreg, dreg);
    217     dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr));
    218     dt_regset_free(drp, sreg);
    219 }