Class: Dtrace::Dof::Parser

Inherits:
Object
  • Object
show all
Defined in:
ext/dof/dof_api.c

Class Method Summary collapse

Class Method Details

.parse(rdof) ⇒ Object

Parse the given DOF



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# File 'ext/dof/parser.c', line 333

VALUE dof_parse(VALUE self, VALUE rdof)
{
  VALUE dof_data;
  VALUE sec_data;
  VALUE ctx;
  VALUE sec;
  char *dof;
  char *pos;
  dof_hdr_t dof_hdr;
  dof_sec_t dof_sec;
  int i;

  ctx = rb_hash_new();
  rb_cv_set(self, "@@ctx", ctx);

  dof = STR2CSTR(rdof);
  pos = dof;
  memcpy(&dof_hdr, pos, sizeof(dof_hdr));

  /* Check magic */
  if (!(dof_hdr.dofh_ident[0] == DOF_MAG_MAG0 &&
	dof_hdr.dofh_ident[1] == DOF_MAG_MAG1 &&
	dof_hdr.dofh_ident[2] == DOF_MAG_MAG2 &&
	dof_hdr.dofh_ident[3] == DOF_MAG_MAG3)) {
    rb_raise(eDtraceDofException, "bad DOF header magic");
    return Qnil;
  }
  pos += dof_hdr.dofh_hdrsize;
  
  dof_data = rb_ary_new();
  
  /* Walk section headers, parsing sections */
  for (i = 0; i < dof_hdr.dofh_secnum; i++) {
    memcpy(&dof_sec, pos, sizeof(struct dof_sec));

    sec_data = rb_hash_new();
    rb_hash_aset(sec_data, ID2SYM(rb_intern("index")), INT2FIX(i));
    rb_hash_aset(sec_data, ID2SYM(rb_intern("type")),  rb_str_new2(_dof_sec_type(dof_sec.dofs_type)));
    rb_hash_aset(sec_data, ID2SYM(rb_intern("flags")), INT2FIX(dof_sec.dofs_flags));

    sec = Qnil;
    switch(dof_sec.dofs_type) {
    case DOF_SECT_STRTAB:
      sec = _dof_parse_string_table(self, dof, &dof_sec);
      break;
    case DOF_SECT_PROBES:
      sec = _dof_parse_dof_probe_t_array(self, dof, &dof_sec);
      break;
    case DOF_SECT_PROVIDER:
      sec = _dof_parse_dof_provider_t(self, dof, &dof_sec);
      break;
    case DOF_SECT_PRARGS:
      sec = _dof_parse_uint8_t_array(self, dof, &dof_sec);
      break;
    case DOF_SECT_PRENOFFS:
    case DOF_SECT_PROFFS:
      sec = _dof_parse_uint32_t_array(self, dof, &dof_sec);
      break;
    case DOF_SECT_RELTAB:
      sec = _dof_parse_dof_relodesc_t_array(self, dof, &dof_sec);
      break;
    case DOF_SECT_URELHDR:
      sec = _dof_parse_dof_relohdr_t(self, dof, &dof_sec);
      break;
    case DOF_SECT_UTSNAME:
      sec = _dof_parse_utsname(self, dof, &dof_sec);
      break;      
    case DOF_SECT_COMMENTS:
      sec = _dof_parse_comments(self, dof, &dof_sec);
      break;      
    default:
      sec = _dof_parse_unknown(self, dof, &dof_sec);
      break;
    }
    rb_hash_aset(sec_data, ID2SYM(rb_intern("data")), sec);

    rb_ary_push(dof_data, sec_data);
    pos += dof_hdr.dofh_secsize;
  }

  return dof_data;
}