diff options
Diffstat (limited to 'lib/erl_interface/src/decode/decode_trace.c')
| -rw-r--r-- | lib/erl_interface/src/decode/decode_trace.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/lib/erl_interface/src/decode/decode_trace.c b/lib/erl_interface/src/decode/decode_trace.c index ebaa78e29e..88fb3451ec 100644 --- a/lib/erl_interface/src/decode/decode_trace.c +++ b/lib/erl_interface/src/decode/decode_trace.c @@ -22,18 +22,30 @@ int ei_decode_trace(const char *buf, int *index, erlang_trace *p) { int arity = 0; - int tindex = *index; - - /* use a temporary index if any function should fail */ + int tindex = *index; /* use a temporary index if any function should fail */ + long *p_flags, *p_label, *p_serial, *p_prev; + erlang_pid *p_from; + + if (p != NULL) { + p_flags = &p->flags; + p_label = &p->label; + p_serial = &p->serial; + p_prev = &p->prev; + p_from = &p->from; + } + else { + p_flags = p_label = p_serial = p_prev = NULL; + p_from = NULL; + } /* { Flags, Label, Serial, FromPid, Prev } */ if (ei_decode_tuple_header(buf, &tindex, &arity) || (arity != 5) - || ei_decode_long(buf, &tindex, &p->flags) - || ei_decode_long(buf, &tindex, &p->label) - || ei_decode_long(buf, &tindex, &p->serial) - || ei_decode_pid( buf, &tindex, &p->from) - || ei_decode_long(buf, &tindex, &p->prev)) return -1; + || ei_decode_long(buf, &tindex, p_flags) + || ei_decode_long(buf, &tindex, p_label) + || ei_decode_long(buf, &tindex, p_serial) + || ei_decode_pid( buf, &tindex, p_from) + || ei_decode_long(buf, &tindex, p_prev)) return -1; /* index is updated by the functions we called */ |