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-rw-r--r--erts/emulator/beam/erl_bif_trace.c24
-rw-r--r--erts/emulator/beam/erl_process.h5
2 files changed, 20 insertions, 9 deletions
diff --git a/erts/emulator/beam/erl_bif_trace.c b/erts/emulator/beam/erl_bif_trace.c
index 9861483bf0..97e869f5a3 100644
--- a/erts/emulator/beam/erl_bif_trace.c
+++ b/erts/emulator/beam/erl_bif_trace.c
@@ -74,7 +74,7 @@ static void smp_bp_finisher(void* arg);
static BIF_RETTYPE
system_monitor(Process *p, Eterm monitor_pid, Eterm list);
-static void new_seq_trace_token(Process* p); /* help func for seq_trace_2*/
+static void new_seq_trace_token(Process* p, int); /* help func for seq_trace_2*/
static Eterm trace_info_pid(Process* p, Eterm pid_spec, Eterm key);
static Eterm trace_info_func(Process* p, Eterm pid_spec, Eterm key);
static Eterm trace_info_on_load(Process* p, Eterm key);
@@ -1874,7 +1874,7 @@ Eterm erts_seq_trace(Process *p, Eterm arg1, Eterm arg2,
if (current_flag && ( (arg2 == am_true) || (arg2 == am_false)) ) {
/* Flags */
- new_seq_trace_token(p);
+ new_seq_trace_token(p, 0);
flags = unsigned_val(SEQ_TRACE_TOKEN_FLAGS(p));
if (build_result) {
old_value = flags & current_flag ? am_true : am_false;
@@ -1889,11 +1889,11 @@ Eterm erts_seq_trace(Process *p, Eterm arg1, Eterm arg2,
return old_value;
}
else if (arg1 == am_label) {
- new_seq_trace_token(p);
+ new_seq_trace_token(p, is_not_immed(arg2));
if (build_result) {
old_value = SEQ_TRACE_TOKEN_LABEL(p);
}
- SEQ_TRACE_TOKEN_LABEL(p) = arg2;
+ SEQ_TRACE_TOKEN_LABEL(p) = arg2;
return old_value;
}
else if (arg1 == am_serial) {
@@ -1905,7 +1905,7 @@ Eterm erts_seq_trace(Process *p, Eterm arg1, Eterm arg2,
if ((*tp != make_arityval(2)) || is_not_small(*(tp+1)) || is_not_small(*(tp+2))) {
return THE_NON_VALUE;
}
- new_seq_trace_token(p);
+ new_seq_trace_token(p, 0);
if (build_result) {
hp = HAlloc(p,3);
old_value = TUPLE2(hp, SEQ_TRACE_TOKEN_LASTCNT(p),
@@ -1940,8 +1940,8 @@ Eterm erts_seq_trace(Process *p, Eterm arg1, Eterm arg2,
}
}
-void
-new_seq_trace_token(Process* p)
+static void
+new_seq_trace_token(Process* p, int ensure_new_heap)
{
Eterm* hp;
@@ -1953,6 +1953,16 @@ new_seq_trace_token(Process* p)
p->common.id, /* Internal pid */ /* From */
make_small(p->seq_trace_lastcnt));
}
+ else if (ensure_new_heap) {
+ Eterm* tpl = tuple_val(SEQ_TRACE_TOKEN(p));
+ ASSERT(arityval(tpl[0]) == 5);
+ if (ErtsInArea(tpl, OLD_HEAP(p),
+ (OLD_HEND(p) - OLD_HEAP(p))*sizeof(Eterm))) {
+ hp = HAlloc(p, 6);
+ sys_memcpy(hp, tpl, 6*sizeof(Eterm));
+ SEQ_TRACE_TOKEN(p) = make_tuple(hp);
+ }
+ }
}
BIF_RETTYPE erl_seq_trace_info(Process *p, Eterm item)
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index a60e117bab..212774e421 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -1226,9 +1226,10 @@ void erts_check_for_holes(Process* p);
/* The sequential tracing token is a tuple of size 5:
*
- * {Flags, Label, Serial, Sender}
+ * {Flags, Label, Serial, Sender, LastCnt}
+ *
+ * WARNING: The top 5-tuple is *MUTABLE* and thus INTERNAL ONLY.
*/
-
#define SEQ_TRACE_TOKEN_ARITY(p) (arityval(*(tuple_val(SEQ_TRACE_TOKEN(p)))))
#define SEQ_TRACE_TOKEN_FLAGS(p) (*(tuple_val(SEQ_TRACE_TOKEN(p)) + 1))
#define SEQ_TRACE_TOKEN_LABEL(p) (*(tuple_val(SEQ_TRACE_TOKEN(p)) + 2))