break;
case v8::JitCodeEvent::CODE_MOVED: {
- ++move_events;
-
uint32_t hash = i::ComputePointerHash(event->code_start);
- // We should never see code move that we haven't seen before.
+ // We would like to never see code move that we haven't seen before,
+ // but the code creation event does not happen until the line endings
+ // have been calculated (this is so that we can report the line in the
+ // script at which the function source is found, see
+ // Compiler::RecordFunctionCompilation) and the line endings
+ // calculations can cause a GC, which can move the newly created code
+ // before its existence can be logged.
i::HashMap::Entry* entry =
code_map->Lookup(event->code_start, hash, false);
- CHECK(entry != NULL);
- CHECK_EQ(reinterpret_cast<void*>(event->code_len), entry->value);
- code_map->Remove(event->code_start, hash);
-
- entry = code_map->Lookup(event->new_code_start,
- i::ComputePointerHash(event->new_code_start),
- true);
- CHECK(entry != NULL);
- entry->value = reinterpret_cast<void*>(event->code_len);
+ if (entry != NULL) {
+ ++move_events;
+
+ CHECK_EQ(reinterpret_cast<void*>(event->code_len), entry->value);
+ code_map->Remove(event->code_start, hash);
+
+ entry = code_map->Lookup(event->new_code_start,
+ i::ComputePointerHash(event->new_code_start),
+ true);
+ CHECK(entry != NULL);
+ entry->value = reinterpret_cast<void*>(event->code_len);
+ }
}
break;