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6937142: G1: improvements to debugging output (S-M)

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Various fixes to the G1 debugging output.

Reviewed-by: johnc, iveresov
This commit is contained in:
Antonios Printezis 2010-03-30 15:43:03 -04:00
parent f5197d0d36
commit 9b4fc8fc23
5 changed files with 133 additions and 88 deletions
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42
hotspot/src/share/vm/gc_implementation/g1/heapRegion.cpp
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@ -75,6 +75,16 @@ public:
virtual void do_oop(narrowOop* p) { do_oop_work(p); }
virtual void do_oop( oop* p) { do_oop_work(p); }
void print_object(outputStream* out, oop obj) {
#ifdef PRODUCT
klassOop k = obj->klass();
const char* class_name = instanceKlass::cast(k)->external_name();
out->print_cr("class name %s", class_name);
#else // PRODUCT
obj->print_on(out);
#endif // PRODUCT
}
template <class T> void do_oop_work(T* p) {
assert(_containing_obj != NULL, "Precondition");
assert(!_g1h->is_obj_dead_cond(_containing_obj, _use_prev_marking),
@ -90,21 +100,29 @@ public:
gclog_or_tty->print_cr("----------");
}
if (!_g1h->is_in_closed_subset(obj)) {
HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
gclog_or_tty->print_cr("Field "PTR_FORMAT
" of live obj "PTR_FORMAT
" points to obj "PTR_FORMAT
" not in the heap.",
p, (void*) _containing_obj, (void*) obj);
" of live obj "PTR_FORMAT" in region "
"["PTR_FORMAT", "PTR_FORMAT")",
p, (void*) _containing_obj,
from->bottom(), from->end());
print_object(gclog_or_tty, _containing_obj);
gclog_or_tty->print_cr("points to obj "PTR_FORMAT" not in the heap",
(void*) obj);
} else {
HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj);
gclog_or_tty->print_cr("Field "PTR_FORMAT
" of live obj "PTR_FORMAT
" points to dead obj "PTR_FORMAT".",
p, (void*) _containing_obj, (void*) obj);
" of live obj "PTR_FORMAT" in region "
"["PTR_FORMAT", "PTR_FORMAT")",
p, (void*) _containing_obj,
from->bottom(), from->end());
print_object(gclog_or_tty, _containing_obj);
gclog_or_tty->print_cr("points to dead obj "PTR_FORMAT" in region "
"["PTR_FORMAT", "PTR_FORMAT")",
(void*) obj, to->bottom(), to->end());
print_object(gclog_or_tty, obj);
}
gclog_or_tty->print_cr("Live obj:");
_containing_obj->print_on(gclog_or_tty);
gclog_or_tty->print_cr("Bad referent:");
obj->print_on(gclog_or_tty);
gclog_or_tty->print_cr("----------");
_failures = true;
failed = true;
@ -723,6 +741,8 @@ void HeapRegion::print_on(outputStream* st) const {
else
st->print(" ");
st->print(" %5d", _gc_time_stamp);
st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT,
prev_top_at_mark_start(), next_top_at_mark_start());
G1OffsetTableContigSpace::print_on(st);
}