archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-17 09:34:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8210754: print_location is not reliable enough (printing register info)

Browse source 
Reviewed-by: stuefe, coleenp
This commit is contained in:
Martin Doerr 2018-10-04 16:39:07 +02:00
parent dcfb9a75aa
commit 4af2374271
16 changed files with 298 additions and 83 deletions
Download patch file Download diff file Expand all files Collapse all files

57
src/hotspot/share/oops/oop.cpp
View file

@ -171,6 +171,63 @@ bool oopDesc::has_klass_gap() {
return UseCompressedClassPointers;
}
oop oopDesc::decode_oop_raw(narrowOop narrow_oop) {
return (oop)(void*)( (uintptr_t)Universe::narrow_oop_base() +
((uintptr_t)narrow_oop << Universe::narrow_oop_shift()));
}
void* oopDesc::load_klass_raw(oop obj) {
if (UseCompressedClassPointers) {
narrowKlass narrow_klass = *(obj->compressed_klass_addr());
if (narrow_klass == 0) return NULL;
return (void*)Klass::decode_klass_raw(narrow_klass);
} else {
return *(void**)(obj->klass_addr());
}
}
void* oopDesc::load_oop_raw(oop obj, int offset) {
uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
if (UseCompressedOops) {
narrowOop narrow_oop = *(narrowOop*)addr;
if (narrow_oop == 0) return NULL;
return (void*)decode_oop_raw(narrow_oop);
} else {
return *(void**)addr;
}
}
bool oopDesc::is_valid(oop obj) {
if (!is_object_aligned(obj)) return false;
if ((size_t)(oopDesc*)obj < os::min_page_size()) return false;
// We need at least the mark and the klass word in the committed region.
if (!os::is_readable_range(obj, (oopDesc*)obj + 1)) return false;
if (!Universe::heap()->is_in(obj)) return false;
Klass* k = (Klass*)load_klass_raw(obj);
if (!os::is_readable_range(k, k + 1)) return false;
return MetaspaceUtils::is_range_in_committed(k, k + 1);
}
oop oopDesc::oop_or_null(address addr) {
if (is_valid(oop(addr))) {
// We were just given an oop directly.
return oop(addr);
}
// Try to find addr using block_start.
HeapWord* p = Universe::heap()->block_start(addr);
if (p != NULL && Universe::heap()->block_is_obj(p)) {
if (!is_valid(oop(p))) return NULL;
return oop(p);
}
// If we can't find it it just may mean that heap wasn't parsable.
return NULL;
}
oop oopDesc::obj_field_acquire(int offset) const { return HeapAccess<MO_ACQUIRE>::oop_load_at(as_oop(), offset); }
void oopDesc::obj_field_put_raw(int offset, oop value) { RawAccess<>::oop_store_at(as_oop(), offset, value); }