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8315431: ArchiveHeapWriter::get_filler_size_at() cannot handle buffer expansion

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Reviewed-by: matsaave, ccheung
This commit is contained in:
Ioi Lam 2024-05-10 20:34:17 +00:00
parent 1b476f52ba
commit 5e8e8ef656
1 changed files with 6 additions and 4 deletions
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10
src/hotspot/share/cds/archiveHeapWriter.cpp
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@ -67,8 +67,10 @@ ArchiveHeapWriter::BufferOffsetToSourceObjectTable*
ArchiveHeapWriter::_buffer_offset_to_source_obj_table = nullptr;
typedef ResourceHashtable<address, size_t,
127, // prime number
typedef ResourceHashtable<
size_t, // offset of a filler from ArchiveHeapWriter::buffer_bottom()
size_t, // size of this filler (in bytes)
127, // prime number
AnyObj::C_HEAP,
mtClassShared> FillersTable;
static FillersTable* _fillers;
@ -361,12 +363,12 @@ void ArchiveHeapWriter::maybe_fill_gc_region_gap(size_t required_byte_size) {
array_length, fill_bytes, _buffer_used);
HeapWord* filler = init_filler_array_at_buffer_top(array_length, fill_bytes);
_buffer_used = filler_end;
_fillers->put((address)filler, fill_bytes);
_fillers->put(buffered_address_to_offset((address)filler), fill_bytes);
}
}
size_t ArchiveHeapWriter::get_filler_size_at(address buffered_addr) {
size_t* p = _fillers->get(buffered_addr);
size_t* p = _fillers->get(buffered_address_to_offset(buffered_addr));
if (p != nullptr) {
assert(*p > 0, "filler must be larger than zero bytes");
return *p;