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8219459: oopDesc::is_valid() is broken

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Use Metaspace::contains() to test address ranges.

Reviewed-by: mdoerr, stuefe, jiangli
This commit is contained in:
Coleen Phillimore 2019-05-14 08:52:51 -04:00
parent 64b8734964
commit 2a48a29c33
4 changed files with 3 additions and 34 deletions
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26
src/hotspot/share/memory/metaspace.cpp
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@ -47,6 +47,7 @@
#include "utilities/debug.hpp"
#include "utilities/formatBuffer.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/vmError.hpp"
using namespace metaspace;
@ -917,31 +918,6 @@ void MetaspaceUtils::verify_metrics() {
#endif
}
// Utils to check if a pointer or range is part of a committed metaspace region.
metaspace::VirtualSpaceNode* MetaspaceUtils::find_enclosing_virtual_space(const void* p) {
MutexLocker cl(MetaspaceExpand_lock, Mutex::_no_safepoint_check_flag);
VirtualSpaceNode* vsn = Metaspace::space_list()->find_enclosing_space(p);
if (Metaspace::using_class_space() && vsn == NULL) {
vsn = Metaspace::class_space_list()->find_enclosing_space(p);
}
return vsn;
}
bool MetaspaceUtils::is_range_in_committed(const void* from, const void* to) {
#if INCLUDE_CDS
if (UseSharedSpaces) {
for (int idx = MetaspaceShared::ro; idx <= MetaspaceShared::mc; idx++) {
if (FileMapInfo::current_info()->is_in_shared_region(from, idx)) {
return FileMapInfo::current_info()->is_in_shared_region(to, idx);
}
}
}
#endif
VirtualSpaceNode* vsn = find_enclosing_virtual_space(from);
return (vsn != NULL) && vsn->contains(to);
}
// Metaspace methods
size_t Metaspace::_first_chunk_word_size = 0;

5
src/hotspot/share/memory/metaspace.hpp
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@ -329,11 +329,6 @@ class MetaspaceUtils : AllStatic {
// Helper for print_xx_report.
static void print_vs(outputStream* out, size_t scale);
// Utils to check if a pointer or range is part of a committed metaspace region
// without acquiring any locks.
static metaspace::VirtualSpaceNode* find_enclosing_virtual_space(const void* p);
static bool is_range_in_committed(const void* from, const void* to);
public:
// Collect used metaspace statistics. This involves walking the CLDG. The resulting

2
src/hotspot/share/oops/klass.cpp
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@ -813,7 +813,7 @@ bool Klass::is_valid(Klass* k) {
if ((size_t)k < os::min_page_size()) return false;
if (!os::is_readable_range(k, k + 1)) return false;
if (!MetaspaceUtils::is_range_in_committed(k, k + 1)) return false;
if (!Metaspace::contains(k)) return false;
if (!Symbol::is_valid(k->name())) return false;
return ClassLoaderDataGraph::is_valid(k->class_loader_data());

4
src/hotspot/share/oops/oop.cpp
View File

@ -182,9 +182,7 @@ bool oopDesc::is_valid(oop obj) {
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);
return Klass::is_valid(k);
}
oop oopDesc::oop_or_null(address addr) {