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-rw-r--r--runtime/class_table.cc168
1 files changed, 138 insertions, 30 deletions
diff --git a/runtime/class_table.cc b/runtime/class_table.cc
index 909511c018..0891d3f9f5 100644
--- a/runtime/class_table.cc
+++ b/runtime/class_table.cc
@@ -17,6 +17,7 @@
#include "class_table.h"
#include "mirror/class-inl.h"
+#include "oat_file.h"
namespace art {
@@ -31,10 +32,11 @@ void ClassTable::FreezeSnapshot() {
classes_.push_back(ClassSet());
}
-bool ClassTable::Contains(mirror::Class* klass) {
+bool ClassTable::Contains(ObjPtr<mirror::Class> klass) {
ReaderMutexLock mu(Thread::Current(), lock_);
+ TableSlot slot(klass);
for (ClassSet& class_set : classes_) {
- auto it = class_set.Find(GcRoot<mirror::Class>(klass));
+ auto it = class_set.Find(slot);
if (it != class_set.end()) {
return it->Read() == klass;
}
@@ -42,10 +44,11 @@ bool ClassTable::Contains(mirror::Class* klass) {
return false;
}
-mirror::Class* ClassTable::LookupByDescriptor(mirror::Class* klass) {
+mirror::Class* ClassTable::LookupByDescriptor(ObjPtr<mirror::Class> klass) {
ReaderMutexLock mu(Thread::Current(), lock_);
+ TableSlot slot(klass);
for (ClassSet& class_set : classes_) {
- auto it = class_set.Find(GcRoot<mirror::Class>(klass));
+ auto it = class_set.Find(slot);
if (it != class_set.end()) {
return it->Read();
}
@@ -53,13 +56,20 @@ mirror::Class* ClassTable::LookupByDescriptor(mirror::Class* klass) {
return nullptr;
}
+// To take into account http://b/35845221
+#pragma clang diagnostic push
+#if __clang_major__ < 4
+#pragma clang diagnostic ignored "-Wunreachable-code"
+#endif
+
mirror::Class* ClassTable::UpdateClass(const char* descriptor, mirror::Class* klass, size_t hash) {
WriterMutexLock mu(Thread::Current(), lock_);
// Should only be updating latest table.
- auto existing_it = classes_.back().FindWithHash(descriptor, hash);
+ DescriptorHashPair pair(descriptor, hash);
+ auto existing_it = classes_.back().FindWithHash(pair, hash);
if (kIsDebugBuild && existing_it == classes_.back().end()) {
for (const ClassSet& class_set : classes_) {
- if (class_set.FindWithHash(descriptor, hash) != class_set.end()) {
+ if (class_set.FindWithHash(pair, hash) != class_set.end()) {
LOG(FATAL) << "Updating class found in frozen table " << descriptor;
}
}
@@ -73,11 +83,38 @@ mirror::Class* ClassTable::UpdateClass(const char* descriptor, mirror::Class* kl
VerifyObject(klass);
// Update the element in the hash set with the new class. This is safe to do since the descriptor
// doesn't change.
- *existing_it = GcRoot<mirror::Class>(klass);
+ *existing_it = TableSlot(klass, hash);
return existing;
}
-size_t ClassTable::NumZygoteClasses() const {
+#pragma clang diagnostic pop
+
+size_t ClassTable::CountDefiningLoaderClasses(ObjPtr<mirror::ClassLoader> defining_loader,
+ const ClassSet& set) const {
+ size_t count = 0;
+ for (const TableSlot& root : set) {
+ if (root.Read()->GetClassLoader() == defining_loader) {
+ ++count;
+ }
+ }
+ return count;
+}
+
+size_t ClassTable::NumZygoteClasses(ObjPtr<mirror::ClassLoader> defining_loader) const {
+ ReaderMutexLock mu(Thread::Current(), lock_);
+ size_t sum = 0;
+ for (size_t i = 0; i < classes_.size() - 1; ++i) {
+ sum += CountDefiningLoaderClasses(defining_loader, classes_[i]);
+ }
+ return sum;
+}
+
+size_t ClassTable::NumNonZygoteClasses(ObjPtr<mirror::ClassLoader> defining_loader) const {
+ ReaderMutexLock mu(Thread::Current(), lock_);
+ return CountDefiningLoaderClasses(defining_loader, classes_.back());
+}
+
+size_t ClassTable::NumReferencedZygoteClasses() const {
ReaderMutexLock mu(Thread::Current(), lock_);
size_t sum = 0;
for (size_t i = 0; i < classes_.size() - 1; ++i) {
@@ -86,40 +123,70 @@ size_t ClassTable::NumZygoteClasses() const {
return sum;
}
-size_t ClassTable::NumNonZygoteClasses() const {
+size_t ClassTable::NumReferencedNonZygoteClasses() const {
ReaderMutexLock mu(Thread::Current(), lock_);
return classes_.back().Size();
}
mirror::Class* ClassTable::Lookup(const char* descriptor, size_t hash) {
+ DescriptorHashPair pair(descriptor, hash);
ReaderMutexLock mu(Thread::Current(), lock_);
for (ClassSet& class_set : classes_) {
- auto it = class_set.FindWithHash(descriptor, hash);
+ auto it = class_set.FindWithHash(pair, hash);
if (it != class_set.end()) {
- return it->Read();
+ return it->Read();
}
}
return nullptr;
}
-void ClassTable::Insert(mirror::Class* klass) {
+ObjPtr<mirror::Class> ClassTable::TryInsert(ObjPtr<mirror::Class> klass) {
+ TableSlot slot(klass);
+ WriterMutexLock mu(Thread::Current(), lock_);
+ for (ClassSet& class_set : classes_) {
+ auto it = class_set.Find(slot);
+ if (it != class_set.end()) {
+ return it->Read();
+ }
+ }
+ classes_.back().Insert(slot);
+ return klass;
+}
+
+void ClassTable::Insert(ObjPtr<mirror::Class> klass) {
+ const uint32_t hash = TableSlot::HashDescriptor(klass);
WriterMutexLock mu(Thread::Current(), lock_);
- classes_.back().Insert(GcRoot<mirror::Class>(klass));
+ classes_.back().InsertWithHash(TableSlot(klass, hash), hash);
+}
+
+void ClassTable::CopyWithoutLocks(const ClassTable& source_table) {
+ if (kIsDebugBuild) {
+ for (ClassSet& class_set : classes_) {
+ CHECK(class_set.Empty());
+ }
+ }
+ for (const ClassSet& class_set : source_table.classes_) {
+ for (const TableSlot& slot : class_set) {
+ classes_.back().Insert(slot);
+ }
+ }
}
-void ClassTable::InsertWithoutLocks(mirror::Class* klass) {
- classes_.back().Insert(GcRoot<mirror::Class>(klass));
+void ClassTable::InsertWithoutLocks(ObjPtr<mirror::Class> klass) {
+ const uint32_t hash = TableSlot::HashDescriptor(klass);
+ classes_.back().InsertWithHash(TableSlot(klass, hash), hash);
}
-void ClassTable::InsertWithHash(mirror::Class* klass, size_t hash) {
+void ClassTable::InsertWithHash(ObjPtr<mirror::Class> klass, size_t hash) {
WriterMutexLock mu(Thread::Current(), lock_);
- classes_.back().InsertWithHash(GcRoot<mirror::Class>(klass), hash);
+ classes_.back().InsertWithHash(TableSlot(klass, hash), hash);
}
bool ClassTable::Remove(const char* descriptor) {
+ DescriptorHashPair pair(descriptor, ComputeModifiedUtf8Hash(descriptor));
WriterMutexLock mu(Thread::Current(), lock_);
for (ClassSet& class_set : classes_) {
- auto it = class_set.Find(descriptor);
+ auto it = class_set.Find(pair);
if (it != class_set.end()) {
class_set.Erase(it);
return true;
@@ -128,29 +195,37 @@ bool ClassTable::Remove(const char* descriptor) {
return false;
}
-uint32_t ClassTable::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& root)
+uint32_t ClassTable::ClassDescriptorHashEquals::operator()(const TableSlot& slot)
const {
std::string temp;
- return ComputeModifiedUtf8Hash(root.Read()->GetDescriptor(&temp));
+ return ComputeModifiedUtf8Hash(slot.Read()->GetDescriptor(&temp));
}
-bool ClassTable::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& a,
- const GcRoot<mirror::Class>& b) const {
- DCHECK_EQ(a.Read()->GetClassLoader(), b.Read()->GetClassLoader());
+bool ClassTable::ClassDescriptorHashEquals::operator()(const TableSlot& a,
+ const TableSlot& b) const {
+ if (a.Hash() != b.Hash()) {
+ std::string temp;
+ DCHECK(!a.Read()->DescriptorEquals(b.Read()->GetDescriptor(&temp)));
+ return false;
+ }
std::string temp;
return a.Read()->DescriptorEquals(b.Read()->GetDescriptor(&temp));
}
-bool ClassTable::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& a,
- const char* descriptor) const {
- return a.Read()->DescriptorEquals(descriptor);
+bool ClassTable::ClassDescriptorHashEquals::operator()(const TableSlot& a,
+ const DescriptorHashPair& b) const {
+ if (!a.MaskedHashEquals(b.second)) {
+ DCHECK(!a.Read()->DescriptorEquals(b.first));
+ return false;
+ }
+ return a.Read()->DescriptorEquals(b.first);
}
-uint32_t ClassTable::ClassDescriptorHashEquals::operator()(const char* descriptor) const {
- return ComputeModifiedUtf8Hash(descriptor);
+uint32_t ClassTable::ClassDescriptorHashEquals::operator()(const DescriptorHashPair& pair) const {
+ return ComputeModifiedUtf8Hash(pair.first);
}
-bool ClassTable::InsertStrongRoot(mirror::Object* obj) {
+bool ClassTable::InsertStrongRoot(ObjPtr<mirror::Object> obj) {
WriterMutexLock mu(Thread::Current(), lock_);
DCHECK(obj != nullptr);
for (GcRoot<mirror::Object>& root : strong_roots_) {
@@ -159,6 +234,29 @@ bool ClassTable::InsertStrongRoot(mirror::Object* obj) {
}
}
strong_roots_.push_back(GcRoot<mirror::Object>(obj));
+ // If `obj` is a dex cache associated with a new oat file with GC roots, add it to oat_files_.
+ if (obj->IsDexCache()) {
+ const DexFile* dex_file = ObjPtr<mirror::DexCache>::DownCast(obj)->GetDexFile();
+ if (dex_file != nullptr && dex_file->GetOatDexFile() != nullptr) {
+ const OatFile* oat_file = dex_file->GetOatDexFile()->GetOatFile();
+ if (oat_file != nullptr && !oat_file->GetBssGcRoots().empty()) {
+ InsertOatFileLocked(oat_file); // Ignore return value.
+ }
+ }
+ }
+ return true;
+}
+
+bool ClassTable::InsertOatFile(const OatFile* oat_file) {
+ WriterMutexLock mu(Thread::Current(), lock_);
+ return InsertOatFileLocked(oat_file);
+}
+
+bool ClassTable::InsertOatFileLocked(const OatFile* oat_file) {
+ if (ContainsElement(oat_files_, oat_file)) {
+ return false;
+ }
+ oat_files_.push_back(oat_file);
return true;
}
@@ -168,7 +266,7 @@ size_t ClassTable::WriteToMemory(uint8_t* ptr) const {
// Combine all the class sets in case there are multiple, also adjusts load factor back to
// default in case classes were pruned.
for (const ClassSet& class_set : classes_) {
- for (const GcRoot<mirror::Class>& root : class_set) {
+ for (const TableSlot& root : class_set) {
combined.Insert(root);
}
}
@@ -195,6 +293,16 @@ void ClassTable::AddClassSet(ClassSet&& set) {
void ClassTable::ClearStrongRoots() {
WriterMutexLock mu(Thread::Current(), lock_);
+ oat_files_.clear();
strong_roots_.clear();
}
+
+ClassTable::TableSlot::TableSlot(ObjPtr<mirror::Class> klass)
+ : TableSlot(klass, HashDescriptor(klass)) {}
+
+uint32_t ClassTable::TableSlot::HashDescriptor(ObjPtr<mirror::Class> klass) {
+ std::string temp;
+ return ComputeModifiedUtf8Hash(klass->GetDescriptor(&temp));
+}
+
} // namespace art
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-07 06:21:20 +0000