Record profiling information before Jitting.
- Add a new instrumentation kind to record dynamic invokes.
- Use the JNI entry point field to store the profiling data.
- Record seen receivers for every dynamic invoke.
Change-Id: I2c1738ab2a72052d45964d055dc16b44b906e54c
diff --git a/runtime/jit/profiling_info.h b/runtime/jit/profiling_info.h
new file mode 100644
index 0000000..73ca41a
--- /dev/null
+++ b/runtime/jit/profiling_info.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_JIT_PROFILING_INFO_H_
+#define ART_RUNTIME_JIT_PROFILING_INFO_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "gc_root.h"
+
+namespace art {
+
+class ArtMethod;
+
+namespace mirror {
+class Class;
+}
+
+/**
+ * Profiling info for a method, created and filled by the interpreter once the
+ * method is warm, and used by the compiler to drive optimizations.
+ */
+class ProfilingInfo {
+ public:
+ static ProfilingInfo* Create(ArtMethod* method);
+
+ // Add information from an executed INVOKE instruction to the profile.
+ void AddInvokeInfo(Thread* self, uint32_t dex_pc, mirror::Class* cls);
+
+ // NO_THREAD_SAFETY_ANALYSIS since we don't know what the callback requires.
+ template<typename RootVisitorType>
+ void VisitRoots(RootVisitorType& visitor) NO_THREAD_SAFETY_ANALYSIS {
+ for (size_t i = 0; i < number_of_inline_caches_; ++i) {
+ InlineCache* cache = &cache_[i];
+ for (size_t j = 0; j < InlineCache::kIndividualCacheSize; ++j) {
+ visitor.VisitRootIfNonNull(cache->classes_[j].AddressWithoutBarrier());
+ }
+ }
+ }
+
+ private:
+ // Structure to store the classes seen at runtime for a specific instruction.
+ // Once the classes_ array is full, we consider the INVOKE to be megamorphic.
+ struct InlineCache {
+ bool IsMonomorphic() const {
+ DCHECK_GE(kIndividualCacheSize, 2);
+ return !classes_[0].IsNull() && classes_[1].IsNull();
+ }
+
+ bool IsMegamorphic() const {
+ for (size_t i = 0; i < kIndividualCacheSize; ++i) {
+ if (classes_[i].IsNull()) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ bool IsUnitialized() const {
+ return classes_[0].IsNull();
+ }
+
+ bool IsPolymorphic() const {
+ DCHECK_GE(kIndividualCacheSize, 3);
+ return !classes_[1].IsNull() && classes_[kIndividualCacheSize - 1].IsNull();
+ }
+
+ static constexpr uint16_t kIndividualCacheSize = 5;
+ uint32_t dex_pc;
+ GcRoot<mirror::Class> classes_[kIndividualCacheSize];
+ };
+
+ explicit ProfilingInfo(const std::vector<uint32_t>& entries)
+ : number_of_inline_caches_(entries.size()) {
+ memset(&cache_, 0, number_of_inline_caches_ * sizeof(InlineCache));
+ for (size_t i = 0; i < number_of_inline_caches_; ++i) {
+ cache_[i].dex_pc = entries[i];
+ }
+ }
+
+ // Number of instructions we are profiling in the ArtMethod.
+ const uint32_t number_of_inline_caches_;
+
+ // Dynamically allocated array of size `number_of_inline_caches_`.
+ InlineCache cache_[0];
+
+ DISALLOW_COPY_AND_ASSIGN(ProfilingInfo);
+};
+
+} // namespace art
+
+#endif // ART_RUNTIME_JIT_PROFILING_INFO_H_