upload android base code part3

android/art/runtime/oat_quick_method_header.cc

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#include "oat_quick_method_header.h"
+
+#include "art_method.h"
+#include "scoped_thread_state_change-inl.h"
+#include "thread.h"
+
+namespace art {
+
+OatQuickMethodHeader::OatQuickMethodHeader(uint32_t vmap_table_offset,
+                                           uint32_t method_info_offset,
+                                           uint32_t frame_size_in_bytes,
+                                           uint32_t core_spill_mask,
+                                           uint32_t fp_spill_mask,
+                                           uint32_t code_size)
+    : vmap_table_offset_(vmap_table_offset),
+      method_info_offset_(method_info_offset),
+      frame_info_(frame_size_in_bytes, core_spill_mask, fp_spill_mask),
+      code_size_(code_size) {}
+
+OatQuickMethodHeader::~OatQuickMethodHeader() {}
+
+uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method,
+                                       const uintptr_t pc,
+                                       bool abort_on_failure) const {
+  const void* entry_point = GetEntryPoint();
+  uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
+  if (IsOptimized()) {
+    CodeInfo code_info = GetOptimizedCodeInfo();
+    CodeInfoEncoding encoding = code_info.ExtractEncoding();
+    StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding);
+    if (stack_map.IsValid()) {
+      return stack_map.GetDexPc(encoding.stack_map.encoding);
+    }
+  } else {
+    DCHECK(method->IsNative());
+    return DexFile::kDexNoIndex;
+  }
+  if (abort_on_failure) {
+    ScopedObjectAccess soa(Thread::Current());
+    LOG(FATAL) << "Failed to find Dex offset for PC offset "
+           << reinterpret_cast<void*>(sought_offset)
+           << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point
+           << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode()
+           << ") in " << method->PrettyMethod();
+  }
+  return DexFile::kDexNoIndex;
+}
+
+uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method,
+                                                const uint32_t dex_pc,
+                                                bool is_for_catch_handler,
+                                                bool abort_on_failure) const {
+  const void* entry_point = GetEntryPoint();
+  DCHECK(!method->IsNative());
+  DCHECK(IsOptimized());
+  // Search for the dex-to-pc mapping in stack maps.
+  CodeInfo code_info = GetOptimizedCodeInfo();
+  CodeInfoEncoding encoding = code_info.ExtractEncoding();
+
+  // All stack maps are stored in the same CodeItem section, safepoint stack
+  // maps first, then catch stack maps. We use `is_for_catch_handler` to select
+  // the order of iteration.
+  StackMap stack_map =
+      LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding)
+                                   : code_info.GetStackMapForDexPc(dex_pc, encoding);
+  if (stack_map.IsValid()) {
+    return reinterpret_cast<uintptr_t>(entry_point) +
+           stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA);
+  }
+  if (abort_on_failure) {
+    ScopedObjectAccess soa(Thread::Current());
+    LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
+               << " in " << method->PrettyMethod();
+  }
+  return UINTPTR_MAX;
+}
+
+}  // namespace art