Move inline method detection to runtime.
The debugger needs this for selective deoptimization.
Change-Id: I8100000449b56e619288fb05d41ea6f02b53b334
diff --git a/runtime/quick/inline_method_analyser.cc b/runtime/quick/inline_method_analyser.cc
new file mode 100644
index 0000000..4388d31
--- /dev/null
+++ b/runtime/quick/inline_method_analyser.cc
@@ -0,0 +1,303 @@
+/*
+ * Copyright (C) 2014 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 "inline_method_analyser.h"
+#include "dex_instruction.h"
+#include "dex_instruction-inl.h"
+#include "mirror/art_field.h"
+#include "mirror/art_field-inl.h"
+#include "mirror/art_method.h"
+#include "mirror/art_method-inl.h"
+#include "mirror/class.h"
+#include "mirror/class-inl.h"
+#include "mirror/dex_cache.h"
+#include "mirror/dex_cache-inl.h"
+#include "verifier/method_verifier.h"
+#include "verifier/method_verifier-inl.h"
+
+/*
+ * NOTE: This code is part of the quick compiler. It lives in the runtime
+ * only to allow the debugger to check whether a method has been inlined.
+ */
+
+namespace art {
+
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET),
+ check_iget_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_WIDE),
+ check_iget_wide_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_OBJECT),
+ check_iget_object_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_BOOLEAN),
+ check_iget_boolean_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_BYTE),
+ check_iget_byte_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_CHAR),
+ check_iget_char_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_SHORT),
+ check_iget_short_type);
+
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT),
+ check_iput_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_WIDE),
+ check_iput_wide_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_OBJECT),
+ check_iput_object_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_BOOLEAN),
+ check_iput_boolean_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_BYTE),
+ check_iput_byte_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_CHAR),
+ check_iput_char_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_SHORT),
+ check_iput_short_type);
+
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT), check_iget_iput_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_WIDE) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_WIDE), check_iget_iput_wide_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_OBJECT) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_OBJECT), check_iget_iput_object_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_BOOLEAN) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_BOOLEAN), check_iget_iput_boolean_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_BYTE) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_BYTE), check_iget_iput_byte_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_CHAR) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_CHAR), check_iget_iput_char_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_SHORT) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_SHORT), check_iget_iput_short_variant);
+
+bool InlineMethodAnalyser::AnalyseMethodCode(verifier::MethodVerifier* verifier,
+ InlineMethod* method) {
+ // We currently support only plain return or 2-instruction methods.
+
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ DCHECK_NE(code_item->insns_size_in_code_units_, 0u);
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+
+ switch (opcode) {
+ case Instruction::RETURN_VOID:
+ method->opcode = kInlineOpNop;
+ method->flags = kInlineSpecial;
+ method->d.data = 0u;
+ return true;
+ case Instruction::RETURN:
+ case Instruction::RETURN_OBJECT:
+ case Instruction::RETURN_WIDE:
+ return AnalyseReturnMethod(code_item, method);
+ case Instruction::CONST:
+ case Instruction::CONST_4:
+ case Instruction::CONST_16:
+ case Instruction::CONST_HIGH16:
+ // TODO: Support wide constants (RETURN_WIDE).
+ return AnalyseConstMethod(code_item, method);
+ case Instruction::IGET:
+ case Instruction::IGET_OBJECT:
+ case Instruction::IGET_BOOLEAN:
+ case Instruction::IGET_BYTE:
+ case Instruction::IGET_CHAR:
+ case Instruction::IGET_SHORT:
+ case Instruction::IGET_WIDE:
+ return AnalyseIGetMethod(verifier, method);
+ case Instruction::IPUT:
+ case Instruction::IPUT_OBJECT:
+ case Instruction::IPUT_BOOLEAN:
+ case Instruction::IPUT_BYTE:
+ case Instruction::IPUT_CHAR:
+ case Instruction::IPUT_SHORT:
+ case Instruction::IPUT_WIDE:
+ return AnalyseIPutMethod(verifier, method);
+ default:
+ return false;
+ }
+}
+
+bool InlineMethodAnalyser::AnalyseReturnMethod(const DexFile::CodeItem* code_item,
+ InlineMethod* result) {
+ const Instruction* return_instruction = Instruction::At(code_item->insns_);
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ uint32_t reg = return_instruction->VRegA_11x();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(reg, arg_start);
+ DCHECK_LT((return_opcode == Instruction::RETURN_WIDE) ? reg + 1 : reg,
+ code_item->registers_size_);
+
+ result->opcode = kInlineOpReturnArg;
+ result->flags = kInlineSpecial;
+ InlineReturnArgData* data = &result->d.return_data;
+ data->arg = reg - arg_start;
+ data->is_wide = (return_opcode == Instruction::RETURN_WIDE) ? 1u : 0u;
+ data->is_object = (return_opcode == Instruction::RETURN_OBJECT) ? 1u : 0u;
+ data->reserved = 0u;
+ data->reserved2 = 0u;
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseConstMethod(const DexFile::CodeItem* code_item,
+ InlineMethod* result) {
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (return_opcode != Instruction::RETURN &&
+ return_opcode != Instruction::RETURN_OBJECT) {
+ return false;
+ }
+
+ uint32_t return_reg = return_instruction->VRegA_11x();
+ DCHECK_LT(return_reg, code_item->registers_size_);
+
+ uint32_t vA, vB, dummy;
+ uint64_t dummy_wide;
+ instruction->Decode(vA, vB, dummy_wide, dummy, nullptr);
+ if (instruction->Opcode() == Instruction::CONST_HIGH16) {
+ vB <<= 16;
+ }
+ DCHECK_LT(vA, code_item->registers_size_);
+ if (vA != return_reg) {
+ return false; // Not returning the value set by const?
+ }
+ if (return_opcode == Instruction::RETURN_OBJECT && vB != 0) {
+ return false; // Returning non-null reference constant?
+ }
+ result->opcode = kInlineOpNonWideConst;
+ result->flags = kInlineSpecial;
+ result->d.data = static_cast<uint64_t>(vB);
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseIGetMethod(verifier::MethodVerifier* verifier,
+ InlineMethod* result) {
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+ DCHECK(IsInstructionIGet(opcode));
+
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (!(return_opcode == Instruction::RETURN_WIDE && opcode == Instruction::IGET_WIDE) &&
+ !(return_opcode == Instruction::RETURN_OBJECT && opcode == Instruction::IGET_OBJECT) &&
+ !(return_opcode == Instruction::RETURN && opcode != Instruction::IGET_WIDE &&
+ opcode != Instruction::IGET_OBJECT)) {
+ return false;
+ }
+
+ uint32_t return_reg = return_instruction->VRegA_11x();
+ DCHECK_LT(return_opcode == Instruction::RETURN_WIDE ? return_reg + 1 : return_reg,
+ code_item->registers_size_);
+
+ uint32_t dst_reg = instruction->VRegA_22c();
+ uint32_t object_reg = instruction->VRegB_22c();
+ uint32_t field_idx = instruction->VRegC_22c();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(object_reg, arg_start);
+ DCHECK_LT(object_reg, code_item->registers_size_);
+ DCHECK_LT(opcode == Instruction::IGET_WIDE ? dst_reg + 1 : dst_reg, code_item->registers_size_);
+ if (dst_reg != return_reg) {
+ return false; // Not returning the value retrieved by IGET?
+ }
+
+ if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
+ // TODO: Support inlining IGET on other register than "this".
+ return false;
+ }
+
+ if (!ComputeSpecialAccessorInfo(field_idx, false, verifier, &result->d.ifield_data)) {
+ return false;
+ }
+
+ result->opcode = kInlineOpIGet;
+ result->flags = kInlineSpecial;
+ InlineIGetIPutData* data = &result->d.ifield_data;
+ data->op_variant = IGetVariant(opcode);
+ data->object_arg = object_reg - arg_start; // Allow IGET on any register, not just "this".
+ data->src_arg = 0;
+ data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
+ data->reserved = 0;
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseIPutMethod(verifier::MethodVerifier* verifier,
+ InlineMethod* result) {
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+ DCHECK(IsInstructionIPut(opcode));
+
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (return_opcode != Instruction::RETURN_VOID) {
+ // TODO: Support returning an argument.
+ // This is needed by builder classes and generated accessor setters.
+ // builder.setX(value): iput value, this, fieldX; return-object this;
+ // object.access$nnn(value): iput value, this, fieldX; return value;
+ // Use InlineIGetIPutData::reserved to hold the information.
+ return false;
+ }
+
+ uint32_t src_reg = instruction->VRegA_22c();
+ uint32_t object_reg = instruction->VRegB_22c();
+ uint32_t field_idx = instruction->VRegC_22c();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(object_reg, arg_start);
+ DCHECK_LT(object_reg, code_item->registers_size_);
+ DCHECK_GE(src_reg, arg_start);
+ DCHECK_LT(opcode == Instruction::IPUT_WIDE ? src_reg + 1 : src_reg, code_item->registers_size_);
+
+ if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
+ // TODO: Support inlining IPUT on other register than "this".
+ return false;
+ }
+
+ if (!ComputeSpecialAccessorInfo(field_idx, true, verifier, &result->d.ifield_data)) {
+ return false;
+ }
+
+ result->opcode = kInlineOpIPut;
+ result->flags = kInlineSpecial;
+ InlineIGetIPutData* data = &result->d.ifield_data;
+ data->op_variant = IPutVariant(opcode);
+ data->object_arg = object_reg - arg_start; // Allow IPUT on any register, not just "this".
+ data->src_arg = src_reg - arg_start;
+ data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
+ data->reserved = 0;
+ return true;
+}
+
+bool InlineMethodAnalyser::ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put,
+ verifier::MethodVerifier* verifier,
+ InlineIGetIPutData* result) {
+ mirror::DexCache* dex_cache = verifier->GetDexCache();
+ uint32_t method_idx = verifier->GetMethodReference().dex_method_index;
+ mirror::ArtMethod* method = dex_cache->GetResolvedMethod(method_idx);
+ mirror::ArtField* field = dex_cache->GetResolvedField(field_idx);
+ if (method == nullptr || field == nullptr || field->IsStatic()) {
+ return false;
+ }
+ mirror::Class* method_class = method->GetDeclaringClass();
+ mirror::Class* field_class = field->GetDeclaringClass();
+ if (!method_class->CanAccessResolvedField(field_class, field, dex_cache, field_idx) ||
+ (is_put && field->IsFinal() && method_class != field_class)) {
+ return false;
+ }
+ DCHECK_GE(field->GetOffset().Int32Value(), 0);
+ result->field_idx = field_idx;
+ result->field_offset = field->GetOffset().Int32Value();
+ result->is_volatile = field->IsVolatile();
+ return true;
+}
+
+} // namespace art