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// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_COMPILER_STUB_CODE_COMPILER_H_
#define RUNTIME_VM_COMPILER_STUB_CODE_COMPILER_H_
#if defined(DART_PRECOMPILED_RUNTIME)
#error "AOT runtime should not use compiler sources (including header files)"
#endif // defined(DART_PRECOMPILED_RUNTIME)
#include "vm/allocation.h"
#include "vm/compiler/runtime_api.h"
#include "vm/constants.h"
#include "vm/growable_array.h"
#include "vm/stub_code_list.h"
#include "vm/tagged_pointer.h"
namespace dart {
// Forward declarations.
class Code;
namespace compiler {
// Forward declarations.
class Assembler;
// Represents an unresolved PC-relative Call/TailCall.
class UnresolvedPcRelativeCall : public ZoneAllocated {
public:
UnresolvedPcRelativeCall(intptr_t offset,
const dart::Code& target,
bool is_tail_call)
: offset_(offset), target_(target), is_tail_call_(is_tail_call) {}
intptr_t offset() const { return offset_; }
const dart::Code& target() const { return target_; }
bool is_tail_call() const { return is_tail_call_; }
private:
const intptr_t offset_;
const dart::Code& target_;
const bool is_tail_call_;
};
using UnresolvedPcRelativeCalls = GrowableArray<UnresolvedPcRelativeCall*>;
class StubCodeCompiler : public AllStatic {
public:
#if !defined(TARGET_ARCH_IA32)
static void GenerateBuildMethodExtractorStub(
Assembler* assembler,
const Object& closure_allocation_stub,
const Object& context_allocation_stub);
#endif
static ArrayPtr BuildStaticCallsTable(
Zone* zone,
compiler::UnresolvedPcRelativeCalls* unresolved_calls);
#define STUB_CODE_GENERATE(name) \
static void Generate##name##Stub(Assembler* assembler);
VM_STUB_CODE_LIST(STUB_CODE_GENERATE)
#undef STUB_CODE_GENERATE
static void GenerateAllocationStubForClass(
Assembler* assembler,
UnresolvedPcRelativeCalls* unresolved_calls,
const Class& cls,
const dart::Code& allocate_object,
const dart::Code& allocat_object_parametrized);
enum Optimized {
kUnoptimized,
kOptimized,
};
enum CallType {
kInstanceCall,
kStaticCall,
};
enum Exactness {
kCheckExactness,
kIgnoreExactness,
};
static void GenerateNArgsCheckInlineCacheStub(
Assembler* assembler,
intptr_t num_args,
const RuntimeEntry& handle_ic_miss,
Token::Kind kind,
Optimized optimized,
CallType type,
Exactness exactness);
static void GenerateNArgsCheckInlineCacheStubForEntryKind(
Assembler* assembler,
intptr_t num_args,
const RuntimeEntry& handle_ic_miss,
Token::Kind kind,
Optimized optimized,
CallType type,
Exactness exactness,
CodeEntryKind entry_kind);
static void GenerateUsageCounterIncrement(Assembler* assembler,
Register temp_reg);
static void GenerateOptimizedUsageCounterIncrement(Assembler* assembler);
#if defined(TARGET_ARCH_X64)
static constexpr intptr_t kNativeCallbackTrampolineSize = 10;
static constexpr intptr_t kNativeCallbackSharedStubSize = 217;
static constexpr intptr_t kNativeCallbackTrampolineStackDelta = 2;
#elif defined(TARGET_ARCH_IA32)
static constexpr intptr_t kNativeCallbackTrampolineSize = 10;
static constexpr intptr_t kNativeCallbackSharedStubSize = 90;
static constexpr intptr_t kNativeCallbackTrampolineStackDelta = 2;
#elif defined(TARGET_ARCH_ARM)
static constexpr intptr_t kNativeCallbackTrampolineSize = 12;
static constexpr intptr_t kNativeCallbackSharedStubSize = 140;
static constexpr intptr_t kNativeCallbackTrampolineStackDelta = 4;
#elif defined(TARGET_ARCH_ARM64)
static constexpr intptr_t kNativeCallbackTrampolineSize = 12;
static constexpr intptr_t kNativeCallbackSharedStubSize = 268;
static constexpr intptr_t kNativeCallbackTrampolineStackDelta = 2;
#endif
static void GenerateJITCallbackTrampolines(Assembler* assembler,
intptr_t next_callback_id);
// Calculates the offset (in words) from FP to the provided [cpu_register].
//
// Assumes
// * all [kDartAvailableCpuRegs] followed by saved-PC, saved-FP were
// pushed on the stack
// * [cpu_register] is in [kDartAvailableCpuRegs]
//
// The intended use of this function is to find registers on the stack which
// were spilled in the
// `StubCode::*<stub-name>Shared{With,Without}FpuRegsStub()`
static intptr_t WordOffsetFromFpToCpuRegister(Register cpu_register);
private:
// Common function for generating InitLateInstanceField and
// InitLateFinalInstanceField stubs.
static void GenerateInitLateInstanceFieldStub(Assembler* assembler,
bool is_final);
};
} // namespace compiler
enum DeoptStubKind { kLazyDeoptFromReturn, kLazyDeoptFromThrow, kEagerDeopt };
// Zap value used to indicate unused CODE_REG in deopt.
static const uword kZapCodeReg = 0xf1f1f1f1;
// Zap value used to indicate unused return address in deopt.
static const uword kZapReturnAddress = 0xe1e1e1e1;
} // namespace dart
#endif // RUNTIME_VM_COMPILER_STUB_CODE_COMPILER_H_