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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_CODEGEN_SAFEPOINT_TABLE_BASE_H_
#define V8_CODEGEN_SAFEPOINT_TABLE_BASE_H_
#include <cstdint>
#include "src/base/logging.h"
namespace v8 {
namespace internal {
class SafepointEntryBase {
public:
static constexpr int kNoDeoptIndex = -1;
static constexpr int kNoTrampolinePC = -1;
SafepointEntryBase() = default;
SafepointEntryBase(int pc, int deopt_index, int trampoline_pc)
: pc_(pc), deopt_index_(deopt_index), trampoline_pc_(trampoline_pc) {
DCHECK(is_initialized());
}
bool is_initialized() const { return pc_ != 0; }
int pc() const {
DCHECK(is_initialized());
return pc_;
}
int trampoline_pc() const { return trampoline_pc_; }
bool has_deoptimization_index() const {
return deopt_index_ != kNoDeoptIndex;
}
int deoptimization_index() const {
DCHECK(has_deoptimization_index());
return deopt_index_;
}
void Reset() { pc_ = 0; }
protected:
bool operator==(const SafepointEntryBase& other) const {
return pc_ == other.pc_ && deopt_index_ == other.deopt_index_ &&
trampoline_pc_ == other.trampoline_pc_;
}
private:
int pc_ = 0;
int deopt_index_ = kNoDeoptIndex;
int trampoline_pc_ = kNoTrampolinePC;
};
class SafepointTableBuilderBase {
public:
bool emitted() const {
return safepoint_table_offset_ != kNoSafepointTableOffset;
}
int safepoint_table_offset() const {
DCHECK(emitted());
return safepoint_table_offset_;
}
protected:
void set_safepoint_table_offset(int offset) {
DCHECK(!emitted());
safepoint_table_offset_ = offset;
DCHECK(emitted());
}
private:
static constexpr int kNoSafepointTableOffset = -1;
int safepoint_table_offset_ = kNoSafepointTableOffset;
};
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_SAFEPOINT_TABLE_BASE_H_
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