xray_interface_internal.h
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//===-- xray_interface_internal.h -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of XRay, a dynamic runtime instrumentation system.
//
// Implementation of the API functions. See also include/xray/xray_interface.h.
//
//===----------------------------------------------------------------------===//
#ifndef XRAY_INTERFACE_INTERNAL_H
#define XRAY_INTERFACE_INTERNAL_H
#include "sanitizer_common/sanitizer_platform.h"
#include "xray/xray_interface.h"
#include <cstddef>
#include <cstdint>
extern "C" {
struct XRaySledEntry {
#if SANITIZER_WORDSIZE == 64
uint64_t Address;
uint64_t Function;
unsigned char Kind;
unsigned char AlwaysInstrument;
unsigned char Version;
unsigned char Padding[13]; // Need 32 bytes
uint64_t function() const {
if (Version < 2)
return Function;
// The target address is relative to the location of the Function variable.
return reinterpret_cast<uint64_t>(&Function) + Function;
}
uint64_t address() const {
if (Version < 2)
return Address;
// The target address is relative to the location of the Address variable.
return reinterpret_cast<uint64_t>(&Address) + Address;
}
#elif SANITIZER_WORDSIZE == 32
uint32_t Address;
uint32_t Function;
unsigned char Kind;
unsigned char AlwaysInstrument;
unsigned char Version;
unsigned char Padding[5]; // Need 16 bytes
uint32_t function() const {
if (Version < 2)
return Function;
// The target address is relative to the location of the Function variable.
return reinterpret_cast<uint32_t>(&Function) + Function;
}
uint32_t address() const {
if (Version < 2)
return Address;
// The target address is relative to the location of the Address variable.
return reinterpret_cast<uint32_t>(&Address) + Address;
}
#else
#error "Unsupported word size."
#endif
};
struct XRayFunctionSledIndex {
const XRaySledEntry *Begin;
const XRaySledEntry *End;
};
}
namespace __xray {
struct XRaySledMap {
const XRaySledEntry *Sleds;
size_t Entries;
const XRayFunctionSledIndex *SledsIndex;
size_t Functions;
};
bool patchFunctionEntry(bool Enable, uint32_t FuncId, const XRaySledEntry &Sled,
void (*Trampoline)());
bool patchFunctionExit(bool Enable, uint32_t FuncId, const XRaySledEntry &Sled);
bool patchFunctionTailExit(bool Enable, uint32_t FuncId,
const XRaySledEntry &Sled);
bool patchCustomEvent(bool Enable, uint32_t FuncId, const XRaySledEntry &Sled);
bool patchTypedEvent(bool Enable, uint32_t FuncId, const XRaySledEntry &Sled);
} // namespace __xray
extern "C" {
// The following functions have to be defined in assembler, on a per-platform
// basis. See xray_trampoline_*.S files for implementations.
extern void __xray_FunctionEntry();
extern void __xray_FunctionExit();
extern void __xray_FunctionTailExit();
extern void __xray_ArgLoggerEntry();
extern void __xray_CustomEvent();
extern void __xray_TypedEvent();
}
#endif