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