71f88a955d
Summary: This change introduces versions to the instrumentation map entries we emit for XRay instrumentaiton points. The status quo for the version is currently set to 0 (as emitted by the LLVM back-end), and versions will count up to 255 (unsigned char). This change is in preparation for supporting the newer version of the custom event sleds that will be emitted by the LLVM compiler. While we're here, we take the opportunity to stash more registers and align the stack properly in the __xray_CustomEvent trampoline. Reviewers: kpw, pcc, dblaikie Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D36816 llvm-svn: 311524
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
//===-- xray_interface_internal.h -------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
#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
|
|
#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);
|
|
|
|
} // 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();
|
|
}
|
|
|
|
#endif
|