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/*
* (C) 2016 by Computer System Laboratory, IIS, Academia Sinica, Taiwan.
* See COPYRIGHT in top-level directory.
*/
#ifndef __TRACE_H
#define __TRACE_H
#include <vector>
#include <iostream>
#include "qemu-types.h"
#include "optimization.h"
#include "utils.h"
/*
* Base processor tracer
*/
class BaseTracer {
public:
CPUArchState *Env;
void *Perf;
BaseTracer(CPUArchState *env) : Env(env), Perf(nullptr) {}
virtual ~BaseTracer() {}
virtual void Reset() {}
virtual void Record(uintptr_t next_tb, TranslationBlock *tb) {}
/* Create and return the tracer object based on LLVM_MODE. */
static BaseTracer *CreateTracer(CPUArchState *env);
/* Release the trace resources. */
static void DeleteTracer(CPUArchState *env);
};
/*
* Trace of a single basic block
*/
class SingleBlockTracer : public BaseTracer {
TranslationBlock *TB;
public:
SingleBlockTracer(CPUArchState *env);
void Record(uintptr_t next_tb, TranslationBlock *tb) override;
};
/*
* Trace with NET trace formation algorithm
*/
#define NET_PROFILE_THRESHOLD 50
#if defined(CONFIG_SOFTMMU)
# define NET_PREDICT_THRESHOLD 16
#else
# define NET_PREDICT_THRESHOLD 64
#endif
class NETTracer : public BaseTracer {
bool isTraceHead(uintptr_t next_tb, TranslationBlock *tb, bool NewTB);
public:
typedef std::vector<TranslationBlock *> TBVec;
TBVec TBs;
NETTracer(CPUArchState *env, int Mode);
~NETTracer();
void Reset() override;
void Record(uintptr_t next_tb, TranslationBlock *tb) override;
inline void Profile(TranslationBlock *tb);
inline void Predict(TranslationBlock *tb);
};
/* Return the address of the patch point to the trace code. */
static inline uintptr_t tb_get_jmp_entry(TranslationBlock *tb) {
return (uintptr_t)tb->tc_ptr + tb->patch_jmp;
}
/* Return the initial jump target address of the patch point. */
static inline uintptr_t tb_get_jmp_next(TranslationBlock *tb) {
return (uintptr_t)tb->tc_ptr + tb->patch_next;
}
static inline SingleBlockTracer &getSingleBlockTracer(CPUArchState *env) {
return *static_cast<SingleBlockTracer *>(cpu_get_tracer(env));
}
static inline NETTracer &getNETTracer(CPUArchState *env) {
return *static_cast<NETTracer *>(cpu_get_tracer(env));
}
static inline void delete_image(TranslationBlock *tb)
{
#if defined(CONFIG_LLVM) && defined(CONFIG_SOFTMMU)
delete (char *)tb->image;
tb->image = nullptr;
#endif
}
static inline bool update_tb_mode(TranslationBlock *tb, int from, int to) {
if (tb->mode != from)
return false;
return Atomic<int>::testandset(&tb->mode, from, to);
}
#endif
/*
* vim: ts=8 sts=4 sw=4 expandtab
*/
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