stacktrace.hh revision 2239 
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281196Shsul@eecs.umich.edu
291196Shsul@eecs.umich.edu#ifndef __ARCH_ALPHA_STACKTRACE_HH__
301196Shsul@eecs.umich.edu#define __ARCH_ALPHA_STACKTRACE_HH__
311196Shsul@eecs.umich.edu
321196Shsul@eecs.umich.edu#include "base/trace.hh"
331196Shsul@eecs.umich.edu#include "cpu/static_inst.hh"
341196Shsul@eecs.umich.edu
351196Shsul@eecs.umich.educlass ExecContext;
361196Shsul@eecs.umich.educlass StackTrace;
371196Shsul@eecs.umich.edu
381196Shsul@eecs.umich.educlass ProcessInfo
391196Shsul@eecs.umich.edu{
401196Shsul@eecs.umich.edu  private:
411196Shsul@eecs.umich.edu    ExecContext *xc;
421196Shsul@eecs.umich.edu
431196Shsul@eecs.umich.edu    int thread_info_size;
441196Shsul@eecs.umich.edu    int task_struct_size;
451196Shsul@eecs.umich.edu    int task_off;
461196Shsul@eecs.umich.edu    int pid_off;
471196Shsul@eecs.umich.edu    int name_off;
481196Shsul@eecs.umich.edu
491196Shsul@eecs.umich.edu  public:
501196Shsul@eecs.umich.edu    ProcessInfo(ExecContext *_xc);
511196Shsul@eecs.umich.edu
52    Addr task(Addr ksp) const;
53    int pid(Addr ksp) const;
54    std::string name(Addr ksp) const;
55};
56
57class StackTrace
58{
59  protected:
60    typedef TheISA::MachInst MachInst;
61  private:
62    ExecContext *xc;
63    std::vector<Addr> stack;
64
65  private:
66    bool isEntry(Addr addr);
67    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
68    bool decodeSave(MachInst inst, int &reg, int &disp);
69    bool decodeStack(MachInst inst, int &disp);
70
71    void trace(ExecContext *xc, bool is_call);
72
73  public:
74    StackTrace();
75    StackTrace(ExecContext *xc, StaticInstPtr inst);
76    ~StackTrace();
77
78    void clear()
79    {
80        xc = 0;
81        stack.clear();
82    }
83
84    bool valid() const { return xc != NULL; }
85    bool trace(ExecContext *xc, StaticInstPtr inst);
86
87  public:
88    const std::vector<Addr> &getstack() const { return stack; }
89
90    static const int user = 1;
91    static const int console = 2;
92    static const int unknown = 3;
93
94#if TRACING_ON
95  private:
96    void dump();
97
98  public:
99    void dprintf() { if (DTRACE(Stack)) dump(); }
100#else
101  public:
102    void dprintf() {}
103#endif
104};
105
106inline bool
107StackTrace::trace(ExecContext *xc, StaticInstPtr inst)
108{
109    if (!inst->isCall() && !inst->isReturn())
110        return false;
111
112    if (valid())
113        clear();
114
115    trace(xc, !inst->isReturn());
116    return true;
117}
118
119#endif // __ARCH_ALPHA_STACKTRACE_HH__
120