stacktrace.hh revision 2665:a124942bacb8 
1/*
2 * Copyright (c) 2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Korey Sewell
29 */
30
31#ifndef __ARCH_ALPHA_STACKTRACE_HH__
32#define __ARCH_ALPHA_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36
37class ExecContext;
38class StackTrace;
39
40class ProcessInfo
41{
42  private:
43    ExecContext *xc;
44
45    int thread_info_size;
46    int task_struct_size;
47    int task_off;
48    int pid_off;
49    int name_off;
50
51  public:
52    ProcessInfo(ExecContext *_xc);
53
54    Addr task(Addr ksp) const;
55    int pid(Addr ksp) const;
56    std::string name(Addr ksp) const;
57};
58
59class StackTrace
60{
61  protected:
62    typedef TheISA::MachInst MachInst;
63  private:
64    ExecContext *xc;
65    std::vector<Addr> stack;
66
67  private:
68    bool isEntry(Addr addr);
69    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
70    bool decodeSave(MachInst inst, int &reg, int &disp);
71    bool decodeStack(MachInst inst, int &disp);
72
73    void trace(ExecContext *xc, bool is_call);
74
75  public:
76    StackTrace();
77    StackTrace(ExecContext *xc, StaticInstPtr inst);
78    ~StackTrace();
79
80    void clear()
81    {
82        xc = 0;
83        stack.clear();
84    }
85
86    bool valid() const { return xc != NULL; }
87    bool trace(ExecContext *xc, StaticInstPtr inst);
88
89  public:
90    const std::vector<Addr> &getstack() const { return stack; }
91
92    static const int user = 1;
93    static const int console = 2;
94    static const int unknown = 3;
95
96#if TRACING_ON
97  private:
98    void dump();
99
100  public:
101    void dprintf() { if (DTRACE(Stack)) dump(); }
102#else
103  public:
104    void dprintf() {}
105#endif
106};
107
108inline bool
109StackTrace::trace(ExecContext *xc, StaticInstPtr inst)
110{
111    if (!inst->isCall() && !inst->isReturn())
112        return false;
113
114    if (valid())
115        clear();
116
117    trace(xc, !inst->isReturn());
118    return true;
119}
120
121#endif // __ARCH_ALPHA_STACKTRACE_HH__
122