stacktrace.hh revision 2107 
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
29#ifndef __ARCH_ALPHA_STACKTRACE_HH__
30#define __ARCH_ALPHA_STACKTRACE_HH__
31
32#include "base/trace.hh"
33#include "cpu/static_inst.hh"
34
35class ExecContext;
36class StackTrace;
37
38class ProcessInfo
39{
40  protected:
41    typedef TheISA::Addr Addr;
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::Addr Addr;
63    typedef TheISA::MachInst MachInst;
64  private:
65    ExecContext *xc;
66    std::vector<Addr> stack;
67
68  private:
69    bool isEntry(Addr addr);
70    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
71    bool decodeSave(MachInst inst, int &reg, int &disp);
72    bool decodeStack(MachInst inst, int &disp);
73
74    void trace(ExecContext *xc, bool is_call);
75
76  public:
77    StackTrace();
78    StackTrace(ExecContext *xc, StaticInstPtr inst);
79    ~StackTrace();
80
81    void clear()
82    {
83        xc = 0;
84        stack.clear();
85    }
86
87    bool valid() const { return xc != NULL; }
88    bool trace(ExecContext *xc, StaticInstPtr inst);
89
90  public:
91    const std::vector<Addr> &getstack() const { return stack; }
92
93    static const int user = 1;
94    static const int console = 2;
95    static const int unknown = 3;
96
97#if TRACING_ON
98  private:
99    void dump();
100
101  public:
102    void dprintf() { if (DTRACE(Stack)) dump(); }
103#else
104  public:
105    void dprintf() {}
106#endif
107};
108
109inline bool
110StackTrace::trace(ExecContext *xc, StaticInstPtr inst)
111{
112    if (!inst->isCall() && !inst->isReturn())
113        return false;
114
115    if (valid())
116        clear();
117
118    trace(xc, !inst->isReturn());
119    return true;
120}
121
122#endif // __ARCH_ALPHA_STACKTRACE_HH__
123