stacktrace.hh revision 3580:5ff9d76e0ae4 
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: Ali Saidi
29 */
30
31#ifndef __ARCH_MIPS_STACKTRACE_HH__
32#define __ARCH_MIPS_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36
37class ThreadContext;
38class StackTrace;
39
40namespace MipsISA
41{
42
43class ProcessInfo
44{
45  private:
46    ThreadContext *tc;
47
48    int thread_info_size;
49    int task_struct_size;
50    int task_off;
51    int pid_off;
52    int name_off;
53
54  public:
55    ProcessInfo(ThreadContext *_tc);
56
57    Addr task(Addr ksp) const;
58    int pid(Addr ksp) const;
59    std::string name(Addr ksp) const;
60};
61
62class StackTrace
63{
64  protected:
65    typedef TheISA::MachInst MachInst;
66  private:
67    ThreadContext *tc;
68    std::vector<Addr> stack;
69
70  private:
71    bool isEntry(Addr addr);
72    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
73    bool decodeSave(MachInst inst, int &reg, int &disp);
74    bool decodeStack(MachInst inst, int &disp);
75
76    void trace(ThreadContext *tc, bool is_call);
77
78  public:
79    StackTrace();
80    StackTrace(ThreadContext *tc, StaticInstPtr inst);
81    ~StackTrace();
82
83    void clear()
84    {
85        tc = 0;
86        stack.clear();
87    }
88
89    bool valid() const { return tc != NULL; }
90    bool trace(ThreadContext *tc, StaticInstPtr inst);
91
92  public:
93    const std::vector<Addr> &getstack() const { return stack; }
94
95    static const int user = 1;
96    static const int console = 2;
97    static const int unknown = 3;
98
99#if TRACING_ON
100  private:
101    void dump();
102
103  public:
104    void dprintf() { if (DTRACE(Stack)) dump(); }
105#else
106  public:
107    void dprintf() {}
108#endif
109};
110
111inline bool
112StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
113{
114    if (!inst->isCall() && !inst->isReturn())
115        return false;
116
117    if (valid())
118        clear();
119
120    trace(tc, !inst->isReturn());
121    return true;
122}
123
124}
125
126#endif // __ARCH_MIPS_STACKTRACE_HH__
127