stacktrace.hh revision 6691:cd68b6ecd68d 
1/*
2 * Copyright (c) 2005 The Regents of The University of Michigan
3 * Copyright (c) 2007-2008 The Florida State University
4 * Copyright (c) 2009 The University of Edinburgh
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met: redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer;
11 * redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution;
14 * neither the name of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Authors: Ali Saidi
31 *          Stephen Hines
32 *          Timothy M. Jones
33 */
34
35#ifndef __ARCH_POWER_STACKTRACE_HH__
36#define __ARCH_POWER_STACKTRACE_HH__
37
38#include "base/trace.hh"
39#include "cpu/static_inst.hh"
40
41class ThreadContext;
42class StackTrace;
43
44namespace PowerISA
45{
46
47class ProcessInfo
48{
49  private:
50    ThreadContext *tc;
51
52    int thread_info_size;
53    int task_struct_size;
54    int task_off;
55    int pid_off;
56    int name_off;
57
58  public:
59    ProcessInfo(ThreadContext *_tc);
60
61    Addr task(Addr ksp) const;
62    int pid(Addr ksp) const;
63    std::string name(Addr ksp) const;
64};
65
66class StackTrace
67{
68  protected:
69    typedef TheISA::MachInst MachInst;
70  private:
71    ThreadContext *tc;
72    std::vector<Addr> stack;
73
74  private:
75    bool isEntry(Addr addr);
76    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
77    bool decodeSave(MachInst inst, int &reg, int &disp);
78    bool decodeStack(MachInst inst, int &disp);
79
80    void trace(ThreadContext *tc, bool is_call);
81
82  public:
83    StackTrace();
84    StackTrace(ThreadContext *tc, StaticInstPtr inst);
85    ~StackTrace();
86
87    void
88    clear()
89    {
90        tc = 0;
91        stack.clear();
92    }
93
94    bool
95    valid() const
96    {
97        return tc != NULL;
98    }
99
100    bool trace(ThreadContext *tc, StaticInstPtr inst);
101
102  public:
103    const std::vector<Addr> &
104    getstack() const
105    {
106        return stack;
107    }
108
109    static const int user = 1;
110    static const int console = 2;
111    static const int unknown = 3;
112
113#if TRACING_ON
114  private:
115    void dump();
116
117  public:
118    void
119    dprintf()
120    {
121        if (DTRACE(Stack))
122            dump();
123    }
124#else
125  public:
126    void
127    dprintf()
128    {
129    }
130#endif
131};
132
133inline bool
134StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
135{
136    if (!inst->isCall() && !inst->isReturn())
137        return false;
138
139    if (valid())
140        clear();
141
142    trace(tc, !inst->isReturn());
143    return true;
144}
145
146} // PowerISA namespace
147
148#endif // __ARCH_POWER_STACKTRACE_HH__
149