stacktrace.hh revision 1977 
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  private:
41    ExecContext *xc;
42
43    int thread_info_size;
44    int task_struct_size;
45    int task_off;
46    int pid_off;
47    int name_off;
48
49  public:
50    ProcessInfo(ExecContext *_xc);
51
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  private:
60    ExecContext *xc;
61    std::vector<Addr> stack;
62
63  private:
64    bool isEntry(Addr addr);
65    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
66    bool decodeSave(MachInst inst, int &reg, int &disp);
67    bool decodeStack(MachInst inst, int &disp);
68
69    void trace(ExecContext *xc, bool is_call);
70
71  public:
72    StackTrace();
73    StackTrace(ExecContext *xc, StaticInstPtr<TheISA> inst);
74    ~StackTrace();
75
76    void clear()
77    {
78        xc = 0;
79        stack.clear();
80    }
81
82    bool valid() const { return xc != NULL; }
83    bool trace(ExecContext *xc, StaticInstPtr<TheISA> inst);
84
85  public:
86    const std::vector<Addr> &getstack() const { return stack; }
87
88    static const int user = 1;
89    static const int console = 2;
90    static const int unknown = 3;
91
92#if TRACING_ON
93  private:
94    void dump();
95
96  public:
97    void dprintf() { if (DTRACE(Stack)) dump(); }
98#else
99  public:
100    void dprintf() {}
101#endif
102};
103
104inline bool
105StackTrace::trace(ExecContext *xc, StaticInstPtr<TheISA> inst)
106{
107    if (!inst->isCall() && !inst->isReturn())
108        return false;
109
110    if (valid())
111        clear();
112
113    trace(xc, !inst->isReturn());
114    return true;
115}
116
117#endif // __ARCH_ALPHA_STACKTRACE_HH__
118