stacktrace.hh revision 5569 
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: Nathan Binkert
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 ThreadContext;
38
39namespace AlphaISA {
40
41class StackTrace;
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  private:
65    ThreadContext *tc;
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(ThreadContext *tc, bool is_call);
75
76  public:
77    StackTrace();
78    StackTrace(ThreadContext *tc, StaticInstPtr inst);
79    ~StackTrace();
80
81    void
82    clear()
83    {
84        tc = 0;
85        stack.clear();
86    }
87
88    bool valid() const { return tc != NULL; }
89    bool trace(ThreadContext *tc, StaticInstPtr inst);
90
91  public:
92    const std::vector<Addr> &getstack() const { return stack; }
93
94    static const int user = 1;
95    static const int console = 2;
96    static const int unknown = 3;
97
98#if TRACING_ON
99  private:
100    void dump();
101
102  public:
103    void dprintf() { if (DTRACE(Stack)) dump(); }
104#else
105  public:
106    void dprintf() {}
107#endif
108};
109
110inline bool
111StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
112{
113    if (!inst->isCall() && !inst->isReturn())
114        return false;
115
116    if (valid())
117        clear();
118
119    trace(tc, !inst->isReturn());
120    return true;
121}
122
123} // namespace AlphaISA
124
125#endif // __ARCH_ALPHA_STACKTRACE_HH__
126