stacktrace.hh revision 6019:76890d8b28f5 
1/*
2 * Copyright (c) 2005 The Regents of The University of Michigan
3 * Copyright (c) 2007-2008 The Florida State University
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Ali Saidi
30 *          Stephen Hines
31 */
32
33#ifndef __ARCH_ARM_STACKTRACE_HH__
34#define __ARCH_ARM_STACKTRACE_HH__
35
36#include "base/trace.hh"
37#include "cpu/static_inst.hh"
38
39class ThreadContext;
40class StackTrace;
41
42namespace ArmISA
43{
44
45class ProcessInfo
46{
47  private:
48    ThreadContext *tc;
49
50    int thread_info_size;
51    int task_struct_size;
52    int task_off;
53    int pid_off;
54    int name_off;
55
56  public:
57    ProcessInfo(ThreadContext *_tc);
58
59    Addr task(Addr ksp) const;
60    int pid(Addr ksp) const;
61    std::string name(Addr ksp) const;
62};
63
64class StackTrace
65{
66  protected:
67    typedef TheISA::MachInst MachInst;
68  private:
69    ThreadContext *tc;
70    std::vector<Addr> stack;
71
72  private:
73    bool isEntry(Addr addr);
74    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
75    bool decodeSave(MachInst inst, int &reg, int &disp);
76    bool decodeStack(MachInst inst, int &disp);
77
78    void trace(ThreadContext *tc, bool is_call);
79
80  public:
81    StackTrace();
82    StackTrace(ThreadContext *tc, StaticInstPtr inst);
83    ~StackTrace();
84
85    void clear()
86    {
87        tc = 0;
88        stack.clear();
89    }
90
91    bool valid() const { return tc != NULL; }
92    bool trace(ThreadContext *tc, StaticInstPtr inst);
93
94  public:
95    const std::vector<Addr> &getstack() const { return stack; }
96
97    static const int user = 1;
98    static const int console = 2;
99    static const int unknown = 3;
100
101#if TRACING_ON
102  private:
103    void dump();
104
105  public:
106    void dprintf() { if (DTRACE(Stack)) dump(); }
107#else
108  public:
109    void dprintf() {}
110#endif
111};
112
113inline bool
114StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
115{
116    if (!inst->isCall() && !inst->isReturn())
117        return false;
118
119    if (valid())
120        clear();
121
122    trace(tc, !inst->isReturn());
123    return true;
124}
125
126}
127
128#endif // __ARCH_ARM_STACKTRACE_HH__
129