stacktrace.hh revision 3570 
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_SPARC_STACKTRACE_HH__
32#define __ARCH_SPARC_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36
37class ThreadContext;
38namespace SparcISA
39{
40    class StackTrace;
41
42    class ProcessInfo
43    {
44      private:
45        ThreadContext *tc;
46
47        int thread_info_size;
48        int task_struct_size;
49        int task_off;
50        int pid_off;
51        int name_off;
52
53      public:
54        ProcessInfo(ThreadContext *_tc);
55
56        Addr task(Addr ksp) const;
57        int pid(Addr ksp) const;
58        std::string name(Addr ksp) const;
59    };
60
61    class StackTrace
62    {
63      protected:
64        typedef TheISA::MachInst MachInst;
65      private:
66        ThreadContext *tc;
67        std::vector<Addr> stack;
68
69      private:
70        bool isEntry(Addr addr);
71        bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
72        bool decodeSave(MachInst inst, int &reg, int &disp);
73        bool decodeStack(MachInst inst, int &disp);
74
75        void trace(ThreadContext *tc, bool is_call);
76
77      public:
78        StackTrace();
79        StackTrace(ThreadContext *tc, StaticInstPtr inst);
80        ~StackTrace();
81
82        void 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
110    inline bool
111    StackTrace::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
124#endif // __ARCH_SPARC_STACKTRACE_HH__
125