stacktrace.hh revision 4145 
1/*
2 * Copyright (c) 2006 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_X86_STACKTRACE_HH__
32#define __ARCH_X86_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36
37class ThreadContext;
38namespace X86ISA
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      private:
64        ThreadContext *tc;
65        std::vector<Addr> stack;
66
67      private:
68        bool isEntry(Addr addr);
69        bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
70        bool decodeSave(MachInst inst, int &reg, int &disp);
71        bool decodeStack(MachInst inst, int &disp);
72
73        void trace(ThreadContext *tc, bool is_call);
74
75      public:
76        StackTrace();
77        StackTrace(ThreadContext *tc, StaticInstPtr inst);
78        ~StackTrace();
79
80        void clear()
81        {
82            tc = 0;
83            stack.clear();
84        }
85
86        bool valid() const { return tc != NULL; }
87        bool trace(ThreadContext *tc, StaticInstPtr inst);
88
89      public:
90        const std::vector<Addr> &getstack() const { return stack; }
91
92        static const int user = 1;
93        static const int console = 2;
94        static const int unknown = 3;
95
96#if TRACING_ON
97      private:
98        void dump();
99
100      public:
101        void dprintf() { if (DTRACE(Stack)) dump(); }
102#else
103      public:
104        void dprintf() {}
105#endif
106    };
107
108    inline bool
109    StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
110    {
111        if (!inst->isCall() && !inst->isReturn())
112            return false;
113
114        if (valid())
115            clear();
116
117        trace(tc, !inst->isReturn());
118        return true;
119    }
120}
121
122#endif // __ARCH_X86_STACKTRACE_HH__
123