src/arch/sparc/stacktrace.hh

   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
  37 class ThreadContext;
  38 class StackTrace;
  39
  40 class ProcessInfo
  41 {
  42   private:
  43     ThreadContext *tc;
  44
  45     int thread_info_size;
  46     int task_struct_size;
  47     int task_off;
  48     int pid_off;
  49     int name_off;
  50
  51   public:
  52     ProcessInfo(ThreadContext *_tc);
  53
  54     Addr task(Addr ksp) const;
  55     int pid(Addr ksp) const;
  56     std::string name(Addr ksp) const;
  57 };
  58
  59 class StackTrace
  60 {
  61   protected:
  62     typedef TheISA::MachInst MachInst;
  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 #endif // __ARCH_ALPHA_STACKTRACE_HH__