src/arch/arm/stacktrace.hh

   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 "config/the_isa.hh"
  38 #include "cpu/static_inst.hh"
  39
  40 class ThreadContext;
  41 class StackTrace;
  42
  43 namespace ArmISA
  44 {
  45
  46 class ProcessInfo
  47 {
  48   private:
  49     ThreadContext *tc;
  50
  51     int thread_info_size;
  52     int task_struct_size;
  53     int task_off;
  54     int pid_off;
  55     int name_off;
  56
  57   public:
  58     ProcessInfo(ThreadContext *_tc);
  59
  60     Addr task(Addr ksp) const;
  61     int pid(Addr ksp) const;
  62     std::string name(Addr ksp) const;
  63 };
  64
  65 class StackTrace
  66 {
  67   protected:
  68     typedef TheISA::MachInst MachInst;
  69   private:
  70     ThreadContext *tc;
  71     std::vector<Addr> stack;
  72
  73   private:
  74     bool isEntry(Addr addr);
  75     bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
  76     bool decodeSave(MachInst inst, int &reg, int &disp);
  77     bool decodeStack(MachInst inst, int &disp);
  78
  79     void trace(ThreadContext *tc, bool is_call);
  80
  81   public:
  82     StackTrace();
  83     StackTrace(ThreadContext *tc, StaticInstPtr inst);
  84     ~StackTrace();
  85
  86     void clear()
  87     {
  88         tc = 0;
  89         stack.clear();
  90     }
  91
  92     bool valid() const { return tc != NULL; }
  93     bool trace(ThreadContext *tc, StaticInstPtr inst);
  94
  95   public:
  96     const std::vector<Addr> &getstack() const { return stack; }
  97
  98     static const int user = 1;
  99     static const int console = 2;
 100     static const int unknown = 3;
 101
 102 #if TRACING_ON
 103   private:
 104     void dump();
 105
 106   public:
 107     void dprintf() { if (DTRACE(Stack)) dump(); }
 108 #else
 109   public:
 110     void dprintf() {}
 111 #endif
 112 };
 113
 114 inline bool
 115 StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
 116 {
 117     if (!inst->isCall() && !inst->isReturn())
 118         return false;
 119
 120     if (valid())
 121         clear();
 122
 123     trace(tc, !inst->isReturn());
 124     return true;
 125 }
 126
 127 }
 128
 129 #endif // __ARCH_ARM_STACKTRACE_HH__