src/arch/arm/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
  29 #ifndef __ARCH_ARM_STACKTRACE_HH__
  30 #define __ARCH_ARM_STACKTRACE_HH__
  31
  32 #include "base/trace.hh"
  33 #include "cpu/static_inst.hh"
  34 #include "debug/Stack.hh"
  35
  36 class ThreadContext;
  37 namespace ArmISA
  38 {
  39
  40 class StackTrace
  41 {
  42   protected:
  43     typedef ArmISA::MachInst MachInst;
  44   private:
  45     ThreadContext *tc;
  46     std::vector<Addr> stack;
  47
  48   private:
  49     bool isEntry(Addr addr);
  50     bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
  51     bool decodeSave(MachInst inst, int &reg, int &disp);
  52     bool decodeStack(MachInst inst, int &disp);
  53
  54     void trace(ThreadContext *tc, bool is_call);
  55
  56   public:
  57     StackTrace();
  58     StackTrace(ThreadContext *tc, const StaticInstPtr &inst);
  59     ~StackTrace();
  60
  61     void clear()
  62     {
  63         tc = 0;
  64         stack.clear();
  65     }
  66
  67     bool valid() const { return tc != NULL; }
  68     bool trace(ThreadContext *tc, const StaticInstPtr &inst);
  69
  70   public:
  71     const std::vector<Addr> &getstack() const { return stack; }
  72
  73 #if TRACING_ON
  74   private:
  75     void dump();
  76
  77   public:
  78     void dprintf() { if (DTRACE(Stack)) dump(); }
  79 #else
  80   public:
  81     void dprintf() {}
  82 #endif
  83 };
  84
  85 inline bool
  86 StackTrace::trace(ThreadContext *tc, const StaticInstPtr &inst)
  87 {
  88     if (!inst->isCall() && !inst->isReturn())
  89         return false;
  90
  91     if (valid())
  92         clear();
  93
  94     trace(tc, !inst->isReturn());
  95     return true;
  96 }
  97
  98 } // Namespace ArmISA
  99
 100 #endif // __ARCH_ARM_STACKTRACE_HH__