util/statetrace/Makefile: Makefile to build statetrace. Targets are: statetrace: alias to build using the "native" compiler statetrace-native: use the native compiler statetrace-sparc: use the sparc cross compiler I'll make this a little more fancy and capable later. util/statetrace/arch/tracechild_i386.cc: Implementation of i386 support util/statetrace/arch/tracechild_i386.hh: Declaration of i386 support util/statetrace/arch/tracechild_sparc.cc: implementation of SPARC support util/statetrace/arch/tracechild_sparc.hh: declaration of SPARC support util/statetrace/printer.cc: Implementation of the "Printer" objects which parse and output the state of the process after each instruction. There are currently two types of printers, nested ones and register ones. These are called NestingPrinter and RegPrinter respectively. util/statetrace/printer.hh: Declaration of "Printer" objects util/statetrace/refcnt.hh: This is copied from m5. I should use the one already in the tree, but I'll do that later. util/statetrace/regstate.hh: Interface for accessing registers. util/statetrace/statetrace.cc: Main file with argument parsing and the "main" function which contains the tracing loop. util/statetrace/tracechild.cc: Implementation of the base tracechild class. util/statetrace/tracechild.hh: Declaration of the base tracechild class. util/statetrace/tracechild_arch.cc: This file hooks in support for the appropriate architecture. Just the implementation is brought in, since the main program should ideally not have to know anything at all about an architecture other than it's interface. util/statetrace/x86.format: An example output template for x86. A few example SPARC templates will be added later. --HG-- extra : convert_revision : 7c8bf8230907aba42ed1e707b9ca2d6da0d4e6d4
342 lines
13 KiB
C++
342 lines
13 KiB
C++
/*
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* Copyright (c) 2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include <iostream>
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#include <errno.h>
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#include <sys/ptrace.h>
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#include <stdint.h>
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#include "tracechild_sparc.hh"
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using namespace std;
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string SparcTraceChild::regNames[numregs] = {
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//Global registers
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"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
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//Output registers
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"o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
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//Local registers
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
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//Input registers
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"i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7",
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//Floating point
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
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//Miscelaneous
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"fsr", "fprs", "pc", "npc", "y", "cwp", "pstate", "asi", "ccr"};
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int64_t getRegs(regs & myregs, fpu & myfpu,
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int64_t * locals, int64_t * inputs, int num)
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{
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assert(num < SparcTraceChild::numregs && num >= 0);
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switch(num)
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{
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//Global registers
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case SparcTraceChild::G0: return 0;
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case SparcTraceChild::G1: return myregs.r_g1;
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case SparcTraceChild::G2: return myregs.r_g2;
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case SparcTraceChild::G3: return myregs.r_g3;
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case SparcTraceChild::G4: return myregs.r_g4;
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case SparcTraceChild::G5: return myregs.r_g5;
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case SparcTraceChild::G6: return myregs.r_g6;
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case SparcTraceChild::G7: return myregs.r_g7;
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//Output registers
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case SparcTraceChild::O0: return myregs.r_o0;
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case SparcTraceChild::O1: return myregs.r_o1;
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case SparcTraceChild::O2: return myregs.r_o2;
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case SparcTraceChild::O3: return myregs.r_o3;
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case SparcTraceChild::O4: return myregs.r_o4;
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case SparcTraceChild::O5: return myregs.r_o5;
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case SparcTraceChild::O6: return myregs.r_o6;
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case SparcTraceChild::O7: return myregs.r_o7;
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//Local registers
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case SparcTraceChild::L0: return locals[0];
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case SparcTraceChild::L1: return locals[1];
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case SparcTraceChild::L2: return locals[2];
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case SparcTraceChild::L3: return locals[3];
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case SparcTraceChild::L4: return locals[4];
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case SparcTraceChild::L5: return locals[5];
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case SparcTraceChild::L6: return locals[6];
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case SparcTraceChild::L7: return locals[7];
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//Input registers
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case SparcTraceChild::I0: return inputs[0];
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case SparcTraceChild::I1: return inputs[1];
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case SparcTraceChild::I2: return inputs[2];
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case SparcTraceChild::I3: return inputs[3];
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case SparcTraceChild::I4: return inputs[4];
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case SparcTraceChild::I5: return inputs[5];
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case SparcTraceChild::I6: return inputs[6];
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case SparcTraceChild::I7: return inputs[7];
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//Floating point
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case SparcTraceChild::F0: return myfpu.f_fpstatus.fpu_fr[0];
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case SparcTraceChild::F1: return myfpu.f_fpstatus.fpu_fr[1];
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case SparcTraceChild::F2: return myfpu.f_fpstatus.fpu_fr[2];
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case SparcTraceChild::F3: return myfpu.f_fpstatus.fpu_fr[3];
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case SparcTraceChild::F4: return myfpu.f_fpstatus.fpu_fr[4];
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case SparcTraceChild::F5: return myfpu.f_fpstatus.fpu_fr[5];
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case SparcTraceChild::F6: return myfpu.f_fpstatus.fpu_fr[6];
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case SparcTraceChild::F7: return myfpu.f_fpstatus.fpu_fr[7];
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case SparcTraceChild::F8: return myfpu.f_fpstatus.fpu_fr[8];
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case SparcTraceChild::F9: return myfpu.f_fpstatus.fpu_fr[9];
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case SparcTraceChild::F10: return myfpu.f_fpstatus.fpu_fr[10];
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case SparcTraceChild::F11: return myfpu.f_fpstatus.fpu_fr[11];
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case SparcTraceChild::F12: return myfpu.f_fpstatus.fpu_fr[12];
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case SparcTraceChild::F13: return myfpu.f_fpstatus.fpu_fr[13];
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case SparcTraceChild::F14: return myfpu.f_fpstatus.fpu_fr[14];
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case SparcTraceChild::F15: return myfpu.f_fpstatus.fpu_fr[15];
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case SparcTraceChild::F16: return myfpu.f_fpstatus.fpu_fr[16];
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case SparcTraceChild::F17: return myfpu.f_fpstatus.fpu_fr[17];
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case SparcTraceChild::F18: return myfpu.f_fpstatus.fpu_fr[18];
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case SparcTraceChild::F19: return myfpu.f_fpstatus.fpu_fr[19];
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case SparcTraceChild::F20: return myfpu.f_fpstatus.fpu_fr[20];
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case SparcTraceChild::F21: return myfpu.f_fpstatus.fpu_fr[21];
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case SparcTraceChild::F22: return myfpu.f_fpstatus.fpu_fr[22];
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case SparcTraceChild::F23: return myfpu.f_fpstatus.fpu_fr[23];
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case SparcTraceChild::F24: return myfpu.f_fpstatus.fpu_fr[24];
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case SparcTraceChild::F25: return myfpu.f_fpstatus.fpu_fr[25];
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case SparcTraceChild::F26: return myfpu.f_fpstatus.fpu_fr[26];
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case SparcTraceChild::F27: return myfpu.f_fpstatus.fpu_fr[27];
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case SparcTraceChild::F28: return myfpu.f_fpstatus.fpu_fr[28];
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case SparcTraceChild::F29: return myfpu.f_fpstatus.fpu_fr[29];
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case SparcTraceChild::F30: return myfpu.f_fpstatus.fpu_fr[30];
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case SparcTraceChild::F31: return myfpu.f_fpstatus.fpu_fr[31];
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//Miscelaneous
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case SparcTraceChild::FSR: return myfpu.f_fpstatus.Fpu_fsr;
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case SparcTraceChild::FPRS: return myregs.r_fprs;
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case SparcTraceChild::PC: return myregs.r_tpc;
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case SparcTraceChild::NPC: return myregs.r_tnpc;
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case SparcTraceChild::Y: return myregs.r_y;
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case SparcTraceChild::CWP:
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return (myregs.r_tstate >> 0) & ((1 << 5) - 1);
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case SparcTraceChild::PSTATE:
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return (myregs.r_tstate >> 8) & ((1 << 13) - 1);
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case SparcTraceChild::ASI:
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return (myregs.r_tstate >> 24) & ((1 << 8) - 1);
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case SparcTraceChild::CCR:
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return (myregs.r_tstate >> 32) & ((1 << 8) - 1);
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default:
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assert(0);
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return 0;
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}
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}
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bool SparcTraceChild::update(int pid)
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{
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static const int stackBias = 2047;
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memcpy(&oldregs, &theregs, sizeof(regs));
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memcpy(&oldfpregs, &thefpregs, sizeof(fpu));
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memcpy(oldLocals, locals, 8 * sizeof(uint64_t));
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memcpy(oldInputs, inputs, 8 * sizeof(uint64_t));
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if(ptrace(PTRACE_GETREGS, pid, &theregs, 0) != 0)
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{
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cerr << "Update failed" << endl;
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return false;
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}
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uint64_t StackPointer = getRegVal(O6);
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for(unsigned int x = 0; x < 8; x++)
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{
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locals[x] = ptrace(PTRACE_PEEKTEXT, pid,
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StackPointer + stackBias + x * 8, 0);
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inputs[x] = ptrace(PTRACE_PEEKTEXT, pid,
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StackPointer + stackBias + x * 8 + (8 * 8), 0);
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}
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if(ptrace(PTRACE_GETFPREGS, pid, &thefpregs, 0) != 0)
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return false;
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for(unsigned int x = 0; x < numregs; x++)
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regDiffSinceUpdate[x] = (getRegVal(x) != getOldRegVal(x));
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return true;
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}
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SparcTraceChild::SparcTraceChild()
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{
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for(unsigned int x = 0; x < numregs; x++)
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regDiffSinceUpdate[x] = false;
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}
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bool SparcTraceChild::step()
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{
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//Two important considerations are that the address of the instruction
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//being breakpointed should be word (64bit) aligned, and that both the
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//next instruction and the instruction after that need to be breakpointed
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//so that annulled branches will still stop as well.
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const static uint64_t breakInst = 0x91d02001;
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const static uint64_t breakWord = breakInst | (breakInst << 32);
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const static uint64_t lowMask = (uint64_t)(0xFFFFFFFF);
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const static uint64_t highMask = lowMask << 32;
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uint64_t originalInst, originalAnnulInst;
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uint64_t nextPC = getRegVal(NPC);
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bool unaligned = nextPC & 7;
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uint64_t alignedPC = nextPC & (~7);
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originalInst = ptrace(PTRACE_PEEKTEXT, pid, alignedPC, 0);
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if(unaligned)
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{
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originalAnnulInst = ptrace(PTRACE_PEEKTEXT, pid, alignedPC+8, 0);
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}
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uint64_t newInst;
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if(unaligned)
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{
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newInst = (originalInst & highMask) | (breakInst << 0);
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if(ptrace(PTRACE_POKETEXT, pid, alignedPC, newInst) != 0)
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cerr << "Poke failed" << endl;
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newInst = (originalAnnulInst & lowMask) | (breakInst << 32);
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if(ptrace(PTRACE_POKETEXT, pid, alignedPC+8, newInst) != 0)
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cerr << "Poke failed" << endl;
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}
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else
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{
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if(ptrace(PTRACE_POKETEXT, pid, alignedPC, breakWord) != 0)
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cerr << "Poke failed" << endl;
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}
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//Note that the "addr" parameter is supposed to be ignored, but in at
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//least one version of the kernel, it must be 1 or it will set what
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//pc to continue from
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if(ptrace(PTRACE_CONT, pid, /*nextPC - 4*/ 1, 0) != 0)
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cerr << "Cont failed" << endl;
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doWait();
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update(pid);
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if(ptrace(PTRACE_POKETEXT, pid, alignedPC, originalInst) != 0)
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cerr << "Repoke failed" << endl;
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if(unaligned)
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{
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if(ptrace(PTRACE_POKETEXT, pid, alignedPC+8, originalAnnulInst) != 0)
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cerr << "Repoke failed" << endl;
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}
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return true;
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}
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int64_t SparcTraceChild::getRegVal(int num)
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{
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return getRegs(theregs, thefpregs, locals, inputs, num);
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}
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int64_t SparcTraceChild::getOldRegVal(int num)
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{
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return getRegs(oldregs, oldfpregs, oldLocals, oldInputs, num);
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}
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char * SparcTraceChild::printReg(int num)
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{
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sprintf(printBuffer, "0x%016llx", getRegVal(num));
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return printBuffer;
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}
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ostream & SparcTraceChild::outputStartState(ostream & os)
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{
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uint64_t sp = getSP();
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uint64_t pc = getPC();
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char obuf[1024];
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sprintf(obuf, "Initial stack pointer = 0x%016llx\n", sp);
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os << obuf;
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sprintf(obuf, "Initial program counter = 0x%016llx\n", pc);
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os << obuf;
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//Take out the stack bias
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sp += 2047;
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//Output the window save area
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for(unsigned int x = 0; x < 16; x++)
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{
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uint64_t regspot = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sprintf(obuf, "0x%016llx: Window save %d = 0x%016llx\n",
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sp, x+1, regspot);
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os << obuf;
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sp += 8;
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}
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//Output the argument count
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uint64_t cargc = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sprintf(obuf, "0x%016llx: Argc = 0x%016llx\n", sp, cargc);
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os << obuf;
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sp += 8;
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//Output argv pointers
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int argCount = 0;
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uint64_t cargv;
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do
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{
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cargv = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sprintf(obuf, "0x%016llx: argv[%d] = 0x%016llx\n",
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sp, argCount++, cargv);
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os << obuf;
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sp += 8;
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} while(cargv);
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//Output the envp pointers
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int envCount = 0;
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uint64_t cenvp;
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do
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{
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cenvp = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sprintf(obuf, "0x%016llx: envp[%d] = 0x%016llx\n",
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sp, envCount++, cenvp);
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os << obuf;
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sp += 8;
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} while(cenvp);
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uint64_t auxType, auxVal;
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do
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{
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auxType = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sp += 8;
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auxVal = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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sp += 8;
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sprintf(obuf, "0x%016llx: Auxiliary vector = {0x%016llx, 0x%016llx}\n",
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sp - 16, auxType, auxVal);
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os << obuf;
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} while(auxType != 0 || auxVal != 0);
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//Print out the argument strings, environment strings, and file name.
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string current;
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uint64_t buf;
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uint64_t currentStart = sp;
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bool clearedInitialPadding = false;
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do
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{
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buf = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
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char * cbuf = (char *)&buf;
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for(int x = 0; x < sizeof(uint64_t); x++)
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{
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if(cbuf[x])
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current += cbuf[x];
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else
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{
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sprintf(obuf, "0x%016llx: \"%s\"\n",
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currentStart, current.c_str());
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os << obuf;
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current = "";
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currentStart = sp + x + 1;
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}
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}
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sp += 8;
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clearedInitialPadding = clearedInitialPadding || buf != 0;
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} while(!clearedInitialPadding || buf != 0);
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return os;
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}
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TraceChild * genTraceChild()
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{
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return new SparcTraceChild;
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}
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