stacktrace.cc revision 5086
15086Sgblack@eecs.umich.edu/* 25086Sgblack@eecs.umich.edu * Copyright (c) 2005 The Regents of The University of Michigan 35086Sgblack@eecs.umich.edu * All rights reserved. 45086Sgblack@eecs.umich.edu * 55086Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65086Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75086Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85086Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95086Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105086Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115086Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125086Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135086Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145086Sgblack@eecs.umich.edu * this software without specific prior written permission. 155086Sgblack@eecs.umich.edu * 165086Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175086Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185086Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195086Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205086Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215086Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225086Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235086Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245086Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255086Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265086Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275086Sgblack@eecs.umich.edu * 285086Sgblack@eecs.umich.edu * Authors: Nathan Binkert 295086Sgblack@eecs.umich.edu */ 305086Sgblack@eecs.umich.edu 315086Sgblack@eecs.umich.edu#include <string> 325086Sgblack@eecs.umich.edu 335086Sgblack@eecs.umich.edu#include "arch/x86/isa_traits.hh" 345086Sgblack@eecs.umich.edu#include "arch/x86/stacktrace.hh" 355086Sgblack@eecs.umich.edu#include "arch/x86/vtophys.hh" 365086Sgblack@eecs.umich.edu#include "base/bitfield.hh" 375086Sgblack@eecs.umich.edu#include "base/trace.hh" 385086Sgblack@eecs.umich.edu#include "cpu/base.hh" 395086Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 405086Sgblack@eecs.umich.edu#include "sim/system.hh" 415086Sgblack@eecs.umich.edu 425086Sgblack@eecs.umich.eduusing namespace std; 435086Sgblack@eecs.umich.edunamespace X86ISA 445086Sgblack@eecs.umich.edu{ 455086Sgblack@eecs.umich.edu ProcessInfo::ProcessInfo(ThreadContext *_tc) 465086Sgblack@eecs.umich.edu : tc(_tc) 475086Sgblack@eecs.umich.edu { 485086Sgblack@eecs.umich.edu Addr addr = 0; 495086Sgblack@eecs.umich.edu 505086Sgblack@eecs.umich.edu VirtualPort *vp; 515086Sgblack@eecs.umich.edu 525086Sgblack@eecs.umich.edu vp = tc->getVirtPort(); 535086Sgblack@eecs.umich.edu 545086Sgblack@eecs.umich.edu if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr)) 555086Sgblack@eecs.umich.edu panic("thread info not compiled into kernel\n"); 565086Sgblack@eecs.umich.edu thread_info_size = vp->readGtoH<int32_t>(addr); 575086Sgblack@eecs.umich.edu 585086Sgblack@eecs.umich.edu if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr)) 595086Sgblack@eecs.umich.edu panic("thread info not compiled into kernel\n"); 605086Sgblack@eecs.umich.edu task_struct_size = vp->readGtoH<int32_t>(addr); 615086Sgblack@eecs.umich.edu 625086Sgblack@eecs.umich.edu if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr)) 635086Sgblack@eecs.umich.edu panic("thread info not compiled into kernel\n"); 645086Sgblack@eecs.umich.edu task_off = vp->readGtoH<int32_t>(addr); 655086Sgblack@eecs.umich.edu 665086Sgblack@eecs.umich.edu if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr)) 675086Sgblack@eecs.umich.edu panic("thread info not compiled into kernel\n"); 685086Sgblack@eecs.umich.edu pid_off = vp->readGtoH<int32_t>(addr); 695086Sgblack@eecs.umich.edu 705086Sgblack@eecs.umich.edu if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr)) 715086Sgblack@eecs.umich.edu panic("thread info not compiled into kernel\n"); 725086Sgblack@eecs.umich.edu name_off = vp->readGtoH<int32_t>(addr); 735086Sgblack@eecs.umich.edu 745086Sgblack@eecs.umich.edu tc->delVirtPort(vp); 755086Sgblack@eecs.umich.edu } 765086Sgblack@eecs.umich.edu 775086Sgblack@eecs.umich.edu Addr 785086Sgblack@eecs.umich.edu ProcessInfo::task(Addr ksp) const 795086Sgblack@eecs.umich.edu { 805086Sgblack@eecs.umich.edu Addr base = ksp & ~0x3fff; 815086Sgblack@eecs.umich.edu if (base == ULL(0xfffffc0000000000)) 825086Sgblack@eecs.umich.edu return 0; 835086Sgblack@eecs.umich.edu 845086Sgblack@eecs.umich.edu Addr tsk; 855086Sgblack@eecs.umich.edu 865086Sgblack@eecs.umich.edu VirtualPort *vp; 875086Sgblack@eecs.umich.edu 885086Sgblack@eecs.umich.edu vp = tc->getVirtPort(); 895086Sgblack@eecs.umich.edu tsk = vp->readGtoH<Addr>(base + task_off); 905086Sgblack@eecs.umich.edu tc->delVirtPort(vp); 915086Sgblack@eecs.umich.edu 925086Sgblack@eecs.umich.edu return tsk; 935086Sgblack@eecs.umich.edu } 945086Sgblack@eecs.umich.edu 955086Sgblack@eecs.umich.edu int 965086Sgblack@eecs.umich.edu ProcessInfo::pid(Addr ksp) const 975086Sgblack@eecs.umich.edu { 985086Sgblack@eecs.umich.edu Addr task = this->task(ksp); 995086Sgblack@eecs.umich.edu if (!task) 1005086Sgblack@eecs.umich.edu return -1; 1015086Sgblack@eecs.umich.edu 1025086Sgblack@eecs.umich.edu uint16_t pd; 1035086Sgblack@eecs.umich.edu 1045086Sgblack@eecs.umich.edu VirtualPort *vp; 1055086Sgblack@eecs.umich.edu 1065086Sgblack@eecs.umich.edu vp = tc->getVirtPort(); 1075086Sgblack@eecs.umich.edu pd = vp->readGtoH<uint16_t>(task + pid_off); 1085086Sgblack@eecs.umich.edu tc->delVirtPort(vp); 1095086Sgblack@eecs.umich.edu 1105086Sgblack@eecs.umich.edu return pd; 1115086Sgblack@eecs.umich.edu } 1125086Sgblack@eecs.umich.edu 1135086Sgblack@eecs.umich.edu string 1145086Sgblack@eecs.umich.edu ProcessInfo::name(Addr ksp) const 1155086Sgblack@eecs.umich.edu { 1165086Sgblack@eecs.umich.edu Addr task = this->task(ksp); 1175086Sgblack@eecs.umich.edu if (!task) 1185086Sgblack@eecs.umich.edu return "console"; 1195086Sgblack@eecs.umich.edu 1205086Sgblack@eecs.umich.edu char comm[256]; 1215086Sgblack@eecs.umich.edu CopyStringOut(tc, comm, task + name_off, sizeof(comm)); 1225086Sgblack@eecs.umich.edu if (!comm[0]) 1235086Sgblack@eecs.umich.edu return "startup"; 1245086Sgblack@eecs.umich.edu 1255086Sgblack@eecs.umich.edu return comm; 1265086Sgblack@eecs.umich.edu } 1275086Sgblack@eecs.umich.edu 1285086Sgblack@eecs.umich.edu StackTrace::StackTrace() 1295086Sgblack@eecs.umich.edu : tc(0), stack(64) 1305086Sgblack@eecs.umich.edu { 1315086Sgblack@eecs.umich.edu } 1325086Sgblack@eecs.umich.edu 1335086Sgblack@eecs.umich.edu StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst) 1345086Sgblack@eecs.umich.edu : tc(0), stack(64) 1355086Sgblack@eecs.umich.edu { 1365086Sgblack@eecs.umich.edu trace(_tc, inst); 1375086Sgblack@eecs.umich.edu } 1385086Sgblack@eecs.umich.edu 1395086Sgblack@eecs.umich.edu StackTrace::~StackTrace() 1405086Sgblack@eecs.umich.edu { 1415086Sgblack@eecs.umich.edu } 1425086Sgblack@eecs.umich.edu 1435086Sgblack@eecs.umich.edu void 1445086Sgblack@eecs.umich.edu StackTrace::trace(ThreadContext *_tc, bool is_call) 1455086Sgblack@eecs.umich.edu { 1465086Sgblack@eecs.umich.edu } 1475086Sgblack@eecs.umich.edu 1485086Sgblack@eecs.umich.edu bool 1495086Sgblack@eecs.umich.edu StackTrace::isEntry(Addr addr) 1505086Sgblack@eecs.umich.edu { 1515086Sgblack@eecs.umich.edu return false; 1525086Sgblack@eecs.umich.edu } 1535086Sgblack@eecs.umich.edu 1545086Sgblack@eecs.umich.edu bool 1555086Sgblack@eecs.umich.edu StackTrace::decodeStack(MachInst inst, int &disp) 1565086Sgblack@eecs.umich.edu { 1575086Sgblack@eecs.umich.edu return true; 1585086Sgblack@eecs.umich.edu } 1595086Sgblack@eecs.umich.edu 1605086Sgblack@eecs.umich.edu bool 1615086Sgblack@eecs.umich.edu StackTrace::decodeSave(MachInst inst, int ®, int &disp) 1625086Sgblack@eecs.umich.edu { 1635086Sgblack@eecs.umich.edu return true; 1645086Sgblack@eecs.umich.edu } 1655086Sgblack@eecs.umich.edu 1665086Sgblack@eecs.umich.edu /* 1675086Sgblack@eecs.umich.edu * Decode the function prologue for the function we're in, and note 1685086Sgblack@eecs.umich.edu * which registers are stored where, and how large the stack frame is. 1695086Sgblack@eecs.umich.edu */ 1705086Sgblack@eecs.umich.edu bool 1715086Sgblack@eecs.umich.edu StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func, 1725086Sgblack@eecs.umich.edu int &size, Addr &ra) 1735086Sgblack@eecs.umich.edu { 1745086Sgblack@eecs.umich.edu size = 0; 1755086Sgblack@eecs.umich.edu ra = 0; 1765086Sgblack@eecs.umich.edu 1775086Sgblack@eecs.umich.edu for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) { 1785086Sgblack@eecs.umich.edu MachInst inst; 1795086Sgblack@eecs.umich.edu CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst)); 1805086Sgblack@eecs.umich.edu 1815086Sgblack@eecs.umich.edu int reg, disp; 1825086Sgblack@eecs.umich.edu if (decodeStack(inst, disp)) { 1835086Sgblack@eecs.umich.edu if (size) { 1845086Sgblack@eecs.umich.edu // panic("decoding frame size again"); 1855086Sgblack@eecs.umich.edu return true; 1865086Sgblack@eecs.umich.edu } 1875086Sgblack@eecs.umich.edu size += disp; 1885086Sgblack@eecs.umich.edu } else if (decodeSave(inst, reg, disp)) { 1895086Sgblack@eecs.umich.edu if (!ra && reg == ReturnAddressReg) { 1905086Sgblack@eecs.umich.edu CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr)); 1915086Sgblack@eecs.umich.edu if (!ra) { 1925086Sgblack@eecs.umich.edu // panic("no return address value pc=%#x\n", pc); 1935086Sgblack@eecs.umich.edu return false; 1945086Sgblack@eecs.umich.edu } 1955086Sgblack@eecs.umich.edu } 1965086Sgblack@eecs.umich.edu } 1975086Sgblack@eecs.umich.edu } 1985086Sgblack@eecs.umich.edu 1995086Sgblack@eecs.umich.edu return true; 2005086Sgblack@eecs.umich.edu } 2015086Sgblack@eecs.umich.edu 2025086Sgblack@eecs.umich.edu#if TRACING_ON 2035086Sgblack@eecs.umich.edu void 2045086Sgblack@eecs.umich.edu StackTrace::dump() 2055086Sgblack@eecs.umich.edu { 2065086Sgblack@eecs.umich.edu StringWrap name(tc->getCpuPtr()->name()); 2075086Sgblack@eecs.umich.edu SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; 2085086Sgblack@eecs.umich.edu 2095086Sgblack@eecs.umich.edu DPRINTFN("------ Stack ------\n"); 2105086Sgblack@eecs.umich.edu 2115086Sgblack@eecs.umich.edu string symbol; 2125086Sgblack@eecs.umich.edu for (int i = 0, size = stack.size(); i < size; ++i) { 2135086Sgblack@eecs.umich.edu Addr addr = stack[size - i - 1]; 2145086Sgblack@eecs.umich.edu if (addr == user) 2155086Sgblack@eecs.umich.edu symbol = "user"; 2165086Sgblack@eecs.umich.edu else if (addr == console) 2175086Sgblack@eecs.umich.edu symbol = "console"; 2185086Sgblack@eecs.umich.edu else if (addr == unknown) 2195086Sgblack@eecs.umich.edu symbol = "unknown"; 2205086Sgblack@eecs.umich.edu else 2215086Sgblack@eecs.umich.edu symtab->findSymbol(addr, symbol); 2225086Sgblack@eecs.umich.edu 2235086Sgblack@eecs.umich.edu DPRINTFN("%#x: %s\n", addr, symbol); 2245086Sgblack@eecs.umich.edu } 2255086Sgblack@eecs.umich.edu } 2265086Sgblack@eecs.umich.edu#endif 2275086Sgblack@eecs.umich.edu} 228