stacktrace.cc revision 8852
11917SN/A/* 21917SN/A * Copyright (c) 2005 The Regents of The University of Michigan 31917SN/A * All rights reserved. 41917SN/A * 51917SN/A * Redistribution and use in source and binary forms, with or without 61917SN/A * modification, are permitted provided that the following conditions are 71917SN/A * met: redistributions of source code must retain the above copyright 81917SN/A * notice, this list of conditions and the following disclaimer; 91917SN/A * redistributions in binary form must reproduce the above copyright 101917SN/A * notice, this list of conditions and the following disclaimer in the 111917SN/A * documentation and/or other materials provided with the distribution; 121917SN/A * neither the name of the copyright holders nor the names of its 131917SN/A * contributors may be used to endorse or promote products derived from 141917SN/A * this software without specific prior written permission. 151917SN/A * 161917SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 171917SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 181917SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 191917SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 201917SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 211917SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 221917SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 231917SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 241917SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 251917SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 261917SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 291917SN/A */ 301917SN/A 311917SN/A#include <string> 321917SN/A 331917SN/A#include "arch/alpha/isa_traits.hh" 341917SN/A#include "arch/alpha/stacktrace.hh" 351917SN/A#include "arch/alpha/vtophys.hh" 361917SN/A#include "base/bitfield.hh" 371917SN/A#include "base/trace.hh" 381917SN/A#include "cpu/base.hh" 392680Sktlim@umich.edu#include "cpu/thread_context.hh" 408706Sandreas.hansson@arm.com#include "mem/fs_translating_port_proxy.hh" 412235SN/A#include "sim/system.hh" 421917SN/A 431917SN/Ausing namespace std; 441917SN/A 455569Snate@binkert.orgnamespace AlphaISA { 465569Snate@binkert.org 475569Snate@binkert.orgProcessInfo::ProcessInfo(ThreadContext *_tc) 485569Snate@binkert.org : tc(_tc) 491917SN/A{ 505569Snate@binkert.org Addr addr = 0; 518852Sandreas.hansson@arm.com FSTranslatingPortProxy &vp = tc->getVirtProxy(); 525569Snate@binkert.org SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; 531917SN/A 545569Snate@binkert.org if (!symtab->findAddress("thread_info_size", addr)) 555569Snate@binkert.org panic("thread info not compiled into kernel\n"); 568852Sandreas.hansson@arm.com thread_info_size = vp.readGtoH<int32_t>(addr); 572684Ssaidi@eecs.umich.edu 585569Snate@binkert.org if (!symtab->findAddress("task_struct_size", addr)) 595569Snate@binkert.org panic("thread info not compiled into kernel\n"); 608852Sandreas.hansson@arm.com task_struct_size = vp.readGtoH<int32_t>(addr); 612684Ssaidi@eecs.umich.edu 625569Snate@binkert.org if (!symtab->findAddress("thread_info_task", addr)) 635569Snate@binkert.org panic("thread info not compiled into kernel\n"); 648852Sandreas.hansson@arm.com task_off = vp.readGtoH<int32_t>(addr); 651917SN/A 665569Snate@binkert.org if (!symtab->findAddress("task_struct_pid", addr)) 675569Snate@binkert.org panic("thread info not compiled into kernel\n"); 688852Sandreas.hansson@arm.com pid_off = vp.readGtoH<int32_t>(addr); 691917SN/A 705569Snate@binkert.org if (!symtab->findAddress("task_struct_comm", addr)) 715569Snate@binkert.org panic("thread info not compiled into kernel\n"); 728852Sandreas.hansson@arm.com name_off = vp.readGtoH<int32_t>(addr); 735569Snate@binkert.org} 741917SN/A 755569Snate@binkert.orgAddr 765569Snate@binkert.orgProcessInfo::task(Addr ksp) const 775569Snate@binkert.org{ 785569Snate@binkert.org Addr base = ksp & ~0x3fff; 795569Snate@binkert.org if (base == ULL(0xfffffc0000000000)) 805569Snate@binkert.org return 0; 811917SN/A 825569Snate@binkert.org Addr tsk; 835569Snate@binkert.org 848852Sandreas.hansson@arm.com FSTranslatingPortProxy &vp = tc->getVirtProxy(); 858852Sandreas.hansson@arm.com tsk = vp.readGtoH<Addr>(base + task_off); 865569Snate@binkert.org 875569Snate@binkert.org return tsk; 885569Snate@binkert.org} 895569Snate@binkert.org 905569Snate@binkert.orgint 915569Snate@binkert.orgProcessInfo::pid(Addr ksp) const 925569Snate@binkert.org{ 935569Snate@binkert.org Addr task = this->task(ksp); 945569Snate@binkert.org if (!task) 955569Snate@binkert.org return -1; 965569Snate@binkert.org 975569Snate@binkert.org uint16_t pd; 985569Snate@binkert.org 998852Sandreas.hansson@arm.com FSTranslatingPortProxy &vp = tc->getVirtProxy(); 1008852Sandreas.hansson@arm.com pd = vp.readGtoH<uint16_t>(task + pid_off); 1015569Snate@binkert.org 1025569Snate@binkert.org return pd; 1035569Snate@binkert.org} 1045569Snate@binkert.org 1055569Snate@binkert.orgstring 1065569Snate@binkert.orgProcessInfo::name(Addr ksp) const 1075569Snate@binkert.org{ 1085569Snate@binkert.org Addr task = this->task(ksp); 1095569Snate@binkert.org if (!task) 1105569Snate@binkert.org return "console"; 1115569Snate@binkert.org 1125569Snate@binkert.org char comm[256]; 1135569Snate@binkert.org CopyStringOut(tc, comm, task + name_off, sizeof(comm)); 1145569Snate@binkert.org if (!comm[0]) 1155569Snate@binkert.org return "startup"; 1165569Snate@binkert.org 1175569Snate@binkert.org return comm; 1185569Snate@binkert.org} 1195569Snate@binkert.org 1205569Snate@binkert.orgStackTrace::StackTrace() 1215569Snate@binkert.org : tc(0), stack(64) 1225569Snate@binkert.org{ 1235569Snate@binkert.org} 1245569Snate@binkert.org 1255569Snate@binkert.orgStackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst) 1265569Snate@binkert.org : tc(0), stack(64) 1275569Snate@binkert.org{ 1285569Snate@binkert.org trace(_tc, inst); 1295569Snate@binkert.org} 1305569Snate@binkert.org 1315569Snate@binkert.orgStackTrace::~StackTrace() 1325569Snate@binkert.org{ 1335569Snate@binkert.org} 1345569Snate@binkert.org 1355569Snate@binkert.orgvoid 1365569Snate@binkert.orgStackTrace::trace(ThreadContext *_tc, bool is_call) 1375569Snate@binkert.org{ 1385569Snate@binkert.org tc = _tc; 1395569Snate@binkert.org 1405569Snate@binkert.org System *sys = tc->getSystemPtr(); 1415569Snate@binkert.org 1425569Snate@binkert.org bool usermode = 1435569Snate@binkert.org (tc->readMiscRegNoEffect(IPR_DTB_CM) & 0x18) != 0; 1445569Snate@binkert.org 1457720Sgblack@eecs.umich.edu Addr pc = tc->pcState().pc(); 1465569Snate@binkert.org bool kernel = sys->kernelStart <= pc && pc <= sys->kernelEnd; 1475569Snate@binkert.org 1485569Snate@binkert.org if (usermode) { 1495569Snate@binkert.org stack.push_back(user); 1505569Snate@binkert.org return; 1511917SN/A } 1521917SN/A 1535569Snate@binkert.org if (!kernel) { 1545569Snate@binkert.org stack.push_back(console); 1555569Snate@binkert.org return; 1561917SN/A } 1571917SN/A 1585569Snate@binkert.org SymbolTable *symtab = sys->kernelSymtab; 1595569Snate@binkert.org Addr ksp = tc->readIntReg(StackPointerReg); 1605569Snate@binkert.org Addr bottom = ksp & ~0x3fff; 1611917SN/A 1625569Snate@binkert.org if (is_call) { 1635569Snate@binkert.org Addr addr; 1645569Snate@binkert.org if (!symtab->findNearestAddr(pc, addr)) 1655569Snate@binkert.org panic("could not find address %#x", pc); 1661917SN/A 1675569Snate@binkert.org stack.push_back(addr); 1687720Sgblack@eecs.umich.edu pc = tc->pcState().pc(); 1691917SN/A } 1701917SN/A 1715569Snate@binkert.org while (ksp > bottom) { 1725569Snate@binkert.org Addr addr; 1735569Snate@binkert.org if (!symtab->findNearestAddr(pc, addr)) 1745569Snate@binkert.org panic("could not find symbol for pc=%#x", pc); 1755569Snate@binkert.org assert(pc >= addr && "symbol botch: callpc < func"); 1761917SN/A 1775569Snate@binkert.org stack.push_back(addr); 1781917SN/A 1795569Snate@binkert.org if (isEntry(addr)) 1801917SN/A return; 1813570Sgblack@eecs.umich.edu 1823570Sgblack@eecs.umich.edu Addr ra; 1833570Sgblack@eecs.umich.edu int size; 1845569Snate@binkert.org if (decodePrologue(ksp, pc, addr, size, ra)) { 1855569Snate@binkert.org if (!ra) 1861917SN/A return; 1871917SN/A 1885569Snate@binkert.org if (size <= 0) { 1891977SN/A stack.push_back(unknown); 1901977SN/A return; 1911977SN/A } 1921977SN/A 1935569Snate@binkert.org pc = ra; 1945569Snate@binkert.org ksp += size; 1955569Snate@binkert.org } else { 1965569Snate@binkert.org stack.push_back(unknown); 1975569Snate@binkert.org return; 1981917SN/A } 1991917SN/A 2005569Snate@binkert.org bool kernel = sys->kernelStart <= pc && pc <= sys->kernelEnd; 2015569Snate@binkert.org if (!kernel) 2025569Snate@binkert.org return; 2035569Snate@binkert.org 2045569Snate@binkert.org if (stack.size() >= 1000) 2055569Snate@binkert.org panic("unwinding too far"); 2061917SN/A } 2071917SN/A 2085569Snate@binkert.org panic("unwinding too far"); 2095569Snate@binkert.org} 2101917SN/A 2115569Snate@binkert.orgbool 2125569Snate@binkert.orgStackTrace::isEntry(Addr addr) 2135569Snate@binkert.org{ 2145569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp12)) 2155569Snate@binkert.org return true; 2161917SN/A 2175569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp7)) 2185569Snate@binkert.org return true; 2191917SN/A 2205569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp11)) 2215569Snate@binkert.org return true; 2221917SN/A 2235569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp21)) 2245569Snate@binkert.org return true; 2251917SN/A 2265569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp9)) 2275569Snate@binkert.org return true; 2281917SN/A 2295569Snate@binkert.org if (addr == tc->readMiscRegNoEffect(IPR_PALtemp2)) 2305569Snate@binkert.org return true; 2315569Snate@binkert.org 2325569Snate@binkert.org return false; 2335569Snate@binkert.org} 2345569Snate@binkert.org 2355569Snate@binkert.orgbool 2365569Snate@binkert.orgStackTrace::decodeStack(MachInst inst, int &disp) 2375569Snate@binkert.org{ 2385569Snate@binkert.org // lda $sp, -disp($sp) 2395569Snate@binkert.org // 2405569Snate@binkert.org // Opcode<31:26> == 0x08 2415569Snate@binkert.org // RA<25:21> == 30 2425569Snate@binkert.org // RB<20:16> == 30 2435569Snate@binkert.org // Disp<15:0> 2445569Snate@binkert.org const MachInst mem_mask = 0xffff0000; 2455569Snate@binkert.org const MachInst lda_pattern = 0x23de0000; 2465569Snate@binkert.org const MachInst lda_disp_mask = 0x0000ffff; 2475569Snate@binkert.org 2485569Snate@binkert.org // subq $sp, disp, $sp 2495569Snate@binkert.org // addq $sp, disp, $sp 2505569Snate@binkert.org // 2515569Snate@binkert.org // Opcode<31:26> == 0x10 2525569Snate@binkert.org // RA<25:21> == 30 2535569Snate@binkert.org // Lit<20:13> 2545569Snate@binkert.org // One<12> = 1 2555569Snate@binkert.org // Func<11:5> == 0x20 (addq) 2565569Snate@binkert.org // Func<11:5> == 0x29 (subq) 2575569Snate@binkert.org // RC<4:0> == 30 2585569Snate@binkert.org const MachInst intop_mask = 0xffe01fff; 2595569Snate@binkert.org const MachInst addq_pattern = 0x43c0141e; 2605569Snate@binkert.org const MachInst subq_pattern = 0x43c0153e; 2615569Snate@binkert.org const MachInst intop_disp_mask = 0x001fe000; 2625569Snate@binkert.org const int intop_disp_shift = 13; 2635569Snate@binkert.org 2645569Snate@binkert.org if ((inst & mem_mask) == lda_pattern) 2655569Snate@binkert.org disp = -sext<16>(inst & lda_disp_mask); 2665569Snate@binkert.org else if ((inst & intop_mask) == addq_pattern) 2675569Snate@binkert.org disp = -int((inst & intop_disp_mask) >> intop_disp_shift); 2685569Snate@binkert.org else if ((inst & intop_mask) == subq_pattern) 2695569Snate@binkert.org disp = int((inst & intop_disp_mask) >> intop_disp_shift); 2705569Snate@binkert.org else 2715569Snate@binkert.org return false; 2725569Snate@binkert.org 2735569Snate@binkert.org return true; 2745569Snate@binkert.org} 2755569Snate@binkert.org 2765569Snate@binkert.orgbool 2775569Snate@binkert.orgStackTrace::decodeSave(MachInst inst, int ®, int &disp) 2785569Snate@binkert.org{ 2795569Snate@binkert.org // lda $stq, disp($sp) 2805569Snate@binkert.org // 2815569Snate@binkert.org // Opcode<31:26> == 0x08 2825569Snate@binkert.org // RA<25:21> == ? 2835569Snate@binkert.org // RB<20:16> == 30 2845569Snate@binkert.org // Disp<15:0> 2855569Snate@binkert.org const MachInst stq_mask = 0xfc1f0000; 2865569Snate@binkert.org const MachInst stq_pattern = 0xb41e0000; 2875569Snate@binkert.org const MachInst stq_disp_mask = 0x0000ffff; 2885569Snate@binkert.org const MachInst reg_mask = 0x03e00000; 2895569Snate@binkert.org const int reg_shift = 21; 2905569Snate@binkert.org 2915569Snate@binkert.org if ((inst & stq_mask) == stq_pattern) { 2925569Snate@binkert.org reg = (inst & reg_mask) >> reg_shift; 2935569Snate@binkert.org disp = sext<16>(inst & stq_disp_mask); 2945569Snate@binkert.org } else { 2951917SN/A return false; 2961917SN/A } 2971917SN/A 2985569Snate@binkert.org return true; 2995569Snate@binkert.org} 3001917SN/A 3015569Snate@binkert.org/* 3025569Snate@binkert.org * Decode the function prologue for the function we're in, and note 3035569Snate@binkert.org * which registers are stored where, and how large the stack frame is. 3045569Snate@binkert.org */ 3055569Snate@binkert.orgbool 3065569Snate@binkert.orgStackTrace::decodePrologue(Addr sp, Addr callpc, Addr func, int &size, 3075569Snate@binkert.org Addr &ra) 3085569Snate@binkert.org{ 3095569Snate@binkert.org size = 0; 3105569Snate@binkert.org ra = 0; 3111917SN/A 3125569Snate@binkert.org for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) { 3135569Snate@binkert.org MachInst inst; 3145569Snate@binkert.org CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst)); 3151917SN/A 3165569Snate@binkert.org int reg, disp; 3175569Snate@binkert.org if (decodeStack(inst, disp)) { 3185569Snate@binkert.org if (size) { 3195569Snate@binkert.org // panic("decoding frame size again"); 3205569Snate@binkert.org return true; 3215569Snate@binkert.org } 3225569Snate@binkert.org size += disp; 3235569Snate@binkert.org } else if (decodeSave(inst, reg, disp)) { 3245569Snate@binkert.org if (!ra && reg == ReturnAddressReg) { 3255569Snate@binkert.org CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr)); 3265569Snate@binkert.org if (!ra) { 3275569Snate@binkert.org // panic("no return address value pc=%#x\n", pc); 3285569Snate@binkert.org return false; 3291917SN/A } 3301917SN/A } 3311917SN/A } 3321917SN/A } 3331917SN/A 3345569Snate@binkert.org return true; 3355569Snate@binkert.org} 3365569Snate@binkert.org 3373570Sgblack@eecs.umich.edu#if TRACING_ON 3385569Snate@binkert.orgvoid 3395569Snate@binkert.orgStackTrace::dump() 3405569Snate@binkert.org{ 3415569Snate@binkert.org StringWrap name(tc->getCpuPtr()->name()); 3425569Snate@binkert.org SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; 3433570Sgblack@eecs.umich.edu 3445569Snate@binkert.org DPRINTFN("------ Stack ------\n"); 3453570Sgblack@eecs.umich.edu 3465569Snate@binkert.org string symbol; 3475569Snate@binkert.org for (int i = 0, size = stack.size(); i < size; ++i) { 3485569Snate@binkert.org Addr addr = stack[size - i - 1]; 3495569Snate@binkert.org if (addr == user) 3505569Snate@binkert.org symbol = "user"; 3515569Snate@binkert.org else if (addr == console) 3525569Snate@binkert.org symbol = "console"; 3535569Snate@binkert.org else if (addr == unknown) 3545569Snate@binkert.org symbol = "unknown"; 3555569Snate@binkert.org else 3565569Snate@binkert.org symtab->findSymbol(addr, symbol); 3573570Sgblack@eecs.umich.edu 3585569Snate@binkert.org DPRINTFN("%#x: %s\n", addr, symbol); 3593570Sgblack@eecs.umich.edu } 3605569Snate@binkert.org} 3613570Sgblack@eecs.umich.edu#endif 3625569Snate@binkert.org 3635569Snate@binkert.org} // namespace AlphaISA 364