100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
/*
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* Copyright 2014, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/user.h>
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#include "../utility.h"
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#include "../machine.h"
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#define R(x) (static_cast<unsigned long>(x))
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// If configured to do so, dump memory around *all* registers
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// for the crashing thread.
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void dump_memory_and_code(log_t* log, pid_t tid) {
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pt_regs r;
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if (ptrace(PTRACE_GETREGS, tid, 0, &r)) {
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return;
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}
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static const char REG_NAMES[] = "$0atv0v1a0a1a2a3a4a5a6a7t0t1t2t3s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra";
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for (int reg = 0; reg < 32; reg++) {
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// skip uninteresting registers
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if (reg == 0 // $0
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|| reg == 26 // $k0
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|| reg == 27 // $k1
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|| reg == 31 // $ra (done below)
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)
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continue;
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uintptr_t addr = R(r.regs[reg]);
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// Don't bother if it looks like a small int or ~= null, or if
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// it's in the kernel area.
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if (addr < 4096 || addr >= 0x4000000000000000) {
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continue;
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}
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_LOG(log, logtype::MEMORY, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]);
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dump_memory(log, tid, addr);
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}
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unsigned long pc = R(r.cp0_epc);
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unsigned long ra = R(r.regs[31]);
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_LOG(log, logtype::MEMORY, "\ncode around pc:\n");
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dump_memory(log, tid, (uintptr_t)pc);
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if (pc != ra) {
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_LOG(log, logtype::MEMORY, "\ncode around ra:\n");
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dump_memory(log, tid, (uintptr_t)ra);
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}
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}
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void dump_registers(log_t* log, pid_t tid) {
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pt_regs r;
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if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
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_LOG(log, logtype::ERROR, "cannot get registers: %s\n", strerror(errno));
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return;
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}
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_LOG(log, logtype::REGISTERS, " zr %016lx at %016lx v0 %016lx v1 %016lx\n",
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R(r.regs[0]), R(r.regs[1]), R(r.regs[2]), R(r.regs[3]));
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_LOG(log, logtype::REGISTERS, " a0 %016lx a1 %016lx a2 %016lx a3 %016lx\n",
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R(r.regs[4]), R(r.regs[5]), R(r.regs[6]), R(r.regs[7]));
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_LOG(log, logtype::REGISTERS, " a4 %016lx a5 %016lx a6 %016lx a7 %016lx\n",
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R(r.regs[8]), R(r.regs[9]), R(r.regs[10]), R(r.regs[11]));
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_LOG(log, logtype::REGISTERS, " t0 %016lx t1 %016lx t2 %016lx t3 %016lx\n",
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R(r.regs[12]), R(r.regs[13]), R(r.regs[14]), R(r.regs[15]));
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_LOG(log, logtype::REGISTERS, " s0 %016lx s1 %016lx s2 %016lx s3 %016lx\n",
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R(r.regs[16]), R(r.regs[17]), R(r.regs[18]), R(r.regs[19]));
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_LOG(log, logtype::REGISTERS, " s4 %016lx s5 %016lx s6 %016lx s7 %016lx\n",
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R(r.regs[20]), R(r.regs[21]), R(r.regs[22]), R(r.regs[23]));
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_LOG(log, logtype::REGISTERS, " t8 %016lx t9 %016lx k0 %016lx k1 %016lx\n",
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R(r.regs[24]), R(r.regs[25]), R(r.regs[26]), R(r.regs[27]));
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_LOG(log, logtype::REGISTERS, " gp %016lx sp %016lx s8 %016lx ra %016lx\n",
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R(r.regs[28]), R(r.regs[29]), R(r.regs[30]), R(r.regs[31]));
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_LOG(log, logtype::REGISTERS, " hi %016lx lo %016lx bva %016lx epc %016lx\n",
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R(r.hi), R(r.lo), R(r.cp0_badvaddr), R(r.cp0_epc));
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}
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