blob: 0a8d532574b6340fe7df6dcc9c34221a84aae91e [file] [log] [blame] [edit]
/*
* Copyright 2014, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "DEBUG"
#include <errno.h>
#include <inttypes.h>
#include <stdint.h>
#include <string.h>
#include <sys/ptrace.h>
#include <backtrace/Backtrace.h>
#include <log/log.h>
#include "machine.h"
#include "utility.h"
#define R(x) (static_cast<uintptr_t>(x))
// If configured to do so, dump memory around *all* registers
// for the crashing thread.
void dump_memory_and_code(log_t* log, Backtrace* backtrace) {
pt_regs r;
if (ptrace(PTRACE_GETREGS, backtrace->Tid(), 0, &r)) {
ALOGE("cannot get registers: %s\n", strerror(errno));
return;
}
static const char reg_names[] = "$0atv0v1a0a1a2a3a4a5a6a7t0t1t2t3s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra";
for (int reg = 0; reg < 32; reg++) {
// skip uninteresting registers
if (reg == 0 // $0
|| reg == 26 // $k0
|| reg == 27 // $k1
|| reg == 31 // $ra (done below)
)
continue;
dump_memory(log, backtrace, R(r.regs[reg]), "memory near %.2s:", &reg_names[reg * 2]);
}
uintptr_t pc = R(r.cp0_epc);
uintptr_t ra = R(r.regs[31]);
dump_memory(log, backtrace, pc, "code around pc:");
if (pc != ra) {
dump_memory(log, backtrace, ra, "code around ra:");
}
}
void dump_registers(log_t* log, pid_t tid) {
pt_regs r;
if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
ALOGE("cannot get registers: %s\n", strerror(errno));
return;
}
_LOG(log, logtype::REGISTERS, " zr %016" PRIxPTR " at %016" PRIxPTR
" v0 %016" PRIxPTR " v1 %016" PRIxPTR "\n",
R(r.regs[0]), R(r.regs[1]), R(r.regs[2]), R(r.regs[3]));
_LOG(log, logtype::REGISTERS, " a0 %016" PRIxPTR " a1 %016" PRIxPTR
" a2 %016" PRIxPTR " a3 %016" PRIxPTR "\n",
R(r.regs[4]), R(r.regs[5]), R(r.regs[6]), R(r.regs[7]));
_LOG(log, logtype::REGISTERS, " a4 %016" PRIxPTR " a5 %016" PRIxPTR
" a6 %016" PRIxPTR " a7 %016" PRIxPTR "\n",
R(r.regs[8]), R(r.regs[9]), R(r.regs[10]), R(r.regs[11]));
_LOG(log, logtype::REGISTERS, " t0 %016" PRIxPTR " t1 %016" PRIxPTR
" t2 %016" PRIxPTR " t3 %016" PRIxPTR "\n",
R(r.regs[12]), R(r.regs[13]), R(r.regs[14]), R(r.regs[15]));
_LOG(log, logtype::REGISTERS, " s0 %016" PRIxPTR " s1 %016" PRIxPTR
" s2 %016" PRIxPTR " s3 %016" PRIxPTR "\n",
R(r.regs[16]), R(r.regs[17]), R(r.regs[18]), R(r.regs[19]));
_LOG(log, logtype::REGISTERS, " s4 %016" PRIxPTR " s5 %016" PRIxPTR
" s6 %016" PRIxPTR " s7 %016" PRIxPTR "\n",
R(r.regs[20]), R(r.regs[21]), R(r.regs[22]), R(r.regs[23]));
_LOG(log, logtype::REGISTERS, " t8 %016" PRIxPTR " t9 %016" PRIxPTR
" k0 %016" PRIxPTR " k1 %016" PRIxPTR "\n",
R(r.regs[24]), R(r.regs[25]), R(r.regs[26]), R(r.regs[27]));
_LOG(log, logtype::REGISTERS, " gp %016" PRIxPTR " sp %016" PRIxPTR
" s8 %016" PRIxPTR " ra %016" PRIxPTR "\n",
R(r.regs[28]), R(r.regs[29]), R(r.regs[30]), R(r.regs[31]));
_LOG(log, logtype::REGISTERS, " hi %016" PRIxPTR " lo %016" PRIxPTR
" bva %016" PRIxPTR " epc %016" PRIxPTR "\n",
R(r.hi), R(r.lo), R(r.cp0_badvaddr), R(r.cp0_epc));
}