62ba489ba0
The system by which debuggerd filters its output to different locations is now based on an enum called logtype with easy to understand categories for log messages (like THREAD, MEMORY, etc.) instead of the old, fairly esoteric scope_flags variable. Now much of the output that previously went to logcat does not show up on the screen, but all output can be found in the tombstone file. In addition, the tombstone's location is now printed so it can be located easily. Bug: 15341747 Change-Id: Ia2f2051d1dfdea934d0e6ed220f24345e35ba6a2
112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/*
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* Copyright 2012, 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 int>(x))
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// The MIPS uapi ptrace.h has the wrong definition for pt_regs. PTRACE_GETREGS
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// writes 64-bit quantities even though the public struct uses 32-bit ones.
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struct pt_regs_mips_t {
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uint64_t regs[32];
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uint64_t lo;
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uint64_t hi;
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uint64_t cp0_epc;
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uint64_t cp0_badvaddr;
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uint64_t cp0_status;
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uint64_t cp0_cause;
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};
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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_mips_t 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[] = "$0atv0v1a0a1a2a3t0t1t2t3t4t5t6t7s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra";
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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 >= 0x80000000) {
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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 int pc = R(r.cp0_epc);
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unsigned int 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_mips_t r;
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if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
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LOG_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 %08x at %08x v0 %08x v1 %08x\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 %08x a1 %08x a2 %08x a3 %08x\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, " t0 %08x t1 %08x t2 %08x t3 %08x\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, " t4 %08x t5 %08x t6 %08x t7 %08x\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 %08x s1 %08x s2 %08x s3 %08x\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 %08x s5 %08x s6 %08x s7 %08x\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 %08x t9 %08x k0 %08x k1 %08x\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 %08x sp %08x s8 %08x ra %08x\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 %08x lo %08x bva %08x epc %08x\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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