119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
/*
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*
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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 <ctype.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 <sys/uio.h>
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#include <linux/elf.h>
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#include "../utility.h"
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#include "../machine.h"
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/* enable to dump memory pointed to by every register */
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#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
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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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*/
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void dump_memory_and_code(log_t* log, pid_t tid) {
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struct user_pt_regs regs;
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struct iovec io;
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io.iov_base = ®s;
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io.iov_len = sizeof(regs);
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if (ptrace(PTRACE_GETREGSET, tid, (void*)NT_PRSTATUS, &io) == -1) {
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_LOG(log, logtype::ERROR, "%s: ptrace failed to get registers: %s\n",
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__func__, strerror(errno));
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return;
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}
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for (int reg = 0; reg < 31; reg++) {
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uintptr_t addr = regs.regs[reg];
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/*
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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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*/
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if (addr < 4096 || addr >= (1UL<<63)) {
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continue;
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}
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_LOG(log, logtype::MEMORY, "\nmemory near x%d:\n", reg);
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dump_memory(log, tid, addr);
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}
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_LOG(log, logtype::MEMORY, "\ncode around pc:\n");
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dump_memory(log, tid, (uintptr_t)regs.pc);
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if (regs.pc != regs.sp) {
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_LOG(log, logtype::MEMORY, "\ncode around sp:\n");
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dump_memory(log, tid, (uintptr_t)regs.sp);
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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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struct user_pt_regs r;
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struct iovec io;
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io.iov_base = &r;
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io.iov_len = sizeof(r);
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if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
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_LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
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return;
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}
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for (int i = 0; i < 28; i += 4) {
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_LOG(log, logtype::REGISTERS,
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" x%-2d %016lx x%-2d %016lx x%-2d %016lx x%-2d %016lx\n",
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i, (uint64_t)r.regs[i],
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i+1, (uint64_t)r.regs[i+1],
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i+2, (uint64_t)r.regs[i+2],
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i+3, (uint64_t)r.regs[i+3]);
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}
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_LOG(log, logtype::REGISTERS, " x28 %016lx x29 %016lx x30 %016lx\n",
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(uint64_t)r.regs[28], (uint64_t)r.regs[29], (uint64_t)r.regs[30]);
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_LOG(log, logtype::REGISTERS, " sp %016lx pc %016lx\n",
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(uint64_t)r.sp, (uint64_t)r.pc);
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struct user_fpsimd_state f;
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io.iov_base = &f;
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io.iov_len = sizeof(f);
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if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
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_LOG(log, logtype::ERROR, "ptrace error: %s\n", strerror(errno));
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return;
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}
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for (int i = 0; i < 32; i += 4) {
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_LOG(log, logtype::REGISTERS, " v%-2d %016lx v%-2d %016lx v%-2d %016lx v%-2d %016lx\n",
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i, (uint64_t)f.vregs[i],
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i+1, (uint64_t)f.vregs[i+1],
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i+2, (uint64_t)f.vregs[i+2],
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i+3, (uint64_t)f.vregs[i+3]);
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}
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}
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