debuggerd/x86/machine.c

/* system/debuggerd/debuggerd.c
**
** Copyright 2006, 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.
*/

#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/types.h>
#include <dirent.h>

#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/exec_elf.h>
#include <sys/stat.h>

#include <cutils/sockets.h>
#include <cutils/properties.h>

#include <corkscrew/backtrace.h>
#include <corkscrew/ptrace.h>

#include <linux/input.h>

#include "../machine.h"
#include "../utility.h"

static void dump_registers(ptrace_context_t* context __attribute((unused)),
        int tfd, pid_t pid, bool at_fault) {
    struct pt_regs_x86 r;
    bool only_in_tombstone = !at_fault;

    if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
        _LOG(tfd, only_in_tombstone, "cannot get registers: %s\n", strerror(errno));
        return;
    }
    //if there is no stack, no print just like arm
    if(!r.ebp)
        return;
    _LOG(tfd, only_in_tombstone, "    eax %08x  ebx %08x  ecx %08x  edx %08x\n",
         r.eax, r.ebx, r.ecx, r.edx);
    _LOG(tfd, only_in_tombstone, "    esi %08x  edi %08x\n",
         r.esi, r.edi);
    _LOG(tfd, only_in_tombstone, "    xcs %08x  xds %08x  xes %08x  xfs %08x  xss %08x\n",
         r.xcs, r.xds, r.xes, r.xfs, r.xss);
    _LOG(tfd, only_in_tombstone, "    eip %08x  ebp %08x  esp %08x  flags %08x\n",
         r.eip, r.ebp, r.esp, r.eflags);
}

void dump_thread(ptrace_context_t* context, int tfd, pid_t tid, bool at_fault) {
    dump_registers(context, tfd, tid, at_fault);

    dump_backtrace_and_stack(context, tfd, tid, at_fault);

    if (at_fault) {
        dump_nearby_maps(context, tfd, tid);
    }
}