machine.c revision f0c5872637a63e28e3cd314cfc915c07f76df9c6 
1/* system/debuggerd/debuggerd.c
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#include <stdio.h>
19#include <errno.h>
20#include <signal.h>
21#include <pthread.h>
22#include <fcntl.h>
23#include <sys/types.h>
24#include <dirent.h>
25
26#include <sys/ptrace.h>
27#include <sys/wait.h>
28#include <sys/exec_elf.h>
29#include <sys/stat.h>
30
31#include <cutils/sockets.h>
32#include <cutils/properties.h>
33
34#include <corkscrew/backtrace.h>
35#include <corkscrew/ptrace.h>
36
37#include <linux/input.h>
38
39#include "../machine.h"
40#include "../utility.h"
41
42static void dump_registers(const ptrace_context_t* context __attribute((unused)),
43        int tfd, pid_t tid, bool at_fault) {
44    struct pt_regs_x86 r;
45    bool only_in_tombstone = !at_fault;
46
47    if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
48        _LOG(tfd, only_in_tombstone, "cannot get registers: %s\n", strerror(errno));
49        return;
50    }
51    //if there is no stack, no print just like arm
52    if(!r.ebp)
53        return;
54    _LOG(tfd, only_in_tombstone, "    eax %08x  ebx %08x  ecx %08x  edx %08x\n",
55         r.eax, r.ebx, r.ecx, r.edx);
56    _LOG(tfd, only_in_tombstone, "    esi %08x  edi %08x\n",
57         r.esi, r.edi);
58    _LOG(tfd, only_in_tombstone, "    xcs %08x  xds %08x  xes %08x  xfs %08x  xss %08x\n",
59         r.xcs, r.xds, r.xes, r.xfs, r.xss);
60    _LOG(tfd, only_in_tombstone, "    eip %08x  ebp %08x  esp %08x  flags %08x\n",
61         r.eip, r.ebp, r.esp, r.eflags);
62}
63
64void dump_thread(const ptrace_context_t* context, int tfd, pid_t tid, bool at_fault) {
65    dump_registers(context, tfd, tid, at_fault);
66
67    dump_backtrace_and_stack(context, tfd, tid, at_fault);
68
69    if (at_fault) {
70        dump_nearby_maps(context, tfd, tid);
71    }
72}
73
74