1 /*
2 *
3 * Copyright 2014, 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 #define LOG_TAG "DEBUG"
19
20 #include <elf.h>
21 #include <errno.h>
22 #include <stdint.h>
23 #include <string.h>
24 #include <sys/ptrace.h>
25 #include <sys/uio.h>
26
27 #include <backtrace/Backtrace.h>
28 #include <log/log.h>
29
30 #include "machine.h"
31 #include "utility.h"
32
dump_memory_and_code(log_t * log,Backtrace * backtrace)33 void dump_memory_and_code(log_t* log, Backtrace* backtrace) {
34 struct user_pt_regs regs;
35 struct iovec io;
36 io.iov_base = ®s;
37 io.iov_len = sizeof(regs);
38
39 if (ptrace(PTRACE_GETREGSET, backtrace->Tid(), reinterpret_cast<void*>(NT_PRSTATUS), &io) == -1) {
40 ALOGE("ptrace failed to get registers: %s", strerror(errno));
41 return;
42 }
43
44 for (int reg = 0; reg < 31; reg++) {
45 dump_memory(log, backtrace, regs.regs[reg], "memory near x%d:", reg);
46 }
47
48 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.pc), "code around pc:");
49
50 if (regs.pc != regs.sp) {
51 dump_memory(log, backtrace, static_cast<uintptr_t>(regs.sp), "code around sp:");
52 }
53 }
54
55 #define DUMP_GP_REGISTERS(log) \
56 for (int i = 0; i < 28; i += 4) { \
57 const char* fmt = " x%-2d %016llx x%-2d %016llx x%-2d %016llx x%-2d %016llx\n"; \
58 _LOG(log, logtype::REGISTERS, fmt, i, r.regs[i], i + 1, r.regs[i + 1], i + 2, r.regs[i + 2], \
59 i + 3, r.regs[i + 3]); \
60 } \
61 _LOG(log, logtype::REGISTERS, " x28 %016llx x29 %016llx x30 %016llx\n", r.regs[28], \
62 r.regs[29], r.regs[30]); \
63 _LOG(log, logtype::REGISTERS, " sp %016llx pc %016llx pstate %016llx\n", r.sp, r.pc, \
64 r.pstate)
65
dump_registers(log_t * log,pid_t tid)66 void dump_registers(log_t* log, pid_t tid) {
67 struct user_pt_regs r;
68 struct iovec io;
69 io.iov_base = &r;
70 io.iov_len = sizeof(r);
71
72 if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
73 ALOGE("ptrace error: %s\n", strerror(errno));
74 return;
75 }
76
77 DUMP_GP_REGISTERS(log);
78
79 struct user_fpsimd_state f;
80 io.iov_base = &f;
81 io.iov_len = sizeof(f);
82
83 if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
84 ALOGE("ptrace error: %s\n", strerror(errno));
85 return;
86 }
87
88 for (int i = 0; i < 32; i += 2) {
89 _LOG(log, logtype::FP_REGISTERS,
90 " v%-2d %016" PRIx64 "%016" PRIx64 " v%-2d %016" PRIx64 "%016" PRIx64 "\n",
91 i,
92 static_cast<uint64_t>(f.vregs[i] >> 64),
93 static_cast<uint64_t>(f.vregs[i]),
94 i+1,
95 static_cast<uint64_t>(f.vregs[i+1] >> 64),
96 static_cast<uint64_t>(f.vregs[i+1]));
97 }
98 _LOG(log, logtype::FP_REGISTERS, " fpsr %08x fpcr %08x\n", f.fpsr, f.fpcr);
99 }
100
dump_registers(log_t * log,const ucontext_t * ucontext)101 void dump_registers(log_t* log, const ucontext_t* ucontext) {
102 const mcontext_t& r = ucontext->uc_mcontext;
103 DUMP_GP_REGISTERS(log);
104 }
105