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Christopher Ferrisb5d7a872017-07-12 15:40:52 -07001/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Christopher Ferrisd226a512017-07-14 10:37:19 -070017#include <elf.h>
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070018#include <errno.h>
19#include <inttypes.h>
20#include <signal.h>
21#include <stdint.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/ptrace.h>
26#include <sys/types.h>
27#include <unistd.h>
28
David Srbeckyb9cc4fb2019-04-05 18:23:32 +000029#include <unwindstack/DexFiles.h>
Christopher Ferrisd226a512017-07-14 10:37:19 -070030#include <unwindstack/Elf.h>
Christopher Ferris150db122017-12-20 18:49:01 -080031#include <unwindstack/JitDebug.h>
Christopher Ferrisd226a512017-07-14 10:37:19 -070032#include <unwindstack/Maps.h>
33#include <unwindstack/Memory.h>
34#include <unwindstack/Regs.h>
Christopher Ferrisae3b1362017-10-05 16:05:44 -070035#include <unwindstack/Unwinder.h>
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070036
37static bool Attach(pid_t pid) {
Christopher Ferris01040b12018-12-10 11:13:23 -080038 if (ptrace(PTRACE_SEIZE, pid, 0, 0) == -1) {
39 return false;
40 }
41
42 if (ptrace(PTRACE_INTERRUPT, pid, 0, 0) == -1) {
43 ptrace(PTRACE_DETACH, pid, 0, 0);
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070044 return false;
45 }
46
47 // Allow at least 1 second to attach properly.
48 for (size_t i = 0; i < 1000; i++) {
49 siginfo_t si;
50 if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
51 return true;
52 }
53 usleep(1000);
54 }
55 printf("%d: Failed to stop.\n", pid);
56 return false;
57}
58
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070059void DoUnwind(pid_t pid) {
Josh Gao0953ecd2017-08-25 13:55:06 -070060 unwindstack::Regs* regs = unwindstack::Regs::RemoteGet(pid);
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070061 if (regs == nullptr) {
62 printf("Unable to get remote reg data\n");
63 return;
64 }
65
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070066 printf("ABI: ");
Christopher Ferrisd06001d2017-11-30 18:56:01 -080067 switch (regs->Arch()) {
68 case unwindstack::ARCH_ARM:
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070069 printf("arm");
70 break;
Christopher Ferrisd06001d2017-11-30 18:56:01 -080071 case unwindstack::ARCH_X86:
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070072 printf("x86");
73 break;
Christopher Ferrisd06001d2017-11-30 18:56:01 -080074 case unwindstack::ARCH_ARM64:
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070075 printf("arm64");
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070076 break;
Christopher Ferrisd06001d2017-11-30 18:56:01 -080077 case unwindstack::ARCH_X86_64:
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070078 printf("x86_64");
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070079 break;
Douglas Leung61b1a1a2017-11-08 10:53:53 +010080 case unwindstack::ARCH_MIPS:
81 printf("mips");
82 break;
83 case unwindstack::ARCH_MIPS64:
84 printf("mips64");
85 break;
Christopher Ferrisb5d7a872017-07-12 15:40:52 -070086 default:
87 printf("unknown\n");
88 return;
89 }
90 printf("\n");
91
Christopher Ferriseb0772f2018-12-05 15:57:02 -080092 unwindstack::UnwinderFromPid unwinder(1024, pid);
David Srbeckyb9cc4fb2019-04-05 18:23:32 +000093 if (!unwinder.Init(regs->Arch())) {
Christopher Ferriseb0772f2018-12-05 15:57:02 -080094 printf("Failed to init unwinder object.\n");
95 return;
96 }
Christopher Ferris7747b602018-01-31 19:05:19 -080097
Christopher Ferriseb0772f2018-12-05 15:57:02 -080098 unwinder.SetRegs(regs);
Christopher Ferrisae3b1362017-10-05 16:05:44 -070099 unwinder.Unwind();
Christopher Ferrisb5d7a872017-07-12 15:40:52 -0700100
Christopher Ferrisb9de87f2017-09-20 13:37:24 -0700101 // Print the frames.
Christopher Ferrisae3b1362017-10-05 16:05:44 -0700102 for (size_t i = 0; i < unwinder.NumFrames(); i++) {
103 printf("%s\n", unwinder.FormatFrame(i).c_str());
Christopher Ferrisb5d7a872017-07-12 15:40:52 -0700104 }
105}
106
107int main(int argc, char** argv) {
108 if (argc != 2) {
109 printf("Usage: unwind <PID>\n");
110 return 1;
111 }
112
113 pid_t pid = atoi(argv[1]);
114 if (!Attach(pid)) {
115 printf("Failed to attach to pid %d: %s\n", pid, strerror(errno));
116 return 1;
117 }
118
119 DoUnwind(pid);
120
Christopher Ferrisae3b1362017-10-05 16:05:44 -0700121 ptrace(PTRACE_DETACH, pid, 0, 0);
Christopher Ferrisb5d7a872017-07-12 15:40:52 -0700122
123 return 0;
124}