Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 1 | /* |
| 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 Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 17 | #include <elf.h> |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 18 | #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 Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 29 | #include <unwindstack/DexFiles.h> |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 30 | #include <unwindstack/Elf.h> |
Christopher Ferris | 150db12 | 2017-12-20 18:49:01 -0800 | [diff] [blame] | 31 | #include <unwindstack/JitDebug.h> |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 32 | #include <unwindstack/Maps.h> |
| 33 | #include <unwindstack/Memory.h> |
| 34 | #include <unwindstack/Regs.h> |
Christopher Ferris | ae3b136 | 2017-10-05 16:05:44 -0700 | [diff] [blame] | 35 | #include <unwindstack/Unwinder.h> |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 36 | |
| 37 | static bool Attach(pid_t pid) { |
Christopher Ferris | 01040b1 | 2018-12-10 11:13:23 -0800 | [diff] [blame] | 38 | 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 Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 44 | 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 Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 59 | void DoUnwind(pid_t pid) { |
Josh Gao | 0953ecd | 2017-08-25 13:55:06 -0700 | [diff] [blame] | 60 | unwindstack::Regs* regs = unwindstack::Regs::RemoteGet(pid); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 61 | if (regs == nullptr) { |
| 62 | printf("Unable to get remote reg data\n"); |
| 63 | return; |
| 64 | } |
| 65 | |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 66 | printf("ABI: "); |
Christopher Ferris | d06001d | 2017-11-30 18:56:01 -0800 | [diff] [blame] | 67 | switch (regs->Arch()) { |
| 68 | case unwindstack::ARCH_ARM: |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 69 | printf("arm"); |
| 70 | break; |
Christopher Ferris | d06001d | 2017-11-30 18:56:01 -0800 | [diff] [blame] | 71 | case unwindstack::ARCH_X86: |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 72 | printf("x86"); |
| 73 | break; |
Christopher Ferris | d06001d | 2017-11-30 18:56:01 -0800 | [diff] [blame] | 74 | case unwindstack::ARCH_ARM64: |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 75 | printf("arm64"); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 76 | break; |
Christopher Ferris | d06001d | 2017-11-30 18:56:01 -0800 | [diff] [blame] | 77 | case unwindstack::ARCH_X86_64: |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 78 | printf("x86_64"); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 79 | break; |
Douglas Leung | 61b1a1a | 2017-11-08 10:53:53 +0100 | [diff] [blame] | 80 | case unwindstack::ARCH_MIPS: |
| 81 | printf("mips"); |
| 82 | break; |
| 83 | case unwindstack::ARCH_MIPS64: |
| 84 | printf("mips64"); |
| 85 | break; |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 86 | default: |
| 87 | printf("unknown\n"); |
| 88 | return; |
| 89 | } |
| 90 | printf("\n"); |
| 91 | |
Christopher Ferris | eb0772f | 2018-12-05 15:57:02 -0800 | [diff] [blame] | 92 | unwindstack::UnwinderFromPid unwinder(1024, pid); |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 93 | if (!unwinder.Init(regs->Arch())) { |
Christopher Ferris | eb0772f | 2018-12-05 15:57:02 -0800 | [diff] [blame] | 94 | printf("Failed to init unwinder object.\n"); |
| 95 | return; |
| 96 | } |
Christopher Ferris | 7747b60 | 2018-01-31 19:05:19 -0800 | [diff] [blame] | 97 | |
Christopher Ferris | eb0772f | 2018-12-05 15:57:02 -0800 | [diff] [blame] | 98 | unwinder.SetRegs(regs); |
Christopher Ferris | ae3b136 | 2017-10-05 16:05:44 -0700 | [diff] [blame] | 99 | unwinder.Unwind(); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 100 | |
Christopher Ferris | b9de87f | 2017-09-20 13:37:24 -0700 | [diff] [blame] | 101 | // Print the frames. |
Christopher Ferris | ae3b136 | 2017-10-05 16:05:44 -0700 | [diff] [blame] | 102 | for (size_t i = 0; i < unwinder.NumFrames(); i++) { |
| 103 | printf("%s\n", unwinder.FormatFrame(i).c_str()); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 104 | } |
| 105 | } |
| 106 | |
| 107 | int 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 Ferris | ae3b136 | 2017-10-05 16:05:44 -0700 | [diff] [blame] | 121 | ptrace(PTRACE_DETACH, pid, 0, 0); |
Christopher Ferris | b5d7a87 | 2017-07-12 15:40:52 -0700 | [diff] [blame] | 122 | |
| 123 | return 0; |
| 124 | } |