d06001d6e0
Add an ArchEnum to express the arch of the Elf objects and Reg objects. Split out the regs code into per arch pieces and generic parts. Also, split out the header files for each arch. Do not break out the test code yet, there isn't enough and it doesn't help to maintain the tests. Test: libunwindstack/libbacktrace/debuggerd unit tests pass. Test: Running debuggerd -b <PIDS> yields valid data on bullhead. Change-Id: If61f6c730c9ff2249f986b41de8c4d62f7158325
112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <elf.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ptrace.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <unwindstack/Elf.h>
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#include <unwindstack/Maps.h>
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#include <unwindstack/Memory.h>
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#include <unwindstack/Regs.h>
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#include <unwindstack/Unwinder.h>
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static bool Attach(pid_t pid) {
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if (ptrace(PTRACE_ATTACH, pid, 0, 0) == -1) {
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return false;
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}
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// Allow at least 1 second to attach properly.
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for (size_t i = 0; i < 1000; i++) {
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siginfo_t si;
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if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
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return true;
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}
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usleep(1000);
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}
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printf("%d: Failed to stop.\n", pid);
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return false;
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}
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void DoUnwind(pid_t pid) {
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unwindstack::RemoteMaps remote_maps(pid);
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if (!remote_maps.Parse()) {
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printf("Failed to parse map data.\n");
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return;
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}
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unwindstack::Regs* regs = unwindstack::Regs::RemoteGet(pid);
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if (regs == nullptr) {
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printf("Unable to get remote reg data\n");
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return;
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}
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printf("ABI: ");
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switch (regs->Arch()) {
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case unwindstack::ARCH_ARM:
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printf("arm");
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break;
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case unwindstack::ARCH_X86:
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printf("x86");
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break;
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case unwindstack::ARCH_ARM64:
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printf("arm64");
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break;
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case unwindstack::ARCH_X86_64:
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printf("x86_64");
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break;
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default:
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printf("unknown\n");
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return;
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}
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printf("\n");
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auto process_memory = unwindstack::Memory::CreateProcessMemory(pid);
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unwindstack::Unwinder unwinder(128, &remote_maps, regs, process_memory);
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unwinder.Unwind();
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// Print the frames.
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for (size_t i = 0; i < unwinder.NumFrames(); i++) {
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printf("%s\n", unwinder.FormatFrame(i).c_str());
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}
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}
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int main(int argc, char** argv) {
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if (argc != 2) {
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printf("Usage: unwind <PID>\n");
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return 1;
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}
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pid_t pid = atoi(argv[1]);
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if (!Attach(pid)) {
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printf("Failed to attach to pid %d: %s\n", pid, strerror(errno));
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return 1;
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}
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DoUnwind(pid);
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ptrace(PTRACE_DETACH, pid, 0, 0);
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return 0;
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}
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