7747b60faa
Fixes cdex which was recently changed to have shared data section, which means the DEX PC cannot be used to find the right symbol, as the bytecode is no longer within the dex file, and in-fact, we might have to scan multiple dex files to find the method. Bug: 72520014 Test: testrunner.py --host --cdex-none -t 137 Test: testrunner.py --host --cdex-fast -t 137 Test: All unit tests pass. Change-Id: I80265d05ad69dd9cefbe3f8a75e4cd349002af5e
127 lines
3 KiB
C++
127 lines
3 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/DexFiles.h>
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#include <unwindstack/Elf.h>
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#include <unwindstack/JitDebug.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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case unwindstack::ARCH_MIPS:
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printf("mips");
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break;
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case unwindstack::ARCH_MIPS64:
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printf("mips64");
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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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unwindstack::JitDebug jit_debug(process_memory);
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unwinder.SetJitDebug(&jit_debug, regs->Arch());
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unwindstack::DexFiles dex_files(process_memory);
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unwinder.SetDexFiles(&dex_files, regs->Arch());
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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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