6b95a0e999
There are many subclasses of the Memory class and the overwhelming majority of them don't need to be exposed externally. We move all of them to internal headers except MemoryOfflineBuffer, which moves to a separate header. This dramatically reduces the exposed API surface and makes the code more modular. Also, remove the Offline code from libbacktrace. It's not used any where. Test: Unit tests pass, clean tree still builds Change-Id: I55dacdf080daba0bfe65c1ad53a4b326bb482e83
124 lines
3.3 KiB
C++
124 lines
3.3 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 <stdio.h>
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#include <string.h>
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#include <sys/stat.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/Log.h>
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#include <unwindstack/Memory.h>
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int main(int argc, char** argv) {
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if (argc != 2 && argc != 3) {
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printf("Usage: unwind_symbols <ELF_FILE> [<FUNC_ADDRESS>]\n");
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printf(" Dump all function symbols in ELF_FILE. If FUNC_ADDRESS is\n");
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printf(" specified, then get the function at that address.\n");
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printf(" FUNC_ADDRESS must be a hex number.\n");
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return 1;
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}
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struct stat st;
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if (stat(argv[1], &st) == -1) {
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printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
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return 1;
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}
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if (!S_ISREG(st.st_mode)) {
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printf("%s is not a regular file.\n", argv[1]);
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return 1;
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}
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uint64_t func_addr;
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if (argc == 3) {
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char* name;
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func_addr = strtoull(argv[2], &name, 16);
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if (*name != '\0') {
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printf("%s is not a hex number.\n", argv[2]);
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return 1;
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}
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}
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// Send all log messages to stdout.
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unwindstack::log_to_stdout(true);
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unwindstack::Elf elf(unwindstack::Memory::CreateFileMemory(argv[1], 0).release());
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if (!elf.Init() || !elf.valid()) {
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printf("%s is not a valid elf file.\n", argv[1]);
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return 1;
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}
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std::string soname(elf.GetSoname());
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if (!soname.empty()) {
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printf("Soname: %s\n\n", soname.c_str());
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}
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switch (elf.machine_type()) {
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case EM_ARM:
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printf("ABI: arm\n");
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break;
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case EM_AARCH64:
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printf("ABI: arm64\n");
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break;
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case EM_386:
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printf("ABI: x86\n");
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break;
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case EM_X86_64:
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printf("ABI: x86_64\n");
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break;
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default:
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printf("ABI: unknown\n");
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return 1;
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}
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std::string name;
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if (argc == 3) {
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std::string cur_name;
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uint64_t func_offset;
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if (!elf.GetFunctionName(func_addr, &cur_name, &func_offset)) {
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printf("No known function at 0x%" PRIx64 "\n", func_addr);
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return 1;
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}
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printf("<0x%" PRIx64 ">", func_addr - func_offset);
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if (func_offset != 0) {
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printf("+%" PRId64, func_offset);
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}
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printf(": %s\n", cur_name.c_str());
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return 0;
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}
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// This is a crude way to get the symbols in order.
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for (const auto& entry : elf.interface()->pt_loads()) {
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uint64_t start = entry.second.offset;
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uint64_t end = entry.second.table_size;
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for (uint64_t addr = start; addr < end; addr += 4) {
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std::string cur_name;
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uint64_t func_offset;
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if (elf.GetFunctionName(addr, &cur_name, &func_offset)) {
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if (cur_name != name) {
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printf("<0x%" PRIx64 "> Function: %s\n", addr - func_offset, cur_name.c_str());
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}
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name = cur_name;
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}
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}
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}
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return 0;
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}
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