1639 lines
67 KiB
C++
1639 lines
67 KiB
C++
/*
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* Copyright (C) 2011 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 "oat_file.h"
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#include <dlfcn.h>
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#include <string.h>
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#include <type_traits>
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#include <unistd.h>
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#include <cstdlib>
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#ifndef __APPLE__
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#include <link.h> // for dl_iterate_phdr.
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#endif
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#include <sstream>
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// dlopen_ext support from bionic.
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#ifdef ART_TARGET_ANDROID
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#include "android/dlext.h"
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#endif
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#include "android-base/stringprintf.h"
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#include "art_method.h"
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#include "base/bit_vector.h"
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#include "base/enums.h"
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#include "base/stl_util.h"
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#include "base/systrace.h"
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#include "base/unix_file/fd_file.h"
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#include "dex_file_types.h"
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#include "elf_file.h"
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#include "elf_utils.h"
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#include "gc_root.h"
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#include "oat.h"
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#include "mem_map.h"
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#include "mirror/class.h"
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#include "mirror/object-inl.h"
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#include "oat_file-inl.h"
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#include "oat_file_manager.h"
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#include "os.h"
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#include "runtime.h"
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#include "type_lookup_table.h"
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#include "utf-inl.h"
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#include "utils.h"
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#include "utils/dex_cache_arrays_layout-inl.h"
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#include "vdex_file.h"
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namespace art {
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using android::base::StringPrintf;
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// Whether OatFile::Open will try dlopen. Fallback is our own ELF loader.
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static constexpr bool kUseDlopen = true;
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// Whether OatFile::Open will try dlopen on the host. On the host we're not linking against
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// bionic, so cannot take advantage of the support for changed semantics (loading the same soname
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// multiple times). However, if/when we switch the above, we likely want to switch this, too,
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// to get test coverage of the code paths.
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static constexpr bool kUseDlopenOnHost = true;
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// For debugging, Open will print DlOpen error message if set to true.
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static constexpr bool kPrintDlOpenErrorMessage = false;
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// Note for OatFileBase and descendents:
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//
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// These are used in OatFile::Open to try all our loaders.
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//
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// The process is simple:
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//
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// 1) Allocate an instance through the standard constructor (location, executable)
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// 2) Load() to try to open the file.
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// 3) ComputeFields() to populate the OatFile fields like begin_, using FindDynamicSymbolAddress.
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// 4) PreSetup() for any steps that should be done before the final setup.
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// 5) Setup() to complete the procedure.
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class OatFileBase : public OatFile {
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public:
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virtual ~OatFileBase() {}
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template <typename kOatFileBaseSubType>
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static OatFileBase* OpenOatFile(const std::string& vdex_filename,
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const std::string& elf_filename,
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const std::string& location,
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uint8_t* requested_base,
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uint8_t* oat_file_begin,
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bool writable,
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bool executable,
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bool low_4gb,
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const char* abs_dex_location,
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std::string* error_msg);
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protected:
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OatFileBase(const std::string& filename, bool executable) : OatFile(filename, executable) {}
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virtual const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name,
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std::string* error_msg) const = 0;
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virtual void PreLoad() = 0;
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bool LoadVdex(const std::string& vdex_filename,
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bool writable,
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bool low_4gb,
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std::string* error_msg);
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virtual bool Load(const std::string& elf_filename,
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uint8_t* oat_file_begin,
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bool writable,
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bool executable,
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bool low_4gb,
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std::string* error_msg) = 0;
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bool ComputeFields(uint8_t* requested_base,
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const std::string& file_path,
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std::string* error_msg);
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virtual void PreSetup(const std::string& elf_filename) = 0;
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bool Setup(const char* abs_dex_location, std::string* error_msg);
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// Setters exposed for ElfOatFile.
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void SetBegin(const uint8_t* begin) {
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begin_ = begin;
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}
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void SetEnd(const uint8_t* end) {
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end_ = end;
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}
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void SetVdex(VdexFile* vdex) {
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vdex_.reset(vdex);
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}
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private:
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DISALLOW_COPY_AND_ASSIGN(OatFileBase);
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};
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template <typename kOatFileBaseSubType>
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OatFileBase* OatFileBase::OpenOatFile(const std::string& vdex_filename,
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const std::string& elf_filename,
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const std::string& location,
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uint8_t* requested_base,
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uint8_t* oat_file_begin,
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bool writable,
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bool executable,
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bool low_4gb,
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const char* abs_dex_location,
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std::string* error_msg) {
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std::unique_ptr<OatFileBase> ret(new kOatFileBaseSubType(location, executable));
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ret->PreLoad();
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if (kIsVdexEnabled && !ret->LoadVdex(vdex_filename, writable, low_4gb, error_msg)) {
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return nullptr;
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}
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if (!ret->Load(elf_filename,
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oat_file_begin,
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writable,
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executable,
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low_4gb,
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error_msg)) {
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return nullptr;
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}
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if (!ret->ComputeFields(requested_base, elf_filename, error_msg)) {
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return nullptr;
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}
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ret->PreSetup(elf_filename);
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if (!ret->Setup(abs_dex_location, error_msg)) {
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return nullptr;
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}
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return ret.release();
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}
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bool OatFileBase::LoadVdex(const std::string& vdex_filename,
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bool writable,
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bool low_4gb,
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std::string* error_msg) {
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vdex_ = VdexFile::Open(vdex_filename, writable, low_4gb, /* unquicken*/ false, error_msg);
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if (vdex_.get() == nullptr) {
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*error_msg = StringPrintf("Failed to load vdex file '%s' %s",
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vdex_filename.c_str(),
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error_msg->c_str());
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return false;
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}
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return true;
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}
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bool OatFileBase::ComputeFields(uint8_t* requested_base,
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const std::string& file_path,
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std::string* error_msg) {
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std::string symbol_error_msg;
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begin_ = FindDynamicSymbolAddress("oatdata", &symbol_error_msg);
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if (begin_ == nullptr) {
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*error_msg = StringPrintf("Failed to find oatdata symbol in '%s' %s",
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file_path.c_str(),
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symbol_error_msg.c_str());
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return false;
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}
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if (requested_base != nullptr && begin_ != requested_base) {
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// Host can fail this check. Do not dump there to avoid polluting the output.
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if (kIsTargetBuild && (kIsDebugBuild || VLOG_IS_ON(oat))) {
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PrintFileToLog("/proc/self/maps", LogSeverity::WARNING);
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}
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*error_msg = StringPrintf("Failed to find oatdata symbol at expected address: "
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"oatdata=%p != expected=%p. See process maps in the log.",
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begin_, requested_base);
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return false;
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}
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end_ = FindDynamicSymbolAddress("oatlastword", &symbol_error_msg);
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if (end_ == nullptr) {
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*error_msg = StringPrintf("Failed to find oatlastword symbol in '%s' %s",
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file_path.c_str(),
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symbol_error_msg.c_str());
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return false;
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}
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// Readjust to be non-inclusive upper bound.
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end_ += sizeof(uint32_t);
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bss_begin_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbss", &symbol_error_msg));
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if (bss_begin_ == nullptr) {
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// No .bss section.
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bss_end_ = nullptr;
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} else {
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bss_end_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbsslastword", &symbol_error_msg));
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if (bss_end_ == nullptr) {
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*error_msg = StringPrintf("Failed to find oatbasslastword symbol in '%s'", file_path.c_str());
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return false;
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}
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// Readjust to be non-inclusive upper bound.
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bss_end_ += sizeof(uint32_t);
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// Find bss methods if present.
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bss_methods_ =
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const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbssmethods", &symbol_error_msg));
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// Find bss roots if present.
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bss_roots_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbssroots", &symbol_error_msg));
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}
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return true;
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}
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// Read an unaligned entry from the OatDexFile data in OatFile and advance the read
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// position by the number of bytes read, i.e. sizeof(T).
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// Return true on success, false if the read would go beyond the end of the OatFile.
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template <typename T>
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inline static bool ReadOatDexFileData(const OatFile& oat_file,
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/*inout*/const uint8_t** oat,
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/*out*/T* value) {
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DCHECK(oat != nullptr);
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DCHECK(value != nullptr);
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DCHECK_LE(*oat, oat_file.End());
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if (UNLIKELY(static_cast<size_t>(oat_file.End() - *oat) < sizeof(T))) {
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return false;
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}
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static_assert(std::is_trivial<T>::value, "T must be a trivial type");
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typedef __attribute__((__aligned__(1))) T unaligned_type;
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*value = *reinterpret_cast<const unaligned_type*>(*oat);
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*oat += sizeof(T);
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return true;
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}
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static bool FindDexFileMapItem(const uint8_t* dex_begin,
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const uint8_t* dex_end,
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DexFile::MapItemType map_item_type,
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const DexFile::MapItem** result_item) {
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*result_item = nullptr;
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const DexFile::Header* header =
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BoundsCheckedCast<const DexFile::Header*>(dex_begin, dex_begin, dex_end);
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if (nullptr == header) return false;
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if (!DexFile::IsMagicValid(header->magic_)) return true; // Not a dex file, not an error.
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const DexFile::MapList* map_list =
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BoundsCheckedCast<const DexFile::MapList*>(dex_begin + header->map_off_, dex_begin, dex_end);
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if (nullptr == map_list) return false;
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const DexFile::MapItem* map_item = map_list->list_;
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size_t count = map_list->size_;
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while (count--) {
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if (map_item->type_ == static_cast<uint16_t>(map_item_type)) {
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*result_item = map_item;
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break;
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}
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map_item = BoundsCheckedCast<const DexFile::MapItem*>(map_item + 1, dex_begin, dex_end);
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if (nullptr == map_item) return false;
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}
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return true;
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}
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bool OatFileBase::Setup(const char* abs_dex_location, std::string* error_msg) {
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if (!GetOatHeader().IsValid()) {
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std::string cause = GetOatHeader().GetValidationErrorMessage();
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*error_msg = StringPrintf("Invalid oat header for '%s': %s",
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GetLocation().c_str(),
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cause.c_str());
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return false;
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}
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PointerSize pointer_size = GetInstructionSetPointerSize(GetOatHeader().GetInstructionSet());
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size_t key_value_store_size =
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(Size() >= sizeof(OatHeader)) ? GetOatHeader().GetKeyValueStoreSize() : 0u;
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if (Size() < sizeof(OatHeader) + key_value_store_size) {
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*error_msg = StringPrintf("In oat file '%s' found truncated OatHeader, "
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"size = %zu < %zu + %zu",
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GetLocation().c_str(),
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Size(),
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sizeof(OatHeader),
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key_value_store_size);
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return false;
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}
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size_t oat_dex_files_offset = GetOatHeader().GetOatDexFilesOffset();
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if (oat_dex_files_offset < GetOatHeader().GetHeaderSize() || oat_dex_files_offset > Size()) {
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*error_msg = StringPrintf("In oat file '%s' found invalid oat dex files offset: "
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"%zu is not in [%zu, %zu]",
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GetLocation().c_str(),
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oat_dex_files_offset,
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GetOatHeader().GetHeaderSize(),
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Size());
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return false;
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}
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const uint8_t* oat = Begin() + oat_dex_files_offset; // Jump to the OatDexFile records.
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DCHECK_GE(static_cast<size_t>(pointer_size), alignof(GcRoot<mirror::Object>));
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if (!IsAligned<kPageSize>(bss_begin_) ||
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!IsAlignedParam(bss_methods_, static_cast<size_t>(pointer_size)) ||
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!IsAlignedParam(bss_roots_, static_cast<size_t>(pointer_size)) ||
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!IsAligned<alignof(GcRoot<mirror::Object>)>(bss_end_)) {
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*error_msg = StringPrintf("In oat file '%s' found unaligned bss symbol(s): "
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"begin = %p, methods_ = %p, roots = %p, end = %p",
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GetLocation().c_str(),
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bss_begin_,
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bss_methods_,
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bss_roots_,
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bss_end_);
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return false;
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}
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if ((bss_methods_ != nullptr && (bss_methods_ < bss_begin_ || bss_methods_ > bss_end_)) ||
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(bss_roots_ != nullptr && (bss_roots_ < bss_begin_ || bss_roots_ > bss_end_)) ||
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(bss_methods_ != nullptr && bss_roots_ != nullptr && bss_methods_ > bss_roots_)) {
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*error_msg = StringPrintf("In oat file '%s' found bss symbol(s) outside .bss or unordered: "
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"begin = %p, methods_ = %p, roots = %p, end = %p",
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GetLocation().c_str(),
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bss_begin_,
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bss_methods_,
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bss_roots_,
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bss_end_);
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return false;
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}
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uint8_t* after_arrays = (bss_methods_ != nullptr) ? bss_methods_ : bss_roots_; // May be null.
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uint8_t* dex_cache_arrays = (bss_begin_ == after_arrays) ? nullptr : bss_begin_;
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uint8_t* dex_cache_arrays_end =
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(bss_begin_ == after_arrays) ? nullptr : (after_arrays != nullptr) ? after_arrays : bss_end_;
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DCHECK_EQ(dex_cache_arrays != nullptr, dex_cache_arrays_end != nullptr);
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uint32_t dex_file_count = GetOatHeader().GetDexFileCount();
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oat_dex_files_storage_.reserve(dex_file_count);
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for (size_t i = 0; i < dex_file_count; i++) {
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uint32_t dex_file_location_size;
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if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_location_size))) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu truncated after dex file "
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"location size",
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GetLocation().c_str(),
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i);
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return false;
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}
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if (UNLIKELY(dex_file_location_size == 0U)) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with empty location name",
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GetLocation().c_str(),
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i);
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return false;
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}
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if (UNLIKELY(static_cast<size_t>(End() - oat) < dex_file_location_size)) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with truncated dex file "
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"location",
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GetLocation().c_str(),
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i);
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return false;
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}
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const char* dex_file_location_data = reinterpret_cast<const char*>(oat);
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oat += dex_file_location_size;
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std::string dex_file_location = ResolveRelativeEncodedDexLocation(
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abs_dex_location,
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std::string(dex_file_location_data, dex_file_location_size));
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uint32_t dex_file_checksum;
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if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_checksum))) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated after "
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"dex file checksum",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str());
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return false;
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}
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uint32_t dex_file_offset;
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if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_offset))) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated "
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"after dex file offsets",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str());
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return false;
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}
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if (UNLIKELY(dex_file_offset == 0U)) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with zero dex "
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"file offset",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str());
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return false;
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}
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if (UNLIKELY(dex_file_offset > DexSize())) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file "
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"offset %u > %zu",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str(),
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dex_file_offset,
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DexSize());
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return false;
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}
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if (UNLIKELY(DexSize() - dex_file_offset < sizeof(DexFile::Header))) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file "
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"offset %u of %zu but the size of dex file header is %zu",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str(),
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dex_file_offset,
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DexSize(),
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sizeof(DexFile::Header));
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return false;
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}
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const uint8_t* dex_file_pointer = DexBegin() + dex_file_offset;
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if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) {
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*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with invalid "
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"dex file magic '%s'",
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GetLocation().c_str(),
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i,
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dex_file_location.c_str(),
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dex_file_pointer);
|
|
return false;
|
|
}
|
|
if (UNLIKELY(!DexFile::IsVersionValid(dex_file_pointer))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with invalid "
|
|
"dex file version '%s'",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
dex_file_pointer);
|
|
return false;
|
|
}
|
|
const DexFile::Header* header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer);
|
|
if (DexSize() - dex_file_offset < header->file_size_) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file "
|
|
"offset %u and size %u truncated at %zu",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
dex_file_offset,
|
|
header->file_size_,
|
|
DexSize());
|
|
return false;
|
|
}
|
|
|
|
uint32_t class_offsets_offset;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &class_offsets_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated "
|
|
"after class offsets offset",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
if (UNLIKELY(class_offsets_offset > Size()) ||
|
|
UNLIKELY((Size() - class_offsets_offset) / sizeof(uint32_t) < header->class_defs_size_)) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with truncated "
|
|
"class offsets, offset %u of %zu, class defs %u",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
class_offsets_offset,
|
|
Size(),
|
|
header->class_defs_size_);
|
|
return false;
|
|
}
|
|
if (UNLIKELY(!IsAligned<alignof(uint32_t)>(class_offsets_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with unaligned "
|
|
"class offsets, offset %u",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
class_offsets_offset);
|
|
return false;
|
|
}
|
|
const uint32_t* class_offsets_pointer =
|
|
reinterpret_cast<const uint32_t*>(Begin() + class_offsets_offset);
|
|
|
|
uint32_t lookup_table_offset;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &lookup_table_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated "
|
|
"after lookup table offset",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
const uint8_t* lookup_table_data = lookup_table_offset != 0u
|
|
? Begin() + lookup_table_offset
|
|
: nullptr;
|
|
if (lookup_table_offset != 0u &&
|
|
(UNLIKELY(lookup_table_offset > Size()) ||
|
|
UNLIKELY(Size() - lookup_table_offset <
|
|
TypeLookupTable::RawDataLength(header->class_defs_size_)))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with truncated "
|
|
"type lookup table, offset %u of %zu, class defs %u",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
lookup_table_offset,
|
|
Size(),
|
|
header->class_defs_size_);
|
|
return false;
|
|
}
|
|
|
|
uint32_t dex_layout_sections_offset;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_layout_sections_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated "
|
|
"after dex layout sections offset",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
const DexLayoutSections* const dex_layout_sections = dex_layout_sections_offset != 0
|
|
? reinterpret_cast<const DexLayoutSections*>(Begin() + dex_layout_sections_offset)
|
|
: nullptr;
|
|
|
|
uint32_t method_bss_mapping_offset;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &method_bss_mapping_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated "
|
|
"after method bss mapping offset",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
const bool readable_method_bss_mapping_size =
|
|
method_bss_mapping_offset != 0u &&
|
|
method_bss_mapping_offset <= Size() &&
|
|
IsAligned<alignof(MethodBssMapping)>(method_bss_mapping_offset) &&
|
|
Size() - method_bss_mapping_offset >= MethodBssMapping::ComputeSize(0);
|
|
const MethodBssMapping* method_bss_mapping = readable_method_bss_mapping_size
|
|
? reinterpret_cast<const MethodBssMapping*>(Begin() + method_bss_mapping_offset)
|
|
: nullptr;
|
|
if (method_bss_mapping_offset != 0u &&
|
|
(UNLIKELY(method_bss_mapping == nullptr) ||
|
|
UNLIKELY(method_bss_mapping->size() == 0u) ||
|
|
UNLIKELY(Size() - method_bss_mapping_offset <
|
|
MethodBssMapping::ComputeSize(method_bss_mapping->size())))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with unaligned or "
|
|
" truncated method bss mapping, offset %u of %zu, length %zu",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
method_bss_mapping_offset,
|
|
Size(),
|
|
method_bss_mapping != nullptr ? method_bss_mapping->size() : 0u);
|
|
return false;
|
|
}
|
|
if (kIsDebugBuild && method_bss_mapping != nullptr) {
|
|
const MethodBssMappingEntry* prev_entry = nullptr;
|
|
for (const MethodBssMappingEntry& entry : *method_bss_mapping) {
|
|
CHECK_ALIGNED_PARAM(entry.bss_offset, static_cast<size_t>(pointer_size));
|
|
CHECK_LT(entry.bss_offset, BssSize());
|
|
CHECK_LE(POPCOUNT(entry.index_mask) * static_cast<size_t>(pointer_size), entry.bss_offset);
|
|
size_t index_mask_span = (entry.index_mask != 0u) ? 16u - CTZ(entry.index_mask) : 0u;
|
|
CHECK_LE(index_mask_span, entry.method_index);
|
|
if (prev_entry != nullptr) {
|
|
CHECK_LT(prev_entry->method_index, entry.method_index - index_mask_span);
|
|
}
|
|
prev_entry = &entry;
|
|
}
|
|
CHECK_LT(prev_entry->method_index,
|
|
reinterpret_cast<const DexFile::Header*>(dex_file_pointer)->method_ids_size_);
|
|
}
|
|
|
|
uint8_t* current_dex_cache_arrays = nullptr;
|
|
if (dex_cache_arrays != nullptr) {
|
|
// All DexCache types except for CallSite have their instance counts in the
|
|
// DexFile header. For CallSites, we need to read the info from the MapList.
|
|
const DexFile::MapItem* call_sites_item = nullptr;
|
|
if (!FindDexFileMapItem(DexBegin(),
|
|
DexEnd(),
|
|
DexFile::MapItemType::kDexTypeCallSiteIdItem,
|
|
&call_sites_item)) {
|
|
*error_msg = StringPrintf("In oat file '%s' could not read data from truncated DexFile map",
|
|
GetLocation().c_str());
|
|
return false;
|
|
}
|
|
size_t num_call_sites = call_sites_item == nullptr ? 0 : call_sites_item->size_;
|
|
DexCacheArraysLayout layout(pointer_size, *header, num_call_sites);
|
|
if (layout.Size() != 0u) {
|
|
if (static_cast<size_t>(dex_cache_arrays_end - dex_cache_arrays) < layout.Size()) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with "
|
|
"truncated dex cache arrays, %zu < %zu.",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
static_cast<size_t>(dex_cache_arrays_end - dex_cache_arrays),
|
|
layout.Size());
|
|
return false;
|
|
}
|
|
current_dex_cache_arrays = dex_cache_arrays;
|
|
dex_cache_arrays += layout.Size();
|
|
}
|
|
}
|
|
|
|
std::string canonical_location = DexFile::GetDexCanonicalLocation(dex_file_location.c_str());
|
|
|
|
// Create the OatDexFile and add it to the owning container.
|
|
OatDexFile* oat_dex_file = new OatDexFile(this,
|
|
dex_file_location,
|
|
canonical_location,
|
|
dex_file_checksum,
|
|
dex_file_pointer,
|
|
lookup_table_data,
|
|
method_bss_mapping,
|
|
class_offsets_pointer,
|
|
current_dex_cache_arrays,
|
|
dex_layout_sections);
|
|
oat_dex_files_storage_.push_back(oat_dex_file);
|
|
|
|
// Add the location and canonical location (if different) to the oat_dex_files_ table.
|
|
StringPiece key(oat_dex_file->GetDexFileLocation());
|
|
oat_dex_files_.Put(key, oat_dex_file);
|
|
if (canonical_location != dex_file_location) {
|
|
StringPiece canonical_key(oat_dex_file->GetCanonicalDexFileLocation());
|
|
oat_dex_files_.Put(canonical_key, oat_dex_file);
|
|
}
|
|
}
|
|
|
|
if (dex_cache_arrays != dex_cache_arrays_end) {
|
|
// We expect the bss section to be either empty (dex_cache_arrays and bss_end_
|
|
// both null) or contain just the dex cache arrays and optionally some GC roots.
|
|
*error_msg = StringPrintf("In oat file '%s' found unexpected bss size bigger by %zu bytes.",
|
|
GetLocation().c_str(),
|
|
static_cast<size_t>(bss_end_ - dex_cache_arrays));
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
////////////////////////
|
|
// OatFile via dlopen //
|
|
////////////////////////
|
|
|
|
class DlOpenOatFile FINAL : public OatFileBase {
|
|
public:
|
|
DlOpenOatFile(const std::string& filename, bool executable)
|
|
: OatFileBase(filename, executable),
|
|
dlopen_handle_(nullptr),
|
|
shared_objects_before_(0) {
|
|
}
|
|
|
|
~DlOpenOatFile() {
|
|
if (dlopen_handle_ != nullptr) {
|
|
if (!kIsTargetBuild) {
|
|
MutexLock mu(Thread::Current(), *Locks::host_dlopen_handles_lock_);
|
|
host_dlopen_handles_.erase(dlopen_handle_);
|
|
dlclose(dlopen_handle_);
|
|
} else {
|
|
dlclose(dlopen_handle_);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected:
|
|
const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name,
|
|
std::string* error_msg) const OVERRIDE {
|
|
const uint8_t* ptr =
|
|
reinterpret_cast<const uint8_t*>(dlsym(dlopen_handle_, symbol_name.c_str()));
|
|
if (ptr == nullptr) {
|
|
*error_msg = dlerror();
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
void PreLoad() OVERRIDE;
|
|
|
|
bool Load(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) OVERRIDE;
|
|
|
|
// Ask the linker where it mmaped the file and notify our mmap wrapper of the regions.
|
|
void PreSetup(const std::string& elf_filename) OVERRIDE;
|
|
|
|
private:
|
|
bool Dlopen(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin,
|
|
std::string* error_msg);
|
|
|
|
// On the host, if the same library is loaded again with dlopen the same
|
|
// file handle is returned. This differs from the behavior of dlopen on the
|
|
// target, where dlopen reloads the library at a different address every
|
|
// time you load it. The runtime relies on the target behavior to ensure
|
|
// each instance of the loaded library has a unique dex cache. To avoid
|
|
// problems, we fall back to our own linker in the case when the same
|
|
// library is opened multiple times on host. dlopen_handles_ is used to
|
|
// detect that case.
|
|
// Guarded by host_dlopen_handles_lock_;
|
|
static std::unordered_set<void*> host_dlopen_handles_;
|
|
|
|
// dlopen handle during runtime.
|
|
void* dlopen_handle_; // TODO: Unique_ptr with custom deleter.
|
|
|
|
// Dummy memory map objects corresponding to the regions mapped by dlopen.
|
|
std::vector<std::unique_ptr<MemMap>> dlopen_mmaps_;
|
|
|
|
// The number of shared objects the linker told us about before loading. Used to
|
|
// (optimistically) optimize the PreSetup stage (see comment there).
|
|
size_t shared_objects_before_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DlOpenOatFile);
|
|
};
|
|
|
|
std::unordered_set<void*> DlOpenOatFile::host_dlopen_handles_;
|
|
|
|
void DlOpenOatFile::PreLoad() {
|
|
#ifdef __APPLE__
|
|
UNUSED(shared_objects_before_);
|
|
LOG(FATAL) << "Should not reach here.";
|
|
UNREACHABLE();
|
|
#else
|
|
// Count the entries in dl_iterate_phdr we get at this point in time.
|
|
struct dl_iterate_context {
|
|
static int callback(struct dl_phdr_info *info ATTRIBUTE_UNUSED,
|
|
size_t size ATTRIBUTE_UNUSED,
|
|
void *data) {
|
|
reinterpret_cast<dl_iterate_context*>(data)->count++;
|
|
return 0; // Continue iteration.
|
|
}
|
|
size_t count = 0;
|
|
} context;
|
|
|
|
dl_iterate_phdr(dl_iterate_context::callback, &context);
|
|
shared_objects_before_ = context.count;
|
|
#endif
|
|
}
|
|
|
|
bool DlOpenOatFile::Load(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) {
|
|
// Use dlopen only when flagged to do so, and when it's OK to load things executable.
|
|
// TODO: Also try when not executable? The issue here could be re-mapping as writable (as
|
|
// !executable is a sign that we may want to patch), which may not be allowed for
|
|
// various reasons.
|
|
if (!kUseDlopen) {
|
|
*error_msg = "DlOpen is disabled.";
|
|
return false;
|
|
}
|
|
if (low_4gb) {
|
|
*error_msg = "DlOpen does not support low 4gb loading.";
|
|
return false;
|
|
}
|
|
if (writable) {
|
|
*error_msg = "DlOpen does not support writable loading.";
|
|
return false;
|
|
}
|
|
if (!executable) {
|
|
*error_msg = "DlOpen does not support non-executable loading.";
|
|
return false;
|
|
}
|
|
|
|
// dlopen always returns the same library if it is already opened on the host. For this reason
|
|
// we only use dlopen if we are the target or we do not already have the dex file opened. Having
|
|
// the same library loaded multiple times at different addresses is required for class unloading
|
|
// and for having dex caches arrays in the .bss section.
|
|
if (!kIsTargetBuild) {
|
|
if (!kUseDlopenOnHost) {
|
|
*error_msg = "DlOpen disabled for host.";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool success = Dlopen(elf_filename, oat_file_begin, error_msg);
|
|
DCHECK(dlopen_handle_ != nullptr || !success);
|
|
|
|
return success;
|
|
}
|
|
|
|
bool DlOpenOatFile::Dlopen(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin,
|
|
std::string* error_msg) {
|
|
#ifdef __APPLE__
|
|
// The dl_iterate_phdr syscall is missing. There is similar API on OSX,
|
|
// but let's fallback to the custom loading code for the time being.
|
|
UNUSED(elf_filename, oat_file_begin);
|
|
*error_msg = "Dlopen unsupported on Mac.";
|
|
return false;
|
|
#else
|
|
{
|
|
UniqueCPtr<char> absolute_path(realpath(elf_filename.c_str(), nullptr));
|
|
if (absolute_path == nullptr) {
|
|
*error_msg = StringPrintf("Failed to find absolute path for '%s'", elf_filename.c_str());
|
|
return false;
|
|
}
|
|
#ifdef ART_TARGET_ANDROID
|
|
android_dlextinfo extinfo = {};
|
|
extinfo.flags = ANDROID_DLEXT_FORCE_LOAD | // Force-load, don't reuse handle
|
|
// (open oat files multiple
|
|
// times).
|
|
ANDROID_DLEXT_FORCE_FIXED_VADDR; // Take a non-zero vaddr as absolute
|
|
// (non-pic boot image).
|
|
if (oat_file_begin != nullptr) { //
|
|
extinfo.flags |= ANDROID_DLEXT_LOAD_AT_FIXED_ADDRESS; // Use the requested addr if
|
|
extinfo.reserved_addr = oat_file_begin; // vaddr = 0.
|
|
} // (pic boot image).
|
|
dlopen_handle_ = android_dlopen_ext(absolute_path.get(), RTLD_NOW, &extinfo);
|
|
#else
|
|
UNUSED(oat_file_begin);
|
|
static_assert(!kIsTargetBuild || kIsTargetLinux, "host_dlopen_handles_ will leak handles");
|
|
MutexLock mu(Thread::Current(), *Locks::host_dlopen_handles_lock_);
|
|
dlopen_handle_ = dlopen(absolute_path.get(), RTLD_NOW);
|
|
if (dlopen_handle_ != nullptr) {
|
|
if (!host_dlopen_handles_.insert(dlopen_handle_).second) {
|
|
dlclose(dlopen_handle_);
|
|
dlopen_handle_ = nullptr;
|
|
*error_msg = StringPrintf("host dlopen re-opened '%s'", elf_filename.c_str());
|
|
return false;
|
|
}
|
|
}
|
|
#endif // ART_TARGET_ANDROID
|
|
}
|
|
if (dlopen_handle_ == nullptr) {
|
|
*error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror());
|
|
return false;
|
|
}
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
void DlOpenOatFile::PreSetup(const std::string& elf_filename) {
|
|
#ifdef __APPLE__
|
|
UNUSED(elf_filename);
|
|
LOG(FATAL) << "Should not reach here.";
|
|
UNREACHABLE();
|
|
#else
|
|
struct dl_iterate_context {
|
|
static int callback(struct dl_phdr_info *info, size_t /* size */, void *data) {
|
|
auto* context = reinterpret_cast<dl_iterate_context*>(data);
|
|
context->shared_objects_seen++;
|
|
if (context->shared_objects_seen < context->shared_objects_before) {
|
|
// We haven't been called yet for anything we haven't seen before. Just continue.
|
|
// Note: this is aggressively optimistic. If another thread was unloading a library,
|
|
// we may miss out here. However, this does not happen often in practice.
|
|
return 0;
|
|
}
|
|
|
|
// See whether this callback corresponds to the file which we have just loaded.
|
|
bool contains_begin = false;
|
|
for (int i = 0; i < info->dlpi_phnum; i++) {
|
|
if (info->dlpi_phdr[i].p_type == PT_LOAD) {
|
|
uint8_t* vaddr = reinterpret_cast<uint8_t*>(info->dlpi_addr +
|
|
info->dlpi_phdr[i].p_vaddr);
|
|
size_t memsz = info->dlpi_phdr[i].p_memsz;
|
|
if (vaddr <= context->begin_ && context->begin_ < vaddr + memsz) {
|
|
contains_begin = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Add dummy mmaps for this file.
|
|
if (contains_begin) {
|
|
for (int i = 0; i < info->dlpi_phnum; i++) {
|
|
if (info->dlpi_phdr[i].p_type == PT_LOAD) {
|
|
uint8_t* vaddr = reinterpret_cast<uint8_t*>(info->dlpi_addr +
|
|
info->dlpi_phdr[i].p_vaddr);
|
|
size_t memsz = info->dlpi_phdr[i].p_memsz;
|
|
MemMap* mmap = MemMap::MapDummy(info->dlpi_name, vaddr, memsz);
|
|
context->dlopen_mmaps_->push_back(std::unique_ptr<MemMap>(mmap));
|
|
}
|
|
}
|
|
return 1; // Stop iteration and return 1 from dl_iterate_phdr.
|
|
}
|
|
return 0; // Continue iteration and return 0 from dl_iterate_phdr when finished.
|
|
}
|
|
const uint8_t* const begin_;
|
|
std::vector<std::unique_ptr<MemMap>>* const dlopen_mmaps_;
|
|
const size_t shared_objects_before;
|
|
size_t shared_objects_seen;
|
|
};
|
|
dl_iterate_context context = { Begin(), &dlopen_mmaps_, shared_objects_before_, 0};
|
|
|
|
if (dl_iterate_phdr(dl_iterate_context::callback, &context) == 0) {
|
|
// Hm. Maybe our optimization went wrong. Try another time with shared_objects_before == 0
|
|
// before giving up. This should be unusual.
|
|
VLOG(oat) << "Need a second run in PreSetup, didn't find with shared_objects_before="
|
|
<< shared_objects_before_;
|
|
dl_iterate_context context0 = { Begin(), &dlopen_mmaps_, 0, 0};
|
|
if (dl_iterate_phdr(dl_iterate_context::callback, &context0) == 0) {
|
|
// OK, give up and print an error.
|
|
PrintFileToLog("/proc/self/maps", LogSeverity::WARNING);
|
|
LOG(ERROR) << "File " << elf_filename << " loaded with dlopen but cannot find its mmaps.";
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
////////////////////////////////////////////////
|
|
// OatFile via our own ElfFile implementation //
|
|
////////////////////////////////////////////////
|
|
|
|
class ElfOatFile FINAL : public OatFileBase {
|
|
public:
|
|
ElfOatFile(const std::string& filename, bool executable) : OatFileBase(filename, executable) {}
|
|
|
|
static ElfOatFile* OpenElfFile(File* file,
|
|
const std::string& location,
|
|
uint8_t* requested_base,
|
|
uint8_t* oat_file_begin, // Override base if not null
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg);
|
|
|
|
bool InitializeFromElfFile(ElfFile* elf_file,
|
|
VdexFile* vdex_file,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg);
|
|
|
|
protected:
|
|
const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name,
|
|
std::string* error_msg) const OVERRIDE {
|
|
const uint8_t* ptr = elf_file_->FindDynamicSymbolAddress(symbol_name);
|
|
if (ptr == nullptr) {
|
|
*error_msg = "(Internal implementation could not find symbol)";
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
void PreLoad() OVERRIDE {
|
|
}
|
|
|
|
bool Load(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin, // Override where the file is loaded to if not null
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) OVERRIDE;
|
|
|
|
void PreSetup(const std::string& elf_filename ATTRIBUTE_UNUSED) OVERRIDE {
|
|
}
|
|
|
|
private:
|
|
bool ElfFileOpen(File* file,
|
|
uint8_t* oat_file_begin, // Override where the file is loaded to if not null
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg);
|
|
|
|
private:
|
|
// Backing memory map for oat file during cross compilation.
|
|
std::unique_ptr<ElfFile> elf_file_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ElfOatFile);
|
|
};
|
|
|
|
ElfOatFile* ElfOatFile::OpenElfFile(File* file,
|
|
const std::string& location,
|
|
uint8_t* requested_base,
|
|
uint8_t* oat_file_begin, // Override base if not null
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
ScopedTrace trace("Open elf file " + location);
|
|
std::unique_ptr<ElfOatFile> oat_file(new ElfOatFile(location, executable));
|
|
bool success = oat_file->ElfFileOpen(file,
|
|
oat_file_begin,
|
|
writable,
|
|
low_4gb,
|
|
executable,
|
|
error_msg);
|
|
if (!success) {
|
|
CHECK(!error_msg->empty());
|
|
return nullptr;
|
|
}
|
|
|
|
// Complete the setup.
|
|
if (!oat_file->ComputeFields(requested_base, file->GetPath(), error_msg)) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!oat_file->Setup(abs_dex_location, error_msg)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return oat_file.release();
|
|
}
|
|
|
|
bool ElfOatFile::InitializeFromElfFile(ElfFile* elf_file,
|
|
VdexFile* vdex_file,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
ScopedTrace trace(__PRETTY_FUNCTION__);
|
|
if (IsExecutable()) {
|
|
*error_msg = "Cannot initialize from elf file in executable mode.";
|
|
return false;
|
|
}
|
|
elf_file_.reset(elf_file);
|
|
SetVdex(vdex_file);
|
|
uint64_t offset, size;
|
|
bool has_section = elf_file->GetSectionOffsetAndSize(".rodata", &offset, &size);
|
|
CHECK(has_section);
|
|
SetBegin(elf_file->Begin() + offset);
|
|
SetEnd(elf_file->Begin() + size + offset);
|
|
// Ignore the optional .bss section when opening non-executable.
|
|
return Setup(abs_dex_location, error_msg);
|
|
}
|
|
|
|
bool ElfOatFile::Load(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin, // Override where the file is loaded to if not null
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) {
|
|
ScopedTrace trace(__PRETTY_FUNCTION__);
|
|
std::unique_ptr<File> file(OS::OpenFileForReading(elf_filename.c_str()));
|
|
if (file == nullptr) {
|
|
*error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno));
|
|
return false;
|
|
}
|
|
return ElfOatFile::ElfFileOpen(file.get(),
|
|
oat_file_begin,
|
|
writable,
|
|
executable,
|
|
low_4gb,
|
|
error_msg);
|
|
}
|
|
|
|
bool ElfOatFile::ElfFileOpen(File* file,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) {
|
|
ScopedTrace trace(__PRETTY_FUNCTION__);
|
|
// TODO: rename requested_base to oat_data_begin
|
|
elf_file_.reset(ElfFile::Open(file,
|
|
writable,
|
|
/*program_header_only*/true,
|
|
low_4gb,
|
|
error_msg,
|
|
oat_file_begin));
|
|
if (elf_file_ == nullptr) {
|
|
DCHECK(!error_msg->empty());
|
|
return false;
|
|
}
|
|
bool loaded = elf_file_->Load(file, executable, low_4gb, error_msg);
|
|
DCHECK(loaded || !error_msg->empty());
|
|
return loaded;
|
|
}
|
|
|
|
//////////////////////////
|
|
// General OatFile code //
|
|
//////////////////////////
|
|
|
|
std::string OatFile::ResolveRelativeEncodedDexLocation(
|
|
const char* abs_dex_location, const std::string& rel_dex_location) {
|
|
if (abs_dex_location != nullptr && rel_dex_location[0] != '/') {
|
|
// Strip :classes<N>.dex used for secondary multidex files.
|
|
std::string base = DexFile::GetBaseLocation(rel_dex_location);
|
|
std::string multidex_suffix = DexFile::GetMultiDexSuffix(rel_dex_location);
|
|
|
|
// Check if the base is a suffix of the provided abs_dex_location.
|
|
std::string target_suffix = "/" + base;
|
|
std::string abs_location(abs_dex_location);
|
|
if (abs_location.size() > target_suffix.size()) {
|
|
size_t pos = abs_location.size() - target_suffix.size();
|
|
if (abs_location.compare(pos, std::string::npos, target_suffix) == 0) {
|
|
return abs_location + multidex_suffix;
|
|
}
|
|
}
|
|
}
|
|
return rel_dex_location;
|
|
}
|
|
|
|
static void CheckLocation(const std::string& location) {
|
|
CHECK(!location.empty());
|
|
}
|
|
|
|
OatFile* OatFile::OpenWithElfFile(ElfFile* elf_file,
|
|
VdexFile* vdex_file,
|
|
const std::string& location,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
std::unique_ptr<ElfOatFile> oat_file(new ElfOatFile(location, false /* executable */));
|
|
return oat_file->InitializeFromElfFile(elf_file, vdex_file, abs_dex_location, error_msg)
|
|
? oat_file.release()
|
|
: nullptr;
|
|
}
|
|
|
|
OatFile* OatFile::Open(const std::string& oat_filename,
|
|
const std::string& oat_location,
|
|
uint8_t* requested_base,
|
|
uint8_t* oat_file_begin,
|
|
bool executable,
|
|
bool low_4gb,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
ScopedTrace trace("Open oat file " + oat_location);
|
|
CHECK(!oat_filename.empty()) << oat_location;
|
|
CheckLocation(oat_location);
|
|
|
|
std::string vdex_filename = GetVdexFilename(oat_filename);
|
|
|
|
// Check that the files even exist, fast-fail.
|
|
if (kIsVdexEnabled && !OS::FileExists(vdex_filename.c_str())) {
|
|
*error_msg = StringPrintf("File %s does not exist.", vdex_filename.c_str());
|
|
return nullptr;
|
|
} else if (!OS::FileExists(oat_filename.c_str())) {
|
|
*error_msg = StringPrintf("File %s does not exist.", oat_filename.c_str());
|
|
return nullptr;
|
|
}
|
|
|
|
// Try dlopen first, as it is required for native debuggability. This will fail fast if dlopen is
|
|
// disabled.
|
|
OatFile* with_dlopen = OatFileBase::OpenOatFile<DlOpenOatFile>(vdex_filename,
|
|
oat_filename,
|
|
oat_location,
|
|
requested_base,
|
|
oat_file_begin,
|
|
false /* writable */,
|
|
executable,
|
|
low_4gb,
|
|
abs_dex_location,
|
|
error_msg);
|
|
if (with_dlopen != nullptr) {
|
|
return with_dlopen;
|
|
}
|
|
if (kPrintDlOpenErrorMessage) {
|
|
LOG(ERROR) << "Failed to dlopen: " << oat_filename << " with error " << *error_msg;
|
|
}
|
|
// If we aren't trying to execute, we just use our own ElfFile loader for a couple reasons:
|
|
//
|
|
// On target, dlopen may fail when compiling due to selinux restrictions on installd.
|
|
//
|
|
// We use our own ELF loader for Quick to deal with legacy apps that
|
|
// open a generated dex file by name, remove the file, then open
|
|
// another generated dex file with the same name. http://b/10614658
|
|
//
|
|
// On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile.
|
|
//
|
|
//
|
|
// Another independent reason is the absolute placement of boot.oat. dlopen on the host usually
|
|
// does honor the virtual address encoded in the ELF file only for ET_EXEC files, not ET_DYN.
|
|
OatFile* with_internal = OatFileBase::OpenOatFile<ElfOatFile>(vdex_filename,
|
|
oat_filename,
|
|
oat_location,
|
|
requested_base,
|
|
oat_file_begin,
|
|
false /* writable */,
|
|
executable,
|
|
low_4gb,
|
|
abs_dex_location,
|
|
error_msg);
|
|
return with_internal;
|
|
}
|
|
|
|
OatFile* OatFile::OpenWritable(File* file,
|
|
const std::string& location,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
CheckLocation(location);
|
|
return ElfOatFile::OpenElfFile(file,
|
|
location,
|
|
nullptr,
|
|
nullptr,
|
|
true,
|
|
false,
|
|
/*low_4gb*/false,
|
|
abs_dex_location,
|
|
error_msg);
|
|
}
|
|
|
|
OatFile* OatFile::OpenReadable(File* file,
|
|
const std::string& location,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
CheckLocation(location);
|
|
return ElfOatFile::OpenElfFile(file,
|
|
location,
|
|
nullptr,
|
|
nullptr,
|
|
false,
|
|
false,
|
|
/*low_4gb*/false,
|
|
abs_dex_location,
|
|
error_msg);
|
|
}
|
|
|
|
OatFile::OatFile(const std::string& location, bool is_executable)
|
|
: location_(location),
|
|
vdex_(nullptr),
|
|
begin_(nullptr),
|
|
end_(nullptr),
|
|
bss_begin_(nullptr),
|
|
bss_end_(nullptr),
|
|
bss_methods_(nullptr),
|
|
bss_roots_(nullptr),
|
|
is_executable_(is_executable),
|
|
secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) {
|
|
CHECK(!location_.empty());
|
|
}
|
|
|
|
OatFile::~OatFile() {
|
|
STLDeleteElements(&oat_dex_files_storage_);
|
|
}
|
|
|
|
const OatHeader& OatFile::GetOatHeader() const {
|
|
return *reinterpret_cast<const OatHeader*>(Begin());
|
|
}
|
|
|
|
const uint8_t* OatFile::Begin() const {
|
|
CHECK(begin_ != nullptr);
|
|
return begin_;
|
|
}
|
|
|
|
const uint8_t* OatFile::End() const {
|
|
CHECK(end_ != nullptr);
|
|
return end_;
|
|
}
|
|
|
|
const uint8_t* OatFile::BssBegin() const {
|
|
return bss_begin_;
|
|
}
|
|
|
|
const uint8_t* OatFile::BssEnd() const {
|
|
return bss_end_;
|
|
}
|
|
|
|
const uint8_t* OatFile::DexBegin() const {
|
|
return kIsVdexEnabled ? vdex_->Begin() : Begin();
|
|
}
|
|
|
|
const uint8_t* OatFile::DexEnd() const {
|
|
return kIsVdexEnabled ? vdex_->End() : End();
|
|
}
|
|
|
|
ArrayRef<ArtMethod*> OatFile::GetBssMethods() const {
|
|
if (bss_methods_ != nullptr) {
|
|
ArtMethod** methods = reinterpret_cast<ArtMethod**>(bss_methods_);
|
|
ArtMethod** methods_end =
|
|
reinterpret_cast<ArtMethod**>(bss_roots_ != nullptr ? bss_roots_ : bss_end_);
|
|
return ArrayRef<ArtMethod*>(methods, methods_end - methods);
|
|
} else {
|
|
return ArrayRef<ArtMethod*>();
|
|
}
|
|
}
|
|
|
|
ArrayRef<GcRoot<mirror::Object>> OatFile::GetBssGcRoots() const {
|
|
if (bss_roots_ != nullptr) {
|
|
auto* roots = reinterpret_cast<GcRoot<mirror::Object>*>(bss_roots_);
|
|
auto* roots_end = reinterpret_cast<GcRoot<mirror::Object>*>(bss_end_);
|
|
return ArrayRef<GcRoot<mirror::Object>>(roots, roots_end - roots);
|
|
} else {
|
|
return ArrayRef<GcRoot<mirror::Object>>();
|
|
}
|
|
}
|
|
|
|
const OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location,
|
|
const uint32_t* dex_location_checksum,
|
|
std::string* error_msg) const {
|
|
// NOTE: We assume here that the canonical location for a given dex_location never
|
|
// changes. If it does (i.e. some symlink used by the filename changes) we may return
|
|
// an incorrect OatDexFile. As long as we have a checksum to check, we shall return
|
|
// an identical file or fail; otherwise we may see some unpredictable failures.
|
|
|
|
// TODO: Additional analysis of usage patterns to see if this can be simplified
|
|
// without any performance loss, for example by not doing the first lock-free lookup.
|
|
|
|
const OatFile::OatDexFile* oat_dex_file = nullptr;
|
|
StringPiece key(dex_location);
|
|
// Try to find the key cheaply in the oat_dex_files_ map which holds dex locations
|
|
// directly mentioned in the oat file and doesn't require locking.
|
|
auto primary_it = oat_dex_files_.find(key);
|
|
if (primary_it != oat_dex_files_.end()) {
|
|
oat_dex_file = primary_it->second;
|
|
DCHECK(oat_dex_file != nullptr);
|
|
} else {
|
|
// This dex_location is not one of the dex locations directly mentioned in the
|
|
// oat file. The correct lookup is via the canonical location but first see in
|
|
// the secondary_oat_dex_files_ whether we've looked up this location before.
|
|
MutexLock mu(Thread::Current(), secondary_lookup_lock_);
|
|
auto secondary_lb = secondary_oat_dex_files_.lower_bound(key);
|
|
if (secondary_lb != secondary_oat_dex_files_.end() && key == secondary_lb->first) {
|
|
oat_dex_file = secondary_lb->second; // May be null.
|
|
} else {
|
|
// We haven't seen this dex_location before, we must check the canonical location.
|
|
std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
|
|
if (dex_canonical_location != dex_location) {
|
|
StringPiece canonical_key(dex_canonical_location);
|
|
auto canonical_it = oat_dex_files_.find(canonical_key);
|
|
if (canonical_it != oat_dex_files_.end()) {
|
|
oat_dex_file = canonical_it->second;
|
|
} // else keep null.
|
|
} // else keep null.
|
|
|
|
// Copy the key to the string_cache_ and store the result in secondary map.
|
|
string_cache_.emplace_back(key.data(), key.length());
|
|
StringPiece key_copy(string_cache_.back());
|
|
secondary_oat_dex_files_.PutBefore(secondary_lb, key_copy, oat_dex_file);
|
|
}
|
|
}
|
|
|
|
if (oat_dex_file == nullptr) {
|
|
if (error_msg != nullptr) {
|
|
std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
|
|
*error_msg = "Failed to find OatDexFile for DexFile " + std::string(dex_location)
|
|
+ " (canonical path " + dex_canonical_location + ") in OatFile " + GetLocation();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
if (dex_location_checksum != nullptr &&
|
|
oat_dex_file->GetDexFileLocationChecksum() != *dex_location_checksum) {
|
|
if (error_msg != nullptr) {
|
|
std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
|
|
std::string checksum = StringPrintf("0x%08x", oat_dex_file->GetDexFileLocationChecksum());
|
|
std::string required_checksum = StringPrintf("0x%08x", *dex_location_checksum);
|
|
*error_msg = "OatDexFile for DexFile " + std::string(dex_location)
|
|
+ " (canonical path " + dex_canonical_location + ") in OatFile " + GetLocation()
|
|
+ " has checksum " + checksum + " but " + required_checksum + " was required";
|
|
}
|
|
return nullptr;
|
|
}
|
|
return oat_dex_file;
|
|
}
|
|
|
|
OatFile::OatDexFile::OatDexFile(const OatFile* oat_file,
|
|
const std::string& dex_file_location,
|
|
const std::string& canonical_dex_file_location,
|
|
uint32_t dex_file_location_checksum,
|
|
const uint8_t* dex_file_pointer,
|
|
const uint8_t* lookup_table_data,
|
|
const MethodBssMapping* method_bss_mapping_data,
|
|
const uint32_t* oat_class_offsets_pointer,
|
|
uint8_t* dex_cache_arrays,
|
|
const DexLayoutSections* dex_layout_sections)
|
|
: oat_file_(oat_file),
|
|
dex_file_location_(dex_file_location),
|
|
canonical_dex_file_location_(canonical_dex_file_location),
|
|
dex_file_location_checksum_(dex_file_location_checksum),
|
|
dex_file_pointer_(dex_file_pointer),
|
|
lookup_table_data_(lookup_table_data),
|
|
method_bss_mapping_(method_bss_mapping_data),
|
|
oat_class_offsets_pointer_(oat_class_offsets_pointer),
|
|
dex_cache_arrays_(dex_cache_arrays),
|
|
dex_layout_sections_(dex_layout_sections) {
|
|
// Initialize TypeLookupTable.
|
|
if (lookup_table_data_ != nullptr) {
|
|
// Peek the number of classes from the DexFile.
|
|
const DexFile::Header* dex_header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer_);
|
|
const uint32_t num_class_defs = dex_header->class_defs_size_;
|
|
if (lookup_table_data_ + TypeLookupTable::RawDataLength(num_class_defs) > GetOatFile()->End()) {
|
|
LOG(WARNING) << "found truncated lookup table in " << dex_file_location_;
|
|
} else {
|
|
lookup_table_ = TypeLookupTable::Open(dex_file_pointer_, lookup_table_data_, num_class_defs);
|
|
}
|
|
}
|
|
}
|
|
|
|
OatFile::OatDexFile::OatDexFile(std::unique_ptr<TypeLookupTable>&& lookup_table)
|
|
: lookup_table_(std::move(lookup_table)) {}
|
|
|
|
OatFile::OatDexFile::~OatDexFile() {}
|
|
|
|
size_t OatFile::OatDexFile::FileSize() const {
|
|
return reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_;
|
|
}
|
|
|
|
std::unique_ptr<const DexFile> OatFile::OatDexFile::OpenDexFile(std::string* error_msg) const {
|
|
ScopedTrace trace(__PRETTY_FUNCTION__);
|
|
static constexpr bool kVerify = false;
|
|
static constexpr bool kVerifyChecksum = false;
|
|
return DexFile::Open(dex_file_pointer_,
|
|
FileSize(),
|
|
dex_file_location_,
|
|
dex_file_location_checksum_,
|
|
this,
|
|
kVerify,
|
|
kVerifyChecksum,
|
|
error_msg);
|
|
}
|
|
|
|
uint32_t OatFile::OatDexFile::GetOatClassOffset(uint16_t class_def_index) const {
|
|
return oat_class_offsets_pointer_[class_def_index];
|
|
}
|
|
|
|
OatFile::OatClass OatFile::OatDexFile::GetOatClass(uint16_t class_def_index) const {
|
|
uint32_t oat_class_offset = GetOatClassOffset(class_def_index);
|
|
|
|
const uint8_t* oat_class_pointer = oat_file_->Begin() + oat_class_offset;
|
|
CHECK_LT(oat_class_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
|
|
const uint8_t* status_pointer = oat_class_pointer;
|
|
CHECK_LT(status_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
mirror::Class::Status status =
|
|
static_cast<mirror::Class::Status>(*reinterpret_cast<const int16_t*>(status_pointer));
|
|
CHECK_LT(status, mirror::Class::kStatusMax);
|
|
|
|
const uint8_t* type_pointer = status_pointer + sizeof(uint16_t);
|
|
CHECK_LT(type_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
OatClassType type = static_cast<OatClassType>(*reinterpret_cast<const uint16_t*>(type_pointer));
|
|
CHECK_LT(type, kOatClassMax);
|
|
|
|
const uint8_t* after_type_pointer = type_pointer + sizeof(int16_t);
|
|
CHECK_LE(after_type_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
|
|
uint32_t bitmap_size = 0;
|
|
const uint8_t* bitmap_pointer = nullptr;
|
|
const uint8_t* methods_pointer = nullptr;
|
|
if (type != kOatClassNoneCompiled) {
|
|
if (type == kOatClassSomeCompiled) {
|
|
bitmap_size = static_cast<uint32_t>(*reinterpret_cast<const uint32_t*>(after_type_pointer));
|
|
bitmap_pointer = after_type_pointer + sizeof(bitmap_size);
|
|
CHECK_LE(bitmap_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
methods_pointer = bitmap_pointer + bitmap_size;
|
|
} else {
|
|
methods_pointer = after_type_pointer;
|
|
}
|
|
CHECK_LE(methods_pointer, oat_file_->End()) << oat_file_->GetLocation();
|
|
}
|
|
|
|
return OatFile::OatClass(oat_file_,
|
|
status,
|
|
type,
|
|
bitmap_size,
|
|
reinterpret_cast<const uint32_t*>(bitmap_pointer),
|
|
reinterpret_cast<const OatMethodOffsets*>(methods_pointer));
|
|
}
|
|
|
|
const DexFile::ClassDef* OatFile::OatDexFile::FindClassDef(const DexFile& dex_file,
|
|
const char* descriptor,
|
|
size_t hash) {
|
|
const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
|
|
DCHECK_EQ(ComputeModifiedUtf8Hash(descriptor), hash);
|
|
if (LIKELY((oat_dex_file != nullptr) && (oat_dex_file->GetTypeLookupTable() != nullptr))) {
|
|
const uint32_t class_def_idx = oat_dex_file->GetTypeLookupTable()->Lookup(descriptor, hash);
|
|
return (class_def_idx != DexFile::kDexNoIndex) ? &dex_file.GetClassDef(class_def_idx) : nullptr;
|
|
}
|
|
// Fast path for rare no class defs case.
|
|
const uint32_t num_class_defs = dex_file.NumClassDefs();
|
|
if (num_class_defs == 0) {
|
|
return nullptr;
|
|
}
|
|
const DexFile::TypeId* type_id = dex_file.FindTypeId(descriptor);
|
|
if (type_id != nullptr) {
|
|
dex::TypeIndex type_idx = dex_file.GetIndexForTypeId(*type_id);
|
|
return dex_file.FindClassDef(type_idx);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Madvise the dex file based on the state we are moving to.
|
|
void OatDexFile::MadviseDexFile(const DexFile& dex_file, MadviseState state) {
|
|
Runtime* const runtime = Runtime::Current();
|
|
const bool low_ram = runtime->GetHeap()->IsLowMemoryMode();
|
|
// TODO: Also do madvise hints for non low ram devices.
|
|
if (!low_ram) {
|
|
return;
|
|
}
|
|
if (state == MadviseState::kMadviseStateAtLoad && runtime->MAdviseRandomAccess()) {
|
|
// Default every dex file to MADV_RANDOM when its loaded by default for low ram devices.
|
|
// Other devices have enough page cache to get performance benefits from loading more pages
|
|
// into the page cache.
|
|
MadviseLargestPageAlignedRegion(dex_file.Begin(),
|
|
dex_file.Begin() + dex_file.Size(),
|
|
MADV_RANDOM);
|
|
}
|
|
const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
|
|
if (oat_dex_file != nullptr) {
|
|
// Should always be there.
|
|
const DexLayoutSections* const sections = oat_dex_file->GetDexLayoutSections();
|
|
CHECK(sections != nullptr);
|
|
sections->Madvise(&dex_file, state);
|
|
}
|
|
}
|
|
|
|
OatFile::OatClass::OatClass(const OatFile* oat_file,
|
|
mirror::Class::Status status,
|
|
OatClassType type,
|
|
uint32_t bitmap_size,
|
|
const uint32_t* bitmap_pointer,
|
|
const OatMethodOffsets* methods_pointer)
|
|
: oat_file_(oat_file), status_(status), type_(type),
|
|
bitmap_(bitmap_pointer), methods_pointer_(methods_pointer) {
|
|
switch (type_) {
|
|
case kOatClassAllCompiled: {
|
|
CHECK_EQ(0U, bitmap_size);
|
|
CHECK(bitmap_pointer == nullptr);
|
|
CHECK(methods_pointer != nullptr);
|
|
break;
|
|
}
|
|
case kOatClassSomeCompiled: {
|
|
CHECK_NE(0U, bitmap_size);
|
|
CHECK(bitmap_pointer != nullptr);
|
|
CHECK(methods_pointer != nullptr);
|
|
break;
|
|
}
|
|
case kOatClassNoneCompiled: {
|
|
CHECK_EQ(0U, bitmap_size);
|
|
CHECK(bitmap_pointer == nullptr);
|
|
CHECK(methods_pointer_ == nullptr);
|
|
break;
|
|
}
|
|
case kOatClassMax: {
|
|
LOG(FATAL) << "Invalid OatClassType " << type_;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t OatFile::OatClass::GetOatMethodOffsetsOffset(uint32_t method_index) const {
|
|
const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index);
|
|
if (oat_method_offsets == nullptr) {
|
|
return 0u;
|
|
}
|
|
return reinterpret_cast<const uint8_t*>(oat_method_offsets) - oat_file_->Begin();
|
|
}
|
|
|
|
const OatMethodOffsets* OatFile::OatClass::GetOatMethodOffsets(uint32_t method_index) const {
|
|
// NOTE: We don't keep the number of methods and cannot do a bounds check for method_index.
|
|
if (methods_pointer_ == nullptr) {
|
|
CHECK_EQ(kOatClassNoneCompiled, type_);
|
|
return nullptr;
|
|
}
|
|
size_t methods_pointer_index;
|
|
if (bitmap_ == nullptr) {
|
|
CHECK_EQ(kOatClassAllCompiled, type_);
|
|
methods_pointer_index = method_index;
|
|
} else {
|
|
CHECK_EQ(kOatClassSomeCompiled, type_);
|
|
if (!BitVector::IsBitSet(bitmap_, method_index)) {
|
|
return nullptr;
|
|
}
|
|
size_t num_set_bits = BitVector::NumSetBits(bitmap_, method_index);
|
|
methods_pointer_index = num_set_bits;
|
|
}
|
|
const OatMethodOffsets& oat_method_offsets = methods_pointer_[methods_pointer_index];
|
|
return &oat_method_offsets;
|
|
}
|
|
|
|
const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const {
|
|
const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index);
|
|
if (oat_method_offsets == nullptr) {
|
|
return OatMethod(nullptr, 0);
|
|
}
|
|
if (oat_file_->IsExecutable() ||
|
|
Runtime::Current() == nullptr || // This case applies for oatdump.
|
|
Runtime::Current()->IsAotCompiler()) {
|
|
return OatMethod(oat_file_->Begin(), oat_method_offsets->code_offset_);
|
|
}
|
|
// We aren't allowed to use the compiled code. We just force it down the interpreted / jit
|
|
// version.
|
|
return OatMethod(oat_file_->Begin(), 0);
|
|
}
|
|
|
|
void OatFile::OatMethod::LinkMethod(ArtMethod* method) const {
|
|
CHECK(method != nullptr);
|
|
method->SetEntryPointFromQuickCompiledCode(GetQuickCode());
|
|
}
|
|
|
|
bool OatFile::IsPic() const {
|
|
return GetOatHeader().IsPic();
|
|
// TODO: Check against oat_patches. b/18144996
|
|
}
|
|
|
|
bool OatFile::IsDebuggable() const {
|
|
return GetOatHeader().IsDebuggable();
|
|
}
|
|
|
|
CompilerFilter::Filter OatFile::GetCompilerFilter() const {
|
|
return GetOatHeader().GetCompilerFilter();
|
|
}
|
|
|
|
std::string OatFile::GetClassLoaderContext() const {
|
|
return GetOatHeader().GetStoreValueByKey(OatHeader::kClassPathKey);
|
|
};
|
|
|
|
OatFile::OatClass OatFile::FindOatClass(const DexFile& dex_file,
|
|
uint16_t class_def_idx,
|
|
bool* found) {
|
|
DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16);
|
|
const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
|
|
if (oat_dex_file == nullptr || oat_dex_file->GetOatFile() == nullptr) {
|
|
*found = false;
|
|
return OatFile::OatClass::Invalid();
|
|
}
|
|
*found = true;
|
|
return oat_dex_file->GetOatClass(class_def_idx);
|
|
}
|
|
|
|
void OatFile::OatDexFile::AssertAotCompiler() {
|
|
CHECK(Runtime::Current()->IsAotCompiler());
|
|
}
|
|
|
|
} // namespace art
|