1413 lines
55 KiB
C++
1413 lines
55 KiB
C++
/*
|
|
* Copyright (C) 2011 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "oat_file.h"
|
|
|
|
#include <dlfcn.h>
|
|
#include <string.h>
|
|
#include <type_traits>
|
|
#include <unistd.h>
|
|
|
|
#include <cstdlib>
|
|
#ifndef __APPLE__
|
|
#include <link.h> // for dl_iterate_phdr.
|
|
#endif
|
|
#include <sstream>
|
|
|
|
// dlopen_ext support from bionic.
|
|
#ifdef __ANDROID__
|
|
#include "android/dlext.h"
|
|
#endif
|
|
|
|
#include "art_method-inl.h"
|
|
#include "base/bit_vector.h"
|
|
#include "base/stl_util.h"
|
|
#include "base/systrace.h"
|
|
#include "base/unix_file/fd_file.h"
|
|
#include "elf_file.h"
|
|
#include "elf_utils.h"
|
|
#include "oat.h"
|
|
#include "mem_map.h"
|
|
#include "mirror/class.h"
|
|
#include "mirror/object-inl.h"
|
|
#include "oat_file-inl.h"
|
|
#include "oat_file_manager.h"
|
|
#include "os.h"
|
|
#include "runtime.h"
|
|
#include "type_lookup_table.h"
|
|
#include "utils.h"
|
|
#include "utils/dex_cache_arrays_layout-inl.h"
|
|
|
|
namespace art {
|
|
|
|
// Whether OatFile::Open will try dlopen. Fallback is our own ELF loader.
|
|
static constexpr bool kUseDlopen = true;
|
|
|
|
// Whether OatFile::Open will try dlopen on the host. On the host we're not linking against
|
|
// bionic, so cannot take advantage of the support for changed semantics (loading the same soname
|
|
// multiple times). However, if/when we switch the above, we likely want to switch this, too,
|
|
// to get test coverage of the code paths.
|
|
static constexpr bool kUseDlopenOnHost = true;
|
|
|
|
// For debugging, Open will print DlOpen error message if set to true.
|
|
static constexpr bool kPrintDlOpenErrorMessage = false;
|
|
|
|
// Note for OatFileBase and descendents:
|
|
//
|
|
// These are used in OatFile::Open to try all our loaders.
|
|
//
|
|
// The process is simple:
|
|
//
|
|
// 1) Allocate an instance through the standard constructor (location, executable)
|
|
// 2) Load() to try to open the file.
|
|
// 3) ComputeFields() to populate the OatFile fields like begin_, using FindDynamicSymbolAddress.
|
|
// 4) PreSetup() for any steps that should be done before the final setup.
|
|
// 5) Setup() to complete the procedure.
|
|
|
|
class OatFileBase : public OatFile {
|
|
public:
|
|
virtual ~OatFileBase() {}
|
|
|
|
template <typename kOatFileBaseSubType>
|
|
static OatFileBase* OpenOatFile(const std::string& elf_filename,
|
|
const std::string& location,
|
|
uint8_t* requested_base,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg);
|
|
|
|
protected:
|
|
OatFileBase(const std::string& filename, bool executable) : OatFile(filename, executable) {}
|
|
|
|
virtual const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name,
|
|
std::string* error_msg) const = 0;
|
|
|
|
virtual void PreLoad() = 0;
|
|
|
|
virtual bool Load(const std::string& elf_filename,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
std::string* error_msg) = 0;
|
|
|
|
bool ComputeFields(uint8_t* requested_base,
|
|
const std::string& file_path,
|
|
std::string* error_msg);
|
|
|
|
virtual void PreSetup(const std::string& elf_filename) = 0;
|
|
|
|
bool Setup(const char* abs_dex_location, std::string* error_msg);
|
|
|
|
// Setters exposed for ElfOatFile.
|
|
|
|
void SetBegin(const uint8_t* begin) {
|
|
begin_ = begin;
|
|
}
|
|
|
|
void SetEnd(const uint8_t* end) {
|
|
end_ = end;
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(OatFileBase);
|
|
};
|
|
|
|
template <typename kOatFileBaseSubType>
|
|
OatFileBase* OatFileBase::OpenOatFile(const std::string& elf_filename,
|
|
const std::string& location,
|
|
uint8_t* requested_base,
|
|
uint8_t* oat_file_begin,
|
|
bool writable,
|
|
bool executable,
|
|
bool low_4gb,
|
|
const char* abs_dex_location,
|
|
std::string* error_msg) {
|
|
std::unique_ptr<OatFileBase> ret(new kOatFileBaseSubType(location, executable));
|
|
|
|
ret->PreLoad();
|
|
|
|
if (!ret->Load(elf_filename,
|
|
oat_file_begin,
|
|
writable,
|
|
executable,
|
|
low_4gb,
|
|
error_msg)) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!ret->ComputeFields(requested_base, elf_filename, error_msg)) {
|
|
return nullptr;
|
|
}
|
|
|
|
ret->PreSetup(elf_filename);
|
|
|
|
if (!ret->Setup(abs_dex_location, error_msg)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return ret.release();
|
|
}
|
|
|
|
bool OatFileBase::ComputeFields(uint8_t* requested_base,
|
|
const std::string& file_path,
|
|
std::string* error_msg) {
|
|
std::string symbol_error_msg;
|
|
begin_ = FindDynamicSymbolAddress("oatdata", &symbol_error_msg);
|
|
if (begin_ == nullptr) {
|
|
*error_msg = StringPrintf("Failed to find oatdata symbol in '%s' %s",
|
|
file_path.c_str(),
|
|
symbol_error_msg.c_str());
|
|
return false;
|
|
}
|
|
if (requested_base != nullptr && begin_ != requested_base) {
|
|
// Host can fail this check. Do not dump there to avoid polluting the output.
|
|
if (kIsTargetBuild && (kIsDebugBuild || VLOG_IS_ON(oat))) {
|
|
PrintFileToLog("/proc/self/maps", LogSeverity::WARNING);
|
|
}
|
|
*error_msg = StringPrintf("Failed to find oatdata symbol at expected address: "
|
|
"oatdata=%p != expected=%p. See process maps in the log.",
|
|
begin_, requested_base);
|
|
return false;
|
|
}
|
|
end_ = FindDynamicSymbolAddress("oatlastword", &symbol_error_msg);
|
|
if (end_ == nullptr) {
|
|
*error_msg = StringPrintf("Failed to find oatlastword symbol in '%s' %s",
|
|
file_path.c_str(),
|
|
symbol_error_msg.c_str());
|
|
return false;
|
|
}
|
|
// Readjust to be non-inclusive upper bound.
|
|
end_ += sizeof(uint32_t);
|
|
|
|
bss_begin_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbss", &symbol_error_msg));
|
|
if (bss_begin_ == nullptr) {
|
|
// No .bss section.
|
|
bss_end_ = nullptr;
|
|
} else {
|
|
bss_end_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbsslastword", &symbol_error_msg));
|
|
if (bss_end_ == nullptr) {
|
|
*error_msg = StringPrintf("Failed to find oatbasslastword symbol in '%s'", file_path.c_str());
|
|
return false;
|
|
}
|
|
// Readjust to be non-inclusive upper bound.
|
|
bss_end_ += sizeof(uint32_t);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Read an unaligned entry from the OatDexFile data in OatFile and advance the read
|
|
// position by the number of bytes read, i.e. sizeof(T).
|
|
// Return true on success, false if the read would go beyond the end of the OatFile.
|
|
template <typename T>
|
|
inline static bool ReadOatDexFileData(const OatFile& oat_file,
|
|
/*inout*/const uint8_t** oat,
|
|
/*out*/T* value) {
|
|
DCHECK(oat != nullptr);
|
|
DCHECK(value != nullptr);
|
|
DCHECK_LE(*oat, oat_file.End());
|
|
if (UNLIKELY(static_cast<size_t>(oat_file.End() - *oat) < sizeof(T))) {
|
|
return false;
|
|
}
|
|
static_assert(std::is_trivial<T>::value, "T must be a trivial type");
|
|
typedef __attribute__((__aligned__(1))) T unaligned_type;
|
|
*value = *reinterpret_cast<const unaligned_type*>(*oat);
|
|
*oat += sizeof(T);
|
|
return true;
|
|
}
|
|
|
|
bool OatFileBase::Setup(const char* abs_dex_location, std::string* error_msg) {
|
|
if (!GetOatHeader().IsValid()) {
|
|
std::string cause = GetOatHeader().GetValidationErrorMessage();
|
|
*error_msg = StringPrintf("Invalid oat header for '%s': %s",
|
|
GetLocation().c_str(),
|
|
cause.c_str());
|
|
return false;
|
|
}
|
|
const uint8_t* oat = Begin();
|
|
oat += sizeof(OatHeader);
|
|
if (oat > End()) {
|
|
*error_msg = StringPrintf("In oat file '%s' found truncated OatHeader", GetLocation().c_str());
|
|
return false;
|
|
}
|
|
|
|
oat += GetOatHeader().GetKeyValueStoreSize();
|
|
if (oat > End()) {
|
|
*error_msg = StringPrintf("In oat file '%s' found truncated variable-size data: "
|
|
"%p + %zu + %u <= %p",
|
|
GetLocation().c_str(),
|
|
Begin(),
|
|
sizeof(OatHeader),
|
|
GetOatHeader().GetKeyValueStoreSize(),
|
|
End());
|
|
return false;
|
|
}
|
|
|
|
size_t pointer_size = GetInstructionSetPointerSize(GetOatHeader().GetInstructionSet());
|
|
uint8_t* dex_cache_arrays = bss_begin_;
|
|
uint32_t dex_file_count = GetOatHeader().GetDexFileCount();
|
|
oat_dex_files_storage_.reserve(dex_file_count);
|
|
for (size_t i = 0; i < dex_file_count; i++) {
|
|
uint32_t dex_file_location_size;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_location_size))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu truncated after dex file "
|
|
"location size",
|
|
GetLocation().c_str(),
|
|
i);
|
|
return false;
|
|
}
|
|
if (UNLIKELY(dex_file_location_size == 0U)) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with empty location name",
|
|
GetLocation().c_str(),
|
|
i);
|
|
return false;
|
|
}
|
|
if (UNLIKELY(static_cast<size_t>(End() - oat) < dex_file_location_size)) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with truncated dex file "
|
|
"location",
|
|
GetLocation().c_str(),
|
|
i);
|
|
return false;
|
|
}
|
|
const char* dex_file_location_data = reinterpret_cast<const char*>(oat);
|
|
oat += dex_file_location_size;
|
|
|
|
std::string dex_file_location = ResolveRelativeEncodedDexLocation(
|
|
abs_dex_location,
|
|
std::string(dex_file_location_data, dex_file_location_size));
|
|
|
|
uint32_t dex_file_checksum;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_checksum))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated after "
|
|
"dex file checksum",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
|
|
uint32_t dex_file_offset;
|
|
if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_offset))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated "
|
|
"after dex file offsets",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
if (UNLIKELY(dex_file_offset == 0U)) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with zero dex "
|
|
"file offset",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str());
|
|
return false;
|
|
}
|
|
if (UNLIKELY(dex_file_offset > Size())) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file "
|
|
"offset %u > %zu",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
dex_file_offset,
|
|
Size());
|
|
return false;
|
|
}
|
|
if (UNLIKELY(Size() - dex_file_offset < sizeof(DexFile::Header))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file "
|
|
"offset %u of %zu but the size of dex file header is %zu",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
dex_file_offset,
|
|
Size(),
|
|
sizeof(DexFile::Header));
|
|
return false;
|
|
}
|
|
|
|
const uint8_t* dex_file_pointer = Begin() + dex_file_offset;
|
|
if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) {
|
|
*error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with invalid "
|
|
"dex file magic '%s'",
|
|
GetLocation().c_str(),
|
|
i,
|
|
dex_file_location.c_str(),
|
|
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 (Size() - 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_,
|
|
Size());
|
|
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;
|
|
}
|
|
|
|
uint8_t* current_dex_cache_arrays = nullptr;
|
|
if (dex_cache_arrays != nullptr) {
|
|
DexCacheArraysLayout layout(pointer_size, *header);
|
|
if (layout.Size() != 0u) {
|
|
if (static_cast<size_t>(bss_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>(bss_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,
|
|
class_offsets_pointer,
|
|
current_dex_cache_arrays);
|
|
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 != bss_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 nothing else.
|
|
*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 __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, "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
|
|
}
|
|
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,
|
|
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,
|
|
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);
|
|
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,
|
|
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, abs_dex_location, error_msg)
|
|
? oat_file.release()
|
|
: nullptr;
|
|
}
|
|
|
|
OatFile* OatFile::Open(const std::string& filename,
|
|
const std::string& 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 " + location);
|
|
CHECK(!filename.empty()) << location;
|
|
CheckLocation(location);
|
|
|
|
// Check that the file even exists, fast-fail.
|
|
if (!OS::FileExists(filename.c_str())) {
|
|
*error_msg = StringPrintf("File %s does not exist.", 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>(filename,
|
|
location,
|
|
requested_base,
|
|
oat_file_begin,
|
|
false,
|
|
executable,
|
|
low_4gb,
|
|
abs_dex_location,
|
|
error_msg);
|
|
if (with_dlopen != nullptr) {
|
|
return with_dlopen;
|
|
}
|
|
if (kPrintDlOpenErrorMessage) {
|
|
LOG(ERROR) << "Failed to dlopen: " << 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>(filename,
|
|
location,
|
|
requested_base,
|
|
oat_file_begin,
|
|
false,
|
|
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),
|
|
begin_(nullptr),
|
|
end_(nullptr),
|
|
bss_begin_(nullptr),
|
|
bss_end_(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 OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location,
|
|
const uint32_t* dex_location_checksum,
|
|
bool warn_if_not_found) 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 &&
|
|
(dex_location_checksum == nullptr ||
|
|
oat_dex_file->GetDexFileLocationChecksum() == *dex_location_checksum)) {
|
|
return oat_dex_file;
|
|
}
|
|
|
|
if (warn_if_not_found) {
|
|
std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
|
|
std::string checksum("<unspecified>");
|
|
if (dex_location_checksum != nullptr) {
|
|
checksum = StringPrintf("0x%08x", *dex_location_checksum);
|
|
}
|
|
LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_location
|
|
<< " ( canonical path " << dex_canonical_location << ")"
|
|
<< " with checksum " << checksum << " in OatFile " << GetLocation();
|
|
if (kIsDebugBuild) {
|
|
for (const OatDexFile* odf : oat_dex_files_storage_) {
|
|
LOG(WARNING) << "OatFile " << GetLocation()
|
|
<< " contains OatDexFile " << odf->GetDexFileLocation()
|
|
<< " (canonical path " << odf->GetCanonicalDexFileLocation() << ")"
|
|
<< " with checksum 0x" << std::hex << odf->GetDexFileLocationChecksum();
|
|
}
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
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 uint32_t* oat_class_offsets_pointer,
|
|
uint8_t* dex_cache_arrays)
|
|
: 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),
|
|
oat_class_offsets_pointer_(oat_class_offsets_pointer),
|
|
dex_cache_arrays_(dex_cache_arrays) {}
|
|
|
|
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__);
|
|
return DexFile::Open(dex_file_pointer_,
|
|
FileSize(),
|
|
dex_file_location_,
|
|
dex_file_location_checksum_,
|
|
this,
|
|
false /* verify */,
|
|
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));
|
|
}
|
|
|
|
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::HasPatchInfo() const {
|
|
return GetOatHeader().HasPatchInfo();
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
static constexpr char kDexClassPathEncodingSeparator = '*';
|
|
|
|
std::string OatFile::EncodeDexFileDependencies(const std::vector<const DexFile*>& dex_files) {
|
|
std::ostringstream out;
|
|
|
|
for (const DexFile* dex_file : dex_files) {
|
|
out << dex_file->GetLocation().c_str();
|
|
out << kDexClassPathEncodingSeparator;
|
|
out << dex_file->GetLocationChecksum();
|
|
out << kDexClassPathEncodingSeparator;
|
|
}
|
|
|
|
return out.str();
|
|
}
|
|
|
|
bool OatFile::CheckStaticDexFileDependencies(const char* dex_dependencies, std::string* msg) {
|
|
if (dex_dependencies == nullptr || dex_dependencies[0] == 0) {
|
|
// No dependencies.
|
|
return true;
|
|
}
|
|
|
|
// Assumption: this is not performance-critical. So it's OK to do this with a std::string and
|
|
// Split() instead of manual parsing of the combined char*.
|
|
std::vector<std::string> split;
|
|
Split(dex_dependencies, kDexClassPathEncodingSeparator, &split);
|
|
if (split.size() % 2 != 0) {
|
|
// Expected pairs of location and checksum.
|
|
*msg = StringPrintf("Odd number of elements in dependency list %s", dex_dependencies);
|
|
return false;
|
|
}
|
|
|
|
for (auto it = split.begin(), end = split.end(); it != end; it += 2) {
|
|
std::string& location = *it;
|
|
std::string& checksum = *(it + 1);
|
|
int64_t converted = strtoll(checksum.c_str(), nullptr, 10);
|
|
if (converted == 0) {
|
|
// Conversion error.
|
|
*msg = StringPrintf("Conversion error for %s", checksum.c_str());
|
|
return false;
|
|
}
|
|
|
|
uint32_t dex_checksum;
|
|
std::string error_msg;
|
|
if (DexFile::GetChecksum(DexFile::GetDexCanonicalLocation(location.c_str()).c_str(),
|
|
&dex_checksum,
|
|
&error_msg)) {
|
|
if (converted != dex_checksum) {
|
|
*msg = StringPrintf("Checksums don't match for %s: %" PRId64 " vs %u",
|
|
location.c_str(), converted, dex_checksum);
|
|
return false;
|
|
}
|
|
} else {
|
|
// Problem retrieving checksum.
|
|
// TODO: odex files?
|
|
*msg = StringPrintf("Could not retrieve checksum for %s: %s", location.c_str(),
|
|
error_msg.c_str());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool OatFile::GetDexLocationsFromDependencies(const char* dex_dependencies,
|
|
std::vector<std::string>* locations) {
|
|
DCHECK(locations != nullptr);
|
|
if (dex_dependencies == nullptr || dex_dependencies[0] == 0) {
|
|
return true;
|
|
}
|
|
|
|
// Assumption: this is not performance-critical. So it's OK to do this with a std::string and
|
|
// Split() instead of manual parsing of the combined char*.
|
|
std::vector<std::string> split;
|
|
Split(dex_dependencies, kDexClassPathEncodingSeparator, &split);
|
|
if (split.size() % 2 != 0) {
|
|
// Expected pairs of location and checksum.
|
|
return false;
|
|
}
|
|
|
|
for (auto it = split.begin(), end = split.end(); it != end; it += 2) {
|
|
locations->push_back(*it);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace art
|