Revert^2 "Use libdexfile external API in libunwindstack."
This reverts commit cacf5bf6bca7e9806739a27589d8b6101c567c32.
Reason for revert: Re-apply with proper fix for VNDK visibility on marlin and sailfish.
Test: Manual repro of http://b/121110092#comment1 on reported branch
Test: atest CtsRenderscriptTestCases
Test: mmma system/core/{libunwindstack,libbacktrace}, run host gtests
Test: Make image, flash, and reboot device.
Test: Forrest cts/art/gce-all: https://android-build.googleplex.com/builds/forrest/run/L00300000240828791
Test: Forrest cts/bionic/gce-all: https://android-build.googleplex.com/builds/forrest/run/L05600000240682947 (shows 27/2958 failed, but it doesn't pass on Blackbox either: http://screen/xbjioEf6UgR)
Test: Forrest cts/renderscript/gce-all: https://android-build.googleplex.com/builds/forrest/run/L66200000240680523
Bug: 119632407
Change-Id: I601aa97eac8127e30d753405f8bc1fc4ae7f849f
diff --git a/libunwindstack/DexFile.cpp b/libunwindstack/DexFile.cpp
index 8ec560c..9b0b232 100644
--- a/libunwindstack/DexFile.cpp
+++ b/libunwindstack/DexFile.cpp
@@ -23,13 +23,7 @@
#include <memory>
#include <android-base/unique_fd.h>
-
-#include <dex/class_accessor-inl.h>
-#include <dex/code_item_accessors-inl.h>
-#include <dex/compact_dex_file.h>
-#include <dex/dex_file-inl.h>
-#include <dex/dex_file_loader.h>
-#include <dex/standard_dex_file.h>
+#include <art_api/ext_dex_file.h>
#include <unwindstack/MapInfo.h>
#include <unwindstack/Memory.h>
@@ -38,169 +32,71 @@
namespace unwindstack {
-DexFile* DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory, MapInfo* info) {
+std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
+ MapInfo* info) {
if (!info->name.empty()) {
- std::unique_ptr<DexFileFromFile> dex_file(new DexFileFromFile);
- if (dex_file->Open(dex_file_offset_in_memory - info->start + info->offset, info->name)) {
- return dex_file.release();
+ std::unique_ptr<DexFile> dex_file =
+ DexFileFromFile::Create(dex_file_offset_in_memory - info->start + info->offset, info->name);
+ if (dex_file) {
+ return dex_file;
}
}
-
- std::unique_ptr<DexFileFromMemory> dex_file(new DexFileFromMemory);
- if (dex_file->Open(dex_file_offset_in_memory, memory)) {
- return dex_file.release();
- }
- return nullptr;
-}
-
-DexFileFromFile::~DexFileFromFile() {
- if (size_ != 0) {
- munmap(mapped_memory_, size_);
- }
+ return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name);
}
bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name,
uint64_t* method_offset) {
- if (dex_file_ == nullptr) {
+ art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset);
+ if (method_info.offset == 0) {
return false;
}
-
- if (!dex_file_->IsInDataSection(dex_file_->Begin() + dex_offset)) {
- return false; // The DEX offset is not within the bytecode of this dex file.
- }
-
- if (dex_file_->IsCompactDexFile()) {
- // The data section of compact dex files might be shared.
- // Check the subrange unique to this compact dex.
- const auto& cdex_header = dex_file_->AsCompactDexFile()->GetHeader();
- uint32_t begin = cdex_header.data_off_ + cdex_header.OwnedDataBegin();
- uint32_t end = cdex_header.data_off_ + cdex_header.OwnedDataEnd();
- if (dex_offset < begin || dex_offset >= end) {
- return false; // The DEX offset is not within the bytecode of this dex file.
- }
- }
-
- // The method data is cached in a std::map indexed by method end offset and
- // contains the start offset and the method member index.
- // Only cache the method data as it is searched. Do not read the entire
- // set of method data into the cache at once.
- // This is done because many unwinds only find a single frame with dex file
- // info, so reading the entire method data is wasteful. However, still cache
- // the data so that anything doing multiple unwinds will have this data
- // cached for future use.
-
- // First look in the method cache.
- auto entry = method_cache_.upper_bound(dex_offset);
- if (entry != method_cache_.end() && dex_offset >= entry->second.first) {
- *method_name = dex_file_->PrettyMethod(entry->second.second, false);
- *method_offset = dex_offset - entry->second.first;
- return true;
- }
-
- // Check the methods we haven't cached.
- for (; class_def_index_ < dex_file_->NumClassDefs(); class_def_index_++) {
- art::ClassAccessor accessor(*dex_file_, dex_file_->GetClassDef(class_def_index_));
-
- for (const art::ClassAccessor::Method& method : accessor.GetMethods()) {
- art::CodeItemInstructionAccessor code = method.GetInstructions();
- if (!code.HasCodeItem()) {
- continue;
- }
- uint32_t offset = reinterpret_cast<const uint8_t*>(code.Insns()) - dex_file_->Begin();
- uint32_t offset_end = offset + code.InsnsSizeInBytes();
- uint32_t member_index = method.GetIndex();
- method_cache_[offset_end] = std::make_pair(offset, member_index);
- if (offset <= dex_offset && dex_offset < offset_end) {
- *method_name = dex_file_->PrettyMethod(member_index, false);
- *method_offset = dex_offset - offset;
- return true;
- }
- }
- }
- return false;
+ *method_name = method_info.name;
+ *method_offset = dex_offset - method_info.offset;
+ return true;
}
-bool DexFileFromFile::Open(uint64_t dex_file_offset_in_file, const std::string& file) {
+std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
+ const std::string& file) {
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
if (fd == -1) {
- return false;
- }
- struct stat buf;
- if (fstat(fd, &buf) == -1) {
- return false;
- }
- uint64_t length;
- if (buf.st_size < 0 ||
- __builtin_add_overflow(dex_file_offset_in_file, sizeof(art::DexFile::Header), &length) ||
- static_cast<uint64_t>(buf.st_size) < length) {
- return false;
+ return nullptr;
}
- mapped_memory_ = mmap(nullptr, buf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- if (mapped_memory_ == MAP_FAILED) {
- return false;
- }
- size_ = buf.st_size;
-
- uint8_t* memory = reinterpret_cast<uint8_t*>(mapped_memory_);
-
- art::DexFile::Header* header =
- reinterpret_cast<art::DexFile::Header*>(&memory[dex_file_offset_in_file]);
- if (!art::StandardDexFile::IsMagicValid(header->magic_) &&
- !art::CompactDexFile::IsMagicValid(header->magic_)) {
- return false;
- }
-
- if (__builtin_add_overflow(dex_file_offset_in_file, header->file_size_, &length) ||
- static_cast<uint64_t>(buf.st_size) < length) {
- return false;
- }
-
- art::DexFileLoader loader;
std::string error_msg;
- auto dex = loader.Open(&memory[dex_file_offset_in_file], header->file_size_, "", 0, nullptr,
- false, false, &error_msg);
- dex_file_.reset(dex.release());
- return dex_file_ != nullptr;
+ std::unique_ptr<art_api::dex::DexFile> art_dex_file =
+ OpenFromFd(fd, dex_file_offset_in_file, file, &error_msg);
+ if (art_dex_file == nullptr) {
+ return nullptr;
+ }
+
+ return std::unique_ptr<DexFileFromFile>(new DexFileFromFile(std::move(*art_dex_file.release())));
}
-bool DexFileFromMemory::Open(uint64_t dex_file_offset_in_memory, Memory* memory) {
- memory_.resize(sizeof(art::DexFile::Header));
- if (!memory->ReadFully(dex_file_offset_in_memory, memory_.data(), memory_.size())) {
- return false;
- }
+std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
+ Memory* memory,
+ const std::string& name) {
+ std::vector<uint8_t> backing_memory;
- art::DexFile::Header* header = reinterpret_cast<art::DexFile::Header*>(memory_.data());
- uint32_t file_size = header->file_size_;
- if (art::CompactDexFile::IsMagicValid(header->magic_)) {
- // Compact dex file store data section separately so that it can be shared.
- // Therefore we need to extend the read memory range to include it.
- // TODO: This might be wasteful as we might read data in between as well.
- // In practice, this should be fine, as such sharing only happens on disk.
- uint32_t computed_file_size;
- if (__builtin_add_overflow(header->data_off_, header->data_size_, &computed_file_size)) {
- return false;
+ for (size_t size = 0;;) {
+ std::string error_msg;
+ std::unique_ptr<art_api::dex::DexFile> art_dex_file =
+ OpenFromMemory(backing_memory.data(), &size, name, &error_msg);
+
+ if (art_dex_file != nullptr) {
+ return std::unique_ptr<DexFileFromMemory>(
+ new DexFileFromMemory(std::move(*art_dex_file.release()), std::move(backing_memory)));
}
- if (computed_file_size > file_size) {
- file_size = computed_file_size;
+
+ if (!error_msg.empty()) {
+ return nullptr;
}
- } else if (!art::StandardDexFile::IsMagicValid(header->magic_)) {
- return false;
+
+ backing_memory.resize(size);
+ if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(),
+ backing_memory.size())) {
+ return nullptr;
+ }
}
-
- memory_.resize(file_size);
- if (!memory->ReadFully(dex_file_offset_in_memory, memory_.data(), memory_.size())) {
- return false;
- }
-
- header = reinterpret_cast<art::DexFile::Header*>(memory_.data());
-
- art::DexFileLoader loader;
- std::string error_msg;
- auto dex =
- loader.Open(memory_.data(), header->file_size_, "", 0, nullptr, false, false, &error_msg);
- dex_file_.reset(dex.release());
- return dex_file_ != nullptr;
}
} // namespace unwindstack