Revert "Use libdexfile external API in libunwindstack."
This reverts commit 444e23d2fc6d7c6f799ff9e2f69c1a82d2960c5b.
The rest of the topic doesn't need to be reverted.
Reason for revert: Breaks renderscript on marlin and sailfish.
Test: Manual repro of http://b/121110092#comment1 on reported branch
Test: "atest CtsRenderscriptTestCases" on that branch
Test: mmma system/core/{libunwindstack,libbacktrace}, run host gtests
Test: Make image, flash, and reboot device.
Bug: 121110092, 119632407
Change-Id: If1976b19ce386c95bc5bd4fd6d523745c167de18
diff --git a/libunwindstack/DexFile.cpp b/libunwindstack/DexFile.cpp
index 9b0b232..8ec560c 100644
--- a/libunwindstack/DexFile.cpp
+++ b/libunwindstack/DexFile.cpp
@@ -23,7 +23,13 @@
#include <memory>
#include <android-base/unique_fd.h>
-#include <art_api/ext_dex_file.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 <unwindstack/MapInfo.h>
#include <unwindstack/Memory.h>
@@ -32,71 +38,169 @@
namespace unwindstack {
-std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
- MapInfo* info) {
+DexFile* DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory, MapInfo* info) {
if (!info->name.empty()) {
- 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<DexFileFromFile> dex_file(new DexFileFromFile);
+ if (dex_file->Open(dex_file_offset_in_memory - info->start + info->offset, info->name)) {
+ return dex_file.release();
}
}
- return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name);
+
+ 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_);
+ }
}
bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name,
uint64_t* method_offset) {
- art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset);
- if (method_info.offset == 0) {
+ if (dex_file_ == nullptr) {
return false;
}
- *method_name = method_info.name;
- *method_offset = dex_offset - method_info.offset;
- return true;
+
+ 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;
}
-std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
- const std::string& file) {
+bool DexFileFromFile::Open(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 nullptr;
+ 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;
}
+ 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;
- 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())));
+ 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<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
- Memory* memory,
- const std::string& name) {
- std::vector<uint8_t> backing_memory;
-
- 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 (!error_msg.empty()) {
- return nullptr;
- }
-
- backing_memory.resize(size);
- if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(),
- backing_memory.size())) {
- return nullptr;
- }
+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;
}
+
+ 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;
+ }
+ if (computed_file_size > file_size) {
+ file_size = computed_file_size;
+ }
+ } else if (!art::StandardDexFile::IsMagicValid(header->magic_)) {
+ return false;
+ }
+
+ 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