Improve dex location canonicalization-related performance.
Eagerly add canonical dex file locations to the OatFile's
primary lookup map in Setup(). This moves the boot.oat work
from every app startup to the zygote initialization. Since
we always ended up initializing the canonical location map
anyway due to the way that we're loading dex files, the lazy
initialization didn't save anything.
Clean up dex file name canonicalization to make sure we
free() the memory returned by realpath() rather than using
std::unique_ptr<> with the default deleter.
Avoid some unnecessary duplicate OatDexFile lookups.
Bug: 16828525
Bug: 17346103
(cherry picked from commit aa4497db59f1eeec954f2ba5da6d458fcdf9b3a4)
Change-Id: Icc4b14ebe903282ca91ce24e33a6d7c75dff991c
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 26f32f9..149b3e8 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -676,18 +676,18 @@
return *oat_file;
}
-const OatFile* ClassLinker::FindOpenedOatFileForDexFile(const DexFile& dex_file) {
+const OatFile::OatDexFile* ClassLinker::FindOpenedOatDexFileForDexFile(const DexFile& dex_file) {
const char* dex_location = dex_file.GetLocation().c_str();
uint32_t dex_location_checksum = dex_file.GetLocationChecksum();
- return FindOpenedOatFile(nullptr, dex_location, &dex_location_checksum);
+ return FindOpenedOatDexFile(nullptr, dex_location, &dex_location_checksum);
}
-const OatFile* ClassLinker::FindOpenedOatFile(const char* oat_location, const char* dex_location,
- const uint32_t* const dex_location_checksum) {
+const OatFile::OatDexFile* ClassLinker::FindOpenedOatDexFile(const char* oat_location,
+ const char* dex_location,
+ const uint32_t* dex_location_checksum) {
ReaderMutexLock mu(Thread::Current(), dex_lock_);
- for (size_t i = 0; i < oat_files_.size(); i++) {
- const OatFile* oat_file = oat_files_[i];
- DCHECK(oat_file != NULL);
+ for (const OatFile* oat_file : oat_files_) {
+ DCHECK(oat_file != nullptr);
if (oat_location != nullptr) {
if (oat_file->GetLocation() != oat_location) {
@@ -698,11 +698,11 @@
const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location,
dex_location_checksum,
false);
- if (oat_dex_file != NULL) {
- return oat_file;
+ if (oat_dex_file != nullptr) {
+ return oat_dex_file;
}
}
- return NULL;
+ return nullptr;
}
@@ -824,8 +824,10 @@
bool needs_registering = false;
- std::unique_ptr<const OatFile> open_oat_file(FindOpenedOatFile(oat_location, dex_location,
- dex_location_checksum_pointer));
+ const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFile(oat_location, dex_location,
+ dex_location_checksum_pointer);
+ std::unique_ptr<const OatFile> open_oat_file(
+ oat_dex_file != nullptr ? oat_dex_file->GetOatFile() : nullptr);
// 2) If we do not have an open one, maybe there's one on disk already.
@@ -946,7 +948,8 @@
}
// Try to load again, but stronger checks.
- success = LoadMultiDexFilesFromOatFile(open_oat_file.get(), dex_location, dex_location_checksum_pointer,
+ success = LoadMultiDexFilesFromOatFile(open_oat_file.get(), dex_location,
+ dex_location_checksum_pointer,
true, error_msgs, dex_files);
if (success) {
RegisterOatFile(open_oat_file.release());
@@ -1121,12 +1124,11 @@
if (oat_dex_file == NULL) {
*error_msg = StringPrintf("oat file '%s' does not contain contents for '%s' with checksum 0x%x",
oat_file->GetLocation().c_str(), dex_location, dex_location_checksum);
- std::vector<const OatFile::OatDexFile*> oat_dex_files = oat_file->GetOatDexFiles();
- for (size_t i = 0; i < oat_dex_files.size(); i++) {
- const OatFile::OatDexFile* oat_dex_file = oat_dex_files[i];
- *error_msg += StringPrintf("\noat file '%s' contains contents for '%s'",
+ for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) {
+ *error_msg += StringPrintf("\noat file '%s' contains contents for '%s' with checksum 0x%x",
oat_file->GetLocation().c_str(),
- oat_dex_file->GetDexFileLocation().c_str());
+ oat_dex_file->GetDexFileLocation().c_str(),
+ oat_dex_file->GetDexFileLocationChecksum());
}
return false;
}
@@ -1174,7 +1176,7 @@
const OatFile* ClassLinker::FindOatFileContainingDexFileFromDexLocation(
const char* dex_location,
- const uint32_t* const dex_location_checksum,
+ const uint32_t* dex_location_checksum,
InstructionSet isa,
std::vector<std::string>* error_msgs,
bool* obsolete_file_cleanup_failed) {
@@ -2311,14 +2313,10 @@
OatFile::OatClass* oat_class) {
DCHECK(oat_class != nullptr);
DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16);
- const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
- if (oat_file == nullptr) {
+ const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFileForDexFile(dex_file);
+ if (oat_dex_file == nullptr) {
return false;
}
- uint dex_location_checksum = dex_file.GetLocationChecksum();
- const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation().c_str(),
- &dex_location_checksum);
- CHECK(oat_dex_file != NULL) << dex_file.GetLocation();
*oat_class = oat_dex_file->GetOatClass(class_def_idx);
return true;
}
@@ -3562,17 +3560,13 @@
}
}
- const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
+ const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFileForDexFile(dex_file);
// Make this work with gtests, which do not set up the image properly.
// TODO: we should clean up gtests to set up the image path properly.
- if (Runtime::Current()->IsCompiler() || (oat_file == NULL)) {
+ if (Runtime::Current()->IsCompiler() || (oat_dex_file == nullptr)) {
return false;
}
- CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
- uint dex_location_checksum = dex_file.GetLocationChecksum();
- const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation().c_str(),
- &dex_location_checksum);
CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
uint16_t class_def_index = klass->GetDexClassDefIndex();
oat_file_class_status = oat_dex_file->GetOatClass(class_def_index).GetStatus();