| /* |
| * 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 "compiler.h" |
| |
| #include <vector> |
| |
| #include <dlfcn.h> |
| #include <sys/mman.h> |
| #include <unistd.h> |
| |
| #include "assembler.h" |
| #include "class_linker.h" |
| #include "class_loader.h" |
| #include "dex_cache.h" |
| #include "dex_verifier.h" |
| #include "jni_internal.h" |
| #include "oat_compilation_unit.h" |
| #include "oat_file.h" |
| #include "object_utils.h" |
| #include "runtime.h" |
| #include "space.h" |
| #include "stl_util.h" |
| #include "timing_logger.h" |
| |
| #if defined(__APPLE__) |
| #include <mach-o/dyld.h> |
| #endif |
| |
| namespace art { |
| |
| namespace arm { |
| ByteArray* CreateAbstractMethodErrorStub(); |
| ByteArray* ArmCreateResolutionTrampoline(Runtime::TrampolineType type); |
| ByteArray* CreateJniDlsymLookupStub(); |
| } |
| namespace x86 { |
| ByteArray* CreateAbstractMethodErrorStub(); |
| ByteArray* X86CreateResolutionTrampoline(Runtime::TrampolineType type); |
| ByteArray* CreateJniDlsymLookupStub(); |
| } |
| |
| static double Percentage(size_t x, size_t y) { |
| return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); |
| } |
| |
| static void DumpStat(size_t x, size_t y, const char* str) { |
| if (x == 0 && y == 0) { |
| return; |
| } |
| LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; |
| } |
| |
| class AOTCompilationStats { |
| public: |
| AOTCompilationStats() : stats_lock_("AOT compilation statistics lock"), |
| types_in_dex_cache_(0), types_not_in_dex_cache_(0), |
| strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), |
| resolved_types_(0), unresolved_types_(0), |
| resolved_instance_fields_(0), unresolved_instance_fields_(0), |
| resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0) { |
| for (size_t i = 0; i <= kMaxInvokeType; i++) { |
| resolved_methods_[i] = 0; |
| unresolved_methods_[i] = 0; |
| virtual_made_direct_[i] = 0; |
| direct_calls_to_boot_[i] = 0; |
| direct_methods_to_boot_[i] = 0; |
| } |
| } |
| |
| void Dump() { |
| DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); |
| DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); |
| DumpStat(resolved_types_, unresolved_types_, "types resolved"); |
| DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); |
| DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, |
| "static fields resolved"); |
| DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, |
| "static fields local to a class"); |
| |
| for (size_t i = 0; i <= kMaxInvokeType; i++) { |
| std::ostringstream oss; |
| oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; |
| DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); |
| if (virtual_made_direct_[i] > 0) { |
| std::ostringstream oss2; |
| oss2 << static_cast<InvokeType>(i) << " methods made direct"; |
| DumpStat(virtual_made_direct_[i], |
| resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], |
| oss2.str().c_str()); |
| } |
| if (direct_calls_to_boot_[i] > 0) { |
| std::ostringstream oss2; |
| oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; |
| DumpStat(direct_calls_to_boot_[i], |
| resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], |
| oss2.str().c_str()); |
| } |
| if (direct_methods_to_boot_[i] > 0) { |
| std::ostringstream oss2; |
| oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; |
| DumpStat(direct_methods_to_boot_[i], |
| resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], |
| oss2.str().c_str()); |
| } |
| } |
| } |
| |
| // Allow lossy statistics in non-debug builds |
| #ifndef NDEBUG |
| #define STATS_LOCK() MutexLock mu(stats_lock_) |
| #else |
| #define STATS_LOCK() |
| #endif |
| |
| void TypeInDexCache() { |
| STATS_LOCK(); |
| types_in_dex_cache_++; |
| } |
| |
| void TypeNotInDexCache() { |
| STATS_LOCK(); |
| types_not_in_dex_cache_++; |
| } |
| |
| void StringInDexCache() { |
| STATS_LOCK(); |
| strings_in_dex_cache_++; |
| } |
| |
| void StringNotInDexCache() { |
| STATS_LOCK(); |
| strings_not_in_dex_cache_++; |
| } |
| |
| void TypeDoesntNeedAccessCheck() { |
| STATS_LOCK(); |
| resolved_types_++; |
| } |
| |
| void TypeNeedsAccessCheck() { |
| STATS_LOCK(); |
| unresolved_types_++; |
| } |
| |
| void ResolvedInstanceField() { |
| STATS_LOCK(); |
| resolved_instance_fields_++; |
| } |
| |
| void UnresolvedInstanceField() { |
| STATS_LOCK(); |
| unresolved_instance_fields_++; |
| } |
| |
| void ResolvedLocalStaticField() { |
| STATS_LOCK(); |
| resolved_local_static_fields_++; |
| } |
| |
| void ResolvedStaticField() { |
| STATS_LOCK(); |
| resolved_static_fields_++; |
| } |
| |
| void UnresolvedStaticField() { |
| STATS_LOCK(); |
| unresolved_static_fields_++; |
| } |
| |
| void ResolvedMethod(InvokeType type) { |
| DCHECK_LE(type, kMaxInvokeType); |
| STATS_LOCK(); |
| resolved_methods_[type]++; |
| } |
| |
| void UnresolvedMethod(InvokeType type) { |
| DCHECK_LE(type, kMaxInvokeType); |
| STATS_LOCK(); |
| unresolved_methods_[type]++; |
| } |
| |
| void VirtualMadeDirect(InvokeType type) { |
| DCHECK_LE(type, kMaxInvokeType); |
| STATS_LOCK(); |
| virtual_made_direct_[type]++; |
| } |
| |
| void DirectCallsToBoot(InvokeType type) { |
| DCHECK_LE(type, kMaxInvokeType); |
| STATS_LOCK(); |
| direct_calls_to_boot_[type]++; |
| } |
| |
| void DirectMethodsToBoot(InvokeType type) { |
| DCHECK_LE(type, kMaxInvokeType); |
| STATS_LOCK(); |
| direct_methods_to_boot_[type]++; |
| } |
| |
| private: |
| Mutex stats_lock_; |
| |
| size_t types_in_dex_cache_; |
| size_t types_not_in_dex_cache_; |
| |
| size_t strings_in_dex_cache_; |
| size_t strings_not_in_dex_cache_; |
| |
| size_t resolved_types_; |
| size_t unresolved_types_; |
| |
| size_t resolved_instance_fields_; |
| size_t unresolved_instance_fields_; |
| |
| size_t resolved_local_static_fields_; |
| size_t resolved_static_fields_; |
| size_t unresolved_static_fields_; |
| |
| size_t resolved_methods_[kMaxInvokeType + 1]; |
| size_t unresolved_methods_[kMaxInvokeType + 1]; |
| size_t virtual_made_direct_[kMaxInvokeType + 1]; |
| size_t direct_calls_to_boot_[kMaxInvokeType + 1]; |
| size_t direct_methods_to_boot_[kMaxInvokeType + 1]; |
| |
| DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); |
| }; |
| |
| static std::string MakeCompilerSoName(InstructionSet instruction_set) { |
| // TODO: is the ARM/Thumb2 instruction set distinction really buying us anything, |
| // or just causing hassle like this? |
| if (instruction_set == kThumb2) { |
| instruction_set = kArm; |
| } |
| |
| // Capitalize the instruction set, because that's what we do in the build system. |
| std::ostringstream instruction_set_name_os; |
| instruction_set_name_os << instruction_set; |
| std::string instruction_set_name(instruction_set_name_os.str()); |
| for (size_t i = 0; i < instruction_set_name.size(); ++i) { |
| instruction_set_name[i] = toupper(instruction_set_name[i]); |
| } |
| |
| // Bad things happen if we pull in the libartd-compiler to a libart dex2oat or vice versa, |
| // because we end up with both libart and libartd in the same address space! |
| const char* suffix = (kIsDebugBuild ? "d" : ""); |
| |
| // Work out the filename for the compiler library. |
| #if !defined(ART_USE_LLVM_COMPILER) |
| std::string library_name(StringPrintf("art%s-compiler-%s", suffix, instruction_set_name.c_str())); |
| #else |
| std::string library_name(StringPrintf("art%s-compiler-llvm", suffix)); |
| #endif |
| std::string filename(StringPrintf(OS_SHARED_LIB_FORMAT_STR, library_name.c_str())); |
| |
| #if defined(__APPLE__) |
| // On Linux, dex2oat will have been built with an RPATH of $ORIGIN/../lib, so dlopen(3) will find |
| // the .so by itself. On Mac OS, there isn't really an equivalent, so we have to manually do the |
| // same work. |
| std::vector<char> executable_path(1); |
| uint32_t executable_path_length = 0; |
| _NSGetExecutablePath(&executable_path[0], &executable_path_length); |
| while (_NSGetExecutablePath(&executable_path[0], &executable_path_length) == -1) { |
| executable_path.resize(executable_path_length); |
| } |
| |
| executable_path.resize(executable_path.size() - 1); // Strip trailing NUL. |
| std::string path(&executable_path[0]); |
| |
| // Strip the "/dex2oat". |
| size_t last_slash = path.find_last_of('/'); |
| CHECK_NE(last_slash, std::string::npos) << path; |
| path.resize(last_slash); |
| |
| // Strip the "/bin". |
| last_slash = path.find_last_of('/'); |
| path.resize(last_slash); |
| |
| filename = path + "/lib/" + filename; |
| #endif |
| return filename; |
| } |
| |
| template<typename Fn> |
| static Fn FindFunction(const std::string& compiler_so_name, void* library, const char* name) { |
| Fn fn = reinterpret_cast<Fn>(dlsym(library, name)); |
| if (fn == NULL) { |
| LOG(FATAL) << "Couldn't find \"" << name << "\" in compiler library " << compiler_so_name << ": " << dlerror(); |
| } |
| VLOG(compiler) << "Found \"" << name << "\" at " << reinterpret_cast<void*>(fn); |
| return fn; |
| } |
| |
| Compiler::Compiler(InstructionSet instruction_set, bool image, size_t thread_count, |
| bool support_debugging, const std::set<std::string>* image_classes, |
| bool dump_stats, bool dump_timings) |
| : instruction_set_(instruction_set), |
| compiled_classes_lock_("compiled classes lock"), |
| compiled_methods_lock_("compiled method lock"), |
| compiled_invoke_stubs_lock_("compiled invoke stubs lock"), |
| image_(image), |
| thread_count_(thread_count), |
| support_debugging_(support_debugging), |
| stats_(new AOTCompilationStats), |
| dump_stats_(dump_stats), |
| dump_timings_(dump_timings), |
| image_classes_(image_classes), |
| compiler_library_(NULL), |
| compiler_(NULL), |
| compiler_context_(NULL), |
| jni_compiler_(NULL), |
| create_invoke_stub_(NULL) { |
| std::string compiler_so_name(MakeCompilerSoName(instruction_set_)); |
| compiler_library_ = dlopen(compiler_so_name.c_str(), RTLD_LAZY); |
| if (compiler_library_ == NULL) { |
| LOG(FATAL) << "Couldn't find compiler library " << compiler_so_name << ": " << dlerror(); |
| } |
| VLOG(compiler) << "dlopen(\"" << compiler_so_name << "\", RTLD_LAZY) returned " << compiler_library_; |
| |
| #if defined(ART_USE_LLVM_COMPILER) |
| // Initialize compiler_context_ |
| typedef void (*InitCompilerContextFn)(Compiler&); |
| |
| InitCompilerContextFn init_compiler_context = |
| FindFunction<void (*)(Compiler&)>(compiler_so_name, |
| compiler_library_, |
| "ArtInitCompilerContext"); |
| |
| init_compiler_context(*this); |
| #endif |
| |
| compiler_ = FindFunction<CompilerFn>(compiler_so_name, compiler_library_, "ArtCompileMethod"); |
| jni_compiler_ = FindFunction<JniCompilerFn>(compiler_so_name, compiler_library_, "ArtJniCompileMethod"); |
| create_invoke_stub_ = FindFunction<CreateInvokeStubFn>(compiler_so_name, compiler_library_, "ArtCreateInvokeStub"); |
| |
| CHECK(!Runtime::Current()->IsStarted()); |
| if (!image_) { |
| CHECK(image_classes_ == NULL); |
| } |
| } |
| |
| Compiler::~Compiler() { |
| { |
| MutexLock mu(compiled_classes_lock_); |
| STLDeleteValues(&compiled_classes_); |
| } |
| { |
| MutexLock mu(compiled_methods_lock_); |
| STLDeleteValues(&compiled_methods_); |
| } |
| { |
| MutexLock mu(compiled_invoke_stubs_lock_); |
| STLDeleteValues(&compiled_invoke_stubs_); |
| } |
| { |
| MutexLock mu(compiled_methods_lock_); |
| STLDeleteElements(&code_to_patch_); |
| } |
| { |
| MutexLock mu(compiled_methods_lock_); |
| STLDeleteElements(&methods_to_patch_); |
| } |
| #if defined(ART_USE_LLVM_COMPILER) |
| CompilerCallbackFn f = FindFunction<CompilerCallbackFn>(MakeCompilerSoName(instruction_set_), |
| compiler_library_, |
| "compilerLLVMDispose"); |
| (*f)(*this); |
| #endif |
| if (compiler_library_ != NULL) { |
| VLOG(compiler) << "dlclose(" << compiler_library_ << ")"; |
| dlclose(compiler_library_); |
| } |
| } |
| |
| ByteArray* Compiler::CreateResolutionStub(InstructionSet instruction_set, |
| Runtime::TrampolineType type) { |
| if (instruction_set == kX86) { |
| return x86::X86CreateResolutionTrampoline(type); |
| } else { |
| CHECK(instruction_set == kArm || instruction_set == kThumb2); |
| // Generates resolution stub using ARM instruction set |
| return arm::ArmCreateResolutionTrampoline(type); |
| } |
| } |
| |
| ByteArray* Compiler::CreateJniDlsymLookupStub(InstructionSet instruction_set) { |
| switch (instruction_set) { |
| case kArm: |
| case kThumb2: |
| return arm::CreateJniDlsymLookupStub(); |
| case kX86: |
| return x86::CreateJniDlsymLookupStub(); |
| default: |
| LOG(FATAL) << "Unknown InstructionSet: " << instruction_set; |
| return NULL; |
| } |
| } |
| |
| ByteArray* Compiler::CreateAbstractMethodErrorStub(InstructionSet instruction_set) { |
| if (instruction_set == kX86) { |
| return x86::CreateAbstractMethodErrorStub(); |
| } else { |
| CHECK(instruction_set == kArm || instruction_set == kThumb2); |
| // Generates resolution stub using ARM instruction set |
| return arm::CreateAbstractMethodErrorStub(); |
| } |
| } |
| |
| void Compiler::CompileAll(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files) { |
| DCHECK(!Runtime::Current()->IsStarted()); |
| |
| TimingLogger timings("compiler"); |
| |
| PreCompile(class_loader, dex_files, timings); |
| |
| Compile(class_loader, dex_files); |
| timings.AddSplit("Compile"); |
| |
| PostCompile(class_loader, dex_files); |
| timings.AddSplit("PostCompile"); |
| |
| if (dump_timings_ && timings.GetTotalNs() > MsToNs(1000)) { |
| timings.Dump(); |
| } |
| |
| if (dump_stats_) { |
| stats_->Dump(); |
| } |
| } |
| |
| void Compiler::CompileOne(const Method* method) { |
| DCHECK(!Runtime::Current()->IsStarted()); |
| |
| const ClassLoader* class_loader = method->GetDeclaringClass()->GetClassLoader(); |
| |
| // Find the dex_file |
| const DexCache* dex_cache = method->GetDeclaringClass()->GetDexCache(); |
| const DexFile& dex_file = Runtime::Current()->GetClassLinker()->FindDexFile(dex_cache); |
| std::vector<const DexFile*> dex_files; |
| dex_files.push_back(&dex_file); |
| |
| TimingLogger timings("CompileOne"); |
| PreCompile(class_loader, dex_files, timings); |
| |
| uint32_t method_idx = method->GetDexMethodIndex(); |
| const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset()); |
| CompileMethod(code_item, method->GetAccessFlags(), method_idx, class_loader, dex_file); |
| |
| PostCompile(class_loader, dex_files); |
| } |
| |
| void Compiler::Resolve(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files, TimingLogger& timings) { |
| for (size_t i = 0; i != dex_files.size(); ++i) { |
| const DexFile* dex_file = dex_files[i]; |
| CHECK(dex_file != NULL); |
| ResolveDexFile(class_loader, *dex_file, timings); |
| } |
| } |
| |
| void Compiler::PreCompile(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files, TimingLogger& timings) { |
| Resolve(class_loader, dex_files, timings); |
| |
| Verify(class_loader, dex_files); |
| timings.AddSplit("PreCompile.Verify"); |
| |
| InitializeClassesWithoutClinit(class_loader, dex_files); |
| timings.AddSplit("PreCompile.InitializeClassesWithoutClinit"); |
| } |
| |
| void Compiler::PostCompile(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files) { |
| SetGcMaps(class_loader, dex_files); |
| #if defined(ART_USE_LLVM_COMPILER) |
| CompilerCallbackFn f = FindFunction<CompilerCallbackFn>(MakeCompilerSoName(instruction_set_), |
| compiler_library_, |
| "compilerLLVMMaterializeRemainder"); |
| (*f)(*this); |
| #endif |
| } |
| |
| bool Compiler::IsImageClass(const std::string& descriptor) const { |
| if (image_classes_ == NULL) { |
| return true; |
| } |
| return image_classes_->find(descriptor) != image_classes_->end(); |
| } |
| |
| bool Compiler::CanAssumeTypeIsPresentInDexCache(const DexCache* dex_cache, |
| uint32_t type_idx) { |
| if (!IsImage()) { |
| stats_->TypeNotInDexCache(); |
| return false; |
| } |
| Class* resolved_class = dex_cache->GetResolvedType(type_idx); |
| if (resolved_class == NULL) { |
| stats_->TypeNotInDexCache(); |
| return false; |
| } |
| bool result = IsImageClass(ClassHelper(resolved_class).GetDescriptor()); |
| if (result) { |
| stats_->TypeInDexCache(); |
| } else { |
| stats_->TypeNotInDexCache(); |
| } |
| return result; |
| } |
| |
| bool Compiler::CanAssumeStringIsPresentInDexCache(const DexCache* dex_cache, |
| uint32_t string_idx) { |
| // TODO: Add support for loading strings referenced by image_classes_ |
| // See also Compiler::ResolveDexFile |
| |
| // The following is a test saying that if we're building the image without a restricted set of |
| // image classes then we can assume the string is present in the dex cache if it is there now |
| bool result = IsImage() && image_classes_ == NULL && dex_cache->GetResolvedString(string_idx) != NULL; |
| if (result) { |
| stats_->StringInDexCache(); |
| } else { |
| stats_->StringNotInDexCache(); |
| } |
| return result; |
| } |
| |
| bool Compiler::CanAccessTypeWithoutChecks(uint32_t referrer_idx, const DexCache* dex_cache, |
| const DexFile& dex_file, uint32_t type_idx) { |
| // Get type from dex cache assuming it was populated by the verifier |
| Class* resolved_class = dex_cache->GetResolvedType(type_idx); |
| if (resolved_class == NULL) { |
| stats_->TypeNeedsAccessCheck(); |
| return false; // Unknown class needs access checks. |
| } |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); |
| Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); |
| if (referrer_class == NULL) { |
| stats_->TypeNeedsAccessCheck(); |
| return false; // Incomplete referrer knowledge needs access check. |
| } |
| // Perform access check, will return true if access is ok or false if we're going to have to |
| // check this at runtime (for example for class loaders). |
| bool result = referrer_class->CanAccess(resolved_class); |
| if (result) { |
| stats_->TypeDoesntNeedAccessCheck(); |
| } else { |
| stats_->TypeNeedsAccessCheck(); |
| } |
| return result; |
| } |
| |
| bool Compiler::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, |
| const DexCache* dex_cache, |
| const DexFile& dex_file, |
| uint32_t type_idx) { |
| // Get type from dex cache assuming it was populated by the verifier. |
| Class* resolved_class = dex_cache->GetResolvedType(type_idx); |
| if (resolved_class == NULL) { |
| stats_->TypeNeedsAccessCheck(); |
| return false; // Unknown class needs access checks. |
| } |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); |
| Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); |
| if (referrer_class == NULL) { |
| stats_->TypeNeedsAccessCheck(); |
| return false; // Incomplete referrer knowledge needs access check. |
| } |
| // Perform access and instantiable checks, will return true if access is ok or false if we're |
| // going to have to check this at runtime (for example for class loaders). |
| bool result = referrer_class->CanAccess(resolved_class) && resolved_class->IsInstantiable(); |
| if (result) { |
| stats_->TypeDoesntNeedAccessCheck(); |
| } else { |
| stats_->TypeNeedsAccessCheck(); |
| } |
| return result; |
| } |
| |
| static Class* ComputeReferrerClass(OatCompilationUnit* mUnit) { |
| const DexFile::MethodId& referrer_method_id = |
| mUnit->dex_file_->GetMethodId(mUnit->method_idx_); |
| |
| return mUnit->class_linker_->ResolveType( |
| *mUnit->dex_file_, referrer_method_id.class_idx_, |
| mUnit->dex_cache_, mUnit->class_loader_); |
| } |
| |
| static Field* ComputeReferrerField(OatCompilationUnit* mUnit, uint32_t field_idx) { |
| return mUnit->class_linker_->ResolveField( |
| *mUnit->dex_file_, field_idx, mUnit->dex_cache_, |
| mUnit->class_loader_, false); |
| } |
| |
| static Method* ComputeReferrerMethod(OatCompilationUnit* mUnit, uint32_t method_idx) { |
| return mUnit->class_linker_->ResolveMethod( |
| *mUnit->dex_file_, method_idx, mUnit->dex_cache_, |
| mUnit->class_loader_, true); |
| } |
| |
| bool Compiler::ComputeInstanceFieldInfo(uint32_t field_idx, OatCompilationUnit* mUnit, |
| int& field_offset, bool& is_volatile, bool is_put) { |
| // Conservative defaults |
| field_offset = -1; |
| is_volatile = true; |
| // Try to resolve field |
| Field* resolved_field = ComputeReferrerField(mUnit, field_idx); |
| if (resolved_field != NULL) { |
| Class* referrer_class = ComputeReferrerClass(mUnit); |
| // Try to resolve referring class then access check, failure to pass the |
| Class* fields_class = resolved_field->GetDeclaringClass(); |
| bool is_write_to_final_from_wrong_class = is_put && resolved_field->IsFinal() && |
| fields_class != referrer_class; |
| if (referrer_class != NULL && referrer_class->CanAccess(fields_class) && |
| referrer_class->CanAccessMember(fields_class, resolved_field->GetAccessFlags()) && |
| !is_write_to_final_from_wrong_class) { |
| field_offset = resolved_field->GetOffset().Int32Value(); |
| is_volatile = resolved_field->IsVolatile(); |
| stats_->ResolvedInstanceField(); |
| return true; // Fast path. |
| } |
| } |
| // Clean up any exception left by field/type resolution |
| Thread* thread = Thread::Current(); |
| if (thread->IsExceptionPending()) { |
| thread->ClearException(); |
| } |
| stats_->UnresolvedInstanceField(); |
| return false; // Incomplete knowledge needs slow path. |
| } |
| |
| bool Compiler::ComputeStaticFieldInfo(uint32_t field_idx, OatCompilationUnit* mUnit, |
| int& field_offset, int& ssb_index, |
| bool& is_referrers_class, bool& is_volatile, bool is_put) { |
| // Conservative defaults |
| field_offset = -1; |
| ssb_index = -1; |
| is_referrers_class = false; |
| is_volatile = true; |
| // Try to resolve field |
| Field* resolved_field = ComputeReferrerField(mUnit, field_idx); |
| if (resolved_field != NULL) { |
| DCHECK(resolved_field->IsStatic()); |
| Class* referrer_class = ComputeReferrerClass(mUnit); |
| if (referrer_class != NULL) { |
| Class* fields_class = resolved_field->GetDeclaringClass(); |
| if (fields_class == referrer_class) { |
| is_referrers_class = true; // implies no worrying about class initialization |
| field_offset = resolved_field->GetOffset().Int32Value(); |
| is_volatile = resolved_field->IsVolatile(); |
| stats_->ResolvedLocalStaticField(); |
| return true; // fast path |
| } else { |
| bool is_write_to_final_from_wrong_class = is_put && resolved_field->IsFinal(); |
| if (referrer_class->CanAccess(fields_class) && |
| referrer_class->CanAccessMember(fields_class, resolved_field->GetAccessFlags()) && |
| !is_write_to_final_from_wrong_class) { |
| // We have the resolved field, we must make it into a ssbIndex for the referrer |
| // in its static storage base (which may fail if it doesn't have a slot for it) |
| // TODO: for images we can elide the static storage base null check |
| // if we know there's a non-null entry in the image |
| if (fields_class->GetDexCache() == mUnit->dex_cache_) { |
| // common case where the dex cache of both the referrer and the field are the same, |
| // no need to search the dex file |
| ssb_index = fields_class->GetDexTypeIndex(); |
| field_offset = resolved_field->GetOffset().Int32Value(); |
| is_volatile = resolved_field->IsVolatile(); |
| stats_->ResolvedStaticField(); |
| return true; |
| } |
| // Search dex file for localized ssb index |
| std::string descriptor(FieldHelper(resolved_field).GetDeclaringClassDescriptor()); |
| const DexFile::StringId* string_id = |
| mUnit->dex_file_->FindStringId(descriptor); |
| if (string_id != NULL) { |
| const DexFile::TypeId* type_id = |
| mUnit->dex_file_->FindTypeId(mUnit->dex_file_->GetIndexForStringId(*string_id)); |
| if (type_id != NULL) { |
| // medium path, needs check of static storage base being initialized |
| ssb_index = mUnit->dex_file_->GetIndexForTypeId(*type_id); |
| field_offset = resolved_field->GetOffset().Int32Value(); |
| is_volatile = resolved_field->IsVolatile(); |
| stats_->ResolvedStaticField(); |
| return true; |
| } |
| } |
| } |
| } |
| } |
| } |
| // Clean up any exception left by field/type resolution |
| Thread* thread = Thread::Current(); |
| if (thread->IsExceptionPending()) { |
| thread->ClearException(); |
| } |
| stats_->UnresolvedStaticField(); |
| return false; // Incomplete knowledge needs slow path. |
| } |
| |
| void Compiler::GetCodeAndMethodForDirectCall(InvokeType type, InvokeType sharp_type, Method* method, |
| uintptr_t& direct_code, uintptr_t& direct_method) { |
| direct_code = 0; |
| direct_method = 0; |
| if (sharp_type != kStatic && sharp_type != kDirect) { |
| return; |
| } |
| bool method_code_in_boot = method->GetDeclaringClass()->GetClassLoader() == NULL; |
| if (!method_code_in_boot) { |
| return; |
| } |
| bool has_clinit_trampoline = method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); |
| if (has_clinit_trampoline) { |
| return; |
| } |
| stats_->DirectCallsToBoot(type); |
| stats_->DirectMethodsToBoot(type); |
| bool compiling_boot = Runtime::Current()->GetHeap()->GetSpaces().size() == 1; |
| if (compiling_boot) { |
| const bool kSupportBootImageFixup = true; |
| if (kSupportBootImageFixup) { |
| MethodHelper mh(method); |
| if (IsImageClass(mh.GetDeclaringClassDescriptor())) { |
| // We can only branch directly to Methods that are resolved in the DexCache. |
| // Otherwise we won't invoke the resolution trampoline. |
| direct_method = -1; |
| direct_code = -1; |
| } |
| } |
| } else { |
| if (Runtime::Current()->GetHeap()->GetImageSpace()->Contains(method)) { |
| direct_method = reinterpret_cast<uintptr_t>(method); |
| } |
| direct_code = reinterpret_cast<uintptr_t>(method->GetCode()); |
| } |
| } |
| |
| bool Compiler::ComputeInvokeInfo(uint32_t method_idx, OatCompilationUnit* mUnit, InvokeType& type, |
| int& vtable_idx, uintptr_t& direct_code, |
| uintptr_t& direct_method) { |
| vtable_idx = -1; |
| direct_code = 0; |
| direct_method = 0; |
| Method* resolved_method = ComputeReferrerMethod(mUnit, method_idx); |
| if (resolved_method != NULL) { |
| Class* referrer_class = ComputeReferrerClass(mUnit); |
| if (referrer_class != NULL) { |
| Class* methods_class = resolved_method->GetDeclaringClass(); |
| if (!referrer_class->CanAccess(methods_class) || |
| !referrer_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags())) { |
| // The referring class can't access the resolved method, this may occur as a result of a |
| // protected method being made public by implementing an interface that re-declares the |
| // method public. Resort to the dex file to determine the correct class for the access check |
| const DexFile& dex_file = mUnit->class_linker_->FindDexFile(referrer_class->GetDexCache()); |
| methods_class = |
| mUnit->class_linker_->ResolveType(dex_file, |
| dex_file.GetMethodId(method_idx).class_idx_, |
| referrer_class); |
| } |
| if (referrer_class->CanAccess(methods_class) && |
| referrer_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags())) { |
| vtable_idx = resolved_method->GetMethodIndex(); |
| const bool kEnableSharpening = true; |
| // Sharpen a virtual call into a direct call when the target is known. |
| bool can_sharpen = type == kVirtual && (resolved_method->IsFinal() || |
| methods_class->IsFinal()); |
| // ensure the vtable index will be correct to dispatch in the vtable of the super class |
| can_sharpen = can_sharpen || (type == kSuper && referrer_class != methods_class && |
| referrer_class->IsSubClass(methods_class) && |
| vtable_idx < methods_class->GetVTable()->GetLength() && |
| methods_class->GetVTable()->Get(vtable_idx) == resolved_method); |
| if (kEnableSharpening && can_sharpen) { |
| stats_->ResolvedMethod(type); |
| // Sharpen a virtual call into a direct call. The method_idx is into referrer's |
| // dex cache, check that this resolved method is where we expect it. |
| CHECK(referrer_class->GetDexCache()->GetResolvedMethod(method_idx) == resolved_method) |
| << PrettyMethod(resolved_method); |
| stats_->VirtualMadeDirect(type); |
| GetCodeAndMethodForDirectCall(type, kDirect, resolved_method, direct_code, direct_method); |
| type = kDirect; |
| return true; |
| } else if (type == kSuper) { |
| // Unsharpened super calls are suspicious so go slowpath. |
| } else { |
| stats_->ResolvedMethod(type); |
| GetCodeAndMethodForDirectCall(type, type, resolved_method, direct_code, direct_method); |
| return true; |
| } |
| } |
| } |
| } |
| // Clean up any exception left by method/type resolution |
| Thread* thread = Thread::Current(); |
| if (thread->IsExceptionPending()) { |
| thread->ClearException(); |
| } |
| stats_->UnresolvedMethod(type); |
| return false; // Incomplete knowledge needs slow path. |
| } |
| |
| void Compiler::AddCodePatch(DexCache* dex_cache, |
| const DexFile* dex_file, |
| uint32_t referrer_method_idx, |
| uint32_t referrer_access_flags, |
| uint32_t target_method_idx, |
| bool target_is_direct, |
| size_t literal_offset) { |
| MutexLock mu(compiled_methods_lock_); |
| code_to_patch_.push_back(new PatchInformation(dex_cache, |
| dex_file, |
| referrer_method_idx, |
| referrer_access_flags, |
| target_method_idx, |
| target_is_direct, |
| literal_offset)); |
| } |
| void Compiler::AddMethodPatch(DexCache* dex_cache, |
| const DexFile* dex_file, |
| uint32_t referrer_method_idx, |
| uint32_t referrer_access_flags, |
| uint32_t target_method_idx, |
| bool target_is_direct, |
| size_t literal_offset) { |
| MutexLock mu(compiled_methods_lock_); |
| methods_to_patch_.push_back(new PatchInformation(dex_cache, |
| dex_file, |
| referrer_method_idx, |
| referrer_access_flags, |
| target_method_idx, |
| target_is_direct, |
| literal_offset)); |
| } |
| |
| // Return true if the class should be skipped during compilation. We |
| // never skip classes in the boot class loader. However, if we have a |
| // non-boot class loader and we can resolve the class in the boot |
| // class loader, we do skip the class. This happens if an app bundles |
| // classes found in the boot classpath. Since at runtime we will |
| // select the class from the boot classpath, do not attempt to resolve |
| // or compile it now. |
| static bool SkipClass(const ClassLoader* class_loader, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& class_def) { |
| if (class_loader == NULL) { |
| return false; |
| } |
| const char* descriptor = dex_file.GetClassDescriptor(class_def); |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| Class* klass = class_linker->FindClass(descriptor, NULL); |
| if (klass == NULL) { |
| Thread* self = Thread::Current(); |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| return false; |
| } |
| return true; |
| } |
| |
| class Context { |
| public: |
| Context(ClassLinker* class_linker, |
| const ClassLoader* class_loader, |
| Compiler* compiler, |
| DexCache* dex_cache, |
| const DexFile* dex_file) |
| : class_linker_(class_linker), |
| class_loader_(class_loader), |
| compiler_(compiler), |
| dex_cache_(dex_cache), |
| dex_file_(dex_file) {} |
| |
| ClassLinker* GetClassLinker() { |
| CHECK(class_linker_ != NULL); |
| return class_linker_; |
| } |
| const ClassLoader* GetClassLoader() { |
| return class_loader_; |
| } |
| Compiler* GetCompiler() { |
| CHECK(compiler_ != NULL); |
| return compiler_; |
| } |
| DexCache* GetDexCache() { |
| CHECK(dex_cache_ != NULL); |
| return dex_cache_; |
| } |
| const DexFile* GetDexFile() { |
| CHECK(dex_file_ != NULL); |
| return dex_file_; |
| } |
| |
| private: |
| ClassLinker* class_linker_; |
| const ClassLoader* class_loader_; |
| Compiler* compiler_; |
| DexCache* dex_cache_; |
| const DexFile* dex_file_; |
| }; |
| |
| typedef void Callback(Context* context, size_t index); |
| |
| class WorkerThread { |
| public: |
| WorkerThread(Context* context, size_t begin, size_t end, Callback callback, size_t stripe, bool spawn) |
| : spawn_(spawn), context_(context), begin_(begin), end_(end), callback_(callback), stripe_(stripe) { |
| if (spawn_) { |
| CHECK_PTHREAD_CALL(pthread_create, (&pthread_, NULL, &Go, this), "compiler worker thread"); |
| } |
| } |
| |
| ~WorkerThread() { |
| if (spawn_) { |
| CHECK_PTHREAD_CALL(pthread_join, (pthread_, NULL), "compiler worker shutdown"); |
| } |
| } |
| |
| private: |
| static void* Go(void* arg) { |
| WorkerThread* worker = reinterpret_cast<WorkerThread*>(arg); |
| Runtime* runtime = Runtime::Current(); |
| if (worker->spawn_) { |
| runtime->AttachCurrentThread("Compiler Worker", true, NULL); |
| } |
| Thread::Current()->SetState(Thread::kRunnable); |
| worker->Run(); |
| if (worker->spawn_) { |
| Thread::Current()->SetState(Thread::kNative); |
| runtime->DetachCurrentThread(); |
| } |
| return NULL; |
| } |
| |
| void Go() { |
| Go(this); |
| } |
| |
| void Run() { |
| for (size_t i = begin_; i < end_; i += stripe_) { |
| callback_(context_, i); |
| } |
| } |
| |
| pthread_t pthread_; |
| bool spawn_; |
| |
| Context* context_; |
| size_t begin_; |
| size_t end_; |
| Callback* callback_; |
| size_t stripe_; |
| |
| friend void ForAll(Context*, size_t, size_t, Callback, size_t); |
| }; |
| |
| void ForAll(Context* context, size_t begin, size_t end, Callback callback, size_t thread_count) { |
| CHECK_GT(thread_count, 0U); |
| |
| std::vector<WorkerThread*> threads; |
| for (size_t i = 0; i < thread_count; ++i) { |
| threads.push_back(new WorkerThread(context, begin + i, end, callback, thread_count, (i != 0))); |
| } |
| threads[0]->Go(); |
| |
| // Switch to kVmWait while we're blocked waiting for the other threads to finish. |
| ScopedThreadStateChange tsc(Thread::Current(), Thread::kVmWait); |
| STLDeleteElements(&threads); |
| } |
| |
| static void ResolveClassFieldsAndMethods(Context* context, size_t class_def_index) { |
| const DexFile& dex_file = *context->GetDexFile(); |
| |
| // Method and Field are the worst. We can't resolve without either |
| // context from the code use (to disambiguate virtual vs direct |
| // method and instance vs static field) or from class |
| // definitions. While the compiler will resolve what it can as it |
| // needs it, here we try to resolve fields and methods used in class |
| // definitions, since many of them many never be referenced by |
| // generated code. |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| if (SkipClass(context->GetClassLoader(), dex_file, class_def)) { |
| return; |
| } |
| |
| // Note the class_data pointer advances through the headers, |
| // static fields, instance fields, direct methods, and virtual |
| // methods. |
| const byte* class_data = dex_file.GetClassData(class_def); |
| if (class_data == NULL) { |
| // empty class such as a marker interface |
| return; |
| } |
| Thread* self = Thread::Current(); |
| ClassLinker* class_linker = context->GetClassLinker(); |
| DexCache* dex_cache = class_linker->FindDexCache(dex_file); |
| ClassDataItemIterator it(dex_file, class_data); |
| while (it.HasNextStaticField()) { |
| Field* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), dex_cache, |
| context->GetClassLoader(), true); |
| if (field == NULL) { |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| } |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| Field* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), dex_cache, |
| context->GetClassLoader(), false); |
| if (field == NULL) { |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| } |
| it.Next(); |
| } |
| while (it.HasNextDirectMethod()) { |
| Method* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), dex_cache, |
| context->GetClassLoader(), true); |
| if (method == NULL) { |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| } |
| it.Next(); |
| } |
| while (it.HasNextVirtualMethod()) { |
| Method* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), dex_cache, |
| context->GetClassLoader(), false); |
| if (method == NULL) { |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| } |
| it.Next(); |
| } |
| DCHECK(!it.HasNext()); |
| } |
| |
| static void ResolveType(Context* context, size_t type_idx) { |
| // Class derived values are more complicated, they require the linker and loader. |
| Thread* self = Thread::Current(); |
| Class* klass = context->GetClassLinker()->ResolveType(*context->GetDexFile(), |
| type_idx, |
| context->GetDexCache(), |
| context->GetClassLoader()); |
| if (klass == NULL) { |
| CHECK(self->IsExceptionPending()); |
| Thread::Current()->ClearException(); |
| } |
| } |
| |
| void Compiler::ResolveDexFile(const ClassLoader* class_loader, const DexFile& dex_file, TimingLogger& timings) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| DexCache* dex_cache = class_linker->FindDexCache(dex_file); |
| |
| // Strings are easy in that they always are simply resolved to literals in the same file |
| if (image_ && image_classes_ == NULL) { |
| // TODO: Add support for loading strings referenced by image_classes_ |
| // See also Compiler::CanAssumeTypeIsPresentInDexCache. |
| for (size_t string_idx = 0; string_idx < dex_cache->NumStrings(); string_idx++) { |
| class_linker->ResolveString(dex_file, string_idx, dex_cache); |
| } |
| timings.AddSplit("Resolve " + dex_file.GetLocation() + " Strings"); |
| } |
| |
| Context context(class_linker, class_loader, this, dex_cache, &dex_file); |
| ForAll(&context, 0, dex_cache->NumResolvedTypes(), ResolveType, thread_count_); |
| timings.AddSplit("Resolve " + dex_file.GetLocation() + " Types"); |
| |
| ForAll(&context, 0, dex_file.NumClassDefs(), ResolveClassFieldsAndMethods, thread_count_); |
| timings.AddSplit("Resolve " + dex_file.GetLocation() + " MethodsAndFields"); |
| } |
| |
| void Compiler::Verify(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files) { |
| for (size_t i = 0; i != dex_files.size(); ++i) { |
| const DexFile* dex_file = dex_files[i]; |
| CHECK(dex_file != NULL); |
| VerifyDexFile(class_loader, *dex_file); |
| } |
| } |
| |
| static void VerifyClass(Context* context, size_t class_def_index) { |
| const DexFile::ClassDef& class_def = context->GetDexFile()->GetClassDef(class_def_index); |
| const char* descriptor = context->GetDexFile()->GetClassDescriptor(class_def); |
| Class* klass = context->GetClassLinker()->FindClass(descriptor, context->GetClassLoader()); |
| if (klass == NULL) { |
| Thread* self = Thread::Current(); |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| |
| /* |
| * At compile time, we can still structurally verify the class even if FindClass fails. |
| * This is to ensure the class is structurally sound for compilation. An unsound class |
| * will be rejected by the verifier and later skipped during compilation in the compiler. |
| */ |
| std::string error_msg; |
| if (!verifier::DexVerifier::VerifyClass(context->GetDexFile(), context->GetDexCache(), |
| context->GetClassLoader(), class_def_index, error_msg)) { |
| const DexFile::ClassDef& class_def = context->GetDexFile()->GetClassDef(class_def_index); |
| LOG(ERROR) << "Verification failed on class " |
| << PrettyDescriptor(context->GetDexFile()->GetClassDescriptor(class_def)) |
| << " because: " << error_msg; |
| } |
| return; |
| } |
| CHECK(klass->IsResolved()) << PrettyClass(klass); |
| context->GetClassLinker()->VerifyClass(klass); |
| |
| if (klass->IsErroneous()) { |
| // ClassLinker::VerifyClass throws, which isn't useful in the compiler. |
| CHECK(Thread::Current()->IsExceptionPending()); |
| Thread::Current()->ClearException(); |
| art::Compiler::ClassReference ref(context->GetDexFile(), class_def_index); |
| if (!verifier::DexVerifier::IsClassRejected(ref)) { |
| // If the erroneous class wasn't rejected by the verifier, it was a soft error. We want |
| // to try verification again at run-time, so move back into the resolved state. |
| klass->SetStatus(Class::kStatusResolved); |
| } |
| } |
| |
| CHECK(klass->IsVerified() || klass->IsResolved() || klass->IsErroneous()) << PrettyClass(klass); |
| CHECK(!Thread::Current()->IsExceptionPending()) << PrettyTypeOf(Thread::Current()->GetException()); |
| } |
| |
| void Compiler::VerifyDexFile(const ClassLoader* class_loader, const DexFile& dex_file) { |
| dex_file.ChangePermissions(PROT_READ | PROT_WRITE); |
| |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| Context context(class_linker, class_loader, this, class_linker->FindDexCache(dex_file), &dex_file); |
| ForAll(&context, 0, dex_file.NumClassDefs(), VerifyClass, thread_count_); |
| |
| dex_file.ChangePermissions(PROT_READ); |
| } |
| |
| void Compiler::InitializeClassesWithoutClinit(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files) { |
| for (size_t i = 0; i != dex_files.size(); ++i) { |
| const DexFile* dex_file = dex_files[i]; |
| CHECK(dex_file != NULL); |
| InitializeClassesWithoutClinit(class_loader, *dex_file); |
| } |
| } |
| |
| void Compiler::InitializeClassesWithoutClinit(const ClassLoader* class_loader, const DexFile& dex_file) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| for (size_t class_def_index = 0; class_def_index < dex_file.NumClassDefs(); class_def_index++) { |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| const char* descriptor = dex_file.GetClassDescriptor(class_def); |
| Class* klass = class_linker->FindClass(descriptor, class_loader); |
| if (klass != NULL) { |
| if (klass->IsVerified()) { |
| // Only try to initialize classes that were successfully verified. |
| class_linker->EnsureInitialized(klass, false); |
| } |
| // record the final class status if necessary |
| Class::Status status = klass->GetStatus(); |
| ClassReference ref(&dex_file, class_def_index); |
| MutexLock mu(compiled_classes_lock_); |
| CompiledClass* compiled_class = GetCompiledClass(ref); |
| if (compiled_class == NULL) { |
| compiled_class = new CompiledClass(status); |
| compiled_classes_[ref] = compiled_class; |
| } else { |
| DCHECK_EQ(status, compiled_class->GetStatus()); |
| } |
| } |
| // clear any class not found or verification exceptions |
| Thread::Current()->ClearException(); |
| } |
| |
| DexCache* dex_cache = class_linker->FindDexCache(dex_file); |
| for (size_t type_idx = 0; type_idx < dex_cache->NumResolvedTypes(); type_idx++) { |
| Class* klass = class_linker->ResolveType(dex_file, type_idx, dex_cache, class_loader); |
| if (klass == NULL) { |
| Thread::Current()->ClearException(); |
| } else if (klass->IsInitialized()) { |
| dex_cache->GetInitializedStaticStorage()->Set(type_idx, klass); |
| } |
| } |
| } |
| |
| void Compiler::Compile(const ClassLoader* class_loader, |
| const std::vector<const DexFile*>& dex_files) { |
| for (size_t i = 0; i != dex_files.size(); ++i) { |
| const DexFile* dex_file = dex_files[i]; |
| CHECK(dex_file != NULL); |
| CompileDexFile(class_loader, *dex_file); |
| } |
| } |
| |
| void Compiler::CompileClass(Context* context, size_t class_def_index) { |
| const ClassLoader* class_loader = context->GetClassLoader(); |
| const DexFile& dex_file = *context->GetDexFile(); |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| #if defined(ART_USE_LLVM_COMPILER) |
| // TODO: Remove this. We should not lock the compiler_lock_ in CompileClass() |
| // However, without this mutex lock, we will get segmentation fault before |
| // LLVM becomes multithreaded. |
| Compiler* cmplr = context->GetCompiler(); |
| CompilerMutexLockFn f = |
| FindFunction<CompilerMutexLockFn>(MakeCompilerSoName(cmplr->GetInstructionSet()), |
| cmplr->compiler_library_, |
| "compilerLLVMMutexLock"); |
| UniquePtr<MutexLock> GUARD((*f)(*cmplr)); |
| #endif |
| |
| if (SkipClass(class_loader, dex_file, class_def)) { |
| return; |
| } |
| ClassReference ref(&dex_file, class_def_index); |
| // Skip compiling classes with generic verifier failures since they will still fail at runtime |
| if (verifier::DexVerifier::IsClassRejected(ref)) { |
| return; |
| } |
| const byte* class_data = dex_file.GetClassData(class_def); |
| if (class_data == NULL) { |
| // empty class, probably a marker interface |
| return; |
| } |
| ClassDataItemIterator it(dex_file, class_data); |
| // Skip fields |
| while (it.HasNextStaticField()) { |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| it.Next(); |
| } |
| // Compile direct methods |
| while (it.HasNextDirectMethod()) { |
| context->GetCompiler()->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), |
| it.GetMemberIndex(), class_loader, dex_file); |
| it.Next(); |
| } |
| // Compile virtual methods |
| while (it.HasNextVirtualMethod()) { |
| context->GetCompiler()->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), |
| it.GetMemberIndex(), class_loader, dex_file); |
| it.Next(); |
| } |
| DCHECK(!it.HasNext()); |
| } |
| |
| void Compiler::CompileDexFile(const ClassLoader* class_loader, const DexFile& dex_file) { |
| Context context(NULL, class_loader, this, NULL, &dex_file); |
| ForAll(&context, 0, dex_file.NumClassDefs(), Compiler::CompileClass, thread_count_); |
| } |
| |
| void Compiler::CompileMethod(const DexFile::CodeItem* code_item, uint32_t access_flags, |
| uint32_t method_idx, const ClassLoader* class_loader, |
| const DexFile& dex_file) { |
| CompiledMethod* compiled_method = NULL; |
| uint64_t start_ns = NanoTime(); |
| |
| if ((access_flags & kAccNative) != 0) { |
| compiled_method = (*jni_compiler_)(*this, access_flags, method_idx, class_loader, dex_file); |
| CHECK(compiled_method != NULL); |
| } else if ((access_flags & kAccAbstract) != 0) { |
| } else { |
| compiled_method = (*compiler_)(*this, code_item, access_flags, method_idx, class_loader, |
| dex_file); |
| CHECK(compiled_method != NULL) << PrettyMethod(method_idx, dex_file); |
| } |
| uint64_t duration_ns = NanoTime() - start_ns; |
| if (duration_ns > MsToNs(100)) { |
| LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) |
| << " took " << PrettyDuration(duration_ns); |
| } |
| |
| if (compiled_method != NULL) { |
| MethodReference ref(&dex_file, method_idx); |
| CHECK(GetCompiledMethod(ref) == NULL) << PrettyMethod(method_idx, dex_file); |
| MutexLock mu(compiled_methods_lock_); |
| compiled_methods_[ref] = compiled_method; |
| DCHECK(GetCompiledMethod(ref) != NULL) << PrettyMethod(method_idx, dex_file); |
| } |
| |
| uint32_t shorty_len; |
| const char* shorty = dex_file.GetMethodShorty(dex_file.GetMethodId(method_idx), &shorty_len); |
| bool is_static = (access_flags & kAccStatic) != 0; |
| const CompiledInvokeStub* compiled_invoke_stub = FindInvokeStub(is_static, shorty); |
| if (compiled_invoke_stub == NULL) { |
| compiled_invoke_stub = (*create_invoke_stub_)(*this, is_static, shorty, shorty_len); |
| CHECK(compiled_invoke_stub != NULL); |
| InsertInvokeStub(is_static, shorty, compiled_invoke_stub); |
| } |
| CHECK(!Thread::Current()->IsExceptionPending()) << PrettyMethod(method_idx, dex_file); |
| } |
| |
| static std::string MakeInvokeStubKey(bool is_static, const char* shorty) { |
| std::string key(shorty); |
| if (is_static) { |
| key += "$"; // Must not be a shorty type character. |
| } |
| return key; |
| } |
| |
| const CompiledInvokeStub* Compiler::FindInvokeStub(bool is_static, const char* shorty) const { |
| MutexLock mu(compiled_invoke_stubs_lock_); |
| const std::string key(MakeInvokeStubKey(is_static, shorty)); |
| InvokeStubTable::const_iterator it = compiled_invoke_stubs_.find(key); |
| if (it == compiled_invoke_stubs_.end()) { |
| return NULL; |
| } else { |
| DCHECK(it->second != NULL); |
| return it->second; |
| } |
| } |
| |
| void Compiler::InsertInvokeStub(bool is_static, const char* shorty, |
| const CompiledInvokeStub* compiled_invoke_stub) { |
| MutexLock mu(compiled_invoke_stubs_lock_); |
| std::string key(MakeInvokeStubKey(is_static, shorty)); |
| compiled_invoke_stubs_[key] = compiled_invoke_stub; |
| } |
| |
| CompiledClass* Compiler::GetCompiledClass(ClassReference ref) const { |
| MutexLock mu(compiled_classes_lock_); |
| ClassTable::const_iterator it = compiled_classes_.find(ref); |
| if (it == compiled_classes_.end()) { |
| return NULL; |
| } |
| CHECK(it->second != NULL); |
| return it->second; |
| } |
| |
| CompiledMethod* Compiler::GetCompiledMethod(MethodReference ref) const { |
| MutexLock mu(compiled_methods_lock_); |
| MethodTable::const_iterator it = compiled_methods_.find(ref); |
| if (it == compiled_methods_.end()) { |
| return NULL; |
| } |
| CHECK(it->second != NULL); |
| return it->second; |
| } |
| |
| void Compiler::SetGcMaps(const ClassLoader* class_loader, const std::vector<const DexFile*>& dex_files) { |
| for (size_t i = 0; i != dex_files.size(); ++i) { |
| const DexFile* dex_file = dex_files[i]; |
| CHECK(dex_file != NULL); |
| SetGcMapsDexFile(class_loader, *dex_file); |
| } |
| } |
| |
| void Compiler::SetGcMapsDexFile(const ClassLoader* class_loader, const DexFile& dex_file) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| DexCache* dex_cache = class_linker->FindDexCache(dex_file); |
| for (size_t class_def_index = 0; class_def_index < dex_file.NumClassDefs(); class_def_index++) { |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| const char* descriptor = dex_file.GetClassDescriptor(class_def); |
| Class* klass = class_linker->FindClass(descriptor, class_loader); |
| if (klass == NULL || !klass->IsVerified()) { |
| Thread::Current()->ClearException(); |
| continue; |
| } |
| const byte* class_data = dex_file.GetClassData(class_def); |
| if (class_data == NULL) { |
| // empty class such as a marker interface |
| continue; |
| } |
| ClassDataItemIterator it(dex_file, class_data); |
| while (it.HasNextStaticField()) { |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| it.Next(); |
| } |
| while (it.HasNextDirectMethod()) { |
| Method* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), dex_cache, |
| class_loader, true); |
| SetGcMapsMethod(dex_file, method); |
| it.Next(); |
| } |
| while (it.HasNextVirtualMethod()) { |
| Method* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), dex_cache, |
| class_loader, false); |
| SetGcMapsMethod(dex_file, method); |
| it.Next(); |
| } |
| } |
| } |
| |
| void Compiler::SetGcMapsMethod(const DexFile& dex_file, Method* method) { |
| if (method == NULL) { |
| Thread::Current()->ClearException(); |
| return; |
| } |
| uint16_t method_idx = method->GetDexMethodIndex(); |
| MethodReference ref(&dex_file, method_idx); |
| CompiledMethod* compiled_method = GetCompiledMethod(ref); |
| if (compiled_method == NULL) { |
| return; |
| } |
| const std::vector<uint8_t>* gc_map = verifier::DexVerifier::GetGcMap(ref); |
| if (gc_map == NULL) { |
| return; |
| } |
| compiled_method->SetGcMap(*gc_map); |
| } |
| |
| #if defined(ART_USE_LLVM_COMPILER) |
| void Compiler::SetElfFileName(std::string const& filename) { |
| typedef void (*SetElfFileNameFn)(Compiler&, std::string const&); |
| |
| SetElfFileNameFn set_elf_file_name = |
| FindFunction<SetElfFileNameFn>(MakeCompilerSoName(instruction_set_), |
| compiler_library_, |
| "compilerLLVMSetElfFileName"); |
| |
| set_elf_file_name(*this, filename); |
| } |
| |
| void Compiler::SetBitcodeFileName(std::string const& filename) { |
| typedef void (*SetBitcodeFileNameFn)(Compiler&, std::string const&); |
| |
| SetBitcodeFileNameFn set_bitcode_file_name = |
| FindFunction<SetBitcodeFileNameFn>(MakeCompilerSoName(instruction_set_), |
| compiler_library_, |
| "compilerLLVMSetBitcodeFileName"); |
| |
| set_bitcode_file_name(*this, filename); |
| } |
| #endif |
| |
| } // namespace art |