compiler/common_compiler_test.cc - fp2-dev/platform/art - Gitiles

 /*
  * 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 "common_compiler_test.h"

 #if defined(__arm__)
 #include <sys/ucontext.h>
 #endif
 #include <fstream>

 #include "class_linker.h"
 #include "compiled_method.h"
 #include "dex/quick_compiler_callbacks.h"
 #include "dex/verification_results.h"
 #include "dex/quick/dex_file_to_method_inliner_map.h"
 #include "driver/compiler_driver.h"
 #include "entrypoints/entrypoint_utils.h"
 #include "interpreter/interpreter.h"
 #include "mirror/art_method.h"
 #include "mirror/dex_cache.h"
 #include "mirror/object-inl.h"
 #include "scoped_thread_state_change.h"
 #include "thread-inl.h"
 #include "utils.h"

 namespace art {

 // Normally the ClassLinker supplies this.
 extern "C" void art_quick_generic_jni_trampoline(mirror::ArtMethod*);

 #if defined(__arm__)
 // A signal handler called when have an illegal instruction.  We record the fact in
 // a global boolean and then increment the PC in the signal context to return to
 // the next instruction.  We know the instruction is an sdiv (4 bytes long).
 static void baddivideinst(int signo, siginfo *si, void *data) {
   UNUSED(signo);
   UNUSED(si);
   struct ucontext *uc = (struct ucontext *)data;
   struct sigcontext *sc = &uc->uc_mcontext;
   sc->arm_r0 = 0;     // set R0 to #0 to signal error
   sc->arm_pc += 4;    // skip offending instruction
 }

 // This is in arch/arm/arm_sdiv.S.  It does the following:
 // mov r1,#1
 // sdiv r0,r1,r1
 // bx lr
 //
 // the result will be the value 1 if sdiv is supported.  If it is not supported
 // a SIGILL signal will be raised and the signal handler (baddivideinst) called.
 // The signal handler sets r0 to #0 and then increments pc beyond the failed instruction.
 // Thus if the instruction is not supported, the result of this function will be #0

 extern "C" bool CheckForARMSDIVInstruction();

 static InstructionSetFeatures GuessInstructionFeatures() {
   InstructionSetFeatures f;

   // Uncomment this for processing of /proc/cpuinfo.
   if (false) {
     // Look in /proc/cpuinfo for features we need.  Only use this when we can guarantee that
     // the kernel puts the appropriate feature flags in here.  Sometimes it doesn't.
     std::ifstream in("/proc/cpuinfo");
     if (in) {
       while (!in.eof()) {
         std::string line;
         std::getline(in, line);
         if (!in.eof()) {
           if (line.find("Features") != std::string::npos) {
             if (line.find("idivt") != std::string::npos) {
               f.SetHasDivideInstruction(true);
             }
           }
         }
         in.close();
       }
     } else {
       LOG(INFO) << "Failed to open /proc/cpuinfo";
     }
   }

   // See if have a sdiv instruction.  Register a signal handler and try to execute
   // an sdiv instruction.  If we get a SIGILL then it's not supported.  We can't use
   // the /proc/cpuinfo method for this because Krait devices don't always put the idivt
   // feature in the list.
   struct sigaction sa, osa;
   sa.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
   sa.sa_sigaction = baddivideinst;
   sigaction(SIGILL, &sa, &osa);

   if (CheckForARMSDIVInstruction()) {
     f.SetHasDivideInstruction(true);
   }

   // Restore the signal handler.
   sigaction(SIGILL, &osa, nullptr);

   // Other feature guesses in here.
   return f;
 }
 #endif

 // Given a set of instruction features from the build, parse it.  The
 // input 'str' is a comma separated list of feature names.  Parse it and
 // return the InstructionSetFeatures object.
 static InstructionSetFeatures ParseFeatureList(std::string str) {
   InstructionSetFeatures result;
   typedef std::vector<std::string> FeatureList;
   FeatureList features;
   Split(str, ',', features);
   for (FeatureList::iterator i = features.begin(); i != features.end(); i++) {
     std::string feature = Trim(*i);
     if (feature == "default") {
       // Nothing to do.
     } else if (feature == "div") {
       // Supports divide instruction.
       result.SetHasDivideInstruction(true);
     } else if (feature == "nodiv") {
       // Turn off support for divide instruction.
       result.SetHasDivideInstruction(false);
     } else {
       LOG(FATAL) << "Unknown instruction set feature: '" << feature << "'";
     }
   }
   // Others...
   return result;
 }

 CommonCompilerTest::CommonCompilerTest() {}
 CommonCompilerTest::~CommonCompilerTest() {}

 OatFile::OatMethod CommonCompilerTest::CreateOatMethod(const void* code, const uint8_t* gc_map) {
   CHECK(code != nullptr);
   const byte* base;
   uint32_t code_offset, gc_map_offset;
   if (gc_map == nullptr) {
     base = reinterpret_cast<const byte*>(code);  // Base of data points at code.
     base -= kPointerSize;  // Move backward so that code_offset != 0.
     code_offset = kPointerSize;
     gc_map_offset = 0;
   } else {
     // TODO: 64bit support.
     base = nullptr;  // Base of data in oat file, ie 0.
     code_offset = PointerToLowMemUInt32(code);
     gc_map_offset = PointerToLowMemUInt32(gc_map);
   }
   return OatFile::OatMethod(base, code_offset, gc_map_offset);
 }

 void CommonCompilerTest::MakeExecutable(mirror::ArtMethod* method) {
   CHECK(method != nullptr);

   const CompiledMethod* compiled_method = nullptr;
   if (!method->IsAbstract()) {
     mirror::DexCache* dex_cache = method->GetDeclaringClass()->GetDexCache();
     const DexFile& dex_file = *dex_cache->GetDexFile();
     compiled_method =
         compiler_driver_->GetCompiledMethod(MethodReference(&dex_file,
                                                             method->GetDexMethodIndex()));
   }
   if (compiled_method != nullptr) {
     const std::vector<uint8_t>* code = compiled_method->GetQuickCode();
     const void* code_ptr;
     if (code != nullptr) {
       uint32_t code_size = code->size();
       CHECK_NE(0u, code_size);
       const std::vector<uint8_t>& vmap_table = compiled_method->GetVmapTable();
       uint32_t vmap_table_offset = vmap_table.empty() ? 0u
           : sizeof(OatQuickMethodHeader) + vmap_table.size();
       const std::vector<uint8_t>& mapping_table = compiled_method->GetMappingTable();
       uint32_t mapping_table_offset = mapping_table.empty() ? 0u
           : sizeof(OatQuickMethodHeader) + vmap_table.size() + mapping_table.size();
       OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset,
                                          compiled_method->GetFrameSizeInBytes(),
                                          compiled_method->GetCoreSpillMask(),
                                          compiled_method->GetFpSpillMask(), code_size);

       header_code_and_maps_chunks_.push_back(std::vector<uint8_t>());
       std::vector<uint8_t>* chunk = &header_code_and_maps_chunks_.back();
       size_t size = sizeof(method_header) + code_size + vmap_table.size() + mapping_table.size();
       size_t code_offset = compiled_method->AlignCode(size - code_size);
       size_t padding = code_offset - (size - code_size);
       chunk->reserve(padding + size);
       chunk->resize(sizeof(method_header));
       memcpy(&(*chunk)[0], &method_header, sizeof(method_header));
       chunk->insert(chunk->begin(), vmap_table.begin(), vmap_table.end());
       chunk->insert(chunk->begin(), mapping_table.begin(), mapping_table.end());
       chunk->insert(chunk->begin(), padding, 0);
       chunk->insert(chunk->end(), code->begin(), code->end());
       CHECK_EQ(padding + size, chunk->size());
       code_ptr = &(*chunk)[code_offset];
     } else {
       code = compiled_method->GetPortableCode();
       code_ptr = &(*code)[0];
     }
     MakeExecutable(code_ptr, code->size());
     const void* method_code = CompiledMethod::CodePointer(code_ptr,
                                                           compiled_method->GetInstructionSet());
     LOG(INFO) << "MakeExecutable " << PrettyMethod(method) << " code=" << method_code;
     OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
     oat_method.LinkMethod(method);
     method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
   } else {
     // No code? You must mean to go into the interpreter.
     // Or the generic JNI...
     if (!method->IsNative()) {
       const void* method_code = kUsePortableCompiler ? GetPortableToInterpreterBridge()
           : GetQuickToInterpreterBridge();
       OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
       oat_method.LinkMethod(method);
       method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge);
     } else {
       const void* method_code = reinterpret_cast<void*>(art_quick_generic_jni_trampoline);

       OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
       oat_method.LinkMethod(method);
       method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
     }
   }
   // Create bridges to transition between different kinds of compiled bridge.
   if (method->GetEntryPointFromPortableCompiledCode() == nullptr) {
     method->SetEntryPointFromPortableCompiledCode(GetPortableToQuickBridge());
   } else {
     CHECK(method->GetEntryPointFromQuickCompiledCode() == nullptr);
     method->SetEntryPointFromQuickCompiledCode(GetQuickToPortableBridge());
     method->SetIsPortableCompiled();
   }
 }

 void CommonCompilerTest::MakeExecutable(const void* code_start, size_t code_length) {
   CHECK(code_start != nullptr);
   CHECK_NE(code_length, 0U);
   uintptr_t data = reinterpret_cast<uintptr_t>(code_start);
   uintptr_t base = RoundDown(data, kPageSize);
   uintptr_t limit = RoundUp(data + code_length, kPageSize);
   uintptr_t len = limit - base;
   int result = mprotect(reinterpret_cast<void*>(base), len, PROT_READ | PROT_WRITE | PROT_EXEC);
   CHECK_EQ(result, 0);

   // Flush instruction cache
   // Only uses __builtin___clear_cache if GCC >= 4.3.3
 #if GCC_VERSION >= 40303
   __builtin___clear_cache(reinterpret_cast<void*>(base), reinterpret_cast<void*>(base + len));
 #else
   // Only warn if not Intel as Intel doesn't have cache flush instructions.
 #if !defined(__i386__) && !defined(__x86_64__)
   LOG(WARNING) << "UNIMPLEMENTED: cache flush";
 #endif
 #endif
 }

 void CommonCompilerTest::MakeExecutable(mirror::ClassLoader* class_loader, const char* class_name) {
   std::string class_descriptor(DotToDescriptor(class_name));
   Thread* self = Thread::Current();
   StackHandleScope<1> hs(self);
   Handle<mirror::ClassLoader> loader(hs.NewHandle(class_loader));
   mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), loader);
   CHECK(klass != nullptr) << "Class not found " << class_name;
   for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
     MakeExecutable(klass->GetDirectMethod(i));
   }
   for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
     MakeExecutable(klass->GetVirtualMethod(i));
   }
 }

 void CommonCompilerTest::SetUp() {
   CommonRuntimeTest::SetUp();
   {
     ScopedObjectAccess soa(Thread::Current());

     InstructionSet instruction_set = kRuntimeISA;

     // Take the default set of instruction features from the build.
     InstructionSetFeatures instruction_set_features =
         ParseFeatureList(Runtime::GetDefaultInstructionSetFeatures());

 #if defined(__arm__)
     InstructionSetFeatures runtime_features = GuessInstructionFeatures();

     // for ARM, do a runtime check to make sure that the features we are passed from
     // the build match the features we actually determine at runtime.
     ASSERT_LE(instruction_set_features, runtime_features);
 #endif

     runtime_->SetInstructionSet(instruction_set);
     for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
       Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
       if (!runtime_->HasCalleeSaveMethod(type)) {
         runtime_->SetCalleeSaveMethod(
             runtime_->CreateCalleeSaveMethod(type), type);
       }
     }

     // TODO: make selectable
     Compiler::Kind compiler_kind
     = (kUsePortableCompiler) ? Compiler::kPortable : Compiler::kQuick;
     timer_.reset(new CumulativeLogger("Compilation times"));
     compiler_driver_.reset(new CompilerDriver(compiler_options_.get(),
                                               verification_results_.get(),
                                               method_inliner_map_.get(),
                                               compiler_kind, instruction_set,
                                               instruction_set_features,
                                               true, new std::set<std::string>,
                                               2, true, true, timer_.get()));
   }
   // We typically don't generate an image in unit tests, disable this optimization by default.
   compiler_driver_->SetSupportBootImageFixup(false);
 }

 void CommonCompilerTest::SetUpRuntimeOptions(RuntimeOptions* options) {
   CommonRuntimeTest::SetUpRuntimeOptions(options);

   compiler_options_.reset(new CompilerOptions);
   verification_results_.reset(new VerificationResults(compiler_options_.get()));
   method_inliner_map_.reset(new DexFileToMethodInlinerMap);
   callbacks_.reset(new QuickCompilerCallbacks(verification_results_.get(),
                                               method_inliner_map_.get()));
   options->push_back(std::make_pair("compilercallbacks", callbacks_.get()));
 }

 void CommonCompilerTest::TearDown() {
   timer_.reset();
   compiler_driver_.reset();
   callbacks_.reset();
   method_inliner_map_.reset();
   verification_results_.reset();
   compiler_options_.reset();

   CommonRuntimeTest::TearDown();
 }

 void CommonCompilerTest::CompileClass(mirror::ClassLoader* class_loader, const char* class_name) {
   std::string class_descriptor(DotToDescriptor(class_name));
   Thread* self = Thread::Current();
   StackHandleScope<1> hs(self);
   Handle<mirror::ClassLoader> loader(hs.NewHandle(class_loader));
   mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), loader);
   CHECK(klass != nullptr) << "Class not found " << class_name;
   for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
     CompileMethod(klass->GetDirectMethod(i));
   }
   for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
     CompileMethod(klass->GetVirtualMethod(i));
   }
 }

 void CommonCompilerTest::CompileMethod(mirror::ArtMethod* method) {
   CHECK(method != nullptr);
   TimingLogger timings("CommonTest::CompileMethod", false, false);
   TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
   compiler_driver_->CompileOne(method, &timings);
   TimingLogger::ScopedTiming t2("MakeExecutable", &timings);
   MakeExecutable(method);
 }

 void CommonCompilerTest::CompileDirectMethod(Handle<mirror::ClassLoader> class_loader,
                                              const char* class_name, const char* method_name,
                                              const char* signature) {
   std::string class_descriptor(DotToDescriptor(class_name));
   Thread* self = Thread::Current();
   mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), class_loader);
   CHECK(klass != nullptr) << "Class not found " << class_name;
   mirror::ArtMethod* method = klass->FindDirectMethod(method_name, signature);
   CHECK(method != nullptr) << "Direct method not found: "
       << class_name << "." << method_name << signature;
   CompileMethod(method);
 }

 void CommonCompilerTest::CompileVirtualMethod(Handle<mirror::ClassLoader> class_loader,
                                               const char* class_name, const char* method_name,
                                               const char* signature) {
   std::string class_descriptor(DotToDescriptor(class_name));
   Thread* self = Thread::Current();
   mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), class_loader);
   CHECK(klass != nullptr) << "Class not found " << class_name;
   mirror::ArtMethod* method = klass->FindVirtualMethod(method_name, signature);
   CHECK(method != NULL) << "Virtual method not found: "
       << class_name << "." << method_name << signature;
   CompileMethod(method);
 }

 void CommonCompilerTest::ReserveImageSpace() {
   // Reserve where the image will be loaded up front so that other parts of test set up don't
   // accidentally end up colliding with the fixed memory address when we need to load the image.
   std::string error_msg;
   image_reservation_.reset(MemMap::MapAnonymous("image reservation",
                                                 reinterpret_cast<byte*>(ART_BASE_ADDRESS),
                                                 (size_t)100 * 1024 * 1024,  // 100MB
                                                 PROT_NONE,
                                                 false /* no need for 4gb flag with fixed mmap*/,
                                                 &error_msg));
   CHECK(image_reservation_.get() != nullptr) << error_msg;
 }

 void CommonCompilerTest::UnreserveImageSpace() {
   image_reservation_.reset();
 }

 }  // namespace art
	/*
	* 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 "common_compiler_test.h"

	#if defined(__arm__)
	#include <sys/ucontext.h>
	#endif
	#include <fstream>

	#include "class_linker.h"
	#include "compiled_method.h"
	#include "dex/quick_compiler_callbacks.h"
	#include "dex/verification_results.h"
	#include "dex/quick/dex_file_to_method_inliner_map.h"
	#include "driver/compiler_driver.h"
	#include "entrypoints/entrypoint_utils.h"
	#include "interpreter/interpreter.h"
	#include "mirror/art_method.h"
	#include "mirror/dex_cache.h"
	#include "mirror/object-inl.h"
	#include "scoped_thread_state_change.h"
	#include "thread-inl.h"
	#include "utils.h"

	namespace art {

	// Normally the ClassLinker supplies this.
	extern "C" void art_quick_generic_jni_trampoline(mirror::ArtMethod*);

	#if defined(__arm__)
	// A signal handler called when have an illegal instruction. We record the fact in
	// a global boolean and then increment the PC in the signal context to return to
	// the next instruction. We know the instruction is an sdiv (4 bytes long).
	static void baddivideinst(int signo, siginfo si, void data) {
	UNUSED(signo);
	UNUSED(si);
	struct ucontext uc = (struct ucontext )data;
	struct sigcontext *sc = &uc->uc_mcontext;
	sc->arm_r0 = 0; // set R0 to #0 to signal error
	sc->arm_pc += 4; // skip offending instruction
	}

	// This is in arch/arm/arm_sdiv.S. It does the following:
	// mov r1,#1
	// sdiv r0,r1,r1
	// bx lr
	//
	// the result will be the value 1 if sdiv is supported. If it is not supported
	// a SIGILL signal will be raised and the signal handler (baddivideinst) called.
	// The signal handler sets r0 to #0 and then increments pc beyond the failed instruction.
	// Thus if the instruction is not supported, the result of this function will be #0

	extern "C" bool CheckForARMSDIVInstruction();

	static InstructionSetFeatures GuessInstructionFeatures() {
	InstructionSetFeatures f;

	// Uncomment this for processing of /proc/cpuinfo.
	if (false) {
	// Look in /proc/cpuinfo for features we need. Only use this when we can guarantee that
	// the kernel puts the appropriate feature flags in here. Sometimes it doesn't.
	std::ifstream in("/proc/cpuinfo");
	if (in) {
	while (!in.eof()) {
	std::string line;
	std::getline(in, line);
	if (!in.eof()) {
	if (line.find("Features") != std::string::npos) {
	if (line.find("idivt") != std::string::npos) {
	f.SetHasDivideInstruction(true);
	}
	}
	}
	in.close();
	}
	} else {
	LOG(INFO) << "Failed to open /proc/cpuinfo";
	}
	}

	// See if have a sdiv instruction. Register a signal handler and try to execute
	// an sdiv instruction. If we get a SIGILL then it's not supported. We can't use
	// the /proc/cpuinfo method for this because Krait devices don't always put the idivt
	// feature in the list.
	struct sigaction sa, osa;
	sa.sa_flags = SA_ONSTACK \| SA_RESTART \| SA_SIGINFO;
	sa.sa_sigaction = baddivideinst;
	sigaction(SIGILL, &sa, &osa);

	if (CheckForARMSDIVInstruction()) {
	f.SetHasDivideInstruction(true);
	}

	// Restore the signal handler.
	sigaction(SIGILL, &osa, nullptr);

	// Other feature guesses in here.
	return f;
	}
	#endif

	// Given a set of instruction features from the build, parse it. The
	// input 'str' is a comma separated list of feature names. Parse it and
	// return the InstructionSetFeatures object.
	static InstructionSetFeatures ParseFeatureList(std::string str) {
	InstructionSetFeatures result;
	typedef std::vector<std::string> FeatureList;
	FeatureList features;
	Split(str, ',', features);
	for (FeatureList::iterator i = features.begin(); i != features.end(); i++) {
	std::string feature = Trim(*i);
	if (feature == "default") {
	// Nothing to do.
	} else if (feature == "div") {
	// Supports divide instruction.
	result.SetHasDivideInstruction(true);
	} else if (feature == "nodiv") {
	// Turn off support for divide instruction.
	result.SetHasDivideInstruction(false);
	} else {
	LOG(FATAL) << "Unknown instruction set feature: '" << feature << "'";
	}
	}
	// Others...
	return result;
	}

	CommonCompilerTest::CommonCompilerTest() {}
	CommonCompilerTest::~CommonCompilerTest() {}

	OatFile::OatMethod CommonCompilerTest::CreateOatMethod(const void* code, const uint8_t* gc_map) {
	CHECK(code != nullptr);
	const byte* base;
	uint32_t code_offset, gc_map_offset;
	if (gc_map == nullptr) {
	base = reinterpret_cast<const byte*>(code); // Base of data points at code.
	base -= kPointerSize; // Move backward so that code_offset != 0.
	code_offset = kPointerSize;
	gc_map_offset = 0;
	} else {
	// TODO: 64bit support.
	base = nullptr; // Base of data in oat file, ie 0.
	code_offset = PointerToLowMemUInt32(code);
	gc_map_offset = PointerToLowMemUInt32(gc_map);
	}
	return OatFile::OatMethod(base, code_offset, gc_map_offset);
	}

	void CommonCompilerTest::MakeExecutable(mirror::ArtMethod* method) {
	CHECK(method != nullptr);

	const CompiledMethod* compiled_method = nullptr;
	if (!method->IsAbstract()) {
	mirror::DexCache* dex_cache = method->GetDeclaringClass()->GetDexCache();
	const DexFile& dex_file = *dex_cache->GetDexFile();
	compiled_method =
	compiler_driver_->GetCompiledMethod(MethodReference(&dex_file,
	method->GetDexMethodIndex()));
	}
	if (compiled_method != nullptr) {
	const std::vector<uint8_t>* code = compiled_method->GetQuickCode();
	const void* code_ptr;
	if (code != nullptr) {
	uint32_t code_size = code->size();
	CHECK_NE(0u, code_size);
	const std::vector<uint8_t>& vmap_table = compiled_method->GetVmapTable();
	uint32_t vmap_table_offset = vmap_table.empty() ? 0u
	: sizeof(OatQuickMethodHeader) + vmap_table.size();
	const std::vector<uint8_t>& mapping_table = compiled_method->GetMappingTable();
	uint32_t mapping_table_offset = mapping_table.empty() ? 0u
	: sizeof(OatQuickMethodHeader) + vmap_table.size() + mapping_table.size();
	OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset,
	compiled_method->GetFrameSizeInBytes(),
	compiled_method->GetCoreSpillMask(),
	compiled_method->GetFpSpillMask(), code_size);

	header_code_and_maps_chunks_.push_back(std::vector<uint8_t>());
	std::vector<uint8_t>* chunk = &header_code_and_maps_chunks_.back();
	size_t size = sizeof(method_header) + code_size + vmap_table.size() + mapping_table.size();
	size_t code_offset = compiled_method->AlignCode(size - code_size);
	size_t padding = code_offset - (size - code_size);
	chunk->reserve(padding + size);
	chunk->resize(sizeof(method_header));
	memcpy(&(*chunk)[0], &method_header, sizeof(method_header));
	chunk->insert(chunk->begin(), vmap_table.begin(), vmap_table.end());
	chunk->insert(chunk->begin(), mapping_table.begin(), mapping_table.end());
	chunk->insert(chunk->begin(), padding, 0);
	chunk->insert(chunk->end(), code->begin(), code->end());
	CHECK_EQ(padding + size, chunk->size());
	code_ptr = &(*chunk)[code_offset];
	} else {
	code = compiled_method->GetPortableCode();
	code_ptr = &(*code)[0];
	}
	MakeExecutable(code_ptr, code->size());
	const void* method_code = CompiledMethod::CodePointer(code_ptr,
	compiled_method->GetInstructionSet());
	LOG(INFO) << "MakeExecutable " << PrettyMethod(method) << " code=" << method_code;
	OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
	oat_method.LinkMethod(method);
	method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
	} else {
	// No code? You must mean to go into the interpreter.
	// Or the generic JNI...
	if (!method->IsNative()) {
	const void* method_code = kUsePortableCompiler ? GetPortableToInterpreterBridge()
	: GetQuickToInterpreterBridge();
	OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
	oat_method.LinkMethod(method);
	method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge);
	} else {
	const void* method_code = reinterpret_cast<void*>(art_quick_generic_jni_trampoline);

	OatFile::OatMethod oat_method = CreateOatMethod(method_code, nullptr);
	oat_method.LinkMethod(method);
	method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
	}
	}
	// Create bridges to transition between different kinds of compiled bridge.
	if (method->GetEntryPointFromPortableCompiledCode() == nullptr) {
	method->SetEntryPointFromPortableCompiledCode(GetPortableToQuickBridge());
	} else {
	CHECK(method->GetEntryPointFromQuickCompiledCode() == nullptr);
	method->SetEntryPointFromQuickCompiledCode(GetQuickToPortableBridge());
	method->SetIsPortableCompiled();
	}
	}

	void CommonCompilerTest::MakeExecutable(const void* code_start, size_t code_length) {
	CHECK(code_start != nullptr);
	CHECK_NE(code_length, 0U);
	uintptr_t data = reinterpret_cast<uintptr_t>(code_start);
	uintptr_t base = RoundDown(data, kPageSize);
	uintptr_t limit = RoundUp(data + code_length, kPageSize);
	uintptr_t len = limit - base;
	int result = mprotect(reinterpret_cast<void*>(base), len, PROT_READ \| PROT_WRITE \| PROT_EXEC);
	CHECK_EQ(result, 0);

	// Flush instruction cache
	// Only uses __builtin___clear_cache if GCC >= 4.3.3
	#if GCC_VERSION >= 40303
	__builtin___clear_cache(reinterpret_cast<void>(base), reinterpret_cast<void>(base + len));
	#else
	// Only warn if not Intel as Intel doesn't have cache flush instructions.
	#if !defined(__i386__) && !defined(__x86_64__)
	LOG(WARNING) << "UNIMPLEMENTED: cache flush";
	#endif
	#endif
	}

	void CommonCompilerTest::MakeExecutable(mirror::ClassLoader* class_loader, const char* class_name) {
	std::string class_descriptor(DotToDescriptor(class_name));
	Thread* self = Thread::Current();
	StackHandleScope<1> hs(self);
	Handle<mirror::ClassLoader> loader(hs.NewHandle(class_loader));
	mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), loader);
	CHECK(klass != nullptr) << "Class not found " << class_name;
	for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
	MakeExecutable(klass->GetDirectMethod(i));
	}
	for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
	MakeExecutable(klass->GetVirtualMethod(i));
	}
	}

	void CommonCompilerTest::SetUp() {
	CommonRuntimeTest::SetUp();
	{
	ScopedObjectAccess soa(Thread::Current());

	InstructionSet instruction_set = kRuntimeISA;

	// Take the default set of instruction features from the build.
	InstructionSetFeatures instruction_set_features =
	ParseFeatureList(Runtime::GetDefaultInstructionSetFeatures());

	#if defined(__arm__)
	InstructionSetFeatures runtime_features = GuessInstructionFeatures();

	// for ARM, do a runtime check to make sure that the features we are passed from
	// the build match the features we actually determine at runtime.
	ASSERT_LE(instruction_set_features, runtime_features);
	#endif

	runtime_->SetInstructionSet(instruction_set);
	for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
	Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
	if (!runtime_->HasCalleeSaveMethod(type)) {
	runtime_->SetCalleeSaveMethod(
	runtime_->CreateCalleeSaveMethod(type), type);
	}
	}

	// TODO: make selectable
	Compiler::Kind compiler_kind
	= (kUsePortableCompiler) ? Compiler::kPortable : Compiler::kQuick;
	timer_.reset(new CumulativeLogger("Compilation times"));
	compiler_driver_.reset(new CompilerDriver(compiler_options_.get(),
	verification_results_.get(),
	method_inliner_map_.get(),
	compiler_kind, instruction_set,
	instruction_set_features,
	true, new std::set<std::string>,
	2, true, true, timer_.get()));
	}
	// We typically don't generate an image in unit tests, disable this optimization by default.
	compiler_driver_->SetSupportBootImageFixup(false);
	}

	void CommonCompilerTest::SetUpRuntimeOptions(RuntimeOptions* options) {
	CommonRuntimeTest::SetUpRuntimeOptions(options);

	compiler_options_.reset(new CompilerOptions);
	verification_results_.reset(new VerificationResults(compiler_options_.get()));
	method_inliner_map_.reset(new DexFileToMethodInlinerMap);
	callbacks_.reset(new QuickCompilerCallbacks(verification_results_.get(),
	method_inliner_map_.get()));
	options->push_back(std::make_pair("compilercallbacks", callbacks_.get()));
	}

	void CommonCompilerTest::TearDown() {
	timer_.reset();
	compiler_driver_.reset();
	callbacks_.reset();
	method_inliner_map_.reset();
	verification_results_.reset();
	compiler_options_.reset();

	CommonRuntimeTest::TearDown();
	}

	void CommonCompilerTest::CompileClass(mirror::ClassLoader* class_loader, const char* class_name) {
	std::string class_descriptor(DotToDescriptor(class_name));
	Thread* self = Thread::Current();
	StackHandleScope<1> hs(self);
	Handle<mirror::ClassLoader> loader(hs.NewHandle(class_loader));
	mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), loader);
	CHECK(klass != nullptr) << "Class not found " << class_name;
	for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
	CompileMethod(klass->GetDirectMethod(i));
	}
	for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
	CompileMethod(klass->GetVirtualMethod(i));
	}
	}

	void CommonCompilerTest::CompileMethod(mirror::ArtMethod* method) {
	CHECK(method != nullptr);
	TimingLogger timings("CommonTest::CompileMethod", false, false);
	TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
	compiler_driver_->CompileOne(method, &timings);
	TimingLogger::ScopedTiming t2("MakeExecutable", &timings);
	MakeExecutable(method);
	}

	void CommonCompilerTest::CompileDirectMethod(Handle<mirror::ClassLoader> class_loader,
	const char* class_name, const char* method_name,
	const char* signature) {
	std::string class_descriptor(DotToDescriptor(class_name));
	Thread* self = Thread::Current();
	mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), class_loader);
	CHECK(klass != nullptr) << "Class not found " << class_name;
	mirror::ArtMethod* method = klass->FindDirectMethod(method_name, signature);
	CHECK(method != nullptr) << "Direct method not found: "
	<< class_name << "." << method_name << signature;
	CompileMethod(method);
	}

	void CommonCompilerTest::CompileVirtualMethod(Handle<mirror::ClassLoader> class_loader,
	const char* class_name, const char* method_name,
	const char* signature) {
	std::string class_descriptor(DotToDescriptor(class_name));
	Thread* self = Thread::Current();
	mirror::Class* klass = class_linker_->FindClass(self, class_descriptor.c_str(), class_loader);
	CHECK(klass != nullptr) << "Class not found " << class_name;
	mirror::ArtMethod* method = klass->FindVirtualMethod(method_name, signature);
	CHECK(method != NULL) << "Virtual method not found: "
	<< class_name << "." << method_name << signature;
	CompileMethod(method);
	}

	void CommonCompilerTest::ReserveImageSpace() {
	// Reserve where the image will be loaded up front so that other parts of test set up don't
	// accidentally end up colliding with the fixed memory address when we need to load the image.
	std::string error_msg;
	image_reservation_.reset(MemMap::MapAnonymous("image reservation",
	reinterpret_cast<byte*>(ART_BASE_ADDRESS),
	(size_t)100 * 1024 * 1024, // 100MB
	PROT_NONE,
	false /* no need for 4gb flag with fixed mmap*/,
	&error_msg));
	CHECK(image_reservation_.get() != nullptr) << error_msg;
	}

	void CommonCompilerTest::UnreserveImageSpace() {
	image_reservation_.reset();
	}

	} // namespace art