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/*
* Copyright (C) 2015 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_options.h"
#include <fstream>
#include <string_view>
#include "android-base/stringprintf.h"
#include "arch/instruction_set.h"
#include "arch/instruction_set_features.h"
#include "art_method-inl.h"
#include "base/runtime_debug.h"
#include "base/string_view_cpp20.h"
#include "base/variant_map.h"
#include "class_linker.h"
#include "cmdline_parser.h"
#include "compiler_options_map-inl.h"
#include "dex/dex_file-inl.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "simple_compiler_options_map.h"
namespace art HIDDEN {
CompilerOptions::CompilerOptions()
: compiler_filter_(CompilerFilter::kDefaultCompilerFilter),
huge_method_threshold_(kDefaultHugeMethodThreshold),
inline_max_code_units_(kUnsetInlineMaxCodeUnits),
instruction_set_(kRuntimeISA == InstructionSet::kArm ? InstructionSet::kThumb2 : kRuntimeISA),
instruction_set_features_(nullptr),
no_inline_from_(),
dex_files_for_oat_file_(),
image_classes_(),
compiler_type_(CompilerType::kAotCompiler),
image_type_(ImageType::kNone),
multi_image_(false),
compile_art_test_(false),
emit_read_barrier_(false),
baseline_(false),
debuggable_(false),
generate_debug_info_(kDefaultGenerateDebugInfo),
generate_mini_debug_info_(kDefaultGenerateMiniDebugInfo),
generate_build_id_(false),
implicit_null_checks_(false),
implicit_so_checks_(true),
implicit_suspend_checks_(false),
compile_pic_(false),
dump_timings_(false),
dump_pass_timings_(false),
dump_stats_(false),
profile_branches_(false),
profile_compilation_info_(nullptr),
verbose_methods_(),
abort_on_hard_verifier_failure_(false),
abort_on_soft_verifier_failure_(false),
init_failure_output_(nullptr),
dump_cfg_file_name_(""),
dump_cfg_append_(false),
force_determinism_(false),
check_linkage_conditions_(false),
crash_on_linkage_violation_(false),
deduplicate_code_(true),
count_hotness_in_compiled_code_(false),
resolve_startup_const_strings_(false),
initialize_app_image_classes_(false),
check_profiled_methods_(ProfileMethodsCheck::kNone),
max_image_block_size_(std::numeric_limits<uint32_t>::max()),
passes_to_run_(nullptr) {
}
CompilerOptions::~CompilerOptions() {
// Everything done by member destructors.
// The definitions of classes forward-declared in the header have now been #included.
}
namespace {
bool kEmitRuntimeReadBarrierChecks = kIsDebugBuild &&
RegisterRuntimeDebugFlag(&kEmitRuntimeReadBarrierChecks);
} // namespace
bool CompilerOptions::EmitRunTimeChecksInDebugMode() const {
// Run-time checks (e.g. Marking Register checks) are only emitted in slow-debug mode.
return kEmitRuntimeReadBarrierChecks;
}
bool CompilerOptions::ParseDumpInitFailures(const std::string& option, std::string* error_msg) {
init_failure_output_.reset(new std::ofstream(option));
if (init_failure_output_.get() == nullptr) {
*error_msg = "Failed to construct std::ofstream";
return false;
} else if (init_failure_output_->fail()) {
*error_msg = android::base::StringPrintf(
"Failed to open %s for writing the initialization failures.", option.c_str());
init_failure_output_.reset();
return false;
}
return true;
}
bool CompilerOptions::ParseCompilerOptions(const std::vector<std::string>& options,
bool ignore_unrecognized,
std::string* error_msg) {
auto parser = CreateSimpleParser(ignore_unrecognized);
CmdlineResult parse_result = parser.Parse(options);
if (!parse_result.IsSuccess()) {
*error_msg = parse_result.GetMessage();
return false;
}
SimpleParseArgumentMap args = parser.ReleaseArgumentsMap();
return ReadCompilerOptions(args, this, error_msg);
}
bool CompilerOptions::IsImageClass(const char* descriptor) const {
// Historical note: We used to hold the set indirectly and there was a distinction between an
// empty set and a null, null meaning to include all classes. However, the distinction has been
// removed; if we don't have a profile, we treat it as an empty set of classes. b/77340429
return image_classes_.find(std::string_view(descriptor)) != image_classes_.end();
}
bool CompilerOptions::IsPreloadedClass(const char* pretty_descriptor) const {
return preloaded_classes_.find(std::string_view(pretty_descriptor)) != preloaded_classes_.end();
}
bool CompilerOptions::ShouldCompileWithClinitCheck(ArtMethod* method) const {
if (method != nullptr &&
Runtime::Current()->IsAotCompiler() &&
method->IsStatic() &&
!method->IsConstructor() &&
// Compiled code for native methods never do a clinit check, so we may put the resolution
// trampoline for native methods. This means that it's possible post zygote fork for the
// entry to be dirtied. We could resolve this by either:
// - Make these methods use the generic JNI entrypoint, but that's not
// desirable for a method that is in the profile.
// - Ensure the declaring class of such native methods are always in the
// preloaded-classes list.
// - Emit the clinit check in the compiled code of native methods.
!method->IsNative()) {
ScopedObjectAccess soa(Thread::Current());
ObjPtr<mirror::Class> cls = method->GetDeclaringClass<kWithoutReadBarrier>();
return cls->IsInBootImageAndNotInPreloadedClasses();
}
return false;
}
} // namespace art
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