1 /*
2 * Copyright 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "jit.h"
18
19 #include <dlfcn.h>
20
21 #include "art_method-inl.h"
22 #include "entrypoints/runtime_asm_entrypoints.h"
23 #include "interpreter/interpreter.h"
24 #include "jit_code_cache.h"
25 #include "jit_instrumentation.h"
26 #include "runtime.h"
27 #include "runtime_options.h"
28 #include "thread_list.h"
29 #include "utils.h"
30
31 namespace art {
32 namespace jit {
33
CreateFromRuntimeArguments(const RuntimeArgumentMap & options)34 JitOptions* JitOptions::CreateFromRuntimeArguments(const RuntimeArgumentMap& options) {
35 auto* jit_options = new JitOptions;
36 jit_options->use_jit_ = options.GetOrDefault(RuntimeArgumentMap::UseJIT);
37 jit_options->code_cache_capacity_ =
38 options.GetOrDefault(RuntimeArgumentMap::JITCodeCacheCapacity);
39 jit_options->compile_threshold_ =
40 options.GetOrDefault(RuntimeArgumentMap::JITCompileThreshold);
41 jit_options->dump_info_on_shutdown_ =
42 options.Exists(RuntimeArgumentMap::DumpJITInfoOnShutdown);
43 return jit_options;
44 }
45
DumpInfo(std::ostream & os)46 void Jit::DumpInfo(std::ostream& os) {
47 os << "Code cache size=" << PrettySize(code_cache_->CodeCacheSize())
48 << " data cache size=" << PrettySize(code_cache_->DataCacheSize())
49 << " num methods=" << code_cache_->NumMethods()
50 << "\n";
51 cumulative_timings_.Dump(os);
52 }
53
AddTimingLogger(const TimingLogger & logger)54 void Jit::AddTimingLogger(const TimingLogger& logger) {
55 cumulative_timings_.AddLogger(logger);
56 }
57
Jit()58 Jit::Jit()
59 : jit_library_handle_(nullptr), jit_compiler_handle_(nullptr), jit_load_(nullptr),
60 jit_compile_method_(nullptr), dump_info_on_shutdown_(false),
61 cumulative_timings_("JIT timings") {
62 }
63
Create(JitOptions * options,std::string * error_msg)64 Jit* Jit::Create(JitOptions* options, std::string* error_msg) {
65 std::unique_ptr<Jit> jit(new Jit);
66 jit->dump_info_on_shutdown_ = options->DumpJitInfoOnShutdown();
67 if (!jit->LoadCompiler(error_msg)) {
68 return nullptr;
69 }
70 jit->code_cache_.reset(JitCodeCache::Create(options->GetCodeCacheCapacity(), error_msg));
71 if (jit->GetCodeCache() == nullptr) {
72 return nullptr;
73 }
74 LOG(INFO) << "JIT created with code_cache_capacity="
75 << PrettySize(options->GetCodeCacheCapacity())
76 << " compile_threshold=" << options->GetCompileThreshold();
77 return jit.release();
78 }
79
LoadCompiler(std::string * error_msg)80 bool Jit::LoadCompiler(std::string* error_msg) {
81 jit_library_handle_ = dlopen(
82 kIsDebugBuild ? "libartd-compiler.so" : "libart-compiler.so", RTLD_NOW);
83 if (jit_library_handle_ == nullptr) {
84 std::ostringstream oss;
85 oss << "JIT could not load libart-compiler.so: " << dlerror();
86 *error_msg = oss.str();
87 return false;
88 }
89 jit_load_ = reinterpret_cast<void* (*)(CompilerCallbacks**)>(
90 dlsym(jit_library_handle_, "jit_load"));
91 if (jit_load_ == nullptr) {
92 dlclose(jit_library_handle_);
93 *error_msg = "JIT couldn't find jit_load entry point";
94 return false;
95 }
96 jit_unload_ = reinterpret_cast<void (*)(void*)>(
97 dlsym(jit_library_handle_, "jit_unload"));
98 if (jit_unload_ == nullptr) {
99 dlclose(jit_library_handle_);
100 *error_msg = "JIT couldn't find jit_unload entry point";
101 return false;
102 }
103 jit_compile_method_ = reinterpret_cast<bool (*)(void*, ArtMethod*, Thread*)>(
104 dlsym(jit_library_handle_, "jit_compile_method"));
105 if (jit_compile_method_ == nullptr) {
106 dlclose(jit_library_handle_);
107 *error_msg = "JIT couldn't find jit_compile_method entry point";
108 return false;
109 }
110 CompilerCallbacks* callbacks = nullptr;
111 VLOG(jit) << "Calling JitLoad interpreter_only="
112 << Runtime::Current()->GetInstrumentation()->InterpretOnly();
113 jit_compiler_handle_ = (jit_load_)(&callbacks);
114 if (jit_compiler_handle_ == nullptr) {
115 dlclose(jit_library_handle_);
116 *error_msg = "JIT couldn't load compiler";
117 return false;
118 }
119 if (callbacks == nullptr) {
120 dlclose(jit_library_handle_);
121 *error_msg = "JIT compiler callbacks were not set";
122 jit_compiler_handle_ = nullptr;
123 return false;
124 }
125 compiler_callbacks_ = callbacks;
126 return true;
127 }
128
CompileMethod(ArtMethod * method,Thread * self)129 bool Jit::CompileMethod(ArtMethod* method, Thread* self) {
130 DCHECK(!method->IsRuntimeMethod());
131 if (Dbg::IsDebuggerActive() && Dbg::MethodHasAnyBreakpoints(method)) {
132 VLOG(jit) << "JIT not compiling " << PrettyMethod(method) << " due to breakpoint";
133 return false;
134 }
135 const bool result = jit_compile_method_(jit_compiler_handle_, method, self);
136 if (result) {
137 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
138 }
139 return result;
140 }
141
CreateThreadPool()142 void Jit::CreateThreadPool() {
143 CHECK(instrumentation_cache_.get() != nullptr);
144 instrumentation_cache_->CreateThreadPool();
145 }
146
DeleteThreadPool()147 void Jit::DeleteThreadPool() {
148 if (instrumentation_cache_.get() != nullptr) {
149 instrumentation_cache_->DeleteThreadPool();
150 }
151 }
152
~Jit()153 Jit::~Jit() {
154 if (dump_info_on_shutdown_) {
155 DumpInfo(LOG(INFO));
156 }
157 DeleteThreadPool();
158 if (jit_compiler_handle_ != nullptr) {
159 jit_unload_(jit_compiler_handle_);
160 }
161 if (jit_library_handle_ != nullptr) {
162 dlclose(jit_library_handle_);
163 }
164 }
165
CreateInstrumentationCache(size_t compile_threshold)166 void Jit::CreateInstrumentationCache(size_t compile_threshold) {
167 CHECK_GT(compile_threshold, 0U);
168 Runtime* const runtime = Runtime::Current();
169 runtime->GetThreadList()->SuspendAll(__FUNCTION__);
170 // Add Jit interpreter instrumentation, tells the interpreter when to notify the jit to compile
171 // something.
172 instrumentation_cache_.reset(new jit::JitInstrumentationCache(compile_threshold));
173 runtime->GetInstrumentation()->AddListener(
174 new jit::JitInstrumentationListener(instrumentation_cache_.get()),
175 instrumentation::Instrumentation::kMethodEntered |
176 instrumentation::Instrumentation::kBackwardBranch);
177 runtime->GetThreadList()->ResumeAll();
178 }
179
180 } // namespace jit
181 } // namespace art
182