Tue, 27 Nov 2012 12:48:52 -0800
8003868: fix shark for latest HotSpot and LLVM
Reviewed-by: twisti
Contributed-by: Roman Kennke <rkennke@redhat.com>
1 /*
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3 * Copyright 2008, 2009, 2010, 2011 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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8 * published by the Free Software Foundation.
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24 */
26 #include "precompiled.hpp"
27 #include "ci/ciEnv.hpp"
28 #include "ci/ciMethod.hpp"
29 #include "code/debugInfoRec.hpp"
30 #include "code/dependencies.hpp"
31 #include "code/exceptionHandlerTable.hpp"
32 #include "code/oopRecorder.hpp"
33 #include "compiler/abstractCompiler.hpp"
34 #include "compiler/oopMap.hpp"
35 #include "shark/llvmHeaders.hpp"
36 #include "shark/sharkBuilder.hpp"
37 #include "shark/sharkCodeBuffer.hpp"
38 #include "shark/sharkCompiler.hpp"
39 #include "shark/sharkContext.hpp"
40 #include "shark/sharkEntry.hpp"
41 #include "shark/sharkFunction.hpp"
42 #include "shark/sharkMemoryManager.hpp"
43 #include "shark/sharkNativeWrapper.hpp"
44 #include "shark/shark_globals.hpp"
45 #include "utilities/debug.hpp"
47 #include <fnmatch.h>
49 using namespace llvm;
51 namespace {
52 cl::opt<std::string>
53 MCPU("mcpu");
55 cl::list<std::string>
56 MAttrs("mattr",
57 cl::CommaSeparated);
58 }
60 SharkCompiler::SharkCompiler()
61 : AbstractCompiler() {
62 // Create the lock to protect the memory manager and execution engine
63 _execution_engine_lock = new Monitor(Mutex::leaf, "SharkExecutionEngineLock");
64 MutexLocker locker(execution_engine_lock());
66 // Make LLVM safe for multithreading
67 if (!llvm_start_multithreaded())
68 fatal("llvm_start_multithreaded() failed");
70 // Initialize the native target
71 InitializeNativeTarget();
73 // MCJIT require a native AsmPrinter
74 InitializeNativeTargetAsmPrinter();
76 // Create the two contexts which we'll use
77 _normal_context = new SharkContext("normal");
78 _native_context = new SharkContext("native");
80 // Create the memory manager
81 _memory_manager = new SharkMemoryManager();
83 // Finetune LLVM for the current host CPU.
84 StringMap<bool> Features;
85 bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features);
86 std::string cpu("-mcpu=" + llvm::sys::getHostCPUName());
88 std::vector<const char*> args;
89 args.push_back(""); // program name
90 args.push_back(cpu.c_str());
92 std::string mattr("-mattr=");
93 if(gotCpuFeatures){
94 for(StringMap<bool>::iterator I = Features.begin(),
95 E = Features.end(); I != E; ++I){
96 if(I->second){
97 std::string attr(I->first());
98 mattr+="+"+attr+",";
99 }
100 }
101 args.push_back(mattr.c_str());
102 }
104 args.push_back(0); // terminator
105 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]);
107 // Create the JIT
108 std::string ErrorMsg;
110 EngineBuilder builder(_normal_context->module());
111 builder.setMCPU(MCPU);
112 builder.setMAttrs(MAttrs);
113 builder.setJITMemoryManager(memory_manager());
114 builder.setEngineKind(EngineKind::JIT);
115 builder.setErrorStr(&ErrorMsg);
116 if (! fnmatch(SharkOptimizationLevel, "None", 0)) {
117 tty->print_cr("Shark optimization level set to: None");
118 builder.setOptLevel(llvm::CodeGenOpt::None);
119 } else if (! fnmatch(SharkOptimizationLevel, "Less", 0)) {
120 tty->print_cr("Shark optimization level set to: Less");
121 builder.setOptLevel(llvm::CodeGenOpt::Less);
122 } else if (! fnmatch(SharkOptimizationLevel, "Aggressive", 0)) {
123 tty->print_cr("Shark optimization level set to: Aggressive");
124 builder.setOptLevel(llvm::CodeGenOpt::Aggressive);
125 } // else Default is selected by, well, default :-)
126 _execution_engine = builder.create();
128 if (!execution_engine()) {
129 if (!ErrorMsg.empty())
130 printf("Error while creating Shark JIT: %s\n",ErrorMsg.c_str());
131 else
132 printf("Unknown error while creating Shark JIT\n");
133 exit(1);
134 }
136 execution_engine()->addModule(
137 _native_context->module());
139 // All done
140 mark_initialized();
141 }
143 void SharkCompiler::initialize() {
144 ShouldNotCallThis();
145 }
147 void SharkCompiler::compile_method(ciEnv* env,
148 ciMethod* target,
149 int entry_bci) {
150 assert(is_initialized(), "should be");
151 ResourceMark rm;
152 const char *name = methodname(
153 target->holder()->name()->as_utf8(), target->name()->as_utf8());
155 // Do the typeflow analysis
156 ciTypeFlow *flow;
157 if (entry_bci == InvocationEntryBci)
158 flow = target->get_flow_analysis();
159 else
160 flow = target->get_osr_flow_analysis(entry_bci);
161 if (flow->failing())
162 return;
163 if (SharkPrintTypeflowOf != NULL) {
164 if (!fnmatch(SharkPrintTypeflowOf, name, 0))
165 flow->print_on(tty);
166 }
168 // Create the recorders
169 Arena arena;
170 env->set_oop_recorder(new OopRecorder(&arena));
171 OopMapSet oopmaps;
172 env->set_debug_info(new DebugInformationRecorder(env->oop_recorder()));
173 env->debug_info()->set_oopmaps(&oopmaps);
174 env->set_dependencies(new Dependencies(env));
176 // Create the code buffer and builder
177 CodeBuffer hscb("Shark", 256 * K, 64 * K);
178 hscb.initialize_oop_recorder(env->oop_recorder());
179 MacroAssembler *masm = new MacroAssembler(&hscb);
180 SharkCodeBuffer cb(masm);
181 SharkBuilder builder(&cb);
183 // Emit the entry point
184 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
186 // Build the LLVM IR for the method
187 Function *function = SharkFunction::build(env, &builder, flow, name);
189 // Generate native code. It's unpleasant that we have to drop into
190 // the VM to do this -- it blocks safepoints -- but I can't see any
191 // other way to handle the locking.
192 {
193 ThreadInVMfromNative tiv(JavaThread::current());
194 generate_native_code(entry, function, name);
195 }
197 // Install the method into the VM
198 CodeOffsets offsets;
199 offsets.set_value(CodeOffsets::Deopt, 0);
200 offsets.set_value(CodeOffsets::Exceptions, 0);
201 offsets.set_value(CodeOffsets::Verified_Entry,
202 target->is_static() ? 0 : wordSize);
204 ExceptionHandlerTable handler_table;
205 ImplicitExceptionTable inc_table;
207 env->register_method(target,
208 entry_bci,
209 &offsets,
210 0,
211 &hscb,
212 0,
213 &oopmaps,
214 &handler_table,
215 &inc_table,
216 this,
217 env->comp_level(),
218 false,
219 false);
220 }
222 nmethod* SharkCompiler::generate_native_wrapper(MacroAssembler* masm,
223 methodHandle target,
224 int compile_id,
225 BasicType* arg_types,
226 BasicType return_type) {
227 assert(is_initialized(), "should be");
228 ResourceMark rm;
229 const char *name = methodname(
230 target->klass_name()->as_utf8(), target->name()->as_utf8());
232 // Create the code buffer and builder
233 SharkCodeBuffer cb(masm);
234 SharkBuilder builder(&cb);
236 // Emit the entry point
237 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
239 // Build the LLVM IR for the method
240 SharkNativeWrapper *wrapper = SharkNativeWrapper::build(
241 &builder, target, name, arg_types, return_type);
243 // Generate native code
244 generate_native_code(entry, wrapper->function(), name);
246 // Return the nmethod for installation in the VM
247 return nmethod::new_native_nmethod(target,
248 compile_id,
249 masm->code(),
250 0,
251 0,
252 wrapper->frame_size(),
253 wrapper->receiver_offset(),
254 wrapper->lock_offset(),
255 wrapper->oop_maps());
256 }
258 void SharkCompiler::generate_native_code(SharkEntry* entry,
259 Function* function,
260 const char* name) {
261 // Print the LLVM bitcode, if requested
262 if (SharkPrintBitcodeOf != NULL) {
263 if (!fnmatch(SharkPrintBitcodeOf, name, 0))
264 function->dump();
265 }
267 if (SharkVerifyFunction != NULL) {
268 if (!fnmatch(SharkVerifyFunction, name, 0)) {
269 verifyFunction(*function);
270 }
271 }
273 // Compile to native code
274 address code = NULL;
275 context()->add_function(function);
276 {
277 MutexLocker locker(execution_engine_lock());
278 free_queued_methods();
280 #ifndef NDEBUG
281 #if SHARK_LLVM_VERSION <= 31
282 #define setCurrentDebugType SetCurrentDebugType
283 #endif
284 if (SharkPrintAsmOf != NULL) {
285 if (!fnmatch(SharkPrintAsmOf, name, 0)) {
286 llvm::setCurrentDebugType(X86_ONLY("x86-emitter") NOT_X86("jit"));
287 llvm::DebugFlag = true;
288 }
289 else {
290 llvm::setCurrentDebugType("");
291 llvm::DebugFlag = false;
292 }
293 }
294 #ifdef setCurrentDebugType
295 #undef setCurrentDebugType
296 #endif
297 #endif // !NDEBUG
298 memory_manager()->set_entry_for_function(function, entry);
299 code = (address) execution_engine()->getPointerToFunction(function);
300 }
301 assert(code != NULL, "code must be != NULL");
302 entry->set_entry_point(code);
303 entry->set_function(function);
304 entry->set_context(context());
305 address code_start = entry->code_start();
306 address code_limit = entry->code_limit();
308 // Register generated code for profiling, etc
309 if (JvmtiExport::should_post_dynamic_code_generated())
310 JvmtiExport::post_dynamic_code_generated(name, code_start, code_limit);
312 // Print debug information, if requested
313 if (SharkTraceInstalls) {
314 tty->print_cr(
315 " [%p-%p): %s (%d bytes code)",
316 code_start, code_limit, name, code_limit - code_start);
317 }
318 }
320 void SharkCompiler::free_compiled_method(address code) {
321 // This method may only be called when the VM is at a safepoint.
322 // All _thread_in_vm threads will be waiting for the safepoint to
323 // finish with the exception of the VM thread, so we can consider
324 // ourself the owner of the execution engine lock even though we
325 // can't actually acquire it at this time.
326 assert(Thread::current()->is_Compiler_thread(), "must be called by compiler thread");
327 assert_locked_or_safepoint(CodeCache_lock);
329 SharkEntry *entry = (SharkEntry *) code;
330 entry->context()->push_to_free_queue(entry->function());
331 }
333 void SharkCompiler::free_queued_methods() {
334 // The free queue is protected by the execution engine lock
335 assert(execution_engine_lock()->owned_by_self(), "should be");
337 while (true) {
338 Function *function = context()->pop_from_free_queue();
339 if (function == NULL)
340 break;
342 execution_engine()->freeMachineCodeForFunction(function);
343 function->eraseFromParent();
344 }
345 }
347 const char* SharkCompiler::methodname(const char* klass, const char* method) {
348 char *buf = NEW_RESOURCE_ARRAY(char, strlen(klass) + 2 + strlen(method) + 1);
350 char *dst = buf;
351 for (const char *c = klass; *c; c++) {
352 if (*c == '/')
353 *(dst++) = '.';
354 else
355 *(dst++) = *c;
356 }
357 *(dst++) = ':';
358 *(dst++) = ':';
359 for (const char *c = method; *c; c++) {
360 *(dst++) = *c;
361 }
362 *(dst++) = '\0';
363 return buf;
364 }