Mercurial > hg > truffle

comparison src/share/vm/shark/sharkCompiler.cpp @ 1692:d2ede61b7a12

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6976186: integrate Shark HotSpot changes Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure. Reviewed-by: kvn, twisti Contributed-by: Gary Benson <gbenson@redhat.com>
author twisti
date Wed, 11 Aug 2010 05:51:21 -0700
parents
children f95d63e2154a
comparison
equal deleted inserted replaced
1691:4a665be40fd3 1692:d2ede61b7a12
1 /*
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009, 2010 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
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 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "incls/_precompiled.incl"
27 #include "incls/_sharkCompiler.cpp.incl"
28
29 #include <fnmatch.h>
30
31 using namespace llvm;
32
33 #if SHARK_LLVM_VERSION >= 27
34 namespace {
35 cl::opt<std::string>
36 MCPU("mcpu");
37
38 cl::list<std::string>
39 MAttrs("mattr",
40 cl::CommaSeparated);
41 }
42 #endif
43
44 SharkCompiler::SharkCompiler()
45 : AbstractCompiler() {
46 // Create the lock to protect the memory manager and execution engine
47 _execution_engine_lock = new Monitor(Mutex::leaf, "SharkExecutionEngineLock");
48 MutexLocker locker(execution_engine_lock());
49
50 // Make LLVM safe for multithreading
51 if (!llvm_start_multithreaded())
52 fatal("llvm_start_multithreaded() failed");
53
54 // Initialize the native target
55 InitializeNativeTarget();
56
57 // Create the two contexts which we'll use
58 _normal_context = new SharkContext("normal");
59 _native_context = new SharkContext("native");
60
61 // Create the memory manager
62 _memory_manager = new SharkMemoryManager();
63
64 #if SHARK_LLVM_VERSION >= 27
65 // Finetune LLVM for the current host CPU.
66 StringMap<bool> Features;
67 bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features);
68 std::string cpu("-mcpu=" + llvm::sys::getHostCPUName());
69
70 std::vector<const char*> args;
71 args.push_back(""); // program name
72 args.push_back(cpu.c_str());
73
74 std::string mattr("-mattr=");
75 if(gotCpuFeatures){
76 for(StringMap<bool>::iterator I = Features.begin(),
77 E = Features.end(); I != E; ++I){
78 if(I->second){
79 std::string attr(I->first());
80 mattr+="+"+attr+",";
81 }
82 }
83 args.push_back(mattr.c_str());
84 }
85
86 args.push_back(0); // terminator
87 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]);
88
89 // Create the JIT
90 std::string ErrorMsg;
91
92 EngineBuilder builder(_normal_context->module());
93 builder.setMCPU(MCPU);
94 builder.setMAttrs(MAttrs);
95 builder.setJITMemoryManager(memory_manager());
96 builder.setEngineKind(EngineKind::JIT);
97 builder.setErrorStr(&ErrorMsg);
98 _execution_engine = builder.create();
99
100 if (!execution_engine()) {
101 if (!ErrorMsg.empty())
102 printf("Error while creating Shark JIT: %s\n",ErrorMsg.c_str());
103 else
104 printf("Unknown error while creating Shark JIT\n");
105 exit(1);
106 }
107
108 execution_engine()->addModule(
109 _native_context->module());
110 #else
111 _execution_engine = ExecutionEngine::createJIT(
112 _normal_context->module_provider(),
113 NULL, memory_manager(), CodeGenOpt::Default);
114 execution_engine()->addModuleProvider(
115 _native_context->module_provider());
116 #endif
117
118 // All done
119 mark_initialized();
120 }
121
122 void SharkCompiler::initialize() {
123 ShouldNotCallThis();
124 }
125
126 void SharkCompiler::compile_method(ciEnv* env,
127 ciMethod* target,
128 int entry_bci) {
129 assert(is_initialized(), "should be");
130 ResourceMark rm;
131 const char *name = methodname(
132 target->holder()->name()->as_utf8(), target->name()->as_utf8());
133
134 // Do the typeflow analysis
135 ciTypeFlow *flow;
136 if (entry_bci == InvocationEntryBci)
137 flow = target->get_flow_analysis();
138 else
139 flow = target->get_osr_flow_analysis(entry_bci);
140 if (flow->failing())
141 return;
142 if (SharkPrintTypeflowOf != NULL) {
143 if (!fnmatch(SharkPrintTypeflowOf, name, 0))
144 flow->print_on(tty);
145 }
146
147 // Create the recorders
148 Arena arena;
149 env->set_oop_recorder(new OopRecorder(&arena));
150 OopMapSet oopmaps;
151 env->set_debug_info(new DebugInformationRecorder(env->oop_recorder()));
152 env->debug_info()->set_oopmaps(&oopmaps);
153 env->set_dependencies(new Dependencies(env));
154
155 // Create the code buffer and builder
156 CodeBuffer hscb("Shark", 256 * K, 64 * K);
157 hscb.initialize_oop_recorder(env->oop_recorder());
158 MacroAssembler *masm = new MacroAssembler(&hscb);
159 SharkCodeBuffer cb(masm);
160 SharkBuilder builder(&cb);
161
162 // Emit the entry point
163 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
164
165 // Build the LLVM IR for the method
166 Function *function = SharkFunction::build(env, &builder, flow, name);
167
168 // Generate native code. It's unpleasant that we have to drop into
169 // the VM to do this -- it blocks safepoints -- but I can't see any
170 // other way to handle the locking.
171 {
172 ThreadInVMfromNative tiv(JavaThread::current());
173 generate_native_code(entry, function, name);
174 }
175
176 // Install the method into the VM
177 CodeOffsets offsets;
178 offsets.set_value(CodeOffsets::Deopt, 0);
179 offsets.set_value(CodeOffsets::Exceptions, 0);
180 offsets.set_value(CodeOffsets::Verified_Entry,
181 target->is_static() ? 0 : wordSize);
182
183 ExceptionHandlerTable handler_table;
184 ImplicitExceptionTable inc_table;
185
186 env->register_method(target,
187 entry_bci,
188 &offsets,
189 0,
190 &hscb,
191 0,
192 &oopmaps,
193 &handler_table,
194 &inc_table,
195 this,
196 env->comp_level(),
197 false,
198 false);
199 }
200
201 nmethod* SharkCompiler::generate_native_wrapper(MacroAssembler* masm,
202 methodHandle target,
203 BasicType* arg_types,
204 BasicType return_type) {
205 assert(is_initialized(), "should be");
206 ResourceMark rm;
207 const char *name = methodname(
208 target->klass_name()->as_utf8(), target->name()->as_utf8());
209
210 // Create the code buffer and builder
211 SharkCodeBuffer cb(masm);
212 SharkBuilder builder(&cb);
213
214 // Emit the entry point
215 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
216
217 // Build the LLVM IR for the method
218 SharkNativeWrapper *wrapper = SharkNativeWrapper::build(
219 &builder, target, name, arg_types, return_type);
220
221 // Generate native code
222 generate_native_code(entry, wrapper->function(), name);
223
224 // Return the nmethod for installation in the VM
225 return nmethod::new_native_nmethod(target,
226 masm->code(),
227 0,
228 0,
229 wrapper->frame_size(),
230 wrapper->receiver_offset(),
231 wrapper->lock_offset(),
232 wrapper->oop_maps());
233 }
234
235 void SharkCompiler::generate_native_code(SharkEntry* entry,
236 Function* function,
237 const char* name) {
238 // Print the LLVM bitcode, if requested
239 if (SharkPrintBitcodeOf != NULL) {
240 if (!fnmatch(SharkPrintBitcodeOf, name, 0))
241 function->dump();
242 }
243
244 // Compile to native code
245 address code = NULL;
246 context()->add_function(function);
247 {
248 MutexLocker locker(execution_engine_lock());
249 free_queued_methods();
250
251 if (SharkPrintAsmOf != NULL) {
252 #if SHARK_LLVM_VERSION >= 27
253 #ifndef NDEBUG
254 if (!fnmatch(SharkPrintAsmOf, name, 0)) {
255 llvm::SetCurrentDebugType(X86_ONLY("x86-emitter") NOT_X86("jit"));
256 llvm::DebugFlag = true;
257 }
258 else {
259 llvm::SetCurrentDebugType("");
260 llvm::DebugFlag = false;
261 }
262 #endif // !NDEBUG
263 #else
264 // NB you need to patch LLVM with http://tinyurl.com/yf3baln for this
265 std::vector<const char*> args;
266 args.push_back(""); // program name
267 if (!fnmatch(SharkPrintAsmOf, name, 0))
268 args.push_back("-debug-only=x86-emitter");
269 else
270 args.push_back("-debug-only=none");
271 args.push_back(0); // terminator
272 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]);
273 #endif // SHARK_LLVM_VERSION
274 }
275 memory_manager()->set_entry_for_function(function, entry);
276 code = (address) execution_engine()->getPointerToFunction(function);
277 }
278 entry->set_entry_point(code);
279 entry->set_function(function);
280 entry->set_context(context());
281 address code_start = entry->code_start();
282 address code_limit = entry->code_limit();
283
284 // Register generated code for profiling, etc
285 if (JvmtiExport::should_post_dynamic_code_generated())
286 JvmtiExport::post_dynamic_code_generated(name, code_start, code_limit);
287
288 // Print debug information, if requested
289 if (SharkTraceInstalls) {
290 tty->print_cr(
291 " [%p-%p): %s (%d bytes code)",
292 code_start, code_limit, name, code_limit - code_start);
293 }
294 }
295
296 void SharkCompiler::free_compiled_method(address code) {
297 // This method may only be called when the VM is at a safepoint.
298 // All _thread_in_vm threads will be waiting for the safepoint to
299 // finish with the exception of the VM thread, so we can consider
300 // ourself the owner of the execution engine lock even though we
301 // can't actually acquire it at this time.
302 assert(Thread::current()->is_VM_thread(), "must be called by VM thread");
303 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
304
305 SharkEntry *entry = (SharkEntry *) code;
306 entry->context()->push_to_free_queue(entry->function());
307 }
308
309 void SharkCompiler::free_queued_methods() {
310 // The free queue is protected by the execution engine lock
311 assert(execution_engine_lock()->owned_by_self(), "should be");
312
313 while (true) {
314 Function *function = context()->pop_from_free_queue();
315 if (function == NULL)
316 break;
317
318 execution_engine()->freeMachineCodeForFunction(function);
319 function->eraseFromParent();
320 }
321 }
322
323 const char* SharkCompiler::methodname(const char* klass, const char* method) {
324 char *buf = NEW_RESOURCE_ARRAY(char, strlen(klass) + 2 + strlen(method) + 1);
325
326 char *dst = buf;
327 for (const char *c = klass; *c; c++) {
328 if (*c == '/')
329 *(dst++) = '.';
330 else
331 *(dst++) = *c;
332 }
333 *(dst++) = ':';
334 *(dst++) = ':';
335 for (const char *c = method; *c; c++) {
336 *(dst++) = *c;
337 }
338 *(dst++) = '\0';
339 return buf;
340 }