1 /*
   2  * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "precompiled.hpp"
  25 #include "asm/codeBuffer.hpp"
  26 #include "code/codeCache.hpp"
  27 #include "compiler/compileBroker.hpp"
  28 #include "compiler/disassembler.hpp"
  29 #include "jvmci/jvmciRuntime.hpp"
  30 #include "jvmci/jvmciCompilerToVM.hpp"
  31 #include "jvmci/jvmciCompiler.hpp"
  32 #include "jvmci/jvmciJavaClasses.hpp"
  33 #include "jvmci/jvmciEnv.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "oops/oop.inline.hpp"
  36 #include "oops/objArrayOop.inline.hpp"
  37 #include "prims/jvm.h"
  38 #include "runtime/biasedLocking.hpp"
  39 #include "runtime/interfaceSupport.hpp"
  40 #include "runtime/reflection.hpp"
  41 #include "runtime/sharedRuntime.hpp"
  42 #include "utilities/debug.hpp"
  43 #include "utilities/defaultStream.hpp"
  44 
  45 #if defined(_MSC_VER)
  46 #define strtoll _strtoi64
  47 #endif
  48 
  49 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
  50 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
  51 bool JVMCIRuntime::_well_known_classes_initialized = false;
  52 const char* JVMCIRuntime::_compiler = NULL;
  53 int JVMCIRuntime::_options_count = 0;
  54 SystemProperty** JVMCIRuntime::_options = NULL;
  55 int JVMCIRuntime::_trivial_prefixes_count = 0;
  56 char** JVMCIRuntime::_trivial_prefixes = NULL;
  57 bool JVMCIRuntime::_shutdown_called = false;
  58 
  59 static const char* OPTION_PREFIX = "jvmci.option.";
  60 static const size_t OPTION_PREFIX_LEN = strlen(OPTION_PREFIX);
  61 
  62 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
  63   if (kind.is_null()) {
  64     THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
  65   }
  66   jchar ch = JavaKind::typeChar(kind);
  67   switch(ch) {
  68     case 'z': return T_BOOLEAN;
  69     case 'b': return T_BYTE;
  70     case 's': return T_SHORT;
  71     case 'c': return T_CHAR;
  72     case 'i': return T_INT;
  73     case 'f': return T_FLOAT;
  74     case 'j': return T_LONG;
  75     case 'd': return T_DOUBLE;
  76     case 'a': return T_OBJECT;
  77     case '-': return T_ILLEGAL;
  78     default:
  79       JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
  80   }
  81 }
  82 
  83 // Simple helper to see if the caller of a runtime stub which
  84 // entered the VM has been deoptimized
  85 
  86 static bool caller_is_deopted() {
  87   JavaThread* thread = JavaThread::current();
  88   RegisterMap reg_map(thread, false);
  89   frame runtime_frame = thread->last_frame();
  90   frame caller_frame = runtime_frame.sender(&reg_map);
  91   assert(caller_frame.is_compiled_frame(), "must be compiled");
  92   return caller_frame.is_deoptimized_frame();
  93 }
  94 
  95 // Stress deoptimization
  96 static void deopt_caller() {
  97   if ( !caller_is_deopted()) {
  98     JavaThread* thread = JavaThread::current();
  99     RegisterMap reg_map(thread, false);
 100     frame runtime_frame = thread->last_frame();
 101     frame caller_frame = runtime_frame.sender(&reg_map);
 102     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 103     assert(caller_is_deopted(), "Must be deoptimized");
 104   }
 105 }
 106 
 107 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
 108   JRT_BLOCK;
 109   assert(klass->is_klass(), "not a class");
 110   instanceKlassHandle h(thread, klass);
 111   h->check_valid_for_instantiation(true, CHECK);
 112   // make sure klass is initialized
 113   h->initialize(CHECK);
 114   // allocate instance and return via TLS
 115   oop obj = h->allocate_instance(CHECK);
 116   thread->set_vm_result(obj);
 117   JRT_BLOCK_END;
 118 
 119   if (ReduceInitialCardMarks) {
 120     new_store_pre_barrier(thread);
 121   }
 122 JRT_END
 123 
 124 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
 125   JRT_BLOCK;
 126   // Note: no handle for klass needed since they are not used
 127   //       anymore after new_objArray() and no GC can happen before.
 128   //       (This may have to change if this code changes!)
 129   assert(array_klass->is_klass(), "not a class");
 130   oop obj;
 131   if (array_klass->is_typeArray_klass()) {
 132     BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
 133     obj = oopFactory::new_typeArray(elt_type, length, CHECK);
 134   } else {
 135     Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
 136     obj = oopFactory::new_objArray(elem_klass, length, CHECK);
 137   }
 138   thread->set_vm_result(obj);
 139   // This is pretty rare but this runtime patch is stressful to deoptimization
 140   // if we deoptimize here so force a deopt to stress the path.
 141   if (DeoptimizeALot) {
 142     static int deopts = 0;
 143     // Alternate between deoptimizing and raising an error (which will also cause a deopt)
 144     if (deopts++ % 2 == 0) {
 145       ResourceMark rm(THREAD);
 146       THROW(vmSymbols::java_lang_OutOfMemoryError());
 147     } else {
 148       deopt_caller();
 149     }
 150   }
 151   JRT_BLOCK_END;
 152 
 153   if (ReduceInitialCardMarks) {
 154     new_store_pre_barrier(thread);
 155   }
 156 JRT_END
 157 
 158 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
 159   // After any safepoint, just before going back to compiled code,
 160   // we inform the GC that we will be doing initializing writes to
 161   // this object in the future without emitting card-marks, so
 162   // GC may take any compensating steps.
 163   // NOTE: Keep this code consistent with GraphKit::store_barrier.
 164 
 165   oop new_obj = thread->vm_result();
 166   if (new_obj == NULL)  return;
 167 
 168   assert(Universe::heap()->can_elide_tlab_store_barriers(),
 169          "compiler must check this first");
 170   // GC may decide to give back a safer copy of new_obj.
 171   new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
 172   thread->set_vm_result(new_obj);
 173 }
 174 
 175 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
 176   assert(klass->is_klass(), "not a class");
 177   assert(rank >= 1, "rank must be nonzero");
 178   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
 179   thread->set_vm_result(obj);
 180 JRT_END
 181 
 182 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
 183   oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
 184   thread->set_vm_result(obj);
 185 JRT_END
 186 
 187 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
 188   instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
 189 
 190   if (klass == NULL) {
 191     ResourceMark rm(THREAD);
 192     THROW(vmSymbols::java_lang_InstantiationException());
 193   }
 194 
 195   // Create new instance (the receiver)
 196   klass->check_valid_for_instantiation(false, CHECK);
 197 
 198   // Make sure klass gets initialized
 199   klass->initialize(CHECK);
 200 
 201   oop obj = klass->allocate_instance(CHECK);
 202   thread->set_vm_result(obj);
 203 JRT_END
 204 
 205 extern void vm_exit(int code);
 206 
 207 // Enter this method from compiled code handler below. This is where we transition
 208 // to VM mode. This is done as a helper routine so that the method called directly
 209 // from compiled code does not have to transition to VM. This allows the entry
 210 // method to see if the nmethod that we have just looked up a handler for has
 211 // been deoptimized while we were in the vm. This simplifies the assembly code
 212 // cpu directories.
 213 //
 214 // We are entering here from exception stub (via the entry method below)
 215 // If there is a compiled exception handler in this method, we will continue there;
 216 // otherwise we will unwind the stack and continue at the caller of top frame method
 217 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
 218 // control the area where we can allow a safepoint. After we exit the safepoint area we can
 219 // check to see if the handler we are going to return is now in a nmethod that has
 220 // been deoptimized. If that is the case we return the deopt blob
 221 // unpack_with_exception entry instead. This makes life for the exception blob easier
 222 // because making that same check and diverting is painful from assembly language.
 223 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
 224   // Reset method handle flag.
 225   thread->set_is_method_handle_return(false);
 226 
 227   Handle exception(thread, ex);
 228   nm = CodeCache::find_nmethod(pc);
 229   assert(nm != NULL, "this is not a compiled method");
 230   // Adjust the pc as needed/
 231   if (nm->is_deopt_pc(pc)) {
 232     RegisterMap map(thread, false);
 233     frame exception_frame = thread->last_frame().sender(&map);
 234     // if the frame isn't deopted then pc must not correspond to the caller of last_frame
 235     assert(exception_frame.is_deoptimized_frame(), "must be deopted");
 236     pc = exception_frame.pc();
 237   }
 238 #ifdef ASSERT
 239   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
 240   assert(exception->is_oop(), "just checking");
 241   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
 242   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
 243     if (ExitVMOnVerifyError) vm_exit(-1);
 244     ShouldNotReachHere();
 245   }
 246 #endif
 247 
 248   // Check the stack guard pages and reenable them if necessary and there is
 249   // enough space on the stack to do so.  Use fast exceptions only if the guard
 250   // pages are enabled.
 251   bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
 252   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
 253 
 254   if (JvmtiExport::can_post_on_exceptions()) {
 255     // To ensure correct notification of exception catches and throws
 256     // we have to deoptimize here.  If we attempted to notify the
 257     // catches and throws during this exception lookup it's possible
 258     // we could deoptimize on the way out of the VM and end back in
 259     // the interpreter at the throw site.  This would result in double
 260     // notifications since the interpreter would also notify about
 261     // these same catches and throws as it unwound the frame.
 262 
 263     RegisterMap reg_map(thread);
 264     frame stub_frame = thread->last_frame();
 265     frame caller_frame = stub_frame.sender(&reg_map);
 266 
 267     // We don't really want to deoptimize the nmethod itself since we
 268     // can actually continue in the exception handler ourselves but I
 269     // don't see an easy way to have the desired effect.
 270     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 271     assert(caller_is_deopted(), "Must be deoptimized");
 272 
 273     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 274   }
 275 
 276   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
 277   if (guard_pages_enabled) {
 278     address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
 279     if (fast_continuation != NULL) {
 280       // Set flag if return address is a method handle call site.
 281       thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
 282       return fast_continuation;
 283     }
 284   }
 285 
 286   // If the stack guard pages are enabled, check whether there is a handler in
 287   // the current method.  Otherwise (guard pages disabled), force an unwind and
 288   // skip the exception cache update (i.e., just leave continuation==NULL).
 289   address continuation = NULL;
 290   if (guard_pages_enabled) {
 291 
 292     // New exception handling mechanism can support inlined methods
 293     // with exception handlers since the mappings are from PC to PC
 294 
 295     // debugging support
 296     // tracing
 297     if (TraceExceptions) {
 298       ttyLocker ttyl;
 299       ResourceMark rm;
 300       tty->print_cr("Exception <%s> (" INTPTR_FORMAT ") thrown in compiled method <%s> at PC " INTPTR_FORMAT " for thread " INTPTR_FORMAT "",
 301                     exception->print_value_string(), p2i((address)exception()), nm->method()->print_value_string(), p2i(pc), p2i(thread));
 302     }
 303     // for AbortVMOnException flag
 304     NOT_PRODUCT(Exceptions::debug_check_abort(exception));
 305 
 306     // Clear out the exception oop and pc since looking up an
 307     // exception handler can cause class loading, which might throw an
 308     // exception and those fields are expected to be clear during
 309     // normal bytecode execution.
 310     thread->clear_exception_oop_and_pc();
 311 
 312     continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
 313     // If an exception was thrown during exception dispatch, the exception oop may have changed
 314     thread->set_exception_oop(exception());
 315     thread->set_exception_pc(pc);
 316 
 317     // the exception cache is used only by non-implicit exceptions
 318     if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) {
 319       nm->add_handler_for_exception_and_pc(exception, pc, continuation);
 320     }
 321   }
 322 
 323   // Set flag if return address is a method handle call site.
 324   thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
 325 
 326   if (TraceExceptions) {
 327     ttyLocker ttyl;
 328     ResourceMark rm;
 329     tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,
 330                   p2i(thread), p2i(continuation), p2i(pc));
 331   }
 332 
 333   return continuation;
 334 JRT_END
 335 
 336 // Enter this method from compiled code only if there is a Java exception handler
 337 // in the method handling the exception.
 338 // We are entering here from exception stub. We don't do a normal VM transition here.
 339 // We do it in a helper. This is so we can check to see if the nmethod we have just
 340 // searched for an exception handler has been deoptimized in the meantime.
 341 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
 342   oop exception = thread->exception_oop();
 343   address pc = thread->exception_pc();
 344   // Still in Java mode
 345   DEBUG_ONLY(ResetNoHandleMark rnhm);
 346   nmethod* nm = NULL;
 347   address continuation = NULL;
 348   {
 349     // Enter VM mode by calling the helper
 350     ResetNoHandleMark rnhm;
 351     continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
 352   }
 353   // Back in JAVA, use no oops DON'T safepoint
 354 
 355   // Now check to see if the compiled method we were called from is now deoptimized.
 356   // If so we must return to the deopt blob and deoptimize the nmethod
 357   if (nm != NULL && caller_is_deopted()) {
 358     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 359   }
 360 
 361   assert(continuation != NULL, "no handler found");
 362   return continuation;
 363 }
 364 
 365 JRT_ENTRY(void, JVMCIRuntime::create_null_exception(JavaThread* thread))
 366   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
 367   thread->set_vm_result(PENDING_EXCEPTION);
 368   CLEAR_PENDING_EXCEPTION;
 369 JRT_END
 370 
 371 JRT_ENTRY(void, JVMCIRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index))
 372   char message[jintAsStringSize];
 373   sprintf(message, "%d", index);
 374   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
 375   thread->set_vm_result(PENDING_EXCEPTION);
 376   CLEAR_PENDING_EXCEPTION;
 377 JRT_END
 378 
 379 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 380   IF_TRACE_jvmci_3 {
 381     char type[O_BUFLEN];
 382     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 383     markOop mark = obj->mark();
 384     TRACE_jvmci_3("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(mark), p2i(lock));
 385     tty->flush();
 386   }
 387 #ifdef ASSERT
 388   if (PrintBiasedLockingStatistics) {
 389     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
 390   }
 391 #endif
 392   Handle h_obj(thread, obj);
 393   assert(h_obj()->is_oop(), "must be NULL or an object");
 394   if (UseBiasedLocking) {
 395     // Retry fast entry if bias is revoked to avoid unnecessary inflation
 396     ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
 397   } else {
 398     if (JVMCIUseFastLocking) {
 399       // When using fast locking, the compiled code has already tried the fast case
 400       ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
 401     } else {
 402       ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
 403     }
 404   }
 405   TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
 406 JRT_END
 407 
 408 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 409   assert(thread == JavaThread::current(), "threads must correspond");
 410   assert(thread->last_Java_sp(), "last_Java_sp must be set");
 411   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
 412   EXCEPTION_MARK;
 413 
 414 #ifdef DEBUG
 415   if (!obj->is_oop()) {
 416     ResetNoHandleMark rhm;
 417     nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
 418     if (method != NULL) {
 419       tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
 420     }
 421     thread->print_stack_on(tty);
 422     assert(false, "invalid lock object pointer dected");
 423   }
 424 #endif
 425 
 426   if (JVMCIUseFastLocking) {
 427     // When using fast locking, the compiled code has already tried the fast case
 428     ObjectSynchronizer::slow_exit(obj, lock, THREAD);
 429   } else {
 430     ObjectSynchronizer::fast_exit(obj, lock, THREAD);
 431   }
 432   IF_TRACE_jvmci_3 {
 433     char type[O_BUFLEN];
 434     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 435     TRACE_jvmci_3("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(obj->mark()), p2i(lock));
 436     tty->flush();
 437   }
 438 JRT_END
 439 
 440 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
 441   ttyLocker ttyl;
 442 
 443   if (obj == NULL) {
 444     tty->print("NULL");
 445   } else if (obj->is_oop_or_null(true) && (!as_string || !java_lang_String::is_instance(obj))) {
 446     if (obj->is_oop_or_null(true)) {
 447       char buf[O_BUFLEN];
 448       tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
 449     } else {
 450       tty->print(INTPTR_FORMAT, p2i(obj));
 451     }
 452   } else {
 453     ResourceMark rm;
 454     assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
 455     char *buf = java_lang_String::as_utf8_string(obj);
 456     tty->print_raw(buf);
 457   }
 458   if (newline) {
 459     tty->cr();
 460   }
 461 JRT_END
 462 
 463 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
 464   thread->satb_mark_queue().enqueue(obj);
 465 JRT_END
 466 
 467 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
 468   thread->dirty_card_queue().enqueue(card_addr);
 469 JRT_END
 470 
 471 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
 472   bool ret = true;
 473   if(!Universe::heap()->is_in_closed_subset(parent)) {
 474     tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
 475     parent->print();
 476     ret=false;
 477   }
 478   if(!Universe::heap()->is_in_closed_subset(child)) {
 479     tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
 480     child->print();
 481     ret=false;
 482   }
 483   return (jint)ret;
 484 JRT_END
 485 
 486 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
 487   ResourceMark rm;
 488   const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
 489   char *detail_msg = NULL;
 490   if (format != 0L) {
 491     const char* buf = (char*) (address) format;
 492     size_t detail_msg_length = strlen(buf) * 2;
 493     detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
 494     jio_snprintf(detail_msg, detail_msg_length, buf, value);
 495     report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
 496   } else {
 497     report_vm_error(__FILE__, __LINE__, error_msg);
 498   }
 499 JRT_END
 500 
 501 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
 502   oop exception = thread->exception_oop();
 503   assert(exception != NULL, "npe");
 504   thread->set_exception_oop(NULL);
 505   thread->set_exception_pc(0);
 506   return exception;
 507 JRT_END
 508 
 509 PRAGMA_DIAG_PUSH
 510 PRAGMA_FORMAT_NONLITERAL_IGNORED
 511 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
 512   ResourceMark rm;
 513   assert(format != NULL && java_lang_String::is_instance(format), "must be");
 514   char *buf = java_lang_String::as_utf8_string(format);
 515   tty->print((const char*)buf, v1, v2, v3);
 516 JRT_END
 517 PRAGMA_DIAG_POP
 518 
 519 static void decipher(jlong v, bool ignoreZero) {
 520   if (v != 0 || !ignoreZero) {
 521     void* p = (void *)(address) v;
 522     CodeBlob* cb = CodeCache::find_blob(p);
 523     if (cb) {
 524       if (cb->is_nmethod()) {
 525         char buf[O_BUFLEN];
 526         tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin()));
 527         return;
 528       }
 529       cb->print_value_on(tty);
 530       return;
 531     }
 532     if (Universe::heap()->is_in(p)) {
 533       oop obj = oop(p);
 534       obj->print_value_on(tty);
 535       return;
 536     }
 537     tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
 538   }
 539 }
 540 
 541 PRAGMA_DIAG_PUSH
 542 PRAGMA_FORMAT_NONLITERAL_IGNORED
 543 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
 544   ResourceMark rm;
 545   const char *buf = (const char*) (address) format;
 546   if (vmError) {
 547     if (buf != NULL) {
 548       fatal(buf, v1, v2, v3);
 549     } else {
 550       fatal("<anonymous error>");
 551     }
 552   } else if (buf != NULL) {
 553     tty->print(buf, v1, v2, v3);
 554   } else {
 555     assert(v2 == 0, "v2 != 0");
 556     assert(v3 == 0, "v3 != 0");
 557     decipher(v1, false);
 558   }
 559 JRT_END
 560 PRAGMA_DIAG_POP
 561 
 562 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
 563   union {
 564       jlong l;
 565       jdouble d;
 566       jfloat f;
 567   } uu;
 568   uu.l = value;
 569   switch (typeChar) {
 570     case 'z': tty->print(value == 0 ? "false" : "true"); break;
 571     case 'b': tty->print("%d", (jbyte) value); break;
 572     case 'c': tty->print("%c", (jchar) value); break;
 573     case 's': tty->print("%d", (jshort) value); break;
 574     case 'i': tty->print("%d", (jint) value); break;
 575     case 'f': tty->print("%f", uu.f); break;
 576     case 'j': tty->print(JLONG_FORMAT, value); break;
 577     case 'd': tty->print("%lf", uu.d); break;
 578     default: assert(false, "unknown typeChar"); break;
 579   }
 580   if (newline) {
 581     tty->cr();
 582   }
 583 JRT_END
 584 
 585 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
 586   return (jint) obj->identity_hash();
 587 JRT_END
 588 
 589 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
 590   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
 591   // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
 592   Handle receiverHandle(thread, receiver);
 593   MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
 594   JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
 595   if (receiverThread == NULL) {
 596     // The other thread may exit during this process, which is ok so return false.
 597     return JNI_FALSE;
 598   } else {
 599     return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
 600   }
 601 JRT_END
 602 
 603 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
 604   deopt_caller();
 605   return value;
 606 JRT_END
 607 
 608 // private static JVMCIRuntime JVMCI.initializeRuntime()
 609 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
 610   if (!EnableJVMCI) {
 611     THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
 612   }
 613   JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
 614   jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
 615   return ret;
 616 JVM_END
 617 
 618 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
 619   guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
 620 
 621   TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
 622   KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
 623   TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
 624   TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
 625   JavaValue result(T_OBJECT);
 626   if (args == NULL) {
 627     JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
 628   } else {
 629     JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
 630   }
 631   return Handle((oop)result.get_jobject());
 632 }
 633 
 634 static bool jvmci_options_file_exists() {
 635   const char* home = Arguments::get_java_home();
 636   size_t path_len = strlen(home) + strlen("/lib/jvmci.options") + 1;
 637   char path[JVM_MAXPATHLEN];
 638   char sep = os::file_separator()[0];
 639   jio_snprintf(path, JVM_MAXPATHLEN, "%s%clib%cjvmci.options", home, sep, sep);
 640   struct stat st;
 641   return os::stat(path, &st) == 0;
 642 }
 643 
 644 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
 645   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 646 #ifdef ASSERT
 647     // This should only be called in the context of the JVMCI class being initialized
 648     TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);
 649     Klass* k = SystemDictionary::resolve_or_null(name, CHECK);
 650     instanceKlassHandle klass = InstanceKlass::cast(k);
 651     assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
 652            "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
 653 #endif
 654 
 655     bool parseOptionsFile = jvmci_options_file_exists();
 656     if (_options != NULL || parseOptionsFile) {
 657       JavaCallArguments args;
 658       objArrayOop options;
 659       if (_options != NULL) {
 660         options = oopFactory::new_objArray(SystemDictionary::String_klass(), _options_count * 2, CHECK);
 661         for (int i = 0; i < _options_count; i++) {
 662           SystemProperty* prop = _options[i];
 663           oop name = java_lang_String::create_oop_from_str(prop->key() + OPTION_PREFIX_LEN, CHECK);
 664           const char* prop_value = prop->value() != NULL ? prop->value() : "";
 665           oop value = java_lang_String::create_oop_from_str(prop_value, CHECK);
 666           options->obj_at_put(i * 2, name);
 667           options->obj_at_put((i * 2) + 1, value);
 668         }
 669       } else {
 670         options = NULL;
 671       }
 672       args.push_oop(options);
 673       args.push_int(parseOptionsFile);
 674       callStatic("jdk/vm/ci/options/OptionsParser",
 675                  "parseOptionsFromVM",
 676                  "([Ljava/lang/String;Z)Ljava/lang/Boolean;", &args, CHECK);
 677     }
 678 
 679     if (_compiler != NULL) {
 680       JavaCallArguments args;
 681       oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);
 682       args.push_oop(compiler);
 683       callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",
 684                  "selectCompiler",
 685                  "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);
 686     }
 687 
 688     Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
 689                                "runtime",
 690                                "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
 691     objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
 692     if (trivial_prefixes != NULL) {
 693       char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
 694       for (int i = 0; i < trivial_prefixes->length(); i++) {
 695         oop str = trivial_prefixes->obj_at(i);
 696         if (str == NULL) {
 697           THROW(vmSymbols::java_lang_NullPointerException());
 698         } else {
 699           prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
 700         }
 701       }
 702       _trivial_prefixes = prefixes;
 703       _trivial_prefixes_count = trivial_prefixes->length();
 704     }
 705     _HotSpotJVMCIRuntime_initialized = true;
 706     _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
 707   }
 708 }
 709 
 710 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
 711   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 712     callStatic("jdk/vm/ci/runtime/JVMCI",
 713                "getRuntime",
 714                "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
 715   }
 716   assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
 717 }
 718 
 719 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
 720   if (JVMCIRuntime::_well_known_classes_initialized == false) {
 721     SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
 722     SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
 723     JVMCIJavaClasses::compute_offsets(CHECK);
 724     JVMCIRuntime::_well_known_classes_initialized = true;
 725   }
 726 }
 727 
 728 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
 729   // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
 730   // the SystemDictionary well known classes should ensure the other
 731   // classes have already been loaded, so make sure their order in the
 732   // table enforces that.
 733   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
 734          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 735   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
 736          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 737   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
 738          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 739 
 740   if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
 741       !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
 742     // Nothing could be registered yet
 743     return;
 744   }
 745 
 746   // WeakReference<HotSpotJVMCIMetaAccessContext>[]
 747   objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
 748   if (allContexts == NULL) {
 749     return;
 750   }
 751 
 752   // These must be loaded at this point but the linking state doesn't matter.
 753   assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
 754   assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
 755   assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
 756 
 757   for (int i = 0; i < allContexts->length(); i++) {
 758     oop ref = allContexts->obj_at(i);
 759     if (ref != NULL) {
 760       oop referent = java_lang_ref_Reference::referent(ref);
 761       if (referent != NULL) {
 762         // Chunked Object[] with last element pointing to next chunk
 763         objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
 764         while (metadataRoots != NULL) {
 765           for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
 766             oop reference = metadataRoots->obj_at(typeIndex);
 767             if (reference == NULL) {
 768               continue;
 769             }
 770             oop metadataRoot = java_lang_ref_Reference::referent(reference);
 771             if (metadataRoot == NULL) {
 772               continue;
 773             }
 774             if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
 775               Method* method = CompilerToVM::asMethod(metadataRoot);
 776               f(method);
 777             } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
 778               ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
 779               f(constantPool);
 780             } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
 781               Klass* klass = CompilerToVM::asKlass(metadataRoot);
 782               f(klass);
 783             } else {
 784               metadataRoot->print();
 785               ShouldNotReachHere();
 786             }
 787           }
 788           metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
 789           assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
 790         }
 791       }
 792     }
 793   }
 794 }
 795 
 796 // private static void CompilerToVM.registerNatives()
 797 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
 798   if (!EnableJVMCI) {
 799     THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
 800   }
 801 
 802 #ifdef _LP64
 803 #ifndef TARGET_ARCH_sparc
 804   uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
 805   uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
 806   guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
 807 #endif // TARGET_ARCH_sparc
 808 #else
 809   fatal("check TLAB allocation code for address space conflicts");
 810 #endif
 811 
 812   JVMCIRuntime::initialize_well_known_classes(CHECK);
 813 
 814   {
 815     ThreadToNativeFromVM trans(thread);
 816 
 817     // Ensure _non_oop_bits is initialized
 818     Universe::non_oop_word();
 819 
 820     env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
 821   }
 822 JVM_END
 823 
 824 /**
 825  * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.
 826  * The line must match the regular expression "[^=]+=.*". That is one or more
 827  * characters other than '=' followed by '=' followed by zero or more characters.
 828  * Everything before the '=' is the property name and everything after '=' is the value.
 829  * Lines that start with '#' are treated as comments and ignored.
 830  * No special processing of whitespace or any escape characters is performed.
 831  * The last definition of a property "wins" (i.e., it overrides all earlier
 832  * definitions of the property).
 833  */
 834 class JVMCIPropertiesFileClosure : public ParseClosure {
 835   SystemProperty** _plist;
 836 public:
 837   JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}
 838   void do_line(char* line) {
 839     if (line[0] == '#') {
 840       // skip comment
 841       return;
 842     }
 843     size_t len = strlen(line);
 844     char* sep = strchr(line, '=');
 845     if (sep == NULL) {
 846       warn_and_abort("invalid format: could not find '=' character");
 847       return;
 848     }
 849     if (sep == line) {
 850       warn_and_abort("invalid format: name cannot be empty");
 851       return;
 852     }
 853     *sep = '\0';
 854     const char* name = line;
 855     char* value = sep + 1;
 856     Arguments::PropertyList_unique_add(_plist, name, value);
 857   }
 858 };
 859 
 860 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {
 861   char jvmciDir[JVM_MAXPATHLEN];
 862   const char* fileSep = os::file_separator();
 863   jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",
 864                Arguments::get_java_home(), fileSep, fileSep, fileSep);
 865   DIR* dir = os::opendir(jvmciDir);
 866   if (dir != NULL) {
 867     struct dirent *entry;
 868     char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
 869     JVMCIPropertiesFileClosure closure(plist);
 870     const unsigned suffix_len = (unsigned)strlen(".properties");
 871     while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {
 872       const char* name = entry->d_name;
 873       if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {
 874         char propertiesFilePath[JVM_MAXPATHLEN];
 875         jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);
 876         JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);
 877       }
 878     }
 879     FREE_C_HEAP_ARRAY(char, dbuf);
 880     os::closedir(dir);
 881   }
 882 }
 883 
 884 #define CHECK_WARN_ABORT_(message) THREAD); \
 885   if (HAS_PENDING_EXCEPTION) { \
 886     warning(message); \
 887     char buf[512]; \
 888     jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
 889     JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
 890     return; \
 891   } \
 892   (void)(0
 893 
 894 void JVMCIRuntime::save_compiler(const char* compiler) {
 895   assert(compiler != NULL, "npe");
 896   assert(_compiler == NULL, "cannot reassign JVMCI compiler");
 897   _compiler = compiler;
 898 }
 899 
 900 void JVMCIRuntime::maybe_print_flags(TRAPS) {
 901   if (_options != NULL) {
 902     for (int i = 0; i < _options_count; i++) {
 903       SystemProperty* p = _options[i];
 904       const char* name = p->key() + OPTION_PREFIX_LEN;
 905       if (strcmp(name, "PrintFlags") == 0 || strcmp(name, "ShowFlags") == 0) {
 906         JVMCIRuntime::initialize_well_known_classes(CHECK);
 907         HandleMark hm;
 908         ResourceMark rm;
 909         JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
 910         return;
 911       }
 912     }
 913   }
 914 }
 915 
 916 void JVMCIRuntime::save_options(SystemProperty* props) {
 917   int count = 0;
 918   SystemProperty* first = NULL;
 919   for (SystemProperty* p = props; p != NULL; p = p->next()) {
 920     if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
 921       if (first == NULL) {
 922         first = p;
 923       }
 924       count++;
 925     }
 926   }
 927   if (count != 0) {
 928     _options_count = count;
 929     _options = NEW_C_HEAP_ARRAY(SystemProperty*, count, mtCompiler);
 930     _options[0] = first;
 931     SystemProperty** insert_pos = _options + 1;
 932     for (SystemProperty* p = first->next(); p != NULL; p = p->next()) {
 933       if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
 934         *insert_pos = p;
 935         insert_pos++;
 936       }
 937     }
 938     assert (insert_pos - _options == count, "must be");
 939   }
 940 }
 941 
 942 void JVMCIRuntime::shutdown(TRAPS) {
 943   if (_HotSpotJVMCIRuntime_instance != NULL) {
 944     _shutdown_called = true;
 945     HandleMark hm(THREAD);
 946     Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 947     JavaValue result(T_VOID);
 948     JavaCallArguments args;
 949     args.push_oop(receiver);
 950     JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 951   }
 952 }
 953 
 954 bool JVMCIRuntime::treat_as_trivial(Method* method) {
 955   if (_HotSpotJVMCIRuntime_initialized) {
 956     oop loader = method->method_holder()->class_loader();
 957     if (loader == NULL) {
 958       for (int i = 0; i < _trivial_prefixes_count; i++) {
 959         if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
 960           return true;
 961         }
 962       }
 963     }
 964   }
 965   return false;
 966 }
 967 
 968 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {
 969   struct stat st;
 970   if (::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file
 971     int file_handle = ::open(path, os::default_file_open_flags(), 0);
 972     if (file_handle != -1) {
 973       char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);
 974       int num_read;
 975       num_read = (int) ::read(file_handle, (char*) buffer, st.st_size);
 976       if (num_read == -1) {
 977         warning("Error reading file %s due to %s", path, strerror(errno));
 978       } else if (num_read != st.st_size) {
 979         warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);
 980       }
 981       ::close(file_handle);
 982       closure->set_filename(path);
 983       if (num_read == st.st_size) {
 984         buffer[num_read] = '\0';
 985 
 986         char* line = buffer;
 987         while (line - buffer < num_read && !closure->is_aborted()) {
 988           // find line end (\r, \n or \r\n)
 989           char* nextline = NULL;
 990           char* cr = strchr(line, '\r');
 991           char* lf = strchr(line, '\n');
 992           if (cr != NULL && lf != NULL) {
 993             char* min = MIN2(cr, lf);
 994             *min = '\0';
 995             if (lf == cr + 1) {
 996               nextline = lf + 1;
 997             } else {
 998               nextline = min + 1;
 999             }
1000           } else if (cr != NULL) {
1001             *cr = '\0';
1002             nextline = cr + 1;
1003           } else if (lf != NULL) {
1004             *lf = '\0';
1005             nextline = lf + 1;
1006           }
1007           // trim left
1008           while (*line == ' ' || *line == '\t') line++;
1009           char* end = line + strlen(line);
1010           // trim right
1011           while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;
1012           *end = '\0';
1013           // skip comments and empty lines
1014           if (*line != '#' && strlen(line) > 0) {
1015             closure->parse_line(line);
1016           }
1017           if (nextline != NULL) {
1018             line = nextline;
1019           } else {
1020             // File without newline at the end
1021             break;
1022           }
1023         }
1024       }
1025       FREE_C_HEAP_ARRAY(char, buffer);
1026     } else {
1027       warning("Error opening file %s due to %s", path, strerror(errno));
1028     }
1029   } else if (warnStatFailure) {
1030     warning("Could not stat file %s due to %s", path, strerror(errno));
1031   }
1032 }