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 bool JVMCIRuntime::_shutdown_called = false;

    56 

    57 static const char* OPTION_PREFIX = "jvmci.option.";

    58 static const size_t OPTION_PREFIX_LEN = strlen(OPTION_PREFIX);

    59 

    60 BasicType JVMCIRuntime::kindToBasicType(jchar ch) {

    61   switch(ch) {

    62     case 'z': return T_BOOLEAN;

    63     case 'b': return T_BYTE;

    64     case 's': return T_SHORT;

    65     case 'c': return T_CHAR;

    66     case 'i': return T_INT;

    67     case 'f': return T_FLOAT;

    68     case 'j': return T_LONG;

    69     case 'd': return T_DOUBLE;

    70     case 'a': return T_OBJECT;

    71     case '-': return T_ILLEGAL;

    72     default:

    73       fatal(err_msg("unexpected Kind: %c", ch));

    74       break;

    75   }

    76   return T_ILLEGAL;

    77 }

    78 

    79 // Simple helper to see if the caller of a runtime stub which

    80 // entered the VM has been deoptimized

    81 

    82 static bool caller_is_deopted() {

    83   JavaThread* thread = JavaThread::current();

    84   RegisterMap reg_map(thread, false);

    85   frame runtime_frame = thread->last_frame();

    86   frame caller_frame = runtime_frame.sender(&reg_map);

    87   assert(caller_frame.is_compiled_frame(), "must be compiled");

    88   return caller_frame.is_deoptimized_frame();

    89 }

    90 

    91 // Stress deoptimization

    92 static void deopt_caller() {

    93   if ( !caller_is_deopted()) {

    94     JavaThread* thread = JavaThread::current();

    95     RegisterMap reg_map(thread, false);

    96     frame runtime_frame = thread->last_frame();

    97     frame caller_frame = runtime_frame.sender(&reg_map);

    98     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);

    99     assert(caller_is_deopted(), "Must be deoptimized");

   100   }

   101 }

   102 

   103 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))

   104   JRT_BLOCK;

   105   assert(klass->is_klass(), "not a class");

   106   instanceKlassHandle h(thread, klass);

   107   h->check_valid_for_instantiation(true, CHECK);

   108   // make sure klass is initialized

   109   h->initialize(CHECK);

   110   // allocate instance and return via TLS

   111   oop obj = h->allocate_instance(CHECK);

   112   thread->set_vm_result(obj);

   113   JRT_BLOCK_END;

   114 

   115   if (ReduceInitialCardMarks) {

   116     new_store_pre_barrier(thread);

   117   }

   118 JRT_END

   119 

   120 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))

   121   JRT_BLOCK;

   122   // Note: no handle for klass needed since they are not used

   123   //       anymore after new_objArray() and no GC can happen before.

   124   //       (This may have to change if this code changes!)

   125   assert(array_klass->is_klass(), "not a class");

   126   oop obj;

   127   if (array_klass->oop_is_typeArray()) {

   128     BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();

   129     obj = oopFactory::new_typeArray(elt_type, length, CHECK);

   130   } else {

   131     Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();

   132     obj = oopFactory::new_objArray(elem_klass, length, CHECK);

   133   }

   134   thread->set_vm_result(obj);

   135   // This is pretty rare but this runtime patch is stressful to deoptimization

   136   // if we deoptimize here so force a deopt to stress the path.

   137   if (DeoptimizeALot) {

   138     static int deopts = 0;

   139     // Alternate between deoptimizing and raising an error (which will also cause a deopt)

   140     if (deopts++ % 2 == 0) {

   141       ResourceMark rm(THREAD);

   142       THROW(vmSymbols::java_lang_OutOfMemoryError());

   143     } else {

   144       deopt_caller();

   145     }

   146   }

   147   JRT_BLOCK_END;

   148 

   149   if (ReduceInitialCardMarks) {

   150     new_store_pre_barrier(thread);

   151   }

   152 JRT_END

   153 

   154 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {

   155   // After any safepoint, just before going back to compiled code,

   156   // we inform the GC that we will be doing initializing writes to

   157   // this object in the future without emitting card-marks, so

   158   // GC may take any compensating steps.

   159   // NOTE: Keep this code consistent with GraphKit::store_barrier.

   160 

   161   oop new_obj = thread->vm_result();

   162   if (new_obj == NULL)  return;

   163 

   164   assert(Universe::heap()->can_elide_tlab_store_barriers(),

   165          "compiler must check this first");

   166   // GC may decide to give back a safer copy of new_obj.

   167   new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);

   168   thread->set_vm_result(new_obj);

   169 }

   170 

   171 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))

   172   assert(klass->is_klass(), "not a class");

   173   assert(rank >= 1, "rank must be nonzero");

   174   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);

   175   thread->set_vm_result(obj);

   176 JRT_END

   177 

   178 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))

   179   oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);

   180   thread->set_vm_result(obj);

   181 JRT_END

   182 

   183 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))

   184   instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));

   185 

   186   if (klass == NULL) {

   187     ResourceMark rm(THREAD);

   188     THROW(vmSymbols::java_lang_InstantiationException());

   189   }

   190 

   191   // Create new instance (the receiver)

   192   klass->check_valid_for_instantiation(false, CHECK);

   193 

   194   // Make sure klass gets initialized

   195   klass->initialize(CHECK);

   196 

   197   oop obj = klass->allocate_instance(CHECK);

   198   thread->set_vm_result(obj);

   199 JRT_END

   200 

   201 extern void vm_exit(int code);

   202 

   203 // Enter this method from compiled code handler below. This is where we transition

   204 // to VM mode. This is done as a helper routine so that the method called directly

   205 // from compiled code does not have to transition to VM. This allows the entry

   206 // method to see if the nmethod that we have just looked up a handler for has

   207 // been deoptimized while we were in the vm. This simplifies the assembly code

   208 // cpu directories.

   209 //

   210 // We are entering here from exception stub (via the entry method below)

   211 // If there is a compiled exception handler in this method, we will continue there;

   212 // otherwise we will unwind the stack and continue at the caller of top frame method

   213 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to

   214 // control the area where we can allow a safepoint. After we exit the safepoint area we can

   215 // check to see if the handler we are going to return is now in a nmethod that has

   216 // been deoptimized. If that is the case we return the deopt blob

   217 // unpack_with_exception entry instead. This makes life for the exception blob easier

   218 // because making that same check and diverting is painful from assembly language.

   219 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))

   220   // Reset method handle flag.

   221   thread->set_is_method_handle_return(false);

   222 

   223   Handle exception(thread, ex);

   224   nm = CodeCache::find_nmethod(pc);

   225   assert(nm != NULL, "this is not a compiled method");

   226   // Adjust the pc as needed/

   227   if (nm->is_deopt_pc(pc)) {

   228     RegisterMap map(thread, false);

   229     frame exception_frame = thread->last_frame().sender(&map);

   230     // if the frame isn't deopted then pc must not correspond to the caller of last_frame

   231     assert(exception_frame.is_deoptimized_frame(), "must be deopted");

   232     pc = exception_frame.pc();

   233   }

   234 #ifdef ASSERT

   235   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");

   236   assert(exception->is_oop(), "just checking");

   237   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError

   238   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {

   239     if (ExitVMOnVerifyError) vm_exit(-1);

   240     ShouldNotReachHere();

   241   }

   242 #endif

   243 

   244   // Check the stack guard pages and reenable them if necessary and there is

   245   // enough space on the stack to do so.  Use fast exceptions only if the guard

   246   // pages are enabled.

   247   bool guard_pages_enabled = thread->stack_yellow_zone_enabled();

   248   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();

   249 

   250   if (JvmtiExport::can_post_on_exceptions()) {

   251     // To ensure correct notification of exception catches and throws

   252     // we have to deoptimize here.  If we attempted to notify the

   253     // catches and throws during this exception lookup it's possible

   254     // we could deoptimize on the way out of the VM and end back in

   255     // the interpreter at the throw site.  This would result in double

   256     // notifications since the interpreter would also notify about

   257     // these same catches and throws as it unwound the frame.

   258 

   259     RegisterMap reg_map(thread);

   260     frame stub_frame = thread->last_frame();

   261     frame caller_frame = stub_frame.sender(&reg_map);

   262 

   263     // We don't really want to deoptimize the nmethod itself since we

   264     // can actually continue in the exception handler ourselves but I

   265     // don't see an easy way to have the desired effect.

   266     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);

   267     assert(caller_is_deopted(), "Must be deoptimized");

   268 

   269     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();

   270   }

   271 

   272   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions

   273   if (guard_pages_enabled) {

   274     address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);

   275     if (fast_continuation != NULL) {

   276       // Set flag if return address is a method handle call site.

   277       thread->set_is_method_handle_return(nm->is_method_handle_return(pc));

   278       return fast_continuation;

   279     }

   280   }

   281 

   282   // If the stack guard pages are enabled, check whether there is a handler in

   283   // the current method.  Otherwise (guard pages disabled), force an unwind and

   284   // skip the exception cache update (i.e., just leave continuation==NULL).

   285   address continuation = NULL;

   286   if (guard_pages_enabled) {

   287 

   288     // New exception handling mechanism can support inlined methods

   289     // with exception handlers since the mappings are from PC to PC

   290 

   291     // debugging support

   292     // tracing

   293     if (TraceExceptions) {

   294       ttyLocker ttyl;

   295       ResourceMark rm;

   296       tty->print_cr("Exception <%s> (" INTPTR_FORMAT ") thrown in compiled method <%s> at PC " INTPTR_FORMAT " for thread " INTPTR_FORMAT "",

   297                     exception->print_value_string(), p2i((address)exception()), nm->method()->print_value_string(), p2i(pc), p2i(thread));

   298     }

   299     // for AbortVMOnException flag

   300     NOT_PRODUCT(Exceptions::debug_check_abort(exception));

   301 

   302     // Clear out the exception oop and pc since looking up an

   303     // exception handler can cause class loading, which might throw an

   304     // exception and those fields are expected to be clear during

   305     // normal bytecode execution.

   306     thread->clear_exception_oop_and_pc();

   307 

   308     continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);

   309     // If an exception was thrown during exception dispatch, the exception oop may have changed

   310     thread->set_exception_oop(exception());

   311     thread->set_exception_pc(pc);

   312 

   313     // the exception cache is used only by non-implicit exceptions

   314     if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) {

   315       nm->add_handler_for_exception_and_pc(exception, pc, continuation);

   316     }

   317   }

   318 

   319   // Set flag if return address is a method handle call site.

   320   thread->set_is_method_handle_return(nm->is_method_handle_return(pc));

   321 

   322   if (TraceExceptions) {

   323     ttyLocker ttyl;

   324     ResourceMark rm;

   325     tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,

   326                   p2i(thread), p2i(continuation), p2i(pc));

   327   }

   328 

   329   return continuation;

   330 JRT_END

   331 

   332 // Enter this method from compiled code only if there is a Java exception handler

   333 // in the method handling the exception.

   334 // We are entering here from exception stub. We don't do a normal VM transition here.

   335 // We do it in a helper. This is so we can check to see if the nmethod we have just

   336 // searched for an exception handler has been deoptimized in the meantime.

   337 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {

   338   oop exception = thread->exception_oop();

   339   address pc = thread->exception_pc();

   340   // Still in Java mode

   341   DEBUG_ONLY(ResetNoHandleMark rnhm);

   342   nmethod* nm = NULL;

   343   address continuation = NULL;

   344   {

   345     // Enter VM mode by calling the helper

   346     ResetNoHandleMark rnhm;

   347     continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);

   348   }

   349   // Back in JAVA, use no oops DON'T safepoint

   350 

   351   // Now check to see if the compiled method we were called from is now deoptimized.

   352   // If so we must return to the deopt blob and deoptimize the nmethod

   353   if (nm != NULL && caller_is_deopted()) {

   354     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();

   355   }

   356 

   357   assert(continuation != NULL, "no handler found");

   358   return continuation;

   359 }

   360 

   361 JRT_ENTRY(void, JVMCIRuntime::create_null_exception(JavaThread* thread))

   362   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());

   363   thread->set_vm_result(PENDING_EXCEPTION);

   364   CLEAR_PENDING_EXCEPTION;

   365 JRT_END

   366 

   367 JRT_ENTRY(void, JVMCIRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index))

   368   char message[jintAsStringSize];

   369   sprintf(message, "%d", index);

   370   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);

   371   thread->set_vm_result(PENDING_EXCEPTION);

   372   CLEAR_PENDING_EXCEPTION;

   373 JRT_END

   374 

   375 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))

   376   IF_TRACE_jvmci_3 {

   377     char type[O_BUFLEN];

   378     obj->klass()->name()->as_C_string(type, O_BUFLEN);

   379     markOop mark = obj->mark();

   380     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));

   381     tty->flush();

   382   }

   383 #ifdef ASSERT

   384   if (PrintBiasedLockingStatistics) {

   385     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());

   386   }

   387 #endif

   388   Handle h_obj(thread, obj);

   389   assert(h_obj()->is_oop(), "must be NULL or an object");

   390   if (UseBiasedLocking) {

   391     // Retry fast entry if bias is revoked to avoid unnecessary inflation

   392     ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);

   393   } else {

   394     if (JVMCIUseFastLocking) {

   395       // When using fast locking, the compiled code has already tried the fast case

   396       ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);

   397     } else {

   398       ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);

   399     }

   400   }

   401   TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));

   402 JRT_END

   403 

   404 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))

   405   assert(thread == JavaThread::current(), "threads must correspond");

   406   assert(thread->last_Java_sp(), "last_Java_sp must be set");

   407   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown

   408   EXCEPTION_MARK;

   409 

   410 #ifdef DEBUG

   411   if (!obj->is_oop()) {

   412     ResetNoHandleMark rhm;

   413     nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();

   414     if (method != NULL) {

   415       tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));

   416     }

   417     thread->print_stack_on(tty);

   418     assert(false, "invalid lock object pointer dected");

   419   }

   420 #endif

   421 

   422   if (JVMCIUseFastLocking) {

   423     // When using fast locking, the compiled code has already tried the fast case

   424     ObjectSynchronizer::slow_exit(obj, lock, THREAD);

   425   } else {

   426     ObjectSynchronizer::fast_exit(obj, lock, THREAD);

   427   }

   428   IF_TRACE_jvmci_3 {

   429     char type[O_BUFLEN];

   430     obj->klass()->name()->as_C_string(type, O_BUFLEN);

   431     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));

   432     tty->flush();

   433   }

   434 JRT_END

   435 

   436 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, jint flags))

   437   bool string =  mask_bits_are_true(flags, LOG_OBJECT_STRING);

   438   bool addr = mask_bits_are_true(flags, LOG_OBJECT_ADDRESS);

   439   bool newline = mask_bits_are_true(flags, LOG_OBJECT_NEWLINE);

   440   if (!string) {

   441     if (!addr && obj->is_oop_or_null(true)) {

   442       char buf[O_BUFLEN];

   443       tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));

   444     } else {

   445       tty->print(INTPTR_FORMAT, p2i(obj));

   446     }

   447   } else {

   448     ResourceMark rm;

   449     assert(obj != NULL && java_lang_String::is_instance(obj), "must be");

   450     char *buf = java_lang_String::as_utf8_string(obj);

   451     tty->print_raw(buf);

   452   }

   453   if (newline) {

   454     tty->cr();

   455   }

   456 JRT_END

   457 

   458 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))

   459   thread->satb_mark_queue().enqueue(obj);

   460 JRT_END

   461 

   462 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))

   463   thread->dirty_card_queue().enqueue(card_addr);

   464 JRT_END

   465 

   466 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))

   467   bool ret = true;

   468   if(!Universe::heap()->is_in_closed_subset(parent)) {

   469     tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));

   470     parent->print();

   471     ret=false;

   472   }

   473   if(!Universe::heap()->is_in_closed_subset(child)) {

   474     tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));

   475     child->print();

   476     ret=false;

   477   }

   478   return (jint)ret;

   479 JRT_END

   480 

   481 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))

   482   ResourceMark rm;

   483   const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;

   484   char *detail_msg = NULL;

   485   if (format != 0L) {

   486     const char* buf = (char*) (address) format;

   487     size_t detail_msg_length = strlen(buf) * 2;

   488     detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);

   489     jio_snprintf(detail_msg, detail_msg_length, buf, value);

   490   }

   491   report_vm_error(__FILE__, __LINE__, error_msg, detail_msg);

   492 JRT_END

   493 

   494 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))

   495   oop exception = thread->exception_oop();

   496   assert(exception != NULL, "npe");

   497   thread->set_exception_oop(NULL);

   498   thread->set_exception_pc(0);

   499   return exception;

   500 JRT_END

   501 

   502 PRAGMA_DIAG_PUSH

   503 PRAGMA_FORMAT_NONLITERAL_IGNORED

   504 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))

   505   ResourceMark rm;

   506   assert(format != NULL && java_lang_String::is_instance(format), "must be");

   507   char *buf = java_lang_String::as_utf8_string(format);

   508   tty->print((const char*)buf, v1, v2, v3);

   509 JRT_END

   510 PRAGMA_DIAG_POP

   511 

   512 static void decipher(jlong v, bool ignoreZero) {

   513   if (v != 0 || !ignoreZero) {

   514     void* p = (void *)(address) v;

   515     CodeBlob* cb = CodeCache::find_blob(p);

   516     if (cb) {

   517       if (cb->is_nmethod()) {

   518         char buf[O_BUFLEN];

   519         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()));

   520         return;

   521       }

   522       cb->print_value_on(tty);

   523       return;

   524     }

   525     if (Universe::heap()->is_in(p)) {

   526       oop obj = oop(p);

   527       obj->print_value_on(tty);

   528       return;

   529     }

   530     tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);

   531   }

   532 }

   533 

   534 PRAGMA_DIAG_PUSH

   535 PRAGMA_FORMAT_NONLITERAL_IGNORED

   536 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))

   537   ResourceMark rm;

   538   const char *buf = (const char*) (address) format;

   539   if (vmError) {

   540     if (buf != NULL) {

   541       fatal(err_msg(buf, v1, v2, v3));

   542     } else {

   543       fatal("<anonymous error>");

   544     }

   545   } else if (buf != NULL) {

   546     tty->print(buf, v1, v2, v3);

   547   } else {

   548     assert(v2 == 0, "v2 != 0");

   549     assert(v3 == 0, "v3 != 0");

   550     decipher(v1, false);

   551   }

   552 JRT_END

   553 PRAGMA_DIAG_POP

   554 

   555 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))

   556   union {

   557       jlong l;

   558       jdouble d;

   559       jfloat f;

   560   } uu;

   561   uu.l = value;

   562   switch (typeChar) {

   563     case 'z': tty->print(value == 0 ? "false" : "true"); break;

   564     case 'b': tty->print("%d", (jbyte) value); break;

   565     case 'c': tty->print("%c", (jchar) value); break;

   566     case 's': tty->print("%d", (jshort) value); break;

   567     case 'i': tty->print("%d", (jint) value); break;

   568     case 'f': tty->print("%f", uu.f); break;

   569     case 'j': tty->print(JLONG_FORMAT, value); break;

   570     case 'd': tty->print("%lf", uu.d); break;

   571     default: assert(false, "unknown typeChar"); break;

   572   }

   573   if (newline) {

   574     tty->cr();

   575   }

   576 JRT_END

   577 

   578 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))

   579   return (jint) obj->identity_hash();

   580 JRT_END

   581 

   582 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))

   583   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.

   584   // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.

   585   Handle receiverHandle(thread, receiver);

   586   MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);

   587   JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());

   588   if (receiverThread == NULL) {

   589     // The other thread may exit during this process, which is ok so return false.

   590     return JNI_FALSE;

   591   } else {

   592     return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);

   593   }

   594 JRT_END

   595 

   596 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))

   597   deopt_caller();

   598   return value;

   599 JRT_END

   600 

   601 // private static JVMCIRuntime JVMCI.initializeRuntime()

   602 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))

   603   if (!EnableJVMCI) {

   604     THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")

   605   }

   606   JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);

   607   jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);

   608   return ret;

   609 JVM_END

   610 

   611 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {

   612   guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");

   613 

   614   TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));

   615   KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));

   616   TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));

   617   TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));

   618   JavaValue result(T_OBJECT);

   619   if (args == NULL) {

   620     JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));

   621   } else {

   622     JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));

   623   }

   624   return Handle((oop)result.get_jobject());

   625 }

   626 

   627 static bool jvmci_options_file_exists() {

   628   const char* home = Arguments::get_java_home();

   629   size_t path_len = strlen(home) + strlen("/lib/jvmci/options") + 1;

   630   char path[JVM_MAXPATHLEN];

   631   char sep = os::file_separator()[0];

   632   jio_snprintf(path, JVM_MAXPATHLEN, "%s%clib%cjvmci%coptions", home, sep, sep, sep);

   633   struct stat st;

   634   return os::stat(path, &st) == 0;

   635 }

   636 

   637 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {

   638   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {

   639 #ifdef ASSERT

   640     // This should only be called in the context of the JVMCI class being initialized

   641     TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);

   642     Klass* k = SystemDictionary::resolve_or_null(name, CHECK);

   643     instanceKlassHandle klass = InstanceKlass::cast(k);

   644     assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),

   645            "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");

   646 #endif

   647 

   648     bool parseOptionsFile = jvmci_options_file_exists();

   649     if (_options != NULL || parseOptionsFile) {

   650       JavaCallArguments args;

   651       objArrayOop options;

   652       if (_options != NULL) {

   653         options = oopFactory::new_objArray(SystemDictionary::String_klass(), _options_count * 2, CHECK);

   654         for (int i = 0; i < _options_count; i++) {

   655           SystemProperty* prop = _options[i];

   656           oop name = java_lang_String::create_oop_from_str(prop->key() + OPTION_PREFIX_LEN, CHECK);

   657           oop value = java_lang_String::create_oop_from_str(prop->value(), CHECK);

   658           options->obj_at_put(i * 2, name);

   659           options->obj_at_put((i * 2) + 1, value);

   660         }

   661       } else {

   662         options = NULL;

   663       }

   664       args.push_oop(options);

   665       args.push_int(parseOptionsFile);

   666       callStatic("jdk/vm/ci/options/OptionsParser",

   667                  "parseOptionsFromVM",

   668                  "([Ljava/lang/String;Z)Ljava/lang/Boolean;", &args, CHECK);

   669     }

   670 

   671     if (_compiler != NULL) {

   672       JavaCallArguments args;

   673       oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);

   674       args.push_oop(compiler);

   675       callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",

   676                  "selectCompiler",

   677                  "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);

   678     }

   679 

   680     Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",

   681                                "runtime",

   682                                "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);

   683     _HotSpotJVMCIRuntime_initialized = true;

   684     _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());

   685   }

   686 }

   687 

   688 void JVMCIRuntime::initialize_JVMCI(TRAPS) {

   689   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {

   690     callStatic("jdk/vm/ci/runtime/JVMCI",

   691                "getRuntime",

   692                "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);

   693   }

   694   assert(_HotSpotJVMCIRuntime_initialized == true, "what?");

   695 }

   696 

   697 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {

   698   if (JVMCIRuntime::_well_known_classes_initialized == false) {

   699     SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;

   700     SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);

   701     JVMCIJavaClasses::compute_offsets();

   702     JVMCIRuntime::_well_known_classes_initialized = true;

   703   }

   704 }

   705 

   706 void JVMCIRuntime::metadata_do(void f(Metadata*)) {

   707   // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in

   708   // the SystemDictionary well known classes should ensure the other

   709   // classes have already been loaded, so make sure their order in the

   710   // table enforces that.

   711   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <

   712          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");

   713   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <

   714          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");

   715   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <

   716          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");

   717 

   718   if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||

   719       !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {

   720     // Nothing could be registered yet

   721     return;

   722   }

   723 

   724   // WeakReference<HotSpotJVMCIMetaAccessContext>[]

   725   objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();

   726   if (allContexts == NULL) {

   727     return;

   728   }

   729 

   730   // These must be loaded at this point but the linking state doesn't matter.

   731   assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");

   732   assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");

   733   assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");

   734 

   735   for (int i = 0; i < allContexts->length(); i++) {

   736     oop ref = allContexts->obj_at(i);

   737     if (ref != NULL) {

   738       oop referent = java_lang_ref_Reference::referent(ref);

   739       if (referent != NULL) {

   740         // Chunked Object[] with last element pointing to next chunk

   741         objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);

   742         while (metadataRoots != NULL) {

   743           for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {

   744             oop reference = metadataRoots->obj_at(typeIndex);

   745             if (reference == NULL) {

   746               continue;

   747             }

   748             oop metadataRoot = java_lang_ref_Reference::referent(reference);

   749             if (metadataRoot == NULL) {

   750               continue;

   751             }

   752             if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {

   753               Method* method = CompilerToVM::asMethod(metadataRoot);

   754               f(method);

   755             } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {

   756               ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);

   757               f(constantPool);

   758             } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {

   759               Klass* klass = CompilerToVM::asKlass(metadataRoot);

   760               f(klass);

   761             } else {

   762               metadataRoot->print();

   763               ShouldNotReachHere();

   764             }

   765           }

   766           metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);

   767           assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");

   768         }

   769       }

   770     }

   771   }

   772 }

   773 

   774 // private static void CompilerToVM.registerNatives()

   775 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))

   776   if (!EnableJVMCI) {

   777     THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");

   778   }

   779 

   780 #ifdef _LP64

   781   uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();

   782   uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;

   783   guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");

   784 #else

   785   fatal("check TLAB allocation code for address space conflicts");

   786 #endif

   787 

   788   JVMCIRuntime::initialize_well_known_classes(CHECK);

   789 

   790   {

   791     ThreadToNativeFromVM trans(thread);

   792 

   793     // Ensure _non_oop_bits is initialized

   794     Universe::non_oop_word();

   795 

   796     env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());

   797   }

   798 JVM_END

   799 

   800 /**

   801  * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.

   802  * The line must match the regular expression "[^=]+=.*". That is one or more

   803  * characters other than '=' followed by '=' followed by zero or more characters.

   804  * Everything before the '=' is the property name and everything after '=' is the value.

   805  * Lines that start with '#' are treated as comments and ignored.

   806  * No special processing of whitespace or any escape characters is performed.

   807  * The last definition of a property "wins" (i.e., it overrides all earlier

   808  * definitions of the property).

   809  */

   810 class JVMCIPropertiesFileClosure : public ParseClosure {

   811   SystemProperty** _plist;

   812 public:

   813   JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}

   814   void do_line(char* line) {

   815     if (line[0] == '#') {

   816       // skip comment

   817       return;

   818     }

   819     size_t len = strlen(line);

   820     char* sep = strchr(line, '=');

   821     if (sep == NULL) {

   822       warn_and_abort("invalid format: could not find '=' character");

   823       return;

   824     }

   825     if (sep == line) {

   826       warn_and_abort("invalid format: name cannot be empty");

   827       return;

   828     }

   829     *sep = '\0';

   830     const char* name = line;

   831     char* value = sep + 1;

   832     Arguments::PropertyList_unique_add(_plist, name, value);

   833   }

   834 };

   835 

   836 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {

   837   char jvmciDir[JVM_MAXPATHLEN];

   838   const char* fileSep = os::file_separator();

   839   jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",

   840                Arguments::get_java_home(), fileSep, fileSep, fileSep);

   841   DIR* dir = os::opendir(jvmciDir);

   842   if (dir != NULL) {

   843     struct dirent *entry;

   844     char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);

   845     JVMCIPropertiesFileClosure closure(plist);

   846     const unsigned suffix_len = (unsigned)strlen(".properties");

   847     while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {

   848       const char* name = entry->d_name;

   849       if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {

   850         char propertiesFilePath[JVM_MAXPATHLEN];

   851         jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);

   852         JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);

   853       }

   854     }

   855     FREE_C_HEAP_ARRAY(char, dbuf);

   856     os::closedir(dir);

   857   }

   858 }

   859 

   860 #define CHECK_WARN_ABORT_(message) THREAD); \

   861   if (HAS_PENDING_EXCEPTION) { \

   862     warning(message); \

   863     char buf[512]; \

   864     jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \

   865     JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \

   866     return; \

   867   } \

   868   (void)(0

   869 

   870 void JVMCIRuntime::save_compiler(const char* compiler) {

   871   assert(compiler != NULL, "npe");

   872   assert(_compiler == NULL, "cannot reassign JVMCI compiler");

   873   _compiler = compiler;

   874 }

   875 

   876 jint JVMCIRuntime::save_options(SystemProperty* props) {

   877   int count = 0;

   878   SystemProperty* first = NULL;

   879   for (SystemProperty* p = props; p != NULL; p = p->next()) {

   880     if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {

   881       if (p->value() == NULL || strlen(p->value()) == 0) {

   882         jio_fprintf(defaultStream::output_stream(), "JVMCI option %s must have non-zero length value\n", p->key());

   883         return JNI_ERR;

   884       }

   885       if (first == NULL) {

   886         first = p;

   887       }

   888       count++;

   889     }

   890   }

   891   if (count != 0) {

   892     _options_count = count;

   893     _options = NEW_C_HEAP_ARRAY(SystemProperty*, count, mtCompiler);

   894     _options[0] = first;

   895     SystemProperty** insert_pos = _options + 1;

   896     for (SystemProperty* p = first->next(); p != NULL; p = p->next()) {

   897       if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {

   898         *insert_pos = p;

   899         insert_pos++;

   900       }

   901     }

   902     assert (insert_pos - _options == count, "must be");

   903   }

   904   return JNI_OK;

   905 }

   906 

   907 void JVMCIRuntime::shutdown() {

   908   if (_HotSpotJVMCIRuntime_instance != NULL) {

   909     _shutdown_called = true;

   910     JavaThread* THREAD = JavaThread::current();

   911     HandleMark hm(THREAD);

   912     Handle receiver = get_HotSpotJVMCIRuntime(CHECK_ABORT);

   913     JavaValue result(T_VOID);

   914     JavaCallArguments args;

   915     args.push_oop(receiver);

   916     JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK_ABORT);

   917   }

   918 }

   919 

   920 void JVMCIRuntime::call_printStackTrace(Handle exception, Thread* thread) {

   921   assert(exception->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");

   922   JavaValue result(T_VOID);

   923   JavaCalls::call_virtual(&result,

   924                           exception,

   925                           KlassHandle(thread,

   926                           SystemDictionary::Throwable_klass()),

   927                           vmSymbols::printStackTrace_name(),

   928                           vmSymbols::void_method_signature(),

   929                           thread);

   930 }

   931 

   932 void JVMCIRuntime::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {

   933   Thread* THREAD = Thread::current();

   934   CLEAR_PENDING_EXCEPTION;

   935   tty->print_raw_cr(message);

   936   call_printStackTrace(exception, THREAD);

   937 

   938   // Give other aborting threads to also print their stack traces.

   939   // This can be very useful when debugging class initialization

   940   // failures.

   941   os::sleep(THREAD, 200, false);

   942 

   943   vm_abort(dump_core);

   944 }

   945 

   946 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {

   947   struct stat st;

   948   if (os::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file

   949     int file_handle = os::open(path, 0, 0);

   950     if (file_handle != -1) {

   951       char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);

   952       int num_read;

   953       num_read = (int) os::read(file_handle, (char*) buffer, st.st_size);

   954       if (num_read == -1) {

   955         warning("Error reading file %s due to %s", path, strerror(errno));

   956       } else if (num_read != st.st_size) {

   957         warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);

   958       }

   959       os::close(file_handle);

   960       closure->set_filename(path);

   961       if (num_read == st.st_size) {

   962         buffer[num_read] = '\0';

   963 

   964         char* line = buffer;

   965         while (line - buffer < num_read && !closure->is_aborted()) {

   966           // find line end (\r, \n or \r\n)

   967           char* nextline = NULL;

   968           char* cr = strchr(line, '\r');

   969           char* lf = strchr(line, '\n');

   970           if (cr != NULL && lf != NULL) {

   971             char* min = MIN2(cr, lf);

   972             *min = '\0';

   973             if (lf == cr + 1) {

   974               nextline = lf + 1;

   975             } else {

   976               nextline = min + 1;

   977             }

   978           } else if (cr != NULL) {

   979             *cr = '\0';

   980             nextline = cr + 1;

   981           } else if (lf != NULL) {

   982             *lf = '\0';

   983             nextline = lf + 1;

   984           }

   985           // trim left

   986           while (*line == ' ' || *line == '\t') line++;

   987           char* end = line + strlen(line);

   988           // trim right

   989           while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;

   990           *end = '\0';

   991           // skip comments and empty lines

   992           if (*line != '#' && strlen(line) > 0) {

   993             closure->parse_line(line);

   994           }

   995           if (nextline != NULL) {

   996             line = nextline;

   997           } else {

   998             // File without newline at the end

   999             break;

  1000           }

  1001         }

  1002       }

  1003       FREE_C_HEAP_ARRAY(char, buffer);

  1004     } else {

  1005       warning("Error opening file %s due to %s", path, strerror(errno));

  1006     }

  1007   } else if (warnStatFailure) {

  1008     warning("Could not stat file %s due to %s", path, strerror(errno));

  1009   }

  1010 }