void Parse::emit_guard_for_new(ciInstanceKlass* klass) {
// Emit guarded new
// if (klass->_init_thread != current_thread ||
// klass->_init_state != being_initialized)
// uncommon_trap
Node* cur_thread = _gvn.transform( new (C, 1) ThreadLocalNode() );
Node* merge = new (C, 3) RegionNode(3);
_gvn.set_type(merge, Type::CONTROL);
Node* kls = makecon(TypeKlassPtr::make(klass));
Node* init_thread_offset = _gvn.MakeConX(instanceKlass::init_thread_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes());
Node* adr_node = basic_plus_adr(kls, kls, init_thread_offset);
Node* init_thread = make_load(NULL, adr_node, TypeRawPtr::BOTTOM, T_ADDRESS);
Node *tst = Bool( CmpP( init_thread, cur_thread), BoolTest::eq);
IfNode* iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
set_control(IfTrue(iff));
merge->set_req(1, IfFalse(iff));
Node* init_state_offset = _gvn.MakeConX(instanceKlass::init_state_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes());
adr_node = basic_plus_adr(kls, kls, init_state_offset);
Node* init_state = make_load(NULL, adr_node, TypeInt::INT, T_INT);
Node* being_init = _gvn.intcon(instanceKlass::being_initialized);
tst = Bool( CmpI( init_state, being_init), BoolTest::eq);
iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
set_control(IfTrue(iff));
merge->set_req(2, IfFalse(iff));
PreserveJVMState pjvms(this);
record_for_igvn(merge);
set_control(merge);
uncommon_trap(Deoptimization::Reason_uninitialized,
Deoptimization::Action_reinterpret,
klass);
}
//-------------------------------set_md_flag_at--------------------------------
void Parse::set_md_flag_at(ciMethodData* md, ciProfileData* data, int flag_constant) {
Node* adr_node = method_data_addressing(md, data, DataLayout::flags_offset());
const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
Node* flags = make_load(NULL, adr_node, TypeInt::BYTE, T_BYTE, adr_type);
Node* incr = _gvn.transform(new (C) OrINode(flags, _gvn.intcon(flag_constant)));
store_to_memory(NULL, adr_node, incr, T_BYTE, adr_type);
}
//--------------------------test_for_osr_md_counter_at-------------------------
void Parse::test_for_osr_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, int limit) {
Node* adr_node = method_data_addressing(md, data, counter_offset);
const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type);
test_counter_against_threshold(cnt, limit);
}
//--------------------------increment_md_counter_at----------------------------
void Parse::increment_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, Node* idx, uint stride) {
Node* adr_node = method_data_addressing(md, data, counter_offset, idx, stride);
const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type);
Node* incr = _gvn.transform(new (C) AddINode(cnt, _gvn.intcon(DataLayout::counter_increment)));
store_to_memory(NULL, adr_node, incr, T_INT, adr_type );
}
// Create a LoadNode, reading from the parser's memory state.
// (Note: require_atomic_access is useful only with T_LONG.)
//
// We choose the unordered semantics by default because we have
// adapted the `do_put_xxx' and `do_get_xxx' procedures for the case
// of volatile fields.
Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
MemNode::MemOrd mo, LoadNode::ControlDependency control_dependency = LoadNode::DependsOnlyOnTest,
bool require_atomic_access = false, bool unaligned = false,
bool mismatched = false) {
// This version computes alias_index from bottom_type
return make_load(ctl, adr, t, bt, adr->bottom_type()->is_ptr(),
mo, control_dependency, require_atomic_access,
unaligned, mismatched);
}
Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, const TypePtr* adr_type,
MemNode::MemOrd mo, LoadNode::ControlDependency control_dependency = LoadNode::DependsOnlyOnTest,
bool require_atomic_access = false, bool unaligned = false,
bool mismatched = false) {
// This version computes alias_index from an address type
assert(adr_type != NULL, "use other make_load factory");
return make_load(ctl, adr, t, bt, C->get_alias_index(adr_type),
mo, control_dependency, require_atomic_access,
unaligned, mismatched);
}
//----------------------increment_and_test_invocation_counter-------------------
void Parse::increment_and_test_invocation_counter(int limit) {
if (!count_invocations()) return;
// Get the Method* node.
const TypePtr* adr_type = TypeMetadataPtr::make(method());
Node *method_node = makecon(adr_type);
// Load the interpreter_invocation_counter from the Method*.
int offset = Method::interpreter_invocation_counter_offset_in_bytes();
Node* adr_node = basic_plus_adr(method_node, method_node, offset);
Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type);
test_counter_against_threshold(cnt, limit);
// Add one to the counter and store
Node* incr = _gvn.transform(new (C) AddINode(cnt, _gvn.intcon(1)));
store_to_memory( NULL, adr_node, incr, T_INT, adr_type );
}
//----------------------increment_and_test_invocation_counter-------------------
void Parse::increment_and_test_invocation_counter(int limit) {
if (!count_invocations()) return;
// Get the Method* node.
ciMethod* m = method();
MethodCounters* counters_adr = m->ensure_method_counters();
if (counters_adr == NULL) {
C->record_failure("method counters allocation failed");
return;
}
Node* ctrl = control();
const TypePtr* adr_type = TypeRawPtr::make((address) counters_adr);
Node *counters_node = makecon(adr_type);
Node* adr_iic_node = basic_plus_adr(counters_node, counters_node,
MethodCounters::interpreter_invocation_counter_offset_in_bytes());
Node* cnt = make_load(ctrl, adr_iic_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
test_counter_against_threshold(cnt, limit);
// Add one to the counter and store
Node* incr = _gvn.transform(new AddINode(cnt, _gvn.intcon(1)));
store_to_memory(ctrl, adr_iic_node, incr, T_INT, adr_type, MemNode::unordered);
}
void Parse::do_get_xxx(Node* obj, ciField* field, bool is_field) {
// Does this field have a constant value? If so, just push the value.
if (field->is_constant()) {
if (field->is_static()) {
// final static field
if (push_constant(field->constant_value()))
return;
}
else {
// final non-static field of a trusted class (classes in
// java.lang.invoke and sun.invoke packages and subpackages).
if (obj->is_Con()) {
const TypeOopPtr* oop_ptr = obj->bottom_type()->isa_oopptr();
ciObject* constant_oop = oop_ptr->const_oop();
ciConstant constant = field->constant_value_of(constant_oop);
if (push_constant(constant, true))
return;
}
}
}
ciType* field_klass = field->type();
bool is_vol = field->is_volatile();
// Compute address and memory type.
int offset = field->offset_in_bytes();
const TypePtr* adr_type = C->alias_type(field)->adr_type();
Node *adr = basic_plus_adr(obj, obj, offset);
BasicType bt = field->layout_type();
// Build the resultant type of the load
const Type *type;
bool must_assert_null = false;
if( bt == T_OBJECT ) {
if (!field->type()->is_loaded()) {
type = TypeInstPtr::BOTTOM;
must_assert_null = true;
} else if (field->is_constant() && field->is_static()) {
// This can happen if the constant oop is non-perm.
ciObject* con = field->constant_value().as_object();
// Do not "join" in the previous type; it doesn't add value,
// and may yield a vacuous result if the field is of interface type.
type = TypeOopPtr::make_from_constant(con)->isa_oopptr();
assert(type != NULL, "field singleton type must be consistent");
} else {
type = TypeOopPtr::make_from_klass(field_klass->as_klass());
}
} else {
type = Type::get_const_basic_type(bt);
}
// Build the load.
Node* ld = make_load(NULL, adr, type, bt, adr_type, is_vol);
// Adjust Java stack
if (type2size[bt] == 1)
push(ld);
else
push_pair(ld);
if (must_assert_null) {
// Do not take a trap here. It's possible that the program
// will never load the field's class, and will happily see
// null values in this field forever. Don't stumble into a
// trap for such a program, or we might get a long series
// of useless recompilations. (Or, we might load a class
// which should not be loaded.) If we ever see a non-null
// value, we will then trap and recompile. (The trap will
// not need to mention the class index, since the class will
// already have been loaded if we ever see a non-null value.)
// uncommon_trap(iter().get_field_signature_index());
#ifndef PRODUCT
if (PrintOpto && (Verbose || WizardMode)) {
method()->print_name(); tty->print_cr(" asserting nullness of field at bci: %d", bci());
}
#endif
if (C->log() != NULL) {
C->log()->elem("assert_null reason='field' klass='%d'",
C->log()->identify(field->type()));
}
// If there is going to be a trap, put it at the next bytecode:
set_bci(iter().next_bci());
do_null_assert(peek(), T_OBJECT);
set_bci(iter().cur_bci()); // put it back
}
// If reference is volatile, prevent following memory ops from
// floating up past the volatile read. Also prevents commoning
// another volatile read.
if (field->is_volatile()) {
// Memory barrier includes bogus read of value to force load BEFORE membar
insert_mem_bar(Op_MemBarAcquire, ld);
}
}
//--------------------gen_stub-------------------------------
void GraphKit::gen_stub(address C_function,
const char *name,
int is_fancy_jump,
bool pass_tls,
bool return_pc) {
ResourceMark rm;
const TypeTuple *jdomain = C->tf()->domain();
const TypeTuple *jrange = C->tf()->range();
// The procedure start
StartNode* start = new (C) StartNode(root(), jdomain);
_gvn.set_type_bottom(start);
// Make a map, with JVM state
uint parm_cnt = jdomain->cnt();
uint max_map = MAX2(2*parm_cnt+1, jrange->cnt());
// %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces
assert(SynchronizationEntryBCI == InvocationEntryBci, "");
JVMState* jvms = new (C) JVMState(0);
jvms->set_bci(InvocationEntryBci);
jvms->set_monoff(max_map);
jvms->set_scloff(max_map);
jvms->set_endoff(max_map);
{
SafePointNode *map = new (C) SafePointNode( max_map, jvms );
jvms->set_map(map);
set_jvms(jvms);
assert(map == this->map(), "kit.map is set");
}
// Make up the parameters
uint i;
for( i = 0; i < parm_cnt; i++ )
map()->init_req(i, _gvn.transform(new (C) ParmNode(start, i)));
for( ; i<map()->req(); i++ )
map()->init_req(i, top()); // For nicer debugging
// GraphKit requires memory to be a MergeMemNode:
set_all_memory(map()->memory());
// Get base of thread-local storage area
Node* thread = _gvn.transform( new (C) ThreadLocalNode() );
const int NoAlias = Compile::AliasIdxBot;
Node* adr_last_Java_pc = basic_plus_adr(top(),
thread,
in_bytes(JavaThread::frame_anchor_offset()) +
in_bytes(JavaFrameAnchor::last_Java_pc_offset()));
#if defined(SPARC)
Node* adr_flags = basic_plus_adr(top(),
thread,
in_bytes(JavaThread::frame_anchor_offset()) +
in_bytes(JavaFrameAnchor::flags_offset()));
#endif /* defined(SPARC) */
// Drop in the last_Java_sp. last_Java_fp is not touched.
// Always do this after the other "last_Java_frame" fields are set since
// as soon as last_Java_sp != NULL the has_last_Java_frame is true and
// users will look at the other fields.
//
Node *adr_sp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_sp_offset()));
Node *last_sp = basic_plus_adr(top(), frameptr(), (intptr_t) STACK_BIAS);
store_to_memory(NULL, adr_sp, last_sp, T_ADDRESS, NoAlias);
// Set _thread_in_native
// The order of stores into TLS is critical! Setting _thread_in_native MUST
// be last, because a GC is allowed at any time after setting it and the GC
// will require last_Java_pc and last_Java_sp.
Node* adr_state = basic_plus_adr(top(), thread, in_bytes(JavaThread::thread_state_offset()));
//-----------------------------
// Compute signature for C call. Varies from the Java signature!
const Type **fields = TypeTuple::fields(2*parm_cnt+2);
uint cnt = TypeFunc::Parms;
// The C routines gets the base of thread-local storage passed in as an
// extra argument. Not all calls need it, but its cheap to add here.
for( ; cnt<parm_cnt; cnt++ )
fields[cnt] = jdomain->field_at(cnt);
fields[cnt++] = TypeRawPtr::BOTTOM; // Thread-local storage
// Also pass in the caller's PC, if asked for.
if( return_pc )
fields[cnt++] = TypeRawPtr::BOTTOM; // Return PC
const TypeTuple* domain = TypeTuple::make(cnt,fields);
// The C routine we are about to call cannot return an oop; it can block on
// exit and a GC will trash the oop while it sits in C-land. Instead, we
// return the oop through TLS for runtime calls.
// Also, C routines returning integer subword values leave the high
// order bits dirty; these must be cleaned up by explicit sign extension.
const Type* retval = (jrange->cnt() == TypeFunc::Parms) ? Type::TOP : jrange->field_at(TypeFunc::Parms);
// Make a private copy of jrange->fields();
const Type **rfields = TypeTuple::fields(jrange->cnt() - TypeFunc::Parms);
// Fixup oop returns
int retval_ptr = retval->isa_oop_ptr();
if( retval_ptr ) {
assert( pass_tls, "Oop must be returned thru TLS" );
// Fancy-jumps return address; others return void
rfields[TypeFunc::Parms] = is_fancy_jump ? TypeRawPtr::BOTTOM : Type::TOP;
} else if( retval->isa_int() ) { // Returning any integer subtype?
// "Fatten" byte, char & short return types to 'int' to show that
// the native C code can return values with junk high order bits.
// We'll sign-extend it below later.
rfields[TypeFunc::Parms] = TypeInt::INT; // It's "dirty" and needs sign-ext
} else if( jrange->cnt() >= TypeFunc::Parms+1 ) { // Else copy other types
rfields[TypeFunc::Parms] = jrange->field_at(TypeFunc::Parms);
if( jrange->cnt() == TypeFunc::Parms+2 )
rfields[TypeFunc::Parms+1] = jrange->field_at(TypeFunc::Parms+1);
}
const TypeTuple* range = TypeTuple::make(jrange->cnt(),rfields);
// Final C signature
const TypeFunc *c_sig = TypeFunc::make(domain,range);
//-----------------------------
// Make the call node
CallRuntimeNode *call = new (C)
CallRuntimeNode(c_sig, C_function, name, TypePtr::BOTTOM);
//-----------------------------
// Fix-up the debug info for the call
call->set_jvms( new (C) JVMState(0) );
call->jvms()->set_bci(0);
call->jvms()->set_offsets(cnt);
// Set fixed predefined input arguments
cnt = 0;
for( i=0; i<TypeFunc::Parms; i++ )
call->init_req( cnt++, map()->in(i) );
// A little too aggressive on the parm copy; return address is not an input
call->set_req(TypeFunc::ReturnAdr, top());
for( ; i<parm_cnt; i++ ) // Regular input arguments
call->init_req( cnt++, map()->in(i) );
call->init_req( cnt++, thread );
if( return_pc ) // Return PC, if asked for
call->init_req( cnt++, returnadr() );
_gvn.transform_no_reclaim(call);
//-----------------------------
// Now set up the return results
set_control( _gvn.transform( new (C) ProjNode(call,TypeFunc::Control)) );
set_i_o( _gvn.transform( new (C) ProjNode(call,TypeFunc::I_O )) );
set_all_memory_call(call);
if (range->cnt() > TypeFunc::Parms) {
Node* retnode = _gvn.transform( new (C) ProjNode(call,TypeFunc::Parms) );
// C-land is allowed to return sub-word values. Convert to integer type.
assert( retval != Type::TOP, "" );
if (retval == TypeInt::BOOL) {
retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFF)) );
} else if (retval == TypeInt::CHAR) {
retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFFFF)) );
} else if (retval == TypeInt::BYTE) {
retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(24)) );
retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(24)) );
} else if (retval == TypeInt::SHORT) {
retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(16)) );
retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(16)) );
}
map()->set_req( TypeFunc::Parms, retnode );
}
//-----------------------------
// Clear last_Java_sp
store_to_memory(NULL, adr_sp, null(), T_ADDRESS, NoAlias);
// Clear last_Java_pc and (optionally)_flags
store_to_memory(NULL, adr_last_Java_pc, null(), T_ADDRESS, NoAlias);
#if defined(SPARC)
store_to_memory(NULL, adr_flags, intcon(0), T_INT, NoAlias);
#endif /* defined(SPARC) */
#ifdef IA64
Node* adr_last_Java_fp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_fp_offset()));
if( os::is_MP() ) insert_mem_bar(Op_MemBarRelease);
store_to_memory(NULL, adr_last_Java_fp, null(), T_ADDRESS, NoAlias);
#endif
// For is-fancy-jump, the C-return value is also the branch target
Node* target = map()->in(TypeFunc::Parms);
// Runtime call returning oop in TLS? Fetch it out
if( pass_tls ) {
Node* adr = basic_plus_adr(top(), thread, in_bytes(JavaThread::vm_result_offset()));
Node* vm_result = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false);
map()->set_req(TypeFunc::Parms, vm_result); // vm_result passed as result
// clear thread-local-storage(tls)
store_to_memory(NULL, adr, null(), T_ADDRESS, NoAlias);
}
//-----------------------------
// check exception
Node* adr = basic_plus_adr(top(), thread, in_bytes(Thread::pending_exception_offset()));
Node* pending = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false);
Node* exit_memory = reset_memory();
Node* cmp = _gvn.transform( new (C) CmpPNode(pending, null()) );
Node* bo = _gvn.transform( new (C) BoolNode(cmp, BoolTest::ne) );
IfNode *iff = create_and_map_if(control(), bo, PROB_MIN, COUNT_UNKNOWN);
Node* if_null = _gvn.transform( new (C) IfFalseNode(iff) );
Node* if_not_null = _gvn.transform( new (C) IfTrueNode(iff) );
assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before");
Node *exc_target = makecon(TypeRawPtr::make( StubRoutines::forward_exception_entry() ));
Node *to_exc = new (C) TailCallNode(if_not_null,
i_o(),
exit_memory,
frameptr(),
returnadr(),
exc_target, null());
root()->add_req(_gvn.transform(to_exc)); // bind to root to keep live
C->init_start(start);
//-----------------------------
// If this is a normal subroutine return, issue the return and be done.
Node *ret;
switch( is_fancy_jump ) {
case 0: // Make a return instruction
// Return to caller, free any space for return address
ret = new (C) ReturnNode(TypeFunc::Parms, if_null,
i_o(),
exit_memory,
frameptr(),
returnadr());
if (C->tf()->range()->cnt() > TypeFunc::Parms)
ret->add_req( map()->in(TypeFunc::Parms) );
break;
case 1: // This is a fancy tail-call jump. Jump to computed address.
// Jump to new callee; leave old return address alone.
ret = new (C) TailCallNode(if_null,
i_o(),
exit_memory,
frameptr(),
returnadr(),
target, map()->in(TypeFunc::Parms));
break;
case 2: // Pop return address & jump
// Throw away old return address; jump to new computed address
//assert(C_function == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C), "fancy_jump==2 only for rethrow");
ret = new (C) TailJumpNode(if_null,
i_o(),
exit_memory,
frameptr(),
target, map()->in(TypeFunc::Parms));
break;
default:
ShouldNotReachHere();
}
root()->add_req(_gvn.transform(ret));
}
Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, const TypePtr* adr_type, bool require_atomic_access = false) {
// This version computes alias_index from an address type
assert(adr_type != NULL, "use other make_load factory");
return make_load(ctl, adr, t, bt, C->get_alias_index(adr_type),
require_atomic_access);
}
// Create a LoadNode, reading from the parser's memory state.
// (Note: require_atomic_access is useful only with T_LONG.)
Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
bool require_atomic_access = false) {
// This version computes alias_index from bottom_type
return make_load(ctl, adr, t, bt, adr->bottom_type()->is_ptr(),
require_atomic_access);
}
//---------------------------catch_call_exceptions-----------------------------
// Put a Catch and CatchProj nodes behind a just-created call.
// Send their caught exceptions to the proper handler.
// This may be used after a call to the rethrow VM stub,
// when it is needed to process unloaded exception classes.
void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
// Exceptions are delivered through this channel:
Node* i_o = this->i_o();
// Add a CatchNode.
GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1);
GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL);
GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0);
for (; !handlers.is_done(); handlers.next()) {
ciExceptionHandler* h = handlers.handler();
int h_bci = h->handler_bci();
ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
const TypePtr* h_extype = TypeOopPtr::make_from_klass_unique(h_klass)->cast_away_null();
// Ignore exceptions with no implementors. These cannot be thrown
// (without class loading anyways, which will deopt this code).
if( h_extype->empty() ) continue;
// Do not introduce unloaded exception types into the graph:
if (!h_klass->is_loaded()) {
if (saw_unloaded->contains(h_bci)) {
/* We've already seen an unloaded exception with h_bci,
so don't duplicate. Duplication will cause the CatchNode to be
unnecessarily large. See 4713716. */
continue;
} else {
saw_unloaded->append(h_bci);
}
}
// Note: It's OK if the BCIs repeat themselves.
bcis->append(h_bci);
extypes->append(h_extype);
}
int len = bcis->length();
CatchNode *cn = new (C, 2) CatchNode(control(), i_o, len+1);
Node *catch_ = _gvn.transform(cn);
// now branch with the exception state to each of the (potential)
// handlers
for(int i=0; i < len; i++) {
// Setup JVM state to enter the handler.
PreserveJVMState pjvms(this);
// Locals are just copied from before the call.
// Get control from the CatchNode.
int handler_bci = bcis->at(i);
Node* ctrl = _gvn.transform( new (C, 1) CatchProjNode(catch_, i+1,handler_bci));
// This handler cannot happen?
if (ctrl == top()) continue;
set_control(ctrl);
// Create exception oop
const TypeInstPtr* extype = extypes->at(i)->is_instptr();
Node *thread = _gvn.transform( new (C, 1) ThreadLocalNode() );
Node*ex_adr=basic_plus_adr(top(),thread,in_bytes(JavaThread::pending_exception_offset()));
int pending_ex_alias_idx = C->get_alias_index(ex_adr->bottom_type()->is_ptr());
Node *ex_oop = make_load( NULL, ex_adr, extype, T_OBJECT, pending_ex_alias_idx );
Node *ex_st = store_to_memory( ctrl, ex_adr, null(), T_OBJECT, pending_ex_alias_idx );
record_for_igvn(ex_st);
// Handle unloaded exception classes.
if (saw_unloaded->contains(handler_bci)) {
// An unloaded exception type is coming here. Do an uncommon trap.
// We do not expect the same handler bci to take both cold unloaded
// and hot loaded exceptions. But, watch for it.
if(PrintOpto&&extype->is_loaded()){
C2OUT->print_cr("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ",handler_bci);
method()->print_name(C2OUT);C2OUT->cr();
}
// Emit an uncommon trap instead of processing the block.
set_bci(handler_bci);
push_ex_oop(ex_oop);
uncommon_trap(Deoptimization::Reason_unloaded,extype->klass(),"not loaded exception",false);
set_bci(iter().cur_bci()); // put it back
continue;
}
// go to the exception handler
if (handler_bci < 0) { // merge with corresponding rethrow node
throw_to_exit(make_exception_state(ex_oop));
} else { // Else jump to corresponding handle
push_ex_oop(ex_oop); // Clear stack and push just the oop.
merge_exception(handler_bci);
}
}
// The first CatchProj is for the normal return.
// (Note: If this is a call to rethrow_Java, this node goes dead.)
set_control(_gvn.transform( new (C, 1) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
}
