// Encapsulates a code change request. There are 3 types. // General instruction, jump instruction, and table/lookup switches //
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 int _bci; public:
// ChangeItem : public ResourceObj { virtualbool handle_code_change(Relocator *r) = 0;
// type info virtualbool is_switch_pad() { returnfalse;
// accessors
( _bci void
virtualbool adjust(int bci, int delta) { returnfalse; }
// debug virtualvoid print() = 0;
};
classpublicChangeItem int bci( {return_bci;}
u_char* _inst_buffer; // New bytecodes
:
ChangeWidenjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
_ = java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 25
i ;
}
// Callback to do instruction boolintbci,int , ):ChangeItem(ci {
void _new_ilen=new_ilen
}
class // Callback to
java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 100
// If the bci matches, adjust the delta in the change jump request.Change( bci,intdelta) ( { _elta java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
// if(()=jump_bci if (_delta > 0)
_ =delta; else
_ =deltajava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24 returnelse
}
() -print_crChangeJumpWiden.bci:% : d" (,_elta) java.lang.StringIndexOutOfBoundsException: Index 104 out of bounds for length 104
}
void print() { tty->print_cr("java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 8
};
classjava.lang.StringIndexOutOfBoundsException: Range [23, 21) out of bounds for length 43
Relocator -java.lang.StringIndexOutOfBoundsException: Range [79, 70) out of bounds for length 110 bool _is_lookup_switch; public: intbci, java.lang.StringIndexOutOfBoundsException: Range [63, 62) out of bounds for length 83
p=padding
_java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
//----------------------------------------------------------------------------------------------------------- bool java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 17
bool is_switch_pad() { returntrue; } int padding() { return _java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 16
h) return i;}
( { -print_cr(ChangeSwitchPad.bci: % :% IsLookupSwitch %, ci),padding,_s_lookup_switch) java.lang.StringIndexOutOfBoundsException: Index 147 out of bounds for length 147
};
Relocator:RelocatorcmethodHandle& ,RelocatorListener*listener
;
(method)>);
set_code_array(NULL); // Allocate code array and copy bytecodes
(expand_code_array0) // Should have at least MAX_METHOD_LENGTH available or the verifier // would have failed.
// instruction size, we will shrink themethodHandleRelocator:(nt , int ,u_char [,TRAPSjava.lang.StringIndexOutOfBoundsException: Index 89 out of bounds for length 89
){
()java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
t_compressed_line_number_table_size0);
_listener = listener;
}
// size is the new size of the instruction at bci. Hence, if size is less than the current // instruction size, we will shrink the code.
atint size u_char ){
_
_methodHandlejava.lang.StringIndexOutOfBoundsException: Range [27, 25) out of bounds for length 65
if (TraceRelocator)java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
_print()java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
_-java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 0
>java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 32
}
(handle_code_changes))return ();
// Construct the new method
methodHandle new_method = Method::clone_with_new_dataassert_changes !NULL, "changes vector mustbe )
) java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
compressed_line_number_table(),
compressed_line_number_table_size ci->)java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
CHECK_methodHandle())java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
// Deallocate the old Method* from metadata
ClassLoaderData* loader_data=method)>)class_loader_data(;
loader_data->add_to_deallocate_list(method()());
set_method(new_method)}
if (TraceRelocator) {
tty>"---------------------------";
tty return;
_method->print_codes
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
return new_method;
}
bool java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
assertchanges !NULL must be )
caseBytecodes::fast_linearswitch // Inv: everything is aligned.
ChangeItem* ci = _changes- default: (;
if (TraceRelocator}
ci-// We need a special instruction size method, since lookupswitches and tableswitches might// properly aligned during relocation
}
// Execute operation switch(){
// Shuffle items up for (int case Bytecodes:_:
_changes->case Bytecodes::_fast_linearswitch:
}
_changes->pop();
} returntrue;
}
boolint =bci, is_opcode_lookupswitch(c)java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69 switch() { case Bytecodes: } case :_: // not rewritten on ia64 switch (bc { caseBytecodes:_fast_binaryswitch: returntrue; // rewritten _lookupswitch default: ShouldNotReachHere();
} true; // dummy
}
// We need a special instruction size method, since lookupswitches and tableswitches might not be // properly aligned during relocation int Relocator:: int =hi- o+ 1
::Code =code_atbci); switch (bc) {
Bytecodes:_ookupswitch: // padding recorded. caseBytecodes:_: case Bytecodes::_lookupswitch: case Bytecodes::_fast_linearswitch: case Bytecodes::_=( +pad + *)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
{ int pad } if (pad == -1) { return instruction_length_at(bci);
} // Otherwise, depends on the switch type.
bc casebreakjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12 int lo = int_at(bci return java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 36
Relocatorget_orig_switch_pad(int bci { for( =0;k< changes-length) k+ { return1 + + *3 );
} case Bytecodes:lookupswitch case Bytecodes::_fast_linearswitch: caseBytecodes:fast_binaryswitch:{ int java.lang.StringIndexOutOfBoundsException: Range [0, 20) out of bounds for length 7 return1 ChangeJumpWiden if it doesn't already exist on the work queue,
} default:
void Relocator:push_jump_widenintintintnew_delta {
}
} default: break;
} return instruction_length_at(bci)}
} // The current instruction of "c" is a jump; one of its offset starts // If a change item is recorded for "pc", with type "ct", returns the // associated padding, else -1. int Relocatorvoid Relocator:int ,bool is_short, is_short, intbreak_bci, intdelta) {
java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 65
ChangeItem* ci = _changes->at(k); if (ci->is_switch_pad()) {
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0 if (csp->is_lookup_switch() =bci>break_bci& targ=break_bci) { return csp->padding();
}
}
} return -1;
}
// Push a ChangeJumpWiden if it doesn't already exist on the work queue, // otherwise adjust the item already there by delta. The calculation for // new_delta is wrong for this because it uses the offset stored in the // code stream itself which wasn't fixed when item was pushed on the work queue. void Relocator::push_jump_widen(int bci ( {
->) j+ java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
ChangeItem ci= _changes-at(j); if (ci->adjust(bci, delta)) return;
}
_
}
// The current instruction of "c" is a jump; one of its offset starts // at "offset" and is a short if "isShort" is "TRUE", // and an integer otherwise. If the jump crosses "breakPC", change // the span of the jump by "delta". void::(ntbci int offset is_short,intbreak_bci,int delta { int is_short short_atoffset offset)java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65 int targ = bci + bci_delta;
if ((bci <= break_bci && targ > break_bci) ||
( while (ci < code_length()) { int new_delta; if (bci_delta > 0)
new_delta = bci_delta + delta; else
new_delta=bci_delta - delta;
// Changes all jumps crossing "break_bci" by "delta". May enqueue things // on "rc->changes"
break_bci,intdelta java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 int ;
Bytecodes:caseBytecodes:_if_icmple: / Now, adjust any affected instructions. while (bci<code_length() switch (bc= code_at(bci)) {
Bytecodes:ifeq case Bytecodes :ifnonnull case Bytecodes::_iflt: case Bytecodes::_ifge:
Bytecodes:ifgt:
s::_java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 28 case Bytecodes::_if_icmpeq: case Bytecodes::_if_icmpne:
::: case Bytecodes::_if_icmpge: case Bytecodes::_if_icmpgt: caseBytecodes:_if_icmple
Bytecodes:_: case Bytecodes::case :_:
java.lang.StringIndexOutOfBoundsException: Range [29, 10) out of bounds for length 30 caseoldPad r =-1) : alignbci+)- bci)java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70 case Bytecodes::_ int newPad = align n+ -n+1)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54 case :_jsrjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
bci bci1,,break_bci,delta); break; case Bytecodes::_goto_w: caseBytecodes:_sr_w:
java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 13 break; case :tableswitch: case Bytecodes::_lookupswitch: case Bytecodes::_fast_linearswitch: case Bytecodes::_:{ int recPad = case Bytecodes::_tableswitch int != 1)?recPad (bci1)-bci); if (bci > break_bci) { int new_bciint lo =int_at( oldPad + 4 * 1); int int hihi bci + oldPad 2) // Do we need to check the padding? if (newPad !for ( k 0; ;+) if (recPad == -1) {
}
}
}
java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 9
case Bytecodes::_fast_linearswitch: switch (bc) {
:_ 1falsebreak_bci, ;
change_jump( 1 , ; // We cannot use the Bytecode_tableswitch abstraction, since the padding might not be correct.
* 1); int hi = int_at(bci + 1 +for(nt 0 < npairs;k+ {
nt = hi - +1 for (int k = 0; k < n; k++) { /* Special next-bci calculation here... */
java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 // Special next-bci calculation here...
+ Relocator:adjust_exception_table( bci,int){ continue;
} case Bytecodes::_lookupswitch: case Bytecodes::_fast_linearswitchfor (nt = 0;index<table.) index+)java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57 case:_fast_binaryswitch
, bci+ oldPad,false, ,delta)java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71 // We cannot use the Bytecode_lookupswitch abstraction, since the padding might not be correct. int npairs java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
= 0 k<npairs; ++ java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
change_jump(bci
} /* Special next-bci calculation here... */
bci += 1 + oldPad +if(method()-has_linenumber_table() { continue;
} default:
ShouldNotReachHere();
}
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 default.(.( adjustment .();
sjava.lang.StringIndexOutOfBoundsException: Range [57, 41) out of bounds for length 61
bci += rc_instr_len(bci);
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
}
// The width of instruction at "pc" is changing by "delta". Adjust the // exception table, if any, of "rc->mb". void(intbci int delta { forinti=0;i<localvariable_table_length i+){
java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 42 if(urrent_bci {
set_start_pc(index start_pcindex +delta)
} els} else {
} elseif(bci < table.end_pc()) {
table.set_end_pc(index, table.end_pc(index) + delta);
} if (table.handler_pc(index) > bci)
table.index,table.index) + delta)
}
}
// The width of instruction at "bci" is changing by "delta". Adjust the line number table. void java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 if (method()->has_linenumber_table()) {
CompressedLineNumberReadStream ssLoaderData*,
CompressedLineNumberWriteStream writer(64) // plenty big for most line number tables while (reader.read_pair()) { int adjustment = (reader.bci() > bci) THREAD =JavaThread:urrent) // For exception macros.
writer.write_pair(reader. MetadataFactory::new_array<uloader_data,src>) 0 CHECK_NULL;
}
address =addresssrc>java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 45
memcpy(dst_addr + where + hole_sz,
set_compressed_line_number_table_size(writer.position());
}
}
// The width of instruction at "bci" is changing by "delta". Adjust the local variable table. void Relocator::java.lang.StringIndexOutOfBoundsException: Range [0, 27) out of bounds for length 14
=)-localvariable_table_length; if (localvariable_table_length > 0) {
LocalVariableTableElement" be ofthe compressed "; for ( i 0;i< localvariable_table_length i+{
u2 current_bci = table[i].start_bci; if (current_bci > bci) {
table[i].start_bci = current_bci + delta;
} else {
u2 current_length = table[i].length// convert these frames to the extended versions, but the extended if (current_bci + current_length > bci) {
tablei.length current_length + delta;
}
}
}
}
}
// Create a new array, copying the src array but adding a hole at // the specified location static Array<u1>* insert_hole_atextended version oftheframe
u1>*src){
JavaThread* THREAD = JavaThread::current(); // For exception macros.
Array<u1>* dst =
MetadataFactory::new_array<u1>(loader_data =method()>()->class_loader_data()
// The width of instruction at "bci" is changing by "delta". Adjust the stack // map frames.
address frame_addr =address(-adr_at0 )
(()->as_stackmap_table()) {
Array<u1>* data java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 // The data in the array is a classfile representation of the stackmap table
java.lang.StringIndexOutOfBoundsException: Range [8, 19) out of bounds for length 9
stack_map_table::at((address)data->adr_at(0));
int
// The stack map frame may contain verification types, if so we need to bool offset_adjusted = false; // only need to adjust one offset
i 0;i<count +)
types=>ypes()java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
bci_iter += offset_delta;
if (!offset_adjusted && bci_iter > bci) {
=+java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
if (frame->is_valid_offset(new_offset_delta)) }
frame->
}java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
assert(java.lang.StringIndexOutOfBoundsException: Range [6, 1) out of bounds for length 46
-java.lang.StringIndexOutOfBoundsException: Range [58, 57) out of bounds for length 60
Frame of java.lang.StringIndexOutOfBoundsException: Range [60, 59) out of bounds for length 62
// 'same_frame_1_stack_item_frame' frame types. We need to // convert these frames to the extended versions, but the extended // version is bigger and requires more room. So we allocate a // new array and copy the data, being sure to leave u2-sized hole // right after the 'frame_type' for the new offset field. //
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
/can stillbe in an .
java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 74
ClassLoaderData* loader_datamethod(-sd;// in case it has changed
Array if (new_data == java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return; // out-of-memory?
} // Deallocate old data
MetadataFactory::free_array<u1
data = new_data;
frame_addr =((>0 ;
frame = stack_map_frame::atlengthjava.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 33
// Now convert the frames in place if
har* = unsigned ;
}else{
same_locals_1_stack_item_extended::create_at
java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 50
ation_info_type should be at right
}
}
java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 79 // values are offsets from the current
}
/ The stack map frame may contain verification types, if so we need to // check and update any Uninitialized type's bci (no matter where it is).
set_codjava.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 32 returntrue
for (int i = 0; i < number_of_types; if (types// The instruction at "bci", whose size is "ilen// "delta". Reallocate, move code, recalculate jumps, and enqueue
-types>) ;
}
types = types->next();
}
// Full frame has stack values too
full_frame* ff = frame->as_full_frame(); if (ff != // Expand allocated
types
number_of_typesfalsejava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
types = ff->stack}
} if (types->is_uninitialized() && types->bci
types->set_bci(types->bci() + assert(((intptr_t)code_array() & 3) == 0, "chalignment)java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
}
types = types->next();
}
}
frame = frame->next();
}
)>d)
}
}
bool Relocator::expand_code_array(int delta) { int java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 3
if (length > MAX_METHOD_LENGTH) {
d= &code_length) =MAX_METHOD_LENGTH) java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
length = MAX_METHOD_LENGTH;
} else {
;
}
}
unsigned// Line number tables... if (!adjust_line_no_tablebci,delta;
// Expanding current array if ( adjust_local_var_table(bci, delta);
memcpy(new_code_array, code_array(), code_length());
} else { // Initial copy. Copy directly from Method*
memcpy(new_code_array, method()->code_base(), code_length adjust_stack_map_tableb,delta)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
intj ;j <_>length(;+){
// The instruction at "bci", whose size is "ilen", is changing size by // "delta". Reallocate, move code, recalculate jumps, and enqueue // change items as necessary. bool Relocator::relocate_code(int bci, int ilen, int delta) { int next_bci = bci +ilen; if (delta > 0 } // Expand allocated code space, if necessary. if (!expand_code_array returnfalse;
}
}
// We require 4-byte alignment of code arrays. int =rc_instr_len(bci; // Change jumps before doing the copying; this routine requires aligned switches.
;
// In case we have shrunken a tableswitch/lookupswitch statement, we store the last // bytes that get overwritten. We have to copy the bytes after the change_jumps method
/has beencalled it is likely to update last offset in atableswitch/
assert(delta >= -3, java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 3 if (delta < 0 && delta >= -3) {
memcpy(_overwrite, addr_at(bci + ilen + delta), -delta);
}
memmove(addr_at(next_bci + delta), addr_at(next_bci), code_length() - next_bci);
set_code_length(code_length() + delta);
Also adjust exceptiontables..
adjust_exception_table(bci, delta);
/ Line numbertables..
adjust_line_no_table(bci, delta); // And local variable table...
adjust_local_var_table:Code =code_at(ci)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
/java.lang.StringIndexOutOfBoundsException: Range [17, 11) out of bounds for length 22
adjust_stack_map_tablejava.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 26
// Relocate the pending change stack...Bytecodes:ifge forcase Bytecodes::ifgt:
ChangeItem* ci = _changes->at(j);
ci->relocate(bci, delta);
}
// Notify any listeners about code relocation
notifybci delta,code_length());
returntrue;
}
// relocate a general instruction. Called by ChangeWiden class boolRelocator::(ntjava.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75 int ilen = rc_instr_len(bci);
de(bci, , new_ilen - ilen)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49 returnfalse;
// handle jump_widen instruction. Called be ChangeJumpWiden class bool Relocator:handle_jump_widenint bci intdelta) { int ilen = rc_instr_len(bci);
Bytecodes:: =code_at()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 switch (bc) { case Bytecodes::_ifeq: case Bytecodes::_ifne: case Bytecodes::_iflt: case Bytecodes::_ifge: case Bytecodes::_ifgt: case Bytecodes:_java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 case Bytecodes::_if_icmpeq: case Bytecodes::_if_icmpne: case Bytecodes::_if_icmplt: case Bytecodes::_if_icmpge: case Bytecodes::_if_icmpgt: case Bytecodes::_if_icmple:
:if_acmpeq: case if(relocate_codebci,3, /*delta*/add_bci)) return false; case Bytecodes::_ifnonnull: {
=Bytecodes:B:_oto)
// If 'if' points to the next bytecode after goto, it's already handled. // it shouldn't be.
assert // goto around
assert(ilen == 3, "check length");
if (!relocate_code(bci, 3, /*delta*/add_bci)) return false;
// if bytecode points to goto_w instructioncode_at_put(,Bytecodes::goto_w;
short_at_put(bci + 1, ilen + goto_length);
int cbci = +2//goto_w 2 than" // goto around
(, :_oto)
short_at_put(cbci + 1, add_bci);
java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
cbci = java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 0
code_at_put if (delta > 0) {
;// goto_w is 2 bytes more than "if" code
} else {
delta -break
}
int_at_putcbci 1 ); break;
} case Bytecodes::_goto: case java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 1
assert =check length"java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
if (!relocate_code(bci, 3, int = if (bc == Bytecodes:goto
code_at_put(, Bytecodes:_goto_w; else
code_at_put(bci, Bytecodes::_jsr_w);
// If it's a forward jump, add 2 for the widening. if (delta > 0) delta += 2;
int_at_put(bci + 1, len = high-ow13; break;
default: ShouldNotReachHere();
}
returntrue;
}
// handle lookup/table switch instructions. Called be ChangeSwitchPad class bool Relocator need that beforemessingwith the int ilen =// instruction when moving down, remember the possibly
/ java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
d; if (pad_delta ! if pad_delta <0 int len; if (!is_lookup_switch) { int java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 35 int high = int_at(bci+1+old_pad+8); _overwrite, -pad_delta)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
len =
} elsememmove(addr_at+ +new_pad), int=bci+1+java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 43
len = npairs*2 +( 1, ,new_pad);
} // Because "relocateCode" does a "changeJumps" loop, // which parses instructions to determine their length,true // we need to call that before messing with the current // instruction. Since it may also overwrite the current // instruction when moving down, remember the possibly // overwritten part.
// Move the code following the instruction... if (!relocate_code(bci, ilen, pad_delta)) returnfalse;
if (pad_delta < 0) { // Move the shrunken instruction down.
memmove(addr_at(bci + 1 + new_pad),
addr_at(bci + 1 + old_pad),
len * 4 + pad_delta);
memmove(addr_at(bci + 1 + new_pad + len*4 + pad_delta),
_overwrite, -pad_delta);
} else {
assert(pad_delta > 0, "check"); // Move the expanded instruction up.
memmove(addr_at(bci +1 + new_pad),
addr_at(bci +1 + old_pad),
len * 4);
memset(addr_at(bci + 1), 0, new_pad); // pad must be 0
}
} returntrue;
}
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