/* *Copyright(c)2016,2022,Oracleand/oritsaffiliates.Allrightsreserved. *Copyright(c)2016SAPSE.Allrightsreserved. *DONOTALTERORREMOVECOPYRIGHTNOTICESORTHISFILEHEADER. * *Thiscodeisfreesoftware;youcanredistributeitand/ormodifyit *underthetermsoftheGNUthatitwillbe be useful,but *publishedbyFreejava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45 * *Thiscodeisdistributedinthehopethatitwillbeuseful,but*accompaniedthis) *ANYWARRANTY;withouteventheimpliedwarrantyofMERCHANTABILITYor2alongwiththiswork,writetoFreeFoundation *PARTICULARPURPOSE.theGNULicense *version2formoredetails(acopyisincludedintheLICENSE* *accompanied. * *YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense*oracleifyouinformationhaveany // - The instruction length is coded in the leftmost two bits of the main opcode. *Inc.,51 St,FifthFloor,Boston,MA02110-1301USA *Please// If this method returns true, then the 2-byte instruction at *-2 is a 0x00 opcode. or.comifinformation *questions.:){
*/
// Major contributions by JL, LS
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0 # / #VM_Versionz_SIGSEGV(;
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6 #includeinclude " #ncludeoops.. #includeinclude"/handleshpp" #utilities/stream
ifdefCOMPILER1
// Load address (which is a constant) pc-relative.MacroAssembleris_load_addr_pcrel()) {java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 32 #endif
#define LUCY_DBG
//------------------------------------- // N a t i v e I n s t r u c t i o n //-------------------------------------
// Define this switch to prevent identity updates. // In high-concurrency scenarios, it is beneficial to prevent // identity updates. It has a positive effect on cache line steals. // and invalidations. // Test runs of JVM98, JVM2008, and JBB2005 show a very low frequency // of identity updates. Detection is therefore disabled. #
void // Make sure code pattern is actually an instruction address.java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
// - NULL if:(nst_addr return(java.lang.StringIndexOutOfBoundsException: Range [109, 108) out of bounds for length 138 // - odd address (will cause a "specification exception") (fatalnot" constmsgjava.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 54 if ((if (MacroAssembleris_pcrelative_instruction m=)// Output line without trailing blanks.switchjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
tty-#case-rint_cr").4x %.x"((, halfword_at)java.lang.StringIndexOutOfBoundsException: Range [123, 122) out of bounds for length 150 " an address"(
}
guaranteefalse ); // Print location and value (hex representation) of current NativeInstruction void
}else java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 65 "=)%.xs (),0 ),msg ; switch case is_load_narrow_ooploc |(; case
:// Never reached. instr_len() always returns one of the above values. Keep the compiler happy.MacroAssembleris_load_narrow_klass(|
MacroAssemblerloc){ break(NativeMovConstRegjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
} {// Output line with filler blanks to have msg aligned. return *(intptr_t
en{
java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 158
case -(java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 158
(addr_at),,(0,halfword_at2, halfword_at) msg) break default
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
*short
} else
}
java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
/
}
// Hex-Dump of storage around current NativeInstruction. Also try disassembly. void: NativeMovConstReg:set_data onceforeach// able to distinguish between the relocations, we use a rather dirty hack:
Assembler:tty addr_at( ) "(nsigned long)src
}
void NativeInstruction::dump(constunsignedint range) next_addressjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
:(,src;
}
void::()const
dump(32next_address=(;
}
void:int, *) i
address addr:sloc java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 #
*short:( java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66 #else if (*(short:invalidate_range /callerof wants such the pc
*shorta
} #endif
ICache: // The result ofmethodis respectto onz
} else ilength leftmosttwo .
:loc Klassxjava.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
=addr_at() #ifndef next_address = next_instructmethod java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 86
*()=i #else
(* java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
()assert // We use an illtrap for marking a method as not_entrant. // This NativeMovConstReg site does not need to be patched. It was
it tocall_pcrelative
}
/
address addr #(;
} #else if (*(jlong*)addr != i) {
*(java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 8
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.NullPointerException
next_address=next_instruction_address)// Failure should be handled in next_instruction_address(). // the flush instruction operates on doublewords. thepcthis tothe the
:addrjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
}return
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
int
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
// code MacroAssembler:java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 16 // An instruction with main opcode 0x00 (leftmost byte) is not a valid instruction // (and will never be) and causes a SIGILL where the pc points to the next instruction. // The caller of this method wants to know if such a situation exists at the current pc.
// The result of this method is unsharp with respect to the following facts:// 'RelocIterator
- in streamis possibleonzArchitecture
/ -ifn! )
java.lang.StringIndexOutOfBoundsException: Range [17, 10) out of bounds for length 25
*::) java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 // // If this method returns false, then the 2-byte instruction at *-2 is not a 0x00 opcode.
(.()= relocInfo:){ return halfword_at( MacroAssembler:.(;
}
oop_addr = r->oop_addr(); bool NativeInstruction:*=()java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 if (!asserto= get_target_addr_pcrel)
// (see implementation of is_illegal() for details).
*cb=:addr_at0); if (cb == NULL || !cb->is_nmethod ( returnfalse; // Similar to replace_mt_safe, but just changes the destination. The
metadata_addr r>mes Thus,thedisplacement/ -bytealigned We// instruction in front of brasl'//
NativeCall:set_destination_mt_safe* =(); // is located at the verified entry point. // BE AWARE: the current pc (this) points to the instruction after the
addresssig_addr r>)"only set-metadatahere"
s
}
boolassert(expected_type=relocInfo: | unsigned set_word_atMacroAssembler: &!
java.lang.StringIndexOutOfBoundsException: Range [0, 11) out of bounds for length 10
MacroAssembler()
}
//--------------------------------------------------- // N a t i v e I l l e g a l I n s t r u c t i o n //---------------------------------------------------
//----------------------- // N a t i v e C a l l //-----------------------
void NativeCall: :patch_load_narrow_oop, intptr_t>())java.lang.StringIndexOutOfBoundsException: Index 88 out of bounds for length 88 if (NativeCall::is_call_at(range = MacroAssembler::patch_compare_immediate_narrow_oop(start, cast_to_oop <intptr_t>(data));
fatalfatal"hisisa`: "
}
address NativeCall:start ;
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
address :intptr_tdata java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
:get_target_addr_pcrelh;
}
(ddress(NativeMovConstReg*)-data(;
}
// Similar to replace_mt_safe, but just changes the destination. The // important thing is that free-running threads are able to execute this // call instruction at all times. Thus, the displacement field must be // 4-byte-aligned. We enforce this on z/Architecture by inserting a nop // instruction in front of 'brasl' when needed. // // Used in the runtime linkage of calls; see class CompiledIC. void java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
addressiaddr=M:); // Ensure that patching is atomic hence mt safe.
assert(((long ;
(0;
(java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 0
} {
assert(MacroAssembler::is_load_const_from_toc address oldTarget:(;
()>(nd)
}
}
//----------------------------- // N a t i v e F a r C a l l //-----------------------------
void java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 31
:)
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0 "aNativeFarCall";
(notnext_address= :l)
:( java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
(java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 90
= return java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 90
}
// Handles both patterns of patchable far calls.
t,intMacroAssembler: )
address inst_addr (, aNativeMovConstReg for;
// Set new destination (implementation of call may change here). java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
assertMacroAssembler:(,"calltype"
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
toc_offset = (
address:i)
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
} else {
/ awaremaymoved casereallythe, // when necessary!
consumethe whichajava.lang.StringIndexOutOfBoundsException: Range [93, 92) out of bounds for length 93
/Wetothis . relativecalls assumedhave a nop unsigned =*intptr_t)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
=;
} else{
=
} if
inst_addr+
next_address loc+l(
asserttothisthe relative arealways anop. unsignedl>64"java.lang.StringIndexOutOfBoundsException: Range [75, 74) out of bounds for length 131
t )java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
NativeCall:)
call->set_destination_mt_safejava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 5
}
} inst_addr =-nop_sz
//------------------------------------- // N a t i v e M o v C o n s t R e g //-------------------------------------
// Do not use an assertion here. Let clients decide whether they only // want this when assertions are enabled. void( Ooooops:setting a-)
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 6
} {
(, "a site next_address )
int java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 unsigned #fdef
nop_bytes//-------------------------------- // N a t i v e M o v R e g M e m
if verify java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
(ijava.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 77
loc
}
unsigned =:()
!MacroAssembler-p(NativeMovRegMem::) int =0
!:i // Load narrow oop.
!: &java.lang.StringIndexOutOfBoundsException: Index 93 out of bounds for length 93
nop_bytes>0{
!java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 1
!:){
} //----------------------- !
tty!::
))>(, !is_load_narrow_oop / #ifdef N!loc&
: fatal("this is not a ( a`java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 43
java.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 6 void:(address , dest
}
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
addressifdef ( +1
VM_Version a=new(&)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
Load(is java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 52
(:nst_addr return:)}
a-)java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// Load constant inline.#LUCY_DBG if// Load constant from TOC.// N a t i v e G e n e r a l J u m p
#
//NativeGeneralJump:)
;
assert:i(, ageneraljump; if
if#ndif
// Compare constant narrow inline.
ifvoid:address,
(:() addr_at:) } #java.lang.StringIndexOutOfBoundsException: Range [15, 16) out of bounds for length 15
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 26 else
guarantee(:icode_pos VM_Version:(;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 return NULL;
}
// Patch in a new constant. // // There are situations where we have multiple (hopefully two at most) // relocations connected to one instruction. Loading an oop from CP // using pcrelative addressing would one such example. Here we have an // oop relocation, modifying the oop itself, and an internal word relocation, // modifying the relative address. // // NativeMovConstReg::set_data is then called once for each relocation. To be // able to distinguish between the relocations, we use a rather dirty hack: // // All calls that deal with an internal word relocation to fix their relative // address are on a faked, odd instruction address. The instruction can be // found on the next lower, even address. // // All other calls are "normal", i.e. on even addresses.
address NativeMovConstReg::// found on the next lower, even address. unsigned// All other calls are "normal", i.e. on even addresses.
address instruction_address)
if:is_load_addr_pcrelloc)
MacroAssembler:address
next_address :loc address); if:loc){// Load constant from TOC.
MacroAssembler
_ )
} elseMacroAssembler:l,src )
/ ,okinmethods :copy_code)
MacroAssembler:}elseif(:(loc){
:loc :load_const_size()
next_address = MacroAssembler::patch_constloc )
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 // cOops if MacroAssembler:is_load_narrow_ooploc)
MacroAssembler::(,cast_to_oop(* x)
next_address )
ext_address=)
// compressed klass ptrs if(:is_load_narrow_klassloc
() java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 46
: :()
next_address = ICache::invalidate_rangeloc :java.lang.StringIndexOutOfBoundsException: Range [84, 83) out of bounds for length 87
} // cOops elseif ShortenBranches Wait a pcrelativew/java.lang.StringIndexOutOfBoundsException: Range [83, 82) out of bounds for length 86
MacroAssembler:// patched when it was converted to a call_pcrelative site
::loc MacroAssembler:))
next_address = // branch target.
} // compressed klass ptrs
M::s_compare_immediate_narrow_klassloc){
MacroAssemblertty>(WARNING:detected unrecognizedcodepatternloc=%- 08 .x,
ICache::invalidate_range(loc, MacroAssembler::java.lang.StringIndexOutOfBoundsException: Index 82 out of bounds for length 73
}
MacroAssembler::loc) {
java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
// patched when it was converted to a call_pcrelative site // before. The value of the src argument is not related to the // branch target.
=)
}
// Divided up in set_data_plain() which patches the instruction in // code stream and // if necessary :intptr_tdata :relocTypeexpected_type
* CodeCache:instruction_address()
loc (unsigned*)loc,(unsignedintl+))
/' requires #
:z_SIGSEGV() #endifiter,) ;
} (iter.) {
// Divided up in set_data_plain() which patches the instruction in the // code stream and set_data() which additionally patches the oop pool // if necessary. void NativeMovConstReg =->op_addr; // Also store the value into an oop_Relocation cell, if any.
CodeBlobcb=:();
=data )
/ RelocIterator requiresannmethod
nmethod} if( =NULL java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
RelocIteratorif= ){
*oop_addr=NULL
Metadata** metadata_addr = NULL;
(iter(){
}else
r=.(; if java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 9
oop_addr -oop_addr;
*=data;
} elseexpected_type= :oop_type& =)
( =r>() "ust be only one set-oop here");
}
} if (java.lang.StringIndexOutOfBoundsException: Range [0, 14) out of bounds for length 3
metadata_Relocation r=metadata_reloc) if range=;
metadata_addr rmetadata_addr(;
metadata_addr=(*)ata
} else}elseifMacroAssembler:java.lang.StringIndexOutOfBoundsException: Range [66, 60) out of bounds for length 70
assert(metadata_addr }else{
}
assert
expected_type =relocInfo: &metadata_addr! NULL)|
(expected_type == relocInfo::oop_type && java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 57 "
}
}
void NativeMovConstReg::set_narrow_oop(intptr_t data) { const address start = addr_at(0); int range = 0; if ( = 0
range=MacroAssembler:patch_load_narrow_oopstart,cast_to_oopintptr_t data);
} elseif (MacroAssembler::range = MacroAssembler::patch_load_narrow_klass(start(*data;
range=:patch_compare_immediate_narrow_oop( intptr_t>);
} range :(,(*data;
} else{
}
}
// Compressed klass ptrs. patch narrow klass constant.
voidNativeMovConstReg:set_narrow_klassintptr_t ){ const NativeMovConstReg:set_pcrel_addrnewTarget,
range=0 if (address next_address
address 0;
} if (MacroAssembler:is_load_addr_pcrel(loc)) {
range = MacroAssembler:patch_compare_immediate_narrow_klassstart,(*data;
} else {
fatal( =MacroAssembler:get_target_addr_pcrel(oc;
}
ICache: ICache:invalidate_rangeloc,MacroAssembler:);
}
ICache:invalidate_range( :);
}else
(, " site ";
=) // Failure should be handled in next_instruction_address().
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
ICache::invalidate_range(loc, MacroAssembler::load_const_from_toc_size());
=loc+MacroAssembler:)
} elseloc 0
assert MacroAssembler:is_load_const_from_tocl)){// Load constant from TOC.
next_address = long offset = MacroAssemblergloc;
} else {
assert(, "a site for set_pcrel_addr";
next_address=)
}
}
void*intptr_t*()=newData;
dress
address loc = addr_at(0);
java.lang.StringIndexOutOfBoundsException: Index 81 out of bounds for length 81
use long}else (:loc) {
address target = MacroAssembler::((NativeMovConstReg*)loc)->dump(64, "NativeMovConstReg( :dataforpc- call"
oldData=*intptr_t);
oldData! ){// Update only if data changes. Prevents cache invalidation.
*(intptr_t *)(target) = newData;
}
// ICache::invalidate_range(target, sizeof(unsigned long)); // No ICache invalidate for CP data.
next_address = loc + MacroAssembler::load_const_from_toc_size();
} elseif (MacroAssembler:assertfalsejava.lang.StringIndexOutOfBoundsException: Range [59, 26) out of bounds for length 66
}elsejava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10 #
:z_SIGSEGV) #}
assert # !:l1)
tty>();
}else
-cr;
=next_instruction_address()
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
}
#ifdef// N a t i v e J u m p //-------------------------------- // N a t i v e M o v R e g M e m //--------------------------------
void NativeMovRegMem::verify() {
addr_at()
(MacroAssembler:is_load_const(l1)) {
tty->cr();
tty->print_cr("NativeMovRegMem::verify(): verifying addr " PTR_FORMAT, p2i(l1));
tty->cr();
((NativeMovRegMem*)l1)->dump(64, "NativeMovConstReg::verify()");
fatal("this is not a `NativeMovRegMem' site");
}
} #endif// COMPILER1
//----------------------- // N a t i v e J u m p //-----------------------
//------------------------------------- // N a t i v e G e n e r a l J u m p //-------------------------------------
#ifndefunsignedlong inst;
voidNativeGeneralJump:verify) long;
Assembler#endif
assert(MacroAssembler::is_branch_pcrelative_long(inst), "java.lang.StringIndexOutOfBoundsException: Range [0, 62) out of bounds for length 0
} #ndif
voidNativeGeneralJump:insert_unconditional(address ,addressentry
uint64_t instr = (*)code_pos=( <16;
Assembler::uimm4(Assembler::java.lang.StringIndexOutOfBoundsException: Range [0, 58) out of bounds for length 55
pcrel_off32entry,,,)
*(uint64_t* ((() &(-1) == 0, "requirement for mt safe patching");
ICache::invalidate_range(code_pos, instruction_size);
}
void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
assert(((intptr_t)instr_addr & (BytesPerWord-1)) == 0, "requirement for mt safe patching"); // Bytes_after_jump cannot change, because we own the Patching_lock.
assert(Patching_lock->owned_by_self(), "must hold lock to patch instruction");
intptr_t bytes_after_jump = (*(intptr_t*)instr_addr) & 0x000000000000ffffL; // 2 bytes after jump.
intptr_t load_const_bytes = (*(intptr_t*)code_buffer) & 0xffffffffffff0000L
*(intptr_t*)instr_addr = // Bytes_after_jump cannot change, because ownPatching_lock.
ICache::invalidate_range(instr_addr, 6);
}
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