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8136473: failed: no mismatched stores, except on raw memory: StoreB StoreI

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Mismatched stores on same slice possible with Unsafe.Put*Unaligned methods

Reviewed-by: kvn, thartmann
This commit is contained in:
Roland Westrelin 2015-10-16 16:53:02 +02:00
parent 0fcb9ffe75
commit 096fa934a8
8 changed files with 288 additions and 92 deletions
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32
hotspot/src/share/vm/opto/graphKit.cpp
View File

@ -1457,7 +1457,11 @@ void GraphKit::set_all_memory_call(Node* call, bool separate_io_proj) {
// factory methods in "int adr_idx"
Node* GraphKit::make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
int adr_idx,
MemNode::MemOrd mo, LoadNode::ControlDependency control_dependency, bool require_atomic_access) {
MemNode::MemOrd mo,
LoadNode::ControlDependency control_dependency,
bool require_atomic_access,
bool unaligned,
bool mismatched) {
assert(adr_idx != Compile::AliasIdxTop, "use other make_load factory" );
const TypePtr* adr_type = NULL; // debug-mode-only argument
debug_only(adr_type = C->get_adr_type(adr_idx));
@ -1470,6 +1474,12 @@ Node* GraphKit::make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
} else {
ld = LoadNode::make(_gvn, ctl, mem, adr, adr_type, t, bt, mo, control_dependency);
}
if (unaligned) {
ld->as_Load()->set_unaligned_access();
}
if (mismatched) {
ld->as_Load()->set_mismatched_access();
}
ld = _gvn.transform(ld);
if ((bt == T_OBJECT) && C->do_escape_analysis() || C->eliminate_boxing()) {
// Improve graph before escape analysis and boxing elimination.
@ -1481,7 +1491,9 @@ Node* GraphKit::make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
Node* GraphKit::store_to_memory(Node* ctl, Node* adr, Node *val, BasicType bt,
int adr_idx,
MemNode::MemOrd mo,
bool require_atomic_access) {
bool require_atomic_access,
bool unaligned,
bool mismatched) {
assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" );
const TypePtr* adr_type = NULL;
debug_only(adr_type = C->get_adr_type(adr_idx));
@ -1494,6 +1506,12 @@ Node* GraphKit::store_to_memory(Node* ctl, Node* adr, Node *val, BasicType bt,
} else {
st = StoreNode::make(_gvn, ctl, mem, adr, adr_type, val, bt, mo);
}
if (unaligned) {
st->as_Store()->set_unaligned_access();
}
if (mismatched) {
st->as_Store()->set_mismatched_access();
}
st = _gvn.transform(st);
set_memory(st, adr_idx);
// Back-to-back stores can only remove intermediate store with DU info
@ -1587,7 +1605,8 @@ Node* GraphKit::store_oop(Node* ctl,
const TypeOopPtr* val_type,
BasicType bt,
bool use_precise,
MemNode::MemOrd mo) {
MemNode::MemOrd mo,
bool mismatched) {
// Transformation of a value which could be NULL pointer (CastPP #NULL)
// could be delayed during Parse (for example, in adjust_map_after_if()).
// Execute transformation here to avoid barrier generation in such case.
@ -1607,7 +1626,7 @@ Node* GraphKit::store_oop(Node* ctl,
NULL /* pre_val */,
bt);
Node* store = store_to_memory(control(), adr, val, bt, adr_idx, mo);
Node* store = store_to_memory(control(), adr, val, bt, adr_idx, mo, mismatched);
post_barrier(control(), store, obj, adr, adr_idx, val, bt, use_precise);
return store;
}
@ -1619,7 +1638,8 @@ Node* GraphKit::store_oop_to_unknown(Node* ctl,
const TypePtr* adr_type,
Node* val,
BasicType bt,
MemNode::MemOrd mo) {
MemNode::MemOrd mo,
bool mismatched) {
Compile::AliasType* at = C->alias_type(adr_type);
const TypeOopPtr* val_type = NULL;
if (adr_type->isa_instptr()) {
@ -1638,7 +1658,7 @@ Node* GraphKit::store_oop_to_unknown(Node* ctl,
if (val_type == NULL) {
val_type = TypeInstPtr::BOTTOM;
}
return store_oop(ctl, obj, adr, adr_type, val, val_type, bt, true, mo);
return store_oop(ctl, obj, adr, adr_type, val, val_type, bt, true, mo, mismatched);
}

32
hotspot/src/share/vm/opto/graphKit.hpp
View File

@ -513,23 +513,28 @@ class GraphKit : public Phase {
// 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 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);
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 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);
mo, control_dependency, require_atomic_access,
unaligned, mismatched);
}
// This is the base version which is given an alias index.
Node* make_load(Node* ctl, Node* adr, const Type* t, BasicType bt, int adr_idx,
MemNode::MemOrd mo, LoadNode::ControlDependency control_dependency = LoadNode::DependsOnlyOnTest,
bool require_atomic_access = false);
bool require_atomic_access = false, bool unaligned = false,
bool mismatched = false);
// Create & transform a StoreNode and store the effect into the
// parser's memory state.
@ -542,19 +547,24 @@ class GraphKit : public Phase {
Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt,
const TypePtr* adr_type,
MemNode::MemOrd mo,
bool require_atomic_access = false) {
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 store_to_memory factory");
return store_to_memory(ctl, adr, val, bt,
C->get_alias_index(adr_type),
mo, require_atomic_access);
mo, require_atomic_access,
unaligned, mismatched);
}
// This is the base version which is given alias index
// Return the new StoreXNode
Node* store_to_memory(Node* ctl, Node* adr, Node* val, BasicType bt,
int adr_idx,
MemNode::MemOrd,
bool require_atomic_access = false);
bool require_atomic_access = false,
bool unaligned = false,
bool mismatched = false);
// All in one pre-barrier, store, post_barrier
@ -577,7 +587,8 @@ class GraphKit : public Phase {
const TypeOopPtr* val_type,
BasicType bt,
bool use_precise,
MemNode::MemOrd mo);
MemNode::MemOrd mo,
bool mismatched = false);
Node* store_oop_to_object(Node* ctl,
Node* obj, // containing obj
@ -608,7 +619,8 @@ class GraphKit : public Phase {
const TypePtr* adr_type,
Node* val,
BasicType bt,
MemNode::MemOrd mo);
MemNode::MemOrd mo,
bool mismatched = false);
// For the few case where the barriers need special help
void pre_barrier(bool do_load, Node* ctl,

6
hotspot/src/share/vm/opto/idealKit.cpp
View File

@ -368,7 +368,8 @@ Node* IdealKit::load(Node* ctl,
Node* IdealKit::store(Node* ctl, Node* adr, Node *val, BasicType bt,
int adr_idx,
MemNode::MemOrd mo, bool require_atomic_access) {
MemNode::MemOrd mo, bool require_atomic_access,
bool mismatched) {
assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory");
const TypePtr* adr_type = NULL;
debug_only(adr_type = C->get_adr_type(adr_idx));
@ -379,6 +380,9 @@ Node* IdealKit::store(Node* ctl, Node* adr, Node *val, BasicType bt,
} else {
st = StoreNode::make(_gvn, ctl, mem, adr, adr_type, val, bt, mo);
}
if (mismatched) {
st->as_Store()->set_mismatched_access();
}
st = transform(st);
set_memory(st, adr_idx);

4
hotspot/src/share/vm/opto/idealKit.hpp
View File

@ -228,7 +228,9 @@ class IdealKit: public StackObj {
BasicType bt,
int adr_idx,
MemNode::MemOrd mo,
bool require_atomic_access = false);
bool require_atomic_access = false,
bool mismatched = false
);
// Store a card mark ordered after store_oop
Node* storeCM(Node* ctl,

153
hotspot/src/share/vm/opto/library_call.cpp
View File

@ -234,7 +234,7 @@ class LibraryCallKit : public GraphKit {
// Generates the guards that check whether the result of
// Unsafe.getObject should be recorded in an SATB log buffer.
void insert_pre_barrier(Node* base_oop, Node* offset, Node* pre_val, bool need_mem_bar);
bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile);
bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile, bool is_unaligned);
static bool klass_needs_init_guard(Node* kls);
bool inline_unsafe_allocate();
bool inline_unsafe_copyMemory();
@ -515,72 +515,72 @@ bool LibraryCallKit::try_to_inline(int predicate) {
case vmIntrinsics::_indexOf: return inline_string_indexOf();
case vmIntrinsics::_equals: return inline_string_equals();
case vmIntrinsics::_getObject: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, !is_volatile);
case vmIntrinsics::_getBoolean: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, !is_volatile);
case vmIntrinsics::_getByte: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, !is_volatile);
case vmIntrinsics::_getShort: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_getChar: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_getInt: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile);
case vmIntrinsics::_getLong: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile);
case vmIntrinsics::_getFloat: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, !is_volatile);
case vmIntrinsics::_getDouble: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, !is_volatile);
case vmIntrinsics::_putObject: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, !is_volatile);
case vmIntrinsics::_putBoolean: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, !is_volatile);
case vmIntrinsics::_putByte: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, !is_volatile);
case vmIntrinsics::_putShort: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_putChar: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_putInt: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile);
case vmIntrinsics::_putLong: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile);
case vmIntrinsics::_putFloat: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, !is_volatile);
case vmIntrinsics::_putDouble: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, !is_volatile);
case vmIntrinsics::_getObject: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, !is_volatile, false);
case vmIntrinsics::_getBoolean: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, !is_volatile, false);
case vmIntrinsics::_getByte: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, !is_volatile, false);
case vmIntrinsics::_getShort: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile, false);
case vmIntrinsics::_getChar: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile, false);
case vmIntrinsics::_getInt: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile, false);
case vmIntrinsics::_getLong: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile, false);
case vmIntrinsics::_getFloat: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, !is_volatile, false);
case vmIntrinsics::_getDouble: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, !is_volatile, false);
case vmIntrinsics::_putObject: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, !is_volatile, false);
case vmIntrinsics::_putBoolean: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, !is_volatile, false);
case vmIntrinsics::_putByte: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, !is_volatile, false);
case vmIntrinsics::_putShort: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile, false);
case vmIntrinsics::_putChar: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile, false);
case vmIntrinsics::_putInt: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile, false);
case vmIntrinsics::_putLong: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile, false);
case vmIntrinsics::_putFloat: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, !is_volatile, false);
case vmIntrinsics::_putDouble: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, !is_volatile, false);
case vmIntrinsics::_getByte_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_BYTE, !is_volatile);
case vmIntrinsics::_getShort_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_getChar_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_getInt_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_INT, !is_volatile);
case vmIntrinsics::_getLong_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_LONG, !is_volatile);
case vmIntrinsics::_getFloat_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_FLOAT, !is_volatile);
case vmIntrinsics::_getDouble_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_DOUBLE, !is_volatile);
case vmIntrinsics::_getAddress_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_ADDRESS, !is_volatile);
case vmIntrinsics::_getByte_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_BYTE, !is_volatile, false);
case vmIntrinsics::_getShort_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_SHORT, !is_volatile, false);
case vmIntrinsics::_getChar_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_CHAR, !is_volatile, false);
case vmIntrinsics::_getInt_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_INT, !is_volatile, false);
case vmIntrinsics::_getLong_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_LONG, !is_volatile, false);
case vmIntrinsics::_getFloat_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_FLOAT, !is_volatile, false);
case vmIntrinsics::_getDouble_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_DOUBLE, !is_volatile, false);
case vmIntrinsics::_getAddress_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_ADDRESS, !is_volatile, false);
case vmIntrinsics::_putByte_raw: return inline_unsafe_access( is_native_ptr, is_store, T_BYTE, !is_volatile);
case vmIntrinsics::_putShort_raw: return inline_unsafe_access( is_native_ptr, is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_putChar_raw: return inline_unsafe_access( is_native_ptr, is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_putInt_raw: return inline_unsafe_access( is_native_ptr, is_store, T_INT, !is_volatile);
case vmIntrinsics::_putLong_raw: return inline_unsafe_access( is_native_ptr, is_store, T_LONG, !is_volatile);
case vmIntrinsics::_putFloat_raw: return inline_unsafe_access( is_native_ptr, is_store, T_FLOAT, !is_volatile);
case vmIntrinsics::_putDouble_raw: return inline_unsafe_access( is_native_ptr, is_store, T_DOUBLE, !is_volatile);
case vmIntrinsics::_putAddress_raw: return inline_unsafe_access( is_native_ptr, is_store, T_ADDRESS, !is_volatile);
case vmIntrinsics::_putByte_raw: return inline_unsafe_access( is_native_ptr, is_store, T_BYTE, !is_volatile, false);
case vmIntrinsics::_putShort_raw: return inline_unsafe_access( is_native_ptr, is_store, T_SHORT, !is_volatile, false);
case vmIntrinsics::_putChar_raw: return inline_unsafe_access( is_native_ptr, is_store, T_CHAR, !is_volatile, false);
case vmIntrinsics::_putInt_raw: return inline_unsafe_access( is_native_ptr, is_store, T_INT, !is_volatile, false);
case vmIntrinsics::_putLong_raw: return inline_unsafe_access( is_native_ptr, is_store, T_LONG, !is_volatile, false);
case vmIntrinsics::_putFloat_raw: return inline_unsafe_access( is_native_ptr, is_store, T_FLOAT, !is_volatile, false);
case vmIntrinsics::_putDouble_raw: return inline_unsafe_access( is_native_ptr, is_store, T_DOUBLE, !is_volatile, false);
case vmIntrinsics::_putAddress_raw: return inline_unsafe_access( is_native_ptr, is_store, T_ADDRESS, !is_volatile, false);
case vmIntrinsics::_getObjectVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, is_volatile);
case vmIntrinsics::_getBooleanVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, is_volatile);
case vmIntrinsics::_getByteVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, is_volatile);
case vmIntrinsics::_getShortVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, is_volatile);
case vmIntrinsics::_getCharVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, is_volatile);
case vmIntrinsics::_getIntVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, is_volatile);
case vmIntrinsics::_getLongVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, is_volatile);
case vmIntrinsics::_getFloatVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, is_volatile);
case vmIntrinsics::_getDoubleVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, is_volatile);
case vmIntrinsics::_getObjectVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, is_volatile, false);
case vmIntrinsics::_getBooleanVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, is_volatile, false);
case vmIntrinsics::_getByteVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, is_volatile, false);
case vmIntrinsics::_getShortVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, is_volatile, false);
case vmIntrinsics::_getCharVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, is_volatile, false);
case vmIntrinsics::_getIntVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, is_volatile, false);
case vmIntrinsics::_getLongVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, is_volatile, false);
case vmIntrinsics::_getFloatVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, is_volatile, false);
case vmIntrinsics::_getDoubleVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, is_volatile, false);
case vmIntrinsics::_putObjectVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, is_volatile);
case vmIntrinsics::_putBooleanVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, is_volatile);
case vmIntrinsics::_putByteVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, is_volatile);
case vmIntrinsics::_putShortVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, is_volatile);
case vmIntrinsics::_putCharVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, is_volatile);
case vmIntrinsics::_putIntVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, is_volatile);
case vmIntrinsics::_putLongVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, is_volatile);
case vmIntrinsics::_putFloatVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, is_volatile);
case vmIntrinsics::_putDoubleVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, is_volatile);
case vmIntrinsics::_putObjectVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, is_volatile, false);
case vmIntrinsics::_putBooleanVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, is_volatile, false);
case vmIntrinsics::_putByteVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, is_volatile, false);
case vmIntrinsics::_putShortVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, is_volatile, false);
case vmIntrinsics::_putCharVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, is_volatile, false);
case vmIntrinsics::_putIntVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, is_volatile, false);
case vmIntrinsics::_putLongVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, is_volatile, false);
case vmIntrinsics::_putFloatVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, is_volatile, false);
case vmIntrinsics::_putDoubleVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, is_volatile, false);
case vmIntrinsics::_getShortUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_getCharUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_getIntUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile);
case vmIntrinsics::_getLongUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile);
case vmIntrinsics::_getShortUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile, true);
case vmIntrinsics::_getCharUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile, true);
case vmIntrinsics::_getIntUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile, true);
case vmIntrinsics::_getLongUnaligned: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile, true);
case vmIntrinsics::_putShortUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile);
case vmIntrinsics::_putCharUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile);
case vmIntrinsics::_putIntUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile);
case vmIntrinsics::_putLongUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile);
case vmIntrinsics::_putShortUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile, true);
case vmIntrinsics::_putCharUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile, true);
case vmIntrinsics::_putIntUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile, true);
case vmIntrinsics::_putLongUnaligned: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile, true);
case vmIntrinsics::_compareAndSwapObject: return inline_unsafe_load_store(T_OBJECT, LS_cmpxchg);
case vmIntrinsics::_compareAndSwapInt: return inline_unsafe_load_store(T_INT, LS_cmpxchg);
@ -2272,7 +2272,7 @@ const TypeOopPtr* LibraryCallKit::sharpen_unsafe_type(Compile::AliasType* alias_
return NULL;
}
bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) {
bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile, bool unaligned) {
if (callee()->is_static()) return false; // caller must have the capability!
#ifndef PRODUCT
@ -2414,7 +2414,24 @@ bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, Bas
// of safe & unsafe memory.
if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder);
if (!is_store) {
assert(is_native_ptr || alias_type->adr_type() == TypeOopPtr::BOTTOM ||
alias_type->field() != NULL || alias_type->element() != NULL, "field, array element or unknown");
bool mismatched = false;
if (alias_type->element() != NULL || alias_type->field() != NULL) {
BasicType bt;
if (alias_type->element() != NULL) {
const Type* element = alias_type->element();
bt = element->isa_narrowoop() ? T_OBJECT : element->array_element_basic_type();
} else {
bt = alias_type->field()->type()->basic_type();
}
if (bt != type) {
mismatched = true;
}
}
assert(type != T_OBJECT || !unaligned, "unaligned access not supported with object type");
if (!is_store) {
Node* p = NULL;
// Try to constant fold a load from a constant field
ciField* field = alias_type->field();
@ -2430,7 +2447,7 @@ bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, Bas
MemNode::MemOrd mo = is_volatile ? MemNode::acquire : MemNode::unordered;
// To be valid, unsafe loads may depend on other conditions than
// the one that guards them: pin the Load node
p = make_load(control(), adr, value_type, type, adr_type, mo, LoadNode::Pinned, is_volatile);
p = make_load(control(), adr, value_type, type, adr_type, mo, LoadNode::Pinned, is_volatile, unaligned, mismatched);
// load value
switch (type) {
case T_BOOLEAN:
@ -2477,12 +2494,12 @@ bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, Bas
MemNode::MemOrd mo = is_volatile ? MemNode::release : MemNode::unordered;
if (type != T_OBJECT ) {
(void) store_to_memory(control(), adr, val, type, adr_type, mo, is_volatile);
(void) store_to_memory(control(), adr, val, type, adr_type, mo, is_volatile, unaligned, mismatched);
} else {
// Possibly an oop being stored to Java heap or native memory
if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) {
// oop to Java heap.
(void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo);
(void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo, mismatched);
} else {
// We can't tell at compile time if we are storing in the Java heap or outside
// of it. So we need to emit code to conditionally do the proper type of
@ -2494,11 +2511,11 @@ bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, Bas
__ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); {
// Sync IdealKit and graphKit.
sync_kit(ideal);
Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo);
Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo, mismatched);
// Update IdealKit memory.
__ sync_kit(this);
} __ else_(); {
__ store(__ ctrl(), adr, val, type, alias_type->index(), mo, is_volatile);
__ store(__ ctrl(), adr, val, type, alias_type->index(), mo, is_volatile, mismatched);
} __ end_if();
// Final sync IdealKit and GraphKit.
final_sync(ideal);

15
hotspot/src/share/vm/opto/memnode.cpp
View File

@ -72,8 +72,15 @@ void MemNode::dump_spec(outputStream *st) const {
dump_adr_type(this, _adr_type, st);
Compile* C = Compile::current();
if( C->alias_type(_adr_type)->is_volatile() )
if (C->alias_type(_adr_type)->is_volatile()) {
st->print(" Volatile!");
}
if (_unaligned_access) {
st->print(" unaligned");
}
if (_mismatched_access) {
st->print(" mismatched");
}
}
void MemNode::dump_adr_type(const Node* mem, const TypePtr* adr_type, outputStream *st) {
@ -2393,7 +2400,8 @@ Node *StoreNode::Ideal(PhaseGVN *phase, bool can_reshape) {
st->Opcode() == Op_StoreVector ||
Opcode() == Op_StoreVector ||
phase->C->get_alias_index(adr_type()) == Compile::AliasIdxRaw ||
(Opcode() == Op_StoreL && st->Opcode() == Op_StoreI), // expanded ClearArrayNode
(Opcode() == Op_StoreL && st->Opcode() == Op_StoreI) || // expanded ClearArrayNode
(is_mismatched_access() || st->as_Store()->is_mismatched_access()),
"no mismatched stores, except on raw memory: %s %s", NodeClassNames[Opcode()], NodeClassNames[st->Opcode()]);
if (st->in(MemNode::Address)->eqv_uncast(address) &&
@ -3213,6 +3221,9 @@ bool InitializeNode::detect_init_independence(Node* n, int& count) {
// within the initialized memory.
intptr_t InitializeNode::can_capture_store(StoreNode* st, PhaseTransform* phase, bool can_reshape) {
const int FAIL = 0;
if (st->is_unaligned_access()) {
return FAIL;
}
if (st->req() != MemNode::ValueIn + 1)
return FAIL; // an inscrutable StoreNode (card mark?)
Node* ctl = st->in(MemNode::Control);

16
hotspot/src/share/vm/opto/memnode.hpp
View File

@ -39,11 +39,14 @@ class PhaseTransform;
//------------------------------MemNode----------------------------------------
// Load or Store, possibly throwing a NULL pointer exception
class MemNode : public Node {
private:
bool _unaligned_access; // Unaligned access from unsafe
bool _mismatched_access; // Mismatched access from unsafe: byte read in integer array for instance
protected:
#ifdef ASSERT
const TypePtr* _adr_type; // What kind of memory is being addressed?
#endif
virtual uint size_of() const; // Size is bigger (ASSERT only)
virtual uint size_of() const;
public:
enum { Control, // When is it safe to do this load?
Memory, // Chunk of memory is being loaded from
@ -57,17 +60,17 @@ public:
} MemOrd;
protected:
MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at )
: Node(c0,c1,c2 ) {
: Node(c0,c1,c2 ), _unaligned_access(false), _mismatched_access(false) {
init_class_id(Class_Mem);
debug_only(_adr_type=at; adr_type();)
}
MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3 )
: Node(c0,c1,c2,c3) {
: Node(c0,c1,c2,c3), _unaligned_access(false), _mismatched_access(false) {
init_class_id(Class_Mem);
debug_only(_adr_type=at; adr_type();)
}
MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3, Node *c4)
: Node(c0,c1,c2,c3,c4) {
: Node(c0,c1,c2,c3,c4), _unaligned_access(false), _mismatched_access(false) {
init_class_id(Class_Mem);
debug_only(_adr_type=at; adr_type();)
}
@ -127,6 +130,11 @@ public:
// the given memory state? (The state may or may not be in(Memory).)
Node* can_see_stored_value(Node* st, PhaseTransform* phase) const;
void set_unaligned_access() { _unaligned_access = true; }
bool is_unaligned_access() const { return _unaligned_access; }
void set_mismatched_access() { _mismatched_access = true; }
bool is_mismatched_access() const { return _mismatched_access; }
#ifndef PRODUCT
static void dump_adr_type(const Node* mem, const TypePtr* adr_type, outputStream *st);
virtual void dump_spec(outputStream *st) const;

122
hotspot/test/compiler/intrinsics/unsafe/TestUnsafeUnalignedMismatchedAccesses.java Normal file
View File

@ -0,0 +1,122 @@
/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/**
* @test
* @bug 8136473
* @summary Mismatched stores on same slice possible with Unsafe.Put*Unaligned methods
* @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation TestUnsafeUnalignedMismatchedAccesses
* @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+UnlockDiagnosticVMOptions -XX:-UseUnalignedAccesses TestUnsafeUnalignedMismatchedAccesses
*
*/
import java.lang.reflect.*;
import sun.misc.Unsafe;
public class TestUnsafeUnalignedMismatchedAccesses {
private static final Unsafe UNSAFE;
static {
try {
Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
unsafeField.setAccessible(true);
UNSAFE = (Unsafe) unsafeField.get(null);
}
catch (Exception e) {
throw new AssertionError(e);
}
}
static void test1(byte[] array) {
array[0] = 0;
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET, 0);
array[0] = 0;
}
static void test2(byte[] array) {
array[0] = 0;
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, 0);
array[0] = 0;
}
static void test3(byte[] array) {
array[0] = 0;
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+2, 0);
array[0] = 0;
}
static void test4(byte[] array) {
array[0] = 0;
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+3, 0);
array[0] = 0;
}
static void test5(byte[] array) {
array[0] = 0;
UNSAFE.putInt(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET, 0);
array[0] = 0;
}
// unaligned access and non escaping allocation
static void test6() {
byte[] array = new byte[10];
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, -1);
array[0] = 0;
}
// unaligned access and non escaping allocation
static int test7() {
byte[] array = new byte[10];
UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, -1);
array[0] = 0;
array[2] = 0;
return array[0] + array[1] + array[2] + array[3] + array[4];
}
// unaligned access with vectorization
static void test8(int[] src1, int[] src2, int[] dst) {
for (int i = 0; i < dst.length-1; i++) {
int res = src1[i] + src2[i];
UNSAFE.putIntUnaligned(dst, UNSAFE.ARRAY_INT_BASE_OFFSET + i*4+1, res);
}
}
static public void main(String[] args) throws Exception {
byte[] byte_array = new byte[100];
int[] int_array = new int[100];
Object[] obj_array = new Object[100];
TestUnsafeUnalignedMismatchedAccesses test = new TestUnsafeUnalignedMismatchedAccesses();
for (int i = 0; i < 20000; i++) {
test1(byte_array);
test2(byte_array);
test3(byte_array);
test4(byte_array);
test5(byte_array);
test6();
test7();
test8(int_array, int_array, int_array);
}
}
}