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This commit is contained in:
Vladimir Kozlov 2013-11-05 17:38:04 -08:00
commit 39b0e57fdd
5098 changed files with 176905 additions and 81175 deletions
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11
hotspot/src/share/vm/interpreter/abstractInterpreter.hpp
View file

@ -30,11 +30,8 @@
#include "runtime/thread.inline.hpp"
#include "runtime/vmThread.hpp"
#include "utilities/top.hpp"
#ifdef TARGET_ARCH_MODEL_x86_32
# include "interp_masm_x86_32.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_x86_64
# include "interp_masm_x86_64.hpp"
#ifdef TARGET_ARCH_x86
# include "interp_masm_x86.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_sparc
# include "interp_masm_sparc.hpp"
@ -164,8 +161,8 @@ class AbstractInterpreter: AllStatic {
// Runtime support
// length = invoke bytecode length (to advance to next bytecode)
static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
static address deopt_entry(TosState state, int length) { ShouldNotReachHere(); return NULL; }
static address return_entry(TosState state, int length, Bytecodes::Code code) { ShouldNotReachHere(); return NULL; }
static address rethrow_exception_entry() { return _rethrow_exception_entry; }

2
hotspot/src/share/vm/interpreter/bytecodeTracer.cpp
View file

@ -215,7 +215,7 @@ void print_oop(oop value, outputStream* st) {
st->print_cr(" %s", buf);
}
} else {
st->print_cr(" " PTR_FORMAT, (intptr_t) value);
st->print_cr(" " PTR_FORMAT, (void *)value);
}
}

2
hotspot/src/share/vm/interpreter/cppInterpreter.hpp
View file

@ -78,7 +78,7 @@ class CppInterpreter: public AbstractInterpreter {
static address stack_result_to_stack(int index) { return _stack_to_stack[index]; }
static address stack_result_to_native(int index) { return _stack_to_native_abi[index]; }
static address return_entry (TosState state, int length);
static address return_entry (TosState state, int length, Bytecodes::Code code);
static address deopt_entry (TosState state, int length);
#ifdef TARGET_ARCH_x86

18
hotspot/src/share/vm/interpreter/interpreter.cpp
View file

@ -329,15 +329,21 @@ void AbstractInterpreter::print_method_kind(MethodKind kind) {
//------------------------------------------------------------------------------------------------------------------------
// Deoptimization support
// If deoptimization happens, this function returns the point of next bytecode to continue execution
/**
* If a deoptimization happens, this function returns the point of next bytecode to continue execution.
*/
address AbstractInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) {
assert(method->contains(bcp), "just checkin'");
Bytecodes::Code code = Bytecodes::java_code_at(method, bcp);
// Get the original and rewritten bytecode.
Bytecodes::Code code = Bytecodes::java_code_at(method, bcp);
assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute");
int bci = method->bci_from(bcp);
int length = -1; // initial value for debugging
const int bci = method->bci_from(bcp);
// compute continuation length
length = Bytecodes::length_at(method, bcp);
const int length = Bytecodes::length_at(method, bcp);
// compute result type
BasicType type = T_ILLEGAL;
@ -393,7 +399,7 @@ address AbstractInterpreter::deopt_continue_after_entry(Method* method, address
return
is_top_frame
? Interpreter::deopt_entry (as_TosState(type), length)
: Interpreter::return_entry(as_TosState(type), length);
: Interpreter::return_entry(as_TosState(type), length, code);
}
// If deoptimization happens, this function returns the point where the interpreter reexecutes

52
hotspot/src/share/vm/interpreter/interpreterRuntime.cpp
View file

@ -523,15 +523,15 @@ IRT_END
IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
// resolve field
FieldAccessInfo info;
fieldDescriptor info;
constantPoolHandle pool(thread, method(thread)->constants());
bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
{
JvmtiHideSingleStepping jhss(thread);
LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
bytecode, false, CHECK);
LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
bytecode, CHECK);
} // end JvmtiHideSingleStepping
// check if link resolution caused cpCache to be updated
@ -551,7 +551,7 @@ IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecode
// class is intitialized. This is required so that access to the static
// field will call the initialization function every time until the class
// is completely initialized ala. in 2.17.5 in JVM Specification.
InstanceKlass *klass = InstanceKlass::cast(info.klass()());
InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
!klass->is_initialized());
Bytecodes::Code get_code = (Bytecodes::Code)0;
@ -566,9 +566,9 @@ IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecode
cache_entry(thread)->set_field(
get_code,
put_code,
info.klass(),
info.field_index(),
info.field_offset(),
info.field_holder(),
info.index(),
info.offset(),
state,
info.access_flags().is_final(),
info.access_flags().is_volatile(),
@ -713,29 +713,55 @@ IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes
if (already_resolved(thread)) return;
if (bytecode == Bytecodes::_invokeinterface) {
if (TraceItables && Verbose) {
ResourceMark rm(thread);
tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
}
}
#ifdef ASSERT
if (bytecode == Bytecodes::_invokeinterface) {
if (info.resolved_method()->method_holder() ==
SystemDictionary::Object_klass()) {
// NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
// (see also cpCacheOop.cpp for details)
// (see also CallInfo::set_interface for details)
assert(info.call_kind() == CallInfo::vtable_call ||
info.call_kind() == CallInfo::direct_call, "");
methodHandle rm = info.resolved_method();
assert(rm->is_final() || info.has_vtable_index(),
"should have been set already");
cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
} else if (!info.resolved_method()->has_itable_index()) {
// Resolved something like CharSequence.toString. Use vtable not itable.
assert(info.call_kind() != CallInfo::itable_call, "");
} else {
// Setup itable entry
int index = klassItable::compute_itable_index(info.resolved_method()());
cache_entry(thread)->set_interface_call(info.resolved_method(), index);
assert(info.call_kind() == CallInfo::itable_call, "");
int index = info.resolved_method()->itable_index();
assert(info.itable_index() == index, "");
}
} else {
cache_entry(thread)->set_method(
assert(info.call_kind() == CallInfo::direct_call ||
info.call_kind() == CallInfo::vtable_call, "");
}
#endif
switch (info.call_kind()) {
case CallInfo::direct_call:
cache_entry(thread)->set_direct_call(
bytecode,
info.resolved_method());
break;
case CallInfo::vtable_call:
cache_entry(thread)->set_vtable_call(
bytecode,
info.resolved_method(),
info.vtable_index());
break;
case CallInfo::itable_call:
cache_entry(thread)->set_itable_call(
bytecode,
info.resolved_method(),
info.itable_index());
break;
default: ShouldNotReachHere();
}
}
IRT_END

568
hotspot/src/share/vm/interpreter/linkResolver.cpp
View file

@ -46,19 +46,6 @@
#include "runtime/thread.inline.hpp"
#include "runtime/vmThread.hpp"
//------------------------------------------------------------------------------------------------------------------------
// Implementation of FieldAccessInfo
void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
BasicType field_type, AccessFlags access_flags) {
_klass = klass;
_name = name;
_field_index = field_index;
_field_offset = field_offset;
_field_type = field_type;
_access_flags = access_flags;
}
//------------------------------------------------------------------------------------------------------------------------
// Implementation of CallInfo
@ -66,26 +53,25 @@ BasicType field_type, AccessFlags access_flags) {
void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
int vtable_index = Method::nonvirtual_vtable_index;
set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
}
void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
// This is only called for interface methods. If the resolved_method
// comes from java/lang/Object, it can be the subject of a virtual call, so
// we should pick the vtable index from the resolved method.
// Other than that case, there is no valid vtable index to specify.
int vtable_index = Method::invalid_vtable_index;
if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
vtable_index = resolved_method->vtable_index();
}
set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
// In that case, the caller must call set_virtual instead of set_interface.
assert(resolved_method->method_holder()->is_interface(), "");
assert(itable_index == resolved_method()->itable_index(), "");
set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
}
void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
}
@ -98,20 +84,29 @@ void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix
resolved_method->is_compiled_lambda_form(),
"linkMethod must return one of these");
int vtable_index = Method::nonvirtual_vtable_index;
assert(resolved_method->vtable_index() == vtable_index, "");
set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
assert(!resolved_method->has_vtable_index(), "");
set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
_resolved_appendix = resolved_appendix;
_resolved_method_type = resolved_method_type;
}
void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
void CallInfo::set_common(KlassHandle resolved_klass,
KlassHandle selected_klass,
methodHandle resolved_method,
methodHandle selected_method,
CallKind kind,
int index,
TRAPS) {
assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
_resolved_klass = resolved_klass;
_selected_klass = selected_klass;
_resolved_method = resolved_method;
_selected_method = selected_method;
_vtable_index = vtable_index;
_call_kind = kind;
_call_index = index;
_resolved_appendix = Handle();
DEBUG_ONLY(verify()); // verify before making side effects
if (CompilationPolicy::must_be_compiled(selected_method)) {
// This path is unusual, mostly used by the '-Xcomp' stress test mode.
@ -138,6 +133,81 @@ void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass
}
}
// utility query for unreflecting a method
CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
Klass* resolved_method_holder = resolved_method->method_holder();
if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
resolved_klass = resolved_method_holder;
}
_resolved_klass = resolved_klass;
_selected_klass = resolved_klass;
_resolved_method = resolved_method;
_selected_method = resolved_method;
// classify:
CallKind kind = CallInfo::unknown_kind;
int index = resolved_method->vtable_index();
if (resolved_method->can_be_statically_bound()) {
kind = CallInfo::direct_call;
} else if (!resolved_method_holder->is_interface()) {
// Could be an Object method inherited into an interface, but still a vtable call.
kind = CallInfo::vtable_call;
} else if (!resolved_klass->is_interface()) {
// A miranda method. Compute the vtable index.
ResourceMark rm;
klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
index = vt->index_of_miranda(resolved_method->name(),
resolved_method->signature());
kind = CallInfo::vtable_call;
} else if (resolved_method->has_vtable_index()) {
// Can occur if an interface redeclares a method of Object.
#ifdef ASSERT
// Ensure that this is really the case.
KlassHandle object_klass = SystemDictionary::Object_klass();
Method * object_resolved_method = object_klass()->vtable()->method_at(index);
assert(object_resolved_method->name() == resolved_method->name(),
err_msg("Object and interface method names should match at vtable index %d, %s != %s",
index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
assert(object_resolved_method->signature() == resolved_method->signature(),
err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
#endif // ASSERT
kind = CallInfo::vtable_call;
} else {
// A regular interface call.
kind = CallInfo::itable_call;
index = resolved_method->itable_index();
}
assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
_call_kind = kind;
_call_index = index;
_resolved_appendix = Handle();
DEBUG_ONLY(verify());
}
#ifdef ASSERT
void CallInfo::verify() {
switch (call_kind()) { // the meaning and allowed value of index depends on kind
case CallInfo::direct_call:
if (_call_index == Method::nonvirtual_vtable_index) break;
// else fall through to check vtable index:
case CallInfo::vtable_call:
assert(resolved_klass()->verify_vtable_index(_call_index), "");
break;
case CallInfo::itable_call:
assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
break;
case CallInfo::unknown_kind:
assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
break;
default:
fatal(err_msg_res("Unexpected call kind %d", call_kind()));
}
}
#endif //ASSERT
//------------------------------------------------------------------------------------------------------------------------
// Klass resolution
@ -163,20 +233,22 @@ void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, i
result = KlassHandle(THREAD, result_oop);
}
void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
Klass* result_oop =
ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK);
result = KlassHandle(THREAD, result_oop);
}
//------------------------------------------------------------------------------------------------------------------------
// Method resolution
//
// According to JVM spec. $5.4.3c & $5.4.3d
// Look up method in klasses, including static methods
// Then look up local default methods
void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
Method* result_oop = klass->uncached_lookup_method(name, signature);
if (result_oop == NULL) {
Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
if (default_methods != NULL) {
result_oop = InstanceKlass::find_method(default_methods, name, signature);
}
}
if (EnableInvokeDynamic && result_oop != NULL) {
vmIntrinsics::ID iid = result_oop->intrinsic_id();
if (MethodHandles::is_signature_polymorphic(iid)) {
@ -188,20 +260,46 @@ void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle kl
}
// returns first instance method
// Looks up method in classes, then looks up local default methods
void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
Method* result_oop = klass->uncached_lookup_method(name, signature);
result = methodHandle(THREAD, result_oop);
while (!result.is_null() && result->is_static()) {
while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
klass = KlassHandle(THREAD, result->method_holder()->super());
result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
}
if (result.is_null()) {
Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
if (default_methods != NULL) {
result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
assert(result.is_null() || !result->is_static(), "static defaults not allowed");
}
}
}
int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
methodHandle resolved_method, TRAPS) {
int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
ResourceMark rm(THREAD);
klassVtable *vt = InstanceKlass::cast(klass())->vtable();
return vt->index_of_miranda(name, signature);
int vtable_index = Method::invalid_vtable_index;
Symbol* name = resolved_method->name();
Symbol* signature = resolved_method->signature();
// First check in default method array
if (!resolved_method->is_abstract() &&
(InstanceKlass::cast(klass())->default_methods() != NULL)) {
int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
if (index >= 0 ) {
vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
}
}
if (vtable_index == Method::invalid_vtable_index) {
// get vtable_index for miranda methods
ResourceMark rm(THREAD);
klassVtable *vt = InstanceKlass::cast(klass())->vtable();
vtable_index = vt->index_of_miranda(name, signature);
}
return vtable_index;
}
void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
@ -320,18 +418,28 @@ void LinkResolver::check_method_accessability(KlassHandle ref_klass,
AccessFlags flags = sel_method->access_flags();
// Special case: arrays always override "clone". JVMS 2.15.
// Special case #1: arrays always override "clone". JVMS 2.15.
// If the resolved klass is an array class, and the declaring class
// is java.lang.Object and the method is "clone", set the flags
// to public.
// Special case #2: If the resolved klass is an interface, and
// the declaring class is java.lang.Object, and the method is
// "clone" or "finalize", set the flags to public. If the
// resolved interface does not contain "clone" or "finalize"
// methods, the method/interface method resolution looks to
// the interface's super class, java.lang.Object. With JDK 8
// interface accessability check requirement, special casing
// this scenario is necessary to avoid an IAE.
//
// We'll check for the method name first, as that's most likely
// to be false (so we'll short-circuit out of these tests).
if (sel_method->name() == vmSymbols::clone_name() &&
sel_klass() == SystemDictionary::Object_klass() &&
resolved_klass->oop_is_array()) {
// We'll check for each method name first and then java.lang.Object
// to best short-circuit out of these tests.
if (((sel_method->name() == vmSymbols::clone_name() &&
(resolved_klass->oop_is_array() || resolved_klass->is_interface())) ||
(sel_method->name() == vmSymbols::finalize_method_name() &&
resolved_klass->is_interface())) &&
sel_klass() == SystemDictionary::Object_klass()) {
// We need to change "protected" to "public".
assert(flags.is_protected(), "clone not protected?");
assert(flags.is_protected(), "clone or finalize not protected?");
jint new_flags = flags.as_int();
new_flags = new_flags & (~JVM_ACC_PROTECTED);
new_flags = new_flags | JVM_ACC_PUBLIC;
@ -360,14 +468,19 @@ void LinkResolver::check_method_accessability(KlassHandle ref_klass,
void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
// This method is used only
// (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
// and
// (2) in Bytecode_invoke::static_target
// It appears to fail when applied to an invokeinterface call site.
// FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
// resolve klass
if (code == Bytecodes::_invokedynamic) {
resolved_klass = SystemDictionary::MethodHandle_klass();
Symbol* method_name = vmSymbols::invoke_name();
Symbol* method_signature = pool->signature_ref_at(index);
KlassHandle current_klass(THREAD, pool->pool_holder());
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
return;
}
@ -389,22 +502,34 @@ void LinkResolver::resolve_method_statically(methodHandle& resolved_method, Klas
if (code == Bytecodes::_invokeinterface) {
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
} else if (code == Bytecodes::_invokevirtual) {
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
} else {
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
}
}
void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
Symbol* method_name, Symbol* method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
KlassHandle current_klass, bool check_access,
bool require_methodref, TRAPS) {
Handle nested_exception;
// 1. lookup method in resolved klass and its super klasses
// 1. check if methodref required, that resolved_klass is not interfacemethodref
if (require_methodref && resolved_klass->is_interface()) {
ResourceMark rm(THREAD);
char buf[200];
jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
resolved_klass()->external_name());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// 2. lookup method in resolved klass and its super klasses
lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) { // not found in the class hierarchy
// 2. lookup method in all the interfaces implemented by the resolved klass
// 3. lookup method in all the interfaces implemented by the resolved klass
lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) {
@ -418,7 +543,7 @@ void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle res
}
if (resolved_method.is_null()) {
// 3. method lookup failed
// 4. method lookup failed
ResourceMark rm(THREAD);
THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
Method::name_and_sig_as_C_string(resolved_klass(),
@ -428,15 +553,6 @@ void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle res
}
}
// 4. check if klass is not interface
if (resolved_klass->is_interface() && resolved_method->is_abstract()) {
ResourceMark rm(THREAD);
char buf[200];
jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
resolved_klass()->external_name());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// 5. check if method is concrete
if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
ResourceMark rm(THREAD);
@ -521,6 +637,16 @@ void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
}
if (check_access) {
// JDK8 adds non-public interface methods, and accessability check requirement
assert(current_klass.not_null() , "current_klass should not be null");
// check if method can be accessed by the referring class
check_method_accessability(current_klass,
resolved_klass,
KlassHandle(THREAD, resolved_method->method_holder()),
resolved_method,
CHECK);
HandleMark hm(THREAD);
Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
@ -552,6 +678,26 @@ void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
}
}
}
if (TraceItables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
resolved_method->method_holder()->internal_name()
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
tty->print("default");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
}
//------------------------------------------------------------------------------------------------------------------------
@ -580,45 +726,49 @@ void LinkResolver::check_field_accessability(KlassHandle ref_klass,
}
}
void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
resolve_field(result, pool, index, byte, check_only, true, CHECK);
void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
// Load these early in case the resolve of the containing klass fails
Symbol* field = pool->name_ref_at(index);
Symbol* sig = pool->signature_ref_at(index);
// resolve specified klass
KlassHandle resolved_klass;
resolve_klass(resolved_klass, pool, index, CHECK);
KlassHandle current_klass(THREAD, pool->pool_holder());
resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
}
void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
TRAPS) {
assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
(byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
// resolve specified klass
KlassHandle resolved_klass;
if (update_pool) {
resolve_klass(resolved_klass, pool, index, CHECK);
} else {
resolve_klass_no_update(resolved_klass, pool, index, CHECK);
}
// Load these early in case the resolve of the containing klass fails
Symbol* field = pool->name_ref_at(index);
Symbol* sig = pool->signature_ref_at(index);
// Check if there's a resolved klass containing the field
if( resolved_klass.is_null() ) {
if (resolved_klass.is_null()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
}
// Resolve instance field
fieldDescriptor fd; // find_field initializes fd if found
KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
// check if field exists; i.e., if a klass containing the field def has been selected
if (sel_klass.is_null()){
if (sel_klass.is_null()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
}
if (!check_access)
// Access checking may be turned off when calling from within the VM.
return;
// check access
KlassHandle ref_klass(THREAD, pool->pool_holder());
check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
// check for errors
if (is_static != fd.is_static()) {
@ -629,7 +779,7 @@ void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle poo
}
// Final fields can only be accessed from its own class.
if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
THROW(vmSymbols::java_lang_IllegalAccessError());
}
@ -639,19 +789,18 @@ void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle poo
//
// note 2: we don't want to force initialization if we are just checking
// if the field access is legal; e.g., during compilation
if (is_static && !check_only) {
if (is_static && initialize_class) {
sel_klass->initialize(CHECK);
}
{
if (sel_klass() != current_klass()) {
HandleMark hm(THREAD);
Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
Symbol* signature_ref = pool->signature_ref_at(index);
{
ResourceMark rm(THREAD);
Symbol* failed_type_symbol =
SystemDictionary::check_signature_loaders(signature_ref,
SystemDictionary::check_signature_loaders(sig,
ref_loader, sel_loader,
false,
CHECK);
@ -677,9 +826,6 @@ void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle poo
// return information. note that the klass is set to the actual klass containing the
// field, otherwise access of static fields in superclasses will not work.
KlassHandle holder (THREAD, fd.field_holder());
Symbol* name = fd.name();
result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
}
@ -716,7 +862,7 @@ void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method,
Symbol* method_name, Symbol* method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
// check if static
@ -743,28 +889,14 @@ void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method
Symbol* method_name, Symbol* method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
if (resolved_klass->is_interface() && current_klass() != NULL) {
// If the target class is a direct interface, treat this as a "super"
// default call.
//
// If the current method is an overpass that happens to call a direct
// super-interface's method, then we'll end up rerunning the default method
// analysis even though we don't need to, but that's ok since it will end
// up with the same answer.
InstanceKlass* ik = InstanceKlass::cast(current_klass());
Array<Klass*>* interfaces = ik->local_interfaces();
int num_interfaces = interfaces->length();
for (int index = 0; index < num_interfaces; index++) {
if (interfaces->at(index) == resolved_klass()) {
Method* method = DefaultMethods::find_super_default(current_klass(),
resolved_klass(), method_name, method_signature, CHECK);
resolved_method = methodHandle(THREAD, method);
return;
}
}
}
// Invokespecial is called for multiple special reasons:
// <init>
// local private method invocation, for classes and interfaces
// superclass.method, which can also resolve to a default method
// and the selected method is recalculated relative to the direct superclass
// superinterface.method, which explicitly does not check shadowing
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
// check if method name is <init>, that it is found in same klass as static type
if (resolved_method->name() == vmSymbols::object_initializer_name() &&
@ -792,6 +924,26 @@ void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
if (TraceItables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
resolved_method->method_holder()->internal_name()
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
tty->print("default");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
}
// throws runtime exceptions
@ -799,23 +951,24 @@ void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle
KlassHandle current_klass, bool check_access, TRAPS) {
// resolved method is selected method unless we have an old-style lookup
// for a superclass method
// Invokespecial for a superinterface, resolved method is selected method,
// no checks for shadowing
methodHandle sel_method(THREAD, resolved_method());
// check if this is an old-style super call and do a new lookup if so
{ KlassHandle method_klass = KlassHandle(THREAD,
resolved_method->method_holder());
const bool direct_calling_default_method =
resolved_klass() != NULL && resolved_method() != NULL &&
resolved_klass->is_interface() && !resolved_method->is_abstract();
if (!direct_calling_default_method &&
check_access &&
if (check_access &&
// a) check if ACC_SUPER flag is set for the current class
(current_klass->is_super() || !AllowNonVirtualCalls) &&
// b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
current_klass->is_subtype_of(method_klass()) &&
current_klass() != method_klass() &&
// b) check if the class of the resolved_klass is a superclass
// (not supertype in order to exclude interface classes) of the current class.
// This check is not performed for super.invoke for interface methods
// in super interfaces.
current_klass->is_subclass_of(resolved_klass()) &&
current_klass() != resolved_klass() &&
// c) check if the method is not <init>
resolved_method->name() != vmSymbols::object_initializer_name()) {
// Lookup super method
@ -853,6 +1006,25 @@ void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle
sel_method->signature()));
}
if (TraceItables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
sel_method->name(),
sel_method->signature()),
sel_method->method_holder()->internal_name()
);
sel_method->access_flags().print_on(tty);
if (sel_method->is_default_method()) {
tty->print("default");
}
if (sel_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
// setup result
result.set_static(resolved_klass, sel_method, CHECK);
}
@ -870,11 +1042,23 @@ void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method
Symbol* method_name, Symbol* method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
// normal method resolution
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
// check if private interface method
if (resolved_klass->is_interface() && resolved_method->is_private()) {
ResourceMark rm(THREAD);
char buf[200];
jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// check if not static
if (resolved_method->is_static()) {
ResourceMark rm(THREAD);
@ -884,6 +1068,26 @@ void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
if (PrintVtables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
resolved_method->method_holder()->internal_name()
);
resolved_method->access_flags().print_on(tty);
if (resolved_method->is_default_method()) {
tty->print("default");
}
if (resolved_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
}
// throws runtime exceptions
@ -906,10 +1110,6 @@ void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
THROW(vmSymbols::java_lang_NullPointerException());
}
// Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
// has not been rewritten, and the vtable initialized.
assert(resolved_method->method_holder()->is_linked(), "must be linked");
// Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
// has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
// a missing receiver might result in a bogus lookup.
@ -917,9 +1117,8 @@ void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
// do lookup based on receiver klass using the vtable index
if (resolved_method->method_holder()->is_interface()) { // miranda method
vtable_index = vtable_index_of_miranda_method(resolved_klass,
resolved_method->name(),
resolved_method->signature(), CHECK);
vtable_index = vtable_index_of_interface_method(resolved_klass,
resolved_method, CHECK);
assert(vtable_index >= 0 , "we should have valid vtable index at this point");
InstanceKlass* inst = InstanceKlass::cast(recv_klass());
@ -927,6 +1126,7 @@ void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
} else {
// at this point we are sure that resolved_method is virtual and not
// a miranda method; therefore, it must have a valid vtable index.
assert(!resolved_method->has_itable_index(), "");
vtable_index = resolved_method->vtable_index();
// We could get a negative vtable_index for final methods,
// because as an optimization they are they are never put in the vtable,
@ -962,6 +1162,26 @@ void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
selected_method->signature()));
}
if (PrintVtables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
(recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
selected_method->method_holder()->internal_name(),
vtable_index
);
selected_method->access_flags().print_on(tty);
if (selected_method->is_default_method()) {
tty->print("default");
}
if (selected_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
// setup result
result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
}
@ -992,6 +1212,17 @@ void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHand
THROW(vmSymbols::java_lang_NullPointerException());
}
// check if private interface method
if (resolved_klass->is_interface() && resolved_method->is_private()) {
ResourceMark rm(THREAD);
char buf[200];
jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// check if receiver klass implements the resolved interface
if (!recv_klass->is_subtype_of(resolved_klass())) {
ResourceMark rm(THREAD);
@ -1006,6 +1237,12 @@ void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHand
lookup_instance_method_in_klasses(sel_method, recv_klass,
resolved_method->name(),
resolved_method->signature(), CHECK);
if (sel_method.is_null() && !check_null_and_abstract) {
// In theory this is a harmless placeholder value, but
// in practice leaving in null affects the nsk default method tests.
// This needs further study.
sel_method = resolved_method;
}
// check if method exists
if (sel_method.is_null()) {
ResourceMark rm(THREAD);
@ -1015,27 +1252,13 @@ void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHand
resolved_method->signature()));
}
// check access
if (sel_method->method_holder()->is_interface()) {
// Method holder is an interface. Throw Illegal Access Error if sel_method
// is neither public nor private.
if (!(sel_method->is_public() || sel_method->is_private())) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
Method::name_and_sig_as_C_string(recv_klass(),
sel_method->name(),
sel_method->signature()));
}
}
else {
// Method holder is a class. Throw Illegal Access Error if sel_method
// is not public.
if (!sel_method->is_public()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
Method::name_and_sig_as_C_string(recv_klass(),
sel_method->name(),
sel_method->signature()));
}
// Throw Illegal Access Error if sel_method is not public.
if (!sel_method->is_public()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
Method::name_and_sig_as_C_string(recv_klass(),
sel_method->name(),
sel_method->signature()));
}
// check if abstract
if (check_null_and_abstract && sel_method->is_abstract()) {
@ -1046,7 +1269,34 @@ void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHand
sel_method->signature()));
}
// setup result
result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
if (!resolved_method->has_itable_index()) {
int vtable_index = resolved_method->vtable_index();
assert(vtable_index == sel_method->vtable_index(), "sanity check");
result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
return;
}
int itable_index = resolved_method()->itable_index();
if (TraceItables && Verbose) {
ResourceMark rm(THREAD);
tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
(recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
Method::name_and_sig_as_C_string(resolved_klass(),
resolved_method->name(),
resolved_method->signature()),
sel_method->method_holder()->internal_name()
);
sel_method->access_flags().print_on(tty);
if (sel_method->is_default_method()) {
tty->print("default");
}
if (sel_method->is_overpass()) {
tty->print("overpass");
}
tty->cr();
}
result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
}
@ -1293,7 +1543,8 @@ void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle po
}
if (TraceMethodHandles) {
tty->print_cr("resolve_invokedynamic #%d %s %s",
ResourceMark rm(THREAD);
tty->print_cr("resolve_invokedynamic #%d %s %s",
ConstantPool::decode_invokedynamic_index(index),
method_name->as_C_string(), method_signature->as_C_string());
tty->print(" BSM info: "); bootstrap_specifier->print();
@ -1320,7 +1571,7 @@ void LinkResolver::resolve_dynamic_call(CallInfo& result,
THREAD);
if (HAS_PENDING_EXCEPTION) {
if (TraceMethodHandles) {
tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
PENDING_EXCEPTION->print();
}
if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
@ -1342,9 +1593,16 @@ void LinkResolver::resolve_dynamic_call(CallInfo& result,
//------------------------------------------------------------------------------------------------------------------------
#ifndef PRODUCT
void FieldAccessInfo::print() {
void CallInfo::print() {
ResourceMark rm;
tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
const char* kindstr = "unknown";
switch (_call_kind) {
case direct_call: kindstr = "direct"; break;
case vtable_call: kindstr = "vtable"; break;
case itable_call: kindstr = "itable"; break;
}
tty->print_cr("Call %s@%d %s", kindstr, _call_index,
_resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
}
#endif

116
hotspot/src/share/vm/interpreter/linkResolver.hpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2013, 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
@ -30,63 +30,54 @@
// All the necessary definitions for run-time link resolution.
// LinkInfo & its subclasses provide all the information gathered
// for a particular link after resolving it. A link is any reference
// CallInfo provides all the information gathered for a particular
// linked call site after resolving it. A link is any reference
// made from within the bytecodes of a method to an object outside of
// that method. If the info is invalid, the link has not been resolved
// successfully.
class LinkInfo VALUE_OBJ_CLASS_SPEC {
};
// Link information for getfield/putfield & getstatic/putstatic bytecodes.
class FieldAccessInfo: public LinkInfo {
protected:
KlassHandle _klass;
Symbol* _name;
AccessFlags _access_flags;
int _field_index; // original index in the klass
int _field_offset;
BasicType _field_type;
class CallInfo VALUE_OBJ_CLASS_SPEC {
public:
void set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
BasicType field_type, AccessFlags access_flags);
KlassHandle klass() const { return _klass; }
Symbol* name() const { return _name; }
int field_index() const { return _field_index; }
int field_offset() const { return _field_offset; }
BasicType field_type() const { return _field_type; }
AccessFlags access_flags() const { return _access_flags; }
// debugging
void print() PRODUCT_RETURN;
};
// Link information for all calls.
class CallInfo: public LinkInfo {
// Ways that a method call might be selected (or not) based on receiver type.
// Note that an invokevirtual instruction might be linked with no_dispatch,
// and an invokeinterface instruction might be linked with any of the three options
enum CallKind {
direct_call, // jump into resolved_method (must be concrete)
vtable_call, // select recv.klass.method_at_vtable(index)
itable_call, // select recv.klass.method_at_itable(resolved_method.holder, index)
unknown_kind = -1
};
private:
KlassHandle _resolved_klass; // static receiver klass
KlassHandle _resolved_klass; // static receiver klass, resolved from a symbolic reference
KlassHandle _selected_klass; // dynamic receiver class (same as static, or subklass)
methodHandle _resolved_method; // static target method
methodHandle _selected_method; // dynamic (actual) target method
int _vtable_index; // vtable index of selected method
CallKind _call_kind; // kind of call (static(=bytecode static/special +
// others inferred), vtable, itable)
int _call_index; // vtable or itable index of selected class method (if any)
Handle _resolved_appendix; // extra argument in constant pool (if CPCE::has_appendix)
Handle _resolved_method_type; // MethodType (for invokedynamic and invokehandle call sites)
void set_static( KlassHandle resolved_klass, methodHandle resolved_method , TRAPS);
void set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method , TRAPS);
void set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index , TRAPS);
void set_virtual( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index , TRAPS);
void set_handle( methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS);
void set_common( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index , TRAPS);
void set_common( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, CallKind kind, int index, TRAPS);
friend class LinkResolver;
public:
CallInfo() {
#ifndef PRODUCT
_call_kind = CallInfo::unknown_kind;
_call_index = Method::garbage_vtable_index;
#endif //PRODUCT
}
// utility to extract an effective CallInfo from a method and an optional receiver limit
// does not queue the method for compilation
CallInfo(Method* resolved_method, Klass* resolved_klass = NULL);
KlassHandle resolved_klass() const { return _resolved_klass; }
KlassHandle selected_klass() const { return _selected_klass; }
methodHandle resolved_method() const { return _resolved_method; }
@ -95,21 +86,43 @@ class CallInfo: public LinkInfo {
Handle resolved_method_type() const { return _resolved_method_type; }
BasicType result_type() const { return selected_method()->result_type(); }
bool has_vtable_index() const { return _vtable_index >= 0; }
bool is_statically_bound() const { return _vtable_index == Method::nonvirtual_vtable_index; }
CallKind call_kind() const { return _call_kind; }
int call_index() const { return _call_index; }
int vtable_index() const {
// Even for interface calls the vtable index could be non-negative.
// See CallInfo::set_interface.
assert(has_vtable_index() || is_statically_bound(), "");
return _vtable_index;
assert(call_kind() == vtable_call || call_kind() == direct_call, "");
// The returned value is < 0 if the call is statically bound.
// But, the returned value may be >= 0 even if the kind is direct_call.
// It is up to the caller to decide which way to go.
return _call_index;
}
int itable_index() const {
assert(call_kind() == itable_call, "");
// The returned value is always >= 0, a valid itable index.
return _call_index;
}
// debugging
#ifdef ASSERT
bool has_vtable_index() const { return _call_index >= 0 && _call_kind != CallInfo::itable_call; }
bool is_statically_bound() const { return _call_index == Method::nonvirtual_vtable_index; }
#endif //ASSERT
void verify() PRODUCT_RETURN;
void print() PRODUCT_RETURN;
};
// Link information for getfield/putfield & getstatic/putstatic bytecodes
// is represented using a fieldDescriptor.
// The LinkResolver is used to resolve constant-pool references at run-time.
// It does all necessary link-time checks & throws exceptions if necessary.
class LinkResolver: AllStatic {
friend class klassVtable;
friend class klassItable;
private:
static void lookup_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
static void lookup_instance_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
@ -117,15 +130,13 @@ class LinkResolver: AllStatic {
static void lookup_polymorphic_method (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature,
KlassHandle current_klass, Handle *appendix_result_or_null, Handle *method_type_result, TRAPS);
static int vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
static int vtable_index_of_interface_method(KlassHandle klass, methodHandle resolved_method, TRAPS);
static void resolve_klass (KlassHandle& result, constantPoolHandle pool, int index, TRAPS);
static void resolve_klass_no_update (KlassHandle& result, constantPoolHandle pool, int index, TRAPS); // no update of constantPool entry
static void resolve_pool (KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS);
static void resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS);
static void resolve_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS);
static void resolve_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool require_methodref, TRAPS);
static void linktime_resolve_static_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS);
static void linktime_resolve_special_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS);
@ -148,9 +159,16 @@ class LinkResolver: AllStatic {
Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS);
// runtime/static resolving for fields
static void resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS);
// takes an extra bool argument "update_pool" to decide whether to update the constantPool during klass resolution.
static void resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS);
static void resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS);
static void resolve_field(fieldDescriptor& result, KlassHandle resolved_klass, Symbol* field_name, Symbol* field_signature,
KlassHandle current_klass, Bytecodes::Code access_kind, bool check_access, bool initialize_class, TRAPS);
// source of access_kind codes:
static Bytecodes::Code field_access_kind(bool is_static, bool is_put) {
return (is_static
? (is_put ? Bytecodes::_putstatic : Bytecodes::_getstatic)
: (is_put ? Bytecodes::_putfield : Bytecodes::_getfield ));
}
// runtime resolving:
// resolved_klass = specified class (i.e., static receiver class)

86
hotspot/src/share/vm/interpreter/templateInterpreter.cpp
View file

@ -184,8 +184,9 @@ EntryPoint TemplateInterpreter::_deopt_entry [TemplateInterpreter::number_of_deo
EntryPoint TemplateInterpreter::_continuation_entry;
EntryPoint TemplateInterpreter::_safept_entry;
address TemplateInterpreter::_return_3_addrs_by_index[TemplateInterpreter::number_of_return_addrs];
address TemplateInterpreter::_return_5_addrs_by_index[TemplateInterpreter::number_of_return_addrs];
address TemplateInterpreter::_invoke_return_entry[TemplateInterpreter::number_of_return_addrs];
address TemplateInterpreter::_invokeinterface_return_entry[TemplateInterpreter::number_of_return_addrs];
address TemplateInterpreter::_invokedynamic_return_entry[TemplateInterpreter::number_of_return_addrs];
DispatchTable TemplateInterpreter::_active_table;
DispatchTable TemplateInterpreter::_normal_table;
@ -237,22 +238,37 @@ void TemplateInterpreterGenerator::generate_all() {
#endif // !PRODUCT
{ CodeletMark cm(_masm, "return entry points");
const int index_size = sizeof(u2);
for (int i = 0; i < Interpreter::number_of_return_entries; i++) {
Interpreter::_return_entry[i] =
EntryPoint(
generate_return_entry_for(itos, i),
generate_return_entry_for(itos, i),
generate_return_entry_for(itos, i),
generate_return_entry_for(atos, i),
generate_return_entry_for(itos, i),
generate_return_entry_for(ltos, i),
generate_return_entry_for(ftos, i),
generate_return_entry_for(dtos, i),
generate_return_entry_for(vtos, i)
generate_return_entry_for(itos, i, index_size),
generate_return_entry_for(itos, i, index_size),
generate_return_entry_for(itos, i, index_size),
generate_return_entry_for(atos, i, index_size),
generate_return_entry_for(itos, i, index_size),
generate_return_entry_for(ltos, i, index_size),
generate_return_entry_for(ftos, i, index_size),
generate_return_entry_for(dtos, i, index_size),
generate_return_entry_for(vtos, i, index_size)
);
}
}
{ CodeletMark cm(_masm, "invoke return entry points");
const TosState states[] = {itos, itos, itos, itos, ltos, ftos, dtos, atos, vtos};
const int invoke_length = Bytecodes::length_for(Bytecodes::_invokestatic);
const int invokeinterface_length = Bytecodes::length_for(Bytecodes::_invokeinterface);
const int invokedynamic_length = Bytecodes::length_for(Bytecodes::_invokedynamic);
for (int i = 0; i < Interpreter::number_of_return_addrs; i++) {
TosState state = states[i];
Interpreter::_invoke_return_entry[i] = generate_return_entry_for(state, invoke_length, sizeof(u2));
Interpreter::_invokeinterface_return_entry[i] = generate_return_entry_for(state, invokeinterface_length, sizeof(u2));
Interpreter::_invokedynamic_return_entry[i] = generate_return_entry_for(state, invokedynamic_length, sizeof(u4));
}
}
{ CodeletMark cm(_masm, "earlyret entry points");
Interpreter::_earlyret_entry =
EntryPoint(
@ -298,13 +314,6 @@ void TemplateInterpreterGenerator::generate_all() {
}
}
for (int j = 0; j < number_of_states; j++) {
const TosState states[] = {btos, ctos, stos, itos, ltos, ftos, dtos, atos, vtos};
int index = Interpreter::TosState_as_index(states[j]);
Interpreter::_return_3_addrs_by_index[index] = Interpreter::return_entry(states[j], 3);
Interpreter::_return_5_addrs_by_index[index] = Interpreter::return_entry(states[j], 5);
}
{ CodeletMark cm(_masm, "continuation entry points");
Interpreter::_continuation_entry =
EntryPoint(
@ -534,9 +543,46 @@ void TemplateInterpreterGenerator::generate_and_dispatch(Template* t, TosState t
//------------------------------------------------------------------------------------------------------------------------
// Entry points
address TemplateInterpreter::return_entry(TosState state, int length) {
/**
* Returns the return entry table for the given invoke bytecode.
*/
address* TemplateInterpreter::invoke_return_entry_table_for(Bytecodes::Code code) {
switch (code) {
case Bytecodes::_invokestatic:
case Bytecodes::_invokespecial:
case Bytecodes::_invokevirtual:
case Bytecodes::_invokehandle:
return Interpreter::invoke_return_entry_table();
case Bytecodes::_invokeinterface:
return Interpreter::invokeinterface_return_entry_table();
case Bytecodes::_invokedynamic:
return Interpreter::invokedynamic_return_entry_table();
default:
fatal(err_msg("invalid bytecode: %s", Bytecodes::name(code)));
return NULL;
}
}
/**
* Returns the return entry address for the given top-of-stack state and bytecode.
*/
address TemplateInterpreter::return_entry(TosState state, int length, Bytecodes::Code code) {
guarantee(0 <= length && length < Interpreter::number_of_return_entries, "illegal length");
return _return_entry[length].entry(state);
const int index = TosState_as_index(state);
switch (code) {
case Bytecodes::_invokestatic:
case Bytecodes::_invokespecial:
case Bytecodes::_invokevirtual:
case Bytecodes::_invokehandle:
return _invoke_return_entry[index];
case Bytecodes::_invokeinterface:
return _invokeinterface_return_entry[index];
case Bytecodes::_invokedynamic:
return _invokedynamic_return_entry[index];
default:
assert(!Bytecodes::is_invoke(code), err_msg("invoke instructions should be handled separately: %s", Bytecodes::name(code)));
return _return_entry[length].entry(state);
}
}

18
hotspot/src/share/vm/interpreter/templateInterpreter.hpp
View file

@ -120,8 +120,9 @@ class TemplateInterpreter: public AbstractInterpreter {
static EntryPoint _continuation_entry;
static EntryPoint _safept_entry;
static address _return_3_addrs_by_index[number_of_return_addrs]; // for invokevirtual return entries
static address _return_5_addrs_by_index[number_of_return_addrs]; // for invokeinterface return entries
static address _invoke_return_entry[number_of_return_addrs]; // for invokestatic, invokespecial, invokevirtual return entries
static address _invokeinterface_return_entry[number_of_return_addrs]; // for invokeinterface return entries
static address _invokedynamic_return_entry[number_of_return_addrs]; // for invokedynamic return entries
static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch)
static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode)
@ -161,12 +162,15 @@ class TemplateInterpreter: public AbstractInterpreter {
static address* normal_table() { return _normal_table.table_for(); }
// Support for invokes
static address* return_3_addrs_by_index_table() { return _return_3_addrs_by_index; }
static address* return_5_addrs_by_index_table() { return _return_5_addrs_by_index; }
static int TosState_as_index(TosState state); // computes index into return_3_entry_by_index table
static address* invoke_return_entry_table() { return _invoke_return_entry; }
static address* invokeinterface_return_entry_table() { return _invokeinterface_return_entry; }
static address* invokedynamic_return_entry_table() { return _invokedynamic_return_entry; }
static int TosState_as_index(TosState state);
static address return_entry (TosState state, int length);
static address deopt_entry (TosState state, int length);
static address* invoke_return_entry_table_for(Bytecodes::Code code);
static address deopt_entry(TosState state, int length);
static address return_entry(TosState state, int length, Bytecodes::Code code);
// Safepoint support
static void notice_safepoints(); // stops the thread when reaching a safepoint

2
hotspot/src/share/vm/interpreter/templateInterpreterGenerator.hpp
View file

@ -53,7 +53,7 @@ class TemplateInterpreterGenerator: public AbstractInterpreterGenerator {
address generate_ClassCastException_handler();
address generate_ArrayIndexOutOfBounds_handler(const char* name);
address generate_continuation_for(TosState state);
address generate_return_entry_for(TosState state, int step);
address generate_return_entry_for(TosState state, int step, size_t index_size);
address generate_earlyret_entry_for(TosState state);
address generate_deopt_entry_for(TosState state, int step);
address generate_safept_entry_for(TosState state, address runtime_entry);

7
hotspot/src/share/vm/interpreter/templateTable.hpp
View file

@ -28,11 +28,8 @@
#include "interpreter/bytecodes.hpp"
#include "memory/allocation.hpp"
#include "runtime/frame.hpp"
#ifdef TARGET_ARCH_MODEL_x86_32
# include "interp_masm_x86_32.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_x86_64
# include "interp_masm_x86_64.hpp"
#ifdef TARGET_ARCH_x86
# include "interp_masm_x86.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_sparc
# include "interp_masm_sparc.hpp"