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#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "jvm.h"
#include "jfr/jfrEvents.hpp"
#include "logging/log.hpp"
+ #include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
+ #include "oops/access.hpp"
+ #include "oops/fieldStreams.inline.hpp"
#include "metaprogramming/primitiveConversions.hpp"
#include "oops/klass.hpp"
#include "oops/method.inline.hpp"
#include "oops/objArrayKlass.hpp"
+ #include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
+ #include "oops/inlineKlass.inline.hpp"
#include "prims/forte.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/jvmtiThreadState.hpp"
#include "prims/methodHandles.hpp"
#include "prims/nativeLookup.hpp"
bc = Bytecodes::_invokestatic;
LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
return receiver;
}
+ // Substitutability test implementation piggy backs on static call resolution
+ Bytecodes::Code code = caller->java_code_at(bci);
+ if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
+ bc = Bytecodes::_invokestatic;
+ methodHandle attached_method(THREAD, extract_attached_method(vfst));
+ assert(attached_method.not_null(), "must have attached method");
+ vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
+ LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
+ #ifdef ASSERT
+ Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(vmSymbols::isSubstitutable_name(), vmSymbols::object_object_boolean_signature());
+ assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
+ #endif
+ return receiver;
+ }
+
Bytecode_invoke bytecode(caller, bci);
int bytecode_index = bytecode.index();
bc = bytecode.invoke_code();
methodHandle attached_method(current, extract_attached_method(vfst));
}
break;
default:
break;
}
+ } else {
+ assert(attached_method->has_scalarized_args(), "invalid use of attached method");
+ if (!attached_method->method_holder()->is_inline_klass()) {
+ // Ignore the attached method in this case to not confuse below code
+ attached_method = methodHandle(current, nullptr);
+ }
}
}
assert(bc != Bytecodes::_illegal, "not initialized");
bool has_receiver = bc != Bytecodes::_invokestatic &&
bc != Bytecodes::_invokedynamic &&
bc != Bytecodes::_invokehandle;
+ bool check_null_and_abstract = true;
// Find receiver for non-static call
if (has_receiver) {
// This register map must be update since we need to find the receiver for
// compiled frames. The receiver might be in a register.
RegisterMap::WalkContinuation::skip);
frame stubFrame = current->last_frame();
// Caller-frame is a compiled frame
frame callerFrame = stubFrame.sender(®_map2);
! if (attached_method.is_null()) {
! Method* callee = bytecode.static_target(CHECK_NH);
if (callee == nullptr) {
THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
}
}
!
! // Retrieve from a compiled argument list
! receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
! assert(oopDesc::is_oop_or_null(receiver()), "");
!
! if (receiver.is_null()) {
! THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
}
}
// Resolve method
if (attached_method.not_null()) {
// Parameterized by attached method.
! LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, CHECK_NH);
} else {
// Parameterized by bytecode.
constantPoolHandle constants(current, caller->constants());
LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
}
#ifdef ASSERT
// Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
! if (has_receiver) {
assert(receiver.not_null(), "should have thrown exception");
Klass* receiver_klass = receiver->klass();
Klass* rk = nullptr;
if (attached_method.not_null()) {
// In case there's resolved method attached, use its holder during the check.
RegisterMap::WalkContinuation::skip);
frame stubFrame = current->last_frame();
// Caller-frame is a compiled frame
frame callerFrame = stubFrame.sender(®_map2);
! Method* callee = attached_method();
! if (callee == nullptr) {
+ callee = bytecode.static_target(CHECK_NH);
if (callee == nullptr) {
THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
}
}
! bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
! if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
! // If the receiver is an inline type that is passed as fields, no oop is available
! // Resolve the call without receiver null checking.
! assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
! assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
! if (bc == Bytecodes::_invokeinterface) {
+ bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
+ }
+ check_null_and_abstract = false;
+ } else {
+ // Retrieve from a compiled argument list
+ receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
+ assert(oopDesc::is_oop_or_null(receiver()), "");
+ if (receiver.is_null()) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
+ }
}
}
// Resolve method
if (attached_method.not_null()) {
// Parameterized by attached method.
! LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
} else {
// Parameterized by bytecode.
constantPoolHandle constants(current, caller->constants());
LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
}
#ifdef ASSERT
// Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
! if (has_receiver && check_null_and_abstract) {
assert(receiver.not_null(), "should have thrown exception");
Klass* receiver_klass = receiver->klass();
Klass* rk = nullptr;
if (attached_method.not_null()) {
// In case there's resolved method attached, use its holder during the check.
#endif
return receiver;
}
! methodHandle SharedRuntime::find_callee_method(TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
// We need first to check if any Java activations (compiled, interpreted)
// exist on the stack since last JavaCall. If not, we need
// to get the target method from the JavaCall wrapper.
#endif
return receiver;
}
! methodHandle SharedRuntime::find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
// We need first to check if any Java activations (compiled, interpreted)
// exist on the stack since last JavaCall. If not, we need
// to get the target method from the JavaCall wrapper.
callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
} else {
Bytecodes::Code bc;
CallInfo callinfo;
find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
callee_method = methodHandle(current, callinfo.selected_method());
}
assert(callee_method()->is_method(), "must be");
return callee_method;
}
// Resolves a call.
! methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
RegisterMap cbl_map(current,
RegisterMap::UpdateMap::skip,
RegisterMap::ProcessFrames::include,
callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
} else {
Bytecodes::Code bc;
CallInfo callinfo;
find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
+ // Calls via mismatching methods are always non-scalarized
+ if (callinfo.resolved_method()->mismatch() && !is_optimized) {
+ caller_is_c1 = true;
+ }
callee_method = methodHandle(current, callinfo.selected_method());
}
assert(callee_method()->is_method(), "must be");
return callee_method;
}
// Resolves a call.
! methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
RegisterMap cbl_map(current,
RegisterMap::UpdateMap::skip,
RegisterMap::ProcessFrames::include,
Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
NoSafepointVerifier nsv;
methodHandle callee_method(current, call_info.selected_method());
+ // Calls via mismatching methods are always non-scalarized
+ if (caller_nm->is_compiled_by_c1() || (call_info.resolved_method()->mismatch() && !is_optimized)) {
+ caller_is_c1 = true;
+ }
assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
(!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
(!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
(!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
(&_resolve_static_ctr);
Atomic::inc(addr);
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("resolving %s%s (%s) call to",
(is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
! Bytecodes::name(invoke_code));
callee_method->print_short_name(tty);
tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
p2i(caller_frame.pc()), p2i(callee_method->code()));
}
#endif
(&_resolve_static_ctr);
Atomic::inc(addr);
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("resolving %s%s (%s) call%s to",
(is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
! Bytecodes::name(invoke_code), (caller_is_c1) ? " from C1" : "");
callee_method->print_short_name(tty);
tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
p2i(caller_frame.pc()), p2i(callee_method->code()));
}
#endif
CompiledICLocker ml(caller_nm);
if (is_virtual && !is_optimized) {
CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
! inline_cache->update(&call_info, receiver->klass());
} else {
// Callsite is a direct call - set it to the destination method
CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
! callsite->set(callee_method);
}
return callee_method;
}
CompiledICLocker ml(caller_nm);
if (is_virtual && !is_optimized) {
CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
! inline_cache->update(&call_info, receiver->klass(), caller_is_c1);
} else {
// Callsite is a direct call - set it to the destination method
CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
! callsite->set(callee_method, caller_is_c1);
}
return callee_method;
}
frame caller_frame = stub_frame.sender(®_map);
assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
#endif /* ASSERT */
methodHandle callee_method;
JRT_BLOCK
! callee_method = SharedRuntime::handle_ic_miss_helper(CHECK_NULL);
// Return Method* through TLS
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method);
JRT_END
// Handle call site that has been made non-entrant
JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
frame caller_frame = stub_frame.sender(®_map);
assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
#endif /* ASSERT */
methodHandle callee_method;
+ bool is_optimized = false;
+ bool caller_is_c1 = false;
JRT_BLOCK
! callee_method = SharedRuntime::handle_ic_miss_helper(is_optimized, caller_is_c1, CHECK_NULL);
// Return Method* through TLS
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method, false, is_optimized, caller_is_c1);
JRT_END
// Handle call site that has been made non-entrant
JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
// JVM upcalls may land here as well, but there's a proper check present in
// LinkResolver::resolve_static_call (called from JavaCalls::call_static),
// so bypassing it in c2i adapter is benign.
return callee->get_c2i_no_clinit_check_entry();
} else {
! return callee->get_c2i_entry();
}
}
// Must be compiled to compiled path which is safe to stackwalk
methodHandle callee_method;
JRT_BLOCK
// Force resolving of caller (if we called from compiled frame)
! callee_method = SharedRuntime::reresolve_call_site(CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method);
JRT_END
// Handle abstract method call
JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
// Verbose error message for AbstractMethodError.
// JVM upcalls may land here as well, but there's a proper check present in
// LinkResolver::resolve_static_call (called from JavaCalls::call_static),
// so bypassing it in c2i adapter is benign.
return callee->get_c2i_no_clinit_check_entry();
} else {
! if (caller_frame.is_interpreted_frame()) {
+ return callee->get_c2i_inline_entry();
+ } else {
+ return callee->get_c2i_entry();
+ }
}
}
// Must be compiled to compiled path which is safe to stackwalk
methodHandle callee_method;
+ bool is_static_call = false;
+ bool is_optimized = false;
+ bool caller_is_c1 = false;
JRT_BLOCK
// Force resolving of caller (if we called from compiled frame)
! callee_method = SharedRuntime::reresolve_call_site(is_static_call, is_optimized, caller_is_c1, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method, is_static_call, is_optimized, caller_is_c1);
JRT_END
// Handle abstract method call
JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
// Verbose error message for AbstractMethodError.
return res;
JRT_END
// return verified_code_entry if interp_only_mode is not set for the current thread;
// otherwise return c2i entry.
! address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method) {
if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
// In interp_only_mode we need to go to the interpreted entry
// The c2i won't patch in this mode -- see fixup_callers_callsite
return callee_method->get_c2i_entry();
}
! assert(callee_method->verified_code_entry() != nullptr, " Jump to zero!");
! return callee_method->verified_code_entry();
}
// resolve a static call and patch code
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
methodHandle callee_method;
bool enter_special = false;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(false, false, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method);
JRT_END
// resolve virtual call and update inline cache to monomorphic
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
methodHandle callee_method;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(true, false, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method);
JRT_END
// Resolve a virtual call that can be statically bound (e.g., always
// monomorphic, so it has no inline cache). Patch code to resolved target.
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
methodHandle callee_method;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(true, true, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method);
JRT_END
! methodHandle SharedRuntime::handle_ic_miss_helper(TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
CallInfo call_info;
Bytecodes::Code bc;
return res;
JRT_END
// return verified_code_entry if interp_only_mode is not set for the current thread;
// otherwise return c2i entry.
! address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
+ bool is_static_call, bool is_optimized, bool caller_is_c1) {
if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
// In interp_only_mode we need to go to the interpreted entry
// The c2i won't patch in this mode -- see fixup_callers_callsite
return callee_method->get_c2i_entry();
}
!
! if (caller_is_c1) {
+ assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
+ return callee_method->verified_inline_code_entry();
+ } else if (is_static_call || is_optimized) {
+ assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
+ return callee_method->verified_code_entry();
+ } else {
+ assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
+ return callee_method->verified_inline_ro_code_entry();
+ }
}
// resolve a static call and patch code
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
methodHandle callee_method;
+ bool caller_is_c1 = false;
bool enter_special = false;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(false, false, caller_is_c1, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method, true, false, caller_is_c1);
JRT_END
// resolve virtual call and update inline cache to monomorphic
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
methodHandle callee_method;
+ bool caller_is_c1 = false;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(true, false, caller_is_c1, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method, false, false, caller_is_c1);
JRT_END
// Resolve a virtual call that can be statically bound (e.g., always
// monomorphic, so it has no inline cache). Patch code to resolved target.
JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
methodHandle callee_method;
+ bool caller_is_c1 = false;
JRT_BLOCK
! callee_method = SharedRuntime::resolve_helper(true, true, caller_is_c1, CHECK_NULL);
current->set_vm_result_2(callee_method());
JRT_BLOCK_END
// return compiled code entry point after potential safepoints
! return get_resolved_entry(current, callee_method, false, true, caller_is_c1);
JRT_END
!
+
+ methodHandle SharedRuntime::handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
CallInfo call_info;
Bytecodes::Code bc;
Atomic::inc(&_ic_miss_ctr);
// Statistics & Tracing
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("IC miss (%s) call to", Bytecodes::name(bc));
callee_method->print_short_name(tty);
tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
}
if (ICMissHistogram) {
Atomic::inc(&_ic_miss_ctr);
// Statistics & Tracing
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("IC miss (%s) call%s to", Bytecodes::name(bc), (caller_is_c1) ? " from C1" : "");
callee_method->print_short_name(tty);
tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
}
if (ICMissHistogram) {
RegisterMap::ProcessFrames::include,
RegisterMap::WalkContinuation::skip);
frame caller_frame = current->last_frame().sender(®_map);
CodeBlob* cb = caller_frame.cb();
nmethod* caller_nm = cb->as_nmethod();
CompiledICLocker ml(caller_nm);
CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
! inline_cache->update(&call_info, receiver()->klass());
return callee_method;
}
//
// Resets a call-site in compiled code so it will get resolved again.
// This routines handles both virtual call sites, optimized virtual call
// sites, and static call sites. Typically used to change a call sites
// destination from compiled to interpreted.
//
! methodHandle SharedRuntime::reresolve_call_site(TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
RegisterMap reg_map(current,
RegisterMap::UpdateMap::skip,
RegisterMap::ProcessFrames::include,
RegisterMap::WalkContinuation::skip);
frame stub_frame = current->last_frame();
assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
frame caller = stub_frame.sender(®_map);
// Do nothing if the frame isn't a live compiled frame.
// nmethod could be deoptimized by the time we get here
// so no update to the caller is needed.
RegisterMap::ProcessFrames::include,
RegisterMap::WalkContinuation::skip);
frame caller_frame = current->last_frame().sender(®_map);
CodeBlob* cb = caller_frame.cb();
nmethod* caller_nm = cb->as_nmethod();
+ // Calls via mismatching methods are always non-scalarized
+ if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
+ caller_is_c1 = true;
+ }
CompiledICLocker ml(caller_nm);
CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
! inline_cache->update(&call_info, receiver()->klass(), caller_is_c1);
return callee_method;
}
//
// Resets a call-site in compiled code so it will get resolved again.
// This routines handles both virtual call sites, optimized virtual call
// sites, and static call sites. Typically used to change a call sites
// destination from compiled to interpreted.
//
! methodHandle SharedRuntime::reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS) {
JavaThread* current = THREAD;
ResourceMark rm(current);
RegisterMap reg_map(current,
RegisterMap::UpdateMap::skip,
RegisterMap::ProcessFrames::include,
RegisterMap::WalkContinuation::skip);
frame stub_frame = current->last_frame();
assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
frame caller = stub_frame.sender(®_map);
+ if (caller.is_compiled_frame()) {
+ caller_is_c1 = caller.cb()->as_nmethod()->is_compiled_by_c1();
+ }
// Do nothing if the frame isn't a live compiled frame.
// nmethod could be deoptimized by the time we get here
// so no update to the caller is needed.
// On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
// bytes back in the instruction stream so we must also check for reloc info.
RelocIterator iter(caller_nm, call_addr, call_addr+1);
bool ret = iter.next(); // Get item
if (ret) {
switch (iter.type()) {
case relocInfo::static_call_type:
case relocInfo::opt_virtual_call_type: {
CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
cdc->set_to_clean();
break;
}
-
case relocInfo::virtual_call_type: {
// compiled, dispatched call (which used to call an interpreted method)
CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
inline_cache->set_to_clean();
break;
// On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
// bytes back in the instruction stream so we must also check for reloc info.
RelocIterator iter(caller_nm, call_addr, call_addr+1);
bool ret = iter.next(); // Get item
if (ret) {
+ is_static_call = false;
+ is_optimized = false;
switch (iter.type()) {
case relocInfo::static_call_type:
+ is_static_call = true;
case relocInfo::opt_virtual_call_type: {
+ is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
cdc->set_to_clean();
break;
}
case relocInfo::virtual_call_type: {
// compiled, dispatched call (which used to call an interpreted method)
CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
inline_cache->set_to_clean();
break;
}
}
}
}
! methodHandle callee_method = find_callee_method(CHECK_(methodHandle()));
-
#ifndef PRODUCT
Atomic::inc(&_wrong_method_ctr);
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("handle_wrong_method reresolving call to");
callee_method->print_short_name(tty);
tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
}
#endif
}
}
}
}
! methodHandle callee_method = find_callee_method(is_optimized, caller_is_c1, CHECK_(methodHandle()));
#ifndef PRODUCT
Atomic::inc(&_wrong_method_ctr);
if (TraceCallFixup) {
ResourceMark rm(current);
! tty->print("handle_wrong_method reresolving call%s to", (caller_is_c1) ? " from C1" : "");
callee_method->print_short_name(tty);
tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
}
#endif
);
}
return message;
}
+ char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
+ assert(klass->is_inline_klass(), "Must be a concrete value class");
+ const char* desc = "Cannot synchronize on an instance of value class ";
+ const char* className = klass->external_name();
+ size_t msglen = strlen(desc) + strlen(className) + 1;
+ char* message = NEW_RESOURCE_ARRAY(char, msglen);
+ if (nullptr == message) {
+ // Out of memory: can't create detailed error message
+ message = const_cast<char*>(klass->external_name());
+ } else {
+ jio_snprintf(message, msglen, "%s%s", desc, className);
+ }
+ return message;
+ }
+
JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
(void) JavaThread::current()->stack_overflow_state()->reguard_stack();
JRT_END
void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
// A simple wrapper class around the calling convention information
// that allows sharing of adapters for the same calling convention.
class AdapterFingerPrint : public CHeapObj<mtCode> {
private:
enum {
! _basic_type_bits = 4,
_basic_type_mask = right_n_bits(_basic_type_bits),
_basic_types_per_int = BitsPerInt / _basic_type_bits,
_compact_int_count = 3
};
// TO DO: Consider integrating this with a more global scheme for compressing signatures.
// A simple wrapper class around the calling convention information
// that allows sharing of adapters for the same calling convention.
class AdapterFingerPrint : public CHeapObj<mtCode> {
private:
enum {
! _basic_type_bits = 5,
_basic_type_mask = right_n_bits(_basic_type_bits),
_basic_types_per_int = BitsPerInt / _basic_type_bits,
_compact_int_count = 3
};
// TO DO: Consider integrating this with a more global scheme for compressing signatures.
// Otherwise _value._fingerprint is the array.
// Remap BasicTypes that are handled equivalently by the adapters.
// These are correct for the current system but someday it might be
// necessary to make this mapping platform dependent.
! static int adapter_encoding(BasicType in) {
switch (in) {
case T_BOOLEAN:
case T_BYTE:
case T_SHORT:
case T_CHAR:
! // There are all promoted to T_INT in the calling convention
return T_INT;
case T_OBJECT:
case T_ARRAY:
// In other words, we assume that any register good enough for
// Otherwise _value._fingerprint is the array.
// Remap BasicTypes that are handled equivalently by the adapters.
// These are correct for the current system but someday it might be
// necessary to make this mapping platform dependent.
! static BasicType adapter_encoding(BasicType in) {
switch (in) {
case T_BOOLEAN:
case T_BYTE:
case T_SHORT:
case T_CHAR:
! // They are all promoted to T_INT in the calling convention
return T_INT;
case T_OBJECT:
case T_ARRAY:
// In other words, we assume that any register good enough for
return T_CONFLICT;
}
}
public:
! AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) {
// The fingerprint is based on the BasicType signature encoded
// into an array of ints with eight entries per int.
int* ptr;
int len = (total_args_passed + (_basic_types_per_int-1)) / _basic_types_per_int;
if (len <= _compact_int_count) {
assert(_compact_int_count == 3, "else change next line");
_value._compact[0] = _value._compact[1] = _value._compact[2] = 0;
return T_CONFLICT;
}
}
public:
! AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
// The fingerprint is based on the BasicType signature encoded
// into an array of ints with eight entries per int.
+ int total_args_passed = (sig != nullptr) ? sig->length() : 0;
int* ptr;
int len = (total_args_passed + (_basic_types_per_int-1)) / _basic_types_per_int;
if (len <= _compact_int_count) {
assert(_compact_int_count == 3, "else change next line");
_value._compact[0] = _value._compact[1] = _value._compact[2] = 0;
ptr = _value._fingerprint;
}
// Now pack the BasicTypes with 8 per int
int sig_index = 0;
for (int index = 0; index < len; index++) {
int value = 0;
! for (int byte = 0; sig_index < total_args_passed && byte < _basic_types_per_int; byte++) {
! int bt = adapter_encoding(sig_bt[sig_index++]);
! assert((bt & _basic_type_mask) == bt, "must fit in 4 bits");
! value = (value << _basic_type_bits) | bt;
}
ptr[index] = value;
}
}
~AdapterFingerPrint() {
if (_length > 0) {
FREE_C_HEAP_ARRAY(int, _value._fingerprint);
ptr = _value._fingerprint;
}
// Now pack the BasicTypes with 8 per int
int sig_index = 0;
+ BasicType prev_bt = T_ILLEGAL;
+ int vt_count = 0;
for (int index = 0; index < len; index++) {
int value = 0;
! for (int byte = 0; byte < _basic_types_per_int; byte++) {
! BasicType bt = T_ILLEGAL;
! if (sig_index < total_args_passed) {
! bt = sig->at(sig_index++)._bt;
+ if (bt == T_METADATA) {
+ // Found start of inline type in signature
+ assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
+ if (sig_index == 1 && has_ro_adapter) {
+ // With a ro_adapter, replace receiver inline type delimiter by T_VOID to prevent matching
+ // with other adapters that have the same inline type as first argument and no receiver.
+ bt = T_VOID;
+ }
+ vt_count++;
+ } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
+ // Found end of inline type in signature
+ assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
+ vt_count--;
+ assert(vt_count >= 0, "invalid vt_count");
+ } else if (vt_count == 0) {
+ // Widen fields that are not part of a scalarized inline type argument
+ bt = adapter_encoding(bt);
+ }
+ prev_bt = bt;
+ }
+ int bt_val = (bt == T_ILLEGAL) ? 0 : bt;
+ assert((bt_val & _basic_type_mask) == bt_val, "must fit in 4 bits");
+ value = (value << _basic_type_bits) | bt_val;
}
ptr[index] = value;
}
+ assert(vt_count == 0, "invalid vt_count");
}
~AdapterFingerPrint() {
if (_length > 0) {
FREE_C_HEAP_ARRAY(int, _value._fingerprint);
if (v == T_VOID) {
st.print("J");
} else {
st.print("L");
}
! }
! switch (v) {
! case T_INT: st.print("I"); break;
! case T_LONG: long_prev = true; break;
- case T_FLOAT: st.print("F"); break;
- case T_DOUBLE: st.print("D"); break;
- case T_VOID: break;
- default: ShouldNotReachHere();
}
}
}
if (long_prev) {
st.print("L");
if (v == T_VOID) {
st.print("J");
} else {
st.print("L");
}
! } else if (v == T_LONG) {
! long_prev = true;
! } else if (v != T_VOID){
! st.print("%c", type2char((BasicType)v));
}
}
}
if (long_prev) {
st.print("L");
AdapterFingerPrint::compute_hash,
AdapterFingerPrint::equals>;
static AdapterHandlerTable* _adapter_handler_table;
// Find a entry with the same fingerprint if it exists
! static AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) {
NOT_PRODUCT(_lookups++);
assert_lock_strong(AdapterHandlerLibrary_lock);
! AdapterFingerPrint fp(total_args_passed, sig_bt);
AdapterHandlerEntry** entry = _adapter_handler_table->get(&fp);
if (entry != nullptr) {
#ifndef PRODUCT
if (fp.is_compact()) _compact++;
_hits++;
AdapterFingerPrint::compute_hash,
AdapterFingerPrint::equals>;
static AdapterHandlerTable* _adapter_handler_table;
// Find a entry with the same fingerprint if it exists
! static AdapterHandlerEntry* lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
NOT_PRODUCT(_lookups++);
assert_lock_strong(AdapterHandlerLibrary_lock);
! AdapterFingerPrint fp(sig, has_ro_adapter);
AdapterHandlerEntry** entry = _adapter_handler_table->get(&fp);
if (entry != nullptr) {
#ifndef PRODUCT
if (fp.is_compact()) _compact++;
_hits++;
AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
! const int AdapterHandlerLibrary_size = 16*K;
BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
BufferBlob* AdapterHandlerLibrary::buffer_blob() {
return _buffer;
}
AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
! const int AdapterHandlerLibrary_size = 48*K;
BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
BufferBlob* AdapterHandlerLibrary::buffer_blob() {
return _buffer;
}
// are never compiled so an i2c entry is somewhat meaningless, but
// throw AbstractMethodError just in case.
// Pass wrong_method_abstract for the c2i transitions to return
// AbstractMethodError for invalid invocations.
address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub();
! _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, nullptr),
SharedRuntime::throw_AbstractMethodError_entry(),
wrong_method_abstract, wrong_method_abstract);
-
_buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
- _no_arg_handler = create_adapter(no_arg_blob, 0, nullptr, true);
! BasicType obj_args[] = { T_OBJECT };
! _obj_arg_handler = create_adapter(obj_arg_blob, 1, obj_args, true);
! BasicType int_args[] = { T_INT };
! _int_arg_handler = create_adapter(int_arg_blob, 1, int_args, true);
! BasicType obj_int_args[] = { T_OBJECT, T_INT };
! _obj_int_arg_handler = create_adapter(obj_int_arg_blob, 2, obj_int_args, true);
! BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
! _obj_obj_arg_handler = create_adapter(obj_obj_arg_blob, 2, obj_obj_args, true);
assert(no_arg_blob != nullptr &&
obj_arg_blob != nullptr &&
int_arg_blob != nullptr &&
obj_int_arg_blob != nullptr &&
obj_obj_arg_blob != nullptr, "Initial adapters must be properly created");
}
// Outside of the lock
post_adapter_creation(no_arg_blob, _no_arg_handler);
post_adapter_creation(obj_arg_blob, _obj_arg_handler);
post_adapter_creation(int_arg_blob, _int_arg_handler);
// are never compiled so an i2c entry is somewhat meaningless, but
// throw AbstractMethodError just in case.
// Pass wrong_method_abstract for the c2i transitions to return
// AbstractMethodError for invalid invocations.
address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub();
! _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(nullptr),
SharedRuntime::throw_AbstractMethodError_entry(),
+ wrong_method_abstract, wrong_method_abstract, wrong_method_abstract,
wrong_method_abstract, wrong_method_abstract);
_buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
! CompiledEntrySignature no_args;
! no_args.compute_calling_conventions();
+ _no_arg_handler = create_adapter(no_arg_blob, no_args, true);
+
+ CompiledEntrySignature obj_args;
+ SigEntry::add_entry(obj_args.sig(), T_OBJECT, nullptr);
+ obj_args.compute_calling_conventions();
+ _obj_arg_handler = create_adapter(obj_arg_blob, obj_args, true);
! CompiledEntrySignature int_args;
! SigEntry::add_entry(int_args.sig(), T_INT, nullptr);
+ int_args.compute_calling_conventions();
+ _int_arg_handler = create_adapter(int_arg_blob, int_args, true);
! CompiledEntrySignature obj_int_args;
! SigEntry::add_entry(obj_int_args.sig(), T_OBJECT, nullptr);
+ SigEntry::add_entry(obj_int_args.sig(), T_INT, nullptr);
+ obj_int_args.compute_calling_conventions();
+ _obj_int_arg_handler = create_adapter(obj_int_arg_blob, obj_int_args, true);
! CompiledEntrySignature obj_obj_args;
! SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT, nullptr);
+ SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT, nullptr);
+ obj_obj_args.compute_calling_conventions();
+ _obj_obj_arg_handler = create_adapter(obj_obj_arg_blob, obj_obj_args, true);
assert(no_arg_blob != nullptr &&
obj_arg_blob != nullptr &&
int_arg_blob != nullptr &&
obj_int_arg_blob != nullptr &&
obj_obj_arg_blob != nullptr, "Initial adapters must be properly created");
}
+ return;
// Outside of the lock
post_adapter_creation(no_arg_blob, _no_arg_handler);
post_adapter_creation(obj_arg_blob, _obj_arg_handler);
post_adapter_creation(int_arg_blob, _int_arg_handler);
}
AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint,
address i2c_entry,
address c2i_entry,
address c2i_unverified_entry,
address c2i_no_clinit_check_entry) {
! // Insert an entry into the table
! return new AdapterHandlerEntry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry,
- c2i_no_clinit_check_entry);
}
AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
if (method->is_abstract()) {
! return _abstract_method_handler;
}
int total_args_passed = method->size_of_parameters(); // All args on stack
if (total_args_passed == 0) {
return _no_arg_handler;
} else if (total_args_passed == 1) {
if (!method->is_static()) {
return _obj_arg_handler;
}
switch (method->signature()->char_at(1)) {
! case JVM_SIGNATURE_CLASS:
case JVM_SIGNATURE_ARRAY:
return _obj_arg_handler;
case JVM_SIGNATURE_INT:
case JVM_SIGNATURE_BOOLEAN:
case JVM_SIGNATURE_CHAR:
case JVM_SIGNATURE_BYTE:
case JVM_SIGNATURE_SHORT:
return _int_arg_handler;
}
} else if (total_args_passed == 2 &&
! !method->is_static()) {
switch (method->signature()->char_at(1)) {
! case JVM_SIGNATURE_CLASS:
case JVM_SIGNATURE_ARRAY:
return _obj_obj_arg_handler;
case JVM_SIGNATURE_INT:
case JVM_SIGNATURE_BOOLEAN:
case JVM_SIGNATURE_CHAR:
}
AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint,
address i2c_entry,
address c2i_entry,
+ address c2i_inline_entry,
+ address c2i_inline_ro_entry,
address c2i_unverified_entry,
+ address c2i_unverified_inline_entry,
address c2i_no_clinit_check_entry) {
! return new AdapterHandlerEntry(fingerprint, i2c_entry, c2i_entry, c2i_inline_entry, c2i_inline_ro_entry, c2i_unverified_entry,
! c2i_unverified_inline_entry, c2i_no_clinit_check_entry);
}
AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
if (method->is_abstract()) {
! return nullptr;
}
int total_args_passed = method->size_of_parameters(); // All args on stack
if (total_args_passed == 0) {
return _no_arg_handler;
} else if (total_args_passed == 1) {
if (!method->is_static()) {
+ if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
+ return nullptr;
+ }
return _obj_arg_handler;
}
switch (method->signature()->char_at(1)) {
! case JVM_SIGNATURE_CLASS: {
+ if (InlineTypePassFieldsAsArgs) {
+ SignatureStream ss(method->signature());
+ InlineKlass* vk = ss.as_inline_klass(method->method_holder());
+ if (vk != nullptr) {
+ return nullptr;
+ }
+ }
+ return _obj_arg_handler;
+ }
case JVM_SIGNATURE_ARRAY:
return _obj_arg_handler;
case JVM_SIGNATURE_INT:
case JVM_SIGNATURE_BOOLEAN:
case JVM_SIGNATURE_CHAR:
case JVM_SIGNATURE_BYTE:
case JVM_SIGNATURE_SHORT:
return _int_arg_handler;
}
} else if (total_args_passed == 2 &&
! !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
switch (method->signature()->char_at(1)) {
! case JVM_SIGNATURE_CLASS: {
+ if (InlineTypePassFieldsAsArgs) {
+ SignatureStream ss(method->signature());
+ InlineKlass* vk = ss.as_inline_klass(method->method_holder());
+ if (vk != nullptr) {
+ return nullptr;
+ }
+ }
+ return _obj_obj_arg_handler;
+ }
case JVM_SIGNATURE_ARRAY:
return _obj_obj_arg_handler;
case JVM_SIGNATURE_INT:
case JVM_SIGNATURE_BOOLEAN:
case JVM_SIGNATURE_CHAR:
}
}
return nullptr;
}
! class AdapterSignatureIterator : public SignatureIterator {
! private:
! BasicType stack_sig_bt[16];
! BasicType* sig_bt;
! int index;
! public:
! AdapterSignatureIterator(Symbol* signature,
! fingerprint_t fingerprint,
! bool is_static,
! int total_args_passed) :
! SignatureIterator(signature, fingerprint),
! index(0)
! {
! sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
! if (!is_static) { // Pass in receiver first
! sig_bt[index++] = T_OBJECT;
}
- do_parameters_on(this);
}
! BasicType* basic_types() {
! return sig_bt;
}
! #ifdef ASSERT
! int slots() {
! return index;
}
#endif
! private:
! friend class SignatureIterator; // so do_parameters_on can call do_type
! void do_type(BasicType type) {
! sig_bt[index++] = type;
! if (type == T_LONG || type == T_DOUBLE) {
! sig_bt[index++] = T_VOID; // Longs & doubles take 2 Java slots
}
}
! };
AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
// Use customized signature handler. Need to lock around updates to
// the _adapter_handler_table (it is not safe for concurrent readers
// and a single writer: this could be fixed if it becomes a
}
}
return nullptr;
}
! CompiledEntrySignature::CompiledEntrySignature(Method* method) :
! _method(method), _num_inline_args(0), _has_inline_recv(false),
! _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
! _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
! _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
+ _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
+ _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
+ _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
+ }
! // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
! // or the same entry for VEP and VIEP(RO).
! CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
! if (!has_scalarized_args()) {
! // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
! return CodeOffsets::Verified_Entry;
! }
! if (_method->is_static()) {
! // Static methods don't need VIEP(RO)
! return CodeOffsets::Verified_Entry;
! }
+
+ if (has_inline_recv()) {
+ if (num_inline_args() == 1) {
+ // Share same entry for VIEP and VIEP(RO).
+ // This is quite common: we have an instance method in an InlineKlass that has
+ // no inline type args other than <this>.
+ return CodeOffsets::Verified_Inline_Entry;
+ } else {
+ assert(num_inline_args() > 1, "must be");
+ // No sharing:
+ // VIEP(RO) -- <this> is passed as object
+ // VEP -- <this> is passed as fields
+ return CodeOffsets::Verified_Inline_Entry_RO;
}
}
! // Either a static method, or <this> is not an inline type
! if (args_on_stack_cc() != args_on_stack_cc_ro()) {
+ // No sharing:
+ // Some arguments are passed on the stack, and we have inserted reserved entries
+ // into the VEP, but we never insert reserved entries into the VIEP(RO).
+ return CodeOffsets::Verified_Inline_Entry_RO;
+ } else {
+ // Share same entry for VEP and VIEP(RO).
+ return CodeOffsets::Verified_Entry;
}
+ }
! // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
! GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
! if (_supers != nullptr) {
+ return _supers;
+ }
+ _supers = new GrowableArray<Method*>();
+ // Skip private, static, and <init> methods
+ if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
+ return _supers;
+ }
+ Symbol* name = _method->name();
+ Symbol* signature = _method->signature();
+ const Klass* holder = _method->method_holder()->super();
+ Symbol* holder_name = holder->name();
+ ThreadInVMfromUnknown tiv;
+ JavaThread* current = JavaThread::current();
+ HandleMark hm(current);
+ Handle loader(current, _method->method_holder()->class_loader());
+
+ // Walk up the class hierarchy and search for super methods
+ while (holder != nullptr) {
+ Method* super_method = holder->lookup_method(name, signature);
+ if (super_method == nullptr) {
+ break;
+ }
+ if (!super_method->is_static() && !super_method->is_private() &&
+ (!super_method->is_package_private() ||
+ super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
+ _supers->push(super_method);
+ }
+ holder = super_method->method_holder()->super();
+ }
+ // Search interfaces for super methods
+ Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
+ for (int i = 0; i < interfaces->length(); ++i) {
+ Method* m = interfaces->at(i)->lookup_method(name, signature);
+ if (m != nullptr && !m->is_static() && m->is_public()) {
+ _supers->push(m);
+ }
}
+ return _supers;
+ }
+
+ // Iterate over arguments and compute scalarized and non-scalarized signatures
+ void CompiledEntrySignature::compute_calling_conventions(bool init) {
+ bool has_scalarized = false;
+ if (_method != nullptr) {
+ InstanceKlass* holder = _method->method_holder();
+ int arg_num = 0;
+ if (!_method->is_static()) {
+ // We shouldn't scalarize 'this' in a value class constructor
+ if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() && !_method->is_object_constructor() &&
+ (init || _method->is_scalarized_arg(arg_num))) {
+ _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
+ has_scalarized = true;
+ _has_inline_recv = true;
+ _num_inline_args++;
+ } else {
+ SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
+ }
+ SigEntry::add_entry(_sig, T_OBJECT, holder->name());
+ SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
+ arg_num++;
+ }
+ for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
+ BasicType bt = ss.type();
+ if (bt == T_OBJECT) {
+ InlineKlass* vk = ss.as_inline_klass(holder);
+ if (vk != nullptr && vk->can_be_passed_as_fields() && (init || _method->is_scalarized_arg(arg_num))) {
+ // Check for a calling convention mismatch with super method(s)
+ bool scalar_super = false;
+ bool non_scalar_super = false;
+ GrowableArray<Method*>* supers = get_supers();
+ for (int i = 0; i < supers->length(); ++i) {
+ Method* super_method = supers->at(i);
+ if (super_method->is_scalarized_arg(arg_num)) {
+ scalar_super = true;
+ } else {
+ non_scalar_super = true;
+ }
+ }
+ #ifdef ASSERT
+ // Randomly enable below code paths for stress testing
+ bool stress = init && StressCallingConvention;
+ if (stress && (os::random() & 1) == 1) {
+ non_scalar_super = true;
+ if ((os::random() & 1) == 1) {
+ scalar_super = true;
+ }
+ }
#endif
+ if (non_scalar_super) {
+ // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
+ if (scalar_super) {
+ // Found non-scalar *and* scalar super methods. We can't handle both.
+ // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
+ for (int i = 0; i < supers->length(); ++i) {
+ Method* super_method = supers->at(i);
+ if (super_method->is_scalarized_arg(arg_num) debug_only(|| (stress && (os::random() & 1) == 1))) {
+ super_method->set_mismatch();
+ MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
+ JavaThread* thread = JavaThread::current();
+ HandleMark hm(thread);
+ methodHandle mh(thread, super_method);
+ DeoptimizationScope deopt_scope;
+ CodeCache::mark_for_deoptimization(&deopt_scope, mh());
+ deopt_scope.deoptimize_marked();
+ }
+ }
+ }
+ // Fall back to non-scalarized calling convention
+ SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
+ SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
+ } else {
+ _num_inline_args++;
+ has_scalarized = true;
+ int last = _sig_cc->length();
+ int last_ro = _sig_cc_ro->length();
+ _sig_cc->appendAll(vk->extended_sig());
+ _sig_cc_ro->appendAll(vk->extended_sig());
+ if (bt == T_OBJECT) {
+ // Nullable inline type argument, insert InlineTypeNode::IsInit field right after T_METADATA delimiter
+ _sig_cc->insert_before(last+1, SigEntry(T_BOOLEAN, -1, nullptr));
+ _sig_cc_ro->insert_before(last_ro+1, SigEntry(T_BOOLEAN, -1, nullptr));
+ }
+ }
+ } else {
+ SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
+ SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
+ }
+ bt = T_OBJECT;
+ } else {
+ SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
+ SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
+ }
+ SigEntry::add_entry(_sig, bt, ss.as_symbol());
+ if (bt != T_VOID) {
+ arg_num++;
+ }
+ }
+ }
! // Compute the non-scalarized calling convention
+ _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
+ _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
+
+ // Compute the scalarized calling conventions if there are scalarized inline types in the signature
+ if (has_scalarized && !_method->is_native()) {
+ _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
+ _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
+
+ _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
+ _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
! _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
! _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
!
! // Upper bound on stack arguments to avoid hitting the argument limit and
! // bailing out of compilation ("unsupported incoming calling sequence").
+ // TODO we need a reasonable limit (flag?) here
+ if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 60) {
+ return; // Success
}
}
!
+ // No scalarized args
+ _sig_cc = _sig;
+ _regs_cc = _regs;
+ _args_on_stack_cc = _args_on_stack;
+
+ _sig_cc_ro = _sig;
+ _regs_cc_ro = _regs;
+ _args_on_stack_cc_ro = _args_on_stack;
+ }
AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
// Use customized signature handler. Need to lock around updates to
// the _adapter_handler_table (it is not safe for concurrent readers
// and a single writer: this could be fixed if it becomes a
}
ResourceMark rm;
AdapterBlob* new_adapter = nullptr;
! // Fill in the signature array, for the calling-convention call.
! int total_args_passed = method->size_of_parameters(); // All args on stack
- AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
- method->is_static(), total_args_passed);
- assert(si.slots() == total_args_passed, "");
- BasicType* sig_bt = si.basic_types();
{
MutexLocker mu(AdapterHandlerLibrary_lock);
// Lookup method signature's fingerprint
! entry = lookup(total_args_passed, sig_bt);
if (entry != nullptr) {
#ifdef ASSERT
if (VerifyAdapterSharing) {
AdapterBlob* comparison_blob = nullptr;
! AdapterHandlerEntry* comparison_entry = create_adapter(comparison_blob, total_args_passed, sig_bt, false);
assert(comparison_blob == nullptr, "no blob should be created when creating an adapter for comparison");
assert(comparison_entry->compare_code(entry), "code must match");
// Release the one just created and return the original
delete comparison_entry;
}
#endif
return entry;
}
! entry = create_adapter(new_adapter, total_args_passed, sig_bt, /* allocate_code_blob */ true);
}
// Outside of the lock
if (new_adapter != nullptr) {
post_adapter_creation(new_adapter, entry);
}
return entry;
}
AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(AdapterBlob*& new_adapter,
! int total_args_passed,
- BasicType* sig_bt,
bool allocate_code_blob) {
if (log_is_enabled(Info, perf, class, link)) {
ClassLoader::perf_method_adapters_count()->inc();
}
}
ResourceMark rm;
AdapterBlob* new_adapter = nullptr;
! CompiledEntrySignature ces(method());
! ces.compute_calling_conventions();
+ if (ces.has_scalarized_args()) {
+ if (!method->has_scalarized_args()) {
+ method->set_has_scalarized_args();
+ }
+ if (ces.c1_needs_stack_repair()) {
+ method->set_c1_needs_stack_repair();
+ }
+ if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
+ method->set_c2_needs_stack_repair();
+ }
+ } else if (method->is_abstract()) {
+ return _abstract_method_handler;
+ }
{
MutexLocker mu(AdapterHandlerLibrary_lock);
+ if (ces.has_scalarized_args() && method->is_abstract()) {
+ // Save a C heap allocated version of the signature for abstract methods with scalarized inline type arguments
+ address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub();
+ entry = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(nullptr),
+ SharedRuntime::throw_AbstractMethodError_entry(),
+ wrong_method_abstract, wrong_method_abstract, wrong_method_abstract,
+ wrong_method_abstract, wrong_method_abstract);
+ GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtInternal);
+ heap_sig->appendAll(ces.sig_cc_ro());
+ entry->set_sig_cc(heap_sig);
+ return entry;
+ }
+
// Lookup method signature's fingerprint
! entry = lookup(ces.sig_cc(), ces.has_inline_recv());
if (entry != nullptr) {
#ifdef ASSERT
if (VerifyAdapterSharing) {
AdapterBlob* comparison_blob = nullptr;
! AdapterHandlerEntry* comparison_entry = create_adapter(comparison_blob, ces, false);
assert(comparison_blob == nullptr, "no blob should be created when creating an adapter for comparison");
assert(comparison_entry->compare_code(entry), "code must match");
// Release the one just created and return the original
delete comparison_entry;
}
#endif
return entry;
}
! entry = create_adapter(new_adapter, ces, /* allocate_code_blob */ true);
}
// Outside of the lock
if (new_adapter != nullptr) {
post_adapter_creation(new_adapter, entry);
}
return entry;
}
AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(AdapterBlob*& new_adapter,
! CompiledEntrySignature& ces,
bool allocate_code_blob) {
if (log_is_enabled(Info, perf, class, link)) {
ClassLoader::perf_method_adapters_count()->inc();
}
// VerifyAdapterCalls and VerifyAdapterSharing can fail if we re-use code that generated prior
// to all StubRoutines::_final_stubs_code being set. Checks refer to runtime range checks generated
// in an I2C stub that ensure that an I2C stub is called from an interpreter frame or stubs.
bool contains_all_checks = StubRoutines::final_stubs_code() != nullptr;
- VMRegPair stack_regs[16];
- VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
-
- // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
- int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
CodeBuffer buffer(buf);
short buffer_locs[20];
buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
sizeof(buffer_locs)/sizeof(relocInfo));
// Make a C heap allocated version of the fingerprint to store in the adapter
! AdapterFingerPrint* fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt);
MacroAssembler _masm(&buffer);
AdapterHandlerEntry* entry = SharedRuntime::generate_i2c2i_adapters(&_masm,
! total_args_passed,
! comp_args_on_stack,
! sig_bt,
! regs,
! fingerprint);
#ifdef ASSERT
if (VerifyAdapterSharing) {
entry->save_code(buf->code_begin(), buffer.insts_size());
if (!allocate_code_blob) {
return entry;
}
}
#endif
- new_adapter = AdapterBlob::create(&buffer);
NOT_PRODUCT(int insts_size = buffer.insts_size());
if (new_adapter == nullptr) {
// CodeCache is full, disable compilation
// Ought to log this but compile log is only per compile thread
// and we're some non descript Java thread.
// VerifyAdapterCalls and VerifyAdapterSharing can fail if we re-use code that generated prior
// to all StubRoutines::_final_stubs_code being set. Checks refer to runtime range checks generated
// in an I2C stub that ensure that an I2C stub is called from an interpreter frame or stubs.
bool contains_all_checks = StubRoutines::final_stubs_code() != nullptr;
BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
CodeBuffer buffer(buf);
short buffer_locs[20];
buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
sizeof(buffer_locs)/sizeof(relocInfo));
// Make a C heap allocated version of the fingerprint to store in the adapter
! AdapterFingerPrint* fingerprint = new AdapterFingerPrint(ces.sig_cc(), ces.has_inline_recv());
MacroAssembler _masm(&buffer);
AdapterHandlerEntry* entry = SharedRuntime::generate_i2c2i_adapters(&_masm,
! ces.args_on_stack(),
! ces.sig(),
! ces.regs(),
! ces.sig_cc(),
! ces.regs_cc(),
+ ces.sig_cc_ro(),
+ ces.regs_cc_ro(),
+ fingerprint,
+ new_adapter,
+ allocate_code_blob);
+
+ if (ces.has_scalarized_args()) {
+ // Save a C heap allocated version of the scalarized signature and store it in the adapter
+ GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
+ heap_sig->appendAll(ces.sig_cc());
+ entry->set_sig_cc(heap_sig);
+ }
#ifdef ASSERT
if (VerifyAdapterSharing) {
entry->save_code(buf->code_begin(), buffer.insts_size());
if (!allocate_code_blob) {
return entry;
}
}
#endif
NOT_PRODUCT(int insts_size = buffer.insts_size());
if (new_adapter == nullptr) {
// CodeCache is full, disable compilation
// Ought to log this but compile log is only per compile thread
// and we're some non descript Java thread.
address AdapterHandlerEntry::base_address() {
address base = _i2c_entry;
if (base == nullptr) base = _c2i_entry;
assert(base <= _c2i_entry || _c2i_entry == nullptr, "");
+ assert(base <= _c2i_inline_entry || _c2i_inline_entry == nullptr, "");
+ assert(base <= _c2i_inline_ro_entry || _c2i_inline_ro_entry == nullptr, "");
assert(base <= _c2i_unverified_entry || _c2i_unverified_entry == nullptr, "");
+ assert(base <= _c2i_unverified_inline_entry || _c2i_unverified_inline_entry == nullptr, "");
assert(base <= _c2i_no_clinit_check_entry || _c2i_no_clinit_check_entry == nullptr, "");
return base;
}
void AdapterHandlerEntry::relocate(address new_base) {
ptrdiff_t delta = new_base - old_base;
if (_i2c_entry != nullptr)
_i2c_entry += delta;
if (_c2i_entry != nullptr)
_c2i_entry += delta;
+ if (_c2i_inline_entry != nullptr)
+ _c2i_inline_entry += delta;
+ if (_c2i_inline_ro_entry != nullptr)
+ _c2i_inline_ro_entry += delta;
if (_c2i_unverified_entry != nullptr)
_c2i_unverified_entry += delta;
+ if (_c2i_unverified_inline_entry != nullptr)
+ _c2i_unverified_inline_entry += delta;
if (_c2i_no_clinit_check_entry != nullptr)
_c2i_no_clinit_check_entry += delta;
assert(base_address() == new_base, "");
}
AdapterHandlerEntry::~AdapterHandlerEntry() {
delete _fingerprint;
+ if (_sig_cc != nullptr) {
+ delete _sig_cc;
+ }
#ifdef ASSERT
FREE_C_HEAP_ARRAY(unsigned char, _saved_code);
#endif
}
MacroAssembler _masm(&buffer);
// Fill in the signature array, for the calling-convention call.
const int total_args_passed = method->size_of_parameters();
VMRegPair stack_regs[16];
VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
! AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
! method->is_static(), total_args_passed);
! BasicType* sig_bt = si.basic_types();
! assert(si.slots() == total_args_passed, "");
! BasicType ret_type = si.return_type();
// Now get the compiled-Java arguments layout.
SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
// Generate the compiled-to-native wrapper code
MacroAssembler _masm(&buffer);
// Fill in the signature array, for the calling-convention call.
const int total_args_passed = method->size_of_parameters();
+ BasicType stack_sig_bt[16];
VMRegPair stack_regs[16];
+ BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
! int i = 0;
! if (!method->is_static()) { // Pass in receiver first
! sig_bt[i++] = T_OBJECT;
! }
! SignatureStream ss(method->signature());
+ for (; !ss.at_return_type(); ss.next()) {
+ sig_bt[i++] = ss.type(); // Collect remaining bits of signature
+ if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
+ sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
+ }
+ }
+ assert(i == total_args_passed, "");
+ BasicType ret_type = ss.type();
// Now get the compiled-Java arguments layout.
SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
// Generate the compiled-to-native wrapper code
st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
}
if (get_c2i_entry() != nullptr) {
st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
}
if (get_c2i_unverified_entry() != nullptr) {
! st->print(" c2iUV: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
}
if (get_c2i_no_clinit_check_entry() != nullptr) {
st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
}
st->cr();
st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
}
if (get_c2i_entry() != nullptr) {
st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
}
+ if (get_c2i_entry() != nullptr) {
+ st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
+ }
+ if (get_c2i_entry() != nullptr) {
+ st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
+ }
if (get_c2i_unverified_entry() != nullptr) {
! st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
+ }
+ if (get_c2i_unverified_entry() != nullptr) {
+ st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
}
if (get_c2i_no_clinit_check_entry() != nullptr) {
st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
}
st->cr();
if (new_obj == nullptr) return;
BarrierSet *bs = BarrierSet::barrier_set();
bs->on_slowpath_allocation_exit(current, new_obj);
}
+
+ // We are at a compiled code to interpreter call. We need backing
+ // buffers for all inline type arguments. Allocate an object array to
+ // hold them (convenient because once we're done with it we don't have
+ // to worry about freeing it).
+ oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS) {
+ assert(InlineTypePassFieldsAsArgs, "no reason to call this");
+ ResourceMark rm;
+
+ int nb_slots = 0;
+ InstanceKlass* holder = callee->method_holder();
+ allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
+ if (allocate_receiver) {
+ nb_slots++;
+ }
+ int arg_num = callee->is_static() ? 0 : 1;
+ for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
+ BasicType bt = ss.type();
+ if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
+ nb_slots++;
+ }
+ if (bt != T_VOID) {
+ arg_num++;
+ }
+ }
+ objArrayOop array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
+ objArrayHandle array(THREAD, array_oop);
+ arg_num = callee->is_static() ? 0 : 1;
+ int i = 0;
+ if (allocate_receiver) {
+ InlineKlass* vk = InlineKlass::cast(holder);
+ oop res = vk->allocate_instance(CHECK_NULL);
+ array->obj_at_put(i++, res);
+ }
+ for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
+ BasicType bt = ss.type();
+ if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
+ InlineKlass* vk = ss.as_inline_klass(holder);
+ assert(vk != nullptr, "Unexpected klass");
+ oop res = vk->allocate_instance(CHECK_NULL);
+ array->obj_at_put(i++, res);
+ }
+ if (bt != T_VOID) {
+ arg_num++;
+ }
+ }
+ return array();
+ }
+
+ JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
+ methodHandle callee(current, callee_method);
+ oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, CHECK);
+ current->set_vm_result(array);
+ current->set_vm_result_2(callee()); // TODO: required to keep callee live?
+ JRT_END
+
+ // We're returning from an interpreted method: load each field into a
+ // register following the calling convention
+ JRT_LEAF(void, SharedRuntime::load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res))
+ {
+ assert(res->klass()->is_inline_klass(), "only inline types here");
+ ResourceMark rm;
+ RegisterMap reg_map(current,
+ RegisterMap::UpdateMap::include,
+ RegisterMap::ProcessFrames::include,
+ RegisterMap::WalkContinuation::skip);
+ frame stubFrame = current->last_frame();
+ frame callerFrame = stubFrame.sender(®_map);
+ assert(callerFrame.is_interpreted_frame(), "should be coming from interpreter");
+
+ InlineKlass* vk = InlineKlass::cast(res->klass());
+
+ const Array<SigEntry>* sig_vk = vk->extended_sig();
+ const Array<VMRegPair>* regs = vk->return_regs();
+
+ if (regs == nullptr) {
+ // The fields of the inline klass don't fit in registers, bail out
+ return;
+ }
+
+ int j = 1;
+ for (int i = 0; i < sig_vk->length(); i++) {
+ BasicType bt = sig_vk->at(i)._bt;
+ if (bt == T_METADATA) {
+ continue;
+ }
+ if (bt == T_VOID) {
+ if (sig_vk->at(i-1)._bt == T_LONG ||
+ sig_vk->at(i-1)._bt == T_DOUBLE) {
+ j++;
+ }
+ continue;
+ }
+ int off = sig_vk->at(i)._offset;
+ assert(off > 0, "offset in object should be positive");
+ VMRegPair pair = regs->at(j);
+ address loc = reg_map.location(pair.first(), nullptr);
+ switch(bt) {
+ case T_BOOLEAN:
+ *(jboolean*)loc = res->bool_field(off);
+ break;
+ case T_CHAR:
+ *(jchar*)loc = res->char_field(off);
+ break;
+ case T_BYTE:
+ *(jbyte*)loc = res->byte_field(off);
+ break;
+ case T_SHORT:
+ *(jshort*)loc = res->short_field(off);
+ break;
+ case T_INT: {
+ *(jint*)loc = res->int_field(off);
+ break;
+ }
+ case T_LONG:
+ #ifdef _LP64
+ *(intptr_t*)loc = res->long_field(off);
+ #else
+ Unimplemented();
+ #endif
+ break;
+ case T_OBJECT:
+ case T_ARRAY: {
+ *(oop*)loc = res->obj_field(off);
+ break;
+ }
+ case T_FLOAT:
+ *(jfloat*)loc = res->float_field(off);
+ break;
+ case T_DOUBLE:
+ *(jdouble*)loc = res->double_field(off);
+ break;
+ default:
+ ShouldNotReachHere();
+ }
+ j++;
+ }
+ assert(j == regs->length(), "missed a field?");
+
+ #ifdef ASSERT
+ VMRegPair pair = regs->at(0);
+ address loc = reg_map.location(pair.first(), nullptr);
+ assert(*(oopDesc**)loc == res, "overwritten object");
+ #endif
+
+ current->set_vm_result(res);
+ }
+ JRT_END
+
+ // We've returned to an interpreted method, the interpreter needs a
+ // reference to an inline type instance. Allocate it and initialize it
+ // from field's values in registers.
+ JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
+ {
+ ResourceMark rm;
+ RegisterMap reg_map(current,
+ RegisterMap::UpdateMap::include,
+ RegisterMap::ProcessFrames::include,
+ RegisterMap::WalkContinuation::skip);
+ frame stubFrame = current->last_frame();
+ frame callerFrame = stubFrame.sender(®_map);
+
+ #ifdef ASSERT
+ InlineKlass* verif_vk = InlineKlass::returned_inline_klass(reg_map);
+ #endif
+
+ if (!is_set_nth_bit(res, 0)) {
+ // We're not returning with inline type fields in registers (the
+ // calling convention didn't allow it for this inline klass)
+ assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
+ current->set_vm_result((oopDesc*)res);
+ assert(verif_vk == nullptr, "broken calling convention");
+ return;
+ }
+
+ clear_nth_bit(res, 0);
+ InlineKlass* vk = (InlineKlass*)res;
+ assert(verif_vk == vk, "broken calling convention");
+ assert(Metaspace::contains((void*)res), "should be klass");
+
+ // Allocate handles for every oop field so they are safe in case of
+ // a safepoint when allocating
+ GrowableArray<Handle> handles;
+ vk->save_oop_fields(reg_map, handles);
+
+ // It's unsafe to safepoint until we are here
+ JRT_BLOCK;
+ {
+ JavaThread* THREAD = current;
+ oop vt = vk->realloc_result(reg_map, handles, CHECK);
+ current->set_vm_result(vt);
+ }
+ JRT_BLOCK_END;
+ }
+ JRT_END
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