Skip to content


8256368: Avoid repeated upcalls into Java to re-resolve MH/VH linkers…
Browse files Browse the repository at this point in the history

Reviewed-by: dlong, kvn
  • Loading branch information
Vladimir Ivanov committed Feb 14, 2022
1 parent 95f198b commit 534e557
Show file tree
Hide file tree
Showing 5 changed files with 35 additions and 25 deletions.
6 changes: 3 additions & 3 deletions src/hotspot/share/classfile/systemDictionary.cpp
Expand Up @@ -2078,9 +2078,9 @@ static Method* unpack_method_and_appendix(Handle mname,
Method* SystemDictionary::find_method_handle_invoker(Klass* klass,
Symbol* name,
Symbol* signature,
Klass* accessing_klass,
Handle *appendix_result,
Klass* accessing_klass,
Handle* appendix_result,
assert(THREAD->can_call_java() ,"");
Handle method_type =
SystemDictionary::find_method_handle_type(signature, accessing_klass, CHECK_NULL);
Expand Down
4 changes: 2 additions & 2 deletions src/hotspot/share/interpreter/bootstrapInfo.cpp
Expand Up @@ -67,7 +67,7 @@ bool BootstrapInfo::resolve_previously_linked_invokedynamic(CallInfo& result, TR
if (!cpce->is_f1_null()) {
methodHandle method( THREAD, cpce->f1_as_method());
Handle appendix( THREAD, cpce->appendix_if_resolved(_pool));
result.set_handle(method, appendix, THREAD);
result.set_handle(vmClasses::MethodHandle_klass(), method, appendix, THREAD);
Exceptions::wrap_dynamic_exception(/* is_indy */ true, CHECK_false);
return true;
} else if (cpce->indy_resolution_failed()) {
Expand Down Expand Up @@ -221,7 +221,7 @@ bool BootstrapInfo::save_and_throw_indy_exc(TRAPS) {

void BootstrapInfo::resolve_newly_linked_invokedynamic(CallInfo& result, TRAPS) {
assert(is_resolved(), "");
result.set_handle(resolved_method(), resolved_appendix(), CHECK);
result.set_handle(vmClasses::MethodHandle_klass(), resolved_method(), resolved_appendix(), CHECK);

void BootstrapInfo::print_msg_on(outputStream* st, const char* msg) {
Expand Down
41 changes: 25 additions & 16 deletions src/hotspot/share/interpreter/linkResolver.cpp
Expand Up @@ -94,11 +94,6 @@ void CallInfo::set_virtual(Klass* resolved_klass,
assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");

void CallInfo::set_handle(const methodHandle& resolved_method,
Handle resolved_appendix, TRAPS) {
set_handle(vmClasses::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);

void CallInfo::set_handle(Klass* resolved_klass,
const methodHandle& resolved_method,
Handle resolved_appendix, TRAPS) {
Expand Down Expand Up @@ -476,14 +471,12 @@ Method* LinkResolver::lookup_polymorphic_method(const LinkInfo& link_info,

Handle appendix;
Handle method_type;
Method* result = SystemDictionary::find_method_handle_invoker(
Method* result = SystemDictionary::find_method_handle_invoker(klass,
if (lt_mh.is_enabled()) {
LogStream ls(lt_mh);
ls.print("lookup_polymorphic_method => (via Java) ");
Expand Down Expand Up @@ -621,7 +614,7 @@ Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
Klass* resolved_klass = link_info.resolved_klass();

if (pool->has_preresolution()
|| (resolved_klass == vmClasses::MethodHandle_klass() &&
|| ((resolved_klass == vmClasses::MethodHandle_klass() || resolved_klass == vmClasses::VarHandle_klass()) &&
MethodHandles::is_signature_polymorphic_name(resolved_klass, {
Method* result = ConstantPool::method_at_if_loaded(pool, index);
if (result != NULL) {
Expand Down Expand Up @@ -1679,15 +1672,31 @@ void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const
resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);

bool LinkResolver::resolve_previously_linked_invokehandle(CallInfo& result, const LinkInfo& link_info, const constantPoolHandle& pool, int index, TRAPS) {
int cache_index = ConstantPool::decode_cpcache_index(index, true);
ConstantPoolCacheEntry* cpce = pool->cache()->entry_at(cache_index);
if (!cpce->is_f1_null()) {
Klass* resolved_klass = link_info.resolved_klass();
methodHandle method(THREAD, cpce->f1_as_method());
Handle appendix(THREAD, cpce->appendix_if_resolved(pool));
result.set_handle(resolved_klass, method, appendix, CHECK_false);
return true;
} else {
return false;

void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
// This guy is reached from InterpreterRuntime::resolve_invokehandle.
LinkInfo link_info(pool, index, CHECK);
if (log_is_enabled(Info, methodhandles)) {
ResourceMark rm(THREAD);
log_info(methodhandles)("resolve_invokehandle %s %s",>as_C_string(),
{ // Check if the call site has been bound already, and short circuit:
bool is_done = resolve_previously_linked_invokehandle(result, link_info, pool, index, CHECK);
if (is_done) return;
resolve_handle_call(result, link_info, CHECK);

Expand All @@ -1699,7 +1708,7 @@ void LinkResolver::resolve_handle_call(CallInfo& result,
assert(resolved_klass == vmClasses::MethodHandle_klass() ||
resolved_klass == vmClasses::VarHandle_klass(), "");
assert(MethodHandles::is_signature_polymorphic_name(, "");
Handle resolved_appendix;
Handle resolved_appendix;
Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
Expand Down
8 changes: 5 additions & 3 deletions src/hotspot/share/interpreter/linkResolver.hpp
Expand Up @@ -66,8 +66,6 @@ class CallInfo : public StackObj {
const methodHandle& resolved_method,
const methodHandle& selected_method,
int vtable_index, TRAPS);
void set_handle(const methodHandle& resolved_method,
Handle resolved_appendix, TRAPS);
void set_handle(Klass* resolved_klass,
const methodHandle& resolved_method,
Handle resolved_appendix, TRAPS);
Expand Down Expand Up @@ -249,6 +247,11 @@ class LinkResolver: AllStatic {
Klass* recv_klass,
bool check_null_and_abstract, TRAPS);

static bool resolve_previously_linked_invokehandle(CallInfo& result,
const LinkInfo& link_info,
const constantPoolHandle& pool,
int index, TRAPS);

static void check_field_accessability(Klass* ref_klass,
Klass* resolved_klass,
Klass* sel_klass,
Expand Down Expand Up @@ -337,7 +340,6 @@ class LinkResolver: AllStatic {
const methodHandle& attached_method,
Bytecodes::Code byte, TRAPS);

// Only resolved method known.
static void throw_abstract_method_error(const methodHandle& resolved_method, TRAPS) {
throw_abstract_method_error(resolved_method, methodHandle(), NULL, CHECK);
Expand Down
1 change: 0 additions & 1 deletion test/jdk/ProblemList-Xcomp.txt
Expand Up @@ -28,4 +28,3 @@

java/lang/invoke/MethodHandles/ 8146623 generic-all
java/util/stream/test/org/openjdk/tests/java/util/stream/ 8256368 generic-all

3 comments on commit 534e557

Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

/backport jdk17u-dev

Copy link

@openjdk openjdk bot commented on 534e557 Mar 30, 2022

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@TheRealMDoerr the backport was successfully created on the branch TheRealMDoerr-backport-534e5578 in my personal fork of openjdk/jdk17u-dev. To create a pull request with this backport targeting openjdk/jdk17u-dev:master, just click the following link:

➡️ Create pull request

The title of the pull request is automatically filled in correctly and below you find a suggestion for the pull request body:

Hi all,

This pull request contains a backport of commit 534e5578 from the openjdk/jdk repository.

The commit being backported was authored by Vladimir Ivanov on 14 Feb 2022 and was reviewed by Dean Long and Vladimir Kozlov.


If you need to update the source branch of the pull then run the following commands in a local clone of your personal fork of openjdk/jdk17u-dev:

$ git fetch TheRealMDoerr-backport-534e5578:TheRealMDoerr-backport-534e5578
$ git checkout TheRealMDoerr-backport-534e5578
# make changes
$ git add paths/to/changed/files
$ git commit --message 'Describe additional changes made'
$ git push TheRealMDoerr-backport-534e5578

Please sign in to comment.