Skip to content

8356075: Support Shenandoah GC in JVMCI #25001

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 11 commits into from
Closed

8356075: Support Shenandoah GC in JVMCI #25001

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
11 commits
Select commit Hold shift + click to select a range
344955a
Graal Shenandoah support
rkennke Apr 2, 2025
956bbec
Revert "8321373: Build should use LC_ALL=C.UTF-8"
rkennke Apr 9, 2025
0bcdb7d
Support for Shenandoah card-table barriers in JVMCI
rkennke Apr 17, 2025
2f54728
Merge branch 'master' into graal-shenandoah-support
rkennke Apr 30, 2025
f54cb48
Revert unrelated changes
rkennke May 2, 2025
1543e8f
Revert unrelated changes
rkennke May 2, 2025
25a8a6f
Remove unnecessary stuff
rkennke May 2, 2025
6487a9f
Fix ordering of includes
rkennke May 2, 2025
c95313a
Initialize cardtable_start_address to nullptr
rkennke May 5, 2025
4434458
Align backslashes
rkennke May 5, 2025
41084f3
Simplify pre-barrier runtime entry
rkennke May 5, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,9 @@
#include "utilities/events.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/powerOfTwo.hpp"
#if INCLUDE_JVMCI
#include "jvmci/jvmci.hpp"
#endif
#if INCLUDE_JFR
#include "gc/shenandoah/shenandoahJfrSupport.hpp"
#endif
Expand Down Expand Up @@ -2233,6 +2236,9 @@ void ShenandoahHeap::stw_unload_classes(bool full_gc) {
ShenandoahGCWorkerPhase worker_phase(phase);
bool unloading_occurred = SystemDictionary::do_unloading(gc_timer());

// Clean JVMCI metadata handles.
JVMCI_ONLY(JVMCI::do_unloading(unloading_occurred));

uint num_workers = _workers->active_workers();
ShenandoahClassUnloadingTask unlink_task(phase, num_workers, unloading_occurred);
_workers->run_task(&unlink_task);
Expand Down
4 changes: 4 additions & 0 deletions src/hotspot/share/gc/shenandoah/shenandoahRuntime.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,10 @@ JRT_LEAF(void, ShenandoahRuntime::write_ref_field_pre(oopDesc * orig, JavaThread
ShenandoahBarrierSet::satb_mark_queue_set().enqueue_known_active(queue, orig);
JRT_END

void ShenandoahRuntime::write_barrier_pre(oopDesc* orig) {
write_ref_field_pre(orig, JavaThread::current());
}

JRT_LEAF(oopDesc*, ShenandoahRuntime::load_reference_barrier_strong(oopDesc* src, oop* load_addr))
return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_mutator(src, load_addr);
JRT_END
Expand Down
1 change: 1 addition & 0 deletions src/hotspot/share/gc/shenandoah/shenandoahRuntime.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@ class ShenandoahRuntime : public AllStatic {
static void arraycopy_barrier_narrow_oop(narrowOop* src, narrowOop* dst, size_t length);

static void write_ref_field_pre(oopDesc* orig, JavaThread* thread);
static void write_barrier_pre(oopDesc* orig);

static oopDesc* load_reference_barrier_strong(oopDesc* src, oop* load_addr);
static oopDesc* load_reference_barrier_strong_narrow(oopDesc* src, narrowOop* load_addr);
Expand Down
4 changes: 4 additions & 0 deletions src/hotspot/share/jvmci/jvmciCompilerToVM.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,10 @@ class CompilerToVM {
#if INCLUDE_ZGC
static int sizeof_ZStoreBarrierEntry;
#endif
#if INCLUDE_SHENANDOAHGC
static address shenandoah_in_cset_fast_test_addr;
static int shenandoah_region_size_bytes_shift;
#endif

#ifdef X86
static int L1_line_size;
Expand Down
19 changes: 19 additions & 0 deletions src/hotspot/share/jvmci/jvmciCompilerToVMInit.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,10 @@
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "utilities/resourceHash.hpp"
#if INCLUDE_SHENANDOAHGC
#include "gc/shenandoah/shenandoahHeap.hpp"
#include "gc/shenandoah/shenandoahHeapRegion.hpp"
#endif

int CompilerToVM::Data::oopDesc_klass_offset_in_bytes;
int CompilerToVM::Data::arrayOopDesc_length_offset_in_bytes;
Expand Down Expand Up @@ -86,6 +90,11 @@ address CompilerToVM::Data::ZPointerVectorLoadBadMask_address;
address CompilerToVM::Data::ZPointerVectorStoreBadMask_address;
address CompilerToVM::Data::ZPointerVectorStoreGoodMask_address;

#if INCLUDE_SHENANDOAHGC
address CompilerToVM::Data::shenandoah_in_cset_fast_test_addr;
int CompilerToVM::Data::shenandoah_region_size_bytes_shift;
#endif

bool CompilerToVM::Data::continuations_enabled;

#ifdef AARCH64
Expand Down Expand Up @@ -227,12 +236,22 @@ void CompilerToVM::Data::initialize(JVMCI_TRAPS) {
assert(base != nullptr, "unexpected byte_map_base");
cardtable_start_address = base;
cardtable_shift = CardTable::card_shift();
} else if (bs->is_a(BarrierSet::ShenandoahBarrierSet)) {
Copy link
Member

@dougxc dougxc May 6, 2025 •
edited
Loading

Choose a reason for hiding this comment

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

This change is causing a failure in mach5 tier 1:

[2025-05-06T11:34:44,742Z] /workspace/open/src/hotspot/share/jvmci/jvmciCompilerToVMInit.cpp:239:35: error: no member named 'ShenandoahBarrierSet' in 'BarrierSet'
[2025-05-06T11:34:44,742Z]   } else if (bs->is_a(BarrierSet::ShenandoahBarrierSet)) {
[2025-05-06T11:34:44,742Z]                       ~~~~~~~~~~~~^
[2025-05-06T11:34:45,729Z] 1 error generated.

I assume it's missing #if INCLUDE_SHENANDOAHGC.

https://bugs.openjdk.org/browse/JDK-8356265

cardtable_start_address = nullptr;
cardtable_shift = CardTable::card_shift();
} else {
// No card mark barriers
cardtable_start_address = nullptr;
cardtable_shift = 0;
}

#if INCLUDE_SHENANDOAHGC
if (UseShenandoahGC) {
shenandoah_in_cset_fast_test_addr = ShenandoahHeap::in_cset_fast_test_addr();
shenandoah_region_size_bytes_shift = ShenandoahHeapRegion::region_size_bytes_shift_jint();
}
#endif

#ifdef X86
L1_line_size = VM_Version::L1_line_size();
#endif
Expand Down
2 changes: 1 addition & 1 deletion src/hotspot/share/jvmci/jvmci_globals.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -229,7 +229,7 @@ bool JVMCIGlobals::enable_jvmci_product_mode(JVMFlagOrigin origin, bool use_graa
}

bool JVMCIGlobals::gc_supports_jvmci() {
return UseSerialGC || UseParallelGC || UseG1GC || UseZGC || UseEpsilonGC;
return UseSerialGC || UseParallelGC || UseG1GC || UseZGC || UseShenandoahGC || UseEpsilonGC;
}

void JVMCIGlobals::check_jvmci_supported_gc() {
Expand Down
27 changes: 27 additions & 0 deletions src/hotspot/share/jvmci/vmStructs_jvmci.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,10 @@
#include "gc/z/zBarrierSetRuntime.hpp"
#include "gc/z/zThreadLocalData.hpp"
#endif
#if INCLUDE_SHENANDOAHGC
#include "gc/shenandoah/shenandoahRuntime.hpp"
#include "gc/shenandoah/shenandoahThreadLocalData.hpp"
#endif

#define VM_STRUCTS(nonstatic_field, static_field, unchecked_nonstatic_field, volatile_nonstatic_field) \
static_field(CompilerToVM::Data, oopDesc_klass_offset_in_bytes, int) \
Expand Down Expand Up @@ -129,6 +133,8 @@
static_field(CompilerToVM::Data, sizeof_arrayOopDesc, int) \
static_field(CompilerToVM::Data, sizeof_BasicLock, int) \
ZGC_ONLY(static_field(CompilerToVM::Data, sizeof_ZStoreBarrierEntry, int)) \
SHENANDOAHGC_ONLY(static_field(CompilerToVM::Data, shenandoah_in_cset_fast_test_addr, address)) \
SHENANDOAHGC_ONLY(static_field(CompilerToVM::Data, shenandoah_region_size_bytes_shift,int)) \
\
static_field(CompilerToVM::Data, dsin, address) \
static_field(CompilerToVM::Data, dcos, address) \
Expand Down Expand Up @@ -895,6 +901,13 @@
declare_function(JVMCIRuntime::load_and_clear_exception) \
G1GC_ONLY(declare_function(JVMCIRuntime::write_barrier_pre)) \
G1GC_ONLY(declare_function(JVMCIRuntime::write_barrier_post)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_strong)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_strong_narrow)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_weak)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_weak_narrow)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_phantom)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::load_reference_barrier_phantom_narrow)) \
SHENANDOAHGC_ONLY(declare_function(ShenandoahRuntime::write_barrier_pre)) \
declare_function(JVMCIRuntime::validate_object) \
\
declare_function(JVMCIRuntime::test_deoptimize_call_int)
Expand Down Expand Up @@ -941,6 +954,15 @@

#endif // INCLUDE_ZGC

#if INCLUDE_SHENANDOAHGC

#define VM_INT_CONSTANTS_JVMCI_SHENANDOAH(declare_constant, declare_constant_with_value, declare_preprocessor_constant) \
declare_constant_with_value("ShenandoahThreadLocalData::gc_state_offset", in_bytes(ShenandoahThreadLocalData::gc_state_offset())) \
declare_constant_with_value("ShenandoahThreadLocalData::satb_mark_queue_index_offset", in_bytes(ShenandoahThreadLocalData::satb_mark_queue_index_offset())) \
declare_constant_with_value("ShenandoahThreadLocalData::satb_mark_queue_buffer_offset", in_bytes(ShenandoahThreadLocalData::satb_mark_queue_buffer_offset())) \
declare_constant_with_value("ShenandoahThreadLocalData::card_table_offset", in_bytes(ShenandoahThreadLocalData::card_table_offset())) \

#endif

#ifdef LINUX

Expand Down Expand Up @@ -1063,6 +1085,11 @@ VMIntConstantEntry JVMCIVMStructs::localHotSpotVMIntConstants[] = {
GENERATE_VM_INT_CONSTANT_WITH_VALUE_ENTRY,
GENERATE_PREPROCESSOR_VM_INT_CONSTANT_ENTRY)
#endif
#if INCLUDE_SHENANDOAHGC
VM_INT_CONSTANTS_JVMCI_SHENANDOAH(GENERATE_VM_INT_CONSTANT_ENTRY,
GENERATE_VM_INT_CONSTANT_WITH_VALUE_ENTRY,
GENERATE_PREPROCESSOR_VM_INT_CONSTANT_ENTRY)
#endif
#ifdef VM_INT_CPU_FEATURE_CONSTANTS
VM_INT_CPU_FEATURE_CONSTANTS
#endif
Expand Down