Merge

src/hotspot/cpu/s390/c1_CodeStubs_s390.cpp

@@ -294,7 +294,7 @@ void PatchingStub::align_patch_site(MacroAssembler* masm) {
 void PatchingStub::emit_code(LIR_Assembler* ce) {
   // Copy original code here.
   assert(NativeGeneralJump::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
-         "not enough room for call");
+         "not enough room for call, need %d", _bytes_to_copy);
 
   NearLabel call_patch;
 
@@ -331,7 +331,7 @@ void PatchingStub::emit_code(LIR_Assembler* ce) {
     }
 #endif
   } else {
-    // Make a copy the code which is going to be patched.
+    // Make a copy of the code which is going to be patched.
     for (int i = 0; i < _bytes_to_copy; i++) {
       address ptr = (address)(_pc_start + i);
       int a_byte = (*ptr) & 0xFF;

src/hotspot/cpu/s390/c1_LIRAssembler_s390.cpp

@@ -897,7 +897,7 @@ void LIR_Assembler::mem2reg(LIR_Opr src_opr, LIR_Opr dest, BasicType type, LIR_P
   bool needs_patching = (patch_code != lir_patch_none);
 
   if (addr->base()->type() == T_OBJECT) {
-    __ verify_oop(src);
+    __ verify_oop(src, FILE_AND_LINE);
   }
 
   PatchingStub* patch = NULL;
@@ -972,7 +972,7 @@ void LIR_Assembler::mem2reg(LIR_Opr src_opr, LIR_Opr dest, BasicType type, LIR_P
       } else {
         __ z_lg(dest->as_register(), disp_value, disp_reg, src);
       }
-      __ verify_oop(dest->as_register());
+      __ verify_oop(dest->as_register(), FILE_AND_LINE);
       break;
     }
     case T_FLOAT:
@@ -1006,7 +1006,7 @@ void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
   if (dest->is_single_cpu()) {
     if (is_reference_type(type)) {
       __ mem2reg_opt(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()), true);
-      __ verify_oop(dest->as_register());
+      __ verify_oop(dest->as_register(), FILE_AND_LINE);
     } else if (type == T_METADATA || type == T_ADDRESS) {
       __ mem2reg_opt(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()), true);
     } else {
@@ -1033,7 +1033,7 @@ void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool po
   if (src->is_single_cpu()) {
     const Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
     if (is_reference_type(type)) {
-      __ verify_oop(src->as_register());
+      __ verify_oop(src->as_register(), FILE_AND_LINE);
       __ reg2mem_opt(src->as_register(), dst, true);
     } else if (type == T_METADATA || type == T_ADDRESS) {
       __ reg2mem_opt(src->as_register(), dst, true);
@@ -1079,7 +1079,7 @@ void LIR_Assembler::reg2reg(LIR_Opr from_reg, LIR_Opr to_reg) {
     ShouldNotReachHere();
   }
   if (is_reference_type(to_reg->type())) {
-    __ verify_oop(to_reg->as_register());
+    __ verify_oop(to_reg->as_register(), FILE_AND_LINE);
   }
 }
 
@@ -1095,7 +1095,7 @@ void LIR_Assembler::reg2mem(LIR_Opr from, LIR_Opr dest_opr, BasicType type,
   bool needs_patching = (patch_code != lir_patch_none);
 
   if (addr->base()->is_oop_register()) {
-    __ verify_oop(dest);
+    __ verify_oop(dest, FILE_AND_LINE);
   }
 
   PatchingStub* patch = NULL;
@@ -1130,7 +1130,7 @@ void LIR_Assembler::reg2mem(LIR_Opr from, LIR_Opr dest_opr, BasicType type,
   assert(disp_reg != Z_R0 || Immediate::is_simm20(disp_value), "should have set this up");
 
   if (is_reference_type(type)) {
-    __ verify_oop(from->as_register());
+    __ verify_oop(from->as_register(), FILE_AND_LINE);
   }
 
   bool short_disp = Immediate::is_uimm12(disp_value);
@@ -2412,7 +2412,7 @@ void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
                      op->klass()->as_register(),
                      *op->stub()->entry());
   __ bind(*op->stub()->continuation());
-  __ verify_oop(op->obj()->as_register());
+  __ verify_oop(op->obj()->as_register(), FILE_AND_LINE);
 }
 
 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
@@ -2548,7 +2548,7 @@ void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, L
   }
   assert(obj != k_RInfo, "must be different");
 
-  __ verify_oop(obj);
+  __ verify_oop(obj, FILE_AND_LINE);
 
   // Get object class.
   // Not a safepoint as obj null check happens earlier.
@@ -3009,7 +3009,7 @@ void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
   assert(do_null || do_update, "why are we here?");
   assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
 
-  __ verify_oop(obj);
+  __ verify_oop(obj, FILE_AND_LINE);
 
   if (do_null || tmp1 != obj DEBUG_ONLY(|| true)) {
     __ z_ltgr(tmp1, obj);

src/hotspot/cpu/s390/c1_MacroAssembler_s390.cpp

@@ -40,7 +40,7 @@
 
 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
   Label ic_miss, ic_hit;
-  verify_oop(receiver);
+  verify_oop(receiver, FILE_AND_LINE);
   int klass_offset = oopDesc::klass_offset_in_bytes();
 
   if (!ImplicitNullChecks || MacroAssembler::needs_explicit_null_check(klass_offset)) {
@@ -83,7 +83,7 @@ void C1_MacroAssembler::lock_object(Register hdr, Register obj, Register disp_hd
   assert_different_registers(hdr, obj, disp_hdr);
   NearLabel done;
 
-  verify_oop(obj);
+  verify_oop(obj, FILE_AND_LINE);
 
   // Load object header.
   z_lg(hdr, Address(obj, hdr_offset));
@@ -158,7 +158,7 @@ void C1_MacroAssembler::unlock_object(Register hdr, Register obj, Register disp_
     // Load object.
     z_lg(obj, Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()));
   }
-  verify_oop(obj);
+  verify_oop(obj, FILE_AND_LINE);
   // Test if object header is pointing to the displaced header, and if so, restore
   // the displaced header in the object. If the object header is not pointing to
   // the displaced header, get the object header instead.
@@ -278,7 +278,7 @@ void C1_MacroAssembler::initialize_object(
   //    call(RuntimeAddress(Runtime1::entry_for (Runtime1::dtrace_object_alloc_id)));
   //  }
 
-  verify_oop(obj);
+  verify_oop(obj, FILE_AND_LINE);
 }
 
 void C1_MacroAssembler::allocate_array(
@@ -336,16 +336,15 @@ void C1_MacroAssembler::allocate_array(
   //   call(RuntimeAddress(Runtime1::entry_for (Runtime1::dtrace_object_alloc_id)));
   // }
 
-  verify_oop(obj);
+  verify_oop(obj, FILE_AND_LINE);
 }
 
 
 #ifndef PRODUCT
 
 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
-  Unimplemented();
-  // if (!VerifyOops) return;
-  // verify_oop_addr(Address(SP, stack_offset + STACK_BIAS));
+  if (!VerifyOops) return;
+  verify_oop_addr(Address(Z_SP, stack_offset), FILE_AND_LINE);
 }
 
 void C1_MacroAssembler::verify_not_null_oop(Register r) {
@@ -354,7 +353,7 @@ void C1_MacroAssembler::verify_not_null_oop(Register r) {
   compareU64_and_branch(r, (intptr_t)0, bcondNotEqual, not_null);
   stop("non-null oop required");
   bind(not_null);
-  verify_oop(r);
+  verify_oop(r, FILE_AND_LINE);
 }
 
 void C1_MacroAssembler::invalidate_registers(Register preserve1,

src/hotspot/cpu/s390/c1_Runtime1_s390.cpp

@@ -339,7 +339,7 @@ OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers_except_r2(sasm);
 
-        __ verify_oop(obj);
+        __ verify_oop(obj, FILE_AND_LINE);
         __ z_br(Z_R14);
       }
       break;
@@ -405,7 +405,7 @@ OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers_except_r2(sasm);
 
-        __ verify_oop(obj);
+        __ verify_oop(obj, FILE_AND_LINE);
         __ z_br(Z_R14);
       }
       break;
@@ -423,7 +423,7 @@ OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
         restore_live_registers_except_r2(sasm);
 
         // Z_R2,: new multi array
-        __ verify_oop(Z_R2);
+        __ verify_oop(Z_R2, FILE_AND_LINE);
         __ z_br(Z_R14);
       }
       break;

src/hotspot/cpu/s390/gc/g1/g1BarrierSetAssembler_s390.cpp

@@ -400,11 +400,11 @@ void G1BarrierSetAssembler::resolve_jobject(MacroAssembler* masm, Register value
 
   __ z_tmll(tmp1, JNIHandles::weak_tag_mask); // Test for jweak tag.
   __ z_braz(Lnot_weak);
-  __ verify_oop(value);
+  __ verify_oop(value, FILE_AND_LINE);
   DecoratorSet decorators = IN_NATIVE | ON_PHANTOM_OOP_REF;
   g1_write_barrier_pre(masm, decorators, (const Address*)NULL, value, noreg, tmp1, tmp2, true);
   __ bind(Lnot_weak);
-  __ verify_oop(value);
+  __ verify_oop(value, FILE_AND_LINE);
   __ bind(Ldone);
 }
 

src/hotspot/cpu/s390/gc/shared/barrierSetAssembler_s390.cpp

@@ -108,7 +108,7 @@ void BarrierSetAssembler::resolve_jobject(MacroAssembler* masm, Register value,
   __ z_nill(value, ~JNIHandles::weak_tag_mask);
   __ z_lg(value, 0, value); // Resolve (untagged) jobject.
 
-  __ verify_oop(value);
+  __ verify_oop(value, FILE_AND_LINE);
   __ bind(Ldone);
 }
 

src/hotspot/cpu/s390/interp_masm_s390.cpp

@@ -1664,7 +1664,7 @@ void InterpreterMacroAssembler::profile_obj_type(Register obj, Address mdo_addr,
     compareU64_and_branch(obj, (intptr_t)0, Assembler::bcondEqual, null_seen);
   }
 
-  verify_oop(obj);
+  MacroAssembler::verify_oop(obj, FILE_AND_LINE);
   load_klass(klass, obj);
 
   // Klass seen before, nothing to do (regardless of unknown bit).
@@ -2073,7 +2073,7 @@ void InterpreterMacroAssembler::access_local_int(Register index, Register dst) {
 }
 
 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
-  if (state == atos) { MacroAssembler::verify_oop(reg); }
+  if (state == atos) { MacroAssembler::verify_oop(reg, FILE_AND_LINE); }
 }
 
 // Inline assembly for:

src/hotspot/cpu/s390/macroAssembler_s390.cpp

@@ -3587,7 +3587,7 @@ void MacroAssembler::get_vm_result(Register oop_result) {
   z_lg(oop_result, Address(Z_thread, JavaThread::vm_result_offset()));
   clear_mem(Address(Z_thread, JavaThread::vm_result_offset()), sizeof(void*));
 
-  verify_oop(oop_result);
+  verify_oop(oop_result, FILE_AND_LINE);
 }
 
 void MacroAssembler::get_vm_result_2(Register result) {
@@ -6813,26 +6813,94 @@ void MacroAssembler::verify_thread() {
   }
 }
 
+// Save and restore functions: Exclude Z_R0.
+void MacroAssembler::save_volatile_regs(Register dst, int offset, bool include_fp, bool include_flags) {
+  z_stmg(Z_R1, Z_R5, offset, dst); offset += 5 * BytesPerWord;
+  if (include_fp) {
+    z_std(Z_F0, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F1, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F2, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F3, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F4, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F5, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F6, Address(dst, offset)); offset += BytesPerWord;
+    z_std(Z_F7, Address(dst, offset)); offset += BytesPerWord;
+  }
+  if (include_flags) {
+    Label done;
+    z_mvi(Address(dst, offset), 2); // encoding: equal
+    z_bre(done);
+    z_mvi(Address(dst, offset), 4); // encoding: higher
+    z_brh(done);
+    z_mvi(Address(dst, offset), 1); // encoding: lower
+    bind(done);
+  }
+}
+void MacroAssembler::restore_volatile_regs(Register src, int offset, bool include_fp, bool include_flags) {
+  z_lmg(Z_R1, Z_R5, offset, src); offset += 5 * BytesPerWord;
+  if (include_fp) {
+    z_ld(Z_F0, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F1, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F2, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F3, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F4, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F5, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F6, Address(src, offset)); offset += BytesPerWord;
+    z_ld(Z_F7, Address(src, offset)); offset += BytesPerWord;
+  }
+  if (include_flags) {
+    z_cli(Address(src, offset), 2); // see encoding above
+  }
+}
+
 // Plausibility check for oops.
 void MacroAssembler::verify_oop(Register oop, const char* msg) {
   if (!VerifyOops) return;
 
   BLOCK_COMMENT("verify_oop {");
-  Register tmp = Z_R0;
-  unsigned int nbytes_save = 5*BytesPerWord;
-  address entry = StubRoutines::verify_oop_subroutine_entry_address();
+  unsigned int nbytes_save = (5 + 8 + 1) * BytesPerWord;
+  address entry_addr = StubRoutines::verify_oop_subroutine_entry_address();
 
   save_return_pc();
-  push_frame_abi160(nbytes_save);
-  z_stmg(Z_R1, Z_R5, frame::z_abi_160_size, Z_SP);
 
-  z_lgr(Z_ARG2, oop);
-  load_const(Z_ARG1, (address) msg);
-  load_const(Z_R1, entry);
+  // Push frame, but preserve flags
+  z_lgr(Z_R0, Z_SP);
+  z_lay(Z_SP, -((int64_t)nbytes_save + frame::z_abi_160_size), Z_SP);
+  z_stg(Z_R0, _z_abi(callers_sp), Z_SP);
+
+  save_volatile_regs(Z_SP, frame::z_abi_160_size, true, true);
+
+  lgr_if_needed(Z_ARG2, oop);
+  load_const_optimized(Z_ARG1, (address)msg);
+  load_const_optimized(Z_R1, entry_addr);
   z_lg(Z_R1, 0, Z_R1);
   call_c(Z_R1);
 
-  z_lmg(Z_R1, Z_R5, frame::z_abi_160_size, Z_SP);
+  restore_volatile_regs(Z_SP, frame::z_abi_160_size, true, true);
+  pop_frame();
+  restore_return_pc();
+
+  BLOCK_COMMENT("} verify_oop ");
+}
+
+void MacroAssembler::verify_oop_addr(Address addr, const char* msg) {
+  if (!VerifyOops) return;
+
+  BLOCK_COMMENT("verify_oop {");
+  unsigned int nbytes_save = (5 + 8) * BytesPerWord;
+  address entry_addr = StubRoutines::verify_oop_subroutine_entry_address();
+
+  save_return_pc();
+  unsigned int frame_size = push_frame_abi160(nbytes_save); // kills Z_R0
+  save_volatile_regs(Z_SP, frame::z_abi_160_size, true, false);
+
+  z_lg(Z_ARG2, addr.plus_disp(frame_size));
+  load_const_optimized(Z_ARG1, (address)msg);
+  load_const_optimized(Z_R1, entry_addr);
+  z_lg(Z_R1, 0, Z_R1);
+  call_c(Z_R1);
+
+  restore_volatile_regs(Z_SP, frame::z_abi_160_size, true, false);
   pop_frame();
   restore_return_pc();
 

src/hotspot/cpu/s390/macroAssembler_s390.hpp

@@ -973,8 +973,15 @@ class MacroAssembler: public Assembler {
   // Verify Z_thread contents.
   void verify_thread();
 
+  // Save and restore functions: Exclude Z_R0.
+  void save_volatile_regs(   Register dst, int offset, bool include_fp, bool include_flags);
+  void restore_volatile_regs(Register src, int offset, bool include_fp, bool include_flags);
+
   // Only if +VerifyOops.
+  // Kills Z_R0.
   void verify_oop(Register reg, const char* s = "broken oop");
+  // Kills Z_R0, condition code.
+  void verify_oop_addr(Address addr, const char* msg = "contains broken oop");
 
   // TODO: verify_method and klass metadata (compare against vptr?).
   void _verify_method_ptr(Register reg, const char * msg, const char * file, int line) {}

src/hotspot/cpu/s390/methodHandles_s390.cpp

@@ -85,7 +85,7 @@ void MethodHandles::verify_klass(MacroAssembler* _masm,
 
   BLOCK_COMMENT("verify_klass {");
 
-  __ verify_oop(obj_reg);
+  __ verify_oop(obj_reg, FILE_AND_LINE);
   __ compareU64_and_branch(obj_reg, (intptr_t)0L, Assembler::bcondEqual, L_bad);
   __ load_klass(temp_reg, obj_reg);
   // klass_addr is a klass in allstatic SystemDictionaryHandles. Can't get GCed.
@@ -194,22 +194,22 @@ void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
   BLOCK_COMMENT("jump_to_lambda_form {");
 
   // Load the invoker, as MH -> MH.form -> LF.vmentry
-  __ verify_oop(recv);
+  __ verify_oop(recv, FILE_AND_LINE);
   __ load_heap_oop(method_temp,
                    Address(recv,
                            NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())),
                    noreg, noreg, IS_NOT_NULL);
-  __ verify_oop(method_temp);
+  __ verify_oop(method_temp, FILE_AND_LINE);
   __ load_heap_oop(method_temp,
                    Address(method_temp,
                            NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes())),
                    noreg, noreg, IS_NOT_NULL);
-  __ verify_oop(method_temp);
+  __ verify_oop(method_temp, FILE_AND_LINE);
   __ load_heap_oop(method_temp,
                    Address(method_temp,
                            NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())),
                    noreg, noreg, IS_NOT_NULL);
-  __ verify_oop(method_temp);
+  __ verify_oop(method_temp, FILE_AND_LINE);
   __ z_lg(method_temp,
           Address(method_temp,
                   NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())));
@@ -385,7 +385,7 @@ void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
   Register temp1_recv_klass = temp1;
 
   if (iid != vmIntrinsics::_linkToStatic) {
-    __ verify_oop(receiver_reg);
+    __ verify_oop(receiver_reg, FILE_AND_LINE);
     if (iid == vmIntrinsics::_linkToSpecial) {
       // Don't actually load the klass; just null-check the receiver.
       __ null_check(receiver_reg);

src/hotspot/cpu/s390/sharedRuntime_s390.cpp

@@ -892,9 +892,9 @@ static void verify_oop_args(MacroAssembler *masm,
       if (r->is_stack()) {
         __ z_lg(Z_R0_scratch,
                 Address(Z_SP, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize));
-        __ verify_oop(Z_R0_scratch);
+        __ verify_oop(Z_R0_scratch, FILE_AND_LINE);
       } else {
-        __ verify_oop(r->as_Register());
+        __ verify_oop(r->as_Register(), FILE_AND_LINE);
       }
     }
   }
@@ -2686,7 +2686,7 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
       __ z_ltgr(Z_ARG1, Z_ARG1);
       __ z_bre(ic_miss);
     }
-    __ verify_oop(Z_ARG1);
+    __ verify_oop(Z_ARG1, FILE_AND_LINE);
 
     // Check ic: object class <-> cached class
     // Compress cached class for comparison. That's more efficient.
@@ -2955,7 +2955,7 @@ void SharedRuntime::generate_deopt_blob() {
 #ifdef ASSERT
   // verify that there is really an exception oop in JavaThread
   __ z_lg(Z_ARG1, Address(Z_thread, JavaThread::exception_oop_offset()));
-  __ verify_oop(Z_ARG1);
+  __ MacroAssembler::verify_oop(Z_ARG1, FILE_AND_LINE);
 
   // verify that there is no pending exception
   __ asm_assert_mem8_is_zero(in_bytes(Thread::pending_exception_offset()), Z_thread,

src/hotspot/cpu/s390/stubGenerator_s390.cpp

@@ -667,6 +667,17 @@ class StubGenerator: public StubCodeGenerator {
     return start;
   }
 
+#if !defined(PRODUCT)
+  // Wrapper which calls oopDesc::is_oop_or_null()
+  // Only called by MacroAssembler::verify_oop
+  static void verify_oop_helper(const char* message, oopDesc* o) {
+    if (!oopDesc::is_oop_or_null(o)) {
+      fatal("%s. oop: " PTR_FORMAT, message, p2i(o));
+    }
+    ++ StubRoutines::_verify_oop_count;
+  }
+#endif
+
   // Return address of code to be called from code generated by
   // MacroAssembler::verify_oop.
   //
@@ -679,6 +690,11 @@ class StubGenerator: public StubCodeGenerator {
     // StubCodeMark mark(this, "StubRoutines", "verify_oop_stub");
 
     address start = 0;
+
+#if !defined(PRODUCT)
+    start = CAST_FROM_FN_PTR(address, verify_oop_helper);
+#endif
+
     return start;
   }
 

src/hotspot/cpu/x86/sharedRuntime_x86_32.cpp

@@ -30,6 +30,8 @@
 #include "code/nativeInst.hpp"
 #include "code/vtableStubs.hpp"
 #include "gc/shared/gcLocker.hpp"
+#include "gc/shared/barrierSet.hpp"
+#include "gc/shared/barrierSetAssembler.hpp"
 #include "interpreter/interpreter.hpp"
 #include "logging/log.hpp"
 #include "memory/resourceArea.hpp"

src/hotspot/share/code/debugInfo.cpp

@@ -51,7 +51,15 @@ void DebugInfoWriteStream::write_metadata(Metadata* h) {
 }
 
 oop DebugInfoReadStream::read_oop() {
-  oop o = code()->oop_at(read_int());
+  nmethod* nm = const_cast<CompiledMethod*>(code())->as_nmethod_or_null();
+  oop o;
+  if (nm != NULL) {
+    // Despite these oops being found inside nmethods that are on-stack,
+    // they are not kept alive by all GCs (e.g. G1 and Shenandoah).
+    o = nm->oop_at_phantom(read_int());
+  } else {
+    o = code()->oop_at(read_int());
+  }
   assert(oopDesc::is_oop_or_null(o), "oop only");
   return o;
 }

src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2015, 2020, Red Hat, Inc. All rights reserved.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
@@ -226,6 +226,7 @@ private:
   ShenandoahThreadRoots                                     _thread_roots;
   ShenandoahCodeCacheRoots<ITR>                             _code_roots;
   ShenandoahVMRoots<false /*concurrent*/ >                  _vm_roots;
+  ShenandoahStringDedupRoots                                _dedup_roots;
   ShenandoahClassLoaderDataRoots<false /*concurrent*/, false /*single threaded*/>
                                                             _cld_roots;
 public:

src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2019, 2020, Red Hat, Inc. All rights reserved.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
@@ -250,6 +250,9 @@ void ShenandoahRootScanner<ITR>::roots_do(uint worker_id, OopClosure* oops, CLDC
   if (code != NULL && !ShenandoahConcurrentScanCodeRoots) {
     _code_roots.code_blobs_do(code, worker_id);
   }
+
+  AlwaysTrueClosure always_true;
+  _dedup_roots.oops_do(&always_true, oops, worker_id);
 }
 
 template <typename ITR>

src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2018, 2020, Red Hat, Inc. All rights reserved.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
@@ -193,9 +193,6 @@ public:
       } else {
         _rp->roots_do(worker_id, &roots_cl, &cld_cl, &code_cl);
       }
-
-      AlwaysTrueClosure is_alive;
-      _dedup_roots.oops_do(&is_alive, &roots_cl, worker_id);
     }
   }
 };

src/hotspot/share/jfr/metadata/metadata.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 
 <!--
- Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
+ Copyright (c) 2012, 2020, 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
@@ -1023,36 +1023,6 @@
     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
   </Event>
 
-  <Event name="FlushStorage" category="Flight Recorder" label="Flush Storage" thread="false" experimental="true">
-    <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
-    <Field type="ulong" name="elements" label="Elements Written" />
-    <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
-  </Event>
-
-  <Event name="FlushStacktrace" category="Flight Recorder" label="Flush Stacktrace" thread="false" experimental="true">
-    <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
-    <Field type="ulong" name="elements" label="Elements Written" />
-    <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
-  </Event>
-
-  <Event name="FlushStringPool" category="Flight Recorder" label="Flush String Pool" thread="false" experimental="true">
-    <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
-    <Field type="ulong" name="elements" label="Elements Written" />
-    <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
-  </Event>
-
-  <Event name="FlushMetadata" category="Flight Recorder" label="Flush Metadata" thread="false" experimental="true">
-    <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
-    <Field type="ulong" name="elements" label="Elements Written" />
-    <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
-  </Event>
-
-  <Event name="FlushTypeSet" category="Flight Recorder" label="Flush Type Set" thread="false" experimental="true">
-    <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
-    <Field type="ulong" name="elements" label="Elements Written" />
-    <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
-  </Event>
-
   <Type name="DeoptimizationReason" label="Deoptimization Reason">
     <Field type="string" name="reason" label="Reason" />
   </Type>

src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp

@@ -58,13 +58,12 @@
 // incremented on each flushpoint
 static u8 flushpoint_id = 0;
 
-template <typename E, typename Instance, size_t(Instance::*func)()>
+template <typename Instance, size_t(Instance::*func)()>
 class Content {
  private:
   Instance& _instance;
   u4 _elements;
  public:
-  typedef E EventType;
   Content(Instance& instance) : _instance(instance), _elements(0) {}
   bool process() {
     _elements = (u4)(_instance.*func)();
@@ -82,7 +81,6 @@ class WriteContent : public StackObj {
   Content& _content;
   const int64_t _start_offset;
  public:
-  typedef typename Content::EventType EventType;
 
   WriteContent(JfrChunkWriter& cw, Content& content) :
     _start_time(JfrTicks::now()),
@@ -128,14 +126,6 @@ class WriteContent : public StackObj {
     return (u4)(end_offset() - start_offset());
   }
 
-  static bool is_event_enabled() {
-    return EventType::is_enabled();
-  }
-
-  static u8 event_id() {
-    return EventType::eventId;
-  }
-
   void write_elements(int64_t offset) {
     _cw.write_padded_at_offset<u4>(elements(), offset);
   }
@@ -199,22 +189,15 @@ static u4 invoke(Functor& f) {
 }
 
 template <typename Functor>
-static void write_flush_event(Functor& f) {
-  if (Functor::is_event_enabled()) {
-    typename Functor::EventType e(UNTIMED);
+static u4 invoke_with_flush_event(Functor& f) {
+  const u4 elements = invoke(f);
+  EventFlush e(UNTIMED);
   e.set_starttime(f.start_time());
   e.set_endtime(f.end_time());
   e.set_flushId(flushpoint_id);
   e.set_elements(f.elements());
   e.set_size(f.size());
   e.commit();
-  }
-}
-
-template <typename Functor>
-static u4 invoke_with_flush_event(Functor& f) {
-  const u4 elements = invoke(f);
-  write_flush_event(f);
   return elements;
 }
 
@@ -226,7 +209,6 @@ class StackTraceRepository : public StackObj {
   bool _clear;
 
  public:
-  typedef EventFlushStacktrace EventType;
   StackTraceRepository(JfrStackTraceRepository& repo, JfrChunkWriter& cw, bool clear) :
     _repo(repo), _cw(cw), _elements(0), _clear(clear) {}
   bool process() {
@@ -242,7 +224,7 @@ typedef WriteCheckpointEvent<StackTraceRepository> WriteStackTrace;
 static u4 flush_stacktrace(JfrStackTraceRepository& stack_trace_repo, JfrChunkWriter& chunkwriter) {
   StackTraceRepository str(stack_trace_repo, chunkwriter, false);
   WriteStackTrace wst(chunkwriter, str, TYPE_STACKTRACE);
-  return invoke_with_flush_event(wst);
+  return invoke(wst);
 }
 
 static u4 write_stacktrace(JfrStackTraceRepository& stack_trace_repo, JfrChunkWriter& chunkwriter, bool clear) {
@@ -251,14 +233,14 @@ static u4 write_stacktrace(JfrStackTraceRepository& stack_trace_repo, JfrChunkWr
   return invoke(wst);
 }
 
-typedef Content<EventFlushStorage, JfrStorage, &JfrStorage::write> Storage;
+typedef Content<JfrStorage, &JfrStorage::write> Storage;
 typedef WriteContent<Storage> WriteStorage;
 
 static size_t flush_storage(JfrStorage& storage, JfrChunkWriter& chunkwriter) {
   assert(chunkwriter.is_valid(), "invariant");
   Storage fsf(storage);
   WriteStorage fs(chunkwriter, fsf);
-  return invoke_with_flush_event(fs);
+  return invoke(fs);
 }
 
 static size_t write_storage(JfrStorage& storage, JfrChunkWriter& chunkwriter) {
@@ -268,15 +250,15 @@ static size_t write_storage(JfrStorage& storage, JfrChunkWriter& chunkwriter) {
   return invoke(fs);
 }
 
-typedef Content<EventFlushStringPool, JfrStringPool, &JfrStringPool::write> StringPool;
-typedef Content<EventFlushStringPool, JfrStringPool, &JfrStringPool::write_at_safepoint> StringPoolSafepoint;
+typedef Content<JfrStringPool, &JfrStringPool::write> StringPool;
+typedef Content<JfrStringPool, &JfrStringPool::write_at_safepoint> StringPoolSafepoint;
 typedef WriteCheckpointEvent<StringPool> WriteStringPool;
 typedef WriteCheckpointEvent<StringPoolSafepoint> WriteStringPoolSafepoint;
 
 static u4 flush_stringpool(JfrStringPool& string_pool, JfrChunkWriter& chunkwriter) {
   StringPool sp(string_pool);
   WriteStringPool wsp(chunkwriter, sp, TYPE_STRING);
-  return invoke_with_flush_event(wsp);
+  return invoke(wsp);
 }
 
 static u4 write_stringpool(JfrStringPool& string_pool, JfrChunkWriter& chunkwriter) {
@@ -291,20 +273,19 @@ static u4 write_stringpool_safepoint(JfrStringPool& string_pool, JfrChunkWriter&
   return invoke(wsps);
 }
 
-typedef Content<EventFlushTypeSet, JfrCheckpointManager, &JfrCheckpointManager::flush_type_set> FlushTypeSetFunctor;
+typedef Content<JfrCheckpointManager, &JfrCheckpointManager::flush_type_set> FlushTypeSetFunctor;
 typedef WriteContent<FlushTypeSetFunctor> FlushTypeSet;
 
 static u4 flush_typeset(JfrCheckpointManager& checkpoint_manager, JfrChunkWriter& chunkwriter) {
   FlushTypeSetFunctor flush_type_set(checkpoint_manager);
   FlushTypeSet fts(chunkwriter, flush_type_set);
-  return invoke_with_flush_event(fts);
+  return invoke(fts);
 }
 
 class MetadataEvent : public StackObj {
  private:
   JfrChunkWriter& _cw;
  public:
-  typedef EventFlushMetadata EventType;
   MetadataEvent(JfrChunkWriter& cw) : _cw(cw) {}
   bool process() {
     JfrMetadataEvent::write(_cw);
@@ -319,7 +300,7 @@ static u4 flush_metadata(JfrChunkWriter& chunkwriter) {
   assert(chunkwriter.is_valid(), "invariant");
   MetadataEvent me(chunkwriter);
   WriteMetadata wm(chunkwriter, me);
-  return invoke_with_flush_event(wm);
+  return invoke(wm);
 }
 
 static u4 write_metadata(JfrChunkWriter& chunkwriter) {
@@ -651,7 +632,7 @@ size_t JfrRecorderService::flush() {
   return total_elements;
 }
 
-typedef Content<EventFlush, JfrRecorderService, &JfrRecorderService::flush> FlushFunctor;
+typedef Content<JfrRecorderService, &JfrRecorderService::flush> FlushFunctor;
 typedef WriteContent<FlushFunctor> Flush;
 
 void JfrRecorderService::invoke_flush() {

src/hotspot/share/opto/parse2.cpp

@@ -1048,11 +1048,11 @@ void Parse::jump_switch_ranges(Node* key_val, SwitchRange *lo, SwitchRange *hi,
       // if there is a higher range, test for it and process it:
       if (mid < hi && !eq_test_only) {
         // two comparisons of same values--should enable 1 test for 2 branches
-        // Use BoolTest::le instead of BoolTest::gt
+        // Use BoolTest::lt instead of BoolTest::gt
         float cnt = sum_of_cnts(lo, mid-1);
-        IfNode *iff_le  = jump_if_fork_int(key_val, test_val, BoolTest::le, if_prob(cnt, total_cnt), if_cnt(cnt));
-        Node   *iftrue  = _gvn.transform( new IfTrueNode(iff_le) );
-        Node   *iffalse = _gvn.transform( new IfFalseNode(iff_le) );
+        IfNode *iff_lt  = jump_if_fork_int(key_val, test_val, BoolTest::lt, if_prob(cnt, total_cnt), if_cnt(cnt));
+        Node   *iftrue  = _gvn.transform( new IfTrueNode(iff_lt) );
+        Node   *iffalse = _gvn.transform( new IfFalseNode(iff_lt) );
         { PreserveJVMState pjvms(this);
           set_control(iffalse);
           jump_switch_ranges(key_val, mid+1, hi, switch_depth+1);

src/hotspot/share/utilities/count_leading_zeros.hpp

@@ -108,8 +108,8 @@ template <typename T> struct CountLeadingZerosImpl<T, 4> {
 
 template <typename T> struct CountLeadingZerosImpl<T, 8> {
   static unsigned doit(T v) {
-    unsigned long index;
 #ifdef _LP64
+    unsigned long index;
     _BitScanReverse64(&index, v);
     return 63u - index;
 #else

src/java.base/share/classes/java/lang/Class.java

@@ -89,16 +89,15 @@ import sun.reflect.annotation.*;
 import sun.reflect.misc.ReflectUtil;
 
 /**
- * Instances of the class {@code Class} represent classes and interfaces
- * in a running Java application. An enum type is a kind of class and an
- * annotation type is a kind of interface. Every array also
- * belongs to a class that is reflected as a {@code Class} object
- * that is shared by all arrays with the same element type and number
- * of dimensions.  The primitive Java types ({@code boolean},
- * {@code byte}, {@code char}, {@code short},
- * {@code int}, {@code long}, {@code float}, and
- * {@code double}), and the keyword {@code void} are also
- * represented as {@code Class} objects.
+ * Instances of the class {@code Class} represent classes and
+ * interfaces in a running Java application. An enum type and a record
+ * type are kinds of class; an annotation type is a kind of
+ * interface. Every array also belongs to a class that is reflected as
+ * a {@code Class} object that is shared by all arrays with the same
+ * element type and number of dimensions.  The primitive Java types
+ * ({@code boolean}, {@code byte}, {@code char}, {@code short}, {@code
+ * int}, {@code long}, {@code float}, and {@code double}), and the
+ * keyword {@code void} are also represented as {@code Class} objects.
  *
  * <p> {@code Class} has no public constructor. Instead a {@code Class}
  * object is constructed automatically by the Java Virtual Machine

src/java.base/share/classes/java/lang/annotation/ElementType.java

@@ -71,7 +71,8 @@ package java.lang.annotation;
  * @jls 4.1 The Kinds of Types and Values
  */
 public enum ElementType {
-    /** Class, interface (including annotation type), or enum declaration */
+    /** Class, interface (including annotation type), enum, or record
+     * declaration */
     TYPE,
 
     /** Field declaration (includes enum constants) */

src/java.base/share/classes/java/lang/invoke/MethodHandles.java

@@ -1451,7 +1451,7 @@ public class MethodHandles {
          * <li>If the new lookup class is in the same module as the old lookup class,
          * the new previous lookup class is the old previous lookup class.
          * <li>If the new lookup class is in a different module from the old lookup class,
-         * the new previous lookup class is the the old lookup class.
+         * the new previous lookup class is the old lookup class.
          *</ul>
          * <p>
          * The resulting lookup's capabilities for loading classes

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Flow.java

@@ -2579,7 +2579,7 @@ public class Flow {
                 recordExit(exit);
                 return ;
             } else {
-                scan(tree.value);
+                scanExpr(tree.value);
                 recordExit(new AssignPendingExit(tree, inits, uninits));
             }
         }

src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2020, 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
@@ -3746,7 +3746,7 @@ public class JavacParser implements Parser {
                     ListBuffer<JCVariableDecl> tmpParams = new ListBuffer<>();
                     for (JCVariableDecl param : headerFields) {
                         tmpParams.add(F.at(param)
-                                .VarDef(F.Modifiers(Flags.PARAMETER | param.mods.flags & Flags.VARARGS | param.mods.flags & Flags.FINAL),
+                                .VarDef(F.Modifiers(Flags.PARAMETER | param.mods.flags & Flags.VARARGS),
                                 param.name, param.vartype, null));
                     }
                     methDef.params = tmpParams.toList();

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ClassFileReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2020, 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
@@ -58,13 +58,6 @@ import java.util.zip.ZipFile;
  * a .class file, a directory, or a JAR file.
  */
 public class ClassFileReader implements Closeable {
-    /**
-     * Returns a ClassFileReader instance of a given path.
-     */
-    public static ClassFileReader newInstance(Path path) throws IOException {
-        return newInstance(path, null);
-    }
-
     /**
      * Returns a ClassFileReader instance of a given path.
      */

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/JdepsTask.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2020, 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
@@ -915,6 +915,11 @@ class JdepsTask {
                             option);
                 return false;
             }
+            if (!options.rootModules.isEmpty()) {
+                reportError("err.invalid.options", "-m or --module",
+                            option);
+                return false;
+            }
             return true;
         }
 
@@ -922,7 +927,7 @@ class JdepsTask {
         boolean run(JdepsConfiguration config) throws IOException {
             // check if any JAR file contains unnamed package
             for (String arg : inputArgs) {
-                try (ClassFileReader reader = ClassFileReader.newInstance(Paths.get(arg))) {
+                try (ClassFileReader reader = ClassFileReader.newInstance(Paths.get(arg), config.getVersion())) {
                     Optional<String> classInUnnamedPackage =
                         reader.entries().stream()
                               .filter(n -> n.endsWith(".class"))
@@ -942,10 +947,10 @@ class JdepsTask {
 
             ModuleInfoBuilder builder
                  = new ModuleInfoBuilder(config, inputArgs, dir, openModule);
-            boolean ok = builder.run();
-
-            if (!ok && !options.nowarning) {
+            boolean ok = builder.run(options.ignoreMissingDeps, log, options.nowarning);
+            if (!ok) {
                 reportError("err.missing.dependences");
+                log.println();
                 builder.visitMissingDeps(new SimpleDepVisitor());
             }
             return ok;
@@ -981,7 +986,7 @@ class JdepsTask {
                 throw new UncheckedBadArgs(new BadArgs("err.invalid.options",
                                                        list, "--check"));
             }
-            return new ModuleAnalyzer(config, log, modules).run();
+            return new ModuleAnalyzer(config, log, modules).run(options.ignoreMissingDeps);
         }
 
         /*
@@ -1041,7 +1046,7 @@ class JdepsTask {
                                                                        separator);
             boolean ok = analyzer.run(options.depth(), options.ignoreMissingDeps);
             if (!ok) {
-                reportError("err.cant.list.module.deps");
+                reportError("err.missing.dependences");
                 log.println();
                 analyzer.visitMissingDeps(new SimpleDepVisitor());
             }

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleAnalyzer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -24,22 +24,16 @@
  */
 package com.sun.tools.jdeps;
 
-import static com.sun.tools.jdeps.Graph.*;
 import static com.sun.tools.jdeps.JdepsFilter.DEFAULT_FILTER;
 import static com.sun.tools.jdeps.Module.*;
 import static java.lang.module.ModuleDescriptor.Requires.Modifier.*;
 import static java.util.stream.Collectors.*;
 
 import com.sun.tools.classfile.Dependency;
-import com.sun.tools.jdeps.JdepsTask.BadArgs;
 
 import java.io.IOException;
-import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.lang.module.ModuleDescriptor;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -80,23 +74,32 @@ public class ModuleAnalyzer {
         }
     }
 
-    public boolean run() throws IOException {
+    public boolean run(boolean ignoreMissingDeps) throws IOException {
         try {
+            for (ModuleDeps md: modules.values()) {
                 // compute "requires transitive" dependences
-            modules.values().forEach(ModuleDeps::computeRequiresTransitive);
-
-            modules.values().forEach(md -> {
+                md.computeRequiresTransitive(ignoreMissingDeps);
                 // compute "requires" dependences
-                md.computeRequires();
+                md.computeRequires(ignoreMissingDeps);
+                // print module descriptor
+                md.printModuleDescriptor();
+
                 // apply transitive reduction and reports recommended requires.
-                md.analyzeDeps();
-            });
+                boolean ok = md.analyzeDeps();
+                if (!ok) return false;
+
+                if (ignoreMissingDeps && md.hasMissingDependencies()) {
+                    log.format("Warning: --ignore-missing-deps specified. Missing dependencies from %s are ignored%n",
+                               md.root.name());
+                }
+            }
         } finally {
             dependencyFinder.shutdown();
         }
         return true;
     }
 
+
     class ModuleDeps {
         final Module root;
         Set<Module> requiresTransitive;
@@ -110,23 +113,22 @@ public class ModuleAnalyzer {
         /**
          * Compute 'requires transitive' dependences by analyzing API dependencies
          */
-        private void computeRequiresTransitive() {
+        private void computeRequiresTransitive(boolean ignoreMissingDeps) {
             // record requires transitive
-            this.requiresTransitive = computeRequires(true)
+            this.requiresTransitive = computeRequires(true, ignoreMissingDeps)
                 .filter(m -> !m.name().equals(JAVA_BASE))
                 .collect(toSet());
 
             trace("requires transitive: %s%n", requiresTransitive);
         }
 
-        private void computeRequires() {
-            this.requires = computeRequires(false).collect(toSet());
+        private void computeRequires(boolean ignoreMissingDeps) {
+            this.requires = computeRequires(false, ignoreMissingDeps).collect(toSet());
             trace("requires: %s%n", requires);
         }
 
-        private Stream<Module> computeRequires(boolean apionly) {
+        private Stream<Module> computeRequires(boolean apionly, boolean ignoreMissingDeps) {
             // analyze all classes
-
             if (apionly) {
                 dependencyFinder.parseExportedAPIs(Stream.of(root));
             } else {
@@ -135,9 +137,14 @@ public class ModuleAnalyzer {
 
             // find the modules of all the dependencies found
             return dependencyFinder.getDependences(root)
+                        .filter(a -> !(ignoreMissingDeps && Analyzer.notFound(a)))
                         .map(Archive::getModule);
         }
 
+        boolean hasMissingDependencies() {
+            return dependencyFinder.getDependences(root).anyMatch(Analyzer::notFound);
+        }
+
         ModuleDescriptor descriptor() {
             return descriptor(requiresTransitive, requires);
         }
@@ -196,12 +203,30 @@ public class ModuleAnalyzer {
             return descriptor(requiresTransitive, g.adjacentNodes(root));
         }
 
+        private void showMissingDeps() {
+            // build the analyzer if there are missing dependences
+            Analyzer analyzer = new Analyzer(configuration, Analyzer.Type.CLASS, DEFAULT_FILTER);
+            analyzer.run(Set.of(root), dependencyFinder.locationToArchive());
+            log.println("Error: Missing dependencies: classes not found from the module path.");
+            Analyzer.Visitor visitor = new Analyzer.Visitor() {
+                @Override
+                public void visitDependence(String origin, Archive originArchive, String target, Archive targetArchive) {
+                    log.format("   %-50s -> %-50s %s%n", origin, target, targetArchive.getName());
+                }
+            };
+            analyzer.visitDependences(root, visitor, Analyzer.Type.VERBOSE, Analyzer::notFound);
+            log.println();
+        }
+
         /**
          * Apply transitive reduction on the resulting graph and reports
          * recommended requires.
          */
-        private void analyzeDeps() {
-            printModuleDescriptor(log, root);
+        private boolean analyzeDeps() {
+            if (requires.stream().anyMatch(m -> m == UNNAMED_MODULE)) {
+                showMissingDeps();
+                return false;
+            }
 
             ModuleDescriptor analyzedDescriptor = descriptor();
             if (!matches(root.descriptor(), analyzedDescriptor)) {
@@ -223,6 +248,7 @@ public class ModuleAnalyzer {
 
             checkQualifiedExports();
             log.println();
+            return true;
         }
 
         private void checkQualifiedExports() {
@@ -239,6 +265,10 @@ public class ModuleAnalyzer {
                         .collect(joining(","))));
         }
 
+        void printModuleDescriptor() {
+            printModuleDescriptor(log, root);
+        }
+
         private void printModuleDescriptor(PrintWriter out, Module module) {
             ModuleDescriptor descriptor = module.descriptor();
             out.format("%s (%s)%n", descriptor.name(), module.location());

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleInfoBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2020, 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
@@ -98,7 +98,7 @@ public class ModuleInfoBuilder {
         }
     }
 
-    public boolean run() throws IOException {
+    public boolean run(boolean ignoreMissingDeps, PrintWriter log, boolean quiet) throws IOException {
         try {
             // pass 1: find API dependencies
             Map<Archive, Set<Archive>> requiresTransitive = computeRequiresTransitive();
@@ -108,52 +108,65 @@ public class ModuleInfoBuilder {
 
             analyzer.run(automaticModules(), dependencyFinder.locationToArchive());
 
-            boolean missingDeps = false;
             for (Module m : automaticModules()) {
                 Set<Archive> apiDeps = requiresTransitive.containsKey(m)
                                             ? requiresTransitive.get(m)
                                             : Collections.emptySet();
 
-                Path file = outputdir.resolve(m.name()).resolve("module-info.java");
+                // if this is a multi-release JAR, write to versions/$VERSION/module-info.java
+                Runtime.Version version = configuration.getVersion();
+                Path dir = version != null
+                            ? outputdir.resolve(m.name())
+                                       .resolve("versions")
+                                       .resolve(String.valueOf(version.feature()))
+                            : outputdir.resolve(m.name());
+                Path file = dir.resolve("module-info.java");
 
                 // computes requires and requires transitive
-                Module normalModule = toNormalModule(m, apiDeps);
+                Module normalModule = toNormalModule(m, apiDeps, ignoreMissingDeps);
                 if (normalModule != null) {
                     automaticToNormalModule.put(m, normalModule);
 
                     // generate module-info.java
-                    System.out.format("writing to %s%n", file);
+                    if (!quiet) {
+                        if (ignoreMissingDeps && analyzer.requires(m).anyMatch(Analyzer::notFound)) {
+                            log.format("Warning: --ignore-missing-deps specified. Missing dependencies from %s are ignored%n",
+                                       m.name());
+                        }
+                        log.format("writing to %s%n", file);
+                    }
                     writeModuleInfo(file,  normalModule.descriptor());
                 } else {
                     // find missing dependences
-                    System.out.format("Missing dependence: %s not generated%n", file);
-                    missingDeps = true;
+                    return false;
                 }
             }
 
-            return !missingDeps;
         } finally {
             dependencyFinder.shutdown();
         }
+        return true;
     }
 
-    private Module toNormalModule(Module module, Set<Archive> requiresTransitive)
+    private Module toNormalModule(Module module, Set<Archive> requiresTransitive, boolean ignoreMissingDeps)
         throws IOException
     {
         // done analysis
         module.close();
 
-        if (analyzer.requires(module).anyMatch(Analyzer::notFound)) {
+        if (!ignoreMissingDeps && analyzer.requires(module).anyMatch(Analyzer::notFound)) {
             // missing dependencies
             return null;
         }
 
         Map<String, Boolean> requires = new HashMap<>();
         requiresTransitive.stream()
+            .filter(a -> !(ignoreMissingDeps && Analyzer.notFound(a)))
             .map(Archive::getModule)
             .forEach(m -> requires.put(m.name(), Boolean.TRUE));
 
         analyzer.requires(module)
+            .filter(a -> !(ignoreMissingDeps && Analyzer.notFound(a)))
             .map(Archive::getModule)
             .forEach(d -> requires.putIfAbsent(d.name(), Boolean.FALSE));
 

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/resources/jdeps.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2020, 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
@@ -229,7 +229,6 @@ main.opt.multi-release=\
 err.command.set={0} and {1} options are specified.
 err.unknown.option=unknown option: {0}
 err.missing.arg=no value given for {0}
-err.missing.dependences=missing dependencies
 err.invalid.arg.for.option=invalid argument for option: {0}
 err.option.after.class=option must be specified before classes: {0}
 err.genmoduleinfo.not.jarfile={0} is a modular JAR file that cannot be specified with the --generate-module-info option
@@ -246,8 +245,8 @@ err.multirelease.option.exists={0} is not a multi-release jar file but --multi-r
 err.multirelease.option.notfound={0} is a multi-release jar file but --multi-release option is not set
 err.multirelease.version.associated=class {0} already associated with version {1}, trying to add version {2}
 err.multirelease.jar.malformed=malformed multi-release jar, {0}, bad entry: {1}
-err.cant.list.module.deps=\
-Missing dependencies from the module path and classpath.\n\
+err.missing.dependences=\
+Missing dependencies: classes not found from the module path and classpath.\n\
 To suppress this error, use --ignore-missing-deps to continue.
 
 warn.invalid.arg=Path does not exist: {0}

src/jdk.jfr/share/conf/jfr/default.jfc

@@ -671,32 +671,7 @@
     </event>
 
     <event name="jdk.Flush">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStorage">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStacktrace">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStringPool">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushMetadata">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushTypeSet">
-      <setting name="enabled">true</setting>
+      <setting name="enabled">false</setting>
       <setting name="threshold">0 ns</setting>
     </event>
 

src/jdk.jfr/share/conf/jfr/profile.jfc

@@ -671,32 +671,7 @@
     </event>
 
     <event name="jdk.Flush">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStorage">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStacktrace">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushStringPool">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushMetadata">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ns</setting>
-    </event>
-
-    <event name="jdk.FlushTypeSet">
-      <setting name="enabled">true</setting>
+      <setting name="enabled">false</setting>
       <setting name="threshold">0 ns</setting>
     </event>
 

src/jdk.jshell/share/classes/jdk/internal/jshell/tool/Feedback.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -596,6 +596,7 @@ class Feedback {
         INTERFACE("interface declaration"),
         ENUM("enum declaration"),
         ANNOTATION("annotation interface declaration"),
+        RECORD("record declaration"),
         METHOD("method declaration -- note: {type}==parameter-types"),
         VARDECL("variable declaration without init"),
         VARINIT("variable declaration with init"),

src/jdk.jshell/share/classes/jdk/internal/jshell/tool/JShellTool.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2020, 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
@@ -3324,6 +3324,9 @@ public class JShellTool implements MessageHandler {
                 case ANNOTATION_TYPE_SUBKIND:
                     kind = "@interface";
                     break;
+                case RECORD_SUBKIND:
+                    kind = "record";
+                    break;
                 default:
                     assert false : "Wrong kind" + ck.subKind();
                     kind = "class";
@@ -3819,6 +3822,9 @@ public class JShellTool implements MessageHandler {
                 case ANNOTATION_TYPE_SUBKIND:
                     custom(FormatCase.ANNOTATION, ((TypeDeclSnippet) sn).name());
                     break;
+                case RECORD_SUBKIND:
+                    custom(FormatCase.RECORD, ((TypeDeclSnippet) sn).name());
+                    break;
                 case METHOD_SUBKIND:
                     custom(FormatCase.METHOD, ((MethodSnippet) sn).name(), ((MethodSnippet) sn).parameterTypes());
                     break;

src/jdk.jshell/share/classes/jdk/internal/jshell/tool/resources/l10n.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2020, 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
@@ -855,6 +855,7 @@ The case selector kind describes the kind of snippet.  The values are:\n\t\
    interface  -- interface declaration\n\t\
    enum       -- enum declaration\n\t\
    annotation -- annotation interface declaration\n\t\
+   record     -- record declaration\n\t\
    method     -- method declaration -- note: {type}==parameter-types\n\t\
    vardecl    -- variable declaration without init\n\t\
    varinit    -- variable declaration with init\n\t\
@@ -1158,12 +1159,12 @@ startup.feedback = \
 /set format verbose action '  update overwrote' overwrote-update    \n\
 /set format verbose action '  update dropped' dropped-update    \n\
 \n\
-/set format verbose until ', however, it cannot be instantiated or its methods invoked until'   defined-class-primary    \n\
+/set format verbose until ', however, it cannot be instantiated or its methods invoked until'   defined-class,record-primary    \n\
 /set format verbose until ', however, its methods cannot be invoked until'                      defined-interface-primary    \n\
 /set format verbose until ', however, it cannot be used until'                                  defined-enum,annotation-primary    \n\
 /set format verbose until ', however, it cannot be invoked until'                               defined-method-primary    \n\
 /set format verbose until ', however, it cannot be referenced until'                            notdefined-primary    \n\
-/set format verbose until ' which cannot be instantiated or its methods invoked until'          defined-class-update    \n\
+/set format verbose until ' which cannot be instantiated or its methods invoked until'          defined-class,record-update    \n\
 /set format verbose until ' whose methods cannot be invoked until'                              defined-interface-update    \n\
 /set format verbose until ' which cannot be invoked until'                                      defined-method-update    \n\
 /set format verbose until ' which cannot be referenced until'                                   notdefined-update    \n\
@@ -1183,6 +1184,7 @@ startup.feedback = \
 /set format verbose typeKind 'interface'              interface    \n\
 /set format verbose typeKind 'enum'                   enum    \n\
 /set format verbose typeKind 'annotation interface'   annotation    \n\
+/set format verbose typeKind 'record'                 record    \n\
 \n\
 /set format verbose result '{name} ==> {value}{post}'                                        added,modified,replaced-ok-primary    \n\
 \n\
@@ -1194,10 +1196,10 @@ startup.feedback = \
 /set format verbose display '{pre}{action} variable {name}{post}'                            dropped-vardecl,varinit,expression    \n\
 /set format verbose display '{pre}{action} variable {name}, reset to null{post}'             replaced-vardecl,varinit-ok-update    \n\
 \n\
-/set format verbose display '{pre}{action} {typeKind} {name}{resolve}{post}'                 class,interface,enum,annotation    \n\
+/set format verbose display '{pre}{action} {typeKind} {name}{resolve}{post}'                 class,interface,enum,annotation,record    \n\
 /set format verbose display '{pre}{action} method {name}({type}){resolve}{post}'             method    \n\
 \n\
-/set format verbose display '{pre}attempted to use {typeKind} {name}{resolve}{post}'         used-class,interface,enum,annotation    \n\
+/set format verbose display '{pre}attempted to use {typeKind} {name}{resolve}{post}'         used-class,interface,enum,annotation,record    \n\
 /set format verbose display '{pre}attempted to call method {name}({type}){resolve}{post}'    used-method    \n\
 \n\
 /set truncation verbose 80\n\
@@ -1211,7 +1213,7 @@ startup.feedback = \
 \n\
 /set prompt concise 'jshell> '   '   ...> '    \n\
 \n\
-/set format concise display ''                                                              class,interface,enum,annotation,method,assignment,varinit,vardecl-ok    \n\
+/set format concise display ''                                                              class,interface,enum,annotation,record,method,assignment,varinit,vardecl-ok    \n\
 \n\
 /set feedback normal    \n\
 \n\

src/jdk.jshell/share/classes/jdk/jshell/Corraller.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -42,6 +42,10 @@ import static com.sun.tools.javac.code.Flags.PUBLIC;
 import static com.sun.tools.javac.code.Flags.STATIC;
 import static com.sun.tools.javac.code.Flags.INTERFACE;
 import static com.sun.tools.javac.code.Flags.ENUM;
+import static com.sun.tools.javac.code.Flags.RECORD;
+import static com.sun.tools.javac.code.Flags.SYNTHETIC;
+import com.sun.tools.javac.tree.JCTree.Tag;
+import com.sun.tools.javac.tree.TreeInfo;
 import jdk.jshell.Wrap.CompoundWrap;
 import jdk.jshell.Wrap.Range;
 import jdk.jshell.Wrap.RangeWrap;
@@ -114,6 +118,7 @@ class Corraller extends Visitor {
     public void visitClassDef(JCClassDecl tree) {
         boolean isEnum = (tree.mods.flags & ENUM) != 0;
         boolean isInterface = (tree.mods.flags & INTERFACE ) != 0;
+        boolean isRecord = (tree.mods.flags & RECORD ) != 0;
         int classBegin = dis.getStartPosition(tree);
         int classEnd = dis.getEndPosition(tree);
         //debugWrap("visitClassDef: %d-%d = %s\n", classBegin, classEnd, source.substring(classBegin, classEnd));
@@ -151,8 +156,12 @@ class Corraller extends Visitor {
                 // non-enum
                 boolean constructorSeen = false;
                 for (List<? extends JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) {
-                    wrappedDefs.append("\n   ");
                     JCTree t = l.head;
+                    if (isRecord && t.hasTag(Tag.VARDEF) && (TreeInfo.flags(t) & RECORD) != 0) {
+                        //record parameters are part of the record's header
+                        continue;
+                    }
+                    wrappedDefs.append("\n   ");
                     switch (t.getKind()) {
                         case METHOD:
                             constructorSeen = constructorSeen || ((MethodTree)t).getName() == tree.name.table.names.init;
@@ -166,7 +175,14 @@ class Corraller extends Visitor {
                     }
                     wrappedDefs.append(corral(t));
                 }
-                if (!constructorSeen && !isInterface && !isEnum) {
+                if (!constructorSeen && isRecord) {
+                    // Generate a default constructor, since
+                    // this is a regular record and there are no constructors
+                    if (wrappedDefs.length() > 0) {
+                        wrappedDefs.append("\n ");
+                    }
+                    wrappedDefs.append("  public " + tree.name.toString() + " " + resolutionExceptionBlock);
+                } else if (!constructorSeen && !isInterface && !isEnum) {
                     // Generate a default constructor, since
                     // this is a regular class and there are no constructors
                     if (wrappedDefs.length() > 0) {
@@ -175,8 +191,10 @@ class Corraller extends Visitor {
                     wrappedDefs.append(defaultConstructor(tree));
                 }
             }
+            if (!isRecord) {
                 bodyBegin = dis.getStartPosition(tree.defs.head);
             }
+        }
         Object defs = wrappedDefs.length() == 1
             ? wrappedDefs.first()
             : new CompoundWrap(wrappedDefs.toArray());

test/hotspot/jtreg/compiler/c2/TestJumpTable.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 8229855
+ * @summary Test jump table with key value that gets out of bounds after loop unrolling.
+ * @run main/othervm -XX:CompileCommand=dontinline,compiler.c2.TestJumpTable::test*
+ *                   -Xbatch -XX:-TieredCompilation -XX:-UseSwitchProfiling
+ *                   compiler.c2.TestJumpTable
+ */
+
+package compiler.c2;
+
+public class TestJumpTable {
+
+    public static int test() {
+        int res = 0;
+        for (int i = 10; i < 50; ++i) {
+            switch (i * 5) {
+                case 15:
+                case 25:
+                case 40:
+                case 101:
+                    return 42;
+                case 45:
+                case 51:
+                case 60:
+                    res++;
+                    break;
+            }
+        }
+        return res;
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < 20_000; ++i) {
+            test();
+        }
+    }
+}

test/hotspot/jtreg/gc/shenandoah/jvmti/TestHeapDump.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2017, 2020, Red Hat, Inc. All rights reserved.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
@@ -40,6 +40,15 @@
  * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive -XX:-UseCompressedOops TestHeapDump
  */
 
+/**
+ * @test TestHeapDump
+ * @summary Tests JVMTI heap dumps
+ * @key gc
+ * @requires vm.gc.Shenandoah & !vm.graal.enabled
+ * @compile TestHeapDump.java
+ * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive                         -XX:+UseStringDeduplication TestHeapDump
+ */
+
 import java.lang.ref.Reference;
 
 public class TestHeapDump {

test/hotspot/jtreg/serviceability/jvmti/CompiledMethodLoad/libCompiledZombie.cpp

@@ -67,7 +67,8 @@ void JNICALL VMInit(jvmtiEnv* jvmti, JNIEnv* jni, jthread thread) {
     jvmti->RunAgentThread(agent_thread, GenerateEventsThread, NULL, JVMTI_THREAD_NORM_PRIORITY);
 }
 
-jint Agent_OnLoad(JavaVM* vm, char* options, void* reserved) {
+JNIEXPORT
+jint JNICALL Agent_OnLoad(JavaVM* vm, char* options, void* reserved) {
     jvmtiEnv* jvmti;
     vm->GetEnv((void**)&jvmti, JVMTI_VERSION_1_0);
 

test/jdk/java/foreign/TestArrays.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2020, 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
@@ -38,6 +38,7 @@ import java.lang.invoke.VarHandle;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
+import org.testng.SkipException;
 import org.testng.annotations.*;
 import static org.testng.Assert.*;
 
@@ -76,8 +77,8 @@ public class TestArrays {
     static VarHandle shortHandle = shorts.varHandle(short.class, PathElement.sequenceElement());
     static VarHandle intHandle = ints.varHandle(int.class, PathElement.sequenceElement());
     static VarHandle floatHandle = floats.varHandle(float.class, PathElement.sequenceElement());
-    static VarHandle longHandle = doubles.varHandle(long.class, PathElement.sequenceElement());
-    static VarHandle doubleHandle = longs.varHandle(double.class, PathElement.sequenceElement());
+    static VarHandle longHandle = longs.varHandle(long.class, PathElement.sequenceElement());
+    static VarHandle doubleHandle = doubles.varHandle(double.class, PathElement.sequenceElement());
 
     static void initBytes(MemoryAddress base, SequenceLayout seq, BiConsumer<MemoryAddress, Long> handleSetter) {
         for (long i = 0; i < seq.elementCount().getAsLong() ; i++) {
@@ -103,8 +104,13 @@ public class TestArrays {
         }
     }
 
-    @Test(expectedExceptions = UnsupportedOperationException.class)
+    @Test(expectedExceptions = { UnsupportedOperationException.class,
+                                 OutOfMemoryError.class })
     public void testTooBigForArray() {
+        if (System.getProperty("sun.arch.data.model").equals("32")) {
+            throw new SkipException("32-bit Unsafe does not support this allocation size");
+        }
+
         MemorySegment.allocateNative((long) Integer.MAX_VALUE * 2).toByteArray();
     }
 

test/jdk/java/foreign/TestByteBuffer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2020, 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
@@ -70,6 +70,7 @@ import java.util.function.Supplier;
 import java.util.stream.Stream;
 
 import jdk.internal.foreign.MemoryAddressImpl;
+import org.testng.SkipException;
 import org.testng.annotations.*;
 import sun.nio.ch.DirectBuffer;
 
@@ -119,8 +120,8 @@ public class TestByteBuffer {
     static VarHandle shortHandle = shorts.varHandle(short.class, PathElement.sequenceElement());
     static VarHandle intHandle = ints.varHandle(int.class, PathElement.sequenceElement());
     static VarHandle floatHandle = floats.varHandle(float.class, PathElement.sequenceElement());
-    static VarHandle longHandle = doubles.varHandle(long.class, PathElement.sequenceElement());
-    static VarHandle doubleHandle = longs.varHandle(double.class, PathElement.sequenceElement());
+    static VarHandle longHandle = longs.varHandle(long.class, PathElement.sequenceElement());
+    static VarHandle doubleHandle = doubles.varHandle(double.class, PathElement.sequenceElement());
 
 
     static void initTuples(MemoryAddress base) {
@@ -247,6 +248,13 @@ public class TestByteBuffer {
         }
     }
 
+    static void checkByteArrayAlignment(MemoryLayout layout) {
+        if (layout.bitSize() > 32
+                && System.getProperty("sun.arch.data.model").equals("32")) {
+            throw new SkipException("avoid unaligned access on 32-bit system");
+        }
+    }
+
     @Test(dataProvider = "bufferOps")
     public void testScopedBuffer(Function<ByteBuffer, Buffer> bufferFactory, Map<Method, Object[]> members) {
         Buffer bb;
@@ -338,6 +346,7 @@ public class TestByteBuffer {
 
     @Test(dataProvider="resizeOps")
     public void testResizeHeap(Consumer<MemoryAddress> checker, Consumer<MemoryAddress> initializer, SequenceLayout seq) {
+        checkByteArrayAlignment(seq.elementLayout());
         int capacity = (int)seq.byteSize();
         MemoryAddress base = MemorySegment.ofArray(new byte[capacity]).baseAddress();
         initializer.accept(base);
@@ -346,6 +355,7 @@ public class TestByteBuffer {
 
     @Test(dataProvider="resizeOps")
     public void testResizeBuffer(Consumer<MemoryAddress> checker, Consumer<MemoryAddress> initializer, SequenceLayout seq) {
+        checkByteArrayAlignment(seq.elementLayout());
         int capacity = (int)seq.byteSize();
         MemoryAddress base = MemorySegment.ofByteBuffer(ByteBuffer.wrap(new byte[capacity])).baseAddress();
         initializer.accept(base);
@@ -354,6 +364,7 @@ public class TestByteBuffer {
 
     @Test(dataProvider="resizeOps")
     public void testResizeRoundtripHeap(Consumer<MemoryAddress> checker, Consumer<MemoryAddress> initializer, SequenceLayout seq) {
+        checkByteArrayAlignment(seq.elementLayout());
         int capacity = (int)seq.byteSize();
         byte[] arr = new byte[capacity];
         MemorySegment segment = MemorySegment.ofArray(arr);
@@ -382,13 +393,19 @@ public class TestByteBuffer {
         leaked.asByteBuffer();
     }
 
-    @Test(expectedExceptions = UnsupportedOperationException.class)
+    @Test(expectedExceptions = { UnsupportedOperationException.class,
+                                 OutOfMemoryError.class })
     public void testTooBigForByteBuffer() {
+        if (System.getProperty("sun.arch.data.model").equals("32")) {
+            throw new SkipException("32-bit Unsafe does not support this allocation size");
+        }
+
         MemorySegment.allocateNative((long) Integer.MAX_VALUE * 2).asByteBuffer();
     }
 
     @Test(dataProvider="resizeOps")
     public void testCopyHeapToNative(Consumer<MemoryAddress> checker, Consumer<MemoryAddress> initializer, SequenceLayout seq) {
+        checkByteArrayAlignment(seq.elementLayout());
         int bytes = (int)seq.byteSize();
         try (MemorySegment nativeArray = MemorySegment.allocateNative(bytes);
              MemorySegment heapArray = MemorySegment.ofArray(new byte[bytes])) {
@@ -400,6 +417,7 @@ public class TestByteBuffer {
 
     @Test(dataProvider="resizeOps")
     public void testCopyNativeToHeap(Consumer<MemoryAddress> checker, Consumer<MemoryAddress> initializer, SequenceLayout seq) {
+        checkByteArrayAlignment(seq.elementLayout());
         int bytes = (int)seq.byteSize();
         try (MemorySegment nativeArray = MemorySegment.allocateNative(seq);
              MemorySegment heapArray = MemorySegment.ofArray(new byte[bytes])) {

test/jdk/java/foreign/TestMemoryAlignment.java

@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ *  Copyright (c) 2019, 2020, 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
@@ -23,6 +23,7 @@
 
 /*
  * @test
+ * @requires vm.bits != "32"
  * @run testng TestMemoryAlignment
  */
 

test/jdk/java/foreign/TestSegments.java

@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ *  Copyright (c) 2019, 2020, 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
@@ -58,7 +58,8 @@ public class TestSegments {
         MemorySegment.allocateNative(layout);
     }
 
-    @Test(expectedExceptions = OutOfMemoryError.class)
+    @Test(expectedExceptions = { OutOfMemoryError.class,
+                                 IllegalArgumentException.class })
     public void testAllocateTooBig() {
         MemorySegment.allocateNative(Long.MAX_VALUE);
     }

test/jdk/java/foreign/libNativeAccess.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ *  Copyright (c) 2019, 2020, 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
@@ -24,88 +24,89 @@
 
 #include "jni.h"
 #include <stdio.h>
+#include <stdint.h>
 
 JNIEXPORT jbyte JNICALL
 Java_TestNative_getByteRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jbyte *arr = (jbyte*)addr;
+    jbyte *arr = (jbyte*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jbyte JNICALL
 Java_TestNative_getByteBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getByteRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jchar JNICALL
 Java_TestNative_getCharRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jchar *arr = (jchar*)addr;
+    jchar *arr = (jchar*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jchar JNICALL
 Java_TestNative_getCharBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getCharRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jshort JNICALL
 Java_TestNative_getShortRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jshort *arr = (jshort*)addr;
+    jshort *arr = (jshort*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jshort JNICALL
 Java_TestNative_getShortBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getShortRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jint JNICALL
 Java_TestNative_getIntRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jint *arr = (jint*)addr;
+    jint *arr = (jint*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jint JNICALL
 Java_TestNative_getIntBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getIntRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jfloat JNICALL
 Java_TestNative_getFloatRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jfloat *arr = (jfloat*)addr;
+    jfloat *arr = (jfloat*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jfloat JNICALL
 Java_TestNative_getFloatBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getFloatRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jlong JNICALL
 Java_TestNative_getLongRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jlong *arr = (jlong*)addr;
+    jlong *arr = (jlong*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jlong JNICALL
 Java_TestNative_getLongBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getLongRaw(env, cls, addr, index);
 }
 
 JNIEXPORT jdouble JNICALL
 Java_TestNative_getDoubleRaw(JNIEnv *env, jclass cls, jlong addr, jint index) {
-    jdouble *arr = (jdouble*)addr;
+    jdouble *arr = (jdouble*)(uintptr_t)addr;
     return arr[index];
 }
 
 JNIEXPORT jdouble JNICALL
 Java_TestNative_getDoubleBuffer(JNIEnv *env, jclass cls, jobject buf, jint index) {
-    jlong addr = (jlong)(*env)->GetDirectBufferAddress(env, buf);
+    jlong addr = (jlong)(uintptr_t)(*env)->GetDirectBufferAddress(env, buf);
     return Java_TestNative_getDoubleRaw(env, cls, addr, index);
 }
 

test/jdk/tools/jlink/plugins/IncludeLocalesPluginTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -41,7 +41,7 @@ import tests.Result;
 /*
  * @test
  * @bug 8152143 8152704 8155649 8165804 8185841 8176841 8190918
- *      8179071 8202537 8221432
+ *      8179071 8202537 8221432 8222098
  * @summary IncludeLocalesPlugin tests
  * @author Naoto Sato
  * @requires (vm.compMode != "Xcomp" & os.maxMemory >= 2g)
@@ -56,7 +56,7 @@ import tests.Result;
  *          jdk.compiler
  * @build tests.*
  * @build tools.jlink.plugins.GetAvailableLocales
- * @run main/othervm -Xmx1g IncludeLocalesPluginTest
+ * @run main/othervm/timeout=180 -Xmx1g IncludeLocalesPluginTest
  */
 public class IncludeLocalesPluginTest {
 

test/langtools/jdk/jshell/RecordsTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2020, 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
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8235474
+ * @bug 8235474 8236715
  * @summary Tests for evalution of records
  * @modules jdk.jshell
  * @build KullaTesting TestingInputStream ExpectedDiagnostic
@@ -33,6 +33,8 @@
 import org.testng.annotations.Test;
 
 import javax.lang.model.SourceVersion;
+import jdk.jshell.Snippet.Status;
+import jdk.jshell.UnresolvedReferenceException;
 import static org.testng.Assert.assertEquals;
 import org.testng.annotations.BeforeMethod;
 
@@ -46,6 +48,24 @@ public class RecordsTest extends KullaTesting {
         assertEval("r.i()", "42");
     }
 
+    public void testRecordCorralling() {
+        //simple record with a mistake that can be fixed by corralling:
+        assertEval("record R1(int i) { int g() { return j; } }", ste(MAIN_SNIPPET, Status.NONEXISTENT, Status.RECOVERABLE_DEFINED, true, null));
+        assertEval("R1 r1 = new R1(1);", null, UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, added(Status.VALID));
+        //record with a concise constructor and a mistake take can be fixed by corralling:
+        assertEval("record R2(int i) { public R2 {} int g() { return j; } }", ste(MAIN_SNIPPET, Status.NONEXISTENT, Status.RECOVERABLE_DEFINED, true, null));
+        assertEval("R2 r2 = new R2(1);", null, UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, added(Status.VALID));
+        //record with a full constructor and a mistake take can be fixed by corralling:
+        assertEval("record R3(int i) { public R3(int i) {this.i = i;} int g() { return j; } }", ste(MAIN_SNIPPET, Status.NONEXISTENT, Status.RECOVERABLE_DEFINED, true, null));
+        assertEval("R3 r3 = new R3(1);", null, UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, added(Status.VALID));
+        //record with an accessor and a mistake take can be fixed by corralling:
+        assertEval("record R4(int i) { public int i() { return i; } int g() { return j; } }", ste(MAIN_SNIPPET, Status.NONEXISTENT, Status.RECOVERABLE_DEFINED, true, null));
+        assertEval("R4 r4 = new R4(1);", null, UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, added(Status.VALID));
+        //record with an accessor with a mistake take can be fixed by corralling:
+        assertEval("record R5(int i) { public int i() { return j; } }", ste(MAIN_SNIPPET, Status.NONEXISTENT, Status.RECOVERABLE_DEFINED, true, null));
+        assertEval("R5 r5 = new R5(1);", null, UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, added(Status.VALID));
+    }
+
     public void testRecordField() {
         assertEquals(varKey(assertEval("String record = \"\";")).name(), "record");
         assertEval("record.length()", "0");

test/langtools/jdk/jshell/ToolLocalSimpleTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -100,4 +100,8 @@ public class ToolLocalSimpleTest extends ToolSimpleTest {
         // can't set --enable-preview for local, ignore
     }
 
+    @Override
+    public void testRecords() {
+        // can't set --enable-preview for local, ignore
+    }
 }

test/langtools/jdk/jshell/ToolSimpleTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8153716 8143955 8151754 8150382 8153920 8156910 8131024 8160089 8153897 8167128 8154513 8170015 8170368 8172102 8172103  8165405 8173073 8173848 8174041 8173916 8174028 8174262 8174797 8177079 8180508 8177466 8172154 8192979 8191842 8198573 8198801 8210596 8210959 8215099 8199623
+ * @bug 8153716 8143955 8151754 8150382 8153920 8156910 8131024 8160089 8153897 8167128 8154513 8170015 8170368 8172102 8172103  8165405 8173073 8173848 8174041 8173916 8174028 8174262 8174797 8177079 8180508 8177466 8172154 8192979 8191842 8198573 8198801 8210596 8210959 8215099 8199623 8236715
  * @summary Simple jshell tool tests
  * @modules jdk.compiler/com.sun.tools.javac.api
  *          jdk.compiler/com.sun.tools.javac.main
@@ -902,4 +902,14 @@ public class ToolSimpleTest extends ReplToolTesting {
                 a -> assertCommandOutputContains(a, "a", "A@")
         );
     }
+
+    @Test
+    public void testRecords() {
+        test(new String[] {"--enable-preview"},
+                (a) -> assertCommandOutputContains(a, "record R(int i) { public int g() { return j; } }",
+                        "|  created record R, however, it cannot be instantiated or its methods invoked until variable j is declared"),
+                (a) -> assertCommandOutputContains(a, "new R(0)",
+                        "|  attempted to use record R which cannot be instantiated or its methods invoked until variable j is declared")
+        );
+    }
 }

test/langtools/tools/javac/records/RecordCompilationTests.java

@@ -437,6 +437,17 @@ public class RecordCompilationTests extends CompilationTestCase {
         assertOK("record R(int x) { public R { Runnable r = () -> { return; };} }");
     }
 
+    public void testArgumentsAreNotFinalInCompact() {
+        assertOK(
+                """
+                record R(int x) {
+                    public R {
+                        x++;
+                    }
+                }
+                """);
+    }
+
     public void testNoNativeMethods() {
         assertFail("compiler.err.mod.not.allowed.here", "record R(int x) { # }",
                 "public native R {}");

test/langtools/tools/javac/switchexpr/ExpressionSwitchEmbedding.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2020, 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
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8214031 8214114
+ * @bug 8214031 8214114 8236546
  * @summary Verify switch expressions embedded in various statements work properly.
  * @compile ExpressionSwitchEmbedding.java
  * @run main ExpressionSwitchEmbedding
@@ -321,6 +321,13 @@ public class ExpressionSwitchEmbedding {
                 throw new IllegalStateException();
             }
         }
+        {
+            String s = "";
+            Object o = switch (s) { default -> s != null && s == s; };
+            if (!(Boolean) o) {
+                throw new IllegalStateException();
+            }
+        }
     }
 
     private void throwException() {

test/langtools/tools/jdeps/missingDeps/MissingDepsTest.java

@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Tests jdeps option on a MR jar with missing dependences
+ * @library ../lib
+ * @build CompilerUtils JdepsUtil
+ * @modules jdk.jdeps/com.sun.tools.jdeps
+ * @run testng MissingDepsTest
+ */
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.spi.ToolProvider;
+import java.util.stream.Stream;
+
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertTrue;
+import static org.testng.Assert.assertEquals;
+
+
+public class MissingDepsTest {
+    private static final String TEST_SRC = System.getProperty("test.src");
+    private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");
+
+    private static final Path MODS_DIR = Paths.get("mods");
+    private static final Path CLASSES_DIR = Paths.get("classes");
+
+    private static final ToolProvider JAR_TOOL = ToolProvider.findFirst("jar").orElseThrow();
+    private static final String VERSION = "13";
+
+    private static final Set<String> modules = Set.of("m1", "m2");
+
+    /**
+     * Compiles classes used by the test
+     */
+    @BeforeTest
+    public void compileAll() throws Exception {
+        CompilerUtils.cleanDir(MODS_DIR);
+        modules.forEach(mn ->
+                assertTrue(CompilerUtils.compileModule(SRC_DIR, MODS_DIR, mn)));
+
+        // compile a versioned class file
+        Path versionedFile = Paths.get(TEST_SRC, "p/internal/X.java");
+        assertTrue(CompilerUtils.compile(versionedFile, CLASSES_DIR, "-cp", MODS_DIR.resolve("m2").toString()));
+
+        // create a modular multi-release m1.jar
+        JAR_TOOL.run(System.out, System.err, "cf", "m1.jar",
+                     "-C", MODS_DIR.resolve("m1").toString(), ".");
+        JAR_TOOL.run(System.out, System.err, "uf", "m1.jar",
+                     "--release", VERSION, "-C", CLASSES_DIR.toString(), "p/internal/X.class");
+        // create a non-modular multi-release mr.jar
+        JAR_TOOL.run(System.out, System.err, "cf", "mr.jar",
+                     "-C", MODS_DIR.resolve("m1").toString(), "p/Foo.class",
+                     "--release", VERSION, "-C", CLASSES_DIR.toString(), "p/internal/X.class");
+    }
+
+    @Test
+    public void checkModuleDeps() {
+        JdepsTest test = new JdepsTest();
+        test.options(List.of("--module-path", "m1.jar", "--multi-release", VERSION, "--check", "m1"));
+        test.checkMissingDeps();
+        test.ignoreMissingDeps("requires java.management");
+    }
+
+    @Test
+    public void genModuleInfo() {
+        JdepsTest test = new JdepsTest();
+        test.options(List.of("--generate-module-info", ".", "--multi-release", VERSION, "mr.jar"));
+        test.checkMissingDeps();
+        Path file = Paths.get("mr", "versions", VERSION, "module-info.java");
+        test.ignoreMissingDeps(file.toString());
+        assertTrue(Files.exists(file));
+    }
+
+    @Test
+    public void listModuleDeps() {
+        JdepsTest test = new JdepsTest();
+        test.options(List.of("--list-deps", "--multi-release", VERSION, "mr.jar"));
+        test.checkMissingDeps();
+        test.ignoreMissingDeps("java.management");
+    }
+
+    class JdepsTest {
+        // set DEBUG to true to show the jdeps output
+        static final boolean DEBUG = false;
+        List<String> options;
+        JdepsTest options(List<String> options) {
+            this.options = options;
+            return this;
+        }
+
+        private void checkMissingDeps() {
+            JdepsRunner jdepsRunner = new JdepsRunner(options.toArray(new String[0]));
+            int rc = jdepsRunner.run(DEBUG);
+            assertTrue(rc != 0);
+            String regex = "\\s+13/p.internal.X\\s+->\\s+q.T\\s+not found";
+            assertTrue(Arrays.stream(jdepsRunner.output()).anyMatch(l -> l.matches(regex)));
+        }
+
+        public void ignoreMissingDeps(String expected) {
+            JdepsRunner jdepsRunner = new JdepsRunner(Stream.concat(Stream.of("--ignore-missing-deps"), options.stream())
+                                                            .toArray(String[]::new));
+            int rc = jdepsRunner.run(DEBUG);
+            assertTrue(rc == 0);
+            System.out.println("Expected: " + expected);
+            assertTrue(Arrays.stream(jdepsRunner.output()).anyMatch(l -> l.contains(expected)));
+        }
+    }
+}

test/langtools/tools/jdeps/missingDeps/p/internal/X.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package p.internal;
+
+import java.lang.management.*;
+
+class X implements q.T {
+    public void upTime() {
+        ManagementFactory.getRuntimeMXBean().getUptime();
+    }
+}

test/langtools/tools/jdeps/missingDeps/src/m1/module-info.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+module m1 {
+    requires static m2;
+    exports p;
+}

test/langtools/tools/jdeps/missingDeps/src/m1/p/Foo.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package p;
+
+public class Foo implements Runnable {
+   public void run() {
+   }
+}

test/langtools/tools/jdeps/missingDeps/src/m2/module-info.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+module m2 {
+    exports q;
+}

test/langtools/tools/jdeps/missingDeps/src/m2/q/Bar.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package q;
+
+public interface Bar {
+   default String name() {
+       return "";
+   }
+}

test/langtools/tools/jdeps/missingDeps/src/m2/q/T.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package q;
+
+public interface T {
+}

test/langtools/tools/jdeps/modules/CheckModuleTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, 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
@@ -86,7 +86,7 @@ public class CheckModuleTest {
             jdeps.appModulePath(MODS_DIR.toString());
 
             ModuleAnalyzer analyzer = jdeps.getModuleAnalyzer(Set.of(name));
-            assertTrue(analyzer.run());
+            assertTrue(analyzer.run(false));
             jdeps.dumpOutput(System.err);
 
             ModuleDescriptor[] descriptors = analyzer.descriptors(name);
@@ -146,7 +146,7 @@ public class CheckModuleTest {
             jdeps.appModulePath(MODS_DIR.toString());
 
             ModuleAnalyzer analyzer = jdeps.getModuleAnalyzer(Set.of(name));
-            assertTrue(analyzer.run());
+            assertTrue(analyzer.run(false));
             jdeps.dumpOutput(System.err);
 
             // compare the module descriptors and the suggested versions