56 switch (type) {
57 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
58 case T_BYTE: name = "jni_fast_GetByteField"; break;
59 case T_CHAR: name = "jni_fast_GetCharField"; break;
60 case T_SHORT: name = "jni_fast_GetShortField"; break;
61 case T_INT: name = "jni_fast_GetIntField"; break;
62 case T_LONG: name = "jni_fast_GetLongField"; break;
63 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
64 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
65 default: ShouldNotReachHere();
66 name = NULL; // unreachable
67 }
68 ResourceMark rm;
69 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
70 CodeBuffer cbuf(blob);
71 MacroAssembler* masm = new MacroAssembler(&cbuf);
72 address fast_entry = __ pc();
73
74 Label slow;
75
76 unsigned long offset;
77 __ adrp(rcounter_addr,
78 SafepointSynchronize::safepoint_counter_addr(), offset);
79 Address safepoint_counter_addr(rcounter_addr, offset);
80 __ ldrw(rcounter, safepoint_counter_addr);
81 __ tbnz(rcounter, 0, slow);
82
83 // It doesn't need to issue a full barrier here even if the field
84 // is volatile, since it has already used "ldar" for it.
85 if (JvmtiExport::can_post_field_access()) {
86 // Using barrier to order wrt. JVMTI check and load of result.
87 __ membar(Assembler::LoadLoad);
88
89 // Check to see if a field access watch has been set before we
90 // take the fast path.
91 unsigned long offset2;
92 __ adrp(result,
93 ExternalAddress((address) JvmtiExport::get_field_access_count_addr()),
94 offset2);
95 __ ldrw(result, Address(result, offset2));
96 __ cbnzw(result, slow);
97
98 __ mov(robj, c_rarg1);
99 } else {
100 // Using address dependency to order wrt. load of result.
101 __ eor(robj, c_rarg1, rcounter);
102 __ eor(robj, robj, rcounter); // obj, since
103 // robj ^ rcounter ^ rcounter == robj
104 // robj is address dependent on rcounter.
105 }
106
107 // Both robj and rscratch1 are clobbered by try_resolve_jobject_in_native.
108 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
109 bs->try_resolve_jobject_in_native(masm, c_rarg0, robj, rscratch1, slow);
110
111 __ lsr(roffset, c_rarg2, 2); // offset
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56 switch (type) {
57 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
58 case T_BYTE: name = "jni_fast_GetByteField"; break;
59 case T_CHAR: name = "jni_fast_GetCharField"; break;
60 case T_SHORT: name = "jni_fast_GetShortField"; break;
61 case T_INT: name = "jni_fast_GetIntField"; break;
62 case T_LONG: name = "jni_fast_GetLongField"; break;
63 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
64 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
65 default: ShouldNotReachHere();
66 name = NULL; // unreachable
67 }
68 ResourceMark rm;
69 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
70 CodeBuffer cbuf(blob);
71 MacroAssembler* masm = new MacroAssembler(&cbuf);
72 address fast_entry = __ pc();
73
74 Label slow;
75
76 uint64_t offset;
77 __ adrp(rcounter_addr,
78 SafepointSynchronize::safepoint_counter_addr(), offset);
79 Address safepoint_counter_addr(rcounter_addr, offset);
80 __ ldrw(rcounter, safepoint_counter_addr);
81 __ tbnz(rcounter, 0, slow);
82
83 // It doesn't need to issue a full barrier here even if the field
84 // is volatile, since it has already used "ldar" for it.
85 if (JvmtiExport::can_post_field_access()) {
86 // Using barrier to order wrt. JVMTI check and load of result.
87 __ membar(Assembler::LoadLoad);
88
89 // Check to see if a field access watch has been set before we
90 // take the fast path.
91 uint64_t offset2;
92 __ adrp(result,
93 ExternalAddress((address) JvmtiExport::get_field_access_count_addr()),
94 offset2);
95 __ ldrw(result, Address(result, offset2));
96 __ cbnzw(result, slow);
97
98 __ mov(robj, c_rarg1);
99 } else {
100 // Using address dependency to order wrt. load of result.
101 __ eor(robj, c_rarg1, rcounter);
102 __ eor(robj, robj, rcounter); // obj, since
103 // robj ^ rcounter ^ rcounter == robj
104 // robj is address dependent on rcounter.
105 }
106
107 // Both robj and rscratch1 are clobbered by try_resolve_jobject_in_native.
108 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
109 bs->try_resolve_jobject_in_native(masm, c_rarg0, robj, rscratch1, slow);
110
111 __ lsr(roffset, c_rarg2, 2); // offset
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