59 // static stub relocation also tags the Method* in the code-stream.
60 __ mov_metadata(rmethod, (Metadata*)NULL);
61 __ movptr(rscratch1, 0);
62 __ br(rscratch1);
63
64 assert((__ offset() - offset) <= (int)to_interp_stub_size(), "stub too big");
65 __ end_a_stub();
66 return base;
67 }
68 #undef __
69
70 int CompiledStaticCall::to_interp_stub_size() {
71 return 7 * NativeInstruction::instruction_size;
72 }
73
74 // Relocation entries for call stub, compiled java to interpreter.
75 int CompiledStaticCall::reloc_to_interp_stub() {
76 return 4; // 3 in emit_to_interp_stub + 1 in emit_call
77 }
78
79 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
80 address stub = find_stub();
81 guarantee(stub != NULL, "stub not found");
82
83 if (TraceICs) {
84 ResourceMark rm;
85 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
86 p2i(instruction_address()),
87 callee->name_and_sig_as_C_string());
88 }
89
90 // Creation also verifies the object.
91 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
92 #ifndef PRODUCT
93 NativeGeneralJump* jump = nativeGeneralJump_at(method_holder->next_instruction_address());
94
95 // read the value once
96 volatile intptr_t data = method_holder->data();
97 assert(data == 0 || data == (intptr_t)callee(),
98 "a) MT-unsafe modification of inline cache");
99 assert(data == 0 || jump->jump_destination() == entry,
100 "b) MT-unsafe modification of inline cache");
101 #endif
102 // Update stub.
103 method_holder->set_data((intptr_t)callee());
104 NativeGeneralJump::insert_unconditional(method_holder->next_instruction_address(), entry);
105 ICache::invalidate_range(stub, to_interp_stub_size());
106 // Update jump to call.
107 set_destination_mt_safe(stub);
108 }
109
110 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
111 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
112 // Reset stub.
113 address stub = static_stub->addr();
114 assert(stub != NULL, "stub not found");
115 // Creation also verifies the object.
116 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
117 method_holder->set_data(0);
118 }
119
120 //-----------------------------------------------------------------------------
121 // Non-product mode code
122 #ifndef PRODUCT
123
124 void CompiledStaticCall::verify() {
125 // Verify call.
126 NativeCall::verify();
127 if (os::is_MP()) {
128 verify_alignment();
129 }
130
131 // Verify stub.
132 address stub = find_stub();
133 assert(stub != NULL, "no stub found for static call");
134 // Creation also verifies the object.
135 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
136 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
137
138 // Verify state.
139 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
140 }
141
142 #endif // !PRODUCT
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59 // static stub relocation also tags the Method* in the code-stream.
60 __ mov_metadata(rmethod, (Metadata*)NULL);
61 __ movptr(rscratch1, 0);
62 __ br(rscratch1);
63
64 assert((__ offset() - offset) <= (int)to_interp_stub_size(), "stub too big");
65 __ end_a_stub();
66 return base;
67 }
68 #undef __
69
70 int CompiledStaticCall::to_interp_stub_size() {
71 return 7 * NativeInstruction::instruction_size;
72 }
73
74 // Relocation entries for call stub, compiled java to interpreter.
75 int CompiledStaticCall::reloc_to_interp_stub() {
76 return 4; // 3 in emit_to_interp_stub + 1 in emit_call
77 }
78
79 void CompiledDirectStaticCall::set_to_interpreted(const methodHandle& callee, address entry) {
80 address stub = find_stub(false /* is_aot */);
81 guarantee(stub != NULL, "stub not found");
82
83 if (TraceICs) {
84 ResourceMark rm;
85 tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
86 p2i(instruction_address()),
87 callee->name_and_sig_as_C_string());
88 }
89
90 // Creation also verifies the object.
91 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
92 #ifndef PRODUCT
93 NativeGeneralJump* jump = nativeGeneralJump_at(method_holder->next_instruction_address());
94
95 // read the value once
96 volatile intptr_t data = method_holder->data();
97 assert(data == 0 || data == (intptr_t)callee(),
98 "a) MT-unsafe modification of inline cache");
99 assert(data == 0 || jump->jump_destination() == entry,
100 "b) MT-unsafe modification of inline cache");
101 #endif
102 // Update stub.
103 method_holder->set_data((intptr_t)callee());
104 NativeGeneralJump::insert_unconditional(method_holder->next_instruction_address(), entry);
105 ICache::invalidate_range(stub, to_interp_stub_size());
106 // Update jump to call.
107 set_destination_mt_safe(stub);
108 }
109
110 void CompiledDirectStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
111 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
112 // Reset stub.
113 address stub = static_stub->addr();
114 assert(stub != NULL, "stub not found");
115 // Creation also verifies the object.
116 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
117 method_holder->set_data(0);
118 }
119
120 //-----------------------------------------------------------------------------
121 // Non-product mode code
122 #ifndef PRODUCT
123
124 void CompiledDirectStaticCall::verify() {
125 // Verify call.
126 _call->verify();
127 if (os::is_MP()) {
128 _call->verify_alignment();
129 }
130
131 // Verify stub.
132 address stub = find_stub(false /* is_aot */);
133 assert(stub != NULL, "no stub found for static call");
134 // Creation also verifies the object.
135 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
136 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
137
138 // Verify state.
139 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
140 }
141
142 #endif // !PRODUCT
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