68 assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size");
69
70 // Update current stubs pointer and restore code_end.
71 __ end_a_stub();
72 return base;
73 }
74 #undef __
75
76 int CompiledStaticCall::to_interp_stub_size() {
77 // This doesn't need to be accurate but it must be larger or equal to
78 // the real size of the stub.
79 return (NativeMovConstReg::instruction_size + // sethi/setlo;
80 NativeJump::instruction_size); // sethi; jmp; nop
81 }
82
83 // Relocation entries for call stub, compiled java to interpreter.
84 int CompiledStaticCall::reloc_to_interp_stub() {
85 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
86 }
87
88 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
89 address stub = find_stub();
90 guarantee(stub != NULL, "stub not found");
91
92 if (TraceICs) {
93 ResourceMark rm;
94 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
95 p2i(instruction_address()),
96 callee->name_and_sig_as_C_string());
97 }
98
99 // Creation also verifies the object.
100 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
101 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
102
103 #ifdef ASSERT
104 // read the value once
105 intptr_t data = method_holder->data();
106 address destination = jump->jump_destination();
107 assert(data == 0 || data == (intptr_t)callee(),
108 "a) MT-unsafe modification of inline cache");
109 assert(destination == (address)-1 || destination == entry,
110 "b) MT-unsafe modification of inline cache");
111 #endif
112
113 // Update stub.
114 method_holder->set_data((intptr_t)callee());
115 jump->set_jump_destination(entry);
116
117 // Update jump to call.
118 set_destination_mt_safe(stub);
119 }
120
121 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
122 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
123 // Reset stub.
124 address stub = static_stub->addr();
125 assert(stub != NULL, "stub not found");
126 // Creation also verifies the object.
127 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
128 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
129 method_holder->set_data(0);
130 jump->set_jump_destination((address)-1);
131 }
132
133 //-----------------------------------------------------------------------------
134 // Non-product mode code
135 #ifndef PRODUCT
136
137 void CompiledStaticCall::verify() {
138 // Verify call.
139 NativeCall::verify();
140 if (os::is_MP()) {
141 verify_alignment();
142 }
143
144 // Verify stub.
145 address stub = find_stub();
146 assert(stub != NULL, "no stub found for static call");
147 // Creation also verifies the object.
148 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
149 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
150
151 // Verify state.
152 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
153 }
154
155 #endif // !PRODUCT
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68 assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size");
69
70 // Update current stubs pointer and restore code_end.
71 __ end_a_stub();
72 return base;
73 }
74 #undef __
75
76 int CompiledStaticCall::to_interp_stub_size() {
77 // This doesn't need to be accurate but it must be larger or equal to
78 // the real size of the stub.
79 return (NativeMovConstReg::instruction_size + // sethi/setlo;
80 NativeJump::instruction_size); // sethi; jmp; nop
81 }
82
83 // Relocation entries for call stub, compiled java to interpreter.
84 int CompiledStaticCall::reloc_to_interp_stub() {
85 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
86 }
87
88 void CompiledDirectStaticCall::set_to_interpreted(const methodHandle& callee, address entry) {
89 address stub = find_stub(/*is_aot*/ false);
90 guarantee(stub != NULL, "stub not found");
91
92 if (TraceICs) {
93 ResourceMark rm;
94 tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
95 p2i(instruction_address()),
96 callee->name_and_sig_as_C_string());
97 }
98
99 // Creation also verifies the object.
100 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
101 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
102
103 #ifdef ASSERT
104 // read the value once
105 intptr_t data = method_holder->data();
106 address destination = jump->jump_destination();
107 assert(data == 0 || data == (intptr_t)callee(),
108 "a) MT-unsafe modification of inline cache");
109 assert(destination == (address)-1 || destination == entry,
110 "b) MT-unsafe modification of inline cache");
111 #endif
112
113 // Update stub.
114 method_holder->set_data((intptr_t)callee());
115 jump->set_jump_destination(entry);
116
117 // Update jump to call.
118 set_destination_mt_safe(stub);
119 }
120
121 void CompiledDirectStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
122 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
123 // Reset stub.
124 address stub = static_stub->addr();
125 assert(stub != NULL, "stub not found");
126 // Creation also verifies the object.
127 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
128 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
129 method_holder->set_data(0);
130 jump->set_jump_destination((address)-1);
131 }
132
133 //-----------------------------------------------------------------------------
134 // Non-product mode code
135 #ifndef PRODUCT
136
137 void CompiledDirectStaticCall::verify() {
138 // Verify call.
139 _call->verify();
140 if (os::is_MP()) {
141 _call->verify_alignment();
142 }
143
144 // Verify stub.
145 address stub = find_stub(/*is_aot*/ false);
146 assert(stub != NULL, "no stub found for static call");
147 // Creation also verifies the object.
148 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
149 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
150
151 // Verify state.
152 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
153 }
154
155 #endif // !PRODUCT
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