5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "aot/compiledIC_aot.hpp"
25 #include "memory/resourceArea.hpp"
26 #include "code/codeCache.hpp"
27
28 void CompiledDirectStaticCall::set_to_far(methodHandle callee, address entry) {
29 address stub = find_stub(true /* is_far */);
30 guarantee(stub != NULL, "stub not found");
31
32 if (TraceICs) {
33 ResourceMark rm;
34 tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_far %s",
35 p2i(instruction_address()),
36 callee->name_and_sig_as_C_string());
37 }
38
39 // Creation also verifies the object.
40 // mov rax,imm_aot_addr
41 // jmp rax
42 NativeMovConstReg* destination_holder = nativeMovConstReg_at(stub);
43
44 #ifdef ASSERT
45 // read the value once
46 intptr_t data = destination_holder->data();
47 assert(data == 0 || data == (intptr_t)entry,
48 "MT-unsafe modification of inline cache");
49 #endif
50
51 // Update stub.
52 destination_holder->set_data((intptr_t)entry);
53
54 // Update jump to call.
55 set_destination_mt_safe(stub);
56 }
57
58 void CompiledPltStaticCall::set_to_interpreted(methodHandle callee, address entry) {
59 address stub = find_stub();
60 guarantee(stub != NULL, "stub not found");
61 if (TraceICs) {
62 ResourceMark rm;
63 tty->print_cr("CompiledPltStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
64 p2i(instruction_address()),
65 callee->name_and_sig_as_C_string());
66 }
67
68 // Creation also verifies the object.
69 NativeLoadGot* method_loader = nativeLoadGot_at(stub);
70 NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address());
71
72 intptr_t data = method_loader->data();
73 address destination = jump->destination();
74 assert(data == 0 || data == (intptr_t)callee(),
75 "a) MT-unsafe modification of inline cache");
76 assert(destination == (address)-1 || destination == entry,
77 "b) MT-unsafe modification of inline cache");
78
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5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "aot/compiledIC_aot.hpp"
25 #include "code/codeCache.hpp"
26 #include "memory/resourceArea.hpp"
27
28 void CompiledDirectStaticCall::set_to_far(const methodHandle& callee, address entry) {
29 address stub = find_stub(true /* is_far */);
30 guarantee(stub != NULL, "stub not found");
31
32 if (TraceICs) {
33 ResourceMark rm;
34 tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_far %s",
35 p2i(instruction_address()),
36 callee->name_and_sig_as_C_string());
37 }
38
39 // Creation also verifies the object.
40 // mov rax,imm_aot_addr
41 // jmp rax
42 NativeMovConstReg* destination_holder = nativeMovConstReg_at(stub);
43
44 #ifdef ASSERT
45 // read the value once
46 intptr_t data = destination_holder->data();
47 assert(data == 0 || data == (intptr_t)entry,
48 "MT-unsafe modification of inline cache");
49 #endif
50
51 // Update stub.
52 destination_holder->set_data((intptr_t)entry);
53
54 // Update jump to call.
55 set_destination_mt_safe(stub);
56 }
57
58 void CompiledPltStaticCall::set_to_interpreted(const methodHandle& callee, address entry) {
59 address stub = find_stub();
60 guarantee(stub != NULL, "stub not found");
61 if (TraceICs) {
62 ResourceMark rm;
63 tty->print_cr("CompiledPltStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
64 p2i(instruction_address()),
65 callee->name_and_sig_as_C_string());
66 }
67
68 // Creation also verifies the object.
69 NativeLoadGot* method_loader = nativeLoadGot_at(stub);
70 NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address());
71
72 intptr_t data = method_loader->data();
73 address destination = jump->destination();
74 assert(data == 0 || data == (intptr_t)callee(),
75 "a) MT-unsafe modification of inline cache");
76 assert(destination == (address)-1 || destination == entry,
77 "b) MT-unsafe modification of inline cache");
78
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