Mercurial > hg > truffle
annotate src/cpu/sparc/vm/runtime_sparc.cpp @ 3849:f1c12354c3f7
7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths
Summary: replace MemBarAcquire/MemBarRelease nodes on the monitor enter/exit code paths with new MemBarAcquireLock/MemBarReleaseLock nodes
Reviewed-by: kvn, twisti
author | roland |
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date | Tue, 02 Aug 2011 18:36:40 +0200 |
parents | cba7b5c2d53f |
children | f0c2369fda5a |
rev | line source |
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0 | 1 /* |
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7045514: SPARC assembly code for JSR 292 ricochet frames
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2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #ifdef COMPILER2 | |
27 #include "asm/assembler.hpp" | |
28 #include "assembler_sparc.inline.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "code/vmreg.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "nativeInst_sparc.hpp" | |
33 #include "opto/runtime.hpp" | |
34 #include "runtime/interfaceSupport.hpp" | |
35 #include "runtime/sharedRuntime.hpp" | |
36 #include "runtime/stubRoutines.hpp" | |
37 #include "runtime/vframeArray.hpp" | |
38 #include "utilities/globalDefinitions.hpp" | |
39 #include "vmreg_sparc.inline.hpp" | |
40 #endif | |
0 | 41 |
42 | |
43 #define __ masm-> | |
44 | |
45 //------------------------------ generate_exception_blob --------------------------- | |
46 // creates exception blob at the end | |
47 // Using exception blob, this code is jumped from a compiled method. | |
48 // (see emit_exception_handler in sparc.ad file) | |
49 // | |
50 // Given an exception pc at a call we call into the runtime for the | |
51 // handler in this method. This handler might merely restore state | |
52 // (i.e. callee save registers) unwind the frame and jump to the | |
53 // exception handler for the nmethod if there is no Java level handler | |
54 // for the nmethod. | |
55 // | |
56 // This code is entered with a jmp. | |
57 // | |
58 // Arguments: | |
59 // O0: exception oop | |
60 // O1: exception pc | |
61 // | |
62 // Results: | |
63 // O0: exception oop | |
64 // O1: exception pc in caller or ??? | |
65 // destination: exception handler of caller | |
66 // | |
67 // Note: the exception pc MUST be at a call (precise debug information) | |
68 // | |
69 void OptoRuntime::generate_exception_blob() { | |
70 // allocate space for code | |
71 ResourceMark rm; | |
72 int pad = VerifyThread ? 256 : 0;// Extra slop space for more verify code | |
73 | |
74 // setup code generation tools | |
75 // Measured 8/7/03 at 256 in 32bit debug build (no VerifyThread) | |
76 // Measured 8/7/03 at 528 in 32bit debug build (VerifyThread) | |
77 CodeBuffer buffer("exception_blob", 600+pad, 512); | |
78 MacroAssembler* masm = new MacroAssembler(&buffer); | |
79 | |
80 int framesize_in_bytes = __ total_frame_size_in_bytes(0); | |
81 int framesize_in_words = framesize_in_bytes / wordSize; | |
82 int framesize_in_slots = framesize_in_bytes / sizeof(jint); | |
83 | |
84 Label L; | |
85 | |
86 int start = __ offset(); | |
87 | |
88 __ verify_thread(); | |
727 | 89 __ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset()); |
90 __ st_ptr(Oissuing_pc, G2_thread, JavaThread::exception_pc_offset()); | |
0 | 91 |
92 // This call does all the hard work. It checks if an exception catch | |
93 // exists in the method. | |
94 // If so, it returns the handler address. | |
95 // If the nmethod has been deoptimized and it had a handler the handler | |
96 // address is the deopt blob unpack_with_exception entry. | |
97 // | |
98 // If no handler exists it prepares for stack-unwinding, restoring the callee-save | |
99 // registers of the frame being removed. | |
100 // | |
101 __ save_frame(0); | |
102 | |
103 __ mov(G2_thread, O0); | |
104 __ set_last_Java_frame(SP, noreg); | |
105 __ save_thread(L7_thread_cache); | |
106 | |
107 // This call can block at exit and nmethod can be deoptimized at that | |
108 // point. If the nmethod had a catch point we would jump to the | |
109 // now deoptimized catch point and fall thru the vanilla deopt | |
110 // path and lose the exception | |
111 // Sure would be simpler if this call didn't block! | |
112 __ call(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C), relocInfo::runtime_call_type); | |
113 __ delayed()->mov(L7_thread_cache, O0); | |
114 | |
115 // Set an oopmap for the call site. This oopmap will only be used if we | |
116 // are unwinding the stack. Hence, all locations will be dead. | |
117 // Callee-saved registers will be the same as the frame above (i.e., | |
118 // handle_exception_stub), since they were restored when we got the | |
119 // exception. | |
120 | |
121 OopMapSet *oop_maps = new OopMapSet(); | |
122 oop_maps->add_gc_map( __ offset()-start, new OopMap(framesize_in_slots, 0)); | |
123 | |
124 __ bind(L); | |
125 __ restore_thread(L7_thread_cache); | |
126 __ reset_last_Java_frame(); | |
127 | |
128 __ mov(O0, G3_scratch); // Move handler address to temp | |
129 __ restore(); | |
130 | |
1567 | 131 // Restore SP from L7 if the exception PC is a MethodHandle call site. |
132 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), O7); | |
133 __ tst(O7); | |
134 __ movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); | |
135 | |
0 | 136 // G3_scratch contains handler address |
137 // Since this may be the deopt blob we must set O7 to look like we returned | |
138 // from the original pc that threw the exception | |
139 | |
727 | 140 __ ld_ptr(G2_thread, JavaThread::exception_pc_offset(), O7); |
0 | 141 __ sub(O7, frame::pc_return_offset, O7); |
142 | |
143 | |
144 assert(Assembler::is_simm13(in_bytes(JavaThread::exception_oop_offset())), "exception offset overflows simm13, following ld instruction cannot be in delay slot"); | |
727 | 145 __ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); // O0 |
0 | 146 #ifdef ASSERT |
727 | 147 __ st_ptr(G0, G2_thread, JavaThread::exception_handler_pc_offset()); |
148 __ st_ptr(G0, G2_thread, JavaThread::exception_pc_offset()); | |
0 | 149 #endif |
150 __ JMP(G3_scratch, 0); | |
151 // Clear the exception oop so GC no longer processes it as a root. | |
727 | 152 __ delayed()->st_ptr(G0, G2_thread, JavaThread::exception_oop_offset()); |
0 | 153 |
154 // ------------- | |
155 // make sure all code is generated | |
156 masm->flush(); | |
157 | |
158 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize_in_words); | |
159 } |