Mercurial > hg > truffle
annotate src/cpu/sparc/vm/runtime_sparc.cpp @ 15898:c102edf38127
mx: prevent CTRL-C from being blocked while subprocess is running (re-applied without unrelated changes)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 26 May 2014 12:55:17 +0200 |
parents | f0c2369fda5a |
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0 | 1 /* |
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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 | |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "classfile/systemDictionary.hpp" |
29 #include "code/vmreg.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
31 #include "nativeInst_sparc.hpp" | |
32 #include "opto/runtime.hpp" | |
33 #include "runtime/interfaceSupport.hpp" | |
34 #include "runtime/sharedRuntime.hpp" | |
35 #include "runtime/stubRoutines.hpp" | |
36 #include "runtime/vframeArray.hpp" | |
37 #include "utilities/globalDefinitions.hpp" | |
38 #include "vmreg_sparc.inline.hpp" | |
39 #endif | |
0 | 40 |
41 | |
42 #define __ masm-> | |
43 | |
44 //------------------------------ generate_exception_blob --------------------------- | |
45 // creates exception blob at the end | |
46 // Using exception blob, this code is jumped from a compiled method. | |
47 // (see emit_exception_handler in sparc.ad file) | |
48 // | |
49 // Given an exception pc at a call we call into the runtime for the | |
50 // handler in this method. This handler might merely restore state | |
51 // (i.e. callee save registers) unwind the frame and jump to the | |
52 // exception handler for the nmethod if there is no Java level handler | |
53 // for the nmethod. | |
54 // | |
55 // This code is entered with a jmp. | |
56 // | |
57 // Arguments: | |
58 // O0: exception oop | |
59 // O1: exception pc | |
60 // | |
61 // Results: | |
62 // O0: exception oop | |
63 // O1: exception pc in caller or ??? | |
64 // destination: exception handler of caller | |
65 // | |
66 // Note: the exception pc MUST be at a call (precise debug information) | |
67 // | |
68 void OptoRuntime::generate_exception_blob() { | |
69 // allocate space for code | |
70 ResourceMark rm; | |
71 int pad = VerifyThread ? 256 : 0;// Extra slop space for more verify code | |
72 | |
73 // setup code generation tools | |
74 // Measured 8/7/03 at 256 in 32bit debug build (no VerifyThread) | |
75 // Measured 8/7/03 at 528 in 32bit debug build (VerifyThread) | |
76 CodeBuffer buffer("exception_blob", 600+pad, 512); | |
77 MacroAssembler* masm = new MacroAssembler(&buffer); | |
78 | |
79 int framesize_in_bytes = __ total_frame_size_in_bytes(0); | |
80 int framesize_in_words = framesize_in_bytes / wordSize; | |
81 int framesize_in_slots = framesize_in_bytes / sizeof(jint); | |
82 | |
83 Label L; | |
84 | |
85 int start = __ offset(); | |
86 | |
87 __ verify_thread(); | |
727 | 88 __ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset()); |
89 __ st_ptr(Oissuing_pc, G2_thread, JavaThread::exception_pc_offset()); | |
0 | 90 |
91 // This call does all the hard work. It checks if an exception catch | |
92 // exists in the method. | |
93 // If so, it returns the handler address. | |
94 // If the nmethod has been deoptimized and it had a handler the handler | |
95 // address is the deopt blob unpack_with_exception entry. | |
96 // | |
97 // If no handler exists it prepares for stack-unwinding, restoring the callee-save | |
98 // registers of the frame being removed. | |
99 // | |
100 __ save_frame(0); | |
101 | |
102 __ mov(G2_thread, O0); | |
103 __ set_last_Java_frame(SP, noreg); | |
104 __ save_thread(L7_thread_cache); | |
105 | |
106 // This call can block at exit and nmethod can be deoptimized at that | |
107 // point. If the nmethod had a catch point we would jump to the | |
108 // now deoptimized catch point and fall thru the vanilla deopt | |
109 // path and lose the exception | |
110 // Sure would be simpler if this call didn't block! | |
111 __ call(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C), relocInfo::runtime_call_type); | |
112 __ delayed()->mov(L7_thread_cache, O0); | |
113 | |
114 // Set an oopmap for the call site. This oopmap will only be used if we | |
115 // are unwinding the stack. Hence, all locations will be dead. | |
116 // Callee-saved registers will be the same as the frame above (i.e., | |
117 // handle_exception_stub), since they were restored when we got the | |
118 // exception. | |
119 | |
120 OopMapSet *oop_maps = new OopMapSet(); | |
121 oop_maps->add_gc_map( __ offset()-start, new OopMap(framesize_in_slots, 0)); | |
122 | |
123 __ bind(L); | |
124 __ restore_thread(L7_thread_cache); | |
125 __ reset_last_Java_frame(); | |
126 | |
127 __ mov(O0, G3_scratch); // Move handler address to temp | |
128 __ restore(); | |
129 | |
1567 | 130 // Restore SP from L7 if the exception PC is a MethodHandle call site. |
131 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), O7); | |
132 __ tst(O7); | |
133 __ movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); | |
134 | |
0 | 135 // G3_scratch contains handler address |
136 // Since this may be the deopt blob we must set O7 to look like we returned | |
137 // from the original pc that threw the exception | |
138 | |
727 | 139 __ ld_ptr(G2_thread, JavaThread::exception_pc_offset(), O7); |
0 | 140 __ sub(O7, frame::pc_return_offset, O7); |
141 | |
142 | |
143 assert(Assembler::is_simm13(in_bytes(JavaThread::exception_oop_offset())), "exception offset overflows simm13, following ld instruction cannot be in delay slot"); | |
727 | 144 __ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); // O0 |
0 | 145 #ifdef ASSERT |
727 | 146 __ st_ptr(G0, G2_thread, JavaThread::exception_handler_pc_offset()); |
147 __ st_ptr(G0, G2_thread, JavaThread::exception_pc_offset()); | |
0 | 148 #endif |
149 __ JMP(G3_scratch, 0); | |
150 // Clear the exception oop so GC no longer processes it as a root. | |
727 | 151 __ delayed()->st_ptr(G0, G2_thread, JavaThread::exception_oop_offset()); |
0 | 152 |
153 // ------------- | |
154 // make sure all code is generated | |
155 masm->flush(); | |
156 | |
157 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize_in_words); | |
158 } |