Mercurial > hg > graal-compiler
comparison src/cpu/ppc/vm/runtime_ppc.cpp @ 14445:67fa91961822
8029940: PPC64 (part 122): C2 compiler port
Reviewed-by: kvn
author | goetz |
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date | Wed, 11 Dec 2013 00:06:11 +0100 |
parents | |
children | e5e8aa897002 |
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14444:492e67693373 | 14445:67fa91961822 |
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1 /* | |
2 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2012, 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 #include "precompiled.hpp" | |
27 #ifdef COMPILER2 | |
28 #include "asm/assembler.inline.hpp" | |
29 #include "asm/macroAssembler.inline.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "code/vmreg.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "nativeInst_ppc.hpp" | |
34 #include "opto/runtime.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
36 #include "runtime/sharedRuntime.hpp" | |
37 #include "runtime/stubRoutines.hpp" | |
38 #include "runtime/vframeArray.hpp" | |
39 #include "utilities/globalDefinitions.hpp" | |
40 #include "vmreg_ppc.inline.hpp" | |
41 #endif | |
42 | |
43 #define __ masm-> | |
44 | |
45 | |
46 #ifdef COMPILER2 | |
47 | |
48 // SP adjustment (must use unextended SP) for method handle call sites | |
49 // during exception handling. | |
50 static intptr_t adjust_SP_for_methodhandle_callsite(JavaThread *thread) { | |
51 RegisterMap map(thread, false); | |
52 // The frame constructor will do the correction for us (see frame::adjust_unextended_SP). | |
53 frame mh_caller_frame = thread->last_frame().sender(&map); | |
54 assert(mh_caller_frame.is_compiled_frame(), "Only may reach here for compiled MH call sites"); | |
55 return (intptr_t) mh_caller_frame.unextended_sp(); | |
56 } | |
57 | |
58 //------------------------------generate_exception_blob--------------------------- | |
59 // Creates exception blob at the end. | |
60 // Using exception blob, this code is jumped from a compiled method. | |
61 // | |
62 // Given an exception pc at a call we call into the runtime for the | |
63 // handler in this method. This handler might merely restore state | |
64 // (i.e. callee save registers) unwind the frame and jump to the | |
65 // exception handler for the nmethod if there is no Java level handler | |
66 // for the nmethod. | |
67 // | |
68 // This code is entered with a jmp. | |
69 // | |
70 // Arguments: | |
71 // R3_ARG1: exception oop | |
72 // R4_ARG2: exception pc | |
73 // | |
74 // Results: | |
75 // R3_ARG1: exception oop | |
76 // R4_ARG2: exception pc in caller | |
77 // destination: exception handler of caller | |
78 // | |
79 // Note: the exception pc MUST be at a call (precise debug information) | |
80 // | |
81 void OptoRuntime::generate_exception_blob() { | |
82 // Allocate space for the code. | |
83 ResourceMark rm; | |
84 // Setup code generation tools. | |
85 CodeBuffer buffer("exception_blob", 2048, 1024); | |
86 InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer); | |
87 | |
88 address start = __ pc(); | |
89 | |
90 int frame_size_in_bytes = frame::abi_112_size; | |
91 OopMap* map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); | |
92 | |
93 // Exception pc is 'return address' for stack walker. | |
94 __ std(R4_ARG2/*exception pc*/, _abi(lr), R1_SP); | |
95 | |
96 // Store the exception in the Thread object. | |
97 __ std(R3_ARG1/*exception oop*/, in_bytes(JavaThread::exception_oop_offset()), R16_thread); | |
98 __ std(R4_ARG2/*exception pc*/, in_bytes(JavaThread::exception_pc_offset()), R16_thread); | |
99 | |
100 // Save callee-saved registers. | |
101 // Push a C frame for the exception blob. It is needed for the C call later on. | |
102 __ push_frame_abi112(0, R11_scratch1); | |
103 | |
104 // This call does all the hard work. It checks if an exception handler | |
105 // exists in the method. | |
106 // If so, it returns the handler address. | |
107 // If not, it prepares for stack-unwinding, restoring the callee-save | |
108 // registers of the frame being removed. | |
109 __ set_last_Java_frame(/*sp=*/R1_SP, noreg); | |
110 | |
111 __ mr(R3_ARG1, R16_thread); | |
112 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, OptoRuntime::handle_exception_C), | |
113 relocInfo::none); | |
114 address calls_return_pc = __ last_calls_return_pc(); | |
115 # ifdef ASSERT | |
116 __ cmpdi(CCR0, R3_RET, 0); | |
117 __ asm_assert_ne("handle_exception_C must not return NULL", 0x601); | |
118 # endif | |
119 | |
120 // Set an oopmap for the call site. This oopmap will only be used if we | |
121 // are unwinding the stack. Hence, all locations will be dead. | |
122 // Callee-saved registers will be the same as the frame above (i.e., | |
123 // handle_exception_stub), since they were restored when we got the | |
124 // exception. | |
125 OopMapSet* oop_maps = new OopMapSet(); | |
126 oop_maps->add_gc_map(calls_return_pc - start, map); | |
127 | |
128 // Get unextended_sp for method handle call sites. | |
129 Label mh_callsite, mh_done; // Use a 2nd c call if it's a method handle call site. | |
130 __ lwa(R4_ARG2, in_bytes(JavaThread::is_method_handle_return_offset()), R16_thread); | |
131 __ cmpwi(CCR0, R4_ARG2, 0); | |
132 __ bne(CCR0, mh_callsite); | |
133 | |
134 __ mtctr(R3_RET); // Move address of exception handler to SR_CTR. | |
135 __ reset_last_Java_frame(); | |
136 __ pop_frame(); | |
137 | |
138 __ bind(mh_done); | |
139 // We have a handler in register SR_CTR (could be deopt blob). | |
140 | |
141 // Get the exception oop. | |
142 __ ld(R3_ARG1, in_bytes(JavaThread::exception_oop_offset()), R16_thread); | |
143 | |
144 // Get the exception pc in case we are deoptimized. | |
145 __ ld(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread); | |
146 | |
147 // Reset thread values. | |
148 __ li(R0, 0); | |
149 #ifdef ASSERT | |
150 __ std(R0, in_bytes(JavaThread::exception_handler_pc_offset()), R16_thread); | |
151 __ std(R0, in_bytes(JavaThread::exception_pc_offset()), R16_thread); | |
152 #endif | |
153 // Clear the exception oop so GC no longer processes it as a root. | |
154 __ std(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread); | |
155 | |
156 // Move exception pc into SR_LR. | |
157 __ mtlr(R4_ARG2); | |
158 __ bctr(); | |
159 | |
160 | |
161 // Same as above, but also set sp to unextended_sp. | |
162 __ bind(mh_callsite); | |
163 __ mr(R31, R3_RET); // Save branch address. | |
164 __ mr(R3_ARG1, R16_thread); | |
165 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, adjust_SP_for_methodhandle_callsite), relocInfo::none); | |
166 // Returns unextended_sp in R3_RET. | |
167 | |
168 __ mtctr(R31); // Move address of exception handler to SR_CTR. | |
169 __ reset_last_Java_frame(); | |
170 | |
171 __ mr(R1_SP, R3_RET); // Set sp to unextended_sp. | |
172 __ b(mh_done); | |
173 | |
174 | |
175 // Make sure all code is generated. | |
176 masm->flush(); | |
177 | |
178 // Set exception blob. | |
179 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, | |
180 frame_size_in_bytes/wordSize); | |
181 } | |
182 | |
183 #endif // COMPILER2 |