Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/exceptions.hpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
| author | twisti |
|---|---|
| date | Tue, 11 Mar 2014 18:45:59 -0700 |
| parents | 5a9afbf72714 febc6428bc79 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2014, 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 #ifndef SHARE_VM_UTILITIES_EXCEPTIONS_HPP |
| 26 #define SHARE_VM_UTILITIES_EXCEPTIONS_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "oops/oopsHierarchy.hpp" | |
| 30 #include "utilities/sizes.hpp" | |
| 31 | |
| 0 | 32 // This file provides the basic support for exception handling in the VM. |
| 33 // Note: We do not use C++ exceptions to avoid compiler dependencies and | |
| 34 // unpredictable performance. | |
| 35 // | |
| 36 // Scheme: Exceptions are stored with the thread. There is never more | |
| 37 // than one pending exception per thread. All functions that can throw | |
| 38 // an exception carry a THREAD argument (usually the last argument and | |
| 39 // declared with the TRAPS macro). Throwing an exception means setting | |
| 40 // a pending exception in the thread. Upon return from a function that | |
| 41 // can throw an exception, we must check if an exception is pending. | |
| 42 // The CHECK macros do this in a convenient way. Carrying around the | |
| 43 // thread provides also convenient access to it (e.g. for Handle | |
| 44 // creation, w/o the need for recomputation). | |
| 45 | |
| 46 | |
| 47 | |
| 48 // Forward declarations to be independent of the include structure. | |
| 49 // This allows us to have exceptions.hpp included in top.hpp. | |
| 50 | |
| 51 class Thread; | |
| 52 class Handle; | |
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53 class Symbol; |
| 0 | 54 class JavaCallArguments; |
| 55 | |
| 56 // The ThreadShadow class is a helper class to access the _pending_exception | |
| 57 // field of the Thread class w/o having access to the Thread's interface (for | |
| 58 // include hierachy reasons). | |
| 59 | |
| 6197 | 60 class ThreadShadow: public CHeapObj<mtThread> { |
| 3939 | 61 friend class VMStructs; |
| 62 | |
| 0 | 63 protected: |
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64 #ifdef GRAAL |
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65 int _pending_deoptimization; |
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66 oop _pending_failed_speculation; |
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67 bool _pending_monitorenter; |
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68 #endif |
| 0 | 69 oop _pending_exception; // Thread has gc actions. |
| 70 const char* _exception_file; // file information for exception (debugging only) | |
| 71 int _exception_line; // line information for exception (debugging only) | |
| 72 friend void check_ThreadShadow(); // checks _pending_exception offset | |
| 73 | |
| 74 // The following virtual exists only to force creation of a vtable. | |
| 75 // We need ThreadShadow to have a vtable, even in product builds, | |
| 76 // so that its layout will start at an offset of zero relative to Thread. | |
| 77 // Some C++ compilers are so "clever" that they put the ThreadShadow | |
| 78 // base class at offset 4 in Thread (after Thread's vtable), if they | |
| 79 // notice that Thread has a vtable but ThreadShadow does not. | |
| 80 virtual void unused_initial_virtual() { } | |
| 81 | |
| 82 public: | |
| 83 oop pending_exception() const { return _pending_exception; } | |
| 84 bool has_pending_exception() const { return _pending_exception != NULL; } | |
| 85 const char* exception_file() const { return _exception_file; } | |
| 86 int exception_line() const { return _exception_line; } | |
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87 #ifdef GRAAL |
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88 int pending_deoptimization() const { return _pending_deoptimization; } |
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89 oop pending_failed_speculation() const { return _pending_failed_speculation; } |
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90 bool has_pending_monitorenter() const { return _pending_monitorenter; } |
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91 #endif |
| 0 | 92 |
| 93 // Code generation support | |
| 94 static ByteSize pending_exception_offset() { return byte_offset_of(ThreadShadow, _pending_exception); } | |
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95 #ifdef GRAAL |
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96 static ByteSize pending_deoptimization_offset() { return byte_offset_of(ThreadShadow, _pending_deoptimization); } |
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97 static ByteSize pending_monitorenter_offset() { return byte_offset_of(ThreadShadow, _pending_monitorenter); } |
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98 static ByteSize pending_failed_speculation_offset() { return byte_offset_of(ThreadShadow, _pending_failed_speculation); } |
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99 |
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100 void set_pending_monitorenter(bool b) { _pending_monitorenter = b; } |
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101 void set_pending_deoptimization(int reason) { _pending_deoptimization = reason; } |
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102 void set_pending_failed_speculation(oop failed_speculation) { _pending_failed_speculation = failed_speculation; } |
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103 #endif |
| 0 | 104 |
| 105 // use THROW whenever possible! | |
| 106 void set_pending_exception(oop exception, const char* file, int line); | |
| 107 | |
| 108 // use CLEAR_PENDING_EXCEPTION whenever possible! | |
| 109 void clear_pending_exception(); | |
| 110 | |
| 111 ThreadShadow() : _pending_exception(NULL), | |
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112 _exception_file(NULL), _exception_line(0) |
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113 #ifdef GRAAL |
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114 , _pending_monitorenter(false), _pending_deoptimization(-1), _pending_failed_speculation(NULL) |
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115 #endif |
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116 {} |
| 0 | 117 }; |
| 118 | |
| 119 | |
| 120 // Exceptions is a helper class that encapsulates all operations | |
| 121 // that require access to the thread interface and which are | |
| 122 // relatively rare. The Exceptions operations should only be | |
| 123 // used directly if the macros below are insufficient. | |
| 124 | |
| 125 class Exceptions { | |
| 126 static bool special_exception(Thread *thread, const char* file, int line, Handle exception); | |
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127 static bool special_exception(Thread* thread, const char* file, int line, Symbol* name, const char* message); |
| 0 | 128 public: |
| 129 // this enum is defined to indicate whether it is safe to | |
| 130 // ignore the encoding scheme of the original message string. | |
| 131 typedef enum { | |
| 132 safe_to_utf8 = 0, | |
| 133 unsafe_to_utf8 = 1 | |
| 134 } ExceptionMsgToUtf8Mode; | |
| 135 // Throw exceptions: w/o message, w/ message & with formatted message. | |
| 136 static void _throw_oop(Thread* thread, const char* file, int line, oop exception); | |
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137 static void _throw(Thread* thread, const char* file, int line, Handle exception, const char* msg = NULL); |
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138 |
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139 static void _throw_msg(Thread* thread, const char* file, int line, Symbol* name, const char* message); |
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140 static void _throw_msg(Thread* thread, const char* file, int line, Symbol* name, const char* message, |
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141 Handle loader, Handle protection_domain); |
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142 |
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143 static void _throw_msg_cause(Thread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause); |
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144 static void _throw_msg_cause(Thread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause, |
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145 Handle h_loader, Handle h_protection_domain); |
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146 |
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147 static void _throw_cause(Thread* thread, const char* file, int line, Symbol* name, Handle h_cause); |
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148 static void _throw_cause(Thread* thread, const char* file, int line, Symbol* name, Handle h_cause, |
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149 Handle h_loader, Handle h_protection_domain); |
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150 |
| 0 | 151 static void _throw_args(Thread* thread, const char* file, int line, |
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152 Symbol* name, Symbol* signature, |
| 0 | 153 JavaCallArguments* args); |
| 154 | |
| 155 // There is no THROW... macro for this method. Caller should remember | |
| 156 // to do a return after calling it. | |
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157 static void fthrow(Thread* thread, const char* file, int line, Symbol* name, |
| 0 | 158 const char* format, ...); |
| 159 | |
| 160 // Create and initialize a new exception | |
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161 static Handle new_exception(Thread* thread, Symbol* name, |
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162 Symbol* signature, JavaCallArguments* args, |
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163 Handle loader, Handle protection_domain); |
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164 |
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165 static Handle new_exception(Thread* thread, Symbol* name, |
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166 Symbol* signature, JavaCallArguments* args, |
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167 Handle cause, |
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168 Handle loader, Handle protection_domain); |
| 0 | 169 |
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170 static Handle new_exception(Thread* thread, Symbol* name, |
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171 Handle cause, |
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172 Handle loader, Handle protection_domain, |
| 0 | 173 ExceptionMsgToUtf8Mode to_utf8_safe = safe_to_utf8); |
| 174 | |
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175 static Handle new_exception(Thread* thread, Symbol* name, |
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176 const char* message, Handle cause, |
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177 Handle loader, Handle protection_domain, |
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178 ExceptionMsgToUtf8Mode to_utf8_safe = safe_to_utf8); |
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179 |
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180 static Handle new_exception(Thread* thread, Symbol* name, |
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181 const char* message, |
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182 ExceptionMsgToUtf8Mode to_utf8_safe = safe_to_utf8); |
| 0 | 183 |
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184 static void throw_stack_overflow_exception(Thread* thread, const char* file, int line, methodHandle method); |
| 0 | 185 |
| 186 // for AbortVMOnException flag | |
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187 NOT_PRODUCT(static void debug_check_abort(Handle exception, const char* message = NULL);) |
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188 NOT_PRODUCT(static void debug_check_abort(const char *value_string, const char* message = NULL);) |
| 0 | 189 }; |
| 190 | |
| 191 | |
| 192 // The THREAD & TRAPS macros facilitate the declaration of functions that throw exceptions. | |
| 193 // Convention: Use the TRAPS macro as the last argument of such a function; e.g.: | |
| 194 // | |
| 195 // int this_function_may_trap(int x, float y, TRAPS) | |
| 196 | |
| 197 #define THREAD __the_thread__ | |
| 198 #define TRAPS Thread* THREAD | |
| 199 | |
| 200 | |
| 201 // The CHECK... macros should be used to pass along a THREAD reference and to check for pending | |
| 202 // exceptions. In special situations it is necessary to handle pending exceptions explicitly, | |
| 203 // in these cases the PENDING_EXCEPTION helper macros should be used. | |
| 204 // | |
| 205 // Macro naming conventions: Macros that end with _ require a result value to be returned. They | |
| 206 // are for functions with non-void result type. The result value is usually ignored because of | |
| 207 // the exception and is only needed for syntactic correctness. The _0 ending is a shortcut for | |
| 208 // _(0) since this is a frequent case. Example: | |
| 209 // | |
| 210 // int result = this_function_may_trap(x_arg, y_arg, CHECK_0); | |
| 211 // | |
| 212 // CAUTION: make sure that the function call using a CHECK macro is not the only statement of a | |
| 213 // conditional branch w/o enclosing {} braces, since the CHECK macros expand into several state- | |
| 214 // ments! | |
| 215 | |
| 216 #define PENDING_EXCEPTION (((ThreadShadow*)THREAD)->pending_exception()) | |
| 217 #define HAS_PENDING_EXCEPTION (((ThreadShadow*)THREAD)->has_pending_exception()) | |
| 218 #define CLEAR_PENDING_EXCEPTION (((ThreadShadow*)THREAD)->clear_pending_exception()) | |
| 219 | |
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220 #define CHECK THREAD); if (HAS_PENDING_EXCEPTION) return ; (void)(0 |
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221 #define CHECK_(result) THREAD); if (HAS_PENDING_EXCEPTION) return result; (void)(0 |
| 0 | 222 #define CHECK_0 CHECK_(0) |
| 223 #define CHECK_NH CHECK_(Handle()) | |
| 224 #define CHECK_NULL CHECK_(NULL) | |
| 225 #define CHECK_false CHECK_(false) | |
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226 #define CHECK_JNI_ERR CHECK_(JNI_ERR) |
| 0 | 227 |
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228 #define CHECK_AND_CLEAR THREAD); if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; return; } (void)(0 |
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229 #define CHECK_AND_CLEAR_(result) THREAD); if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; return result; } (void)(0 |
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230 #define CHECK_AND_CLEAR_0 CHECK_AND_CLEAR_(0) |
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231 #define CHECK_AND_CLEAR_NH CHECK_AND_CLEAR_(Handle()) |
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232 #define CHECK_AND_CLEAR_NULL CHECK_AND_CLEAR_(NULL) |
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233 #define CHECK_AND_CLEAR_false CHECK_AND_CLEAR_(false) |
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234 |
| 0 | 235 // The THROW... macros should be used to throw an exception. They require a THREAD variable to be |
| 236 // visible within the scope containing the THROW. Usually this is achieved by declaring the function | |
| 237 // with a TRAPS argument. | |
| 238 | |
| 239 #define THREAD_AND_LOCATION THREAD, __FILE__, __LINE__ | |
| 240 | |
| 241 #define THROW_OOP(e) \ | |
| 242 { Exceptions::_throw_oop(THREAD_AND_LOCATION, e); return; } | |
| 243 | |
| 244 #define THROW_HANDLE(e) \ | |
| 245 { Exceptions::_throw(THREAD_AND_LOCATION, e); return; } | |
| 246 | |
| 247 #define THROW(name) \ | |
| 248 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, NULL); return; } | |
| 249 | |
| 250 #define THROW_MSG(name, message) \ | |
| 251 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, message); return; } | |
| 252 | |
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253 #define THROW_CAUSE(name, cause) \ |
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254 { Exceptions::_throw_cause(THREAD_AND_LOCATION, name, cause); return; } |
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255 |
| 0 | 256 #define THROW_MSG_LOADER(name, message, loader, protection_domain) \ |
| 257 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, message, loader, protection_domain); return; } | |
| 258 | |
| 259 #define THROW_ARG(name, signature, args) \ | |
| 260 { Exceptions::_throw_args(THREAD_AND_LOCATION, name, signature, args); return; } | |
| 261 | |
| 262 #define THROW_OOP_(e, result) \ | |
| 263 { Exceptions::_throw_oop(THREAD_AND_LOCATION, e); return result; } | |
| 264 | |
| 265 #define THROW_HANDLE_(e, result) \ | |
| 266 { Exceptions::_throw(THREAD_AND_LOCATION, e); return result; } | |
| 267 | |
| 268 #define THROW_(name, result) \ | |
| 269 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, NULL); return result; } | |
| 270 | |
| 271 #define THROW_MSG_(name, message, result) \ | |
| 272 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, message); return result; } | |
| 273 | |
| 274 #define THROW_MSG_LOADER_(name, message, loader, protection_domain, result) \ | |
| 275 { Exceptions::_throw_msg(THREAD_AND_LOCATION, name, message, loader, protection_domain); return result; } | |
| 276 | |
| 277 #define THROW_ARG_(name, signature, args, result) \ | |
| 278 { Exceptions::_throw_args(THREAD_AND_LOCATION, name, signature, args); return result; } | |
| 279 | |
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280 #define THROW_MSG_CAUSE(name, message, cause) \ |
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281 { Exceptions::_throw_msg_cause(THREAD_AND_LOCATION, name, message, cause); return; } |
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282 |
| 0 | 283 #define THROW_MSG_CAUSE_(name, message, cause, result) \ |
| 284 { Exceptions::_throw_msg_cause(THREAD_AND_LOCATION, name, message, cause); return result; } | |
| 285 | |
| 286 | |
| 287 #define THROW_OOP_0(e) THROW_OOP_(e, 0) | |
| 288 #define THROW_HANDLE_0(e) THROW_HANDLE_(e, 0) | |
| 289 #define THROW_0(name) THROW_(name, 0) | |
| 290 #define THROW_MSG_0(name, message) THROW_MSG_(name, message, 0) | |
| 291 #define THROW_WRAPPED_0(name, oop_to_wrap) THROW_WRAPPED_(name, oop_to_wrap, 0) | |
| 292 #define THROW_ARG_0(name, signature, arg) THROW_ARG_(name, signature, arg, 0) | |
| 293 #define THROW_MSG_CAUSE_0(name, message, cause) THROW_MSG_CAUSE_(name, message, cause, 0) | |
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294 #define THROW_MSG_CAUSE_NULL(name, message, cause) THROW_MSG_CAUSE_(name, message, cause, NULL) |
| 0 | 295 |
| 710 | 296 #define THROW_NULL(name) THROW_(name, NULL) |
| 297 #define THROW_MSG_NULL(name, message) THROW_MSG_(name, message, NULL) | |
| 298 | |
| 0 | 299 // The CATCH macro checks that no exception has been thrown by a function; it is used at |
| 300 // call sites about which is statically known that the callee cannot throw an exception | |
| 301 // even though it is declared with TRAPS. | |
| 302 | |
| 303 #define CATCH \ | |
| 304 THREAD); if (HAS_PENDING_EXCEPTION) { \ | |
| 305 oop ex = PENDING_EXCEPTION; \ | |
| 306 CLEAR_PENDING_EXCEPTION; \ | |
| 307 ex->print(); \ | |
| 308 ShouldNotReachHere(); \ | |
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309 } (void)(0 |
| 0 | 310 |
| 311 // ExceptionMark is a stack-allocated helper class for local exception handling. | |
| 312 // It is used with the EXCEPTION_MARK macro. | |
| 313 | |
| 314 class ExceptionMark { | |
| 315 private: | |
| 316 Thread* _thread; | |
| 317 | |
| 318 public: | |
| 319 ExceptionMark(Thread*& thread); | |
| 320 ~ExceptionMark(); | |
| 321 }; | |
| 322 | |
| 323 | |
| 324 | |
| 325 // Use an EXCEPTION_MARK for 'local' exceptions. EXCEPTION_MARK makes sure that no | |
| 326 // pending exception exists upon entering its scope and tests that no pending exception | |
| 327 // exists when leaving the scope. | |
| 328 | |
| 329 // See also preserveException.hpp for PRESERVE_EXCEPTION_MARK macro, | |
| 330 // which preserves pre-existing exceptions and does not allow new | |
| 331 // exceptions. | |
| 332 | |
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333 #define EXCEPTION_MARK Thread* THREAD = NULL; ExceptionMark __em(THREAD); |
| 1972 | 334 |
| 335 #endif // SHARE_VM_UTILITIES_EXCEPTIONS_HPP |