svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_EXECUTION_H_ |
| 29 | #define V8_EXECUTION_H_ |
| 30 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 31 | #include "allocation.h" |
| 32 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 33 | namespace v8 { |
| 34 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | |
| 36 | |
| 37 | // Flag used to set the interrupt causes. |
| 38 | enum InterruptFlag { |
| 39 | INTERRUPT = 1 << 0, |
| 40 | DEBUGBREAK = 1 << 1, |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 41 | DEBUGCOMMAND = 1 << 2, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 42 | PREEMPT = 1 << 3, |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 43 | TERMINATE = 1 << 4, |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 44 | GC_REQUEST = 1 << 5, |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 45 | FULL_DEOPT = 1 << 6, |
| 46 | INSTALL_CODE = 1 << 7 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 47 | }; |
| 48 | |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 49 | |
| 50 | class Isolate; |
| 51 | |
| 52 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 53 | class Execution : public AllStatic { |
| 54 | public: |
| 55 | // Call a function, the caller supplies a receiver and an array |
| 56 | // of arguments. Arguments are Object* type. After function returns, |
| 57 | // pointers in 'args' might be invalid. |
| 58 | // |
| 59 | // *pending_exception tells whether the invoke resulted in |
| 60 | // a pending exception. |
| 61 | // |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 62 | // When convert_receiver is set, and the receiver is not an object, |
| 63 | // and the function called is not in strict mode, receiver is converted to |
| 64 | // an object. |
| 65 | // |
jkummerow@chromium.org | 2c9426b | 2013-09-05 16:31:13 +0000 | [diff] [blame] | 66 | static Handle<Object> Call(Isolate* isolate, |
| 67 | Handle<Object> callable, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 68 | Handle<Object> receiver, |
| 69 | int argc, |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 70 | Handle<Object> argv[], |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 71 | bool* pending_exception, |
| 72 | bool convert_receiver = false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 73 | |
| 74 | // Construct object from function, the caller supplies an array of |
| 75 | // arguments. Arguments are Object* type. After function returns, |
| 76 | // pointers in 'args' might be invalid. |
| 77 | // |
| 78 | // *pending_exception tells whether the invoke resulted in |
| 79 | // a pending exception. |
| 80 | // |
| 81 | static Handle<Object> New(Handle<JSFunction> func, |
| 82 | int argc, |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 83 | Handle<Object> argv[], |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 84 | bool* pending_exception); |
| 85 | |
| 86 | // Call a function, just like Call(), but make sure to silently catch |
| 87 | // any thrown exceptions. The return value is either the result of |
| 88 | // calling the function (if caught exception is false) or the exception |
| 89 | // that occurred (if caught exception is true). |
| 90 | static Handle<Object> TryCall(Handle<JSFunction> func, |
| 91 | Handle<Object> receiver, |
| 92 | int argc, |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 93 | Handle<Object> argv[], |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 94 | bool* caught_exception); |
| 95 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 96 | // ECMA-262 9.3 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 97 | static Handle<Object> ToNumber( |
| 98 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 99 | |
| 100 | // ECMA-262 9.4 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 101 | static Handle<Object> ToInteger( |
| 102 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 103 | |
| 104 | // ECMA-262 9.5 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 105 | static Handle<Object> ToInt32( |
| 106 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 107 | |
| 108 | // ECMA-262 9.6 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 109 | static Handle<Object> ToUint32( |
| 110 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 111 | |
| 112 | // ECMA-262 9.8 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 113 | static Handle<Object> ToString( |
| 114 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 115 | |
| 116 | // ECMA-262 9.8 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 117 | static Handle<Object> ToDetailString( |
| 118 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 119 | |
| 120 | // ECMA-262 9.9 |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 121 | static Handle<Object> ToObject( |
| 122 | Isolate* isolate, Handle<Object> obj, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 123 | |
| 124 | // Create a new date object from 'time'. |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 125 | static Handle<Object> NewDate( |
| 126 | Isolate* isolate, double time, bool* exc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 127 | |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 128 | // Create a new regular expression object from 'pattern' and 'flags'. |
| 129 | static Handle<JSRegExp> NewJSRegExp(Handle<String> pattern, |
| 130 | Handle<String> flags, |
| 131 | bool* exc); |
| 132 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 133 | // Used to implement [] notation on strings (calls JS code) |
| 134 | static Handle<Object> CharAt(Handle<String> str, uint32_t index); |
| 135 | |
| 136 | static Handle<Object> GetFunctionFor(); |
| 137 | static Handle<JSFunction> InstantiateFunction( |
| 138 | Handle<FunctionTemplateInfo> data, bool* exc); |
| 139 | static Handle<JSObject> InstantiateObject(Handle<ObjectTemplateInfo> data, |
| 140 | bool* exc); |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 141 | static void ConfigureInstance(Isolate* isolate, |
| 142 | Handle<Object> instance, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 143 | Handle<Object> data, |
| 144 | bool* exc); |
| 145 | static Handle<String> GetStackTraceLine(Handle<Object> recv, |
| 146 | Handle<JSFunction> fun, |
| 147 | Handle<Object> pos, |
| 148 | Handle<Object> is_global); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 149 | #ifdef ENABLE_DEBUGGER_SUPPORT |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 150 | static Object* DebugBreakHelper(Isolate* isolate); |
| 151 | static void ProcessDebugMessages(Isolate* isolate, bool debug_command_only); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 152 | #endif |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 153 | |
| 154 | // If the stack guard is triggered, but it is not an actual |
| 155 | // stack overflow, then handle the interruption accordingly. |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 156 | MUST_USE_RESULT static MaybeObject* HandleStackGuardInterrupt( |
| 157 | Isolate* isolate); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 158 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 159 | // Get a function delegate (or undefined) for the given non-function |
| 160 | // object. Used for support calling objects as functions. |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 161 | static Handle<Object> GetFunctionDelegate(Isolate* isolate, |
| 162 | Handle<Object> object); |
| 163 | static Handle<Object> TryGetFunctionDelegate(Isolate* isolate, |
| 164 | Handle<Object> object, |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 165 | bool* has_pending_exception); |
sgjesse@chromium.org | 05521fc | 2009-05-21 07:37:44 +0000 | [diff] [blame] | 166 | |
| 167 | // Get a function delegate (or undefined) for the given non-function |
| 168 | // object. Used for support calling objects as constructors. |
mstarzinger@chromium.org | e900018 | 2013-09-03 11:25:39 +0000 | [diff] [blame] | 169 | static Handle<Object> GetConstructorDelegate(Isolate* isolate, |
| 170 | Handle<Object> object); |
| 171 | static Handle<Object> TryGetConstructorDelegate(Isolate* isolate, |
| 172 | Handle<Object> object, |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 173 | bool* has_pending_exception); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 174 | }; |
| 175 | |
| 176 | |
| 177 | class ExecutionAccess; |
| 178 | |
| 179 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 180 | // StackGuard contains the handling of the limits that are used to limit the |
| 181 | // number of nested invocations of JavaScript and the stack size used in each |
| 182 | // invocation. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 183 | class StackGuard { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 184 | public: |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 185 | // Pass the address beyond which the stack should not grow. The stack |
| 186 | // is assumed to grow downwards. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 187 | void SetStackLimit(uintptr_t limit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 188 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 189 | // Threading support. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 190 | char* ArchiveStackGuard(char* to); |
| 191 | char* RestoreStackGuard(char* from); |
| 192 | static int ArchiveSpacePerThread() { return sizeof(ThreadLocal); } |
| 193 | void FreeThreadResources(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 194 | // Sets up the default stack guard for this thread if it has not |
| 195 | // already been set up. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 196 | void InitThread(const ExecutionAccess& lock); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 197 | // Clears the stack guard for this thread so it does not look as if |
| 198 | // it has been set up. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 199 | void ClearThread(const ExecutionAccess& lock); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 200 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 201 | bool IsStackOverflow(); |
| 202 | bool IsPreempted(); |
| 203 | void Preempt(); |
| 204 | bool IsInterrupted(); |
| 205 | void Interrupt(); |
| 206 | bool IsTerminateExecution(); |
| 207 | void TerminateExecution(); |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 208 | void CancelTerminateExecution(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 209 | #ifdef ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 210 | bool IsDebugBreak(); |
| 211 | void DebugBreak(); |
| 212 | bool IsDebugCommand(); |
| 213 | void DebugCommand(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 214 | #endif |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 215 | bool IsGCRequest(); |
| 216 | void RequestGC(); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 217 | bool IsInstallCodeRequest(); |
| 218 | void RequestInstallCode(); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 219 | bool IsFullDeopt(); |
| 220 | void FullDeopt(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 221 | void Continue(InterruptFlag after_what); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 222 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 223 | // This provides an asynchronous read of the stack limits for the current |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 224 | // thread. There are no locks protecting this, but it is assumed that you |
| 225 | // have the global V8 lock if you are using multiple V8 threads. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 226 | uintptr_t climit() { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 227 | return thread_local_.climit_; |
| 228 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 229 | uintptr_t real_climit() { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 230 | return thread_local_.real_climit_; |
| 231 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 232 | uintptr_t jslimit() { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 233 | return thread_local_.jslimit_; |
| 234 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 235 | uintptr_t real_jslimit() { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 236 | return thread_local_.real_jslimit_; |
| 237 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 238 | Address address_of_jslimit() { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 239 | return reinterpret_cast<Address>(&thread_local_.jslimit_); |
| 240 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 241 | Address address_of_real_jslimit() { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 242 | return reinterpret_cast<Address>(&thread_local_.real_jslimit_); |
| 243 | } |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 244 | bool ShouldPostponeInterrupts(); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 245 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 246 | private: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 247 | StackGuard(); |
| 248 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 249 | // You should hold the ExecutionAccess lock when calling this method. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 250 | bool has_pending_interrupts(const ExecutionAccess& lock) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 251 | // Sanity check: We shouldn't be asking about pending interrupts |
| 252 | // unless we're not postponing them anymore. |
| 253 | ASSERT(!should_postpone_interrupts(lock)); |
| 254 | return thread_local_.interrupt_flags_ != 0; |
| 255 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 256 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 257 | // You should hold the ExecutionAccess lock when calling this method. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 258 | bool should_postpone_interrupts(const ExecutionAccess& lock) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 259 | return thread_local_.postpone_interrupts_nesting_ > 0; |
| 260 | } |
| 261 | |
| 262 | // You should hold the ExecutionAccess lock when calling this method. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 263 | inline void set_interrupt_limits(const ExecutionAccess& lock); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 264 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 265 | // Reset limits to actual values. For example after handling interrupt. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 266 | // You should hold the ExecutionAccess lock when calling this method. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 267 | inline void reset_limits(const ExecutionAccess& lock); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 268 | |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 269 | // Enable or disable interrupts. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 270 | void EnableInterrupts(); |
| 271 | void DisableInterrupts(); |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 272 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 273 | #if V8_TARGET_ARCH_X64 |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 274 | static const uintptr_t kInterruptLimit = V8_UINT64_C(0xfffffffffffffffe); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 275 | static const uintptr_t kIllegalLimit = V8_UINT64_C(0xfffffffffffffff8); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 276 | #else |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 277 | static const uintptr_t kInterruptLimit = 0xfffffffe; |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 278 | static const uintptr_t kIllegalLimit = 0xfffffff8; |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 279 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 280 | |
| 281 | class ThreadLocal { |
| 282 | public: |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 283 | ThreadLocal() { Clear(); } |
| 284 | // You should hold the ExecutionAccess lock when you call Initialize or |
| 285 | // Clear. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 286 | void Clear(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 287 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 288 | // Returns true if the heap's stack limits should be set, false if not. |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 289 | bool Initialize(Isolate* isolate); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 290 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 291 | // The stack limit is split into a JavaScript and a C++ stack limit. These |
| 292 | // two are the same except when running on a simulator where the C++ and |
| 293 | // JavaScript stacks are separate. Each of the two stack limits have two |
| 294 | // values. The one eith the real_ prefix is the actual stack limit |
| 295 | // set for the VM. The one without the real_ prefix has the same value as |
| 296 | // the actual stack limit except when there is an interruption (e.g. debug |
| 297 | // break or preemption) in which case it is lowered to make stack checks |
| 298 | // fail. Both the generated code and the runtime system check against the |
| 299 | // one without the real_ prefix. |
| 300 | uintptr_t real_jslimit_; // Actual JavaScript stack limit set for the VM. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 301 | uintptr_t jslimit_; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 302 | uintptr_t real_climit_; // Actual C++ stack limit set for the VM. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 303 | uintptr_t climit_; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 304 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 305 | int nesting_; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 306 | int postpone_interrupts_nesting_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 307 | int interrupt_flags_; |
| 308 | }; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 309 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 310 | // TODO(isolates): Technically this could be calculated directly from a |
| 311 | // pointer to StackGuard. |
| 312 | Isolate* isolate_; |
| 313 | ThreadLocal thread_local_; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 314 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 315 | friend class Isolate; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 316 | friend class StackLimitCheck; |
kasper.lund | 4451067 | 2008-07-25 07:37:58 +0000 | [diff] [blame] | 317 | friend class PostponeInterruptsScope; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 318 | |
| 319 | DISALLOW_COPY_AND_ASSIGN(StackGuard); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 320 | }; |
| 321 | |
| 322 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 323 | } } // namespace v8::internal |
| 324 | |
| 325 | #endif // V8_EXECUTION_H_ |