Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/v8.h" |
| 6 | |
| 7 | #include "src/arguments.h" |
| 8 | #include "src/bootstrapper.h" |
| 9 | #include "src/debug.h" |
| 10 | #include "src/runtime/runtime-utils.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | RUNTIME_FUNCTION(Runtime_CheckIsBootstrapping) { |
| 16 | SealHandleScope shs(isolate); |
| 17 | DCHECK(args.length() == 0); |
| 18 | RUNTIME_ASSERT(isolate->bootstrapper()->IsActive()); |
| 19 | return isolate->heap()->undefined_value(); |
| 20 | } |
| 21 | |
| 22 | |
| 23 | RUNTIME_FUNCTION(Runtime_Throw) { |
| 24 | HandleScope scope(isolate); |
| 25 | DCHECK(args.length() == 1); |
| 26 | |
| 27 | return isolate->Throw(args[0]); |
| 28 | } |
| 29 | |
| 30 | |
| 31 | RUNTIME_FUNCTION(Runtime_ReThrow) { |
| 32 | HandleScope scope(isolate); |
| 33 | DCHECK(args.length() == 1); |
| 34 | |
| 35 | return isolate->ReThrow(args[0]); |
| 36 | } |
| 37 | |
| 38 | |
| 39 | RUNTIME_FUNCTION(Runtime_PromoteScheduledException) { |
| 40 | SealHandleScope shs(isolate); |
| 41 | DCHECK(args.length() == 0); |
| 42 | return isolate->PromoteScheduledException(); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | RUNTIME_FUNCTION(Runtime_ThrowReferenceError) { |
| 47 | HandleScope scope(isolate); |
| 48 | DCHECK(args.length() == 1); |
| 49 | CONVERT_ARG_HANDLE_CHECKED(Object, name, 0); |
| 50 | THROW_NEW_ERROR_RETURN_FAILURE( |
| 51 | isolate, NewReferenceError("not_defined", HandleVector(&name, 1))); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | RUNTIME_FUNCTION(Runtime_PromiseRejectEvent) { |
| 56 | DCHECK(args.length() == 3); |
| 57 | HandleScope scope(isolate); |
| 58 | CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0); |
| 59 | CONVERT_ARG_HANDLE_CHECKED(Object, value, 1); |
| 60 | CONVERT_BOOLEAN_ARG_CHECKED(debug_event, 2); |
| 61 | if (debug_event) isolate->debug()->OnPromiseReject(promise, value); |
| 62 | Handle<Symbol> key = isolate->factory()->promise_has_handler_symbol(); |
| 63 | // Do not report if we actually have a handler. |
| 64 | if (JSObject::GetDataProperty(promise, key)->IsUndefined()) { |
| 65 | isolate->ReportPromiseReject(promise, value, |
| 66 | v8::kPromiseRejectWithNoHandler); |
| 67 | } |
| 68 | return isolate->heap()->undefined_value(); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | RUNTIME_FUNCTION(Runtime_PromiseRevokeReject) { |
| 73 | DCHECK(args.length() == 1); |
| 74 | HandleScope scope(isolate); |
| 75 | CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0); |
| 76 | Handle<Symbol> key = isolate->factory()->promise_has_handler_symbol(); |
| 77 | // At this point, no revocation has been issued before |
| 78 | RUNTIME_ASSERT(JSObject::GetDataProperty(promise, key)->IsUndefined()); |
| 79 | isolate->ReportPromiseReject(promise, Handle<Object>(), |
| 80 | v8::kPromiseHandlerAddedAfterReject); |
| 81 | return isolate->heap()->undefined_value(); |
| 82 | } |
| 83 | |
| 84 | |
| 85 | RUNTIME_FUNCTION(Runtime_PromiseHasHandlerSymbol) { |
| 86 | DCHECK(args.length() == 0); |
| 87 | return isolate->heap()->promise_has_handler_symbol(); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | RUNTIME_FUNCTION(Runtime_StackGuard) { |
| 92 | SealHandleScope shs(isolate); |
| 93 | DCHECK(args.length() == 0); |
| 94 | |
| 95 | // First check if this is a real stack overflow. |
| 96 | StackLimitCheck check(isolate); |
| 97 | if (check.JsHasOverflowed()) { |
| 98 | return isolate->StackOverflow(); |
| 99 | } |
| 100 | |
| 101 | return isolate->stack_guard()->HandleInterrupts(); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | RUNTIME_FUNCTION(Runtime_Interrupt) { |
| 106 | SealHandleScope shs(isolate); |
| 107 | DCHECK(args.length() == 0); |
| 108 | return isolate->stack_guard()->HandleInterrupts(); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | RUNTIME_FUNCTION(Runtime_AllocateInNewSpace) { |
| 113 | HandleScope scope(isolate); |
| 114 | DCHECK(args.length() == 1); |
| 115 | CONVERT_SMI_ARG_CHECKED(size, 0); |
| 116 | RUNTIME_ASSERT(IsAligned(size, kPointerSize)); |
| 117 | RUNTIME_ASSERT(size > 0); |
| 118 | RUNTIME_ASSERT(size <= Page::kMaxRegularHeapObjectSize); |
| 119 | return *isolate->factory()->NewFillerObject(size, false, NEW_SPACE); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | RUNTIME_FUNCTION(Runtime_AllocateInTargetSpace) { |
| 124 | HandleScope scope(isolate); |
| 125 | DCHECK(args.length() == 2); |
| 126 | CONVERT_SMI_ARG_CHECKED(size, 0); |
| 127 | CONVERT_SMI_ARG_CHECKED(flags, 1); |
| 128 | RUNTIME_ASSERT(IsAligned(size, kPointerSize)); |
| 129 | RUNTIME_ASSERT(size > 0); |
| 130 | RUNTIME_ASSERT(size <= Page::kMaxRegularHeapObjectSize); |
| 131 | bool double_align = AllocateDoubleAlignFlag::decode(flags); |
| 132 | AllocationSpace space = AllocateTargetSpace::decode(flags); |
| 133 | return *isolate->factory()->NewFillerObject(size, double_align, space); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | // Collect the raw data for a stack trace. Returns an array of 4 |
| 138 | // element segments each containing a receiver, function, code and |
| 139 | // native code offset. |
| 140 | RUNTIME_FUNCTION(Runtime_CollectStackTrace) { |
| 141 | HandleScope scope(isolate); |
| 142 | DCHECK(args.length() == 2); |
| 143 | CONVERT_ARG_HANDLE_CHECKED(JSObject, error_object, 0); |
| 144 | CONVERT_ARG_HANDLE_CHECKED(Object, caller, 1); |
| 145 | |
| 146 | if (!isolate->bootstrapper()->IsActive()) { |
| 147 | // Optionally capture a more detailed stack trace for the message. |
| 148 | isolate->CaptureAndSetDetailedStackTrace(error_object); |
| 149 | // Capture a simple stack trace for the stack property. |
| 150 | isolate->CaptureAndSetSimpleStackTrace(error_object, caller); |
| 151 | } |
| 152 | return isolate->heap()->undefined_value(); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | RUNTIME_FUNCTION(Runtime_GetFromCache) { |
| 157 | SealHandleScope shs(isolate); |
| 158 | // This is only called from codegen, so checks might be more lax. |
| 159 | CONVERT_ARG_CHECKED(JSFunctionResultCache, cache, 0); |
| 160 | CONVERT_ARG_CHECKED(Object, key, 1); |
| 161 | |
| 162 | { |
| 163 | DisallowHeapAllocation no_alloc; |
| 164 | |
| 165 | int finger_index = cache->finger_index(); |
| 166 | Object* o = cache->get(finger_index); |
| 167 | if (o == key) { |
| 168 | // The fastest case: hit the same place again. |
| 169 | return cache->get(finger_index + 1); |
| 170 | } |
| 171 | |
| 172 | for (int i = finger_index - 2; i >= JSFunctionResultCache::kEntriesIndex; |
| 173 | i -= 2) { |
| 174 | o = cache->get(i); |
| 175 | if (o == key) { |
| 176 | cache->set_finger_index(i); |
| 177 | return cache->get(i + 1); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | int size = cache->size(); |
| 182 | DCHECK(size <= cache->length()); |
| 183 | |
| 184 | for (int i = size - 2; i > finger_index; i -= 2) { |
| 185 | o = cache->get(i); |
| 186 | if (o == key) { |
| 187 | cache->set_finger_index(i); |
| 188 | return cache->get(i + 1); |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | // There is no value in the cache. Invoke the function and cache result. |
| 194 | HandleScope scope(isolate); |
| 195 | |
| 196 | Handle<JSFunctionResultCache> cache_handle(cache); |
| 197 | Handle<Object> key_handle(key, isolate); |
| 198 | Handle<Object> value; |
| 199 | { |
| 200 | Handle<JSFunction> factory(JSFunction::cast( |
| 201 | cache_handle->get(JSFunctionResultCache::kFactoryIndex))); |
| 202 | // TODO(antonm): consider passing a receiver when constructing a cache. |
| 203 | Handle<JSObject> receiver(isolate->global_proxy()); |
| 204 | // This handle is nor shared, nor used later, so it's safe. |
| 205 | Handle<Object> argv[] = {key_handle}; |
| 206 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 207 | isolate, value, |
| 208 | Execution::Call(isolate, factory, receiver, arraysize(argv), argv)); |
| 209 | } |
| 210 | |
| 211 | #ifdef VERIFY_HEAP |
| 212 | if (FLAG_verify_heap) { |
| 213 | cache_handle->JSFunctionResultCacheVerify(); |
| 214 | } |
| 215 | #endif |
| 216 | |
| 217 | // Function invocation may have cleared the cache. Reread all the data. |
| 218 | int finger_index = cache_handle->finger_index(); |
| 219 | int size = cache_handle->size(); |
| 220 | |
| 221 | // If we have spare room, put new data into it, otherwise evict post finger |
| 222 | // entry which is likely to be the least recently used. |
| 223 | int index = -1; |
| 224 | if (size < cache_handle->length()) { |
| 225 | cache_handle->set_size(size + JSFunctionResultCache::kEntrySize); |
| 226 | index = size; |
| 227 | } else { |
| 228 | index = finger_index + JSFunctionResultCache::kEntrySize; |
| 229 | if (index == cache_handle->length()) { |
| 230 | index = JSFunctionResultCache::kEntriesIndex; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | DCHECK(index % 2 == 0); |
| 235 | DCHECK(index >= JSFunctionResultCache::kEntriesIndex); |
| 236 | DCHECK(index < cache_handle->length()); |
| 237 | |
| 238 | cache_handle->set(index, *key_handle); |
| 239 | cache_handle->set(index + 1, *value); |
| 240 | cache_handle->set_finger_index(index); |
| 241 | |
| 242 | #ifdef VERIFY_HEAP |
| 243 | if (FLAG_verify_heap) { |
| 244 | cache_handle->JSFunctionResultCacheVerify(); |
| 245 | } |
| 246 | #endif |
| 247 | |
| 248 | return *value; |
| 249 | } |
| 250 | |
| 251 | |
| 252 | RUNTIME_FUNCTION(Runtime_MessageGetStartPosition) { |
| 253 | SealHandleScope shs(isolate); |
| 254 | DCHECK(args.length() == 1); |
| 255 | CONVERT_ARG_CHECKED(JSMessageObject, message, 0); |
| 256 | return Smi::FromInt(message->start_position()); |
| 257 | } |
| 258 | |
| 259 | |
| 260 | RUNTIME_FUNCTION(Runtime_MessageGetScript) { |
| 261 | SealHandleScope shs(isolate); |
| 262 | DCHECK(args.length() == 1); |
| 263 | CONVERT_ARG_CHECKED(JSMessageObject, message, 0); |
| 264 | return message->script(); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | RUNTIME_FUNCTION(Runtime_IS_VAR) { |
| 269 | UNREACHABLE(); // implemented as macro in the parser |
| 270 | return NULL; |
| 271 | } |
| 272 | |
| 273 | |
| 274 | RUNTIME_FUNCTION(RuntimeReference_GetFromCache) { |
| 275 | HandleScope scope(isolate); |
| 276 | DCHECK(args.length() == 2); |
| 277 | CONVERT_SMI_ARG_CHECKED(id, 0); |
| 278 | args[0] = isolate->native_context()->jsfunction_result_caches()->get(id); |
| 279 | return __RT_impl_Runtime_GetFromCache(args, isolate); |
| 280 | } |
| 281 | } |
| 282 | } // namespace v8::internal |