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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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2210 | 2210 |
2211 RecordJSReturnSite(expr); | 2211 RecordJSReturnSite(expr); |
2212 // Restore context register. | 2212 // Restore context register. |
2213 __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); | 2213 __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
2214 | 2214 |
2215 decrement_stack_height(arg_count + 1); | 2215 decrement_stack_height(arg_count + 1); |
2216 context()->DropAndPlug(1, eax); | 2216 context()->DropAndPlug(1, eax); |
2217 } | 2217 } |
2218 | 2218 |
2219 | 2219 |
2220 void FullCodeGenerator::EmitResolvePossiblyDirectEval(ResolveEvalFlag flag, | 2220 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) { |
2221 int arg_count) { | |
2222 // Push copy of the first argument or undefined if it doesn't exist. | 2221 // Push copy of the first argument or undefined if it doesn't exist. |
2223 if (arg_count > 0) { | 2222 if (arg_count > 0) { |
2224 __ push(Operand(esp, arg_count * kPointerSize)); | 2223 __ push(Operand(esp, arg_count * kPointerSize)); |
2225 } else { | 2224 } else { |
2226 __ push(Immediate(isolate()->factory()->undefined_value())); | 2225 __ push(Immediate(isolate()->factory()->undefined_value())); |
2227 } | 2226 } |
2228 | 2227 |
2229 // Push the receiver of the enclosing function. | 2228 // Push the receiver of the enclosing function. |
2230 __ push(Operand(ebp, (2 + info_->scope()->num_parameters()) * kPointerSize)); | 2229 __ push(Operand(ebp, (2 + info_->scope()->num_parameters()) * kPointerSize)); |
2231 | 2230 |
2232 // Push the strict mode flag. In harmony mode every eval call | 2231 // Push the strict mode flag. In harmony mode every eval call |
2233 // is a strict mode eval call. | 2232 // is a strict mode eval call. |
2234 StrictModeFlag strict_mode = | 2233 StrictModeFlag strict_mode = |
2235 FLAG_harmony_scoping ? kStrictMode : strict_mode_flag(); | 2234 FLAG_harmony_scoping ? kStrictMode : strict_mode_flag(); |
2236 __ push(Immediate(Smi::FromInt(strict_mode))); | 2235 __ push(Immediate(Smi::FromInt(strict_mode))); |
2237 | 2236 |
2238 __ CallRuntime(flag == SKIP_CONTEXT_LOOKUP | 2237 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 4); |
2239 ? Runtime::kResolvePossiblyDirectEvalNoLookup | |
2240 : Runtime::kResolvePossiblyDirectEval, 4); | |
2241 } | 2238 } |
2242 | 2239 |
2243 | 2240 |
2244 void FullCodeGenerator::VisitCall(Call* expr) { | 2241 void FullCodeGenerator::VisitCall(Call* expr) { |
2245 #ifdef DEBUG | 2242 #ifdef DEBUG |
2246 // We want to verify that RecordJSReturnSite gets called on all paths | 2243 // We want to verify that RecordJSReturnSite gets called on all paths |
2247 // through this function. Avoid early returns. | 2244 // through this function. Avoid early returns. |
2248 expr->return_is_recorded_ = false; | 2245 expr->return_is_recorded_ = false; |
2249 #endif | 2246 #endif |
2250 | 2247 |
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2262 { PreservePositionScope pos_scope(masm()->positions_recorder()); | 2259 { PreservePositionScope pos_scope(masm()->positions_recorder()); |
2263 VisitForStackValue(callee); | 2260 VisitForStackValue(callee); |
2264 // Reserved receiver slot. | 2261 // Reserved receiver slot. |
2265 __ push(Immediate(isolate()->factory()->undefined_value())); | 2262 __ push(Immediate(isolate()->factory()->undefined_value())); |
2266 increment_stack_height(); | 2263 increment_stack_height(); |
2267 // Push the arguments. | 2264 // Push the arguments. |
2268 for (int i = 0; i < arg_count; i++) { | 2265 for (int i = 0; i < arg_count; i++) { |
2269 VisitForStackValue(args->at(i)); | 2266 VisitForStackValue(args->at(i)); |
2270 } | 2267 } |
2271 | 2268 |
2272 // If we know that eval can only be shadowed by eval-introduced | |
2273 // variables we attempt to load the global eval function directly in | |
2274 // generated code. If we succeed, there is no need to perform a | |
2275 // context lookup in the runtime system. | |
2276 Label done; | |
2277 Variable* var = proxy->var(); | |
2278 if (!var->IsUnallocated() && var->mode() == DYNAMIC_GLOBAL) { | |
2279 Label slow; | |
2280 EmitLoadGlobalCheckExtensions(var, NOT_INSIDE_TYPEOF, &slow); | |
2281 // Push the function and resolve eval. | |
2282 __ push(eax); | |
2283 EmitResolvePossiblyDirectEval(SKIP_CONTEXT_LOOKUP, arg_count); | |
2284 __ jmp(&done); | |
2285 __ bind(&slow); | |
2286 } | |
2287 | |
2288 // Push a copy of the function (found below the arguments) and | 2269 // Push a copy of the function (found below the arguments) and |
2289 // resolve eval. | 2270 // resolve eval. |
2290 __ push(Operand(esp, (arg_count + 1) * kPointerSize)); | 2271 __ push(Operand(esp, (arg_count + 1) * kPointerSize)); |
2291 EmitResolvePossiblyDirectEval(PERFORM_CONTEXT_LOOKUP, arg_count); | 2272 EmitResolvePossiblyDirectEval(arg_count); |
2292 __ bind(&done); | |
2293 | 2273 |
2294 // The runtime call returns a pair of values in eax (function) and | 2274 // The runtime call returns a pair of values in eax (function) and |
2295 // edx (receiver). Touch up the stack with the right values. | 2275 // edx (receiver). Touch up the stack with the right values. |
2296 __ mov(Operand(esp, (arg_count + 0) * kPointerSize), edx); | 2276 __ mov(Operand(esp, (arg_count + 0) * kPointerSize), edx); |
2297 __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax); | 2277 __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax); |
2298 } | 2278 } |
2299 // Record source position for debugger. | 2279 // Record source position for debugger. |
2300 SetSourcePosition(expr->position()); | 2280 SetSourcePosition(expr->position()); |
2301 CallFunctionStub stub(arg_count, RECEIVER_MIGHT_BE_IMPLICIT); | 2281 CallFunctionStub stub(arg_count, RECEIVER_MIGHT_BE_IMPLICIT); |
2302 __ CallStub(&stub); | 2282 __ CallStub(&stub); |
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4424 *context_length = 0; | 4404 *context_length = 0; |
4425 return previous_; | 4405 return previous_; |
4426 } | 4406 } |
4427 | 4407 |
4428 | 4408 |
4429 #undef __ | 4409 #undef __ |
4430 | 4410 |
4431 } } // namespace v8::internal | 4411 } } // namespace v8::internal |
4432 | 4412 |
4433 #endif // V8_TARGET_ARCH_IA32 | 4413 #endif // V8_TARGET_ARCH_IA32 |
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