Update V8 to version 4.1.0.21
This is a cherry-pick of all commits up to and including the
4.1.0.21 cherry-pick in Chromium.
Original commit message:
Version 4.1.0.21 (cherry-pick)
Merged 206e9136bde0f2b5ae8cb77afbb1e7833e5bd412
Unlink pages from the space page list after evacuation.
BUG=430201
LOG=N
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/953813002
Cr-Commit-Position: refs/branch-heads/4.1@{#22}
Cr-Branched-From: 2e08d2a7aa9d65d269d8c57aba82eb38a8cb0a18-refs/heads/candidates@{#25353}
---
FPIIM-449
Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/src/runtime/runtime-generator.cc b/src/runtime/runtime-generator.cc
new file mode 100644
index 0000000..ff07acd
--- /dev/null
+++ b/src/runtime/runtime-generator.cc
@@ -0,0 +1,227 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/arguments.h"
+#include "src/frames-inl.h"
+#include "src/runtime/runtime-utils.h"
+
+namespace v8 {
+namespace internal {
+
+RUNTIME_FUNCTION(Runtime_CreateJSGeneratorObject) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 0);
+
+ JavaScriptFrameIterator it(isolate);
+ JavaScriptFrame* frame = it.frame();
+ Handle<JSFunction> function(frame->function());
+ RUNTIME_ASSERT(function->shared()->is_generator());
+
+ Handle<JSGeneratorObject> generator;
+ if (frame->IsConstructor()) {
+ generator = handle(JSGeneratorObject::cast(frame->receiver()));
+ } else {
+ generator = isolate->factory()->NewJSGeneratorObject(function);
+ }
+ generator->set_function(*function);
+ generator->set_context(Context::cast(frame->context()));
+ generator->set_receiver(frame->receiver());
+ generator->set_continuation(0);
+ generator->set_operand_stack(isolate->heap()->empty_fixed_array());
+ generator->set_stack_handler_index(-1);
+
+ return *generator;
+}
+
+
+RUNTIME_FUNCTION(Runtime_SuspendJSGeneratorObject) {
+ HandleScope handle_scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator_object, 0);
+
+ JavaScriptFrameIterator stack_iterator(isolate);
+ JavaScriptFrame* frame = stack_iterator.frame();
+ RUNTIME_ASSERT(frame->function()->shared()->is_generator());
+ DCHECK_EQ(frame->function(), generator_object->function());
+
+ // The caller should have saved the context and continuation already.
+ DCHECK_EQ(generator_object->context(), Context::cast(frame->context()));
+ DCHECK_LT(0, generator_object->continuation());
+
+ // We expect there to be at least two values on the operand stack: the return
+ // value of the yield expression, and the argument to this runtime call.
+ // Neither of those should be saved.
+ int operands_count = frame->ComputeOperandsCount();
+ DCHECK_GE(operands_count, 2);
+ operands_count -= 2;
+
+ if (operands_count == 0) {
+ // Although it's semantically harmless to call this function with an
+ // operands_count of zero, it is also unnecessary.
+ DCHECK_EQ(generator_object->operand_stack(),
+ isolate->heap()->empty_fixed_array());
+ DCHECK_EQ(generator_object->stack_handler_index(), -1);
+ // If there are no operands on the stack, there shouldn't be a handler
+ // active either.
+ DCHECK(!frame->HasHandler());
+ } else {
+ int stack_handler_index = -1;
+ Handle<FixedArray> operand_stack =
+ isolate->factory()->NewFixedArray(operands_count);
+ frame->SaveOperandStack(*operand_stack, &stack_handler_index);
+ generator_object->set_operand_stack(*operand_stack);
+ generator_object->set_stack_handler_index(stack_handler_index);
+ }
+
+ return isolate->heap()->undefined_value();
+}
+
+
+// Note that this function is the slow path for resuming generators. It is only
+// called if the suspended activation had operands on the stack, stack handlers
+// needing rewinding, or if the resume should throw an exception. The fast path
+// is handled directly in FullCodeGenerator::EmitGeneratorResume(), which is
+// inlined into GeneratorNext and GeneratorThrow. EmitGeneratorResumeResume is
+// called in any case, as it needs to reconstruct the stack frame and make space
+// for arguments and operands.
+RUNTIME_FUNCTION(Runtime_ResumeJSGeneratorObject) {
+ SealHandleScope shs(isolate);
+ DCHECK(args.length() == 3);
+ CONVERT_ARG_CHECKED(JSGeneratorObject, generator_object, 0);
+ CONVERT_ARG_CHECKED(Object, value, 1);
+ CONVERT_SMI_ARG_CHECKED(resume_mode_int, 2);
+ JavaScriptFrameIterator stack_iterator(isolate);
+ JavaScriptFrame* frame = stack_iterator.frame();
+
+ DCHECK_EQ(frame->function(), generator_object->function());
+ DCHECK(frame->function()->is_compiled());
+
+ STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting < 0);
+ STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed == 0);
+
+ Address pc = generator_object->function()->code()->instruction_start();
+ int offset = generator_object->continuation();
+ DCHECK(offset > 0);
+ frame->set_pc(pc + offset);
+ if (FLAG_enable_ool_constant_pool) {
+ frame->set_constant_pool(
+ generator_object->function()->code()->constant_pool());
+ }
+ generator_object->set_continuation(JSGeneratorObject::kGeneratorExecuting);
+
+ FixedArray* operand_stack = generator_object->operand_stack();
+ int operands_count = operand_stack->length();
+ if (operands_count != 0) {
+ frame->RestoreOperandStack(operand_stack,
+ generator_object->stack_handler_index());
+ generator_object->set_operand_stack(isolate->heap()->empty_fixed_array());
+ generator_object->set_stack_handler_index(-1);
+ }
+
+ JSGeneratorObject::ResumeMode resume_mode =
+ static_cast<JSGeneratorObject::ResumeMode>(resume_mode_int);
+ switch (resume_mode) {
+ case JSGeneratorObject::NEXT:
+ return value;
+ case JSGeneratorObject::THROW:
+ return isolate->Throw(value);
+ }
+
+ UNREACHABLE();
+ return isolate->ThrowIllegalOperation();
+}
+
+
+RUNTIME_FUNCTION(Runtime_GeneratorClose) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ generator->set_continuation(JSGeneratorObject::kGeneratorClosed);
+
+ return isolate->heap()->undefined_value();
+}
+
+
+// Returns function of generator activation.
+RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ return generator->function();
+}
+
+
+// Returns context of generator activation.
+RUNTIME_FUNCTION(Runtime_GeneratorGetContext) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ return generator->context();
+}
+
+
+// Returns receiver of generator activation.
+RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ return generator->receiver();
+}
+
+
+// Returns generator continuation as a PC offset, or the magic -1 or 0 values.
+RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ return Smi::FromInt(generator->continuation());
+}
+
+
+RUNTIME_FUNCTION(Runtime_GeneratorGetSourcePosition) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+ if (generator->is_suspended()) {
+ Handle<Code> code(generator->function()->code(), isolate);
+ int offset = generator->continuation();
+
+ RUNTIME_ASSERT(0 <= offset && offset < code->Size());
+ Address pc = code->address() + offset;
+
+ return Smi::FromInt(code->SourcePosition(pc));
+ }
+
+ return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(Runtime_FunctionIsGenerator) {
+ SealHandleScope shs(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_CHECKED(JSFunction, f, 0);
+ return isolate->heap()->ToBoolean(f->shared()->is_generator());
+}
+
+
+RUNTIME_FUNCTION(RuntimeReference_GeneratorNext) {
+ UNREACHABLE(); // Optimization disabled in SetUpGenerators().
+ return NULL;
+}
+
+
+RUNTIME_FUNCTION(RuntimeReference_GeneratorThrow) {
+ UNREACHABLE(); // Optimization disabled in SetUpGenerators().
+ return NULL;
+}
+}
+} // namespace v8::internal