-// Copyright 2012 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <stdlib.h>
-
-#include "v8.h"
-
-#include "api.h"
-#include "bootstrapper.h"
-#include "codegen.h"
-#include "debug.h"
-#include "deoptimizer.h"
-#include "isolate-inl.h"
-#include "runtime-profiler.h"
-#include "simulator.h"
-#include "v8threads.h"
-#include "vm-state-inl.h"
+// 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/execution.h"
+
+#include "src/bootstrapper.h"
+#include "src/codegen.h"
+#include "src/deoptimizer.h"
+#include "src/isolate-inl.h"
+#include "src/vm-state-inl.h"
namespace v8 {
namespace internal {
-
StackGuard::StackGuard()
: isolate_(NULL) {
}
void StackGuard::set_interrupt_limits(const ExecutionAccess& lock) {
- ASSERT(isolate_ != NULL);
- // Ignore attempts to interrupt when interrupts are postponed.
- if (should_postpone_interrupts(lock)) return;
+ DCHECK(isolate_ != NULL);
thread_local_.jslimit_ = kInterruptLimit;
thread_local_.climit_ = kInterruptLimit;
isolate_->heap()->SetStackLimits();
void StackGuard::reset_limits(const ExecutionAccess& lock) {
- ASSERT(isolate_ != NULL);
+ DCHECK(isolate_ != NULL);
thread_local_.jslimit_ = thread_local_.real_jslimit_;
thread_local_.climit_ = thread_local_.real_climit_;
isolate_->heap()->SetStackLimits();
}
-static Handle<Object> Invoke(bool is_construct,
- Handle<JSFunction> function,
- Handle<Object> receiver,
- int argc,
- Handle<Object> args[],
- bool* has_pending_exception) {
+MUST_USE_RESULT static MaybeHandle<Object> Invoke(
+ bool is_construct,
+ Handle<JSFunction> function,
+ Handle<Object> receiver,
+ int argc,
+ Handle<Object> args[]) {
Isolate* isolate = function->GetIsolate();
// Entering JavaScript.
CHECK(AllowJavascriptExecution::IsAllowed(isolate));
if (!ThrowOnJavascriptExecution::IsAllowed(isolate)) {
isolate->ThrowIllegalOperation();
- *has_pending_exception = true;
isolate->ReportPendingMessages();
- return Handle<Object>();
+ return MaybeHandle<Object>();
}
// Placeholder for return value.
- MaybeObject* value = reinterpret_cast<Object*>(kZapValue);
+ Object* value = NULL;
typedef Object* (*JSEntryFunction)(byte* entry,
Object* function,
// receiver instead to avoid having a 'this' pointer which refers
// directly to a global object.
if (receiver->IsGlobalObject()) {
- Handle<GlobalObject> global = Handle<GlobalObject>::cast(receiver);
- receiver = Handle<JSObject>(global->global_receiver());
+ receiver = handle(Handle<GlobalObject>::cast(receiver)->global_proxy());
}
// Make sure that the global object of the context we're about to
// make the current one is indeed a global object.
- ASSERT(function->context()->global_object()->IsGlobalObject());
+ DCHECK(function->context()->global_object()->IsGlobalObject());
{
// Save and restore context around invocation and block the
}
#ifdef VERIFY_HEAP
- value->Verify();
+ value->ObjectVerify();
#endif
// Update the pending exception flag and return the value.
- *has_pending_exception = value->IsException();
- ASSERT(*has_pending_exception == isolate->has_pending_exception());
- if (*has_pending_exception) {
+ bool has_exception = value->IsException();
+ DCHECK(has_exception == isolate->has_pending_exception());
+ if (has_exception) {
isolate->ReportPendingMessages();
-#ifdef ENABLE_DEBUGGER_SUPPORT
// Reset stepping state when script exits with uncaught exception.
- if (isolate->debugger()->IsDebuggerActive()) {
+ if (isolate->debug()->is_active()) {
isolate->debug()->ClearStepping();
}
-#endif // ENABLE_DEBUGGER_SUPPORT
- return Handle<Object>();
+ return MaybeHandle<Object>();
} else {
isolate->clear_pending_message();
}
- return Handle<Object>(value->ToObjectUnchecked(), isolate);
+ return Handle<Object>(value, isolate);
}
-Handle<Object> Execution::Call(Isolate* isolate,
- Handle<Object> callable,
- Handle<Object> receiver,
- int argc,
- Handle<Object> argv[],
- bool* pending_exception,
- bool convert_receiver) {
- *pending_exception = false;
-
+MaybeHandle<Object> Execution::Call(Isolate* isolate,
+ Handle<Object> callable,
+ Handle<Object> receiver,
+ int argc,
+ Handle<Object> argv[],
+ bool convert_receiver) {
if (!callable->IsJSFunction()) {
- callable = TryGetFunctionDelegate(isolate, callable, pending_exception);
- if (*pending_exception) return callable;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, callable, TryGetFunctionDelegate(isolate, callable), Object);
}
Handle<JSFunction> func = Handle<JSFunction>::cast(callable);
!func->shared()->native() &&
func->shared()->strict_mode() == SLOPPY) {
if (receiver->IsUndefined() || receiver->IsNull()) {
- Object* global = func->context()->global_object()->global_receiver();
- // Under some circumstances, 'global' can be the JSBuiltinsObject
- // In that case, don't rewrite. (FWIW, the same holds for
- // GetIsolate()->global_object()->global_receiver().)
- if (!global->IsJSBuiltinsObject()) {
- receiver = Handle<Object>(global, func->GetIsolate());
- }
+ receiver = handle(func->global_proxy());
+ DCHECK(!receiver->IsJSBuiltinsObject());
} else {
- receiver = ToObject(isolate, receiver, pending_exception);
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, receiver, ToObject(isolate, receiver), Object);
}
- if (*pending_exception) return callable;
}
- return Invoke(false, func, receiver, argc, argv, pending_exception);
+ return Invoke(false, func, receiver, argc, argv);
}
-Handle<Object> Execution::New(Handle<JSFunction> func,
- int argc,
- Handle<Object> argv[],
- bool* pending_exception) {
- return Invoke(true, func, func->GetIsolate()->global_object(), argc, argv,
- pending_exception);
+MaybeHandle<Object> Execution::New(Handle<JSFunction> func,
+ int argc,
+ Handle<Object> argv[]) {
+ return Invoke(true, func, handle(func->global_proxy()), argc, argv);
}
-Handle<Object> Execution::TryCall(Handle<JSFunction> func,
- Handle<Object> receiver,
- int argc,
- Handle<Object> args[],
- bool* caught_exception) {
+MaybeHandle<Object> Execution::TryCall(Handle<JSFunction> func,
+ Handle<Object> receiver, int argc,
+ Handle<Object> args[],
+ MaybeHandle<Object>* exception_out) {
+ bool is_termination = false;
+ Isolate* isolate = func->GetIsolate();
+ MaybeHandle<Object> maybe_result;
+ if (exception_out != NULL) *exception_out = MaybeHandle<Object>();
// Enter a try-block while executing the JavaScript code. To avoid
// duplicate error printing it must be non-verbose. Also, to avoid
// creating message objects during stack overflow we shouldn't
// capture messages.
- v8::TryCatch catcher;
- catcher.SetVerbose(false);
- catcher.SetCaptureMessage(false);
- *caught_exception = false;
-
- // Get isolate now, because handle might be persistent
- // and get destroyed in the next call.
- Isolate* isolate = func->GetIsolate();
- Handle<Object> result = Invoke(false, func, receiver, argc, args,
- caught_exception);
-
- if (*caught_exception) {
- ASSERT(catcher.HasCaught());
- ASSERT(isolate->has_pending_exception());
- ASSERT(isolate->external_caught_exception());
- if (isolate->pending_exception() ==
- isolate->heap()->termination_exception()) {
- result = isolate->factory()->termination_exception();
- } else {
- result = v8::Utils::OpenHandle(*catcher.Exception());
+ {
+ v8::TryCatch catcher;
+ catcher.SetVerbose(false);
+ catcher.SetCaptureMessage(false);
+
+ maybe_result = Invoke(false, func, receiver, argc, args);
+
+ if (maybe_result.is_null()) {
+ DCHECK(catcher.HasCaught());
+ DCHECK(isolate->has_pending_exception());
+ DCHECK(isolate->external_caught_exception());
+ if (exception_out != NULL) {
+ if (isolate->pending_exception() ==
+ isolate->heap()->termination_exception()) {
+ is_termination = true;
+ } else {
+ *exception_out = v8::Utils::OpenHandle(*catcher.Exception());
+ }
+ }
+ isolate->OptionalRescheduleException(true);
}
- isolate->OptionalRescheduleException(true);
- }
- ASSERT(!isolate->has_pending_exception());
- ASSERT(!isolate->external_caught_exception());
- return result;
+ DCHECK(!isolate->has_pending_exception());
+ DCHECK(!isolate->external_caught_exception());
+ }
+ if (is_termination) isolate->TerminateExecution();
+ return maybe_result;
}
Handle<Object> Execution::GetFunctionDelegate(Isolate* isolate,
Handle<Object> object) {
- ASSERT(!object->IsJSFunction());
+ DCHECK(!object->IsJSFunction());
Factory* factory = isolate->factory();
// If you return a function from here, it will be called when an
}
-Handle<Object> Execution::TryGetFunctionDelegate(Isolate* isolate,
- Handle<Object> object,
- bool* has_pending_exception) {
- ASSERT(!object->IsJSFunction());
+MaybeHandle<Object> Execution::TryGetFunctionDelegate(Isolate* isolate,
+ Handle<Object> object) {
+ DCHECK(!object->IsJSFunction());
// If object is a function proxy, get its handler. Iterate if necessary.
Object* fun = *object;
// If the Object doesn't have an instance-call handler we should
// throw a non-callable exception.
- i::Handle<i::Object> error_obj = isolate->factory()->NewTypeError(
- "called_non_callable", i::HandleVector<i::Object>(&object, 1));
- isolate->Throw(*error_obj);
- *has_pending_exception = true;
-
- return isolate->factory()->undefined_value();
+ THROW_NEW_ERROR(isolate, NewTypeError("called_non_callable",
+ i::HandleVector<i::Object>(&object, 1)),
+ Object);
}
Handle<Object> Execution::GetConstructorDelegate(Isolate* isolate,
Handle<Object> object) {
- ASSERT(!object->IsJSFunction());
+ DCHECK(!object->IsJSFunction());
// If you return a function from here, it will be called when an
// attempt is made to call the given object as a constructor.
}
-Handle<Object> Execution::TryGetConstructorDelegate(
- Isolate* isolate,
- Handle<Object> object,
- bool* has_pending_exception) {
- ASSERT(!object->IsJSFunction());
+MaybeHandle<Object> Execution::TryGetConstructorDelegate(
+ Isolate* isolate, Handle<Object> object) {
+ DCHECK(!object->IsJSFunction());
// If you return a function from here, it will be called when an
// attempt is made to call the given object as a constructor.
// If the Object doesn't have an instance-call handler we should
// throw a non-callable exception.
- i::Handle<i::Object> error_obj = isolate->factory()->NewTypeError(
- "called_non_callable", i::HandleVector<i::Object>(&object, 1));
- isolate->Throw(*error_obj);
- *has_pending_exception = true;
-
- return isolate->factory()->undefined_value();
-}
-
-
-void Execution::RunMicrotasks(Isolate* isolate) {
- ASSERT(isolate->microtask_pending());
- bool threw = false;
- Execution::Call(
- isolate,
- isolate->run_microtasks(),
- isolate->factory()->undefined_value(),
- 0,
- NULL,
- &threw);
- ASSERT(!threw);
-}
-
-
-void Execution::EnqueueMicrotask(Isolate* isolate, Handle<Object> microtask) {
- bool threw = false;
- Handle<Object> args[] = { microtask };
- Execution::Call(
- isolate,
- isolate->enqueue_external_microtask(),
- isolate->factory()->undefined_value(),
- 1,
- args,
- &threw);
- ASSERT(!threw);
-}
-
-
-bool StackGuard::IsStackOverflow() {
- ExecutionAccess access(isolate_);
- return (thread_local_.jslimit_ != kInterruptLimit &&
- thread_local_.climit_ != kInterruptLimit);
+ THROW_NEW_ERROR(isolate, NewTypeError("called_non_callable",
+ i::HandleVector<i::Object>(&object, 1)),
+ Object);
}
}
-bool StackGuard::ShouldPostponeInterrupts() {
- ExecutionAccess access(isolate_);
- return should_postpone_interrupts(access);
-}
-
-
-bool StackGuard::IsInterrupted() {
- ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & INTERRUPT) != 0;
-}
-
-
-void StackGuard::Interrupt() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= INTERRUPT;
- set_interrupt_limits(access);
-}
-
-
-bool StackGuard::IsPreempted() {
- ExecutionAccess access(isolate_);
- return thread_local_.interrupt_flags_ & PREEMPT;
-}
-
-
-void StackGuard::Preempt() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= PREEMPT;
- set_interrupt_limits(access);
-}
-
-
-bool StackGuard::IsTerminateExecution() {
- ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & TERMINATE) != 0;
-}
-
-
-void StackGuard::CancelTerminateExecution() {
- ExecutionAccess access(isolate_);
- Continue(TERMINATE);
- isolate_->CancelTerminateExecution();
-}
-
-
-void StackGuard::TerminateExecution() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= TERMINATE;
- set_interrupt_limits(access);
-}
-
-
-bool StackGuard::IsGCRequest() {
+void StackGuard::PushPostponeInterruptsScope(PostponeInterruptsScope* scope) {
ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & GC_REQUEST) != 0;
+ // Intercept already requested interrupts.
+ int intercepted = thread_local_.interrupt_flags_ & scope->intercept_mask_;
+ scope->intercepted_flags_ = intercepted;
+ thread_local_.interrupt_flags_ &= ~intercepted;
+ if (!has_pending_interrupts(access)) reset_limits(access);
+ // Add scope to the chain.
+ scope->prev_ = thread_local_.postpone_interrupts_;
+ thread_local_.postpone_interrupts_ = scope;
}
-void StackGuard::RequestGC() {
+void StackGuard::PopPostponeInterruptsScope() {
ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= GC_REQUEST;
- if (thread_local_.postpone_interrupts_nesting_ == 0) {
- thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
- isolate_->heap()->SetStackLimits();
- }
+ PostponeInterruptsScope* top = thread_local_.postpone_interrupts_;
+ // Make intercepted interrupts active.
+ DCHECK((thread_local_.interrupt_flags_ & top->intercept_mask_) == 0);
+ thread_local_.interrupt_flags_ |= top->intercepted_flags_;
+ if (has_pending_interrupts(access)) set_interrupt_limits(access);
+ // Remove scope from chain.
+ thread_local_.postpone_interrupts_ = top->prev_;
}
-bool StackGuard::IsInstallCodeRequest() {
+bool StackGuard::CheckInterrupt(InterruptFlag flag) {
ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & INSTALL_CODE) != 0;
+ return thread_local_.interrupt_flags_ & flag;
}
-void StackGuard::RequestInstallCode() {
+void StackGuard::RequestInterrupt(InterruptFlag flag) {
ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= INSTALL_CODE;
- if (thread_local_.postpone_interrupts_nesting_ == 0) {
- thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
- isolate_->heap()->SetStackLimits();
+ // Check the chain of PostponeInterruptsScopes for interception.
+ if (thread_local_.postpone_interrupts_ &&
+ thread_local_.postpone_interrupts_->Intercept(flag)) {
+ return;
}
-}
-
-
-bool StackGuard::IsFullDeopt() {
- ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & FULL_DEOPT) != 0;
-}
-
-
-void StackGuard::FullDeopt() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= FULL_DEOPT;
- set_interrupt_limits(access);
-}
-
-
-bool StackGuard::IsDeoptMarkedAllocationSites() {
- ExecutionAccess access(isolate_);
- return (thread_local_.interrupt_flags_ & DEOPT_MARKED_ALLOCATION_SITES) != 0;
-}
-
-void StackGuard::DeoptMarkedAllocationSites() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= DEOPT_MARKED_ALLOCATION_SITES;
- set_interrupt_limits(access);
-}
-
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-bool StackGuard::IsDebugBreak() {
- ExecutionAccess access(isolate_);
- return thread_local_.interrupt_flags_ & DEBUGBREAK;
-}
-
-
-void StackGuard::DebugBreak() {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= DEBUGBREAK;
+ // Not intercepted. Set as active interrupt flag.
+ thread_local_.interrupt_flags_ |= flag;
set_interrupt_limits(access);
}
-bool StackGuard::IsDebugCommand() {
- ExecutionAccess access(isolate_);
- return thread_local_.interrupt_flags_ & DEBUGCOMMAND;
-}
-
-
-void StackGuard::DebugCommand() {
- if (FLAG_debugger_auto_break) {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= DEBUGCOMMAND;
- set_interrupt_limits(access);
- }
-}
-#endif
-
-void StackGuard::Continue(InterruptFlag after_what) {
+void StackGuard::ClearInterrupt(InterruptFlag flag) {
ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ &= ~static_cast<int>(after_what);
- if (!should_postpone_interrupts(access) && !has_pending_interrupts(access)) {
- reset_limits(access);
+ // Clear the interrupt flag from the chain of PostponeInterruptsScopes.
+ for (PostponeInterruptsScope* current = thread_local_.postpone_interrupts_;
+ current != NULL;
+ current = current->prev_) {
+ current->intercepted_flags_ &= ~flag;
}
-}
-
-
-void StackGuard::RequestInterrupt(InterruptCallback callback, void* data) {
- ExecutionAccess access(isolate_);
- thread_local_.interrupt_flags_ |= API_INTERRUPT;
- thread_local_.interrupt_callback_ = callback;
- thread_local_.interrupt_callback_data_ = data;
- set_interrupt_limits(access);
-}
-
-void StackGuard::ClearInterrupt() {
- thread_local_.interrupt_callback_ = 0;
- thread_local_.interrupt_callback_data_ = 0;
- Continue(API_INTERRUPT);
+ // Clear the interrupt flag from the active interrupt flags.
+ thread_local_.interrupt_flags_ &= ~flag;
+ if (!has_pending_interrupts(access)) reset_limits(access);
}
-bool StackGuard::IsAPIInterrupt() {
+bool StackGuard::CheckAndClearInterrupt(InterruptFlag flag) {
ExecutionAccess access(isolate_);
- return thread_local_.interrupt_flags_ & API_INTERRUPT;
-}
-
-
-void StackGuard::InvokeInterruptCallback() {
- InterruptCallback callback = 0;
- void* data = 0;
-
- {
- ExecutionAccess access(isolate_);
- callback = thread_local_.interrupt_callback_;
- data = thread_local_.interrupt_callback_data_;
- thread_local_.interrupt_callback_ = NULL;
- thread_local_.interrupt_callback_data_ = NULL;
- }
-
- if (callback != NULL) {
- VMState<EXTERNAL> state(isolate_);
- HandleScope handle_scope(isolate_);
- callback(reinterpret_cast<v8::Isolate*>(isolate_), data);
- }
+ bool result = (thread_local_.interrupt_flags_ & flag);
+ thread_local_.interrupt_flags_ &= ~flag;
+ if (!has_pending_interrupts(access)) reset_limits(access);
+ return result;
}
char* StackGuard::ArchiveStackGuard(char* to) {
ExecutionAccess access(isolate_);
- OS::MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
+ MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
ThreadLocal blank;
// Set the stack limits using the old thread_local_.
char* StackGuard::RestoreStackGuard(char* from) {
ExecutionAccess access(isolate_);
- OS::MemCopy(
- reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
+ MemCopy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
isolate_->heap()->SetStackLimits();
return from + sizeof(ThreadLocal);
}
jslimit_ = kIllegalLimit;
real_climit_ = kIllegalLimit;
climit_ = kIllegalLimit;
- nesting_ = 0;
- postpone_interrupts_nesting_ = 0;
+ postpone_interrupts_ = NULL;
interrupt_flags_ = 0;
- interrupt_callback_ = NULL;
- interrupt_callback_data_ = NULL;
}
bool StackGuard::ThreadLocal::Initialize(Isolate* isolate) {
bool should_set_stack_limits = false;
if (real_climit_ == kIllegalLimit) {
- // Takes the address of the limit variable in order to find out where
- // the top of stack is right now.
const uintptr_t kLimitSize = FLAG_stack_size * KB;
- uintptr_t limit = reinterpret_cast<uintptr_t>(&limit) - kLimitSize;
- ASSERT(reinterpret_cast<uintptr_t>(&limit) > kLimitSize);
+ DCHECK(GetCurrentStackPosition() > kLimitSize);
+ uintptr_t limit = GetCurrentStackPosition() - kLimitSize;
real_jslimit_ = SimulatorStack::JsLimitFromCLimit(isolate, limit);
jslimit_ = SimulatorStack::JsLimitFromCLimit(isolate, limit);
real_climit_ = limit;
climit_ = limit;
should_set_stack_limits = true;
}
- nesting_ = 0;
- postpone_interrupts_nesting_ = 0;
+ postpone_interrupts_ = NULL;
interrupt_flags_ = 0;
- interrupt_callback_ = NULL;
- interrupt_callback_data_ = NULL;
return should_set_stack_limits;
}
// --- C a l l s t o n a t i v e s ---
-#define RETURN_NATIVE_CALL(name, args, has_pending_exception) \
+#define RETURN_NATIVE_CALL(name, args) \
do { \
Handle<Object> argv[] = args; \
- ASSERT(has_pending_exception != NULL); \
return Call(isolate, \
isolate->name##_fun(), \
isolate->js_builtins_object(), \
- ARRAY_SIZE(argv), argv, \
- has_pending_exception); \
+ arraysize(argv), argv); \
} while (false)
-Handle<Object> Execution::ToNumber(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_number, { obj }, exc);
+MaybeHandle<Object> Execution::ToNumber(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_number, { obj });
}
-Handle<Object> Execution::ToString(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_string, { obj }, exc);
+MaybeHandle<Object> Execution::ToString(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_string, { obj });
}
-Handle<Object> Execution::ToDetailString(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_detail_string, { obj }, exc);
+MaybeHandle<Object> Execution::ToDetailString(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_detail_string, { obj });
}
-Handle<Object> Execution::ToObject(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
+MaybeHandle<Object> Execution::ToObject(
+ Isolate* isolate, Handle<Object> obj) {
if (obj->IsSpecObject()) return obj;
- RETURN_NATIVE_CALL(to_object, { obj }, exc);
+ RETURN_NATIVE_CALL(to_object, { obj });
}
-Handle<Object> Execution::ToInteger(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_integer, { obj }, exc);
+MaybeHandle<Object> Execution::ToInteger(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_integer, { obj });
}
-Handle<Object> Execution::ToUint32(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_uint32, { obj }, exc);
+MaybeHandle<Object> Execution::ToUint32(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_uint32, { obj });
}
-Handle<Object> Execution::ToInt32(
- Isolate* isolate, Handle<Object> obj, bool* exc) {
- RETURN_NATIVE_CALL(to_int32, { obj }, exc);
+MaybeHandle<Object> Execution::ToInt32(
+ Isolate* isolate, Handle<Object> obj) {
+ RETURN_NATIVE_CALL(to_int32, { obj });
}
-Handle<Object> Execution::NewDate(Isolate* isolate, double time, bool* exc) {
+MaybeHandle<Object> Execution::NewDate(Isolate* isolate, double time) {
Handle<Object> time_obj = isolate->factory()->NewNumber(time);
- RETURN_NATIVE_CALL(create_date, { time_obj }, exc);
+ RETURN_NATIVE_CALL(create_date, { time_obj });
}
#undef RETURN_NATIVE_CALL
-Handle<JSRegExp> Execution::NewJSRegExp(Handle<String> pattern,
- Handle<String> flags,
- bool* exc) {
+MaybeHandle<JSRegExp> Execution::NewJSRegExp(Handle<String> pattern,
+ Handle<String> flags) {
+ Isolate* isolate = pattern->GetIsolate();
Handle<JSFunction> function = Handle<JSFunction>(
- pattern->GetIsolate()->native_context()->regexp_function());
- Handle<Object> re_obj = RegExpImpl::CreateRegExpLiteral(
- function, pattern, flags, exc);
- if (*exc) return Handle<JSRegExp>();
+ isolate->native_context()->regexp_function());
+ Handle<Object> re_obj;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, re_obj,
+ RegExpImpl::CreateRegExpLiteral(function, pattern, flags),
+ JSRegExp);
return Handle<JSRegExp>::cast(re_obj);
}
return factory->undefined_value();
}
- Handle<Object> char_at = GetProperty(
- isolate, isolate->js_builtins_object(), factory->char_at_string());
+ Handle<Object> char_at = Object::GetProperty(
+ isolate->js_builtins_object(),
+ factory->char_at_string()).ToHandleChecked();
if (!char_at->IsJSFunction()) {
return factory->undefined_value();
}
- bool caught_exception;
Handle<Object> index_object = factory->NewNumberFromInt(int_index);
Handle<Object> index_arg[] = { index_object };
- Handle<Object> result = TryCall(Handle<JSFunction>::cast(char_at),
- string,
- ARRAY_SIZE(index_arg),
- index_arg,
- &caught_exception);
- if (caught_exception) {
+ Handle<Object> result;
+ if (!TryCall(Handle<JSFunction>::cast(char_at),
+ string,
+ arraysize(index_arg),
+ index_arg).ToHandle(&result)) {
return factory->undefined_value();
}
return result;
}
-Handle<JSFunction> Execution::InstantiateFunction(
- Handle<FunctionTemplateInfo> data,
- bool* exc) {
+MaybeHandle<JSFunction> Execution::InstantiateFunction(
+ Handle<FunctionTemplateInfo> data) {
Isolate* isolate = data->GetIsolate();
if (!data->do_not_cache()) {
// Fast case: see if the function has already been instantiated
int serial_number = Smi::cast(data->serial_number())->value();
Handle<JSObject> cache(isolate->native_context()->function_cache());
Handle<Object> elm =
- Object::GetElementNoExceptionThrown(isolate, cache, serial_number);
+ Object::GetElement(isolate, cache, serial_number).ToHandleChecked();
if (elm->IsJSFunction()) return Handle<JSFunction>::cast(elm);
}
// The function has not yet been instantiated in this context; do it.
Handle<Object> args[] = { data };
- Handle<Object> result = Call(isolate,
- isolate->instantiate_fun(),
- isolate->js_builtins_object(),
- ARRAY_SIZE(args),
- args,
- exc);
- if (*exc) return Handle<JSFunction>::null();
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, result,
+ Call(isolate,
+ isolate->instantiate_fun(),
+ isolate->js_builtins_object(),
+ arraysize(args),
+ args),
+ JSFunction);
return Handle<JSFunction>::cast(result);
}
-Handle<JSObject> Execution::InstantiateObject(Handle<ObjectTemplateInfo> data,
- bool* exc) {
+MaybeHandle<JSObject> Execution::InstantiateObject(
+ Handle<ObjectTemplateInfo> data) {
Isolate* isolate = data->GetIsolate();
+ Handle<Object> result;
if (data->property_list()->IsUndefined() &&
!data->constructor()->IsUndefined()) {
- // Initialization to make gcc happy.
- Object* result = NULL;
- {
- HandleScope scope(isolate);
- Handle<FunctionTemplateInfo> cons_template =
- Handle<FunctionTemplateInfo>(
- FunctionTemplateInfo::cast(data->constructor()));
- Handle<JSFunction> cons = InstantiateFunction(cons_template, exc);
- if (*exc) return Handle<JSObject>::null();
- Handle<Object> value = New(cons, 0, NULL, exc);
- if (*exc) return Handle<JSObject>::null();
- result = *value;
- }
- ASSERT(!*exc);
- return Handle<JSObject>(JSObject::cast(result));
+ Handle<FunctionTemplateInfo> cons_template =
+ Handle<FunctionTemplateInfo>(
+ FunctionTemplateInfo::cast(data->constructor()));
+ Handle<JSFunction> cons;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, cons, InstantiateFunction(cons_template), JSObject);
+ ASSIGN_RETURN_ON_EXCEPTION(isolate, result, New(cons, 0, NULL), JSObject);
} else {
Handle<Object> args[] = { data };
- Handle<Object> result = Call(isolate,
- isolate->instantiate_fun(),
- isolate->js_builtins_object(),
- ARRAY_SIZE(args),
- args,
- exc);
- if (*exc) return Handle<JSObject>::null();
- return Handle<JSObject>::cast(result);
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, result,
+ Call(isolate,
+ isolate->instantiate_fun(),
+ isolate->js_builtins_object(),
+ arraysize(args),
+ args),
+ JSObject);
}
+ return Handle<JSObject>::cast(result);
}
-void Execution::ConfigureInstance(Isolate* isolate,
- Handle<Object> instance,
- Handle<Object> instance_template,
- bool* exc) {
+MaybeHandle<Object> Execution::ConfigureInstance(
+ Isolate* isolate,
+ Handle<Object> instance,
+ Handle<Object> instance_template) {
Handle<Object> args[] = { instance, instance_template };
- Execution::Call(isolate,
- isolate->configure_instance_fun(),
- isolate->js_builtins_object(),
- ARRAY_SIZE(args),
- args,
- exc);
+ return Execution::Call(isolate,
+ isolate->configure_instance_fun(),
+ isolate->js_builtins_object(),
+ arraysize(args),
+ args);
}
Handle<Object> is_global) {
Isolate* isolate = fun->GetIsolate();
Handle<Object> args[] = { recv, fun, pos, is_global };
- bool caught_exception;
- Handle<Object> result = TryCall(isolate->get_stack_trace_line_fun(),
- isolate->js_builtins_object(),
- ARRAY_SIZE(args),
- args,
- &caught_exception);
- if (caught_exception || !result->IsString()) {
- return isolate->factory()->empty_string();
+ MaybeHandle<Object> maybe_result =
+ TryCall(isolate->get_stack_trace_line_fun(),
+ isolate->js_builtins_object(),
+ arraysize(args),
+ args);
+ Handle<Object> result;
+ if (!maybe_result.ToHandle(&result) || !result->IsString()) {
+ return isolate->factory()->empty_string();
}
return Handle<String>::cast(result);
}
-static Object* RuntimePreempt(Isolate* isolate) {
- // Clear the preempt request flag.
- isolate->stack_guard()->Continue(PREEMPT);
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
- if (isolate->debug()->InDebugger()) {
- // If currently in the debugger don't do any actual preemption but record
- // that preemption occoured while in the debugger.
- isolate->debug()->PreemptionWhileInDebugger();
- } else {
- // Perform preemption.
- v8::Unlocker unlocker(reinterpret_cast<v8::Isolate*>(isolate));
- Thread::YieldCPU();
- }
-#else
- { // NOLINT
- // Perform preemption.
- v8::Unlocker unlocker(reinterpret_cast<v8::Isolate*>(isolate));
- Thread::YieldCPU();
- }
-#endif
-
- return isolate->heap()->undefined_value();
-}
-
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-Object* Execution::DebugBreakHelper(Isolate* isolate) {
- // Just continue if breaks are disabled.
- if (isolate->debug()->disable_break()) {
- return isolate->heap()->undefined_value();
- }
-
- // Ignore debug break during bootstrapping.
- if (isolate->bootstrapper()->IsActive()) {
- return isolate->heap()->undefined_value();
- }
-
- // Ignore debug break if debugger is not active.
- if (!isolate->debugger()->IsDebuggerActive()) {
- return isolate->heap()->undefined_value();
- }
-
- StackLimitCheck check(isolate);
- if (check.HasOverflowed()) {
- return isolate->heap()->undefined_value();
+Object* StackGuard::HandleInterrupts() {
+ if (CheckAndClearInterrupt(GC_REQUEST)) {
+ isolate_->heap()->CollectAllGarbage(Heap::kNoGCFlags, "GC interrupt");
}
- {
- JavaScriptFrameIterator it(isolate);
- ASSERT(!it.done());
- Object* fun = it.frame()->function();
- if (fun && fun->IsJSFunction()) {
- // Don't stop in builtin functions.
- if (JSFunction::cast(fun)->IsBuiltin()) {
- return isolate->heap()->undefined_value();
- }
- GlobalObject* global = JSFunction::cast(fun)->context()->global_object();
- // Don't stop in debugger functions.
- if (isolate->debug()->IsDebugGlobal(global)) {
- return isolate->heap()->undefined_value();
- }
- }
+ if (CheckDebugBreak() || CheckDebugCommand()) {
+ isolate_->debug()->HandleDebugBreak();
}
- // Collect the break state before clearing the flags.
- bool debug_command_only =
- isolate->stack_guard()->IsDebugCommand() &&
- !isolate->stack_guard()->IsDebugBreak();
-
- // Clear the debug break request flag.
- isolate->stack_guard()->Continue(DEBUGBREAK);
-
- ProcessDebugMessages(isolate, debug_command_only);
-
- // Return to continue execution.
- return isolate->heap()->undefined_value();
-}
-
-
-void Execution::ProcessDebugMessages(Isolate* isolate,
- bool debug_command_only) {
- // Clear the debug command request flag.
- isolate->stack_guard()->Continue(DEBUGCOMMAND);
-
- StackLimitCheck check(isolate);
- if (check.HasOverflowed()) {
- return;
+ if (CheckAndClearInterrupt(TERMINATE_EXECUTION)) {
+ return isolate_->TerminateExecution();
}
- HandleScope scope(isolate);
- // Enter the debugger. Just continue if we fail to enter the debugger.
- EnterDebugger debugger(isolate);
- if (debugger.FailedToEnter()) {
- return;
+ if (CheckAndClearInterrupt(DEOPT_MARKED_ALLOCATION_SITES)) {
+ isolate_->heap()->DeoptMarkedAllocationSites();
}
- // Notify the debug event listeners. Indicate auto continue if the break was
- // a debug command break.
- isolate->debugger()->OnDebugBreak(isolate->factory()->undefined_value(),
- debug_command_only);
-}
-
-
-#endif
-
-MaybeObject* Execution::HandleStackGuardInterrupt(Isolate* isolate) {
- StackGuard* stack_guard = isolate->stack_guard();
- if (stack_guard->ShouldPostponeInterrupts()) {
- return isolate->heap()->undefined_value();
+ if (CheckAndClearInterrupt(INSTALL_CODE)) {
+ DCHECK(isolate_->concurrent_recompilation_enabled());
+ isolate_->optimizing_compiler_thread()->InstallOptimizedFunctions();
}
- if (stack_guard->IsAPIInterrupt()) {
- stack_guard->InvokeInterruptCallback();
- stack_guard->Continue(API_INTERRUPT);
+ if (CheckAndClearInterrupt(API_INTERRUPT)) {
+ // Callback must be invoked outside of ExecusionAccess lock.
+ isolate_->InvokeApiInterruptCallback();
}
- if (stack_guard->IsGCRequest()) {
- isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
- "StackGuard GC request");
- stack_guard->Continue(GC_REQUEST);
- }
+ isolate_->counters()->stack_interrupts()->Increment();
+ isolate_->counters()->runtime_profiler_ticks()->Increment();
+ isolate_->runtime_profiler()->OptimizeNow();
- isolate->counters()->stack_interrupts()->Increment();
- isolate->counters()->runtime_profiler_ticks()->Increment();
-#ifdef ENABLE_DEBUGGER_SUPPORT
- if (stack_guard->IsDebugBreak() || stack_guard->IsDebugCommand()) {
- DebugBreakHelper(isolate);
- }
-#endif
- if (stack_guard->IsPreempted()) RuntimePreempt(isolate);
- if (stack_guard->IsTerminateExecution()) {
- stack_guard->Continue(TERMINATE);
- return isolate->TerminateExecution();
- }
- if (stack_guard->IsInterrupted()) {
- stack_guard->Continue(INTERRUPT);
- return isolate->StackOverflow();
- }
- if (stack_guard->IsFullDeopt()) {
- stack_guard->Continue(FULL_DEOPT);
- Deoptimizer::DeoptimizeAll(isolate);
- }
- if (stack_guard->IsDeoptMarkedAllocationSites()) {
- stack_guard->Continue(DEOPT_MARKED_ALLOCATION_SITES);
- isolate->heap()->DeoptMarkedAllocationSites();
- }
- if (stack_guard->IsInstallCodeRequest()) {
- ASSERT(isolate->concurrent_recompilation_enabled());
- stack_guard->Continue(INSTALL_CODE);
- isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
- }
- isolate->runtime_profiler()->OptimizeNow();
- return isolate->heap()->undefined_value();
+ return isolate_->heap()->undefined_value();
}
-
} } // namespace v8::internal
projects / platform / framework / web / crosswalk.git / blobdiff