X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/14957cd040308e3eeec43d26bae5d76da13fcd85..HEAD:/API/JSContextRef.cpp

diff --git a/API/JSContextRef.cpp b/API/JSContextRef.cpp
index 9c15b22..4976c29 100644
--- a/API/JSContextRef.cpp
+++ b/API/JSContextRef.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2006, 2007, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -10,34 +10,46 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE COMPUTER, INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. 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. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "JSContextRef.h"
-#include "JSContextRefPrivate.h"
+#include "JSContextRefInternal.h"
 
 #include "APICast.h"
+#include "CallFrame.h"
 #include "InitializeThreading.h"
-#include <interpreter/CallFrame.h>
-#include <interpreter/Interpreter.h>
 #include "JSCallbackObject.h"
 #include "JSClassRef.h"
 #include "JSGlobalObject.h"
 #include "JSObject.h"
-#include "UStringBuilder.h"
+#include "JSCInlines.h"
+#include "RuntimeFlags.h"
+#include "SourceProvider.h"
+#include "StackVisitor.h"
+#include <wtf/text/StringBuilder.h>
 #include <wtf/text/StringHash.h>
 
+#if ENABLE(REMOTE_INSPECTOR)
+#include "JSGlobalObjectDebuggable.h"
+#include "JSGlobalObjectInspectorController.h"
+#include "JSRemoteInspector.h"
+#endif
+
+#if ENABLE(INSPECTOR_ALTERNATE_DISPATCHERS)
+#include "JSContextRefInspectorSupport.h"
+#endif
 
 #if OS(DARWIN)
 #include <mach-o/dyld.h>
@@ -47,10 +59,24 @@ static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500;
 
 using namespace JSC;
 
+static RuntimeFlags javaScriptRuntimeFlags(const JSGlobalObject* globalObject)
+{
+    RuntimeFlags runtimeFlags = JSGlobalObject::javaScriptRuntimeFlags(globalObject);
+    runtimeFlags.setPromiseDisabled(true);
+    return runtimeFlags;
+}
+
+const GlobalObjectMethodTable JSC::javaScriptCoreAPIGlobalObjectMethodTable = { &JSGlobalObject::allowsAccessFrom, &JSGlobalObject::supportsProfiling, &JSGlobalObject::supportsRichSourceInfo, &JSGlobalObject::shouldInterruptScript, &javaScriptRuntimeFlags, nullptr, &JSGlobalObject::shouldInterruptScriptBeforeTimeout };
+
+// From the API's perspective, a context group remains alive iff
+//     (a) it has been JSContextGroupRetained
+//     OR
+//     (b) one of its contexts has been JSContextRetained
+
 JSContextGroupRef JSContextGroupCreate()
 {
     initializeThreading();
-    return toRef(JSGlobalData::createContextGroup(ThreadStackTypeSmall).leakRef());
+    return toRef(&VM::createContextGroup().leakRef());
 }
 
 JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
@@ -61,22 +87,65 @@ JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
 
 void JSContextGroupRelease(JSContextGroupRef group)
 {
-    toJS(group)->deref();
+    VM& vm = *toJS(group);
+
+    JSLockHolder locker(&vm);
+    vm.deref();
+}
+
+static bool internalScriptTimeoutCallback(ExecState* exec, void* callbackPtr, void* callbackData)
+{
+    JSShouldTerminateCallback callback = reinterpret_cast<JSShouldTerminateCallback>(callbackPtr);
+    JSContextRef contextRef = toRef(exec);
+    ASSERT(callback);
+    return callback(contextRef, callbackData);
 }
 
+static void createWatchdogIfNeeded(VM& vm)
+{
+    if (!vm.watchdog) {
+        vm.watchdog = std::make_unique<Watchdog>();
+
+        // The LLINT peeks into the Watchdog object directly. In order to do that,
+        // the LLINT assumes that the internal shape of a std::unique_ptr is the
+        // same as a plain C++ pointer, and loads the address of Watchdog from it.
+        RELEASE_ASSERT(*reinterpret_cast<Watchdog**>(&vm.watchdog) == vm.watchdog.get());
+    }
+}
+
+void JSContextGroupSetExecutionTimeLimit(JSContextGroupRef group, double limit, JSShouldTerminateCallback callback, void* callbackData)
+{
+    VM& vm = *toJS(group);
+    JSLockHolder locker(&vm);
+    createWatchdogIfNeeded(vm);
+    Watchdog& watchdog = *vm.watchdog;
+    if (callback) {
+        void* callbackPtr = reinterpret_cast<void*>(callback);
+        watchdog.setTimeLimit(vm, std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::duration<double>(limit)), internalScriptTimeoutCallback, callbackPtr, callbackData);
+    } else
+        watchdog.setTimeLimit(vm, std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::duration<double>(limit)));
+}
+
+void JSContextGroupClearExecutionTimeLimit(JSContextGroupRef group)
+{
+    VM& vm = *toJS(group);
+    JSLockHolder locker(&vm);
+    createWatchdogIfNeeded(vm);
+    Watchdog& watchdog = *vm.watchdog;
+    watchdog.setTimeLimit(vm, std::chrono::microseconds::max());
+}
+
+// From the API's perspective, a global context remains alive iff it has been JSGlobalContextRetained.
+
 JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
 {
     initializeThreading();
+
 #if OS(DARWIN)
-    // When running on Tiger or Leopard, or if the application was linked before JSGlobalContextCreate was changed
-    // to use a unique JSGlobalData, we use a shared one for compatibility.
-#ifndef BUILDING_ON_LEOPARD
+    // If the application was linked before JSGlobalContextCreate was changed to use a unique VM,
+    // we use a shared one for backwards compatibility.
     if (NSVersionOfLinkTimeLibrary("JavaScriptCore") <= webkitFirstVersionWithConcurrentGlobalContexts) {
-#else
-    {
-#endif
-        JSLock lock(LockForReal);
-        return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass);
+        return JSGlobalContextCreateInGroup(toRef(&VM::sharedInstance()), globalObjectClass);
     }
 #endif // OS(DARWIN)
 
@@ -87,154 +156,299 @@ JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClass
 {
     initializeThreading();
 
-    JSLock lock(LockForReal);
-    RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::createContextGroup(ThreadStackTypeSmall);
+    RefPtr<VM> vm = group ? PassRefPtr<VM>(toJS(group)) : VM::createContextGroup();
 
-    APIEntryShim entryShim(globalData.get(), false);
-
-#if ENABLE(JSC_MULTIPLE_THREADS)
-    globalData->makeUsableFromMultipleThreads();
-#endif
+    JSLockHolder locker(vm.get());
 
     if (!globalObjectClass) {
-        JSGlobalObject* globalObject = new (globalData.get()) JSGlobalObject(*globalData, JSGlobalObject::createStructure(*globalData, jsNull()));
+        JSGlobalObject* globalObject = JSGlobalObject::create(*vm, JSGlobalObject::createStructure(*vm, jsNull()), &javaScriptCoreAPIGlobalObjectMethodTable);
+#if ENABLE(REMOTE_INSPECTOR)
+        if (JSRemoteInspectorGetInspectionEnabledByDefault())
+            globalObject->setRemoteDebuggingEnabled(true);
+#endif
         return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
     }
 
-    JSGlobalObject* globalObject = new (globalData.get()) JSCallbackObject<JSGlobalObject>(*globalData, globalObjectClass, JSCallbackObject<JSGlobalObject>::createStructure(*globalData, jsNull()));
+    JSGlobalObject* globalObject = JSCallbackObject<JSGlobalObject>::create(*vm, globalObjectClass, JSCallbackObject<JSGlobalObject>::createStructure(*vm, 0, jsNull()));
     ExecState* exec = globalObject->globalExec();
     JSValue prototype = globalObjectClass->prototype(exec);
     if (!prototype)
         prototype = jsNull();
-    globalObject->resetPrototype(*globalData, prototype);
+    globalObject->resetPrototype(*vm, prototype);
+#if ENABLE(REMOTE_INSPECTOR)
+    if (JSRemoteInspectorGetInspectionEnabledByDefault())
+        globalObject->setRemoteDebuggingEnabled(true);
+#endif
     return JSGlobalContextRetain(toGlobalRef(exec));
 }
 
 JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    APIEntryShim entryShim(exec);
+    JSLockHolder locker(exec);
 
-    JSGlobalData& globalData = exec->globalData();
-    gcProtect(exec->dynamicGlobalObject());
-    globalData.ref();
+    VM& vm = exec->vm();
+    gcProtect(exec->vmEntryGlobalObject());
+    vm.ref();
     return ctx;
 }
 
 void JSGlobalContextRelease(JSGlobalContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    JSLock lock(exec);
-
-    JSGlobalData& globalData = exec->globalData();
-    JSGlobalObject* dgo = exec->dynamicGlobalObject();
-    IdentifierTable* savedIdentifierTable = wtfThreadData().setCurrentIdentifierTable(globalData.identifierTable);
-
-    // One reference is held by JSGlobalObject, another added by JSGlobalContextRetain().
-    bool releasingContextGroup = globalData.refCount() == 2;
-    bool releasingGlobalObject = Heap::heap(dgo)->unprotect(dgo);
-    // If this is the last reference to a global data, it should also
-    // be the only remaining reference to the global object too!
-    ASSERT(!releasingContextGroup || releasingGlobalObject);
-
-    // An API 'JSGlobalContextRef' retains two things - a global object and a
-    // global data (or context group, in API terminology).
-    // * If this is the last reference to any contexts in the given context group,
-    //   call destroy on the heap (the global data is being  freed).
-    // * If this was the last reference to the global object, then unprotecting
-    //   it may release a lot of GC memory - tickle the activity callback to
-    //   garbage collect soon.
-    // * If there are more references remaining the the global object, then do nothing
-    //   (specifically that is more protects, which we assume come from other JSGlobalContextRefs).
-    if (releasingContextGroup) {
-        globalData.clearBuiltinStructures();
-        globalData.heap.destroy();
-    } else if (releasingGlobalObject) {
-        globalData.heap.activityCallback()->synchronize();
-        (*globalData.heap.activityCallback())();
-    }
-
-    globalData.deref();
+    JSLockHolder locker(exec);
 
-    wtfThreadData().setCurrentIdentifierTable(savedIdentifierTable);
+    VM& vm = exec->vm();
+    bool protectCountIsZero = Heap::heap(exec->vmEntryGlobalObject())->unprotect(exec->vmEntryGlobalObject());
+    if (protectCountIsZero)
+        vm.heap.reportAbandonedObjectGraph();
+    vm.deref();
 }
 
 JSObjectRef JSContextGetGlobalObject(JSContextRef ctx)
 {
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
     ExecState* exec = toJS(ctx);
-    APIEntryShim entryShim(exec);
+    JSLockHolder locker(exec);
 
-    // It is necessary to call toThisObject to get the wrapper object when used with WebCore.
-    return toRef(exec->lexicalGlobalObject()->toThisObject(exec));
+    return toRef(jsCast<JSObject*>(exec->lexicalGlobalObject()->methodTable()->toThis(exec->lexicalGlobalObject(), exec, NotStrictMode)));
 }
 
 JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
 {
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
     ExecState* exec = toJS(ctx);
-    return toRef(&exec->globalData());
+    return toRef(&exec->vm());
 }
 
 JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
 {
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
     ExecState* exec = toJS(ctx);
-    APIEntryShim entryShim(exec);
+    JSLockHolder locker(exec);
 
     return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
 }
-    
-JSStringRef JSContextCreateBacktrace(JSContextRef ctx, unsigned maxStackSize)
+
+JSStringRef JSGlobalContextCopyName(JSGlobalContextRef ctx)
 {
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+
     ExecState* exec = toJS(ctx);
-    JSLock lock(exec);
-
-    unsigned count = 0;
-    UStringBuilder builder;
-    CallFrame* callFrame = exec;
-    UString functionName;
-    if (exec->callee()) {
-        if (asObject(exec->callee())->inherits(&InternalFunction::s_info)) {
-            functionName = asInternalFunction(exec->callee())->name(exec);
-            builder.append("#0 ");
-            builder.append(functionName);
-            builder.append("() ");
-            count++;
-        }
+    JSLockHolder locker(exec);
+
+    String name = exec->vmEntryGlobalObject()->name();
+    if (name.isNull())
+        return 0;
+
+    return OpaqueJSString::create(name).leakRef();
+}
+
+void JSGlobalContextSetName(JSGlobalContextRef ctx, JSStringRef name)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
     }
-    while (true) {
-        ASSERT(callFrame);
-        int signedLineNumber;
-        intptr_t sourceID;
-        UString urlString;
-        JSValue function;
-        
-        UString levelStr = UString::number(count);
-        
-        exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
-
-        if (function)
-            functionName = asFunction(function)->name(exec);
-        else {
-            // Caller is unknown, but if frame is empty we should still add the frame, because
-            // something called us, and gave us arguments.
-            if (count)
-                break;
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    exec->vmEntryGlobalObject()->setName(name ? name->string() : String());
+}
+
+
+class BacktraceFunctor {
+public:
+    BacktraceFunctor(StringBuilder& builder, unsigned remainingCapacityForFrameCapture)
+        : m_builder(builder)
+        , m_remainingCapacityForFrameCapture(remainingCapacityForFrameCapture)
+    {
+    }
+
+    StackVisitor::Status operator()(StackVisitor& visitor)
+    {
+        if (m_remainingCapacityForFrameCapture) {
+            // If callee is unknown, but we've not added any frame yet, we should
+            // still add the frame, because something called us, and gave us arguments.
+            JSObject* callee = visitor->callee();
+            if (!callee && visitor->index())
+                return StackVisitor::Done;
+
+            StringBuilder& builder = m_builder;
+            if (!builder.isEmpty())
+                builder.append('\n');
+            builder.append('#');
+            builder.appendNumber(visitor->index());
+            builder.append(' ');
+            builder.append(visitor->functionName());
+            builder.appendLiteral("() at ");
+            builder.append(visitor->sourceURL());
+            if (visitor->isJSFrame()) {
+                builder.append(':');
+                unsigned lineNumber;
+                unsigned unusedColumn;
+                visitor->computeLineAndColumn(lineNumber, unusedColumn);
+                builder.appendNumber(lineNumber);
+            }
+
+            if (!callee)
+                return StackVisitor::Done;
+
+            m_remainingCapacityForFrameCapture--;
+            return StackVisitor::Continue;
         }
-        unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
-        if (!builder.isEmpty())
-            builder.append("\n");
-        builder.append("#");
-        builder.append(levelStr);
-        builder.append(" ");
-        builder.append(functionName);
-        builder.append("() at ");
-        builder.append(urlString);
-        builder.append(":");
-        builder.append(UString::number(lineNumber));
-        if (!function || ++count == maxStackSize)
-            break;
-        callFrame = callFrame->callerFrame();
+        return StackVisitor::Done;
+    }
+
+private:
+    StringBuilder& m_builder;
+    unsigned m_remainingCapacityForFrameCapture;
+};
+
+JSStringRef JSContextCreateBacktrace(JSContextRef ctx, unsigned maxStackSize)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+    StringBuilder builder;
+    CallFrame* frame = exec->vm().topCallFrame;
+
+    ASSERT(maxStackSize);
+    BacktraceFunctor functor(builder, maxStackSize);
+    frame->iterate(functor);
+
+    return OpaqueJSString::create(builder.toString()).leakRef();
+}
+
+bool JSGlobalContextGetRemoteInspectionEnabled(JSGlobalContextRef ctx)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return false;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    return exec->vmEntryGlobalObject()->remoteDebuggingEnabled();
+}
+
+void JSGlobalContextSetRemoteInspectionEnabled(JSGlobalContextRef ctx, bool enabled)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    exec->vmEntryGlobalObject()->setRemoteDebuggingEnabled(enabled);
+}
+
+bool JSGlobalContextGetIncludesNativeCallStackWhenReportingExceptions(JSGlobalContextRef ctx)
+{
+#if ENABLE(REMOTE_INSPECTOR)
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return false;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    JSGlobalObject* globalObject = exec->vmEntryGlobalObject();
+    return globalObject->inspectorController().includesNativeCallStackWhenReportingExceptions();
+#else
+    UNUSED_PARAM(ctx);
+    return false;
+#endif
+}
+
+void JSGlobalContextSetIncludesNativeCallStackWhenReportingExceptions(JSGlobalContextRef ctx, bool includesNativeCallStack)
+{
+#if ENABLE(REMOTE_INSPECTOR)
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
     }
-    return OpaqueJSString::create(builder.toUString()).leakRef();
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    JSGlobalObject* globalObject = exec->vmEntryGlobalObject();
+    globalObject->inspectorController().setIncludesNativeCallStackWhenReportingExceptions(includesNativeCallStack);
+#else
+    UNUSED_PARAM(ctx);
+    UNUSED_PARAM(includesNativeCallStack);
+#endif
 }
 
+#if USE(CF)
+CFRunLoopRef JSGlobalContextGetDebuggerRunLoop(JSGlobalContextRef ctx)
+{
+#if ENABLE(REMOTE_INSPECTOR)
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return nullptr;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    return exec->vmEntryGlobalObject()->inspectorDebuggable().debuggerRunLoop();
+#else
+    UNUSED_PARAM(ctx);
+    return nullptr;
+#endif
+}
 
+void JSGlobalContextSetDebuggerRunLoop(JSGlobalContextRef ctx, CFRunLoopRef runLoop)
+{
+#if ENABLE(REMOTE_INSPECTOR)
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    exec->vmEntryGlobalObject()->inspectorDebuggable().setDebuggerRunLoop(runLoop);
+#else
+    UNUSED_PARAM(ctx);
+    UNUSED_PARAM(runLoop);
+#endif
+}
+#endif // USE(CF)
+
+#if ENABLE(INSPECTOR_ALTERNATE_DISPATCHERS)
+Inspector::AugmentableInspectorController* JSGlobalContextGetAugmentableInspectorController(JSGlobalContextRef ctx)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return nullptr;
+    }
+
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+
+    return &exec->vmEntryGlobalObject()->inspectorController();
+}
+#endif