X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/b37bf2e156556c589aea3e1f58a377f2b1189665..93a3786624b2768d89bfa27e46598dc64e2fb70a:/API/JSContextRef.cpp?ds=inline

diff --git a/API/JSContextRef.cpp b/API/JSContextRef.cpp
index 203326e..3869e87 100644
--- a/API/JSContextRef.cpp
+++ b/API/JSContextRef.cpp
@@ -1,4 +1,3 @@
-// -*- mode: c++; c-basic-offset: 4 -*-
 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *
@@ -26,51 +25,237 @@
 
 #include "config.h"
 #include "JSContextRef.h"
+#include "JSContextRefPrivate.h"
 
 #include "APICast.h"
+#include "InitializeThreading.h"
+#include <interpreter/CallFrame.h>
+#include <interpreter/Interpreter.h>
 #include "JSCallbackObject.h"
 #include "JSClassRef.h"
 #include "JSGlobalObject.h"
-#include "object.h"
-#include <wtf/Platform.h>
+#include "JSObject.h"
+#include "Operations.h"
+#include "SourceProvider.h"
+#include <wtf/text/StringBuilder.h>
+#include <wtf/text/StringHash.h>
 
-using namespace KJS;
+#if OS(DARWIN)
+#include <mach-o/dyld.h>
+
+static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500; // 528.5.0
+#endif
+
+using namespace JSC;
+
+// 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(VM::createContextGroup().leakRef());
+}
+
+JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
+{
+    toJS(group)->ref();
+    return group;
+}
+
+void JSContextGroupRelease(JSContextGroupRef group)
+{
+    IdentifierTable* savedIdentifierTable;
+    VM& vm = *toJS(group);
+
+    {
+        JSLockHolder lock(vm);
+        savedIdentifierTable = wtfThreadData().setCurrentIdentifierTable(vm.identifierTable);
+        vm.deref();
+    }
+
+    wtfThreadData().setCurrentIdentifierTable(savedIdentifierTable);
+}
+
+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);
+}
+
+void JSContextGroupSetExecutionTimeLimit(JSContextGroupRef group, double limit, JSShouldTerminateCallback callback, void* callbackData)
+{
+    VM& vm = *toJS(group);
+    APIEntryShim entryShim(&vm);
+    Watchdog& watchdog = vm.watchdog;
+    if (callback) {
+        void* callbackPtr = reinterpret_cast<void*>(callback);
+        watchdog.setTimeLimit(vm, limit, internalScriptTimeoutCallback, callbackPtr, callbackData);
+    } else
+        watchdog.setTimeLimit(vm, limit);
+}
+
+void JSContextGroupClearExecutionTimeLimit(JSContextGroupRef group)
+{
+    VM& vm = *toJS(group);
+    APIEntryShim entryShim(&vm);
+    Watchdog& watchdog = vm.watchdog;
+    watchdog.setTimeLimit(vm, std::numeric_limits<double>::infinity());
+}
+
+// From the API's perspective, a global context remains alive iff it has been JSGlobalContextRetained.
 
 JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
 {
-    JSLock lock;
+    initializeThreading();
+
+#if OS(DARWIN)
+    // 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) {
+        return JSGlobalContextCreateInGroup(toRef(&VM::sharedInstance()), globalObjectClass);
+    }
+#endif // OS(DARWIN)
+
+    return JSGlobalContextCreateInGroup(0, globalObjectClass);
+}
+
+JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClassRef globalObjectClass)
+{
+    initializeThreading();
+
+    RefPtr<VM> vm = group ? PassRefPtr<VM>(toJS(group)) : VM::createContextGroup();
+
+    APIEntryShim entryShim(vm.get(), false);
+    vm->makeUsableFromMultipleThreads();
 
     if (!globalObjectClass) {
-        JSGlobalObject* globalObject = new JSGlobalObject;
+        JSGlobalObject* globalObject = JSGlobalObject::create(*vm, JSGlobalObject::createStructure(*vm, jsNull()));
         return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
     }
 
-    JSGlobalObject* globalObject = new JSCallbackObject<JSGlobalObject>(globalObjectClass);
-    JSGlobalContextRef ctx = toGlobalRef(globalObject->globalExec());
-    JSValue* prototype = globalObjectClass->prototype(ctx);
+    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->reset(prototype);
-    return JSGlobalContextRetain(ctx);
+    globalObject->resetPrototype(*vm, prototype);
+    return JSGlobalContextRetain(toGlobalRef(exec));
 }
 
 JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
 {
-    JSLock lock;
     ExecState* exec = toJS(ctx);
+    APIEntryShim entryShim(exec);
+
+    VM& vm = exec->vm();
     gcProtect(exec->dynamicGlobalObject());
+    vm.ref();
     return ctx;
 }
 
 void JSGlobalContextRelease(JSGlobalContextRef ctx)
 {
-    JSLock lock;
+    IdentifierTable* savedIdentifierTable;
     ExecState* exec = toJS(ctx);
-    gcUnprotect(exec->dynamicGlobalObject());
+    {
+        JSLockHolder lock(exec);
+
+        VM& vm = exec->vm();
+        savedIdentifierTable = wtfThreadData().setCurrentIdentifierTable(vm.identifierTable);
+
+        bool protectCountIsZero = Heap::heap(exec->dynamicGlobalObject())->unprotect(exec->dynamicGlobalObject());
+        if (protectCountIsZero)
+            vm.heap.reportAbandonedObjectGraph();
+        vm.deref();
+    }
+
+    wtfThreadData().setCurrentIdentifierTable(savedIdentifierTable);
 }
 
 JSObjectRef JSContextGetGlobalObject(JSContextRef ctx)
 {
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    APIEntryShim entryShim(exec);
+
+    // It is necessary to call toThisObject to get the wrapper object when used with WebCore.
+    return toRef(exec->lexicalGlobalObject()->methodTable()->toThisObject(exec->lexicalGlobalObject(), exec));
+}
+
+JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
     ExecState* exec = toJS(ctx);
-    return toRef(exec->dynamicGlobalObject());
+    return toRef(&exec->vm());
 }
+
+JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    APIEntryShim entryShim(exec);
+
+    return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
+}
+    
+JSStringRef JSContextCreateBacktrace(JSContextRef ctx, unsigned maxStackSize)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder lock(exec);
+    StringBuilder builder;
+    Vector<StackFrame> stackTrace;
+    Interpreter::getStackTrace(&exec->vm(), stackTrace, maxStackSize);
+
+    for (size_t i = 0; i < stackTrace.size(); i++) {
+        String urlString;
+        String functionName;
+        StackFrame& frame = stackTrace[i];
+        JSValue function = frame.callee.get();
+        if (frame.callee)
+            functionName = frame.friendlyFunctionName(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 (i)
+                break;
+        }
+        unsigned lineNumber;
+        unsigned column;
+        frame.computeLineAndColumn(lineNumber, column);
+        if (!builder.isEmpty())
+            builder.append('\n');
+        builder.append('#');
+        builder.appendNumber(i);
+        builder.append(' ');
+        builder.append(functionName);
+        builder.appendLiteral("() at ");
+        builder.append(urlString);
+        if (frame.codeType != StackFrameNativeCode) {
+            builder.append(':');
+            builder.appendNumber(lineNumber);
+        }
+        if (!function)
+            break;
+    }
+    return OpaqueJSString::create(builder.toString()).leakRef();
+}
+
+