JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / API / JSContextRef.cpp

diff --git a/API/JSContextRef.cpp b/API/JSContextRef.cpp
index b97ceda6799a66e823379a414421239a3c4bac2c..3869e87bfff7db7190e40ed2807874d1612c90e9 100644 (file)
--- a/API/JSContextRef.cpp
+++ b/API/JSContextRef.cpp
@@ -29,10 +29,15 @@
 
 #include "APICast.h"
 #include "InitializeThreading.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 "JSObject.h"
 #include "JSCallbackObject.h"
 #include "JSClassRef.h"
 #include "JSGlobalObject.h"
 #include "JSObject.h"

+#include "Operations.h"
+#include "SourceProvider.h"
+#include <wtf/text/StringBuilder.h>

 #include <wtf/text/StringHash.h>
 
 #if OS(DARWIN)
 #include <wtf/text/StringHash.h>
 
 #if OS(DARWIN)


@@ -43,10 +48,15 @@ static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500;
 
 using namespace JSC;
 
 
 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();
 JSContextGroupRef JSContextGroupCreate()
 {
     initializeThreading();

-    return toRef(JSGlobalData::createContextGroup(ThreadStackTypeSmall).releaseRef());
+    return toRef(VM::createContextGroup().leakRef());

 }
 
 JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
 }
 
 JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)


@@ -57,22 +67,57 @@ JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
 
 void JSContextGroupRelease(JSContextGroupRef group)
 {
 
 void JSContextGroupRelease(JSContextGroupRef group)
 {

-    toJS(group)->deref();
+    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)
 {
     initializeThreading();
 JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
 {
     initializeThreading();

+

 #if OS(DARWIN)
 #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.
-#if !defined(BUILDING_ON_TIGER) && !defined(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) {
     if (NSVersionOfLinkTimeLibrary("JavaScriptCore") <= webkitFirstVersionWithConcurrentGlobalContexts) {

-#else
-    {
-#endif
-        JSLock lock(LockForReal);
-        return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass);
+        return JSGlobalContextCreateInGroup(toRef(&VM::sharedInstance()), globalObjectClass);

     }
 #endif // OS(DARWIN)
 
     }
 #endif // OS(DARWIN)
 


@@ -83,26 +128,22 @@ JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClass
 {
     initializeThreading();
 
 {
     initializeThreading();
 

-    JSLock lock(LockForReal);
-    RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::createContextGroup(ThreadStackTypeSmall);
-
-    APIEntryShim entryShim(globalData.get(), false);
+    RefPtr<VM> vm = group ? PassRefPtr<VM>(toJS(group)) : VM::createContextGroup();

 
 

-#if ENABLE(JSC_MULTIPLE_THREADS)
-    globalData->makeUsableFromMultipleThreads();
-#endif
+    APIEntryShim entryShim(vm.get(), false);
+    vm->makeUsableFromMultipleThreads();

 
     if (!globalObjectClass) {
 
     if (!globalObjectClass) {

-        JSGlobalObject* globalObject = new (globalData.get()) JSGlobalObject;
+        JSGlobalObject* globalObject = JSGlobalObject::create(*vm, JSGlobalObject::createStructure(*vm, jsNull()));

         return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
     }
 
         return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
     }
 

-    JSGlobalObject* globalObject = new (globalData.get()) JSCallbackObject<JSGlobalObject>(globalObjectClass);
+    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();
     ExecState* exec = globalObject->globalExec();
     JSValue prototype = globalObjectClass->prototype(exec);
     if (!prototype)
         prototype = jsNull();

-    globalObject->resetPrototype(prototype);
+    globalObject->resetPrototype(*vm, prototype);

     return JSGlobalContextRetain(toGlobalRef(exec));
 }
 
     return JSGlobalContextRetain(toGlobalRef(exec));
 }
 


@@ -111,65 +152,110 @@ JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
     ExecState* exec = toJS(ctx);
     APIEntryShim entryShim(exec);
 
     ExecState* exec = toJS(ctx);
     APIEntryShim entryShim(exec);
 

-    JSGlobalData& globalData = exec->globalData();
+    VM& vm = exec->vm();

     gcProtect(exec->dynamicGlobalObject());
     gcProtect(exec->dynamicGlobalObject());

-    globalData.ref();
+    vm.ref();

     return ctx;
 }
 
 void JSGlobalContextRelease(JSGlobalContextRef ctx)
 {
     return ctx;
 }
 
 void JSGlobalContextRelease(JSGlobalContextRef ctx)
 {

+    IdentifierTable* savedIdentifierTable;

     ExecState* exec = toJS(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 - run the garbage collector now.
-    // * 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.heap.destroy();
-    else if (releasingGlobalObject)
-        globalData.heap.collectAllGarbage();
-
-    globalData.deref();
+    {
+        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)
 {
 
     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.
     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()->toThisObject(exec));
+    return toRef(exec->lexicalGlobalObject()->methodTable()->toThisObject(exec->lexicalGlobalObject(), exec));

 }
 
 JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
 {
 }
 
 JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
 {

+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }

     ExecState* exec = toJS(ctx);
     ExecState* exec = toJS(ctx);

-    return toRef(&exec->globalData());
+    return toRef(&exec->vm());

 }
 
 JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
 {
 }
 
 JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
 {

+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }

     ExecState* exec = toJS(ctx);
     APIEntryShim entryShim(exec);
 
     return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
 }
     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();
+}
+
+